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* GB784833 (A)
Description: GB784833 (A) ? 1957-10-16
Method and machine for winding conical sleeves from paper or paste-board
strip
Description of GB784833 (A)
PATENT SPECIFICATION
784,833 I Date of Application and filing Complete Specification: Sept
22, 1953
No 26161153.
Application made in Germany on Sept 22, 1952.
Ha Complete Specification Published: Oct 16, 1957.
Index at acceptance:-Class 99 ( 2), Pl(A 6: All: B 6), P 2 A 2.
International Classification:-FO 61.
COMPLETE SPECIFICATION
Method and Machine for Winding Conical Sleeves from Paper or
Paste-board Strip I, CHRISTIAN MAJER, of 10-14, Schwarzlocherstrasse,
Tubingen/Wurtemberg, Germany, a German Citizen, do hereby declare the
invention, for which I pray that a patent may be granted to me, and
the method by which it is to be performed, to be particularly
described in and by the following statement:
This invention relates to the winding of conical sleeves from a web of
paper or paste-board strip, especially multi-layer sleeves having a
large diameter, and in some cases considerable conicity, for textile
purposes.
When using double spindle sleeve-winding machines in which the paper
or paste-board web is supplied from the reel to the two winding
spindles at a right angle or obliquely so as to enter laterally
between the two spindles, it is known to sever from the web a double
segment, corresponding to two sleeves, to turn the same between the
two spindles to such an extent that the line of division between the
two individual segments comes to lie over a dividing cutter disposed
between the spindles and thereupon to perform the division into the
individual segments and their lateral removal to the winding spindles.
This method, in which the division of the double segment is thus
effected at a place which can be reached by mere turning of the double
segment, is quite appropriate for the production of light conical
sleeves for which correspondingly narrow webs are used, as the
distance between the two spindles, which must at least be greater than
the width of the web in order to allow of the turning of the double
segment between them, still remains within tolerable limits.
Because, a greater distance between the spindles, dependent on the
width of the web, involves a longer movement of the conveyor tongs or
gripper serving for the lateral removal of the individual segments
lPrice 3 H to the winding spindles, the output of the machine is the
more favourable the smaller the said distance.
By a recent change of practice, heavier multi-layer sleeves of larger
diameter and, 50 in some cases, of greater conicity, which previously
had been produced on singlespindle machines only, have also been
produced on two-spindle machines Consequently, it has become necessary
to use 55 webs whose width amounts to up to five times the lenath of
the sleeve Using the previous method, this results iln a greater
distance between the winding spindles and therefore a reduction in the
output of the 60 machine.
In accordance with the present invention, in a method for the winding
of such conical sleeves on a two-spindle winding machine, a double
segment corresponding to two 65 sleeves is severed from the web fed at
right angles to the longitudinal axes of the two spindles, is turned
and advanced a predetermined distance substantially in the direction
of the web feed so as to bring the 70 line on which the double segment
is to be divided over a cutter by which the said segment is then
divided, and the individual segments thus produced are supplied to
respective spindles This advancing of the 75 double segment beyond the
region of turning thereof permits the dividing cutter and the winding
spindles to be displaced in the same direction so that they lie
outside the said region Consequently, the distance 80 between the
spindles can now correspond to about the length of the sleeve to be
produced, that is it may in some cases be a fifth of the distance
hitherto necessary.
A shorter tongs or gripper movement and 85 a correspondingly increased
output of the machine result.
According to the invention, such a machine comprises means for feeding
the web at right angles to the axes of the spindles, 90 LL z Ca'9
means for severing a double segment from the web, means for turning
the double segment and means, located for operation between the
spindles, for dividing the double segment, means for advancing the
double segment substantially in the direction of web feed from the
place where it is turned to the place where it is divided and means
for moving the individual segments from the latter place to respective
spindles.
Advantageously, the distance between the winding spindles is made as
small as is permitted by the length of the longest sleeves to be
produced, so that tile double I 5 segment can be advanced between tile
spindles only after it has been turned.
One way of carrying the invention into effect is illustrated by way of
example in the accompanying drawing which is a diagrammatic plan view
of the relevant parts of a sleeve-winding machine.
In the two-spindle winding machine for the production of conical
sleeves illustrated in the drawing, 1 is the paper web which is fed to
the winding spindles 10, 11 in the horizontal plane containing the
common axis of the said spindles and in a direction transverse to the
said axis Two shaping blades 2, 3 cut off a double segment 4, 5 from
the web 1, 6 indicating the line of division along which the double
segment is subsequently separated The double segment 4, 5 cut off is
turned in per se known manner by a pivot 7 so that the line 6 comes to
lie substantially transversely of the direction of travel of the web.
At this turning place, in the known machines, there was a blade, for
dividing the double segment, which w-as flanked by the two winding
spindles, the distance between the spindles corresponding at least to
the width of the web.
In accordance with the present invention, the division is not effected
at this turning place, but the turned double segment 4-.
is first drawn forward in the aforesaid horizontal plane by a gripper
or feed tongs S substantially in the direction of travel of the web 1,
in practice slightly obliquely in relation to this direction, and is
only then divided at 9 by a cutter In comparison with the known
machines, the cutter and the winding spindles are advanced in the
direction of travel of the web 1, namely to such an extent at least
that the double segment 4, 5 can be introduced, inl the already turned
position, between the winding spindles 10, 11 flanking the place of
division Consequently, the spindles 10, 11 lie outside the region of
turning of the double segment and can be brought as near to each other
as is permitted by the length of the sleeves to be produced, that is
the width of the double segment.
The drawing shows a cut-off double segment 4, 5 in the turned position
at 41, 51 and, after the advance movement, at 411, 511 In this
position, the line of division 6 is situated over the place of
division 9, whence the two individual segments are fed after 70 the
division, in the direction of the arrows, to the positions 4111, 5111
T and thus to the two winding spindles 10, 11 In order to be able to
deal with different widths of paper web, or to produce sleeves of
different lengths without 75 adjustment of the movement of the gripper
or feed tongs S being necessary for the purpose, care is taken that
the line 6 of division is always at the samie distance from the centre
of the pivot 7 Adjustment of the machine 80 for different kinds of
sleeves is thus considerably simplified.
Instead of displacing tile individual segments directly from the place
9 of division in the direction of the arrows parallel to 85 the
spindles 10, 11, they may first be moved further by a small amount in
the horizontal plane in a direction transverse to the axes of the
spindles, the upper segment 411 upwardly of the drawing and the lower
90 segment 511 downwardly thereof, and may only then be fed towardls
the spindles at a radial distance therefrom.
The spindles 10, 11 are supported at one end only in bearings 26, 27
and are driven at 95 28 The spindles and bearings are provided inll
lknown manner with longitudinal slots for the reception of the edges
of the segments.
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* GB784834 (A)
Description: GB784834 (A) ? 1957-10-16
Method and machine for winding sleeves from paper or paste board
Description of GB784834 (A)
PATENT SPECIFICATION
784,834 4 d t W- Date of Application and filing Complete
Specification: Sept22, 1953.
& ti ' No 6928/57.
Application made in Germany on June 2, 1953.
(Divided out of No 784,833) Complete Specification Published: Oct 16,
1957.
Index at acceptance:-Class 99 ( 2), P( 1 All:1 B 6: 2 A 2).
International Classification:-FO 61.
COMPLETE SPECIFICATION
Method and Machine for Winding Sleeves from Paper or Paste Board I,
JOHN RICHARD Tu Gwoo D, of 77, Chancery Lane, London, W C 2, a British
Subject, personal representative of CHRISTIAN MAJ Em, of 10-14,
Schwarzlocherstrasse, Tiibingen/Wfirttemberg, Germany, a German
Citizen, deceased, do hereby declare the invention, for which I pray
that a patent may be granted to me, and the method by which it is to
be performed to be particularly described in and by the following
statement:-
This invention relates to a method and machine for winding sleeves
from a web of paper or paste board, particularly but not exclusively
multi-layer sleeves for textile purposes It is concerned with the
winding of such sleeves on machines of the kind in which the web is
fed towards the winding spindle parallel to the axis of the said
spindle which has a fixed position and is supported in over-hung
fashion at one end, namely the end in the direction from which the web
is fed An object of the invention is to avoid unnecessary idle
movement between the cutter, which severs a blank from the web, and
the winding position.
In known machines of this kind, the web is brought with its front edge
just short of the spindle bearing, which is co-axial with the spindle,
and into such a position that the web, upon its further advance in the
direction of feed, enters the usual somewhat wider or deeper entry
slot provided in the bearing, in the prolongation of the entraining
slot in the spindle, and, after passing through the said entry slot,
enters the said entraining slot With this manner of operation, in
which entry into the slots is impossible as long as these are rotating
for the winding of the preceding sleeve, the movement from the end,
nearest to the front edge of the web, of the bearing to the
commencement of the spindle slot, that is to the beginning of the
winding portion of the spindle, is a purely idle movement which re
ents an expensive lPrice o.
loss of time, since two bearings, which should be as far apart as
possible, are in practice provided for the one-ended support of the
spindle, so that the idle movement is appreciable 50 An attempt has
been made to remedy this defect by bringing the two bearings as near
together as possible This, however, results in poor support of the
spindle, skewed winding of the blanks and therefore 55 uneven sleeves
and many rejects.
According to the invention, with the object of avoiding or reducing
these defects, the web is fed towards the spindle at a radial distance
from the spindle bearings 60 and with the longitudinal edge parallel
to the spindle at least as far as the beginning of the winding portion
of the spindle and the blank cut off is thereafter brought by a
transverse movement into the winding 65 position in relation to the
spindle, which transverse movement may be followed by a further
movement in the direction of the axis of the spindle.
This method has the advantage that the 70 feed is not effected by the
position of the spindle bearings which can be set well apart for the
sake of good support of the spindle Furthermore, a comparatively short
transverse movement, instead of the long 75 axial movement previously
necessary, allows of substantially increasing the output of the
machine The transverse movement may be effected mechanically or by air
suction.
In a machine for carrying out this method, 80 the feeding means for
the web may be so arranged and devised as to feed the web axially to
the winding spindle, at least as far as the beginning of the winding
portion of the spindle, at a certain radial distance 85 from the
spindle bearings, mechanical or pneumatic means being provided which
produces a transverse movement of the web in the direction of entry
into the bearing and spindle slots 90 As mechanical means for
effecting the transverse movement, suitably, a transversely movable
gripper is provided, preferably in front, with respect to the
direction of advance of the blank, of the spindle bearings The
movement of the gripper can be influenced, during operation of the
machine, by adjustable stop means The gripper is arranged to seize the
cut-off blank at the edge and draw it into the slot in the spindle
bearings, whereafter a longitudinal gripper effects the fuirther,
axial.
advance into the slot in the spindle The transverse gripper can be
utilized also to produce a compensating effect if the web is drawn off
askew from the reel for any reason.
If suction is used for the transverse movement, say by providing an
air slot.
connected to a source of suction, instead of the usual entraining slot
in the spindle, the transverse movement of the cut-off blank can be
effected after the latter is located wholly in the region of the
spindle.
One way of carrying the invention into effect is illustrated by way of
example in the accompanying drawing, in which:Figure 1 is a
diagrammatic plan view of the relevant parts of a sleeve-wvinding
machine, Figure 2 is a diagrammatic elevation of a transverse-gripper
arrangement used in the said machine, and Figure 3 a cross section
through the winding spindle thereof.
The drawing illustrates the parts, essential for the invention, of a
single-spindle sleevewinding machine in which the paper web is
supplied parallel to the spindle In Figure 1, 21 represents a pair of
web-advancing rolls by which the web 22 of paper is supplied from the
reel to the winding spindle 24 in a direction parallel to the
longitudinal axis of the latter The cutting off of the section of
paper required as blank for each sleeve is here effected at the cutter
25.
The winding spindle 24 is supported in the usual manner at one end
only, namely the end from which the web is supplied, by means of two
bearings 26, 27 arranged at a distance from each other The drive 28
for the spindle 24 comprises a pinion mounted on its journal 30 The
spindle 24 has the usual entraining slot 29 which is prolonged by
wider and/or deeper entry slots 31 in the journal 30, the aforesaid
pinion and the spindle bearings 26, 27.
Hitherto, by means of a longitudinal gripper 23, the paper blank has
been directly introduced with its longitudinal edge 32 into the entry
slot 31 and thereafter into the entraining slot 29 As the winding
spindle, with its journal and pinion, is in motion during the winding
of a sleeve, the next following blank could be brought only as far as
the spindle bearing 26 on the entry side and could enter the slots
only when, the spindle had come to rest.
In the machine illustrated, the rolls 21 and other elements taking
part in the web 70 feed, as well as the cutter 25, are arranged to
feed the web, at least as far as the beginning of the spindle proper
24 (i e the beginning of its winding portion), at a suitable slight
radial distance from the winding 75 spindle and spindle bearings After
a blank of the required lengthl hlas been cut off by the cutter 25, it
is moved towards the spindle in the transverse direction, as indicated
by the arrows 20 80 As illustrated, a mechanically acting gripper 33
for effecting this transverse movement is mounted in front of the
spindle bearing 26 During the winding of a preceding sleeve, the blank
can be fed at least as far as 85 the beginning of the winding spindle
proper and, in some eases, even further After removal of the finished
sleeve, the blank is seized by the gripper 33 and introduced in the
transverse direction into the entry slots 90 31 It is thereupon drawn
forward in the axial direction of the spindle into the winding
position by a gripper 23 The amount of time required to move the blank
from the outer spindle bearing 26, or firom the end of 95 the spindle
journal 30, to the beginning of the winding spindle proper is saved.
The transverse gripper 33 may also be used for controlling the web and
neutralising undesired lateral displacement thereof Dis 100 placement
may occur if the reels from which the web is drawn off are badly wound
laterally, so that the edge of the blank is no longer introduced into
the entraining slot of the winding spindle or is introduced 105
excessively or irregularly As illustrated in Figure 2, the gripper 33
has an adjustable stop 34 which eoacts with a stop 35 whose position
in the path of the gripper 33 can he adjusted so that the amount of
the trans 110 verse movement of the latter can he suited to the
requirements for the time being.
Preferably and as illustrated, adjustment is effected by a hand wheel
36 However, it may be effected automatieally during opera 115 tion by
hydraulic or electrical means.
If vacuum is employed as the medium for the transverse movement in
some cases the entraining slot in the winding spindle may be made an
air slot connected to a source of 120 vacuum The transverse movement
of the blank may be effected after the blank has come to lie wholly in
the region of the spindle proper.
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* GB784835 (A)
Description: GB784835 (A) ? 1957-10-16
Improvements in or relating to apparatus for varying the speed of an endless
conveyor
Description of GB784835 (A)
PATENT SPECIFICATION 78
t Date of filing Complete Specification: Oct5, 1954.
Application Date: Oct 16, 1953 No 28648153.
Complete Specification Published: Oct 16 1957.
Index at Acceptance:-Classes 78 ( 1), A 1 D; and 130, C 1 (A 1: A 4:
01).
International Classification:-A 24 c B 65 g.
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus for Varying the Speed of an
Endless Conveyor.
We, NORMAN WALTER JACKSON, a British Subject, and MOLINS MACHINE
COMPANY LIMITED, a British Company, both of 2 Evelyn Street, Deptford,
London, S E 8, do hereby declare the invention, for which we pray that
a patent may be granted to us, and the method by which it is to be
performed, to be particularly described in and by the following
statement:-
This invention concerns improvements in or relating to apparatus for
varying the speed of an endless conveyor, e g a conveyor for a stream
of tobacco in a machine for the manufacture of mouthpiece cigarettes.
By the expression "mouthpiece cigarette" when used herein is meant a
cigarette in which a tobacco portion and a mouthpiece portion are
arranged within a common wrapper A mouthpiece portion may consist of a
piece of filtering material, or a hollow tube, or any other suitable
piece of material (including tobacco) which is different from the
tobacco contained in the remainder of the cigarette, or any
combination of the foregoing For convenience, any such mouthpiece
portions will hereinafter be referred to as "stubs".
One way of making mouthpiece cigarettes consists in feeding a
continuous unwrapped tobacco filler lengthwise and cutting it at
intervals into separate lengths, spacing the lengths apart, inserting
stubs into the spaces between tobacco lengths, and enclosing the
resulting composite filler in a paper wrapper to form a continuous
composite rod which is then cut at appropriate intervals to form
mouthpiece cigarettes It has been proposed, in order to space the cut
lengths of tobacco filler apart, to reduce temporarily the speed of
the conveyor carrying the continuous tobacco filler, each time a
length has been cut from the filler, while continuing lPrice 3 s 6 d l
to move the cut length forwardly at substantially the speed at which
the filler was moving before the conveyor speed was reduced.
According to the present invention there is provided apparatus for
varying the speed of a part of an endless flexible element, which part
is adapted to act as a conveyor, e.g for a stream of tobacco,
comprising a rotatable driving member to engage and drive said element
continuously and rotatable at a constant speed, a pair of guide
members (e g rollers) about which the element passes and so arranged
that a length of the element extends from one said member to the other
so as to be engaged by the driving member wherein said guide members
are arranged to be moved continuously in one direction and then
another so as alternately to increase and reduce the speed of the
remainder of the said element, including the said part, to speeds
above and below respectively the speed at which the driving member
drives the element, the said guide members being mounted on a pivoted
lever which is arranged to be rocked continuously by a cam, the
arrangement being such that the lever is moved about its pivot first
in one direction at a constant speed during the greater part of a
revolution of the cam and immediately thereafter in the opposite
direction at a constant speed during the remainder of said revolution.
Further according to the invention there is provided apparatus for
manufacturing mouthpiece cigarettes comprising an endless conveyor
band to convey endwise a stream of unwrapped tobacco, means to vary
the speed of the tobacco-conveying surface of said endless conveyor
band, said means comprising a rotatable driving member to engage and
drive said band continuously 1,835 60.
j 784,835 and rotatable at a constant speed, a pair of guide members
about which the band passes and so arranged that a length of the band
extends from one said member to the a other so as to be engaged by the
driving member, and means to move said guide members continuously in
one direction and then another so as alternately to increase and
reduce the speed of the remainder of I" the band, including the said
conveying surface, to speeds respectively above and below the speed at
which the driving member drives the band, the said guide members being
mounted on a pivoted lever which is arranged to be rocked continuously
by a cam, a further conveyor arranged to receive tobacco from the said
band and to move at substantially the greater of said speeds, cutting
means arranged periodically to cut the stream between the said band
and the said further conveyor whereafter the speed of the band is
reduced, whereby a portion cut from the stream is conveyed by the said
further conveyor at the said greater speed and a gap is thereby formed
between said portion and said stream, and means to insert stubs into
gaps so formed.
The said guide members may be mounted on a pivoted lever which is
arranged to be rocked continuously by a cam, the arrangement being
such that the lever is moved about its pivot first in one direction at
a constant speed and immediately thereafter in the opposite direction
at a constant speed.
Apparatus according to the invention will now be described by way of
example with reference to the drawing accompanying the Provisional
Specification, in which:-
Figure 1 is a front elevation, partly in section, of apparatus for
feeding lengths of tobacco and inserting stubs between them; Figure 2
is a sectional view of a detail; Figure 3 is a view, similar to Figure
2, of a modification; and Figure 4 is a diagrammatic view of mechanism
for varying the speed of the tobacco tape.
Referring to Figure 1, a tobacco stream ( is formed and fed forwardly
on a tape 1 which is arranged to be moved beneath a hopper (not shown)
through a trough la at varying speeds The stream passes through a
guide tube 2 and a further guide tube 3 on to a paper web 4 carried by
a tape 5.
The tobacco stream is severed at intervals by a knife 6 which
separates from the oncoming stream a length of tobacco which is on the
paper web 4.
cl O The variation of speed of the tape 1, which is effected by the
mechanism shown diagrammatically in Figure 4, is such that the speed
of the tape is greatly reduced immediately after each cutting
operation by a 5 the knife 6, so as to allow a space to develop
between the cut length, which is fed forwardly by the paper web, and
the leading end of the uncut stream Thereafter the speed of the tape 1
is increased to a speed such as to enable it to deliver the uncut 70
filler on to the paper web at substantially the speed of the paper web
4, and the uncut filler is thus fed on to the paper web at that speed
until the next cutting operation.
In order to vary the speed of the tape 1 75 in this manner, the tape
which is driven by a driving drum 21 (Figure 4), arranged to rotate at
a constant speed, passes over movable rollers 22 and 23 mounted to be
freely rotatable on a lever 24 which carries 80 an arm 25 on whose end
is mounted a camroller 26 The roller 26 is arranged to follow a crown
cam 27 which rotates in the direction indicated by the arrow and thus
causes the lever 24 to be rocked about its pivot 28 85 While the
roller 23 is moving upwardly and the roller 22 downwardly as viewed in
Figure 4, the tape 1 moves over the guide roller 29 and through the
trough la of the cigarette-machine hopper at a higher speed 90 than it
would have if the rollers 22 and 23 were stationary-that is, at a
higher speed than that at which the drum 21 drives the tape
Conversely, while the rollers 22 and 23 are moving in the opposite
direction the 95 tape moves through the trough at a lower speed than
the speed at which the drum 21 drives the tape As shown in Figure 4,
the shape of the cam 27 is such that as long as the cam is rotating,
the lever 24 is 100 continuously rocked first in one direction and
then in the other, and the roller 23 is caused to be moved upwardly at
a constant speed and then downwardly at a constant speed Thus (except
when the lever is about 105 to change its direction of movement) the
speed of the tape 1 through the trough la is always either greater or
less than the speed at which it would be driven if the rollers 22 and
23 were not moved The cam 110 27 is so shaped that the tape moves
through the trough at the higher speed for threequarters of a
revolution of the cam, and at the lower speed for the remaining
quarter revolution, the cam making one revolution 115 for each length
of tobacco cut off by the knife 6 The driving drum 21 is driven at
such a speed that when the roller 23 is moving upwardly the tape 1
moves through the trough la at such a speed (i e at the 120 faster
speed) as to cause tobacco to move from it on to the paper web 4 at
substantially the same speed as that of the paper web.
A roller 7, arranged to rotate as shown 125 by the arrow, and whose
peripheral speed is approximately the same as the speed of the paper
web, is arranged to engage the tobacco on the paper web in order to
control it and ensure that each cut length moves 130 Beyond the shoe
12 is a tongue 13, whose under-surface forms, in effect, a
continuation of the under-surface of the shoe 12 The tongue 13 is
similar to the usual tongue employed on a cigarette-making machine, 70
but is arranged at a smaller angle to the cigarette-paper web than is
usual so that at the entrance to the shoe, at the right-hand end of
the tongue as viewed in Figure 1, the inner surface of the tongue
which 75 engages the top surface of the stub is the same distance from
the paper web as is the under-surface of the shoe 12 Also, the tongue
13 extends further rearwardly than is usual, so as to continue to
press a 80 stub down on the paper as the stub passes from beneath the
shoe to the tongue.
A rotatable disc 14 is provided with two sets of fingers 15, 16 and 17
adapted to pass through a slot 18 in the tongue on rotation 85 of the
disc, and to enter tobacco passing through the tongue The disc is
arranged to rotate at a speed such that the fingers move through the
tongue faster than the paper web, and the parts are timed so that 90
the fingers enter the tongue so as to engage tobacco just behind a
stub, the disc being arranged to turn through one-half revolution for
each section of composite filler consisting of a tobacco length and a
stub which 95 passes The fingers effect a forward displacement of
tobacco behind the stub, which somewhat increases the amount of
tobacco immediately behind the stub and tends to ensure good abutment
between tobacco and 100 stubs The rearmost finger 17 of each group is
a little shorter than the fingers 15 and 16 so that it penetrates less
deeply into the tobacco and so effects a somewhat smaller displacement
of tobacco 105 Beyond the tongue shown in Figure 1 is folding
mechanism, not shown, which folds the paper web 4 about the stubs and
tobacco lengths, and pasting and sealing mechanism by which the paper
is sealed around the 110 tobacco and stubs to form a composite rod.
This passes to cut-off mechanism which cuts the composite rod at
appropriate intervals to form individual mouthpiece cigarettes.
It will be seen from the foregoing descrip 115 tion that from the
moment a stub is placed on the paper web by the stub-wheel 9, it is
continuously pressed against the paper web, first by the stub-wheel,
then by the shoe 12 and finally by the tongue 18 Thus the 120 stub has
little, if any opportunity to move lengthwise relatively to the paper
web, and therefore tends to remain in its correct longitudinal
position on the paper web It will also be seen that this control of
the 125 stubs continues without a break right up to the time when the
paper web is secured around the composite filler of stubs and tobacco
lengths.
Figure 3 illustrates a modification in which 130 forward bodily at the
speed of the paper web immediately it is cut, so as to counteract any
possible hold-up caused by the passage of the knife 6 through the
tobacco stream.
Beyond the roller 7 is a shoe 8 which also engages the tobacco to
control its height and protect it from damage when a stub is inserted
in front of its leading end, as will now be described.
1 f) A stub-wheel 9, which is similar to that described and shown in
the Complete Specification and drawing of British Patent
Specification No 709,197, and operates in the same manner, is arranged
to deposit stubs on the paper web in the spaces between successive
tobacco lengths The stubwheel is provided with three retractable
pushers 10, each of which in turn pushes a stub from the lowermost
flute of a fluted drum 11 which is rotatable intermittently in timed
relationship with the stub-wheel The stubs are carried downwardly by
the pushers and are delivered in turn on to the paper web 4, each
pusher being arranged to be retracted just after the stub has been
inserted in the space between two lengths of tobacco.
The stub-wheel is arranged to rotate at a speed such that stubs when
being inserted between tobacco lengths are given a faster forward
speed than the paper web and tobacco, in the manner described in the
Complete Specification of British Patent
Specification No 709,197.
The concave rim of the stub-wheel 9 presses each stub firmly against
the paper web immediately after it has been deposited thereon and this
ensures that it immediately travels forwardly with the paper web.
Just beyond the stub-wheel is a stationary shoe 12 which forms part of
control means for the stubs The shoe 12 has a smooth flat
under-surface which is arranged a distance above the paper web which
is a little less (e g half a millimetre less) than the diameter of a
stub The shoe extends up to the stub-wheel as shown, and each stub as
it is carried by the paper web away from the rim of the stub-wheel
passes immediately beneath the shoe and is pressed jo by the
under-surface of the shoe against the paper web This is illustrated
diagrammatically in Figure 2, in which a stub S is shown gripped
between the shoe 12 and the paper web 4 In Figure 2 in order to
illustrate the manner in which the stub is pressed against the paper
web by the shoe 12, the stub S is shown flattened at its upper part,
but it will be understood that, in practice, the pressure exerted on
the stub by the shoe 6 d and by the paper web 4 and the tape 5 and the
guide surface (not shown) on which the tape 5 runs, would probably
tend slightly to deform the stub temporarily as a whole rather than
merely to flatten its upper part 6 a as shown.
784,835 the shoe 12 a is arranged a little higher than is the shoe 12
previously described, but is provided on its under-surface with a pair
of ribs which are of semi-circular cross section and extend lengthwise
along the shoe.
These ribs engage the stub S and press it downwardly on the paper web
4 so as to control its position, in the same manner as does the flat
under-surface of the shoe 12 as described above.
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* GB784836 (A)
Description: GB784836 (A) ? 1957-10-16
Improvements in or relating to the manufacture of mouthpiece cigarettes
Description of GB784836 (A)
PATENT SPECIFICATlON
7845836
Date of filing Conplete Specification: Oct 18, 1964.
Application Date: Oct 29, 1 'i 53 No 29945/53.
Complete Specification Published: Oct 16, 1957.
Index at Acceptance:-Class 1 $ 0, CI(A 1: A 4: Cl).
International Classification:-A 24 c.
COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture of Mouthpiece
Cigarettes.
We, DESMOND WALTER MOLINS, a British Subject, and MOLINS MACHINE
COMPANY LIMITED, a British Company, both of 2 Evelyn Street, Deptford,
London, S E 8, do hereby declare the invention, for which we pray that
a patent may be granted to us, and the method by which it is to be
performed, to be particularly described in and by the following
statement:-
This invention concerns improvement in or relating to the manufacture
of mouthpiece cigarettes.
By the expression "mouthpiece cigarettes" when used herein is meant a
cigarette in which a tobacco portion and a mouthpiece portion are
arranged within a common wrapper A mouthpiece portion may consist of a
piece of filtering material, or a hollow tube, or any other suitable
piece of material (including tobacco) which is different from the
tobacco contained in the remainder of the cigarette, or any
combination of the foregoing For convenience, any such mouthpiece
portions will hereinafter be referred to as "stubs " One way of making
mouthpiece cigarettes consists in feeding a continuous unwrapped
tobacco filler lengthwise and cutting it at intervals into separate
lengths, spacing the lengths apart, inserting stubs into the spaces
between tobacco lengths, and enclosing the resultant composite filler
in a paper wrapper to form a continuous composite rod which is then
cut at appropriate intervals to form mouthpiece cigarettes One example
of a method of and apparatus for making mouthpiece cigarettes on this
Drinci Dle is disclosed in British Patent Specification No.
709,197.
When stubs are inserted between tobacco lengths as mentioned above, it
is sometimes difficult to avoid the occurrence of gaps between the
ends of the stubs and the ends of tobacco lengths This difficulty
arises in particular when the tobacco lengths between which the stubs
are inserted are already positioned on the paper web which is to be
wrapped around the stubs and tobacco to form a composite rod.
In the Complete Specification of British
Patent Applications Nos 13886/50 (Serial No 709,197) and 32695 (Serial
No 709,260), a method and apparatus are disclosed whereby successive
tobacco portions are spaced apart a distance no greater than the
length of the stub to be inserted between them, and this space is
temporarily enlarged by endwise pressure on one of the tobacco
portions so as to cause endwise contraction of the latter, so as to
facilitate insertion of the stub, which in the example described is
moved into the space at a faster forward speed than that of the
tobacco portions, so that the stub presses endwise against the rear
end of the preceding tobacco portion and thus enlarges the space In
Patent Specification No 709,260, claim is made to a method, in the
manufacture of mouthpiece cigarettes, of forming a space between the
ends of the two portions of unwrapped tobacco filler, enlarging said
space by endwise pressure on one of said portions so as to cause
endwise contraction of the said portion, and inserting a stub into the
space so enlarged.
According to the present invention there is provided in the
manufacture of mouthpiece cigarettes a method comprising the steps of
feeding forwardly successive lengths of unwrapped tobacco spaced apart
endwise, the space between two successive lengths being not greater
than (e g substantially the the same as, or less than) the length of a
stub to be inserted, enlarging said space 784,836 (e.g temporarily) by
causing the stub to press endwise on one of said tobacco lengths while
being inserted, and thereafter (e.g immediately after insertion of the
stub) causing the stub to move, relatively to the tobacco lengths,
towards the other said tobacco length.
The word "length" when used herein and in the appended claims in
relation to unwrapped tobacco (and when not qualified by the work
"severed") is to be understood as including not only a length which
has been separated from a continuous stream of tobacco by severance of
the latter, but also 1 the stream itself.
The stub may be inserted by being caused to move endwise into the
space with a faster forward speed than that 7 of the tobacco lengths
so as to press against the rear end 2 to of the tobacco length
preceding it, in which case the stub is thereafter (e g immediately
after insertion) caused to move at a slower speed than the tobacco
lengths, whereby it moves, relatively to the tobacco lengths to23
wards the tobacco length behind it.
The method may include pushing the stub endwise by a member moving at
the said faster forward speed to insert the stub, and then pressing
the stub by a member moving at the said slower forward speed so as to
retard the forward movement of the stub.
Further according to the invention there is provided in apparatus for
manufacturing mouthpiece cigarettes, means to feed forwardly an
unwrapped tobacco filler, means to sever the said filler, means to
move a severed length of the stream lengthwise away from the length
behind it by a distance such as to form between the two said lengths a
space no greater than (e g substantially the same as, or less than)
the length of a stub, means to move a stub endwise into said space
with a forward speed greater than that of the tobacco lengths and so
as to cause the stub to press endwise on one of the said tobacco
lengths, and means operable thereafter to retard the forward movement
of the stub so as to reduce its forward speed to a speed lower than
that of the tobacco lengths.
The apparatus may comprise means arranged to engage a stub and move it
into said space at a faster forward speed than that of the tobacco
lengths, and thereafter 5;i while engaging the stub to reduce the
forward speed of the latter below that of the tobacco lengths.
The said last named means may comprise an element arranged to engage
the rear end c. of a stub and to push it into said space at a faster
forward speed than that of the tobacco length, and a further element
arranged to engage the leading end of the said stub and to move, after
said stub has &-o been inserted in the said space, at a slower forward
speed than that of the tobacco lengths so as to reduce the speed of
the stub.
The said elements may be carried by a rotatable wheel which is
arranged to be 70 rotated at varying speeds Alternatively the said
elements may be carried by a wheel which rotates at a constant speed,
the elements being arranged to move at varying speeds, a Apparatus
according to the invention will now be described by way of example
with reference to the accompanying drawings, in which:Figure 1 is a
front elevation, partly in 30 section, of apparatus for feeding
lengths of tobacco and inserting stubs between them; Figure 2 is a
similar view of an alternative form of apparatus; and Figure 3 is an
end view taken on the line 85 III-III, Figure 2, some parts being
omitted.
Referring to Figure 1, a tobacco is formed and fed forwardly on a tape
1 which moves beneath a hopper (not shown) through a 90 trough la The
filler passes through a guide tube 2 and a further guide tube 3 on to
a paper web 4 carried by a tape 5 The tobacco filler is severed at
intervals by a rotating knife 6 which separates from the 95 oncoming
filler a length of tobacco which is on the paper web 4.
The tape 1, as described and illustrated in the Provisional
Specification and drawings of British Patent Application No 28648/53
to O (Serial No 784,835), is arranged to move at varying speeds The
arrangement is such that the filter is moved through the guide tubes
and on to the paper web at substantially thle speed of the paper web
until the 105 filler is cut, whereupon the speed of the tape 1 is
greatly reduced so as to enable a space, not greater than (e g
substantially the same as, or less than) the length of a stub, to be
developed between the cut 110 length (which is moving on the paper web
at the speed of the latter) and the uncut filler Thereafter the speed
of the tape 1 is increased again, so that the successive tobacco
lengths on the web 4 are spaced 115 apart by a distance not greater
than the length of a stub.
A roller 7, arranged to rotate as shown by the arrow, and whose
peripheral speed is approximately the same as the speed of the 1)0
paper web, is arranged to engage the tobacco on the paper web in order
to control it and ensure that each cut length moves forward bodily at
the sneed of the paper web immediately it is cut, so as to counter 125
act any possible hold-up caused by the passage of the knife 6 through
the tobacco stream Beyond the roller 7 is a shoe 8 which also engages
the tobacco to control its height and protect it from damage when 130
is such that a finger 17, positioned in front of a stub which has been
inserted in a space, moves forwardly a distance about two or three
millimetres less than the tobacco lengths and paper web during that
period 70 Consequently the stub during insertion is pushed by the
pusher 10 against the rear end of the preceding tobacco length and
compresses the tobacco endwise, thus enlarging the space to facilitate
entry of the 75 plug into the space After insertion, or after the
space has been enlarged as just explained to enable the stub to fit in
between the two tobacco lengths, the stub is retarded by the finger
17, and is thus caused to move, 80 relatively to the tobacco lengths
and the paper web, towards the leading end of the tobacco length
behind it The purpose of this is to close any gap which may exist
behind the stub as a result of the stub being 85 pushed against the
preceding length and the consequent enlargement of the space between
the tobacco lengths.
In the drawing a pusher 10 and finger 17 are shown in dotted lines at
the positions 90 they may conveniently occupy at the time when the
speed of the stub-wheel is reduced from the faster to the slower speed
At the position shown the pusher 10 is still being retracted, although
if desired the pusher 95 could be fully retracted before the speed
reduction occurs.
The speed of the stub-wheel is again increased after the finger 17 has
moved out of the path of the stubs and tobacco lengths, 100 and before
the next stub is pushed by the next pusher 10 into the next space
occurring between two tobacco lengths.
The variation of the speed of rotating of the stub-wheel can be
effected in any suit 10 able and convenient way For example, mechanism
such as that disclosed in the Complete Specification and drawings of
British Patent Application No 23074/50 (Serial No 703,991) may be
used, suitably 110 modified for the present purpose This mechanism
comprises a driving worm and a driven worm-wheel, the worm being
axially movable to and fro by a cam so as to cause alternate increases
and decreases in the 115 angular velocity of the worm-wheel.
Beyond the stub-wheel 9 is a shoe 22 which engages the upper surface
of the stub immediately the latter passes from the stubwheel, and
presses it against the paper web 120 4 This is in order to reduce the
risk of the stub moving longitudinally relatively to the paper web
after it has been positioned by the stub-wheel and the pusher 10 and
finger 17 The shoe is slotted at 23 to enable 125 the finger 17 to
pass through it.
The stubs and tobacco lengths pass from beneath the shoe 22 under a
tongue 24 which also presses the stubs against the paper web and
continues the control over the I 20 a stub is inserted in front of its
leading end.
A stub-wheel 9 which rotates in the direction indicated by the arrow,
is arranged to insert stubs into the spaces between successive tobacco
lengths The stub-wheel is provided with three retractable pushers 10
each of which in turn pushes a stub from the lowermost flute of a
fluted drum 11 which is rotatable intermittently in timed relationship
with the stub-wheel The stubs are carried down by the pushers and
delivered in turn on to the paper web 4, each pusher being arranged to
be retracted at a suitable time.
i 13 Each of the pushers 10 consists of one end of a lever 12 pivoted
at 13, and the other end of the lever carries a roller 14 arranged to
follow a fixed cam 15, being urged against the cam by a spring 16.
The stub-wheel is also provided with three retractable stub-retarding
fingers 17, each of which consists of one end of a lever 18 pivoted at
19 and having at its other end a roller 20 which follows the fixed cam
15, -'a being urged against the cam by a spring 21.
The arrangement of the levers 12 and 18 in relation to the fixed cam
15 is such that a pusher 10, which projects through an aperture in the
rim of the wheel 9 to engage a En stub in the lowermost flute of the
fluted drum 11, and to push the stub downwardly for delivery to the
paperweb, is retracted when it has completed the insertion of a stub
into the space between two lengths of tobacco; and a finger 17 is
retracted as it approaches the fluted drum 11 so as to avoid engaging
the rear end of a stub which is to be pushed out of the lowermost
flute by the pusher 10, but is thereafter caused to project through
the rim of the wheel so as to be positioned directly in front of the
leading end of that stub.
The stub-wheel 9 is arranged to be rotated at varying speeds such that
as a finger 10 is pushing a stub into a space between the two tobacco
lengths, the stub is caused to move at a faster forward speed than the
speed of the tobacco lengths and the paper web 4, and that when the
stub has been pushed into the space the speed of the wheel is reduced
so that the finger 17 in front of the stub moves with a forward s Deed
less than that of the tobacco and paper web To effect this, the wheel
is rotated alternately faster and slower, and as there are three sets
of fingers 10 and 17, it is necessary to reduce and increase the speed
of the wheel three times during each revolution.
The faster speed of the stub-wheel is such that a stub while being
inserted into the space between two tobacco lengths moves forwardly a
small distance, for example two or three millimetres, further than the
tobacco lengths and the paper web during that period The slower speed
of the wheel 781,z 36 longitudinal positioning of the stubs exercised
by the shoe 22.
Finally the paper web is folded and secured about the composite filler
of stubs and tobacco lengths, thus forming a composite rod, which is
then cut at appropriate intervals to produce mouthpiece cigarettes.
Referring now to Figures 2 and 3, these illustrate an alternative
stub-inserting apparatus according to the invention In this
construction stubs are taken from the fluted drum 11 by two pushers 30
on a wheel 31 and transferred from the wheel 31 to a delivery wheel 32
by which they are delivered on to the paper web 4.
The wheel 31 is fixed on a shaft 33 to which is also fixed a gear
wheel 34, which through gears 35 and 36 drives a gear 37 which is
fixed on a hub 38 of the delivery wheel 32, the hub 38 being fixed on
a shaft 39.
A finger carrier 40 comprises a short sleeve 41 which is rotatably
mounted on the hub 38, and a pair of projections 42 on each of which
is adjustably mounted a member 43 comprising two fingers 44 and The
member 43 is so shaped that the fingers extend partly across the
concave rim of the wheel 32, as seen in Figure 3.
Springs 46 (see Figure 2) are each attached at one end to a projection
42 and at the other end to the side of the wheel 32 These springs urge
the finger-carrier against the stops 47 on the side of the wheel 32
and thus cause it to rotate with the wheel, although it is at times
caused to rotate on the hub 38 so as to lag behind the wheel, as will
shortly be described.
Also formed on the carrier 40 are two projections 48, each of which is
provided with a cam face 49.
A ring 50, provided with two pins 51, is fixed on the hub of the gear
36 As the gears 36 and 37 rotate, each pin 51 in turn comes into
engagement with one of the cam faces 49 The position of the cam face
49 on the carrier 40, relative to that of the pin 51 on the ring 50,
is such that this engage ment first occurs between parts of the cam
face 49 and of the Din 51 which are unequal distances from their
respective centres of rotation, the contacting part of the cam face
being further from the centre of the shaft 39 than is the contacting
part of the pin 51 a from the centre of the shaft which carries the
gear 36 and ring 50 In consequence the contacting part of the cam face
49 is at that moment moving faster than the pin 51.
Accordingly the projection 48 is forced back (relatively to the wheel
32) by the pin 51, which rides over the cam face until the point of
contact is eaui-distant from both centres of rotation This is possible
because, as explained above, the carrier 40 is loose on o? the hub 38
and can be turned on the hub against the tension of the springs 46.
In Figure 2 the parts are shown in a position in which this rotation
of the carrier 40 has begun, the leading edge of the projections 42
having moved away from the 7 ' stops 47.
On further rotation of the gears 36 and 37 and the parts fixed
thereto, the Din 51 and cam face 49 move apart and the carrier is free
to be turned by the springs 4 r to its normal position with the
leading edges of the projections 42 against the stops 47.
The operation of the apparatus shown in Figures 2 and 3 is as follows
A tobacco stream is fed and severed in the same way St as has been
described with reference to Figure 1, and stubs are fed into the gaps
between successive lengths of tobacco by the fingers 44 and 45 on the
delivery wheel 32 The stubs are taken from the fluted drum 11 by the
pushers 30 on the wheel 31, which rotate as shown by the arrow, Figure
2, and each stub in turn is transferred from the wheel 31 to the
delivery wheel 32, being S"' received between the fingers 44 and 45 on
one of the members 43 It will be seen from Figure 2 that at a time
when a pair of fingers 44 and 45 is in position to receive a stub
pusher 30, the carrier 40 will be in its:+ 5 advanced position against
the stops 47 Thus.
at this time the fingers are moving at the same angular speed as the
delivery wheel 32, and they continue to move at this speed until a cam
face 49 engages a pin 51 When 1,0) this occurs, both pairs of fingers
are retarded relatively to the wheel 31, and this takes place at the
moment when the lowermost pair of fingers, as view in Figure 2, have
just delivered a stub on to the paper 14 5 web 4, between two tobacco
portions.
The wheel 32 rotates at such a speed that a stub delivered by the
fingers when they are moving at the same speed as the wheel, has a
faster forward speed than that of the t 10 paper web and the tobacco
thereon Thus as in the previous example the stub is pressed against
the rear end of the preceding tobacco length Immediately thereafter,
however, the cam face 49 on the upper 113 most projection 48 (as
viewed in Figure 2) engages a pin 51, and the finger-carrier is
thereby turned rearwardly on the hub 38, so that the stub which has
just been inserted but which is still controlled by the fingers 120 44
and 45, is caused to move at a slower speed which is slower than the
paper web.
Accordingly, the stub lags behind the preceding tobacco length and is
caused to move (relatively to the paper web and the tobacco) 123
towards the leading end of the tobacco length behind it.
On further rotation of the wheel, the fingers while still being
retarded, pass away from the stub, and subsequently the prc 1:-I
784,836 means to move a stub endwise into said space with a forward
speed greater than that of the tobacco lengths and so as to cause 60
the stub to press endwise on one of the said tobacco lengths, and
means operable thereafter to retard the forward movement of the stub
so as to reduce its forward speed lower than that of the tobacco
lengths 65
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* GB784837 (A)
Description: GB784837 (A) ? 1957-10-16
Improvements in or relating to apparatus in which a continuous length of
material iscut into separate lengths while being fed lengthwise
Description of GB784837 (A)
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The EPO does not accept any responsibility for the accuracy of data
and information originating from other authorities than the EPO; in
particular, the EPO does not guarantee that they are complete,
up-to-date or fit for specific purposes.
PATENT SPECIFICATION 784 q
Date of filing Complete Specification: Nov 23, 1954.
Application Date: Nov 26, 1953 Nl o 32875 /53.
Complete Specification Published: Oct 16, 1957.
Index at Acceptance:-Mlass 130, C 1 (A 1 A 4: al).
international Classification: A 24 c.
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus in which a Continuous Length
of i Material is Cut into Separate Lengths while being Fed Lengthwise.
We, NORMAN WALTER JACKSON, a British Subject, and MOLINS MACHINE
COMPANY LIMITED, a British Company, both of 2 Evelyn Street, Deptford,
London, S E 8, do hereby declare the invention for which we pray that
a patent may be granted to us, and the method by which it is to be
performed, to be particularly described in and by the following
statement:-
This invention concerns improvements in or relating to apparatus in
which a continuous length (e g stream) of material is cut into
separate lengths while being fed lengthwise Ona example of such
apparatus is a continuous rod cigarette-making machine for making
mouthpiece cigarettes, in which a continuous stream of unwrapped
tobacco is fed lengthwise and is cut at intervals to produce separate
lengths of tobacco which can be spaced apart endwise to enable
mouthpiece portions to be inserted between them, and a continuous
tobacco filler, consisting of tobacco lengths and mouthpiece portions
in alternation, can thus be formed.
One such example is disclosed in the Complete Specification and
drawings of British
Patent Application No 13886/50 (Serial No.
709,197), and a further example in the Complete Specification and
drawings of
British Patent Application No 28648/53 (Serial No 784,835).
In those constructions a stream of unwrapped tobacco is severed at
intervals by a narrow knife blade which cuts across the tobacco stream
The knife blade is mounted on a rotating knife holder and cuts the
stream once during each revolution of the knife-holder Thus if the
knife is arranged with its cutting part at a conveniently short
distance from its axis of rotation, its speed in passing through the
stream may be less rapid than is desirable in order to make a lPricr
clean, square cut and to avoid holding up the moving stream, or the
length cut from it, by the blade passing through the tobacco.
According to the present invention there is provided apparatus in
which a continuous length of material is cut into separate lengths
while being fed lengthwise (e g apparatus for making mouthpiece
cigarettes, in which a stream of unwrapped tobacco is cut into
lengths) comprising cutting means to cut the continuous length of
material at desired intervals, the said means comprising a rotatable
fly knife carried by a carrier which is arranged to move back and
forth so as to carry the rotating knife bodily to and from a cutting
position at which it can cut the said continuous length, the knife
being arranged to rotate through more than one complete revolution
during each bodily movement to and from said cutting position.
The expression "continuous length of material" as used herein is to be
understood as including any continuous length of material adapted to
be cut into separate lengths while moving lengthwise One example of
such a continuous length is a continuous stream of unwrapped tobacco
as referred to above A further example is a continuous cigarette rod
formed on a cigarette-making machine while a still further example is
a composite rod consisting of lengths of tobacco and mouthpiece
material in alternation.
By the expression "fly knife" as used herein is meant a rotatable
knife having a cutting edge which is so arranged that, at the time of
cutting, the edge extends across an arc described about the axis of
rotation of the knife, so as to be capable on rotation of cutting
through a body located on the said arc so as to intercept the edge.
The apparatus may comprise a rotatable B 37 8 o 784,837 driving member
and a driving connection between said driving member and said knife
whereby the latter is rotated at a greater angular speed than that of
the driving member, the said carrier being arranged for bodily
swinging movement to and from said cutting position, and connected to
said driving member so as to be swung in timed relationship with the
rotation of said driving member.
The said driving connection may comprise a driven member carried by
said carrier and rotatable with said knife, and a further rotatable
member arranged to drive said driven member and about whose axis the
said carrier and driven member are arranged to swing to and fro, the
said further rotatable member being arranged to be rotated by said
rotatable driving member.
The knife may be connected to said rotatable driving member by linkage
connecting the latter to said carrier The said linkage may comprise a
crank on said driving member and a link connecting said crank to said
carrier whereby the latter is caused to swing to and fro through a
complete cycle during each revolution of said driving member.
Further according to the invention there is provided cutting mechanism
comprising a rotatable fly knife, a rotatable driving member, gearing
connecting said driving member to said knife to cause the latter to
rotate at a greater angular speed than that of the said driving
member, said gearing including a driven gear rotatable with said knife
and a further gear in driving engagement with said driven gear and
about whose axis of rotation the said driven gear and said knife are
arranged for bodily swinging movement so as to cause the knife to
swing to and away from a cutting position, and to cause the said
driven gear to roll to and fro on said further gear, and linkage
connecting said driving member to said knife and driven gear so as to
cause the knife and driven gear to be swung about said axis in timed
relationship with the rotation of said driving member.
The said linkage may comprise a crank on said driving member and a
link connecting said driving member to a swinging part in which said
knife and driven gear are rotatably mounted.
As the knife and the driven gear which rotates therewith are bodily
swingable about the axis of rotation of a further gear which drives
the driven gear, the speeed of rotation of the knife wilr vary since
the driven gear d O will roll on the said further gear first in one
direction and then in the other as it swings to, and fro For this
reason the angular speed of the knife is not in a fixed ratio to that
of the rotatable driving member, but is nevertheless at all times
determined by the angular speed of the driving member As it is desired
to cause the knife to rotate at a relatively high speed, the mechanism
is preferably arranged so that the cutting occurs at a time when the
driven gear is being swung 70 in opposition to the direction of
rotation of the said further gear which drives it, so that the knife
is at the moment of cutting rotating at its maximum speed.
Apparatus according to the invention will 75 now be described by way
of example with reference to the accompanying drawings in which:Figure
1 is a side elevation of apparatus for making mouthpiece cigarettes,
in which 80 a continuous stream of tobacco is cut at intervals and
stubs are inserted between cut lengths of tobacco; Figure 2 is a
sectional side view of cutting apparatus; 85 Figure 3 is a view taken
on the line Ill-III in Figure 2; and Figure 4 is a side elevation of
some of the apparatus shown in Figure 2.
Referring first to Figure 1, the apparatus 90 illustrated comprises a
tobacco tape 1 arranged to be moved beneath a hopper (not shown)
through a trough 1 a at varying speeds A guide tube 2 and a further
guide tube 3 are provided to receive a tobacco ' 3 stream from the
tape 1 and guide it on to a paper web 4 carried by a tape 5 Cutting
-mechanisms, which will shortly be described, is provided in order to
cut the stream at intervals between the tubes 2 and 3 10 t) The
variation of the speed of the tape 1 is effected in any convenient
way, preferably by means of the mechanism for this purpose described
and shown in the Complete Specification and drawings of British Patent
105
Application No 28648/53 (Serial No.
784,835) The speed variation is such that the speed of the tape is
greatly reduced immediately after each cutting operation so as to
allow a space to develop between the 110 cut length, which is fed
forwardly by the paper web, and the leading end of the uncut stream
Thereafter the speed of the tape I is increased to a speed such as to
enable it to deliver the uncut filler on to the paper 115 web at
substantially the speed of the web 4, and the uncut filler is thus fed
on to the paper web at that speed until the next cutting operation.
The cutting mechanism, illustrated in out 120 line in dotted lines in
Figure 1, is best shown in Figures 2, 3 and 4 It comprises a rotatable
knife carrier 6 in which is clamped a thin, narrow knife blade 7
adapted to pass through the space between the tubes 2 and 125 3.
The carrier 6 is fixed at one end of a shaft 8 which is rotatable in
bearings 9 mounted in a swingable bracket 10 At the other end of the
shaft 8 is fixed a gear II 130 784,837 having 22 teeth, which gear
meshes with, and is arranged to be driven by, a further gear 12 which
has 60 teeth.
The gear 12 is formed on a sleeve 13 on which is also formed a gear 14
which has 30 teeth The gear 14 meshes with, and is driven by a main
driving gear 15 fixed on the end of a driving shaft 16 The gear 15 has
55 teeth.
This the angular speed of the gear 15 relatively to the gear 11, and
to the knife carrier 6, is 1 to 5.
The swingable bracket 10 which carries the shaft 8 is arranged to
swing about a fixed shaft 17 The sleeve 13 with gears 12 and 14 is
also freely rotatable in bearing 18 about the shaft 17 Thus the knife
carrier 6 is bodily swingable, with the bracket 10, about the axis of
rotation of the gear 12 which drives the gear 11 to rotate the knife
carrier.
The main driving gear 15 has fixed to it a crank disc 19 which has
formed on it an eccentric boss 20 on which is pivoted a link 21 The
bracket 10 has an extension 22, whose shape can best be seen from
Figures 3 and 4, and the link 21 is pivoted to this extension so as to
provide a linkage connecting the driving gear 15 to the knife carrier
6 and driven gear 11 In Figure 3 is shown, in dot and dash line marked
P the circular path of the eccentric boss 20 on rotation of the gear
15 As will be seen, this arrangement causes the bracket 10 to swing to
and fro about the shaft 17 once during each revolution of the gear 15,
during which period of course the driven gear 11 and knife carrier 6
turn through five revolutions.
The throw of the crank 20 and the linkage between it and the bracket
10 is such that the knife 7 is caused to pass between -the guide tubes
2 and 3 only once during each revolution of the gear 15, although
during this period the knife carrier rotates through five revolutions.
For convenience of illustration the angular position of the knife 7 as
shown in Figure 3 is 90 different from that in which the knife is
shown in Figure 2, while in Figure 1 in order to show the knife in
full lines it has been illustrated in a still different position.
The purpose of the arrangement just described is to cause the knife 7
to rotate at a high speed so as to pass rapidly through the -55 stream
of tobacco moving through the guide tubes 2 and 3 As the knife is
brought into a cutting position only once during each revolution of
the gear 15 and driving shaft 16, the interval -between successive
cuts is determined by -the speed of rotation of the shaft 16.
The knife 7 constitutes a fly knife as hereinbefore defined That is to
say, an arc can be described about the axis of the shaft -05 8, across
which arc the leading or cutting edge 7 a of the knife 7 will extend
at the time of cutting When the knife is swung into cutting position,
this arc will intersect the axis of the guide tubes 2 and 3, and the
tobacco stream passing through the tubes 70 will therefore be located
on the arc so as to intercept the cutting edge 7 a of the rotating
knife, which can therefore cut through the stream.
The swinging of the bracket 10 about the 75 shaft 17 causes gear 11 to
roll on the gear 12.
Accordingly the speed of rotation of the gear 11 and the knife carrier
6 varies according to the direction in which they are swinging with
the bracket 10 As the purpose 80 of this apparatus is to increase the
cutting speed of the knife, the mechanism is accordingly so arranged
and timed that the knife 7 passes between the tubes 2 and 3, to cut
the tobacco stream, at an instant just after 85 the bracket 10 has
completed its swing in a direction towards the guide tubes (i e
towards the right in Figure 3) and has started to swing in the reverse
direction In this reverse direction (i e towards the left in 90 Figure
3) the rolling of the gear 11 over the gear 12 is opposed to the
direction of rotation of the gear 12, and thus the gear 11 is rotated
at a faster speed than would be the case if the bracket 10 were
stationary Thus 95 in the arrangement described and shown, at the
moment when the knife cuts the stream, the gear 11 and knife carrier 6
are rotating at a speed in the region of six times the speed of
rotation of the gear 15 and main 100 driving shaft 16.
It will be appreciated that in a case where a knife is arranged to cut
the tobacco stream once during each revolution of its carrier, in
order to enable the knife to move, during 105 cutting, at anything
approaching the speed of the knife 7 in the arrangement just
described, it would be necessary to mount it at an inconveniently
great distance from its axis of rotation 110 As both the rotation and
the swinging of the knife carrier 6 are controlled by the driving
shaft 16, the timing of the cutter for different lengths which it may
be desired to cut from the stream is easily adjusted by 115 varying
the speed of rotation of the shaft 16.
The remaining parts of the apparatus shown in Figure 1 will be briefly
described, since they concern the insertion of stubs into 120 spaces
between cut lengths of tobacco and as such -form no part of the
present invention.
This mechanism comprises a stub-wheel 23 mounted for rotation, in the
direction 125 shown -by the arrow, on a shaft 24 (see also Figure 2)
The stub-wheel 23 is -formed as a disc having a concave rim as
indicated at 25, and provided with three projecting pusher-pins 26
Above the wheel 23 is a 130 stub-feeding device (not shown) comprising
a fluted drum by which double-length stubs are intermittently fed down
in succession to a position to be engaged by each of the pins 26 in
turn The stub-feeding device is preferably the one described and shown
in the Complete Specification and drawings of
British Patent Application No 1873/54 (Serial No 770,173) An arcuate
guide 27 I is provided to guide stubs and prevent them fromn falling
away from the rim of the wheel 23 until they reach a position at which
they are to be deposited on the paper web 4.
The wheel 23 is driven by a chain 28 passing over a sprocket 29 fixed
to the wheel.
The chain 28 is driven by a sprocket 30, which has fixed to it a gear
wheel 31 which meshes with a driving gear 32 fixed on a driving shaft
33 which rotates in the direction indicated by the arrow The sprocket
and gear 31 are mounted in a bracket 34 which is freely pivoted about
the shaft 33.
Also mounted on the bracket 34 is a camfollowing roller 35, which is
capable of en23 gaging a camn consisting of a rotatable eccentric disc
36 A spring 37 fixed on the bracket 34 urges the bracket about its
pivot so as to press the cam-follower 35 against the rim of the
eccentric disc 36 It should be noted here that the eccentricity of the
disc 36 is very small and cannot easily be perceived in the drawing.
The chain 28 also passes over a guide sprocket 38 mounted on a pivoted
arm 39 which is urged about its pivot in a clockwise direction by a
spring 401, so as to cause the chain to be kept tight.
The cam disc 36 is arranged to cause the bracket 34 to swing slightly
to and fro about the shaft 33 three times during each revolution of
the wheel 23 When the bracket 34 swings clockwise, as viewed in Figure
1, the sprocket 30, being carried towards the left in the Figure,
imparts a small increment to the speed of the chain 28 in excess of
that given to the chain by rotation of the sprocket 30.
On the return swing the speed of the chain is correspondingly slightly
reduced These swinging movements are so timed as to 6 o cause wheel 23
to move at the faster speed as a pin 26 is approaching the paper web 4
and pushing a stub into a space between a cut tobacco length and the
uncut tobacco stream Immediately thereafter the return Ha swing of the
bracket 34 causes the wheel 23 to slow down so that the pin 26 moves
with a forward speed approximately that of the paper web.
The driven gear 31 rotates at two-thirds the angular speed of the
driving gear 32 and at twice the angular speed of the sprocket 29 and
wheel 23 Thus the wheel 23 makes one revolution during every three
revolutions of the driving shaft 33.
A tobacco-engaging element 40 with a serrated end 41 is pivoted at 42
on an arm 43 and is also pivoted at 44 on a crank disc 45, by which
its serrated end is caused to move into and out of the path of tobacco
lengths and stubs on the paper web, follow 7 K ing the path indicated
in dot-and-dash lines, and travelling towards the left, in Figure 1.
when moving in its lower path The element performs this movement three
times during each revolution of the stub-wheel 23 75 and is timed and
arranged to engage tobacco immediately behind each stub inserted by
the stub-wheel, and to move at approximately the speed of the paper
web 4 while so engaging tobacco To engage the tobacco it passes
through a slot 46 in a tongue 47.
The apparatus as a whole operates as follows The tape 1 carries a
continuous stream of tobacco and delivers it through the guide tubes 2
and 3 on to the paper web 4 S.
Periodically the speed of the tape 1 is temporarily greatly reduced
and just before each such speed reduction the knife 7 is caused to
pass between the two guide tubes so as to cut the stream The cut
length con:,, tinues to move with the paper web, while the uncut
stream lags behind until the speed of the tape 1 is again increased By
that time a space has been developed between the cut length and the
leading end of the uncut ' stream A double-length stub is inserted
into this space by a pusher pin 26 on the stulb-wheel 23, which moves
at varying speeds so that the stub is pushed into the space with a
faster forward speed than that 1 o, of the paper web and the tobacco
carried thereby, and immediately thereafter the wheel slows down
slightly so that the pusher pin moves with a forward speed
approximately the same as the paper speed As the lo 10 tobacco and
stubs pass beneath the tongue 47 the element 40 engages the tobacco
immediately behind the stub and moves forwardly with it at
approximately the speed of the paper web, thus controlling the tobacco
11 " speed and preventing it from lagging behind the stub.
Subsequently the paper web 4 is wrapped and secured about the tobacco
and stubs to form a continuous composite rod, which is 115 cut at
appropriate intervals to produce mouthpiece cigarettes.
The lengths of tobacco cut from the tobacco stream are each double the
length required in the tobacco portion of a mouth 12 G piece
cigarette, and thus the composite rod is cut midway through each
tobacco portion and through each double-length stub.
The timing of the cutting mechanism and the timing of the means to
vary the speed of 1 25 the tape 1 are of course correlated according
to the intervals at which it is desired to cut the stream, which
depends upon the size of cigarette to be made It will be seen, also.
that the speed of rotation of the stub-wheel 130 784,837 knife, a
rotatable drivinpg member, gearing connecting said driving member to
said knife to cause the latter to rotate at a greater 60 angular speed
than that of the said driving member, said gearing including a driven
gear rotatable with said knife and a further gear in driving
engagement with said driven gear and about whose axis of rotation the
said 65 driven gear and said knife are arranged for bodily swinging
movement so as to cause the knife to swing to and away from a cutting
position, and to cause the said driven gear to roll to and fro on said
further gear, and 70 linkage connecting said driving member to said
knife and driven gear so as to cause the knife and driven gear to be
swung about said axis in timed relationship with the rotation of said
driving member 75
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