L-4 (Stitches & Seams)

7/29/2019 L-4 (Stitches & Seams)

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WHAT IS A STITCH?

One unit of confirmation resulting from one or more strands or loops of

thread inter looping or passing into or through materialis called STITCH

How is a Stitch formed?The formation of a stitch begins when the needle penetrates the fabric anddescends to its lowest point. The bobbin hook then slides by the needle's scarf,catching the upper thread and carries it around the bobbin and bobbin thread. Thethread is then pulled up into the fabric, completing the stitch.

STITCHINGconsists of a series of stitches used to decorative stitch or hem a

single ply of fabric.
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STITCHES

LOCK STITCH FORMATION

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STITCH

LOCK STITCH

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STITCH PROPERTIES

Stitch Size (Length, Width, Depth)

Stitch Length (spi)

Stitch Width (Single Horizontal Span (Bight) )

Stitch Depth (Distance b/w the upper and lower surface ofthe stitch)

Thread Tension

Stitches Consistency
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STITCH PROPERTIES

Class 100 Chain Stitch

Class 200 Hand Stitch

Class 300 Lock Stitch

Class 400 Multithread Chain Stitch

Class 500 Overedge Stitch

Class 600 Cover Stitch


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STITCH TYPESCLASS 100

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WHAT IS A SEAM?

A seam is a joint consists of series of stitches used to jointwo or more plies of fabric together.


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SEAM DIMENSIONS

Seam Length

Seam Width

Seam Allowance

Seam Heading

Seam Depth


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SEAM TYPESSuperimposed Seam (SS)

Fabric plies stacked on top of one another with edges evenlike a book with stitch near edge

Characteristics:

57 different seam types

Used in major structural seams and many minor detail seams


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SEAM TYPESLapped Seam (LS)

Overlapped seam allowances of two or more plies sewn togetherwith the plies extending in opposite directions


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SEAM TYPESLapped Seam (LS)

Overlapped seam allowances of two or more plies sewn togetherwith the plies extending in opposite directions

Characteristics

102 different seam types, largest seam class

More casual in appearance because some type of top stitching is always used

Attach waistline of underwear and sports wear for less bulk

Used to attach front bands of shirts, setting pockets, side seams of quality dress shirts,

outer leg seams of jeans

Sewn with lockstitch or chain stitch, but never an over edge stitch


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SEAM TYPESBound Seam (BS)

Fabric binding strips sewn to enclose raw edges.


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SEAM TYPESBound Seam (BS)

Fabric binding strips sewn to enclose raw edges.

Characteristics 18 seam types

Not used for structural seams

Attachment on the sewing machine used to sew seam

Used on edges of short sleeve on some t-shirts and necklines

Sewn with lockstitch, chain stitch, or cover stitch

Never sewn with over edge stitch

Found only on edges


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SEAM TYPESFlat Seam (FS)

Fabric plies whose raw edges are abutted, but not Over

lapped and sewn together.


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SEAM TYPESFlat Seam (FS)

Fabric plies whose raw edges are abutted, but not Over

lapped and sewn together.

Characteristics:

6 seam types

Usually a cover stitch is used

Appears similar on both sides

Used in sweat shirts, lingerie, and long underwear


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SEAM USES

Documents

L-4 (Stitches & Seams)