New Patents V

posed adjacent the backside of a mold surface for controlling the temperature over respective first and second areas of the mold surface. The waste area elimination is accomplished by isolating and insulating the section of the mold defining the waste area. A kerfis cut into the mold around the waste area to isolate the area. The kerf is fil- led with castable silicone to insulate the waste area from the heated segments of the mold. To obtain the coating, the mold is filled with pow- dered vinyl and the excess material is removed from the mold by dumping the plastisol from the mold into a return tank.

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PROCESS FOR PREPACKING FRESH MEAT

Chin Cheng assigned to Wilson Foods Corpora- tion

A process for prepacking fresh meat to enhance and improve the consistency of its quality at the point of retail sale, and to increase the shelf life of the meat, such process including the steps of treating the meat with an aqueous solution con- taining three active components, and then pack- aging the meat in a controlled gaseous atmosphere containing from about 20 to about 80 percent carbon dioxide, and from about 2 to about 30 percent oxygen, with the balance being nitrogen. The solutions active components in- clude certain phosphate compounds and a reducing agent which is selected from the group consisting of ascorbic acid, isoascorbic acid, or the sodium and potassium salts of these acids, and reductic acid. The third ingredient is either citric acid or tartaric acid, or ethylenediaminetetracetic acid, or an alkali metal salt thereof, functioning as a sequestering agent.

4683990

R E L A T I V E P O S I T I O N M O N I T O R I N G A P P A R A T U S

Mark Wright assigned to Innovation Industries Inc

A relative position derivation, sensing and in- dicator system primarily adapted for conven- tional elevators. The system displays elevator position and travel direction at each floor with a relatively old fashioned appearing indicator ap- paratus including an £37 ant ique+ 38 + 0 face-

plate and a simple rotatable pointer arm driven by a stepper motor assembly. Electronic solid state digital circuitry is employed to derive suitable control signals for driving the associated stepper motors which rotate the pointer arms as- sociated with each position displayed. A plurality of vanes vertically aligned within the hoistway are provided with parallel, offset rows of perforations. A generally U-shaped vane reader traveling with the elevator car establishes a pair of rapidly pulsed, oppositely directed in- frared light beams across a void-like channel for- med between its sides. Suitable photoresponsive elements in the vane reader may receive and interpret the light pulses to sense the presence or absence of interposed vanes (and vane perfora- tions) to derive digital data during car move- ment. Correlation means in the vane reader are provided to output two pairs of control signals, which are delivered to an associated drive circuit for correlating and generating a pair of comple- mentary clock signals and a pair of comple- mentary direction signals. A stepper motor processor correlates and processes the last men- tioned signals for ultimately controlling as- sociated stepper motor actuation circuits associated with the multiple stepper motors em- ployed in conjunction with the indicator ap- paratus disposed at each floor. + RE

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W A S H I N G M A C H I N E F L U I D D I S C H A R G E M O N I T O R I N G U N I T

Joseph A Gentiluomo

An apparatus for monitoring the level of water being pumped into kitchen sinks, laundry tubs, and standpipes. The apparatus features a novel fluid levels ending unit operatively connected to a novel control unit for providing maintained termination of electrical power to the pump motor, should the water drainage system become clogged. As water flows through the nozzle of the sending unit, it operates to seal off the nozzle£3 s air chamber inlet to trap and contain air therein. Therefore, should the drainage system become clogged, back-up water rises to a predetermined height within the air chamber. In so doing, the trapped air within the air chamber becomes com- pressed to a predetermined small value, for ac- tuating the pressure switch. The actuated pressure switch in turn provides an electrical signal to the control unit for termination of water pump action. + RE