Method of dispensing viscous material

A reciprocating piston 140 with an integral valve 138 moves in a dispensing direction within a cylinder 86 to pressurise viscous material contained therein, such as ice cream or the like, thereby pushing it out of a dispensing nozzle 188 located at one end of the cylinder while simultaneously extrac...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT T TOPPER, JOHN W GILLIOM, JAMES M TUCKER
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BOTTLES, JARS OR SIMILAR CONTAINERS CHEWING GUM COCOA COCOA PRODUCTS, e.g. CHOCOLATE CONFECTIONERY DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISEPROVIDED FOR FOODS OR FOODSTUFFS HUMAN NECESSITIES ICE-CREAM LIQUID HANDLING OPENING, CLOSING PERFORMING OPERATIONS PREPARATION THEREOF SPRAYING OR ATOMISING IN GENERAL SUBSTITUTES FOR COCOA OR COCOA PRODUCTS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING
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Beschreibung
Zusammenfassung:	A reciprocating piston 140 with an integral valve 138 moves in a dispensing direction within a cylinder 86 to pressurise viscous material contained therein, such as ice cream or the like, thereby pushing it out of a dispensing nozzle 188 located at one end of the cylinder while simultaneously extracting viscous material from a collapsible container 40 into the other end of the cylinder by suctioning the material from the container. When the piston moves in a reverse direction, the integral valve opens to allow the piston to pass through the previously suctioned viscous material then within the cylinder. The dispensing nozzle includes a normally closed, spring-biased valve 190 opened by the force of the pressurized material, closing of the valve being assisted by a transient suction force occurring as the valved piston begins to move in the reverse direction through the material.