Viscous material dispenser and method for dispensing

Details Viscous material dispenser and method for dispensing Viscous material dispenser and method for dispensing

A - Human Necessities

23

G

A23G 9/28 (2006.01) B67D 7/02 (2010.01) B05C 17/005 (2006.01) B67D 1/10 (2006.01) F16K 17/04 (2006.01)

Patent

CA 2244019

A reciprocating piston with an integral valve moves in a first direction within a cylinder to pressurize viscous material contained therein, such as ice cream or the like, thereby pushing it out of a dispensing nozzle located at one end of the cylinder while simultaneously extracting viscous material from a collapsible container into the other end of the cylinder by suctioning the material from the container. When the piston moves in a second 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 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 second direction through the material. Suctioning the material from the collapsible container, as opposed to compressing the container to expel the material, is preferable when the material contains entrapped gas, as is the case with ice cream, since repeated compression of such containerized material can diminish its quality.

Un piston alternatif à soupape intégrée se déplace dans un premier sens à l'intérieur d'un cylindre pour refouler une matière visqueuse telle que crème glacée ou matière analogue vers une buse de distribution montée à un bout dudit cylindre tout en aspirant de la matière visqueuse contenue dans un contenant souple dans l'autre extrémité du cylindre. Lorsque le piston se déplace dans un second sens, la soupape y intégrée s'ouvre pour permettre au piston de traverser la masse de matière visqueuse précédemment aspirée dans le cylindre. La buse de distribution comprend un clapet normalement fermé par un ressort qui s'ouvre sous la pression de la matière pompée, la refermeture du clapet étant aidée par la force du succion transitoire générée au retour du piston dans le second sens à travers la matière visqueuse. L'aspiration de la matière contenue dans le contenant souple est à privilégier au lieu de la compression dudit contenant lorsque la matière renferme des gaz piégés comme c'est le cas avec de la crème glacée, puisque la compression répétée d'une telle matière peut en altérer la qualité.

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