Valve unit

Details Valve unit Valve unit

1989-03-29

1989-10-31

Shaver, Kevin P.

Dispensing

Outlet element operated by pressure of contents

Spring form, resilient or compressible flow controller or...

222571, 1375123, 141117, 141302, B67D 572

Patent

active

048771600

ABSTRACT:
A valve unit to be used in a packing machine of the type which manufactures filled and sealed non-returnable packages for dairy products such as milk, yogurt and the like from prefabricated blanks. The packages are filled one at a time by a metering pump and the liquid is fed from the pump to the package via the valve unit. The valve unit includes a check valve and a flexible nozzle which co-operate so as to prevent any after-dripping between pumping strokes. This is achieved in that the check valve with the help of a piston component, after the completed pumping stroke, creates a vacuum in the liquid filled valve unit. This vacuum affects the flexible nozzle so that it closes rapidly and effectively.

REFERENCES:
patent: 591067 (1897-10-01), Wallace
patent: 1596520 (1926-08-01), Eskholme et al.
patent: 1947535 (1934-02-01), Schmidt
patent: 2373555 (1945-04-01), Folke
patent: 2929416 (1960-03-01), Farber
patent: 3258175 (1966-06-01), Taylor
patent: 3895748 (1975-07-01), Klingenberg
patent: 4139124 (1979-02-01), Ferrante
patent: 4410108 (1983-10-01), Minard

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