Device for the use of a thin wall package

Details Device for the use of a thin wall package Device for the use of a thin wall package

1997-12-23

2000-12-12

Kaufman, Joseph A.

Dispensing

Collapsible wall-type container

With wall-collapsing means

222105, 222137, 2221453, 2221456, 222327, 222387, B65D 3528

Patent

active

061586218

ABSTRACT:
The cartridge assembly for dispensing at least one component comprises a cartridge having a rigid cartridge cylinder, a package assembly having a membrane containing liquid chemical, the membrane having a closed inlet end and an outlet end and a piston assembly disposed in said cartridge assembly. The piston side end of the inner wall of the cartridge cylinder and the front of said piston assembly are formed thus that the membrane is turned outside-in within itself by the action of the piston provided with a sealing lip such that the inner surfaces of the turned outside-in wall portions of the membrane are sliding relative to each other during emptying of the package, sealing the gap betweeen the double walls. Such a device requires considerably less dispensing force which is important particularly for a hand driven apparatus, and allows an efficient sealing of the liquid while dispensing.

REFERENCES:
patent: 4972969 (1990-11-01), Randklev
patent: 5332122 (1994-07-01), Herold et al.
patent: 5647510 (1997-07-01), Keller
patent: 5667102 (1997-09-01), Keller
patent: 5697524 (1997-12-01), Sedlmeier
patent: 5699935 (1997-12-01), Stahley

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