Two-chamber compressed-gas pack

Details Two-chamber compressed-gas pack Two-chamber compressed-gas pack

1990-05-21

1991-08-06

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

156 69, 53470, 413 2, 493 87, B65B 700

Patent

active

050373676

ABSTRACT:
In twin-chamber compressed gas packs, the collar of a diaphragm which invaginates during motion in the container is secured with its opening region in a fold or in the upper part of the container, in order to provide the required sealing between product chamber and working fluid chamber. The disadvantage of packs of this type is that the use of multipart containers is mandatory and/or that a support ring incorporated in the diaphragm produces a frictional force which may be large enough to prevent ejection of the feed material because of an insufficient pressure differential between the chambers. These drawbacks are overcome by securing the entire region of the collar to the internal wall of the casing.

REFERENCES:
patent: 3415425 (1968-12-01), Knight et al.
patent: 3548564 (1970-12-01), Bruce et al.
patent: 3620420 (1971-11-01), Normos
patent: 4087026 (1978-05-01), Petterson
patent: 4089443 (1978-05-01), Zrinyi
patent: 4185758 (1980-01-01), Giggard
patent: 4687462 (1987-08-01), Rewitzer

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