Overpressure valve for packaging containers

Details Overpressure valve for packaging containers Overpressure valve for packaging containers

1992-01-13

1993-11-23

Shoap, Allan N.

Flexible bags

With venting or ventilation means

Opening in bag material

426118, B65D 3301

Patent

active

052637778

ABSTRACT:
An overpressure valve for a packaging container, which prevents air from the atmosphere from getting into the package and, in the case of gas-emitting material being packaged, reduces a resultant overpressure by venting gas. The overpressure includes a valve membrane stuck to a wall of the container on top of through holes. The membrane is secured to the wall with peripheral adhesive strips, leaving an adhesive-free zone above the through holes; the adhesive-free zone forms a valve member, and the congruent part of the wall forms a valve seat. The adhesive strips have a wedge shape, so that the transitional regions of the adhesive-free zone toward the adhesive strips, rest on the wall, and the raised peripheral regions form spacers for adjacent packages to permit operation of the overpressure valve while stacked one on the other.

REFERENCES:
patent: 2821338 (1958-01-01), Metzger
patent: 2927722 (1960-03-01), Metzger
patent: 2946502 (1960-07-01), Metzger
patent: 3468471 (1969-09-01), Linder
patent: 3716180 (1973-02-01), Bemiss et al.
patent: 4134535 (1979-01-01), Barthels et al.
patent: 4206870 (1980-06-01), DeVries
patent: 4553693 (1985-11-01), Terajima et al.
patent: 4653661 (1987-03-01), Buchner et al.
patent: 4715494 (1987-12-01), Heitzenroder et al.

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