Overpressure valve for packaging containers

Details Overpressure valve for packaging containers Overpressure valve for packaging containers

1993-10-01

1995-06-27

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Edge feature

428193, 428194, 428195, 428201, 428202, 428214, 383103, 137246, B32B 900

Patent

active

054278392

ABSTRACT:
Overpressure valves for packaging containers are supplied in a roll, transported in this form to a packaging machine, separated here and attached to packaging containers by means of an adhesive coated surface. For this purpose the overpressure valves have a layer of emulsion bonding on their underside. To prevent individual layers of the roll from sticking together, the overpressure valves have an adhesive-repelling layer on their top side. The overpressure valves are connected to one another in one piece and in a row, and are separated consecutively in a packaging machine.

REFERENCES:
patent: 2927722 (1954-11-01), Metzger
patent: 2946502 (1960-07-01), Metzger
patent: 4134535 (1979-01-01), Barthols et al.
patent: 4553693 (1985-11-01), Terajima et al.
patent: 4653661 (1987-03-01), Buchner et al.
patent: 4715494 (1987-12-01), Heitzenrodner et al.
patent: 4971218 (1990-11-01), Buchner et al.
patent: 5178023 (1993-01-01), Domke et al.
patent: 5263777 (1993-11-01), Domke
patent: 5326176 (1994-07-01), Domke

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