Method for sealing gas release valve

Details Method for sealing gas release valve Method for sealing gas release valve

1989-09-06

1991-09-17

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

493 87, 493213, 493929, 220209, B31B 184

Patent

active

050488465

ABSTRACT:
A method for filling gas release valves with sealant for affixing to packaging containers to be filled with a commodity which will generate a small amount of gases during shelf storage. The gas release valve having an apertured base film and a valve film superimposed on the base film to define a channel therebetween is attached to the container in registry with a vent in the container such that the valve may allow the gases given off by the commodity to escape to the exterior through the vent and the channel when the gas pressure rises beyond the atmospheric pressure. Before the gas release valve is attached to the container, the valve is sealed by inserting a nozzle into said channel through the aperture in the base film, and introducing a fluid sealant through the nozzle into the channel intermediate one peripheral edge of the channel and the circumference of the aperture, thereby filling the channel with the fluid sealant.

REFERENCES:
patent: 4290253 (1981-09-01), Domke et al.
patent: 4420015 (1983-12-01), Blaser
patent: 4444219 (1984-04-01), Hollenstein
patent: 4690667 (1987-09-01), Domke
patent: 4890637 (1990-01-01), Lamparter

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