Valve for vented package

Details Valve for vented package Valve for vented package

1974-01-18

1976-02-10

Dixson, Jr., William T.

Envelopes, wrappers, and paperboard boxes

File folder or file envelope

Hanging type

229DIG14, 229 48T, 426118, B65D 3114

Patent

active

039373967

ABSTRACT:
This disclosure relates to a vent valve arrangement for a sealed package wherein when excessive pressures occur within the sealed package, gases will automatically be vented therefrom. The vent valve includes at least one perforation in the package with the perforation being formed through one of two walls of the package into the interior thereof and there being a resistance path from the interior of the package to the perforation with the resistance path being openable by forces expanding the walls whereby pressure that is caused by the formation of gases and vapors within the package will open the resistance path and escape through the perforation.

REFERENCES:
patent: 2361344 (1944-10-01), Yates
patent: 3108881 (1963-10-01), Shaw et al.
patent: 3123210 (1964-03-01), Hermanson et al.
patent: 3237844 (1966-03-01), Hughes
patent: 3502487 (1970-03-01), Byrd
patent: 3637132 (1972-01-01), Gray

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