Venting resealable container closure and associated closure cont

Details Venting resealable container closure and associated closure cont Venting resealable container closure and associated closure cont

1990-10-22

1992-09-22

Marcus, Stephen

Receptacles

Closures

With condition responsive vent or valve

220203, 220258, 220259, 220266, 220268, 220278, 220306, 220336, 220366, B65D 5116

Patent

active

051489350

ABSTRACT:
A cap for substantially gas-tight sealing engagement with a container wall having an opening therein circumscribed by a sealing surface has an end wall and a depending skirt with a portion for securing the cap to a container wall, and a tab for manual engagement to rotate the cap between a container wall sealing surface engaging position and a storage position. The cap has a vent region provided by a weakened zone that is preferably located on or near the tab. The weakened area may include removal of a portion of the cap skirt, thinning a portion of the cap skirt, variations in wall thickness of portions of the cap skirt or top wall in a predetermined manner, configurating the portion of the tab which connects with the cap in such a manner as to facilitate ready circumferential expansion of the cap. Combinations of these weakening features may be employed. The cap is adapted once in gas-tight sealing engagement with the sealing surface of the container wall to vent in the weakened zone upon predetermined internal container, pressure being attained and, subsequently, automatically resealed. A container in combination with such a cap is also disclosed.

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W. Coy Willis, Scott C. Biondich, U.S. Pat. application Ser. No. 397,218 filed Aug. 23, 1989 now abandoned, Titled: Resealable Container Closure.

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