Pressure venting closure
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United States of America Patent
Stats
-
Feb 19, 1991
Grant Date -
N/A
app pub date -
Sep 1, 1989
filing date -
Sep 1, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite closure for a container vents internal gas pressure in excess of a pre-established maximum. An insert disk fits inside an overhanging top lip of the closure. The undersurface of the top lip is recessed to present a chamber into which excess gas pressure beneath the cover can deflect the disk and thereby provide a vent under the disk. A stop on a small area of the undersurface of the top lip positively abuts the disk to prevent blocking the chamber if the closure is overtightened.
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