Closure with anti-backoff feature

Details Closure with anti-backoff feature Closure with anti-backoff feature

1993-05-13

1994-03-08

Shoap, Allan N.

Bottles and jars

Closures

Cap type

215331, B65D 4104

Patent

active

052920208

ABSTRACT:
A backoff resistant closure for use with a container having a neck portion with container threads integrally formed thereon, the container threads having an uppermost portion. At least one protuberance is integrally formed on the inner surface of the annular skirt of the closure which projects inwardly. The protuberance is spaced from the uppermost segment of the closure threading and positioned between the uppermost segment of the closure threading and the inner face of the top portion of the closure. The protuberance is configured to abut and provide a frictional retaining force against the uppermost portion of the container threads. The protuberance will also retain a closure liner within the closure.

REFERENCES:
patent: 3682345 (1972-08-01), Baugn
patent: 3871545 (1975-03-01), Bereziat
patent: 3963139 (1976-06-01), Gach
patent: 3979001 (1976-09-01), Bogert
patent: 4053077 (1977-10-01), DeFelice
patent: 4084716 (1978-04-01), Bogert
patent: 4461394 (1984-12-01), Sendel et al.
patent: 4697715 (1987-10-01), Beruvides
patent: 4736859 (1988-04-01), Mayes et al.
patent: 4913299 (1990-04-01), Petro
patent: 5197621 (1993-03-01), Bartl et al.

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