Closure

Details Closure Closure

1992-07-20

1994-05-03

Shoap, Allan N.

Bottles and jars

Closures

Cap type

215256, 215305, 215337, 215344, 220296, B65D 4104

Patent

active

053079450

ABSTRACT:
An injection molded threaded cap for use with containers of varying dimensions. The cap of the present invention includes a cover from which depends an integral plug. An auxiliary sealing ring is disposed at the outside base of the plug to compensate for differences between the diameter of the plug and the diameter of the opening to be sealed by the cap. To prevent doming of the cover of the cap, the underside of the cover has shrinkage resistance formations which provide the cap with structural resistance to the effects of shrinkage. The cap of the present invention further includes a ratchet ring having ratchet teeth designed to enhance the tamper-evidency of the frangible ratchet ring. In an alternative embodiment, the cap includes a thread form which reduces the amount of rotation required to install the cap onto a bottle neck. The thread form includes thread segments which result in less resin being used to form the cap and which results in the formation of an unthreaded area at the base of the inside surface of the skirt of the cap. The unthreaded area facilitates the initial engagement of the cap and the bottle neck. The alternative embodiment also includes a spline arrangement which provides the cap with an anti-stripping feature.

REFERENCES:
patent: 3527372 (1970-09-01), Manning
patent: 3901404 (1975-08-01), Feldman
patent: 4131212 (1978-12-01), Rumball
patent: 4687114 (1987-08-01), Crisci

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