Lined child-resistant closure for widemouth liquid container

Details Lined child-resistant closure for widemouth liquid container Lined child-resistant closure for widemouth liquid container

1985-12-16

1986-11-04

Hall, George T.

Bottles and jars

Closures

Having warning means or means impeding closure removal

215222, B65D 5502

Patent

active

046206400

ABSTRACT:
A liquid-tight child-resistant package that includes a glass or plastic container of the wide mouth type (i.e., with a container finish "T" dimension of at least 33 millimeters) and a complementary molded thermoplastic closure that utilizes a separate disk-type liner. The closure which, with the exception of the separate liner, is molded in one piece, has a multiple helical thread start, and each closure thread has a vertically extending shoulder on its upper side. Each complementary container finish thread has a vertically extending shoulder that engages the corresponding shoulder on the closure, after the partial unscrewing of the closure, to prevent further unscrewing of the closure until the closure is vertically depressed on the container finish, against the spring action of the closure liner, to separate the shoulder on the closure thread from the shoulder on the container thread and to thereby permit continuation of the unscrewing of the closure until it can be removed from the container. The container also has a series of threadlike projections below the container threads and the closure thread is received in helical slots between the container threads and the threadlike projections. The threadlike projections help to positively lift the closure off the container finish during the opening of the container.

REFERENCES:
patent: 3952899 (1976-04-01), Cooke
patent: 4139112 (1979-02-01), Cooke
patent: 4275817 (1981-06-01), Patton
patent: 4387817 (1983-06-01), Wiles et al.

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