Conically threaded closure system

Details Conically threaded closure system Conically threaded closure system

1996-11-07

1998-07-28

Shoap, Allan N.

Bottles and jars

Closures

Cap type

215 44, 215321, 215349, 220288, 220289, B65D 4104

Patent

active

057851956

ABSTRACT:
A conically threaded closure system is described which provides a compressive radial force to axial force ratio in the range of 4.3-6.2:1, resulting in an optimum stress distribution throughout the thread structures, optimum thread engagement with minimal rotational effort and primary and secondary sealing means. The system comprises a container having a first conical thread structure and a cap having a second conical thread structure disposed on the inside surface of the cap skirt adapted to cooperate with the first conical thread structure. The first and second conical thread structures each have a conical angle in the range of approximately 20.degree. to 30.degree., preferably approximately 24.degree. to 28.degree..

REFERENCES:
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patent: 4764067 (1988-08-01), Kawashima
patent: 4798303 (1989-01-01), Arnold
patent: 4958973 (1990-09-01), Sugimura
patent: 5494174 (1996-02-01), Rohr et al.
patent: 5542532 (1996-08-01), Mitchell
patent: 5676270 (1997-10-01), Roberts
patent: 5713479 (1998-02-01), Brady

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