Bottle closure

Details Bottle closure Bottle closure

1974-08-28

1976-08-10

Norton, Donald F.

Bottles and jars

Closures

Cap type with manually actuated means to contract depending...

B65D 4532

Patent

active

039736881

ABSTRACT:
The invention is concerned with bottle closures, particularly for bottles containing carbonated beverages and the like and the main object is to provide a closure which represents a gastight seal independent of time and bottle contents, the bottle closure being easy to operate at any time.
According to the invention this is obtained in a bottle closure comprising a sealing member of resilient material slidably taken up in a retaining cap, wherein the sealing element is provided with an annular collar of an antifriction material, such as polypropylene or a similar material which is inert towards the actual gases and vapors, the annular collar forming a portion of the surface of the sealing element and is substantially the contact surface against the retaining cap.

REFERENCES:
patent: 2586440 (1952-02-01), Satz
patent: 2903148 (1959-09-01), Keller
patent: 3680731 (1972-08-01), Lelyk

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