Press-on twist-off infestation-proof closure for oxygen sensitiv

Details Press-on twist-off infestation-proof closure for oxygen sensitiv Press-on twist-off infestation-proof closure for oxygen sensitiv

1974-05-22

1977-01-04

Norton, Donald F.

Bottles and jars

Closures

Cap type

B65D 4104

Patent

active

040008258

ABSTRACT:
A press-on turn-off closure cap for glass containers which have a top rim sealing finish, a contiguous frusto-conical sealing finish, and on the neck therebelow a circumferential band of thread formations. The closure cap has a cup-shaped shell with a top panel and a two-step depending skirt. The shell is lined at the juncture of the top panel and the upper inner step with an annular gasket formed of solid plastisol or the like which provides hermetic sealing engagement with both the top rim finish and also the contiguous frusto-conical side seal finish. In addition the lower step of the shell is lined with a circumferential gasket which after being pushed down over the band of thread formations takes a cold-flow set so as to form mating thread formations capable of camming the closure cap off the container on relative rotation between the cap and container.

REFERENCES:
patent: 3110409 (1963-11-01), Chaplin
patent: 3270904 (1966-09-01), Foster
patent: 3371813 (1968-03-01), Owen
patent: 3473684 (1969-10-01), Wagner
patent: 3690497 (1972-09-01), Lecinski

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