Closure cap with a linerless seal and method of forming such clo

Details Closure cap with a linerless seal and method of forming such clo Closure cap with a linerless seal and method of forming such clo

1987-06-10

1988-09-13

Norton, Donald F.

Bottles and jars

Closures

Cap type

215DIG1, 264295, 264296, 264320, B65D 5300

Patent

active

047703091

ABSTRACT:
In combination, a container and a one piece, linerless cap and a method of forming the cap. The cap includes plastic and has a sealing surface which is softer than contiguous plastic portions as a result of its method of forming which includes stretching. In the method the cap is molded from plastic and includes a top wall and an outer depending skirt. Thereafter the top wall is engaged by a forming tool to create a stretched portion for sealing.

REFERENCES:
patent: 3343700 (1967-09-01), Heubl
patent: 3482725 (1969-12-01), Exton
patent: 4209102 (1980-06-01), Dunn et al.

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