Closure cap with a seal and method of and apparatus for forming

Details Closure cap with a seal and method of and apparatus for forming Closure cap with a seal and method of and apparatus for forming

1989-08-08

1992-10-27

Marcus, Stephen

Bottles and jars

Closures

Cap type

215DIG1, 277 1, A47J 4102, B65D 5300

Patent

active

051581957

ABSTRACT:
In combination, a container and a linerless cap and a method of forming the cap. In the method the cap is molded from plastic and includes a top wall, an outer depending skirt and an internal depending substantially annular wall having an upper end integral with and depending from the top wall and a lower free end. Thereafter the free end is engaged by a curling tool to progressively turn the free end away from the internal wall to curve the free end into a curvilinear compressible and resilient free end adapted to be engaged for sealing. The engageable free end of the seal can have a coil, O, U, J or quarter round cross sectional shape and can be a rim, plug or corner seal.

REFERENCES:
patent: 2456560 (1948-12-01), Keith
patent: 3038624 (1962-06-01), Wieckmann
patent: 3200981 (1965-08-01), Harding
patent: 3203571 (1965-08-01), Plunkett
patent: 3837657 (1974-09-01), Farnam et al.
patent: 3974932 (1976-08-01), Faulstich
patent: 4793506 (1988-12-01), Thompson
patent: 4811857 (1989-03-01), Thompson

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