Closure cap with injection molded annular gasket and method...

Details Closure cap with injection molded annular gasket and method... Closure cap with injection molded annular gasket and method...

2008-05-05

2010-06-22

Nguyen, Khanh (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S328100, C264S328120, C264S328900, C425S127000, C425S129100, C425S542000, C425S809000

Reexamination Certificate

active

07740785

ABSTRACT:
A closure cap and method of making the same wherein an annular or ring-shaped gasket is injection molded onto the inner surface of a cap shell formed of plastic or metal. The annular or ring-shaped gasket includes at least one radially extending tab integrally formed therewith. A channel in the working surface of a mold core cooperates with the inside surface of the cap to form a mold cavity having the shape of the gasket to be formed therein. The cavity includes a melt inlet and a melt outlet which is in flow communication with a cold well through a connecting portion of reduced cross-sectional area with respect to the cross-sectional areas of both the gasket-defining mold cavity and the cold well.

REFERENCES:
patent: 3360148 (1967-12-01), Owen
patent: 3689625 (1972-09-01), Zipper
patent: 6082632 (2000-07-01), Clark et al.
patent: 6468455 (2002-10-01), Kobayashi

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