Retortable composite closure for plastic containers

Details Retortable composite closure for plastic containers Retortable composite closure for plastic containers

1989-08-03

1991-02-12

Garbe, Stephen P.

Bottles and jars

Closures

Retained by bonding or adhesive means

215276, 156 69, 53478, B65D 4100, B65B 700, B65B 5110

Patent

active

049917315

ABSTRACT:
This invention relates to a closure which permits the opening of a hermetically sealed plastic container in a single action motion, which also maintains the hermetic seal under retort conditions. This closure includes a generally cylindrical side wall having threads along the inner surface thereof and a top portion having a metallic disk with its lower surface coated with a fusible coating, such as polypropylene. An annular flange is provided along the inner surface of the side wall to retain the metallic disk between the annular flange and an inwardly inclined inner surface portion of the side wall. A method is also disclosed for providing a hermetic seal on plastic containers using the closure of this invention.

REFERENCES:
patent: 4782968 (1988-11-01), Hayes
patent: 4809858 (1989-03-01), Ochs
patent: 4815617 (1989-03-01), Cullum

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