Retortable closure for plastic container

Details Retortable closure for plastic container Retortable closure for plastic container

1989-08-03

1991-04-02

Marcus, Stephen

Bottles and jars

Closures

Retained by bonding or adhesive means

215249, 215254, B65D 5120

Patent

active

050041100

ABSTRACT:
There is disclosed a closure which permits the opening of a membrane sealed nutritional or pharmaceutical product container in a single action motion which also maintains a hermetic seal under retort conditions. This closure includes a generally cylindrical side wall having threads along the inner surface thereof and retaining means for cooperative engagement with the lip of a plastic container, and a top having an annular rim portion and a center portion, with the top having a lower surface attached to a heat-sealable barrier able to be secured to the plastic container, with the top also having a center portion removal means. A method is also disclosed for providing a hermetic seal on plastic containers using the closure and plastic container of this invention.

REFERENCES:
patent: 1170152 (1916-01-01), Heath
patent: 2544969 (1951-03-01), Underwood
patent: 3276613 (1966-10-01), Bozek
patent: 3480171 (1969-11-01), Rohde
patent: 3480173 (1969-11-01), Wheaton
patent: 3596790 (1971-08-01), Leftault, Jr.
patent: 3866782 (1975-02-01), Westfall
patent: 4244478 (1981-01-01), Handman
patent: 4501371 (1985-02-01), Smalley
patent: 4757911 (1988-07-01), Larkin et al.
patent: 4807769 (1989-02-01), Gach

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