Method of sealing a plastic container

Details Method of sealing a plastic container Method of sealing a plastic container

1990-09-24

1991-08-27

Sipos, John

Package making

Methods

Forming a cover adjunct or application of a cover adjunct to...

53420, 53478, 53490, B65B 728, B65B 6118

Patent

active

050422260

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: 2387439 (1945-10-01), Grabus, Jr. et al.
patent: 3815314 (1974-06-01), Pollack et al.
patent: 4666052 (1987-05-01), Ou-Yang
patent: 4719740 (1988-01-01), Gach
patent: 4818577 (1989-04-01), Ou-Yang
patent: 4846361 (1989-07-01), Haffner
patent: 4852754 (1989-08-01), Holdsworth et al.
patent: 4946038 (1990-08-01), Eaton

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