Process for forming and applying a hermetic, heat sealed closure

Details Process for forming and applying a hermetic, heat sealed closure Process for forming and applying a hermetic, heat sealed closure

1975-03-05

1976-06-15

McGehee, Travis S.

Package making

Interrelated or safety controls

53 41, 53 42, 53141, 53329, B65B 5120, B65B 728

Patent

active

039628442

ABSTRACT:
A process for providing a hermetic, heat-sealed closure for a filled, thermoplastic or thermoplastic coated container by the steps of: providing a continuous web of a thermoplastic material, having a temperature within the drooping and heat-sealing ranges of the thermoplastic material, draped over the mouth of the filled container; urging the web inwardly of the mouth of the container so that the web overlies interior and exterior, thermoplastic surfaces of the mouth of the container; and pressing the web against the interior and exterior, thermoplastic surfaces of the mouth of the container to form a heat-sealed bond, by directing a stream of a gas against an exposed surface of the web overlying a thermoplastic surface of the mouth of the container.

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patent: 3491510 (1970-01-01), Sternau
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patent: 3708954 (1973-01-01), Wilke et al.
patent: 3720038 (1973-03-01), Bryan, Jr. et al.
patent: 3783581 (1974-01-01), Pierce

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