Metal lids for vacuum-sealing of packaging for foodstuff preserv

Details Metal lids for vacuum-sealing of packaging for foodstuff preserv Metal lids for vacuum-sealing of packaging for foodstuff preserv

1996-01-24

1998-11-10

Elkins, Gary E.

Bottles and jars

Closures

With vacuum breaker

215307, 220231, 22020311, 22020316, B65D 5116

Patent

active

058330909

ABSTRACT:
The present invention comprises a metal lid constituted by a circular panel, endowed with downward short turned rim or skirt and provided in its inner peripheral circumference a circular groove containing a sealing gasket and having a circular concave depression disposed preferably in a central portion of the panel, wherein there is formed a central hole and wherein in a lateral portion or sector of this circular depressed area is applied a film of high-adherence varnish, being furthermore filled up with an adherent thermoplastic and melting material-former of the seal that penetrates in the hole, forming a short vertical rod, which does not extravasate the hole and remains with its end close and at the same plane of the internal and inferior surface of the panel of the lid without forcing any portion or residue of the material in the inferior part of the hole and further wherein, the film of high-adherence varnish, applied in a lateral part or sector of the circular depression, allows the partial retention of the seal on the occasion of its lifted slightly and release of the relief hole, and the reapplying after the first opening of the packaging.

REFERENCES:
patent: 1985788 (1934-12-01), Gore-Lloyd
patent: 3462037 (1969-08-01), Keller
patent: 3736899 (1973-06-01), Manske
patent: 4398491 (1983-08-01), Fridl et al.
patent: 4448325 (1984-05-01), Edwards et al.
patent: 5275679 (1994-01-01), Rojek
patent: 5439724 (1995-08-01), Rojek

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