Foam front heat induction foil

Details Foam front heat induction foil Foam front heat induction foil

1996-10-21

1998-02-24

Cronin, Stephen

Bottles and jars

Closures

Retained by bonding or adhesive means

215348, 215349, B65D 5304

Patent

active

057204012

ABSTRACT:
An inner seal for sealing containers by heat induction, especially when the inner seal may be in contact with the contents of the container during sealing. The inner seal includes a metallic foil layer which heats up almost instantaneously, and a foam layer which thermally insulates the foil layer from the contents of the container which may be in contact with the inner seal. The foam layer is compressed, and is consequently a poorer thermal insulator, where it contacts the land area of the neck of the container to which it is being sealed.

REFERENCES:
patent: 3632004 (1972-01-01), Grimes
patent: 3767076 (1973-10-01), Kennedy
patent: 4324601 (1982-04-01), Dembicki et al.
patent: 4452842 (1984-06-01), Borges et al.
patent: 4531649 (1985-07-01), Shull
patent: 4588099 (1986-05-01), Diez
patent: 4684554 (1987-08-01), Ou-Yang
patent: 4778698 (1988-10-01), Ou-Yand
patent: 4961513 (1990-10-01), Gossedge et al.
patent: 5176271 (1993-01-01), Painchaud et al.
patent: 5372268 (1994-12-01), Han

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