Induction sealed closure

Details Induction sealed closure Induction sealed closure

1973-03-01

1977-03-22

Price, William

Bottles and jars

Closures

Cap type

215232, 215341, 215349, 428484, B65D 5304, B65D 5306

Patent

active

040131882

ABSTRACT:
A novel membrane-to-closure mouth structure is effected by causing a paraffin-based heat activatable peelable sealing ply on a thin metallic foil to adhere to a sealing face of a closure mouth composed of a polymer such as polyethylene by electromagnetically inducing intense abbreviated heat in the foil and consequent focusing of the heat activation necessary for resin migration under pressure to form a water and gas transmission barrier in a frangible sealing ply structure composed primarily of low tensile strength waxes complemented by tackifying materials.

REFERENCES:
patent: 2185031 (1939-12-01), MacLaren
patent: 2227787 (1941-01-01), Laufer
patent: 2528506 (1950-11-01), Faye
patent: 2620939 (1952-12-01), Weisgerber
patent: 2715474 (1955-08-01), Phillips
patent: 2734649 (1956-02-01), Callaham
patent: 2937481 (1960-05-01), Palmer
patent: 3301464 (1967-01-01), Amberg
patent: 3355348 (1967-11-01), Lamar
patent: 3460310 (1969-08-01), Adcock
patent: 3591031 (1971-07-01), Komendowski
patent: 3632004 (1972-01-01), Grimes
patent: 3767076 (1973-10-01), Kennedy

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