Tamper indicating hermetic seal

Details Tamper indicating hermetic seal Tamper indicating hermetic seal

1986-10-22

1988-01-19

Culver, Horace M.

Package making

Methods

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

53478, 53487, 156 69, B65B 6102, B65B 5122, B67B 320

Patent

active

047197404

ABSTRACT:
A method of constructing a closure and applying it to a container to provide a hermetically sealed, tamper-indicating package which can be easily opened without danger of contaminating the container contents by fragmentation of the sealing element. The sealing element is formed as a laminated liner disk haivng an inner foil layer and an outer tough thermoplastic layer. A heat sealing layer allows the liner disk to be hermetically sealed to the container by induction heating after the closure is attached to the container. A frangible opening line is created by melting through the thermoplastic layer and heat sealing layer to the metal foil layer.

REFERENCES:
patent: 3460310 (1969-08-01), Adock et al.
patent: 3486959 (1969-12-01), Podesta et al.
patent: 3494093 (1970-02-01), Downs et al.
patent: 3583125 (1971-06-01), Vermeulen
patent: 3767076 (1973-10-01), Kennedy
patent: 3815314 (1974-06-01), Pollock et al.
patent: 3826059 (1974-07-01), Novitch
patent: 3874143 (1975-04-01), Braber
patent: 4228633 (1980-10-01), Corbic

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