Envelopes – wrappers – and paperboard boxes – Wrapper – Bottle
Patent
1976-04-26
1978-06-13
Price, William
Envelopes, wrappers, and paperboard boxes
Wrapper
Bottle
215232, 215350, 215352, 220258, 229 58, B65D 5302
Patent
active
040944603
ABSTRACT:
A closure assembly is disclosed which includes a plastic sealing ring having an annular channel in it for receiving and sealing against the entrance mouth of a container, a metal foil liner spanning the sealing ring and a flexible plastic overcap which receives the sealing ring and foil liner therein. The foil liner has a heat seal coating on one or both faces for sealing to the sealing ring and, in some packages, to the plastic overcap. The three-piece closure assembly is positioned on the entrance mouth of a container and the foil liner is induction heated to soften the heat seal coating thereon to seal the liner to the sealing ring. Induction heating may also be employed to adhesively join the foil liner to the undersurface of the overcap and seal the sealing ring to a foil layer in the container body.
REFERENCES:
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patent: 3924746 (1975-12-01), Haines
patent: 3930589 (1976-01-01), Koontz
patent: 3946871 (1976-03-01), Sturm
Callender Robert E.
Scanga Theodore P.
Aluminum Company of America
Bernstein Bruce H.
Brownlee David W.
Hill David J.
Price William
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