Container closed by a membrane type seal

Details Container closed by a membrane type seal Container closed by a membrane type seal

1976-04-12

1977-08-30

Price, William

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

215DIG1, 220306, 220359, 215341, 215232, B65D 564, B65D 5300

Patent

active

040449416

ABSTRACT:
The open top of a container is surrounded by a rim having a curved upwardly presented surface and a slight ridge projecting upwardly from the curved surface. A seal membrane containing a metal foil extends over the open top of the container and seats against the ridge on the container rim. A flexible lid fits over the membrane and interlocks with the rim so that the membrane is interposed between the ridge and the lid. The lid has a downwardly opening annular groove which receives the container rim and this causes the seal to wrap generally around the curved upper surface of the rim. Once the lid and membrane are in place, the membrane is induction heated above the melting point of the container material, while a downwardly directed force is applied to the lid. The ridge, which is in contact with the seal membrane, melts down and thereafter is allowed to cool while the force is maintained on it, so that when the material solidifies, it is bonded to the membrane.

REFERENCES:
patent: 3428208 (1969-02-01), Kosar
patent: 3892351 (1975-07-01), Johnson et al.

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