Container closures and processes of making them

Details Container closures and processes of making them Container closures and processes of making them

1991-09-19

1994-05-10

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525315, 525316, 426397, 220304, 215363, C08L 900, C08L 4700, C08L 5302

Patent

active

053107977

ABSTRACT:
Bottle gaskets are provided from a thermoplastic composition comprising a homogeneous blend of butyl rubber with other thermoplastic polymer. The gaskets provide an effective seal at a moderate pressure but permit venting at a higher pressure. They can be made by inserting molten heated thermoplastic material into the bottle cap and moulding it in the cap and cooling it to form the gasket.

REFERENCES:
patent: 3705122 (1972-12-01), Gwinner
patent: 4277431 (1981-07-01), Peller
patent: 4518336 (1985-05-01), Alieri
patent: 4833206 (1989-05-01), Tajima
patent: 5211974 (1993-05-01), White
CA 112(18): 160731y, Apr. 30, 1990, Hofeldt et al.
CA 112(8): 57713v, Feb. 19, 1990, White.
CA 115(8): 73488t Aug. 26, 1991, Kvyk et al.
CA 102(12): 96678a, Mar. 25, 1985, Sekisui Chem. Co., Ltd.
CA 99(8): 55087h, Aug. 22, 1983, Mendelsohn et al.
CA 69(4): 11073b, May 1, 1968 Ceresa et al.
Derwent Publications Abstract, AN-73-269270 of Japanese Patent Application 48014708.

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