Gas-permeable, liquid-tight closure

Details Gas-permeable, liquid-tight closure Gas-permeable, liquid-tight closure

1975-01-21

1976-04-20

Norton, Donald F.

Bottles and jars

Closures

Barrier permeable to gas and impermeable to liquid

55505, 55528, B65D 5304

Patent

active

039512932

ABSTRACT:
A gas-permeable liquid closure for containers of liquids or solids which emit or absorb gas is provided by a film of an unsintered tetrafluoroethylene having a thickness of from about 0.1 to 3 mm., a fibrillated structure and a density of less than about 1.4. The film is supported across an opening of the container by a perforated cap or perforated sealing diaphragm which is disposed on either one or both sides of the film.

REFERENCES:
patent: 2298938 (1942-10-01), Griffin
patent: 3326401 (1967-06-01), Delong
patent: 3448882 (1969-06-01), Roy
patent: 3520416 (1970-07-01), Keedwell
patent: 3664915 (1972-05-01), Gore

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