Permeable cap for flask

Details Permeable cap for flask Permeable cap for flask

1991-05-17

1993-01-19

Marcus, Stephen

Bottles and jars

Closures

Barrier permeable to gas and impermeable to liquid

215307, 215320, 220732, B65D 5300

Patent

active

051800730

ABSTRACT:
A cap for a flask includes a top portion; an inner collar extending downwardly from the top portion for insertion into the mouth of the flask; an outer collar spaced from the inner collar and extending downwardly from the top portion for covering the lip of the flask; detent means on the inner surface of the outer collar extending inwardly to positively engage the lip of the flask and sealingly engage the cap with the mouth of the flask; and a permeable section in the top portion within said inner collar for enabling exchange of gases in the flask.

REFERENCES:
patent: 4057160 (1977-11-01), Victor et al.
patent: 4257526 (1981-03-01), Weits et al.
patent: 4637520 (1987-01-01), Alvi
patent: 4756437 (1988-07-01), Rossi-Mossuti
patent: 4785952 (1988-11-01), Obadia

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