Filter cap

Details Filter cap Filter cap

1987-12-29

1988-08-23

Norton, Donald F.

Bottles and jars

Closures

Barrier permeable to gas and impermeable to liquid

220371, 220256, B65D 5116

Patent

active

047654996

ABSTRACT:
A venting closure (10) for containers (12) having a pour opening (14) defined by a circumferential rim (16) includes a top wall (20) having inner (22) and outer (24) surfaces. A side skirt (26) extends from the top wall (20) about the inner surface (22). A liner (28) is mounted adjacent the inner surface (22) for perfecting a seal between the top wall (20) and the circumferential rim (16) when the closure (10) is secured upon the rim (16) and over the opening (14). The liner (28) includes a gas impermeable non-hydrophobic portion (30) at least about the periphery of the liner (28) and an integral gas permeable hydrophobic portion (32) offset therefrom.

REFERENCES:
patent: 3448882 (1969-06-01), Roy
patent: 3951293 (1976-04-01), Schulz

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