Sealing cap for vacuum containers

Details Sealing cap for vacuum containers Sealing cap for vacuum containers

1994-11-07

1996-09-24

Cronin, Stephen K.

Receptacles

Closures

Combined or convertible

220240, 215228, 215262, 215270, B65D 3104

Patent

active

055582435

ABSTRACT:
A sealing cap for coupling with an upper edge of a container includes a base disc, a spiral spring, a sucking plate and a soft cap body combined together. The soft cap body is able to be pressed down manually and pushed up by the spring and the sucking plate, to force air from the container to flow out of a hole in the outer circumference of the base disc. The air in the container flows through a stop valve, formed in the bottom center of the base disc, into the space between the base disc and the soft cap body. The air is stopped by a leak valve fixed in the outer circumference of the base disc. A repeated pressing action on the soft cap body is capable of displacing sufficient air from the container to create a partial vacuum therein.

REFERENCES:
patent: 3313444 (1967-04-01), Katell
patent: 3602387 (1971-08-01), Patnaude
patent: 5347918 (1994-09-01), Chen
patent: 5364241 (1994-11-01), Schultz
patent: 5390809 (1995-02-01), Lin
patent: 5406992 (1995-04-01), Miramon
patent: 5469979 (1995-11-01), Chiou

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