Vacuum-indicating closure

Details Vacuum-indicating closure Vacuum-indicating closure

1989-07-11

1990-09-18

Marcus, Stephen

Bottles and jars

Closures

Including visual indicia

215252, 215270, 215349, B65D 4104

Patent

active

049572113

ABSTRACT:
A vacuum-indicating closure includes a top wall 12 and a skirt 14 depending from the periphery of the skirt with a tamper-evident band 24 formed on the lower edge of the skirt. The top wall has a center deflectable portion 30 formed by a thinned circumferential hinge 32 and the deflectable portion is divided into pie-shaped segments 44 by a plurality of radially-extending thinned hinged 40. The center deflectable portion is moved between a convex position and a concave position with the presence or absence of vacuum within the container to which it is applied.

REFERENCES:
patent: 802001 (1905-10-01), Lorenz
patent: 933347 (1909-09-01), Schmitt
patent: 1607091 (1926-11-01), Lucas
patent: 1696330 (1928-12-01), Scofield
patent: 4122964 (1978-10-01), Morris
patent: 4293078 (1981-10-01), Percarpio et al.
patent: 4616761 (1986-10-01), Nolan
patent: 4658976 (1987-04-01), Pohlenz
patent: 4678082 (1987-07-01), Fillmore
patent: 4694969 (1987-09-01), Granat
patent: 4799598 (1989-01-01), McFadyen
patent: 4807770 (1989-02-01), Barriac

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