Container closure with breakable annular ring

Details Container closure with breakable annular ring Container closure with breakable annular ring

1980-01-24

1981-07-14

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

B65D 4134

Patent

active

042781809

ABSTRACT:
A container closure comprising a cap and an annular ring connected to the cap by a bridge. The annular ring includes a laterally extending span or weakened portion having lesser tensile strength than the remainder of the ring. When the cap is rotated to loosen the cap, the annular ring is constricted radially inwardly, thereby abutting the container neck and frustrating removal until either the bridge or span is broken. A broken bridge or span indicates both visually and by touch that the closure has been tampered with. In a preferred embodiment, the cap and annular ring are integrally molded from plastic as a unitary structure.

REFERENCES:
patent: 3407976 (1968-10-01), Homma
patent: 3463341 (1969-08-01), Fields
patent: 3504818 (1970-04-01), Crisci
patent: 3861551 (1975-01-01), Hannon
patent: 4126240 (1978-11-01), Brach

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