Pilfer-proof closure for containers

Bottles and jars – Closures – Frangible member or portion

Patent

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Details

215258, 215253, B65D 4134

Patent

active

041472683

ABSTRACT:
A pilfer-proof closure for use in combination with a standard container having a threaded neck portion and a collar below said threaded portion, comprising a body having an internally threaded upper portion followed by a lower skirt portion for protecting a flexible locking member attached to the inside of the body by frangible connectors situated on the outside circumference of the locking member. The locking member extends partially below the skirt portion so that it may be easily viewed. The skirt, however, extends past the frangible connectors to protect the connectors from tampering and severing. The flexible locking member carries a top surface which engages beneath the collar when the closure is threaded onto the container. When the closure is unthreaded from the container, the frangible connecting means are broken to completely disconnect the locking member from the threaded portion of the closure. The flexible locking member in one embodiment comprises an annular ring having a plurality of locking hooks which slope across the locking ring in a direction which is the same as that of the screw threads in the upper threaded portion of the closure so that the closure may be easily removed from its forming apparatus by unscrewing.

REFERENCES:
patent: 3329295 (1967-07-01), Fields
patent: 3673761 (1972-07-01), Leitz
patent: 3737064 (1973-06-01), Patel
patent: 3901403 (1975-08-01), Menke
patent: 3924769 (1975-12-01), Fillmore

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