Tamperproof closure

Details Tamperproof closure Tamperproof closure

1981-11-27

1983-09-06

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

B65D 4134

Patent

active

044024185

ABSTRACT:
This invention relates to a tamperproof package which includes a thermoplastic closure for fitment to a container which has a threaded neck portion and an outwardly extending annular flange adjacent but beneath the threaded neck portion. The thermoplastic closure features an annular band which is attached to the lowermost extent of the closure sidewall by way of a plurality of spaced-apart frangible ribs. Pendantly attached to the lower portion of the annular band is a plurality of spaced-apart tabs. These tabs are inwardly foldable so that a tab portion will be in a position of interference with the container annular flange when the closure is fitted to the container. This interference prevents removal of the closure from the container unless there is fracture of the frangible ribs. Rib fracture indicates that the closure has been tampered with by removal or attempted removal of the closure.

REFERENCES:
patent: 4153174 (1979-05-01), Keeler
patent: 4196818 (1980-04-01), Brownbill
patent: 4206851 (1980-06-01), Ostrowsky
patent: 4322012 (1982-03-01), Conti

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