Container closures

Details Container closures Container closures

1992-11-19

1995-08-29

Shoap, Allan N.

Bottles and jars

Closures

Frangible member or portion

215 31, B65D 4134

Patent

active

054452848

ABSTRACT:
The screw-thread neck of a container, e.g. a glass bottle, has a closure with a tamper-evident ring connected to the lower end of the skirt of the closure by frangible bridges. Opposite the ring, the neck finish of the container has a nose-shaped projection the upper and lower flanks of which meet in a sharp edge, and has an annular groove below the projection. The bridges are formed in an inwardly facing groove above the projection and are radially spaced from the outer surface of the neck finish. The tamper-evident ring is swaged into close contact with the projection, is deformed into a channel on the neck finish below projection, and is closely engaged with the surface of the neck finish below the channel. Interference involving outward prying movement by a lever on the lower edge portion of the ring to disengage the ring from groove causes a pivoting action about the tip of projection leading to fracture of the bridges.

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