Pilfer-proof plastic closure for containers

Details Pilfer-proof plastic closure for containers Pilfer-proof plastic closure for containers

1985-01-02

1986-05-13

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

B65D 4134

Patent

active

045881006

ABSTRACT:
A pilfer-proof plastic closure comprising a top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall. The skirt wall has formed therein a circumferentially extending breakable line dividing the skirt wall into a main portion above the breakable line and a pilfer-proof bottom portion below it. The main portion has formed on its inner surface an internal thread and the pilfer-proof bottom portion has formed on its inner surface a plurality of radially inwardly projecting engaging flaps at circumferentially spaced positions. Each of said engaging flaps has a first portion extending from the inner surface of the pilfer-proof bottom portion and a second portion extending further from the forward end of the first portion inclinedly to the first portion in the closing direction of the closure for mounting the closure on the mouth-neck portion.

REFERENCES:
patent: 4418828 (1983-12-01), Wilde et al.
patent: 4488655 (1984-12-01), Itsubo et al.

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