Tamper indicating construction for plastic closures

Details Tamper indicating construction for plastic closures Tamper indicating construction for plastic closures

1979-08-06

1980-12-30

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

B65D 4134

Patent

active

042418429

ABSTRACT:
A resilient plastic screw-type closure, for use with any of a number of standard container top designs, is molded with a plurality of indicating members comprising a detachable lower rim of the closure. As initially molded, the indicating members are outside the principal external contours of the closure, but after installation on the container they are tilted inward until retained by locking means within the principal contours. In this condition they are positioned underneath an annular shoulder formed around the neck of the container. Thereafter, the closure cannot be removed, or substantially loosened, without partially or wholly detaching the indicating members from the body of the closure.

REFERENCES:
patent: 2116938 (1938-05-01), White
patent: 3231123 (1966-01-01), Heierle
patent: 3484012 (1969-12-01), White
patent: 3675805 (1972-07-01), Shane
patent: 4126240 (1978-11-01), Brach
patent: 4153174 (1979-05-01), Keeler
patent: 4156490 (1979-05-01), Peraboni

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