Back-off resistant closure for a container

Details Back-off resistant closure for a container Back-off resistant closure for a container

1989-04-03

1990-04-03

Norton, Donald F.

Bottles and jars

Closures

Cap type

215216, B65D 4104

Patent

active

049132997

ABSTRACT:
A back-off resistant closure for resealable engagement upon a container having a neck with a ring of outwardly projecting ratchet formations includes a generally planar top portion with a depending peripheral annular skirt, the skirt having a plurality of recess formations for matingly engaging the ratchet formations on the container neck, thus preventing unwanted backing-off of the closure from the container, as well as facilitating the removal of the finished closure from conventional injection molding machinery.

REFERENCES:
patent: 2153426 (1939-04-01), McNamara et al.
patent: 2423582 (1947-07-01), Coleman
patent: 2980275 (1961-04-01), Lundgren
patent: 3297185 (1967-01-01), Plymale
patent: 3924769 (1975-12-01), Fillmore
patent: 3977557 (1976-08-01), Hazard
patent: 3980195 (1976-09-01), Fillmore
patent: 4134513 (1979-01-01), Mumford
patent: 4275817 (1981-06-01), Patton
patent: 4345691 (1982-08-01), Burke
patent: 4461394 (1984-07-01), Sendel et al.
patent: 4664273 (1987-05-01), Simon
patent: 4674643 (1987-06-01), Wilde et al.

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