Bottles and jars – Closures – Frangible member or portion
Patent
1983-03-17
1984-12-25
Norton, Donald F.
Bottles and jars
Closures
Frangible member or portion
215258, B65D 4134
Patent
active
044898436
ABSTRACT:
Tamper-evident closures include a threaded cap and a tamper-evident ring removably connected to each other by break-away tabs adapted to break when the cap is rotated in a direction to remove it from a cooperating container. The cap and ring have cooperating surfaces for transmitting closing rotational movement of the cap to the ring to thereby rotate the cap and ring together during closing of the container to thereby prevent separation of the cap from the ring at the break-away tabs. The ring further includes at least one locking surface adapted to engage a corresponding surface on a container to prevent the ring from rotating in the opening direction of rotation, whereby rotation of the closure to open it will cause relative movement between the cap and ring to sever the break-away tabs. A method of molding the cap, tamper-evident ring and break-away tabs as a single member also constitutes a part of the invention, as well as the particular container constructions adapted to cooperate with the closures.
REFERENCES:
patent: 2423582 (1947-07-01), Coleman
patent: 3455478 (1969-07-01), Fields et al.
patent: 3504818 (1970-04-01), Crisci et al.
patent: 3901403 (1975-08-01), Menke
patent: 3980195 (1976-09-01), Fillmore
patent: 4352436 (1982-10-01), Chartier et al.
Captive Plastics Inc.
Norton Donald F.
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