Tamper-proof closure cap and method of fabrication

Details Tamper-proof closure cap and method of fabrication Tamper-proof closure cap and method of fabrication

1980-04-23

1982-07-06

Hall, George T.

Bottles and jars

Closures

Frangible member or portion

264156, B65D 4134

Patent

active

043378706

ABSTRACT:
A thermoformed, polymer plastic closure body is disclosed having integrally formed cap, ring and frangible bridge members. Ratchet segments and a collar segment are integrally formed with the ring member and the frangible bridge members extend between the cap member and the collar segment at a location intermediate the ratchet segments for limiting a force applied to the bridge member during mounting rotation of the closure member upon a container. The bridge members are slanted for further reducing the applied force during rotation and the cross sectional area of the bridge member is configured for causing a sheared bridge member to be retained with the ring member. An improved method for fabricating the closure body provides for thermoforming a sheet of polymer plastic to provide a body having integrally formed cap and ring members, and, subsequently mechanically lancing arcuate segments to provide arcuate grooves which are spaced apart by integrally formed bridge members.

REFERENCES:
patent: 3504818 (1970-04-01), Crisci et al.
patent: 3904061 (1975-09-01), Keeler
patent: 4225050 (1980-09-01), Reinhart

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