Screw cap with tamper-proof hold ring

Details Screw cap with tamper-proof hold ring Screw cap with tamper-proof hold ring

1981-07-01

1983-07-26

Norton, Donald F.

Bottles and jars

Closures

Closure pivoted about receptacle opening

215252, 215253, B65D 4134

Patent

active

043949185

ABSTRACT:
The disclosure concerns a screw cap comprised of semi-rigid plastic material and including a tamper-proof hold ring. The screw cap is for use on the neck of a container, such as a bottle. The hold ring has an inside diameter that is at least equal to the outside diameter of the cap body. Six lock lugs supported on the ring are inclined upwardly and inwardly toward the neck closing end of the cap body. The lock-lugs elastically hook behind a collar or mating ring at the bottle neck to prevent the tamper-proof hold ring from being lifted off the neck of the bottle when the cap body is unscrewed. Breakable attachment tabs initially hold the cap body to the tamper-proof hold ring and these are broken as the cap is initially unscrewed. An unbreakable flange between the cap body and the tamper-proof ring serves as a tilt hinge for the unscrewed cap.

REFERENCES:
patent: 2961119 (1960-11-01), Leach
patent: 4109814 (1978-08-01), Rausing
patent: 4153174 (1979-05-01), Keeler
patent: 4196818 (1980-04-01), Brownbill
patent: 4299329 (1981-11-01), Ochs et al.
patent: 4333577 (1982-06-01), Mumford

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