Closure device for containers

Details Closure device for containers Closure device for containers

1985-11-12

1987-06-16

Hall, George T.

Bottles and jars

Closures

Having warning means or means impeding closure removal

B65D 5502, B65D 8556

Patent

active

046730958

ABSTRACT:
A closure device for screw-threaded cylindrical container openings comprises inner and outer closure members having a first drive arrangement therebetween for turning the device clockwise to mount same to close the opening. A second drive arrangement comprises a hexagonal projection and a hexagonal orifice on the members which engage on application of axial pressure to the device to permit, on applying an anti-clockwise torque, unscrewing of the device from the opening. The orifice may be initially closed by a cover secured to the boundary by the orifice by frangible connectors which are fractured by the projection on initial axial pressure being applied. This provides a tamper evident feature. In other embodiments, a cover has a manually graspable tab for tearing it from the opening before axial pressure is applied.

REFERENCES:
patent: 4011960 (1977-03-01), Maurernay et al.
patent: 4394916 (1983-07-01), Smalley
patent: 4555036 (1985-11-01), Bekkers et al.

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