Tamper evident closure

Details Tamper evident closure Tamper evident closure

1992-06-10

1993-03-02

Shoap, Allan N.

Bottles and jars

Closures

Including visual indicia

215203, 215318, 116207, 2522997, B65D 5502

Patent

active

051901757

ABSTRACT:
In accordance with the present invention, an irreversible tamper evident system for a closure such as a button closure is provided. The irreversible tamper evidence system is provided by an appearance change system carried by the flexible button portion of the closure. The appearance change system comprises a liquid crystal material and a liquid crystal poison. When the button is depressed such as upon initial closure of the container, the liquid crystal material is separated from the liquid crystal poison and optical properties of the liquid crystal material are viewable. When the container is opened the flexing the button forces the liquid crystal poison into contact with the liquid crystal material and the optical properties of the liquid crystal material are irreversibly altered.

REFERENCES:
patent: 3409404 (1968-11-01), Fergason
patent: 3529156 (1970-09-01), Fergason et al.
patent: 3576761 (1971-04-01), Davis
patent: 3736899 (1973-06-01), Manske
patent: 4426881 (1984-01-01), Magoulick
patent: 4469452 (1984-09-01), Sharpless et al.
patent: 4480760 (1984-11-01), Schonberger
patent: 4502605 (1985-03-01), Wloszczyna
patent: 4505399 (1985-03-01), Weiner
patent: 4519515 (1985-05-01), Schonberger
patent: 4736857 (1988-04-01), Monico, Jr. et al.
patent: 4793500 (1988-12-01), Harding
patent: 4801929 (1989-01-01), Instance
patent: 4813712 (1989-03-01), Scopes
patent: 4877143 (1989-10-01), Travisano
patent: 5018632 (1991-05-01), Schmidt
patent: 5022545 (1991-06-01), Carson
patent: 5104704 (1992-04-01), Labes et al.

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