Tamper evident closure using microcapsules

Details Tamper evident closure using microcapsules Tamper evident closure using microcapsules

1990-07-18

1992-10-06

Marcus, Stephen

Bottles and jars

Closures

Including visual indicia

215270, B65D 5502

Patent

active

051524120

ABSTRACT:
This relates to the provision of a vacuum identifying button of a conventional closure for containers with encapsulated microcapsules containing a suitable dye. While the button is in its depressed, concave configuration, a coating surrounding the microcapsules is cured and caused to bond to the microcapsules. When the button everts to project upwardly and have a convex configuration, the coating is tensioned causing the microcapsules to rupture and release the color forming dye materials thereof. If desired, the evidence of button flipping or tampering may merely be in the form of a colored area, such as a stripe. In a modification, the effected colored areas may be in a design to present a warning or message. For example, a simple message such as "OPENED" may be effected.

REFERENCES:
patent: 2131774 (1938-10-01), Waring
patent: 2131775 (1938-10-01), Waring
patent: 3736899 (1973-06-01), Manske
patent: 3896965 (1975-07-01), Cornell
patent: 3935960 (1976-02-01), Cornell
patent: 4424911 (1984-01-01), Resnick
patent: 4480760 (1984-11-01), Schonberger
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patent: 4533059 (1985-08-01), Kapolas et al.
patent: 4678082 (1987-07-01), Fillmore
patent: 4765498 (1988-08-01), Rafferty
patent: 4877143 (1989-10-01), Travisano
patent: 4957211 (1990-09-01), Ekkert et al.
patent: 5022545 (1991-06-01), Carson

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