Time indicator having discrete adhesive

Details Time indicator having discrete adhesive Time indicator having discrete adhesive

1994-07-29

1995-08-29

Roskoski, Bernard

Horology: time measuring systems or devices

Miscellaneous

116200, G04B 1700, G09F 1900

Patent

active

054467055

ABSTRACT:
A time indicator is provided that changes color or produces an image or information after a specific time interval. The time indicator includes a base substrate with colored dye deposited on a first surface; and a substrate having an adhesive on a first surface thereof, the adhesive positioned at discrete locations on the first surface of the substrate. The substrate and the base substrate are put into adhesive contact. The adhesive contacts and coacts the colored dye to dissolve the dye and permit the dye to migrate through the adhesive to cause a color change visible through the substrate. The discrete adhesive inhibits lateral migration of the dye to preserve the image or information of the dye in a clear and/or understandable condition.

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