Hidden entry system and image-developing device therefor
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United States of America Patent
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-
Jan 16, 1996
Grant Date -
N/A
app pub date -
Feb 17, 1995
filing date -
Aug 23, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hidden entry system comprises a document having a first substrate bearing a localized latent image spaced apart from a removable image-developing device comprising a second substrate having a first surface and a second surface, the first surface of the second substrate bearing a chromogenic composition comprising an image-forming co-reactant, the image-forming co-reactant being a chromogen or a color developer, the second surface of the second substrate bearing a pressure-sensitive adhesive. The image developing device is in superposed relation with the first substrate with the pressure sensitive coating being releasably attached to the first substrate.
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