Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1994-11-16
1996-07-02
Hess, B. Hamilton
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
503226, B41M 530, B41M 540
Patent
active
055322000
ABSTRACT:
A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising one of a first pair of a color developer and color former dye defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
REFERENCES:
patent: 3788875 (1974-01-01), Schutzner
patent: 3906123 (1975-09-01), Vincent et al.
patent: 4036511 (1977-07-01), Maalouf
patent: 4760048 (1988-07-01), Kurihara et al.
patent: 4837584 (1989-06-01), Sharkey et al.
Patent Abstracts Of Japan, vol. 8, No. 120, Jun. 6, 1984.
Hess B. Hamilton
Nocopi International Inc.
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