Incremental printing of symbolic information – Thermal marking apparatus or processes – With recording medium
Patent
1996-03-06
1997-07-01
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
With recording medium
503201, 503204, 503206, 283 67, 283 91, 283 94, 283 95, B41M 528, B41M 530, B41J 232
Patent
active
056443528
ABSTRACT:
A document capable of providing multiple colors under the application of heat comprising a support having at least one surface bearing a first coating comprising a substantially colorless, heat activatable chromogenic composition capable of producing a first color under the application of heat, and a second coating comprising a localized coating of a substantially colorless, heat activatable chromogenic composition capable of producing a second color under the application of heat. Each chromogenic composition comprises a chromogenic compound and a color developer that are substantially colorless solids in physical contact prior to reaction, but which can chemically react to produce a visible colored image by application of heat at temperatures above room temperature. Under the application of heat from a thermal printer, by quickly striking the chromogenic composition with a fingernail or blunt object to produce frictional heat, or other heat application, multicolored images are provided.
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Chang John C. H.
Gregory, Jr. Vance P.
Wendler Eric B.
Tran Huan H.
Wallace Computer Services Inc.
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