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
1997-01-21
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...
283 67, 283 90, 503204, 503206, 503215, B41M 5165, B41M 530
Patent
active
055959555
ABSTRACT:
A pressure and heat-sensitive composition comprising chromogen-containing pressure-rupturable microcapsules and heat-sensitive color developer useful for verification of document authenticity system when applied as a localized coating on documents, such as checks and prescriptions. Quickly striking the chromogenic composition with a fingernail or blunt object to generate pressure and heat in the coating produces a colored image by friction. The chromogenic composition possesses a fugitive characteristic, whereby the colored image gradually disappears and can be made to reappear when the chromogenic coating is again subjected to external pressure and heat. This feature can be used for repeated verification of the authenticity of the document.
REFERENCES:
patent: 2929736 (1960-03-01), Miller et al.
patent: 3713861 (1973-01-01), Sharp
patent: 3829133 (1974-08-01), Smagala-Romanoff
patent: 4037007 (1977-07-01), Wood
patent: 4109047 (1978-08-01), Fredrickson
patent: 4140733 (1979-02-01), Meyer, Jr. et al.
patent: 4175774 (1979-11-01), Tonges et al.
patent: 4183989 (1980-01-01), Tooth
patent: 4186020 (1980-01-01), Wachtel
patent: 4197346 (1980-04-01), Stevens
patent: 4210346 (1980-07-01), Mowry, Jr. et al.
patent: 4303307 (1981-12-01), Tureck et al.
patent: 4360548 (1982-11-01), Skees et al.
patent: 4425386 (1984-01-01), Chang
patent: 4520378 (1985-05-01), Matsushita et al.
patent: 4726608 (1988-02-01), Walton
patent: 4839396 (1989-06-01), Tusim
patent: 4846502 (1989-07-01), Chang et al.
patent: 4873219 (1989-10-01), Brown et al.
patent: 5132034 (1992-07-01), Hsu et al.
patent: 5212219 (1993-05-01), Griffin
patent: 5338066 (1994-08-01), Gundjian
patent: 5344191 (1994-09-01), Chang et al.
patent: 5354723 (1994-10-01), Gundjian
patent: 5427415 (1995-06-01), Chang
Research Disclosure (No. 187), Nov. 1979, pp. 638-639.
Chang John C. H.
Johnson Richard H.
Hess B. Hamilton
Wallace Computer Services Inc.
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