CA2163488A1 - Multicolor Heat-Sensitive Verification and Highlighting System - Google Patents

Multicolor Heat-Sensitive Verification and Highlighting System

Info

Publication number
CA2163488A1
CA2163488A1 CA 2163488 CA2163488A CA2163488A1 CA 2163488 A1 CA2163488 A1 CA 2163488A1 CA 2163488 CA2163488 CA 2163488 CA 2163488 A CA2163488 A CA 2163488A CA 2163488 A1 CA2163488 A1 CA 2163488A1
Authority
CA
Canada
Prior art keywords
heat
application
under
coating
substantially colorless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2163488
Other languages
French (fr)
Other versions
CA2163488C (en
Inventor
John C.H. Chang
Eric B. Wendler
Vance P. Gregory, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wallace Computer Services Inc
Original Assignee
Wallace Computer Services Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/416,283 external-priority patent/US5618063A/en
Application filed by Wallace Computer Services Inc filed Critical Wallace Computer Services Inc
Publication of CA2163488A1 publication Critical patent/CA2163488A1/en
Application granted granted Critical
Publication of CA2163488C publication Critical patent/CA2163488C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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.
CA 2163488 1995-04-04 1995-11-22 Multicolor heat-sensitive verification and highlighting system Expired - Fee Related CA2163488C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/416,283 1995-04-04
US08/416,283 US5618063A (en) 1992-12-09 1995-04-04 Multicolor heat-sensitive verification and highlighting system

Publications (2)

Publication Number Publication Date
CA2163488A1 true CA2163488A1 (en) 1996-10-05
CA2163488C CA2163488C (en) 2001-01-30

Family

ID=23649340

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2163488 Expired - Fee Related CA2163488C (en) 1995-04-04 1995-11-22 Multicolor heat-sensitive verification and highlighting system

Country Status (1)

Country Link
CA (1) CA2163488C (en)

Also Published As

Publication number Publication date
CA2163488C (en) 2001-01-30

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