Claims
- 1. A document capable of providing information under the application of heat, which comprises:
- a first support having a first surface and a second surface, said first surface bearing an information area including a visible principal image, and at least one of said first or second surfaces bearing at least one localized coating comprising a substantially colorless, non-pressure sensitive, heat-activatable chromogenic composition capable of producing a first color under the application of heat,
- said chromogenic composition comprising a chromogenic compound and a color developer,
- said chromogenic compound and said color developer being 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,
- said information area being substantially free of chromogenic compounds, and free of color developers capable of reacting with chromogenic compounds to produce a visible colored image by application of heat.
- 2. The document of claim 1, wherein said first surface of said first support bears a single localized coating of said heat-activatable chromogenic composition.
- 3. The document of claim 2, wherein said second surface of first substrate is provided with a localized coating of a substantially colorless, non-pressure sensitive, heat-activatable chromogenic composition capable of producing a second color under the application of heat.
- 4. The document of claim 3, wherein said first color and said second color are the same colors.
- 5. The document of claim 3, wherein said first color and said second color are different colors.
- 6. The document of claim 3, in which said first color is black and said second color is red.
- 7. The document of claim 2, wherein said second surface of said first support is provided with a coating of a pressure sensitive adhesive.
- 8. The document of claim 1, wherein said second surface of said first support bears a localized coating of said heat-activatable chromogenic composition.
- 9. The document of claim 1, wherein said localized coating of a substantially colorless, non-pressure sensitive, heat-activatable chromogenic composition is heat-activatable at a temperature in the range of between about 40.degree. C. and about 200.degree. C.
- 10. The document of claim 1, wherein a second support is provided having a third surface and a fourth surface, which is opposite said third surface, said at least one localized coating of said heat-activatable chromogenic composition being coated on said third surface of said second support, said fourth surface being adhered to said first substrate, said localized coating and said second support being coextensive.
- 11. The document of claim 10, wherein said second support is substantially completely recessed in a complementary, localized recessed portion of the first surface of said first substrate such that said third surface of said second support and the non-recessed portions of said first surface of said first support are at substantially the same level, such that said coated third surface of said recessed second support and said non-recessed portions of said first support cooperate to provide a substantially smooth surface, said fourth surface of said second support being adhered to the recessed portion of said first surface of said first support, said second support and said at least one of said localized coatings being substantially co-extensive.
- 12. The document of claim 11, wherein said localized coating of said heat-activatable chromogenic composition is heat-activatable at a temperature in the range of between about 40.degree. C. and about 200.degree. C.
- 13. The document of claim 11, wherein said at least one coating of said heat-activatable chromogenic coating is coated with a substantially transparent heat-resistant topcoat.
- 14. The document of claim 11, wherein said first surface of said first support bears a single localized coating and said second surface of said first support is provided with a coating of a pressure sensitive adhesive.
- 15. The document of claim 11, wherein said second surface of said first support is provided with a coating of a pressure sensitive adhesive.
- 16. The document of claim 11, wherein said second surface is provided with at least one localized coating comprising a substantially colorless, heat-activatable chromogenic composition capable of producing a second color under the application of heat.
- 17. The document of claim 10, wherein said at least one coating of said heat-activatable chromogenic coating is coated with a substantially transparent heat-resistant topcoat.
- 18. The document of claim 1, wherein said first substrate is a in the form of a continuous roll.
- 19. The document of claim 1, wherein said heat-activatable coating includes a temperature suppressant material.
- 20. A printing system for producing printed documents on demand comprising
- a heated metal element for producing a visible image upon application of heat,
- a document capable of providing information under the application of heat, which comprises a first support having a first surface and a second surface, said first surface bearing an information area including a visible principal image and at least one localized coating comprising a substantially colorless, non-pressure sensitive, heat-activatable chromogenic composition capable of producing a first color under the application of heat,
- said chromogenic composition comprising a chromogenic compound and a color developer,
- said chromogenic compound and said color developer being 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,
- said information area being substantially free of chromogenic compounds, and free of color developers capable of reacting with chromogenic compounds to produce a visible colored image by application of heat;
- said heated metal element forming a visible, colored image upon contact with said localized coating.
- 21. The printing system of claim 20, wherein said heated metal element is a printing stylus.
- 22. A method of printing a document, said document comprising
- thermally activating a document capable of providing multiple colors under the application of heat utilizing a heated printing stylus, said document comprising
- a first support having a first surface and a second surface, said first surface bearing an information area including a visible principal image, and at least one of said first and second surfaces having at least one localized coating comprising a substantially colorless, non-pressure sensitive, heat-activatable chromogenic composition capable of producing a first color under the application of heat,
- said chromogenic composition comprising a chromogenic compound and a color developer,
- said chromogenic compound and said color developer being 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,
- said information area being substantially free of chromogenic compounds, and free of color developers capable of reacting with chromogenic compounds to produce a visible colored image by application of heat;
- thereafter applying heat to at least one of said first or second coatings of said heat-activatable chromogenic composition to form a visible colored image.
- 23. The method of claim 22, wherein heat is applied by a heated metal element.
- 24. The method of claim 23, wherein said heated metal element is a printing stylus.
- 25. The method of claim 23, wherein heat is applied to said localized heat-activatable coating in the form of a bar code.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation-in-part of U.S. application Ser. No. 08/871,956 filed Jun. 10, 1997, now abandoned, which, in turn, is a continuation of U.S. application Ser. No. 611,855 filed Mar. 6, 1996, now U.S. Pat. No. 5,644,352, which, in turn, is a division of application Ser. No. 08/416,283 filed Apr. 4, 1995 (now U.S. Pat. No. 5,618,063), which, in turn, is a continuation-in-part of U.S. application Ser. No. 07/987,710 filed Dec. 9, 1992 in the name of John C. H. Chang entitled "Heat Sensitive System and Use Thereof", now U.S. Pat. No. 5,427,415, the disclosure of which is hereby incorporated by reference.
Reference is hereby made to U.S. application Ser. No. 07/987,694 filed Dec. 9, 1992 entitled "Hidden Entry System and Use Thereof" to John C. H. Chang and Peter A. Walter, now U.S. Pat. No. 5,344,191, the disclosure of which is hereby incorporated by reference.
US Referenced Citations (13)
Divisions (1)
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Number |
Date |
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Parent |
416283 |
Apr 1995 |
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Continuations (1)
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Number |
Date |
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Parent |
611855 |
Mar 1996 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
871956 |
Jun 1997 |
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Parent |
987710 |
Dec 1992 |
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