Authentication process
AssigneeXerox Corporation
InventorsJames M. Duff, H. Bruce Goodbrand, David L. Hecht
Life of this patent
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Abstract
A process for the authentication of documents which comprises generating developed documents in an electophotographic apparatus, or in a laser printer with an encapsulated toner comprised of a core comprised of polymer, an optional pigment, and an infrared emitting component, and thereover a polymeric shell; and subjecting the document to an infrared reader whereby the infrared component is detected spectroscopically.
Claims24
A process for the authentication of documents consisting essentially of generating developed documents in an electrophotographic apparatus, or in a laser printer with an encapsulated toner comprised of a core comprised of polymer, an optional pigment, and an infrared emitting component, and thereover a polymeric shell;
- and subjecting the document to an infrared reader whereby the infrared component is detected spectroscopically.
A process for determining the authenticity of documents which comprises generating documents in an electrophotographic apparatus, wherein latent images are initially formed followed by development with an encapsulated toner comprised of a core comprised of a polymer, pigment particles, and an infrared emitting dye selected from the group consisting of 3,3'-diethylthiatricarbocyanine, 5,5'-dichloro-11-diphenylamino-3,3'-diethyl- 10, 12'-ethylene-thiatricarbocyanine perchlorate, and anhydro-11-(4-ethoxycarbonyl-1-piperazinyl)-10,12-ethylene-3,3,3', 3'-tetraethyl- 1,1 '-di(3-sulopropyl)-4,5,4',5'-dibenzoindotricarbocyanine hydroxide, and thereover a polymeric shell;
- transferring the images developed to a supporting substrate, and fusing the images thereto;
- and subjecting the documents formed to an infrared reader whereby the infrared dye component is detected by measuring the emitted infrared light from the toned area.
A process for the authentication of documents consisting essentially of generating developed documents with an encapsulated toner comprised of a core comprised of polymer, a pigment and an infrared emitting component, and thereover a polymeric shell;
- and subjecting the document to an infrared reader.
Dependencies are inferred from the claim text.