Process for the authentication of documents utilizing encapsulated toners
AssigneeXerox Corporation
InventorsH. Bruce Goodbrand, James M. Duff, Raymond W. Wong
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, pigment, and an infrared absorbing component, and thereover a polymeric shell; and subjecting the document to an infrared reader whereby the near infrared absorbing component is detected spectroscopically.
Claims3
A process for the authentication of documents which comprises generating developed documents in an electrophotographic apparatus, or in a laser printer, with an encapsulated toner comprised of a core comprised of polymer, pigment, and an infrared absorbing component, and thereover a polymeric shell;
- and subjecting said documents to an infrared reader whereby said infrared absorbing component is detected spectroscopically.
A process for avoiding the copy of documents which comprises generating said documents entirely or in selected areas with an encapsulated toner comprised of a core comprised of polymer, pigment, and an infrared absorbing component, and thereover a polymeric shell, and thereafter scanning the reflected light from said documents whereby there is detected spectroscopically said infrared absorbing component.
A process for determining the authentication of documents comprised of a supporting substrate and developed images thereover 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 absorbing component, and thereover a polymeric shell;
- transferring the images developed to a supporting substrate, and fusing the images thereto;
- and subjecting said documents comprised of said supporting substrate and developed images thereover formed to an infrared reader whereby said infrared absorbing component is detected spectroscopically.
Dependencies are inferred from the claim text.