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Printer cartridge including infrared absorbing ink

  • US 7,364,282 B2
  • Filed: 10/13/2004
  • Issued: 04/29/2008
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. A cartridge for a printer, the cartridge comprising:

  • a housing defining a plurality of storage areas;

    wherein,at least one of the storage areas contains a visible colorant for the printer to print information that is visible to the human eye; and

    ,at least one of the storage areas contains infrared absorbing ink for the printer to print information that is invisible to the human eye but can be read by an optical reader device.

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