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Apparatus and methods of detecting relative position of RF signature on print media

  • US 7,249,819 B2
  • Filed: 09/13/2004
  • Issued: 07/31/2007
  • Est. Priority Date: 09/13/2004
  • Status: Active Grant
First Claim
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1. A radio frequency signature position detecting apparatus comprising:

  • a printer assembly with a print media pathway through which print media is fed;

    a radio frequency interrogating device that is angled with respect to the direction of travel of said print media;

    a print media sensor;

    a print controller that calculates the time differences between when said print media sensor detects a cut sheet of print media as having reached a designated point along said print media pathway and when said radio frequency interrogating device detects a radio frequency signature embedded in said print media;

    said print controller using the time differences and the known angle between the radio frequency interrogating device and the print media sensor to calculate the relative left/right position of said radio frequency signature.

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