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System and method for indicating the location of a benchmark

  • US 5,331,173 A
  • Filed: 12/24/1992
  • Issued: 07/19/1994
  • Est. Priority Date: 12/24/1992
  • Status: Expired due to Term
First Claim
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1. In an optical scanning system including a dash code scanner for scanning a benchmark code printed on a document being transported through a paper handling machine, an improvement to initializing the optical scanning system relative to the location of the benchmark code in an electrically adjustable benchmark window, the improvement comprising:

  • means for sensing a lead edge of a benchmark window;

    scanner means for detecting a benchmark code;

    means for generating a first signal beginning at the lead edge of the benchmark window and ending at the detection of the benchmark code;

    means for deriving a count indicative of a number of encoder pulses between the lead edges of the benchmark window and the benchmark code; and

    means for displaying said count on an LED display.

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