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Cartridge with data memory system and method regarding same

DC
  • US 5,318,370 A
  • Filed: 11/17/1992
  • Issued: 06/07/1994
  • Est. Priority Date: 11/17/1992
  • Status: Expired due to Term
First Claim
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1. A printing apparatus comprising:

  • a printing machine having a thermal printing head energized in response to signals from a printing machine circuitry;

    a tape cassette releasably attachable to said machine and having a tape for receiving an image generated by reason of said energizing of said thermal printing head;

    a memory circuit component carried on said tape cassette and including at least a first and a second memory address, said first memory address containing a first value, said second memory address containing a second value derived from applying a predetermined algorithm to said first value;

    said machine circuitry including contact means for connecting said memory circuit component to said machine circuitry;

    said machine circuitry further including means for reading said first value and applying said algorithm to said first value to generate a test value and then comparing said test value to said second value.

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