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Thermal printer

  • US 4,591,876 A
  • Filed: 09/27/1982
  • Issued: 05/27/1986
  • Est. Priority Date: 10/02/1981
  • Status: Expired due to Term
First Claim
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1. A thermal printer comprising:

  • a thermal head of one of at least two types having a plurality of heater elements and respective different operating characteristics, said thermal head being removably mountable to the printer;

    driver means operable in response to a print signal for driving said heater elements;

    detection means for detecting the type of said thermal head mounted to the printer; and

    control means for controlling the heating of a first type of said thermal head in dependence on a first ambient temperature vs. power characteristic curve when said detection means detects that said first type of thermal head is mounted to the printer and for controlling the heating of a second type of said thermal head in dependence on a second ambient temperature vs. power characteristic curve when said detection means detects that said second type of thermal head is mounted to the printer so that said first and second types of thermal head print with substantially the same print density.

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