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Thermal printer and components

  • US 9,950,541 B2
  • Filed: 05/26/2016
  • Issued: 04/24/2018
  • Est. Priority Date: 05/29/2015
  • Status: Active Grant
First Claim
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1. A thermal printer, comprising:

  • a thermal print head for printing barcodes and alphanumeric information on a web of record members;

    a stepper motor that is responsive to a periodic drive signal to advance the web of record members past the print head for printing wherein the drive signal controls speed of the stepper motor;

    a controller that comprises a microprocessor which operates in accordance with software routines stored in a memory so as to control operations of the bar code printer;

    a plurality of sensors, monitors, and detectors to monitor operating conditions of the bar code printer;

    a frame comprising a female receptor with a matched slot for receiving a radial pin; and

    a platen roller with a bayonet connector and a vertical spring that aligns a shaft of the platen roller and depresses for insertion into the slot and then is pushed upwards into the slot, such that the bayonet connector is no longer free to rotate unless pressure is depressed against the vertical spring to release it from the slot.

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