Thermal Printers

They produce text and images by heating specially coated thermal paper and are used in point-of-sale systems, petrol pumps, and so on.

Thermal Printer Parts

Thermal head: This generates the heat and takes care of printing to the paper.

Platen: This is the rubber roller that feeds the paper past the print head.

Spring: Applies pressure to the print head, which brings the print head into contact with the paper.

Circuit board: Controls the mechanism that moves the print head.

Print process

  • Thermal paper is inserted between the thermal head and the platen.
  • Printer sends current to the thermal head, which in turn generates heat.
  • Heat activates the thermo-sensitive layer of the thermal paper, which becomes the image.

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