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.
- 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.