What is printer drum unit
- hp 304 ink, ink cartridge, printer ink
- 26 Feb, 2021
The drum unit is an essential part of any laser printer that transfers toner to the surface of the paper. Without it, any printout would be impossible. How it's working? The surface of the drum is covered with a photosensitive material. The drum is positively or negatively charged and therefore attracts toner particles. The pressure and temperature that occurs causes the toner to stick to the sheet of paper.