Image Drum - What is an image drum?
A component found in ion deposition printers, laser printers, xerographic printers, and photocopiers.
An image drum is the image carrier or imaging device used in some non-impact methods of printing. The image being printed is created on the surface of the image drum, which then transfers toner onto the substrate in the correct position to form the final printed image.
The image is made up of a pattern of charged and neutral areas on the surface of the drum; this is accomplished by charging a photoconductive drum and then using light to discharge or reverse the charge of specific areas of the drum, or by depositing charged ions onto a nonconductive drum in the required pattern.
Static electricity causes toner (which has been given the opposite charge to the drum) to be attracted or repelled by the remaining charges on the drum to form the final image, which is then transferred to the substrate.
Image drums may also be refered to as imaging drums, drum units, photoreceptors, or cyclinders. In some machines, a belt is used instead of a drum.Go Back to Glossary