In a laser printer an image of the sheet to be printed it transferred by a laser beam onto a statically charges rotating drum. The drum is a photoreceptor, and the static charge is removed from areas on the drum which have been hit by the laser. Toner (or dry ink) particles are then transferred onto the surface of the drum, where they are held in place by the electrostatic charge. The image is then transferred to paper (the paper has a higher charge than the drum), and the image is made permanent by passing through heated rollers, which fuse the ink to the paper. More information: click here for more…