Laser Printer

Laser printers are used in a wide variety of applications, from office printing, to medical printing, to bar code printing. Laser beam printers print images by drawing an electrostatic image on a photosensitive drum with laser beams and depositing a toner on a portion charged with a static electricity. A laser printer generally comprises a printer body, a developing device disposed in an inside of the printer body with a photoconductive drum, a laser scanning unit projecting a laser beam to the photoconductive drum to form an electrostatic latent image thereon, and a toner supply unit supplying toner to develop the electrostatic latent image formed on the photoconductive drum. Laser printers use a focused light beam to expose discrete portions of an image transfer drum so that these portions attract printing toner. Radiation from a laser is shaped, and imaged onto a media plane to produce a desired spot size.