History of Laser Printers

Laser printer is a type of printer that uses toner (powdered ink) as a medium for the print data, a portion of the machine resembles a laserjet printer photocopier. With power enough print that can reach more than 10 pieces per minute. And the print quality that resembles the original. Color laser printers have a way of working that is more complex because in addition to having more than one photoreceptor scheme, also to be precise alignment between the colors.

American inventor who inspires a young researcher from Xerox Webster Research Center, Rochester named Gary Starkweather. At that time Gary was sitting in his lab thinks suppose if the printing is done on the computer??. Based on the idea then was born the Laser Printer. But this idea was opposed by Xerox management and requested that Gary stop trying. But do not break the spirit of Gary got there, he then tried another way secretly he continued researching and finally in 1969 the prototype was ready constructed by modifying an existing xerographic. Starkweather finally managed to create a form of laser printer copier with a system that already dimodikasi prncitraan removed and introduced spinning drum with 8 opposite side.

Laser printer behavior

Actual workings similar to a laser printer copier, which uses photographic drum. It works like this:

• First Wire corona discharge of static electricity that makes drum (photo conductor) are positively charged.
• Then, highlighted rays from the laser unit (exposition) on the surface of a rotating drum according to the information obtained from the computer. In this way, the laser drawing letters or images to be printed as a pattern of electrical charges-an image of a negatively charged static electricity.
• Furthermore, toner or ink powder form sprinkled on drums. Because toner is positively charged, it will stick to the negatively charged area on the drum, the area that had been highlighted by the laser beam.
• Insert a piece of paper in the paper tray so that the ground by the drum. Previously, paper given by the negative charge corona wire. Charge is greater than the negative charge of static electricity image so the paper can pull the toner powder is positively charged. Because spinning at the same speed with the rotation of the drum, the paper copy existing image on the drum.
• The paper has been copied image was passed to the fuser, which is a pair of heated rollers. As it passes through the fuser, toner powder melts and hold tightly to the paper fibers. Then the paper was issued to the output tray.
•  After the static image on the drum transferred to the paper, the drum through the light of liberation. Bright spotlight on the entire surface of the photoconductor and remove static electricity image. Then, the drum through the corona wire which gave positive charge back.
• And the process is repeated again for the next printing