Laser printers ware invented at XEROX in 1969 by by researcher Gary Starkweather.Laser Printers are digital printing devices that are used to create high quality text and graphics on plain printer.
Working Principle
1)A laser beam projects an image of the page to be printed onto an electrically charged rotating Photo sensitive drum coated with selenium.
2) Photo conductivity allows charge to leak away from the areas which are exposed to light and the area gets positively charged.
3)Toner particles are then electrostatically picked up by the drum’s charged areas, which have been exposed to light.
4)The drum then prints the image onto paper by direct contact and heat, which fuses the ink to the paper.
1)A laser beam projects an image of the page to be printed onto an electrically charged rotating Photo sensitive drum coated with selenium.
2) Photo conductivity allows charge to leak away from the areas which are exposed to light and the area gets positively charged.
3)Toner particles are then electrostatically picked up by the drum’s charged areas, which have been exposed to light.
4)The drum then prints the image onto paper by direct contact and heat, which fuses the ink to the paper.
