Electrostatics

The Laser Printer

What it is

The Laser printer is a printer which uses a light-sensitive drum to create an image.

HOW IT WORKS

Since laser printers use a light-sesitive drum to operate, the drum needs to first be charged, which is usually negative (could be both negatively and positively charged however its depends on how you manipulate the drum) (Smith). When charged, and image is projected onto the drum. The areas exposed to light ooze away whereas the darker areas, which were not exposed are left on the drum (Smith). The drum is now coated with a positively charged toner which stick to the negatively charged areas of the drum. Paper is given a negative charge and goes along the drum where the image, produce by electrostatics, is transferred onto it ("How do Laser Printers Work?")

FUN FACTS!!!!

-PAPER HAS TO BE DISCHARGED SO IT DOESN'T STICK TO THE DRUM (How do Laser Printers Work?)

-TONER IS HEATED CAUSING IT TO BIND WITH THE FIBERS IN THE PAPER, MAKING LASER PRINTING A FOR OF CHEMICAL CHANGE (Harris)


-A DRUMS PHOTOSENSITIVITY CAN BE DAMAGED DUE TO OVER EXPOSURE TO LIGHT ("How does a Laser Printers work?")

Gary Starkweather

The creator of the laser printer, which he created in 1969 (chronology of personal computers). Gary was born January 9, 1938. Gary's aim was to create a printer which could replicate and image off of a computer, printers at that time were very limited and Starkweather wanted to overcome that. At the time, Gary was working for Xerox and he generated billions of dollars for the company with this invention. (Invent Now)
Copier: A playful look at how it works

Refrences

Smith, S.E. Wise Geek. Conjecture Corporation, 2013. Web. 12 Feb. 2013.


Invent Now. National Inventors Hall of Fame, 2012. Web. 20 Feb, 2013


Chronology of Personal Computers. Ken Polsson, 27 Sep. 2012. Web. 12 Feb. 2013


"How does a Laser Printer Work?" Consumer Choice. International Imaging Technology Council. N.A. Web. 20 Feb, 2013.


Harris,Tom. "How Laser printers work." HowStuffWorks. Discovery Company, n.d. Web. 13 Feb. 2012