How a Laser Printer Works

1. Data streamed from a computer to the printer
2. The corona wire creates a positive static charge on the photo receptor drum so that the drum has a uniform positive charge
3. The circuit activates the laser which draws the image onto the drum
4. An ink roller touching the photo receptor drum coats it with tiny powder (toner) which sticks to the roller because of the charge
5. A sheet of paper is brought up from a hopper and is fed up towards the drum which is given a strong negative charge by another corona wire
6. When the paper and the roller meet, the charges attract and the charged particles stick to the paper
7. The paper pass through the hot rollers which applies pressure and heat fusing the powder to the paper permanently
8. The printed paper is then dispensed