Laser Printers and how they work
Basically, a high precision laser copies images onto a selenium coated drum which has a positive charge.
The laser reflects off of a mirror and onto the drum, which rolls and copies it onto the paper, which then has a positive charge.
Then after the image is on the paper, the paper passes through heated rollers which melts the image onto the paper and the paper comes out still hot.
This is a laser printer from the company Dell
This is a small diagram of what goes on inside the printer
Invented the xerographic process in 1998