Within the laser printer cartridge there is a drum that slowly turns. As it turns it is given a charge by a wire (charge corona wire) or, in some cases, another roller. After the drum is charged the printer shoots a laser at the surface of the drum discharging the drum in certain places. These places end up looking like letters and numbers on the drum.
To get these discharged letters and number shapes off the drum and onto a piece of paper the laser printer covers the discharged shapes with charged toner. It then hooks them up with an oppositely charged piece of paper. It makes sense that the toner is attracted to the paper and there it is, toner on paper. If you have ever changed a toner cartridge you can attest that the stuff loves to attach itself to just about anything. The process so far just makes the toner attach itself in an ordered fashion or letter and numbers.
Getting toned
The process is just about complete at the most basic level. What needs to happen to finish off the process is for the toner to be fused into the paper permanently. To accomplish this the laser printer rolls the paper by a heat roller to melt the toner into the fibers of the paper. As the laser printer does this it real eases the charge with yet another roller.
Ultimately, when the process is in synch there is no muss and no mess. But everything needs to be timed just right. In the end, there is a warm static free piece of paper with all the words fit and unfit to print.
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