Discovering Computers 2005

Printers

How does a laser printer work?

p. 310 Fig. 6-24

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Step 1. After user sends an instruction to print a document, drum rotates as gears and rollers feed sheet of paper into printer.

Step 3. Laser beam creates a charge that causes toner to stick to drum.

Step 4. As drum continues to rotate and press against paper, toner transfers from drum to paper.

Step 5. Set of rollers uses heat and pressure to permanently fuse toner to paper.

Step 2. Rotating mirror deflects low-powered laser beam across surface of drum.