Look a little closer
See the mechanism
The electrical image becomes a powder image
Read the diagram steps
Expose and develop. The charged drum loses charge in exposed areas. A developer supplies toner to the intended image locations; the laser path ends on the drum.
Transfer and fix. Electrostatic transfer moves the toner pattern onto the sheet. The separate fixing nip applies heat and pressure to adhere toner to paper.
Original functional schematic; dimensions and motion are exaggerated, not measured. Monochrome exposed-area development. No universal charge polarity, exact station geometry or color-engine arrangement is implied.
Diagram basis: Canon: How laser printers work.
Sources: Canon
Exposure changes the drum
The drum is charged before the laser scans it. In the process Canon describes, illuminated areas lose charge. That difference forms an invisible electrical image corresponding to the requested marks.
Sources: Canon
Toner moves from drum to paper
Toner contains pigment in tiny resin particles. The developer brings this powder to the drum, where it remains in the intended image areas. Electrostatic forces then transfer it onto the sheet. The paper carries a visible image, but the loose toner still has to be fixed.
Sources: Canon
Heat and pressure finish the print
At the fixing stage, heat melts the toner resin while pressure presses it against the paper. Once fixed, the image is bonded to the sheet. Exposure chooses the pattern, development supplies the marking material, and fixing makes that material stay.
Sources: Canon
The thing to remember
Light patterns charge; toner supplies the mark; the fixing stage bonds it to paper.
What this example leaves out
This is a simplified monochrome electrophotographic sequence. Charge polarities, transfer arrangements and color systems differ.
Sources & further reading
Source access dates are listed below. Manufacturer descriptions and patents support the specific constructions described, not every product.
- Laser Printers and MFPs ↗
Canon · Retrieved 2026-10-18 · Charge, laser exposure, toner development, transfer and heat/pressure fixing.
Read How laser printers work and Electrophotographic printing. Selected exposed-area development explanation; no universal charge-polarity or color-engine layout claim.
