Developing stage
Toner cartridge
Step 3: In the toner cartridge, the developing cylinder comes in contact with the photosensitive drum to
deposit toner onto the electrostatic latent image.
Figure 1-20 Toner cartridge
Blade
Photosensitive drum
Unexposed area
Exposed area Unexposed area
Exposed area
Developing roller
Developing bias
Toner acquires a negative charge from the friction that occurs when the developing roller rotates
against the developing blade. The developing bias is applied to the developing roller to make a
potential difference between the developing roller and the photosensitive drum. The negatively charged
toner is attracted to the latent image on the photosensitive drum because the drum surface has a higher
potential.
ENWW
Image-formation system
31
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