Developing stage
Print cartridge
Step 3: In the print cartridge, the developing cylinder transfers toner onto the electrostatic latent image
on the photosensitive drum.
Figure 1-18 Print cartridge
Blade
Developing cylinder
AC bias
DC bias
Photosensitive drum
Unexposed area
Exposed area
Exposed area
Unexposed area
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 25