Developing block
Step 4: In the print cartridge, 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 create a difference in the electric potential of the drum. When the negatively charged toner comes in
contact with the photosensitive drum, it adheres to the latent image because the drum surface has a higher
potential.
Figure 1-17 Developing
Developing bias
Photosensitive drum
Developing roller
Developing blade
30 Chapter 1 Theory of operation ENWW
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