ENWW Chapter 5 Theory of operation 91
Developing block
The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the
electrostatic latent image.
Note The charges on the exposed area of the drum are shown as positive in figure 22. The charges are
actually negative, but they are more positive than the charges on the developing cylinder.
Figure 22. Developing block
Step 3: developing
Toner acquires a negative charge through friction from the developing cylinder and the blade.
When the negatively charged toner comes in contact with the drum, the toner adheres to the
electrostatic latent image. The image on the drum becomes visible because of the toner.
Figure 23. Step 3: developing
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