3. Transfer stage
Step 4 Transfer (+)
Step 5 Separation
4. Fixing stage
Step 6 Fixing
5. Drum cleaning stage
Step 7 Drum cleaning
Drum cleaning stage
Print delivery
3.2.1
Electrostatic latent image formation stage
This stage has two steps, which together produce a pattern of electrical charges on the
photosensitive drum.
At the end of the stage, negative charges remain in the unexposed "dark" area. Charges are
absent from the "light" areas, where the laser beam struck (exposed) the drum surface.
Since this image of negative charges on the drum is invisible to the eye, it is called an
"electrostatic latent image".
Electrostatic latent image
formation stage
2. Scanning exposure
1. Primary charge
7. Drum cleaning
Fixing stage
5. Separa-
tion
6. Fixing
Transfer stage
Figure 2.7
0
-100
-500
Primary
Scanning
charge
exposure
(step 1)
(step 2)
Figure 2.8
3. Develop
Developing stage
ment
4. Transfer
Registration
Cassette feed
Time (t)
Exposed
area
Unexposed
area
Transfer
Primary
(step 4)
charge
(step 1)
II - 6
Paper path
Direction of drum rotation
Multi-purpose tray feed