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The copier's image formation block con-
sists of the following steps; see the descrip-
tions for each step given under its respective
heading:
Step 1: pre-exposure
Step 2: primary charging (-)
Step 3: image exposure
Step 4: development (AC + DC bias)
Step 5: transfer (-)
Step 6: separation (+)
Step 7: fixing
Step 8: drum cleaning
The photosensitive drum consists of two
layers: the outer layer being a photoconduc-
tive layer made of organic photoconductor
(OPC) and inner layer, a substrate made of
aluminum (conductor).
—_ Photoconducting
layer
S
"substrate
Figure 2-103
2-2
COPYRIGHT © 1995 CANON INC,
B. Static Latent Image
Formation Biock
These images created by negative
charges are not visible to the human eye
and, therefore, are called static latent
images.
-500
Dark area
Surface
potential
(V)
oe
-1000}
Primary
charging
Image exposure
(step 1)
(step 2)
Figure 2-104
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