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For each process color, the CLClOOO uses
one set of components; i.e., photosensitive drum,
developing assembly, cleaning unit. (In other
words, four sets are used for full color reproduc-
tion.)
The CLClOOO's photosensitive drum consists
of a photo-conductive layer on the other side
(OPC) and a conductive aluminum substrate on
the inside.
The CLClOOO differs from black-and-white
copiers for the following:
Light is shined on a color original, and the
reflected light is separated by filters into the three
primary colors of light for conversion by a CCD.
Using analog video signals (RGB) from the
CCD, video signals are generated for each
process color (YMCK) to drive a semiconductor
laser.
A laser beam is directed to the appropriate
photosensitive drum to develop the image repre-
senting the corresponding process color (of toner;
complementary to the corresponding filter) for
transfer to copy paper; the step is executed alike
for Y, M, C, and K.
The resulting image is fixed to the paper, pro-
ducing a color copy of the original.
The
uses four photosensitive drums
for transfer of images to copy paper, and a trans-
fer belt is used to ensure that copy paper is
moved horizontally under each photosensitive
drum for transfer
COPYRIGHT 0 1997 CANON INC.
The image formation block consists of the fol-
lowing eight steps:
Step 1
Pre-exposure
Step 2
Primary charging
Step 3 Laser exposure
Step 4 Development
Step 5 Retention/transfer
Step 6 Separation
Step 7 Fixing
Step 8
Photosensitive drum cleaning
Auxiliary processes include pre-primary charg-
ing, pre-fixing charging, and transfer belt clean-
ing/static elimination.
8. Drum cleaning
Figure 2-102
CANON CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
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