Sequence Of Operations (Measurement) - Canon CLC 1120 Service Manual

5. Sequence of Operations (measurement)

Patch detection using the Bk toner sensor to determine the amount of toner to supply is
executed for each copy as follows:
1. When copying on side B, a patch is formed in the area that faces the linking plate along the
trailing edge of the image.
2. When copying on side B, a patch is formed in the area that faces the linking plate along the
leading edge of the image.
Developer
Side of transfer drum
Image on photosensitive
drum
Measurement by Bk
sensor
COPYRIGHT © 1999 CANON INC.
INTR
Figure 6-408 Using Side B
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
COPY
Bk
n
The concentration of toner on the pho-
tosensitive drum is measured, and
an amount of toner to supply is deter-
mined based on the measurement.
Bk
n+4
6-39