Canon imageRUNNER C1335 Series Service Manual page 83

2
Technical Explanation > Image Formation System > Controls > Transfer/Separation
● Secondary Transfer Outer Roller Cleaning Control
Soiling at the back of the sheet caused by soiling of the Secondary Transfer Outer Roller can
be prevented.
Control timing
1) When image stabilization control (generation of patch image on the ITB) is executed
during warm-up rotation
2) At last rotation
3) After executing the image stabilization control (generation of patch image on the ITB)
Control description
The secondary transfer cleaning bias (DC minus + DC plus), which has been generated
on the Secondary Transfer High-voltage PCB (UN02), is applied to the Secondary Transfer
Outer Roller.
Residual toner on the Secondary Transfer Outer Roller is attached to the ITB, and then
collected by the ITB Cleaning Unit.
M02 Bk Drum
Waste Toner
Feed Screw
ITB Cleaning Blade
2 Technical Explanation > Image Formation System > Controls > Transfer/Separation
_ ITB Motor
Secondary Transfer
Inner Roller
Cleaning Residual
toner
Bias
Secondary Transfer
Outer Roller
F-2-75
● Separation
This control separates paper from the ITB by elastic force of the paper (curvature separation
method).
In the case of thin paper which has low elastic force, the Static Eliminator removes positive
potential at the back of the paper.
This reduces electrostatic absorption force of the paper so that paper can be easily
separated.
Secondary Transfer
Inner Roller
2-52
Static Eliminator
Secondary Transfer
Outer Roller
F-2-76
2-52