2. Product Specifications and Description
2.5.4. ITB (Intermediate Transfer Belt) Unit
2.5.4.1. ITB unit overview
The toner on the four drums is moved to the Transfer-ITB by four first transfer rollers.
The image overlapped by four colors is moved to the paper by the second transfer roller. The remaining toners are removed
by the cleaning blade and moved to the waste toner container.
This process is done with one rotation of the ITB. The arrow above the C and M drums on the diagram shows the direction
of ITB rotation. The rotation is made by the friction between the drive roller and transfer belt. The tension roller provides
tension to block slip.
There are three ACR sensor and one photo sensor. Two of them are for the line position adjustment and the other is for
process control. One photo sensor controls the position of the first transfer roller.
1
Image Transfer Belt (ITB)
2
1st Transfer Roller
3
ITB Drive Roller
4
Tension Roller
5
Photo Interruptor
6
Cleaning Blade
7
ACR Sensor
8
2nd Transfer Roller
9
Toner Collection Auger
10
Drum Unit
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