Figure 4-7 Print cartridge structure
Transfer belt (ETB)
The ETB unit feeds paper as well as transfers toner onto the paper.
The ETB unit consists of the ETB, ETB feed roller, ETB driven roller, and color misregistration/
density sensor unit.
As the main motor rotates the ETB feed roller, the ETB feed roller rotates the ETB belt. The transfer
roller and the ETB driven roller are engaged with the ETB.
During printing, the picked up paper is conveyed in between the ETB and the photosensitive drum,
and simultaneously the toner image is transferred onto the paper. The ETB is also used for color
misregistration corrective control and the image stabilization control. The pattern image for the color
misregistration or image density determination is transferred onto the belt. This pattern image is read
in the color misregistration/density sensor unit.
The following is the diagrammatic sketch of the ETB unit.
ENWW Image formation system 47
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