Paper Transfer Unit Mechanism; Ptr (Paper Transfer Roller) Drive; Ptr (Paper Transfer Roller) Contact And Separation - Ricoh MP C2504 Field Service Manual

7. Detailed Descriptions
[A]: Toner collection coil
[B]: Image transfer belt
[C]: Image transfer cleaning blade
[D]: Toner collection coil

Paper Transfer Unit Mechanism

Paper Transfer Mechanism
A bias is applied to the ITB drive roller to transfer the image on the image transfer belt to the paper
(repulsion transfer). As there is no paper between the image transfer roller and toner image, this method
is not easily affected by paper conditioning.
Also, toner adsorption on the paper is facilitated by the static charge eliminator of the paper transfer unit
(no charge is applied).

PTR (Paper Transfer Roller) Drive

The rotation of the paper transfer roller follows that of the ITB drive roller.

PTR (Paper Transfer Roller) Contact and Separation

If the paper transfer roller is permanently in contact with the image transfer belt, toner on the Image
transfer belt moves to the roller and soils the underside of the paper surface, therefore the Paper transfer
roller is separated during process control or MUSIC control (it is not separated during real-time process
control).
Separation of the paper transfer roller is achieved by transmitting the drive of the paper transfer contact
motor via the ITB unit joint.
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