Paper Transfer And Separation - Ricoh B132 Service Manual

6.12.5 PAPER TRANSFER AND SEPARATION

[D]
[C]
This machine employs a repulsive force bias system to transfer the image on the
ITB to paper.
The transfer power pack [A] applies a negative bias to the ITB bias roller [B].
The negative bias from the back side of the ITB applies a repulsive force to the
toner on the ITB surface. This repulsive force pushes the toner from the ITB
surface onto the paper.
The PTR [E] is grounded and provides pressure to the back side of the paper
during paper transfer.
This system has two advantages:
• The moisture in the paper has no effect on the repulsive bias from the front side
of the paper.
• Because the bias is applied from the front side of the paper, the bias can be
applied more effectively, regardless of the level of humidity around the paper.
After the image has been transferred to the paper:
• The paper discharge plate [C] (connected to the separation power pack) applies
an ac charge to neutralize the charges on the paper and the ITB.
• Next, curvature separation at [D] separates the paper from the belt when the ITB
makes its abrupt turn toward the top of the machine for the next copy cycle.
SM
IMAGE TRANSFER AND PAPER TRANSFER
[A]
P . P
[B]
B132D304.WMF
6-97
[E]
B132/B200