Image Transfer And Paper Separation; Overview - Gestetner A193 Service Manual

IMAGE TRANSFER AND PAPER SEPARATION

6. IMAGE TRANSFER AND PAPER
SEPARATION
[B]

6.1 OVERVIEW

[C]
[A]
A193D538-2.wmf
[D]
[A]
A193D021.wmf
Instead of using a transfer wire and a transfer belt, this machine uses a
transfer roller [A], is in contact with the surface of the drum.
The high voltage supply board [B] supplies a positive current (approximately
+15 µA) to the transfer roller. The roller has a high electrical resistance, so it
can hold a high positive electrical potential to attract toner from the drum's
surface onto the paper.
There is a discharge brush [C] after the transfer roller. The cobination of the
curvature of the drum and the discharge brush helps the paper to drop away
from the drum.
The vacuum transport fan [D] located under the transport guide plate helps
to transport the paper from the transfer area into the fusing unit.
(A193) 2-54 SM