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40930701TH DRAFT Vesion 35 /
(6) Transfer
The transfer roller is composed of conductive sponge material and is designed to make the
image drum surface and the paper closely into contact.
Paper is placed over the image drum surface, and a positive charge, opposite in polarity to
the toner, is applied to the paper from its reverse side.
The application of a high positive voltage from the power supply to the transfer roller causes
the positive charge induced to the transfer roller surface to be transferred to the paper at the
contact between the transfer roller and the paper. As a results, toner charged negative that
is attracted to the image drum surface is transferred to the upper side of the paper by the
positive charge on the lower side of the paper.
Transfer roller
Paper
Image drum
Power
supply