Ricoh FT4460, Service Manual, Page: 104 / 413

28 February 1989
6.3 PAPER SEPARATION AND TRANSPORT
After image transfer the copy must be separated from the drum. To break the
attraction between the paper and the drum, the separation corona wire [D]
applies an ac corona to the reverse side of the paper. The stiffness and
weight of the paper causes it to separate from the drum [E].
The separation corona has a small dc bias but its effect is negligible. A dc
bias is unnecessary because the separation corona is wide and diffuse. The
negative charge on the paper (from the transfer corona) is not completely dis-
charged until the paper is far enough from the drum that the toner will not be
retracted to the drum. The two pick-off pawls [F] ensure that thin, low stiff-
ness paper and upward curled paper separate completely.
6.3.2 Paper Transport
The transport belts [G] are driven by the transport drive gear [H]. The gears
are engaged when the transport unit is set. The vacuum fan located in the
rear attracts the paper to the transport belt to ensure smooth paper transpor-
tation.
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