Oki OKIOFFICE84 Maintenance Manual page 325

DESCRIPTION OF
PRINT OPERATIONS
(6) Transfer
The transfer roller is composed of conductive sponge material. This roller is set so that the
surface of the OPC drum and sheets of paper will adhere closely.
A sheet of paper is placed on the surface of the OPC drum and the positive charge opposite to
the negative charge of a toner is applied from the reverse side by the transfer roller.
When a high positive voltage is applied from the power supply to the transfer roller, the positive
charge induced on the surface of the transfer roller moves to the paper side at the contact part
between the transfer roller and the sheet of paper. The positive charge on the lower side of the
sheet of paper then causes the negatively charged toner adhering to the surface of the OPC
drum to move to the upper side of the sheet. This enables transfer to the sheet of paper.
OPC drum
Paper
High-voltage
Transfer roller
power supply
B - 11 40672201TH Rev. 4