- The transfer roller, which is made of conductive sponge, presses paper against the surface of the OPC drum and brings the paper into intimate
contact with the drum surface. The paper is placed on the drum surface, and positively (opposite to the charge of the toner) charged by the transfer roller on its
back.
Applying positive high voltage from the power supply to the transfer roller moves the positive charge induced by the transfer roller to the paper surface at the
contact portion between the transfer roller and the paper, the paper surface drawing the negatively charged toner from the drum surface.
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