An illustration of activities at the contact point of the image drum surface and the developing roller (arrow marks denote the direction of the electrical field).

Note:

The bias voltage required during the developing process is supplied to the toner supply roller and the developing roller, as shown below. -500 VDC is

supplied to the toner supply roller, -265 VDC to the developing roller.

(5) Transfer

The transfer roller is composed of conductive sponge material, and is designed to get the image drum surface and the paper in a close contact.

Paper is placed over the image drum surface, and the positive charge, opposite in polarity to that of the toner, is applied to the paper from the reverse side.

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