%Developing(4) Developing
Toner is attracted to the electrostatic latent image on the image drum surface, converting it into a visible
toner image. Developing takes place through the contact between the image drum and the developing
roller.
1 As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated
between the developing roller and the toner, allowing the toner to be attracted to the developing roller (the
developing roller surface is charged positive and the toner is charged negative).
2 The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin coat of
toner on the developing roller surface.
3 Toner is attracted to the exposed portion (low-potential part) of the image drum at the contact of the
image drum and the developing roller, making the electrostatic latent image visible.
Note:
The bias voltage required during the developing process is supplied to the toner supply roller and
the developing roller, as shown in the diagram below. 450 VDC is supplied to the toner supply roller, 300
VDC to the developing roller.
OKI OL600/610ex (96-01-18