Developing - OKIDATA OL600e Service Manual

Developing

Toner is attracted to the electrostatic latent image on the image drum surface, convert-
ing it into a visible toner image. Developing takes place through the contact between
the image drum and the developing roller.
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Operation Description
A. As the toner supply roller rotates while rubbing on the developing roller,
a friction charge is generated between the developing roller and the toner.
B. This allows the toner to be attracted to the developing roller.
The developing roller surface is charged positive.
The toner is charged negative.
Charge Roller
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.
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.
+ + + + + + +
– – – – – – –
+ + + + + + + + + + + + + + + + + + + + + + +
–750V
An illustration of activities at the contact point of the
image drum surface and the developing roller (arrow
marks denote the direction of the electric field).
Doctor Blade
Developing Roller
Image Drum
–300V
+ + + + + + + + + + + + + + + +
– – – – – – – – – – – – – – – –
–100V –750V –750V
Exposed Exposed
part part
–100V
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Service Manual, P/N 59271602
Toner Supply Roller
Developing roller
Toner
Image drum
OL600e/610e/610e-PS/610e-S