Oki 6E, 6ex specifications 300V Developing roller

(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, negative).

Doctor blade

Charge roller

Toner supply roller

Developing roller

Image drum

2The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin coat of toner on the developing roller surface.

3Toner 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.

–300V

Developing roller

+ + + + + + + + + + + + + + + + + + + + + + +

– – – – – – – – – – – – – – – – – – – – – – – Toner

+ + + + + + + + + + + + + + + + + + + + + + +

–750V –100V –750V –750V

Image drum

Exposed Exposed

part part

–100V

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).

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