(3)Development

Toner is attracted to a printed-image area on the exposure drum where surface potential is lowered due to exposure.

By controlling developing bias voltage supplied to the develop roller, the amount of toner taken to the drum is adjusted to keep printing density constant.

Charging

 

Laser beam

 

 

 

150 V

400 V to 300 V

 

(Changes depending on use condition)

 

 

 

 

850 V

Toner

Develop roller

Fig. Ref. 2-25

<Flow up of toner to the development process>

Toner adheres to the charged develop roller. Such adhered toner is adjusted to an even thickness, and is attracted to an exposed area on the exposure drum.

Blade

Exposure drum

Develop roller

Fig. 2-26

2-28

Confidential