Toshiba 4511, 3511 manual White background Image is not Developed

(5) Development

Development is a process of making the electrostatic latent images visible to the eye (visible image).

Developer material is supplied to the photoconductive drum surface by means of a magnetic roller, allowing the toner in the developer material to adhere to the areas on the drum surface where the potential is lower than the developer bias which is applied to the magnetic roller (reverse development).

Drum

Magnetic roller

Fig. 3-306

3

	Magnet
Magnetic roller	Toner
	Carrier (always attracted
	onto the magnet)
	Toner
Bias voltage
-400V (-100 to -900V) DC
1.2kV/10kHz AC
	Toner
Photocon-
ductive drum	Photoconductive layer	White background	Halftone	Solid
	Aluminum base

Fig. 3-307

When the (–) potential of the photoconductive drum is higher than the developer bias.

When the (–) potential of the photoconductive drum is lower than the developer bias.

- 500V	White background
	Image is not
	developed
- 400V		Bias
		voltage
	Image is developed by
	toner
- 300V
- 200V
- 100V
0
	Fig. 3-308

November 2003 © TOSHIBA TEC

3 - 5 e-STUDIO3511/4511 COPY PROCESS

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