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November 2003 © TOSHIBA TEC 3 - 5 e-STUDIO3511/4511 COPY PROCESS
3
Magnet
Magnetic roller
Toner
Carrier (always attracted
onto the magnet)
Toner
Photocon-
ductive drum
Photoconductive layer
Aluminum base
0
- 100V
- 200V
- 300V
- 500V
- 400V
(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
White background
Halftone
Solid
White background
Image is not
developed
Bias
voltage
Image is developed by
toner
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.
Toner
Magnetic roller
Bias voltage
-400V (-100 to -900V) DC
1.2kV/10kHz AC
Fig. 3-306
Fig. 3-307
Fig. 3-308
04/01