Toshiba e-studio3511, e-studio4511 Manual page 73

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