Toshiba E-STUDIO4508A - 3.4 COPY PROCESS; 3.4.1 General Description of Copying Process

3
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OUTLINE OF THE MACHINE
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3.4 COPY PROCESS
3.4.1 General Description of Copying Process
Fig. 3-11
(1) Charging: Applies negative charge on the
surface of the photoconductive drum.
(7) Transfer: Transfers the visible toner image
on the photoconductive drum onto paper.

(2) Original exposure: Converts images on the
original into optical signals.
(8) Separation: Separates paper with the toner
image from the photoconductive drum.

(3) Data reading: The optical signals are
converted into electrical signals.
(9) Fusing: Fuses the toner image onto the
paper by applying heat and pressure.

(4) Data writing: The electrical signals are
converted into light signal (laser emission)
which exposes the surface of the
photoconductive drum.
(10) Cleaning: Scrapes off the residual toner
from the drum.

(5) Development: Negatively-charged toner
adheres to the photoconductive drum and
forms visible image.
(11) Discharging: Eliminates the residual
negative charge from the surface of the
photoconductive drum.

(6) Transfer assist bias: Improves transfer
efficiency.

Original exposure
LED
Data reading(scanning)
CCD
Image processing
Discharging
Discharge LED (red)
(
11
)
(
8
)
(
7
)
(
6
)
(
10
)
(
2
)
(
3
)
(
1
)
(
4
)
(
5
)
Data writing
Semiconductive laser
Charging
Development
Magnetic roller
To n er
Carrier
Cleaning
Blade method
Bypass feeding
PFP
(
upper/lower
)
or LCF
Drawer feeding
(
upper/lower
)
Separation
Transfer assist bias
(
9
)
Paper exit
Fusing
Lamp heating method
Transfer