Toshiba e-studio 167 - 3 Copy Process; General Description of Copying Process

3
© 2007 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO167/207/237
COPY PROCESS
3 - 1
3. COPY PROCESS
3.1 General Description of Copying Process
Fig. 3-1
(1) Charging: Applies negative charge on the
surface of the photoconductive drum.
(7) Separation: Separates paper with the toner
image from the photoconductive drum.

(2) Data reading: The images on the original
are converted into electrical signals.
(8) Fusing: Fuses the toner image onto the
paper by applying heat and pressure.

(3) Data writing: The electrical signals are con-
verted into light signal (laser emission)
which exposes the surface of the photo-
conductive drum.
(9) Cleaning: Scrapes off the residual toner
from the drum.

(4) Development: Negatively-charged toner
adheres to the photoconductive drum and
forms visible image.
(10) Discharging: Eliminates the residual nega-
tive charge from the surface of the photo-
conductive drum.

(5) Transfer bias: Improves transfer efficiency.

(6) Transfer: Transfers the visible toner image
on the photoconductive drum onto paper.

Data reading(scanning)
CIS
600 dpi,7084 pixel
Image processing
Discharging
Discharge LED (red)
Wavelength 660nm x10pcs
(
10
)
(
8
)
(
7
)
(
6
)
(
5
)
(
9
)
(
2
)
(
1
)
(
3
)
(
4
)
Data writing
Semiconductive laser
Pw=4.0 nJ/mm
2
Charging
e-STUDIO167/207:-448V
e-STUDIO237 :-454V
(grid voltage)
Development
Magnetic roller
Bias -340VDC+AC
Toner
Carrier
Cleaning
Blade method
Bypass feeding
(
100 sheets
)
Drawer feeding
(
250 sheets
)
PFU
(
250 sheets
)
Transfer
H 340 µADC
C 369 µADC
L 282 µADC
Separation
H -107 µADC
Paper exit
Fusing
Lamp heating method
564W x2
Transfer bias
DC +565V
L -70 µADC
C -107 µADC