Operating
2.1.1.5 Development
Development is the process of creating a toner image on the PC drum by applying toner to the
invisible static electric image.
doctor blade spreads a thin, even
of toner over the flexible
sleeve. When the toner passes between the doctor blade and the flexible sleeve, it becomes
negatively charged. The flexible sleeve transports toner to the surface of the PC drum and controls
the development with the developing bias voltage.
No positive toner is transported, and the
blade is charged to prevent the printing from
having a foggy background.
- Resin Sleeve
PC Drum
Toner Image
Figure 2-7. Development
2.1.1.6
Drum Cleaning
After the image is transferred onto paper, any re
toner on the PC drum is scraped off by
the cleaning blade and collected in the used toner bottle.
2.1.1.7 Image
Transfer
Image transfer is the process of transferring to the paper the toner image created on the PC drum
during development.
printer uses the roller image transfer method, instead of
corona image
transfer, as the image transfer process. In roller image transfer, there is no generation of ozone as
there is with corona discharge. Also, there is no blurring caused by motion in the image
because the image transfer
pressure bonds the paper
the PC
A reverse bias voltage is applied so that the positive toner is not
onto the image transfer
roller. (The drum charge bias voltage is used.)
Drum
PC
Drum
Image Transfer Roller
F
&
.
’
+
Sequential
Bias
R e v e r s e B i a s
–
Figure
2-8. Image Transfer
2-6
Rev.
