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B. Printing Process
The major part of the image formation system is contained in the cartridge. as shown in Figure
2-17.
The cartridge used by the printer has a
seamless pholosensitive drum with the
structure shown in Figure 2- 18. The outer
layer of the drum consists of an organic
p h o t o c o n d u c t o r (OPC): the base is
aluminum.
The printing process can be divided into
five major stages:
Figure 2-18
Laser beam
Primary charging roll
Static charge eliminator
Figure
--
Photoconductive
layer
'_ Base
Electrostatic latent image
formation staqe
Figure
/',
C Cartridge
/"
Transfer charging roller
/
2- 17
Electrostatic latent image formation
stage
Step 1 Primary charge I-)
Step 2 Scanning exposure
Developing stage
Step 3 Development
Transfer stage
3.
Step 4 Transfer (+)
Step 5 Separation
Fixing stage
4
Step 6 Fixing
5
Drum cleaning stage
Step 7 Drum cleaning
2-19
CHAPTER 2
+ Paper path
- Drection of drum rotation
2 - 1 7
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