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CF5001 Ver.1.0 Sep. 2003
6.8
Drum cleaning (Sub step 1)
A drum that has completed the 1st transfer has a residual amount of toner that is left from the transfer pro-
cess. The process to remove toner is referred to as drum cleaning.
Drum cleaning is made by scraping toner adhered to the drum surface with the edge of a plate called a
blade that is made of urethane rubber.
[1]
Drum
[2]
Cleaning blade
6.9
Pre-charging exposure (Sub step 2)
No toner adhesion is found on the surface of a drum that has completed drum cleaning, but there is a very
small amount of residual potential found. Since a normal charging for the next copy/print cannot be carried
out as it is, exposure other than a laser exposure is made to thoroughly neutralize a potential on the drum
surface. This process is referred to as a pre-charging exposure.
This machine conducts this process by using a pre-charging exposure lamp (PCL).
[1]
Drum
[2]
Pre-charging exposure lamp (PCL)
[3]
[2]
[3]
1-27
IMAGE CREATION PROCESS
[1]
[3]
Residual toner
[1]
[2]
[3]
Residual charge
8050ma1024
8050ma1025
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