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CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS
1-27
I OUTLINE
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.
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 [3] Residual toner
[2] Cleaning blade
[1] Drum [3] Residual charge
[2] Pre-charging exposure lamp (PCL)
8050ma1024
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8050ma1025
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