hp Color 9850mfp IMAGE CREATION PROCESS 5 .8 Drum cleaning (Sub step 1) A drum that has completed the 1st transfer has a residual amout of toner that is left from the transfer pro- cess. The process to remove toner is referred to as drum cleaning. I OUTLINE 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. [3] [1] [2] [1] Drum [3] Residual toner [2] Cleaning blade 5 .9 Pre-charging exposure (Sub step 2) small amount of residual potential found.
Since a normal charging for the next copy/print cannot be carried No toner adhesion is found on the surface of a drum that has completed drum cleaning, but there is a very 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 engine conducts this process by using a pre-charging exposure lamp (PCL). [1] [3] [2] [1] Drum [3] Residual charge [2] Pre-charging exposure lamp (PCL) 1- 45