(3) Actual process
Step 1 (charging)
The OPC drum is negatively charged by corona discharge of the
transfer charger . Positive charges are generated in the aluminum
layer.
Step 2 (Discharging)
When the OPC drum is exposed to the discharge lamp light, positive
and negative charges are generated in the OPC drum CGL. The
negative charges move to the positive charges generated in the
aluminum layer in step 1, and the positive charges move to the
negative charges on the OPC drum surface charged in step 1. The
positive charges and the negative charges are neutralized each other
in the aluminum layer and on the OPC drum surface. As a result, the
OPC drum surface potential becomes 20V
∼
30V.
By performing step 1 (Charging) and step 2 (Discharging), the
photoconductor itself is initialized to stabilize the drum surface poten-
tial.
Main corona unit
Blank lamp
Cleaning blade
Discharge lamp
Seperation pawl
Seperation corona unit Transfer corona unit
Resist roller
MG roller
Developer unit
CGL
CTL
OPC drum
Aluminum layer
High voltage unit
Transfer corona unit
CGL
CTL
Main corona unit
Blank lamp
Cleaning blade
Discharge lamp
Seperation corona unit
Transfer corona unit
Resist roller
MG roller
Developer unit
Seperation pawl
OPC drum
Discharge lamp
Light
Aluminum layer
5 – 7