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CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS
1-23
I OUTLINE
6.2 Charging process (Step 1)
The charging corona, having a gold-plated tungsten wire, is applied with a high DC voltage (minus) to neg-
atively charge the surface of the photosensitive drum by wire discharge. The charging corona is provided
with a charging control plate to make charges on the surface of the photosensitive drum uniform. Photo-
sensitive drums are provided for the four colors of Y, M, C and K.
6.3 Laser exposure process (Step 2)
Charges on the surface of the photosensitive drum have a characteristic that when they are irradiated with
light, they are neutralized and vanish. Using this characteristic, a laser beam is irradiated on the image
region to create an image by removing charges on the photosensitive drum. This image is referred to as an
electrostatic latent image. A Laser beam is irradiated on each photosensitive drum of Y, M, C and K corre-
sponding to the four color data resolved by the image processing section.
[1] Drum [3] Charging corona
[2] Charge (negative) [4] Charging control plate
[1] Write unit [3] Neutralized section
[2] Laser beam [4] Charge (negative)
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