Technical information

Formation of Electrostatfc Latent Image Separation
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3. Image exposure
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1. Pre-conditioning exposure
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4. Development
8. Drum cleaning
5. Transfer corona exposure
Manual feed tray
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Delivery
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6. separaion
Registration
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7. Fixing
CFiSSt3te
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Flow of copy paper
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c Rotation of drum
Figure 2-2
The photosensitive drum is of a two-layer construc-
tion; its outer layer is made of organic photoconduc-
tor (OPC), and the inner layer is an aluminum base
made of conducting material.
Time (1) -
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Light area
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Photoconductlng Iayer
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Pre-conditioning Primary corona
Dark area
(step 1) (step 2)
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I Image exposure (step 3)
Figure 2-3
Figure 2-4
2. Formation of Electrostatrc Latent Image
This block consists of the first three steps of the
image formation process; at its end, the areas of the
drum corresponding to dark areas of the document
areleftwith negativecharges, andthoserepresenting
light areas are rid of negative charges.
3. Step 1 Pre-conditionrng exposure
The pattern of charges so formed is not visible to
the human eyeand, therefore, iscalled an electrostatic
latent image.
2-2
Figure 2-5
COPYAIGHT 0 1992 CANON ING. CANON NP2120/2MO RN.0 MAY 1990 PRINTEO IN JAPAN IIMPAIME AU JAPONI I