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2–4
COPYING PROCESS
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
F. Step 4 (development)
Figure 2-109
E. Step 3 (image exposure)
Figure 2-107
In this step, the optical image of an original is
projected on the photosensitive drum to neutralize
the charges in the
light
areas.
Figure 2-108
As shown in Figure 2-108, the developing as-
sembly consists of a fixed magnet, a cylinder that
rotates around the magnet, and a rubber blade.
The toner is a one-component toner whose
main ingredient is magnetic resins.
The toner has insulating characteristics and
becomes positively charged by friction against the
rubber blade, which remains in contact under pres-
sure with the cylinder; the toner is evened out to
form a thin layer on the cylinder owing to the
elasticity of the rubber.
Toner Blade
Cylinder
Magnet
Developing
cylinder
Blade
Magnet
Toner
Magnet
Optical image
Dark Light area