Canon NP-70 Service Manual page 25

NP•70
1-9
Process Function Remarks
4
Development
1.5 mm
Liquid
Dispersant
_
~'~~
Toner
f
Developer
Tray
The developer has a fluid carrier for
holding the toner powder in a colloi-
dal suspension. Due to friction, the
toner is charged negatively and the
carrier positively.
Negative charge
o ~
~x
~°~
ro o
~~
w 00
Due to the negative charge, extra
liquid on the drum surface is reduc-
ed for proper image transfer. At the
same time the toner image on the
drum will be stabilized.
kVDC
Toner
Applied voltage = —6.4
6
Transfer
~ ~
*Transfer corona:
Radiates positive ions against the
back side of the copying paper
and these ions attract the negative
toner particles onto the copying
paper.
Paper
1, ~.
Transfer
Corona
~]
Fixing
Heat Dispersion /
Plate
~\\,
~./ Heating
/ Element
Insulation
Plate
The dispersant on the paper is
evaporated by the heater.
© CANON INC.
Second Printing-June, 1974