Ricoh C211 Service Manual page 490

7. Ink Kneading
[D]—
[A]
0.08mm
\ AW
I\
Ho'
[B]
'J, ~"
[F]
The ink kneading mechanism consists of the ink roller [A] which rotates with the drum
and the doctor roller [B] which ensures that the ink is supplied evenly to the ink roller.
The ink roller [A] rotates due to gear [E], which rotates with the drum, through idle gear
[C] and gear [D] mounted on the ink roller. The ink roller rotates 1.3 times faster than the
drum.
The doctor roller is adjusted to give a distance of 0.08 millimeters between itself and the
ink roller. It rotates to create an even thickness of ink.
The ink roller does not contact the screen [F] when not printing. However, during the
printing process, the ink on the ink roller is transmitted to the print paper through holes in
the screen and the master while the drum screen is held against the master by the pres-
sure roller located under the drum.
Gear [D] has a one-way clutch to prevent the ink roller from rotating in the reverse direc-
tion when the drum turns in the reverse direction during the master eject process.
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