Ricoh PRIPORT VT 2000 Series Service Manual page 142

28 February '91
7.8 INK KNEADING MECHANISM
[A]
0.08 mm
[B]
[C]
[F]
[C]
[B]
[A]
[D]
[E]
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 rotates due to the gear [C], which rotates with the drum,
through idle gear [D] and gear [E] mounted on the ink roller. The ink roller
rotates 1.5 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 pressure roller located under the
drum.
Gear [E] has a one-way clutch to prevent the ink roller from rotating in the
reverse direction when the drum turns in the reverse direction during the
master eject process.
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