Ricoh JP5000 Service Manual page 71

1 July, 1998 DRUM
Ink Kneading Mechanism
Rear [C]
[B]
[A]
Front
[D]
C229D007.WMF
[F]
C229D012.WMF
[E]
A gear [C] on the drum shaft drives the ink [A] and doctor [B] rollers. The doctor
roller spreads the ink evenly on the ink roller. The ink roller drive gear [D] has a
one-way clutch to prevent the ink roller from being manually turned in the reverse
direction.
The ink roller only touches the screen during the printing process. During the
printing process, ink passes to the paper through holes in the screens and the
master. This is because the pressure cylinder below the drum holds the drum
screen and the master against the ink roller during printing.
The ink roller blade [E] and separation plate [F] scrape off ink build-up on both
ends of the ink and doctor rollers.
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