DRUM
2-31
SM C231/C237/C238
Detailed
Section
Descriptions
2.5.4 INK ROLLER MECHANISM
The ink roller [A] and the doctor roller [B] are driven by the gear [C] on the drum
shaft. Ink on the ink roller is squeezed by the doctor roller to produce an even
thickness of ink across the ink roller surface. The ink roller drive gear [D] has a
one-way clutch to prevent the ink roller from being turned in the reverse direction
when the drum is manually turned in the reverse direction.
The ink roller does not touch the screen [E] when the machine is not printing.
However, during the printing process, the ink on the ink roller is applied to the
paper through the holes in the screens and the master. This happens when the
press roller [F] located underneath the drum moves upward to press the paper, the
drum screens and the master against the ink roller.
C231D541.WMF
[A]
[B]
[C]
[D]
[E]
[F]
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