Ricoh VT3500, Service Manual

Page: 115 / 330

7.2 EXIT PAWL DRIVE MECHANISM
The exit pawl [B] located in the center of the drum, guides the center of the
printing paper. As the master clamper [A] approaches the exit pawl, the exit
pawl moves away from the drum.
When printing pressure is applied to the drum, the bearing of the pressure
ON/OFF lever [H] comes to the bottom of the pressure cam [G] and the lever
[H] turns counterclockwise. The exit pawl drive cam [F] is connected to the
pressure ON/OFF lever [H] and so the cam [F] moves up. The exit pawl lever
[E] then turns clockwise along the surface of the exit pawl drive cam [F].
Therefore, the exit pawl also comes near the drum until the stopper [D]
contacts the adjusting screw [C]. This keeps a small clearance between the
exit pawl and the drum surface to ensure the printing paper will be fed to the
vacuum unit.
As the press roller moves away from the drum (the bearing of the pressure
ON/OFF lever [H] comes to the top of the cam [G]), the exit pawl drive cam
[F] moves down and the exit pawl lever [E] turns counterclockwise. This
causes the exit pawl [B] to separate from the drum.
The exit pawl [B] is held away from the drum when printing pressure is not
applied.
[A]
[B]
[C]
[D]
[E]
[H]
[G]
[F]
1 December 1993
2-79