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DELIVERY
15 November 1995
7.2 EXIT PAWL DRIVE MECHANISM
[A]
[B] [C] [D] [H] [E] [G] [F]
C223D607.wmf
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 narrowest part of the pressure cam [G] comes to the bearing on the pressure on/off lever [H], 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 as it moves 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 widest part of the cam [G] comes to the bearing on the pressure on/off lever [H]), 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.
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