Ricoh PRIPORT VT 2000 Series Service Manual page 98

28 February '91
3.3 MASTER FEEDING MECHANISM
[C]
[M] [I]
[J]
[A]
[N]
[Q]
[K]
[L]
[E]
[P]
[G]
[D]
[F]
[H]
[B]
[O]
The original transport motor starts rotating after the drum rotates 120 de-
grees past the 2nd drum position sensor. The reverse roller solenoid [A]
and the master feed motor [B] turn on after the original is fed 14 mm. The
rotation of the master feed motor is transmitted to the platen roller [C]
through the belt [D] and the pulley [E] which feeds the master and forces
the master to contact the thermal head [F]. Also, the rotation of the pulley
[E] is transmitted to the pulley [G] through the belt [H] to drive the upper
feed roller [I] and the lower feed roller [J] for master feeding.
The spring clutch [K] is located behind the reverse roller [L]. When the re-
verse roller solenoid turns on, the rotation of the upper feed roller is trans-
mitted to the reverse roller through the belt [M] as the stopper [N] releases
the spring clutch, thus feeding the master. Also, the master is directed down
to the clamper [O] of the drum. The counter rollers [P] prevent the master
leading edge from being wrapped around the reverse roller.
After the master is fed 61 millimeters, the master feed clamper solenoid
turns off because the master leading edge has already reached the clam-
per. At the same time, the reverse roller solenoid turns off and the reverse
roller stops.
A leaf spring on both holders [Q] prevents any master buckle due to free ro-
tation of the master roll.
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