Bail Feed Mechanism - Oki PACEMARK 4410 Service Manual

2.2.6 Bail Feed Mechanism (See Figure )
This mechanism automatically opens the bail for pulling a paper into, and closes it after the paper
passes through the bail.
This function is operated by exclusive bail motor (pulse motor). The bail motor rotates depending
on the position of a paper, moving the bail lift lever (L) back and forth through gears.
The moving force of the bail lift lever (L) is also transmitted to the bail lift lever (R) through the
support shaft, so the right lever moves longitudinally in synchronization with the left lever. On the
bail lever, a cam plate is formed and interlocked to a pin of the bail Assy so that the bail Assy is
lifted and lowered by the longitudinal motion of the bail lever.
(1) Bail close position
This position is for the condition where a paper is being printed and carried with both bail Assy
and feed roller front upper closed.
(2) Bail open position
This position is for the condition where a paper is being pulled into the bail unit with the bail
Assy in open position and the feed roller front upper closed.
(3) Bail half open position
This position is for the condition where a paper is parked or jammed with both bail Assy and
feed roller front upper half-opened (to make removal of jammed paper easy).
The rotational force transmitted to the feed roller through mini-pitch belt following the LF gear
is, furthermore, transmitted to the bail roller, allowing both-side drive of paper at the bail unit.
Bail motor
Bail lift lever (L)
Gear
Pitch belt
Frame (L)
Support shaft
Feed roller
(front upper)
Feed roller
(front lower)
Figure 2.31
Bail roller
Drive shaft
Feed roller
(rear lower)
Frame (R)
Gear
Bail lift lever (R)
45