Paper Switchback Mechanism - Konica Minolta bizhub C250 Service Manual

5. Mechanical operations
5.1.2

Paper switchback mechanism

• When the last paper of the first print set is transported onto the Finisher Tray during a
multi-print cycle in the Sort Staple mode, the first paper of the subsequent print set,
which is to be next transported, undergoes a switchback sequence. The paper for the
switchback is transported via the lower paper path.
• The second paper of the second print set is placed over the paper which has undergone
the switchback sequence. After the first print set has been fed into the Elevator Tray, the
first and second sheets of paper of the second print set are together transported onto the
Finisher Tray.
• The switchback sequence of the paper is performed by turning the motor backward,
which turns the Lower Path Transport Roller and Storage Roller backward.
• The sheet of paper to be transported next to the one subjected to the switchback
sequence is transported via the upper paper path.
• No switchback sequence is carried out if the interval between sheets of paper is wide as
when using paper of a large size.
<Three A4 originals for two print sets>
The sheets of paper for the first print are
transported via the upper paper path onto
the Finisher Tray.
The first sheet of paper of the second print
set is transported via the lower paper path.
The first sheet of paper of the second print
set undergoes the switchback sequence and
stops. The second sheet of paper stops as
soon as its trailing edge leaves the Entrance
Roller.
12
Theory of Operation Ver. 1.0 Jul. 2005
➀ ➁ ➂
, , : Sheets of paper for the first print set
➀ ➁ ➂
', ', ': Sheets of paper for the second print set
The first and second sheets of paper of the
second print set are transported together,
one on top of the other.
The Exit Rolls are pressed against the Exit
Roller to feed the sheets of paper of the first
print set out. At the same time, the first and
second sheets of paper of the second print
set are transported toward the exit.
When the first print set is fed out, the Exit
Roller starts turning backward to transport
the first and second sheets of paper of the
second print set to the Finisher Tray. The Exit
Rolls leave the Exit Roller.