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ADU
*3 Second paper feed auxiliary mechanism*5 Reverse/exit paper path selection
The distance between the registration roller andThe reverse/exit selection gate in the fixing unit
the transfer and separation corona unit is madedetermines whether the paper is to be ejected
long to achieve the time required for correctingstraight or reversed and ejected. The paper gate
the image position. To assist conveyance ofis operated by the reverse gate SD (SD7)
paper between the registration roller and theinstalled in the ADU.
image transfer and separation corona unit, a pre-Because paper is reversed in the reverse/exit
transfer roller is provided just before the transfersection in the ADU, the reverse/exit section is
and separation corona unit.provided with a reverse/exit gate to switch
between the forward and backward paper con-
12veyance paths. This gate has no drive mecha-
nism and it is opened by the rigidity of the paper.
2 UNIT EXPLANATIONa. Reverse/exit operation
Normally, the reverse/exit selection gate opens
when the reverse gate SD (SD7) is turned OFF.
The paper fed by the exit roller in the fixing unit is
fed, through the path under the reverse/exit
543selection gate, to the reverse/exit section in the
ADU by the decurler roller. Normally, the
1. Leading edge PS (PS43) (rear)
reverse/exit gate in the reverse/exit section is
2. Paper mis-centering PS (PS70) (front)
closed. This gate is opened by the rigidity of the
3. Registration roller
fed paper, allowing the paper to be fed to the
4. Pre-transfer roller
reverse/exit roller, ADU gate, and ADU reverse
5. Transfer and separation corona unit
roller sequentially. Normally, the ADU gate is
closed and it has no drive mechanism; it is
*4 Conveyance section paper suction mecha-opened by the rigidity of paper.
nismWhen the paper reverse PS (PS42) detects the
A paper suction duct is provided in the middle oftrailing edge of paper and consequently turns
the conveyance section and is led to the convey-OFF, the reverse/exit roller and ADU reverse
ance suction fan (FM3) installed in the ADU. Toroller start rotating in the opposite direction, feed-
improve transportability of the paper that passesing the paper back toward the fixing unit. How-
through the conveyance section, the conveyanceever, since the reverse/exit gate is closed, the
suction fan is used to provide suction for thepaper is fed to the main body exit roller via the
paper.path outside this gate. Thus, the paper is ejected
with the print side down.
23
14
1. Conveyance section
2. Suction holes
3. Conveyance suction fan (FM3)
4. Duct
2-N-4 |
ACEC
MINOLTA
