43967002TH Rev.1
34 /
Oki Data CONFIDENTIAL
2. Theory of Operation
2.2 Print process
The paper that is fed from the tray 1 or tray 2 or tray 3 is transported by the feed paper roller, the
regist roller L and the transport roller. When paper is fed from MTP, paper is transported by the
MPT feed paper roller and the regist roller U. The paper that is transported on the belt passes
through the electro-photographic process of KYMC and the non-diffused toner image is created
on the paper. When paper passes through the fuser unit, the toner image is fused by heat and
pressure. After the toner image is fused, the paper is unloaded to the face-up stacker or the
face-down stacker depending on the unloading method selected by open/close of the face-up
stacker.
Operation during the one-sided print is described above. Operation during the both-sided print
is described below The paper that has passed through the fuser unit after the rear-side print
is completed first, is transported to the Duplex unit by the separator DUP. The paper that has
entered in to the paper inverting transport path is then transported to the inside of the Duplex
unit from the paper inverting transport path by the inverting movement of the inverting roller. The
paper that has passed through the Duplex unit by the transport roller of the transport path inside
the Duplex unit, is supplied from the feed paper path of the Duplex unit so that the paper enters
the same paper transport path as the feed paper route from the trays. The remaining operations
are the same as those of the one-sided print using the paper supplied from the trays.
Face-down stac
ker
Face up stac
ker
MPT
Paper inverting transport path
Sub roller
Feed roller
Sub roller
Transport roller
Feed roller
Regist roller L
Regist roller U
MPT feed paper roller
Transport roller
Transport roller
Inverting roller
Separator DUP
Heat roller
Backup roller
Halogen lamp
(1) Feed paper from the 1st tray
1. When the regist motor rotates (in counter-clockwise direction) while the
solenoid is activated to the ON state as shown in Fig. 2-1, the paper is
transported until the IN1 sensor is turned ON. (When the solenoid is turned
ON, the feed paper roller is driven.)
2. When the paper turns ON the IN1 sensor, the specified amount of paper is
transported so that the paper is pressed against the regist roller L. (Thus,
paper skew is corrected)
3. As shown in Fig. 2-2, the solenoid is turned OFF so that paper is transported
by the regist roller L. (When the solenoid is turned OFF, the regist roller L is
driven.)
Regist roller U
(drive)
Regist roller U
(drive)
Hopping roller
(drive)
Hopping roller
(stop)
Paper
Paper
Sub roller
(drive)
Sub roller
(stop)
Regist motor
(Rotates in counter-clockwise direction.)
Regist motor
(Rotates in counter-clockwise direction.)
Regist roller L
(stop)
Regist roller L
(drive)
WR sensor
WR sensor
Solenoid lever
(Solenoid ON)
Solenoid lever
(Solenoid OFF)
Hopping gear Assy
IN2 sensor
IN2 sensor
IN1 sensor
IN1 sensor
Fig. 2-1
Fig. 2-2
