Printing Process - Oki MB461 Maintenance Manual

Oki Data CONFIDENTIAL

2.2 Printing process

The paper fed from Tray 1 and Tray 2 is conveyed by feeding roller, conveying roller, and resist
roller. When feeding paper is from MPT, it is conveyed by MPT, feeding roller, and resist roller.
After that the feeding paper that is conveyed by image drum and the nip part of transfer roller
forms toner image on the paper through electrophotographic process. And then, the toner
on the paper is fused by the heat and pressure as the fuser unit passing through. The paper
that fused the toner image is ejected from the face down stacker of the ejecting roller. To
eject printed pages on the face-up stacker, open the face-up stacker. (Duplex printing is not
available during face-up ejection.)
The above is about the operations at simplex printing, yet the below explains the operations
at duplex printing. While duplex printing, paper, which firstly passes the fuser unit after its
backside is printed, is conveyed to the inside of the duplex unit, by the reverse rotation of
the first and the second ejecting rollers in a certain period of time after the paper rear end
passes the fuser unit. The paper is conveyed by the conveying roller of the duplex unit and
then arrives the route for paper feeding from a tray. After that, the paper is handled in the
same way as paper fed from a tray for simplex printing.
44871001TH Rev.6
Face down stacker
Ejecting
2nd eject roller
sensor lever
Writing out sensor lever
Eject Assy opening
-closing sensor
Face up stacker
opening-closing sensor
1st eject roller Heat roller
Back
Transfer
roller
Face up stacker
Backup roller
Conveying roller
Paper conveying route
Driving roller (Continuous rotation)
Driving roller (Control rotation)
Driven roller
Paper level indicator lever
Indicating lever
2. DESCRIPTION OF OPERATION
Registration roller
Entrance
Stacker Cover
sensor lever
opening-closing sensor
Image drum MPT feed
B431 only
Multipurpose tray
Front
Paper end Sensor
Conveying roller
Feed roller
Pickup roller
Tray 1
Registration roller
Cassette presence
2nd Entrance sensor
- absence sensor
2nd Hopping
Pickup roller
Feed roller
Paper end / Cassette
presence - absence sensor
Tray 2 (option)
Photo sensor
Micro switch
Micro switch
Magnetic clutch
roller
sensor
2-6