42615101TH Rev.8 30 /Oki Data CONFIDENTIAL2.2 Printing ProcessesPaper fed from a tray 1 or 2 is forwarded by Hopping roller, Registration Roller L and Feed roller.When feeding paper from a multiple tray, it is forwarded by a MPT Hopping roller and RegistrationRoller U. Then, the paper is moved onto a transfer belt and, through K, Y, M and C electrophotographicprocesses performed taking their turns, a yet-to-be-fused toner image is produced on the paper.While the paper passes through a fuser unit, heat and pressure fuses the toner to the paper. Afterthe fusing process, the paper is ejected to a face-up or face-down stacker, whichever is selectedaccording to whether the face-up stacker is opened.These operations are performed in single-side printing. Following are operations in two-side(duplex) printing.In duplex printing, paper passed through a fuser unit after it is first printed on the back is fed intoa duplex unit via a dup-in separator. Reversing roller’s reversing operation sends the paper via apaper reversing path into the duplex unit. After Feed rollers on a paper path in the duplex unit passthe paper through the unit, the paper is fed via a paper feeding path routed from the unit. Then,the paper is forwarded to the same route from the tray. After that, the same operation as thatperformed after the paper moving by the first registration roller L in single-side printing using trayfeeding is performed.MPTReversing RollerDup-In SeparatorFace-up StackerFace-down StackerHeat RollerHalogen LampBackup Roller Transfer BeltRegistration Roller URegistration Roller LMPT Hopping RollerFeed RollerSub RollerSub RollerHopping RollerHopping RollerFeed RollersPaper Reversing Path
