41956001TH Rev.1 22 /Oki Data CONFIDENTIAL2.4.1 Electrophotographic process(1) Electrophotographic processThe following is the outline of electrophotographic process:1 ChargingDC voltage is applied to the charging roller and the surface of the OPC drum is negativelyand evenly charged.2 ExposureThe LED head, under image signals, emits light to the negatively charged surface of theOPC drum. The radiated portions of the drum surface attenuate in negative chargeaccording to the intensity of the light and, based on the surface potentials, a latentelectrostatic image is formed on the drum surface.3 DevelopmentNegatively charged toner contacts the OPC drum and, by electrostatic force, adheres tothe latent electrostatic image to form a clear image on the drum surface.4 TransferPaper is placed on the surface of the OPC drum, and positively, or opposite to the polarityof the toner, charged by the transfer roller on its back to transfer the toner image to thepaper.5 CleaningThe cleaning blade removes residual toner from the OPC drum after the transfer.6 FusingThe toner image on the paper is fused into place through the application of heat andpressure to it.
