| 摘要 |
PURPOSE:To ensure the good and stable transfer without causing any fog, by forming the electrostatic latent images of different polarities in accordance with two colors A and B of an original, developing these images with use of two different types of toners having different polarities, giving the simultaneous full- surface exposure with the AC corona discharge superpose with the DC component to the latent images to transfer them. CONSTITUTION:A substrate 1, a photosensitive layer 2 and an insulated layer 3 are successively laminated to constitute a photoreceptor. The negative charging is given onto the layer 3, and then an image exposure and the simultaneous adverse polraity charging are carried out via a red color cutting filter 5. In this case, the adverse polarity charged quality is equal to about 0V at the white foundation part W. When an image exposure is carried out via a red filter (b), and as a result the voltage is positive, negative and 0V at the black part B, the red part R and the white part W respectively. Then the development is carried out with a toner having the polarity opposite to the latent image. The AC corona discharge superposed with the DC component is carried out while the potential of the latent image of the black part is inverted to water. Then the transfer is performed after unifying the polarities. |
