| 摘要 |
PURPOSE:To facilitate transfer to ordinary paper, to enable color recording, to keep a recording medium and a toner in a noncontact state, and to prolong the life of the medium by using an insulating magnetic toner in place of an electrically conductive magnetic toner. CONSTITUTION:A developing device is composed of a magnet 6' and a hollow cylindrical member 5' for transferring a toner, and an insulating magnetic toner 13 is used. A recording medium 11 composed of a transparent electrode substrate 1 and a photoconductor 2 is set at the recording position 12. At a part C irradiated with light 9, negative charges from a power source 10' enter the layer 2 and reach a part close to the position 12, so the insulating magnetic toner 13 with positive charges are attracted. At this time, AC voltage is impressed between the medium 11 and the member 5' from the source 10', yet the toner 13 overcomes the negativity of the member 5' and sticks to the medium 11 to carry out development. |
