| 摘要 |
PURPOSE:To stabilize a high-resolution image on plain paper, to simplify structure and to improve durability by making the paper travel to an electrode opposing part where a control electrode is provided between a pair of electrodes and controlling the driving of the voltage impressed on the control electrode in accordance with recording information in a state where a bias pulse voltage is impressed on a pair of electrodes. CONSTITUTION:This bias pulse voltage having the same polarity as the electrostatically charged polarity of toner is impressed on a spiral electrode body 4. The control electrode 8 is disposed between a specified path where the toner is carried and the spiral electrode body 4 and the bias voltage having the opposite polarity to the electrostatically charged polarity of the toner is impressed on the electrode 8. a cylindrical electrode 6 is rotatably disposed on the toner carrying surface side of a toner carrying body 3 so as to be opposed to the spiral electrode body 4, and the pulse voltage having the reverse polarity to the electrostatically charged polarity of the toner is impressed on the electrode 6. Then, the bias voltage is made low in accordance with input recording information and the toner on the toner carrying body 3 is selectively transferred to the paper fed between the toner carrying body 3 and the electrode 6, so that a toner recorded image is formed. Thus, the durability is improved, the high-resolution image on the plain paper is stabilized and the structure is simplified. |
