| 摘要 |
PURPOSE:To print plural colors at a high speed by executing an initial electrification, and thereafter, repeating an inversion development, and forming a toner image of plural colors on a recording body. CONSTITUTION:In order to execute printing by the second color, a photosensitive body 1 is exposed by the second exposing light source 18 for carrying the second information again after a development by the first color is completed, and also developed to the second color by the second developing device 19. In such a case, the second development is improved by applying a deviation voltage Vb2 from the second deviation voltage source 20. Two toner images formed in such a way are formed on the same photosensitive body, by each different color and at each different position, namely, without being superposed in its position. Also, the polarities of the first and the second toners are the same, and being different from a method for using a toner of a different polarity, the operation for making the polarities equal in case of a transfer is not required, and the toner image can be transferred as it is by a transfer use electrifying device. |
