| 摘要 |
PURPOSE:To make it possible to obtain a reversal recording image, in a direct toner adhering type image recording apparatus, by always applying bias voltage having the same magnitude as image signal voltage and polarity opposite thereto between a recording medium and a signal electrode in addition to said image signal voltage. CONSTITUTION:When SW is held to a C-side, a normal recording image is obtained. Now, when SW is changed over to a D-side, voltage of a bias power source 17 and the voltage of a signal power source 12 are applied between a rear electrode 4 and a signal electrode 5 and, when there is no image signal voltage, only the voltage of the bias power source 17 is applied between the signal electrode 5 and the rear electrode 4 and tower 8 is adhered to a recording medium 1 through the toner chain formed to the leading end of the signal electrode 5. On the other hand, when there is the image signal voltage, the bias voltage having the same magnitude as the image signal voltage and polarity opposite thereto is negated and no voltage is applied between the electrodes 4, 5 while no toner 8 is adhered to the recording medium 1. By this mechanism, a reversal recording image can be obtained by a simple means. |
