| 摘要 |
PURPOSE:To stably record a satisfactory image directly on paper by feeding a sole common electrode and a plurality of spiral signal electrodes inputting a print signal in parallel in a cross-opposed manner, feeding a toner conveyor to an electrode opposing part, and passing a recording material between the toner conveyor and the spiral signal electrode. CONSTITUTION:A bias power source 5d having the same polarity as that of toner storing charge is connected to a fixed electrode 5a, and auxiliary electrodes 5c, 5c are connected together to the + side terminal of a linear electrode application high voltage power source 4f. Accordingly, switches 4en are controlled to be opened or closed in response to a print signal to form an electric field in the opposing part (intersection point) between linear electrodes 4bn and the fixed electrode 5a, toner charged in - polarity on the surface of the toner conveyor 6 is transferred along the lines of electric force on paper P to be conveyed in a direction of an arrow (b) to print one dot. In this case, since a bias voltage having the same polarity as toner charging polarity is applied to the fixed electrode 5a, a strong electric field force is obtained, and the toner can be transferred rapidly and strongly on the paper P. |
