| 摘要 |
PURPOSE:To effectively prevent that the developing agent in the narrow space of the approach part between a recording medium and a recording electrode sheet may flow out in an image with direction to scatter, by forming step parts to the non-image forming parts, which correspond to both end parts of a recording electrode sheet in the lateral direction thereof, in the peripheral direction. CONSTITUTION:The developing agent 6 fed from the developing agent feed holes 2b of a recording electrode sheet 2 is dammed up by a weir member 11 so as not to excessively diffuse in an image width direction to be fed to a recording electrode part 2a. The developing agent 6 in the narrow space of the approach part between a recording medium and the recording electrode part 2a is not obstructed by the electrically connected earth electrode part 2c of the recoding electrode sheet 2 to move in the image width direction. At this time, the developing agent 6 is avoided from the narrow space of the approach part by the step parts (h) formed to the non- image forming parts of both end parts of the recording electrode sheet 2 in the peripheral direction while the developing agent 6 falling from the step parts (h) is collected by the rotary magnet member 4a in a developing sleeve 4 longer than the step part positions to be prevented from flowing out and scattering in the image width direction. |
