| 摘要 |
PROBLEM TO BE SOLVED: To keep an image forming state well by accurately controlling through-holes for flying toner. SOLUTION: A plurality of rows of through-holes 22, wherein one row comprises four through-holes 22 arranged linearly in the direction inclined by a predetermined angle with respect to the feed direction of a recording medium, are formed to a flight control part 2 in the direction crossing the feed direction of the recording medium at a right angle. Ring-shaped control electrodes 23 are formed to the respective edge parts of the through-holes 22 and the control electrodes 22 of each row are connected by strip-like electrodes 24. Cylindrical toner carriers 45-48 are arranged under four through-holes 22 contained in one row. The toner carrier 45 supports the toner on its peripheral surface. A flight electric field is formed in the through-holes 22 corresponding to the positions where potential at the time of formation of the flight electric field is applied to both of a plurality of the strip-like electrodes and a plurality of the toner carriers 45-48 and toner flies from the surfaces of the toner carriers 45-48 through these through-holes 22. |
