| 摘要 |
PROBLEM TO BE SOLVED: To provide a printing head for a powder jet image forming device capable of obtaining high image density and printing at high speed. SOLUTION: The printing head includes the main part of each first electrode 21 comprising parallel electrodes 21a, 21b arranged at given distances, a groove 24 formed along the part between the parallel electrodes 21a, 21b of the first electrode 21 on the surface of an insulation layer 20 with each first electrode 21 formed therein, and a developer insertion hole 23 communicating from the surface of the second electrode 22 to the groove 24 of the insulation layer 20 at the groove 24 bottom wall of the insulation layer 20 and the second electrode 22. |
