| 摘要 |
PROBLEM TO BE SOLVED: To provide a printing head for a power jet image forming device capable of preventing the occurrence of white steps in a blackened printing part. SOLUTION: At the downstream side in the recording paper transportation direction of a first electrode 21-8 disposed at the most downstream side from the recording paper transportation direction or the upstream side in the recording paper transportation direction of a first electrode 21-1 disposed at the most upstream side from the recording paper transportation direction, an auxiliary electrode 21-9 is provided in parallel with the first electrode 21. Also, at each intersection position of the auxiliary electrode 21-8 and second electrode 22, and at each intermediate position between dots to be printed by the first electrode 21-8 at the most downstream side from the recording paper transportation direction and dots to be printed by the first electrode 21-1 at the most upstream side from the recording paper transportation direction, a developer insertion hole 24 is made for printing dots. |
