| 摘要 |
PURPOSE:To improve picture quality and to increase speed by setting the extent of subscanning-directional movement to the integer multiple of the extent of movement a half as large as the intervals of nozzle holes perpendicular to a main scanning direction. CONSTITUTION:Plural (N) nozzle holes (ink jet hole) 2 are arranged at intervals P on the jet surface 1A of a multihead nozzle 1 so as to obtain dot intervals of the multihead nozzle 1 for obtaining the dot interval of 16dots/mm. The intervals P of the nozzle holes 2 are set to a value a half as large as desired dot density, i.e. 8nozzles/mm. The nozzle head 1 is driven while making a main scan as shown by an arrow 3 and then the head 1 makes a fine subscan by a half as large as the nozzle hole pitch P as shown by an arrow 5. |
