| 摘要 |
PCT No. PCT/JP96/01176 Sec. 371 Date Nov. 19, 1997 Sec. 102(e) Date Nov. 19, 1997 PCT Filed Apr. 4, 1997 PCT Pub. No. WO97/37854 PCT Pub. Date Oct. 16, 1997An ink jet printer and a head device of the ink jet printer wherein there are provided a plurality of printer heads each having N nozzles that are arrayed in the sub-scanning direction at an interval of K pixels for a pre-set resolution, where K/N is an irreducible fraction. The printer heads are each arranged so that the nozzles are disposed along the main scanning direction depending on the colors of the emitted ink. The printer heads are also arranged with a shift of L pixels relative to one another in the sub-scanning direction. During one scanning in the main scanning direction of the printer head, only one color ink is recorded (deposited) on the same line of a recordable member to prevent the second color ink from being recorded before drying of the first color ink to achieve printing of a picture of high picture quality. By arranging the printer heads with a step-like shift of L pixels so that L<N, the head device may be rendered smaller in size than the conventional head device. In particular, if a large number of nozzles are provided for high-speed printing, this effect becomes more outstanding.
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