| 摘要 |
PROBLEM TO BE SOLVED: To adequately correct a timing of delivering an ink droplet with respect to positional deviation in conveying position of a printing medium when the printing medium is conveyed by means of a plurality of endless belts in a simple structure. SOLUTION: An outer peripheral length of each of first and second endless belts 6 and 7 forming first and second conveyor belts 4 and 5 is an integer multiple of an outer peripheral length of a drive roller 8. An ink droplet delivering timing correcting amountΔTn obtained based on a positional deviation in conveyance of a printing medium 1 on positions of first and second inkjet heads 2 and 3 at a time when the first and second conveyor belts 4 and 5 are rotated by one turn, is stored in a memory beforehand. The printing is carried out by delivering ink droplets on the recording medium 1 according to the ink droplet delivering timing correcting amountΔTn so that the ink droplet delivering timing can be adequately corrected with respect to the positional deviation in the conveyance of the recording medium 1 repeated by each one turn of the first and second conveyor belts 4 and 5 and the structure can be simplified because an additional sensor is unnecessary. COPYRIGHT: (C)2007,JPO&INPIT
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