| 摘要 |
PROBLEM TO BE SOLVED: To rapidly and accurately synchronize respective printing unit groups with each other with a low material cost and expenses. SOLUTION: A multiple-motor driver comprises at least one motor for each of printing unit groups A, B and C in order to synchronously drive the printing unit groups A, B and C to be driven via gear trains. The gear trains are mechanically separated during a printing operation. The motors 41, 42, 43 and 44 are respectively attached to divided positions 23 and 24 among the printing unit groups A, B and C. |
