| 摘要 |
PROBLEM TO BE SOLVED: To speed up printing speed, and lower printing speed by allowing a plurality of print heads radially arranged relative to a central axis defined between the print heads to print on a disc disposed for printing to the disc. SOLUTION: An ink jet printer 10 operates to print marks 20 on a substantially circular disk 30 having a wheel-like printing area 33. The printer 10 comprises a plurality of long and slender ink jet printers 40a, 40b, 40c, 40d; which are radially formed and set relative to a central axis defined by each printing head. In addition, each print head 40a-40d has end parts 50a, 50b, 50c, 50d joined respectively to a hub 60 having a center in the central axis. A motor 120 and both of each print head are connected by a controller 130, herein, the controller 130 works to control the operation of the motor 120 and print head 40a, 40b, 40c, 40d. |
