| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that bubbles are apt to remain. SOLUTION: A valve 14 for discharging bubbles is set to an ink buffer part 7, which opens when a pressure in an ink supply path is larger than an atmospheric pressure and shuts when the pressure is smaller than the atmospheric pressure. Moreover, a pressuring mechanism 16 is set which can increase the pressure in the ink supply path. |
