| 摘要 |
PURPOSE:To ensure the removal of bubbles in an ink flow path to conduct a proper printing, to form a cap part with a very simple structure, and to improve a space efficiency by a method wherein ink and bubbles are pressurized by a pressurizing pump as well as sucked by a suction pump, and an ink suction port, an ink discharge port, and a pressure supply port are formed on a cap to be substantially flush with each other. CONSTITUTION:When bubbles or the like stagnate inside a head 1, a buffer tank 2, or the like, a motor 27 is driven with the head 1 capped with a cap 4 to actuate a pressurizing pump 28, and a motor 6 is driven to actuate a suction pump 7. In this manner, ink in the buffer tank 2 and an ink flow path of the head 1 is pressurized. On the other hand, by sucking a nozzle 1a of the head 1 from an ink suction port 22 by the suction pump 7, whereby the pressurized ink and bubble in the head 1 are sucked out of the nozzle 1a to be discharged to a waste liquid tank 8. In addition, the ink suction port 22, an ink discharge port 23, and a pressure supply port 24 are formed on the same surface of the cap 4. |
