| 摘要 |
PURPOSE:To obtain the titled device, which can prevent the mixing of bubbles in the bubbles in the ink jet head, by providing a bubble trapping device in an ink supplying path, which supplies ink to an ink jet head, and providing a bubble detecting device in the bubble trapping device. CONSTITUTION:In the bubble trapping device 1, an electric distortion vibrator 6, a bubble discharging port 7, and a discharge port cap 8 are provided. The electric distortion vibrator 6 is driven by the bubble detecting circuit 10 in a pulse mode. The vibrating voltage is detected by the bubble detecting circuit 10 as to whether the bubbles remain, in the bubble trapping device 1 or not. When the bubbles remain the discharge port cap 8 is removed, and the remaining bubbles are discharged to the outside. |
