| 摘要 |
PURPOSE:To reduce a sweeping stroke of suction ports by a factor of the number of the suction ports to obtain a small maintenance device and smoothly conduct the parallel displacement of the suction ports by a method wherein the two suction ports are spaced from each other by a distance obtained by dividing a length of an orifice array by the number of the suction ports. CONSTITUTION:A vertical shaft 21 and the tip ends of suction ports 19 are disposed in proximity to each other with respect to the crosswise direction of a printer body. A distance (d) is approximately one-half of a length of an array of orifices 4. The two suction ports 19 are so disposed as to abut on an orifice plate 5 at the orifices 4. In this manner, by rotating a drive lever 11 in a direction of an arrow C, the two suction ports 19 sweep the orifices 4 from end to end. A bubble in a pressure chamber of a nozzle head is swept through each of the orifices 4. In this manner, the stroke of the drive lever 11 is slightly smaller than one-half of a width (b) of the orifice plate 5. |
