| 摘要 |
PURPOSE:To improve an ink droplet injection frequency to a great extent by applying pressure through the reduction of a volume and decreasing pressure through the increase of a volume using two different ink chambers. CONSTITUTION:A voltage is applied to an electric machine conversion element 13a and the volume of an ink chamber 11a reduced. At that time, a voltage is applied to the electric machine conversion element 13b, resulting in the rapid shrinkage of the ink chamber 11a. This causes the pressure of the ink chamber 11b and subsequently ink droplets to be injected through a nozzle 12. After the elapse of a fixed time following the application of pressure, a negative pressure must be generated in the nozzle 12 by decreasing the pressure of the ink chamber. To perform this pressure reduction in the ink chamber 11a, the voltage of the electric machine conversion element 13a should be eliminated. Next, the pressure is applied by the ink chamber 11a and the pressure is reduced by the ink chamber 11b. |
