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    • 3. 发明授权
    • Drive method for an electrostatic ink jet head for eliminating residual
charge in the diaphragm
    • 用于消除隔膜中残留电荷的静电喷墨头的驱动方法
    • US5818473A
    • 1998-10-06
    • US749874
    • 1996-11-14
    • Masahiro FujiiHiroyuki IshikawaShigeo NojimaHiroyuki MaruyamaAtsushi Yamaji
    • Masahiro FujiiHiroyuki IshikawaShigeo NojimaHiroyuki MaruyamaAtsushi Yamaji
    • B41J2/045B41J2/14B41J2/04B41J2/095
    • B41J2/04541B41J2/04551B41J2/04578B41J2/04588B41J2/14314
    • A drive method of an ink-jet head is provided in which a diaphragm is deformed by means of electrostatic force to eject an ink droplet from a nozzle so as to prevent a residual charge from being created between a diaphragm and an individual electrode. The method has first and second drive modes. In a first drive mode a voltage of a first polarity is applied between a diaphragm of the inkjet head (common electrode) and an individual electrode to cause the diaphragm to be deformed and an ink droplet to be ejected from a nozzle. In the second drive mode a voltage of a second polarity opposite to the first polarity is applied between the diaphragm and the individual electrode to cause the diaphragm to be deformed and an ink droplet to be ejected from the nozzle at least once for each operation of ink droplet ejection performed in the first drive mode. According to this method, a residual charge created between the diaphragm and the electrode can be removed concurrently with performing the operation of ink droplet ejection by applying positive and negative drive voltage pulses.
    • 提供了一种喷墨头的驱动方法,其中隔膜通过静电力而变形以从喷嘴喷射墨滴,从而防止在隔膜和单独电极之间产生残余电荷。 该方法具有第一和第二驱动模式。 在第一驱动模式中,在喷墨头(公共电极)的隔膜和单独电极之间施加第一极性的电压,以使隔膜变形并从喷嘴喷出墨滴。 在第二驱动模式中,在隔膜和单独电极之间施加与第一极性相反的第二极性的电压,以使得隔膜变形,并且对于每个墨的操作,墨滴从喷嘴喷射至少一次 在第一驱动模式中执行液滴喷射。 根据该方法,通过施加正驱动电压脉冲和负驱动电压脉冲来执行墨滴喷射的操作,可以同时去除在膜片和电极之间产生的残留电荷。
    • 4. 发明授权
    • Inkjet printer
    • 喷墨打印机
    • US06481833B1
    • 2002-11-19
    • US09635997
    • 2000-08-09
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • B41J2045
    • B41J2/04588B41J2/04525B41J2/04541B41J2/04578B41J2/04581B41J2/14314
    • Undesirable deflection of partitioning walls between ink pressure chambers is prevented during ink discharge operations even when the partitioning walls are made very thin to achieve a high density inkjet head. The diaphragms of the discharge nozzles of the inkjet head as well as the diaphragms of the non-discharge nozzles are all driven to contact the corresponding individual electrodes, and this diaphragm to individual electrode contact state is maintained in the non-discharge nozzles while the diaphragms of the discharge nozzles are released from individual electrodes to discharge ink. After printing is completed the diaphragms of the non-discharge nozzles are slowly released from the corresponding individual electrodes at a speed that will not cause undesirable ink discharge. By thus maintaining low compliance in the ink pressure chambers of the non-discharge nozzles, deformation of the partitioning walls between discharge and non-discharge nozzles due to change in the ink pressure can be reliably prevented. A drop in ink discharge performance due to such partitioning wall deformation can be reliably prevented, and printing with high resolution, precise print quality can be easily achieved.
    • 即使当分隔壁非常薄以达到高密度喷墨头时,在喷墨操作期间也防止了油墨压力室之间的分隔壁的不期望的偏转。 喷墨头的排出喷嘴的隔膜以及非排出喷嘴的隔膜都被驱动以接触相应的单个电极,并且该隔膜保持在非排放喷嘴中,而隔膜保持在单独的电极接触状态 的排出喷嘴从各个电极释放以排出墨。 在完成打印之后,不排出喷嘴的隔膜以不会导致不期望的墨水排放的速度从相应的单独电极缓慢释放。 通过这样维持在非排出喷嘴的墨压力室中的低柔顺性,可以可靠地防止由于墨压力的变化引起的排出喷嘴与非排放喷嘴之间的分隔壁的变形。 可以可靠地防止由于这种分隔壁变形引起的喷墨性能下降,并且可以容易地实现具有高分辨率,精确打印质量的打印。
    • 6. 发明授权
    • Ink jet head, ink jet printer, and its driving method
    • 喷墨头,喷墨打印机及其驱动方法
    • US06491378B2
    • 2002-12-10
    • US09754533
    • 2001-01-04
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • B41J206
    • B41J2/04541B41J2/04578B41J2/04588B41J2/04595B41J2/04596B41J2/14314
    • In an ink jet head that reduces failure or abnormality in ink ejection, electric charge/discharge is applied between opposed electrodes and diaphragms to eject ink droplets from ink nozzles. Each of the opposed electrodes includes a main electrode and a sub-electrode formed on the nozzle side and in common with sub-electrodes for the other diaphragms. Auxiliary electric charge is applied between the sub-electrode and the diaphragms so that the menisci or ink in the ink nozzles vibrate without ejecting unnecessary ink droplets and to shorten the time for tail portions of ejected ink columns to leave the ink nozzles. Ink in ink channels is diffused so that the ink viscosity does not increase due to evaporation of ink solvent. Also, the menisci in the nozzles are drawn into the ink chambers so that unnecessary ink droplets are not ejected immediately after printing ink droplets are ejected.
    • 在降低墨水喷射的故障或异常的喷墨头中,在相对的电极和隔膜之间施加电荷/放电以从墨水喷嘴喷射墨滴。 每个相对电极包括形成在喷嘴侧上的主电极和副电极,并且与用于其它隔膜的子电极共同。 辅助电荷施加在子电极和隔膜之间,使得墨水喷嘴中的半月板或墨水不会喷出不必要的墨滴并缩短喷射墨水柱尾部离开墨水喷嘴的时间。 油墨通道中的油墨扩散,使得由于油墨溶剂的蒸发而导致油墨粘度不增加。 此外,喷嘴中的半月板被吸入墨室中,使得在喷墨墨滴之后不再喷出不必要的墨滴。
    • 7. 发明授权
    • Ink-jet head and ink-jet printer
    • 喷墨头和喷墨打印机
    • US06419344B2
    • 2002-07-16
    • US09808165
    • 2001-03-13
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • Masahiro FujiiHiroyuki IshikawaYasushi Matsuno
    • B41J204
    • B41J2/14314B41J2002/14403B41J2002/14419B41J2202/21
    • An ink-jet head includes a plurality of ink ejection nozzles, a plurality of ink pressure chambers provided corresponding to the respective ink ejection nozzles and respectively communicated with the corresponding ink ejection nozzles, a common ink chamber for supplying an ink to the respective of the ink pressure chambers, a plurality of ink supply orifices provided corresponding to the respective ink pressure chambers and communicating the respective ink pressure chambers and the common ink chamber, and electrostatic actuators for varying volume of respective of the ink pressure chambers by an electrostatic force for ejection of ink droplets from the corresponding ink ejection nozzles. A plurality of the ink pressure chambers is arranged in a plane and the common ink chamber stacked on the plurality of ink pressure chambers for reducing the length.
    • 喷墨头包括多个喷墨喷嘴,多个墨水压力室,其相应于各个喷墨喷嘴设置并分别与相应的喷墨喷嘴连通,一个用于将油墨供应给相应墨水喷嘴的公共墨水室 墨水压力室,对应于各个墨水压力室设置的多个墨水供应孔,并且连通各个墨水压力室和公共墨水室;以及静电致动器,用于通过用于喷射的静电力使各个墨水压力室的体积变化 的墨滴从相应的喷墨喷嘴。 多个墨压力室布置在平面中,并且公共墨水室堆叠在多个墨水压力室上以减小长度。