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公开(公告)号：US4661822A
公开(公告)日：1987-04-28
申请号：US838337
申请日：1986-03-10
CPC分类号： B41J2/175
摘要： An ink jet printer includes a pump which pressurizes an ink to be supplied to a nozzle, which projects an ink jet. When the ink pressure which is supplied to the nozzle exceeds a given value or when the deflection of the ink jet is improper, pressure oscillations are applied to the nozzle by alternately and repeatedly driving and ceasing to drive the pump in order to remove a plugging of the nozzle. If the repeated operation does not result in a reduced ink pressure, the nozzle is connected to a low pressure ink vessel, causing the pressure prevailing within the nozzle to be reduced.
摘要翻译： 一种喷墨打印机包括一个泵，该泵对要供应到喷嘴的油墨进行加压，该喷嘴突出喷墨。 当提供给喷嘴的油墨压力超过给定值时或当喷墨头的偏转不正确时，通过交替地和反复地驱动并停止驱动泵来对喷嘴施加压力振荡，以消除堵塞 喷嘴。 如果重复操作不会导致墨水压力降低，则喷嘴连接到低压墨水容器，导致喷嘴内的压力降低。
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公开(公告)号：US5266965A
公开(公告)日：1993-11-30
申请号：US863702
申请日：1992-04-03
CPC分类号： B41J2/0452 , B41J2/04541 , B41J2/04543 , B41J2/04581 , B41J2/04588 , B41J2002/14379
摘要： A method of driving an ink jet type printing head is applied to a printing head which has a plurality of channels, a plurality of nozzles provided on ends of the channels and a plurality of piezoelectric elements for varying volumes of the channels in response to driving voltages so as to eject ink from each nozzle having a corresponding channel the volume of which is reduced by a corresponding one of the piezoelectric elements. The method includes the steps of applying a first driving voltage to a first group of piezoelectric elements and a second driving voltage to a second group of piezoelectric elements, and controlling a phase of at least one of the first and second driving voltages so that a predetermined phase difference exists between the first driving voltage and the second driving voltage.
摘要翻译： 驱动喷墨式打印头的方法被应用于具有多个通道的打印头，设置在通道的端部上的多个喷嘴和用于响应于驱动电压而改变通道体积的多个压电元件 以便从具有相应通道的每个喷嘴喷射墨水，其体积被相应的一个压电元件减小。 该方法包括以下步骤：将第一驱动电压施加到第一组压电元件，将第二驱动电压施加到第二组压电元件，以及控制第一和第二驱动电压中的至少一个的相位，使得预定 在第一驱动电压和第二驱动电压之间存在相位差。
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公开(公告)号：US5270740A
公开(公告)日：1993-12-14
申请号：US843458
申请日：1992-02-28
申请人： Osamu Naruse , Hiromichi Komai , Toshio Inada , Toshitaka Hirata , Kenichi Ichikawa , Tomoaki Nakano , Minoru Ameyama , Masami Kadonaga , Syuzo Matsumoto , Kouji Izumi
发明人： Osamu Naruse , Hiromichi Komai , Toshio Inada , Toshitaka Hirata , Kenichi Ichikawa , Tomoaki Nakano , Minoru Ameyama , Masami Kadonaga , Syuzo Matsumoto , Kouji Izumi
CPC分类号： B41J2/0451 , B41J2/04541 , B41J2/04581 , B41J2002/14379
摘要： An ink jet head used for pulsed droplet ink jet printer uses a grooved piezo-electric element. The piezo-electric element includes a plurality of grooves, diaphrams and actuators. The actuator and two grooves at both sides of the actuator, filled with stuffing material, covers a corresponding one of passages. Therefore, even if the stuffing material moves when the actuator is energized, an interference problem does not occur. Consequently, the flexure force of each actuator can transmit to the corresponding passage to jet ink in the passage via a nozzle.
摘要翻译： 用于脉冲液滴喷墨打印机的喷墨头使用带槽的压电元件。 压电元件包括多个槽，膜和致动器。 致动器和致动器两侧的两个填充有填充材料的凹槽覆盖相应的一个通道。 因此，即使当致动器通电时填充材料移动，也不会发生干扰问题。 因此，每个致动器的挠曲力可以传递到相应的通道，以经由喷嘴喷射通道中的墨水。
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公开(公告)号：US4369471A
公开(公告)日：1983-01-18
申请号：US239500
申请日：1981-03-02
申请人： Toshitaka Hirata
发明人： Toshitaka Hirata
摘要： An image signal processing method in which an image light is projected on photoelectric conversion means and an image signal produced by said photoelectric conversion means is changed into an image signal in a binary form. The amplitude and level of an information signal to be binarily processed are kept nearly constant according to the invention and consequently the binary processing can be performed with a least leakage of informations.
摘要翻译： 一种图像信号处理方法，其中图像光投影在光电转换装置上，并且由所述光电转换装置产生的图像信号被改变为二进制形式的图像信号。 根据本发明，要二进制处理的信息信号的幅度和电平保持几乎恒定，因此可以以最少的信息泄漏来执行二进制处理。
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公开(公告)号：US5359350A
公开(公告)日：1994-10-25
申请号：US897383
申请日：1992-06-11
CPC分类号： B41J2/04541 , B41J2/04581 , B41J2/04588
摘要： An ink jet printing head driving method includes steps of: applying a voltage falling edge of a first pulse signal to cause a piezoelectric element to contract so that a capacity of a liquid passage is increased so as to supply ink to the liquid passage; applying a voltage rising edge of the first pulse signal to cause the piezoelectric element to expand so that the capacity of the liquid passage is decreased, for discharging an ink droplet through a discharge port, the first pulse signal having a first pulse width and a first peak voltage amplitude; and applying a voltage rising edge of a second pulse signal to the piezoelectric element after a predetermined delay time has elapsed since application of the first pulse signal for discharging the ink droplet, a pulse width of the second pulse signal being smaller than the first pulse width, and a peak voltage amplitude of the second pulse signal being equal to the first peak voltage amplitude.
摘要翻译： 一种喷墨打印头驱动方法，包括以下步骤：施加第一脉冲信号的电压下降沿以使压电元件收缩，从而增加液体通道的容量以便向液体通道供应墨水; 施加第一脉冲信号的电压上升沿使压电元件膨胀，使得液体通道的容量减小，以便通过排出口排出墨滴，第一脉冲信号具有第一脉冲宽度和第一脉冲宽度 峰值电压幅值; 并且在施加了用于排出墨滴的第一脉冲信号经过预定的延迟时间之后，将第二脉冲信号的电压上升沿施加到压电元件，第二脉冲信号的脉冲宽度小于第一脉冲宽度 并且第二脉冲信号的峰值电压幅度等于第一峰值电压幅度。
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公开(公告)号：US4437101A
公开(公告)日：1984-03-13
申请号：US374652
申请日：1982-05-03
申请人： Yutaka Ebi , Takao Fukazawa , Toshio Kawakubo , Koichiro Jinnai , Masanori Horike , Kyuhachiro Iwasaki , Chuji Ishikawa , Toshitaka Hirata
发明人： Yutaka Ebi , Takao Fukazawa , Toshio Kawakubo , Koichiro Jinnai , Masanori Horike , Kyuhachiro Iwasaki , Chuji Ishikawa , Toshitaka Hirata
CPC分类号： B41J2/13
摘要： In an ink jet printing apparatus wherein an ink ejection head is loaded on a carriage and, while the carriage moves relative to a sheet of paper, ink droplets are ejected from the head to be charged and deflected to impinge on the sheet of paper, a shape or a position of a conductive member carried on the carriage is varied to develop an electric field which is asymmetrical with respect to a predetermined plane in which charged ink droplets coming out from a charging electrode are to be deflected. The conductive member is constituted by a cover of the carriage, a shield plate, a gutter, a compensating electrode plate, a deflection electrode or the like.
摘要翻译： 在一种喷墨打印装置中，其中喷墨头装载在滑架上，并且当滑架相对于一张纸移动时，墨滴从头部喷出以被充电和偏转以撞击在纸上， 形状或承载在托架上的导电构件的位置是变化的，以产生相对于从充电电极出来的带电墨滴将被偏转的预定平面不对称的电场。 导电构件由托架，屏蔽板，沟槽，补偿电极板，偏转电极等的盖构成。
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