公开(公告)号：US4975718A

公开(公告)日：1990-12-04

申请号：US239741

申请日：1988-09-02

申请人： Kenji Akami ,  Gen Oda ,  Toshiyuki Iwasawa ,  Masayoshi Miura

发明人： Kenji Akami ,  Gen Oda ,  Toshiyuki Iwasawa ,  Masayoshi Miura

IPC分类号： B41J2/06

CPC分类号： B41J2/06 ,  B41J2002/061 ,  B41J2202/02

摘要： An ink nozzle plate has ink discharge channels for discharging ink, and an air nozzle plate has air discharge channels facing the ink discharge channels for discharging air to jet the ink. A power source produces an electric field through the ink at the ink discharge channels, thereby extending the ink meniscus, and the ink is jetted from the air discharge channels by air-flow and the electric field. A heating means increases the temperature of the air nozzle plate, thereby vaporizing water adsorbed in the air discharge channels and stabilizing the ink jet volume.

公开(公告)号：US4908635A

公开(公告)日：1990-03-13

申请号：US185020

申请日：1988-04-22

申请人： Toshiyuki Iwasawa ,  Masayoshi Miura

发明人： Toshiyuki Iwasawa ,  Masayoshi Miura

IPC分类号： B41J2/045 ,  B41J2/205 ,  B41J2/21

CPC分类号： B41J2/2128

摘要： A multi-nozzle type ink jet recording apparatus arranged so as to eject ink from each of a plurality of ink nozzles toward a writing surface by means of an electric field established due to an ink ejecting signal applied to each of the ink nozzles. The ink jet recording apparatus includes a circuit for generating a density information signal indicative of a recording density at every ink nozzle and a control unit being responsive to the density information signal and having a plurality of memories. Each of the plurality of memories stores a density-to-signal characteristic being predetermined to correspond to one or more of the ink nozzle and the density-signal characteristic represents the relation between the recording density and the ink ejecting signal indicative of an ink ejecting amount ejected from each of the ink nozzles. The control unit selects one from the density-to-signal characteristics at every ink nozzle and generating the ink ejecting signal indicative of the ink ejecting amount determined on the basis of the density information signal from the density information signal generating circuit in accordance with the selected density-to-signal characteristic, the generated ink ejecting signal being applied to the corresponding ink nozzle.

公开(公告)号：US4684957A

公开(公告)日：1987-08-04

申请号：US886245

申请日：1986-07-16

申请人： Masayoshi Miura ,  Toshiyuki Iwasawa

发明人： Masayoshi Miura ,  Toshiyuki Iwasawa

IPC分类号： B41J2/06 ,  B41J2/095 ,  G01D15/16

CPC分类号： B41J2/06 ,  B41J2/095 ,  B41J2002/061 ,  B41J2202/02

摘要： Disclosed is a method for operation of an ink jet printing head of the type wherein printing ink is discharged from a plurality of ink nozzles toward a writing surface by the aid of an electric field established between a plurality of control electrodes associated with the ink nozzles and a common electrode in opposed relation to the control electrodes. In response to a picture element signal for controlling the discharge of ink from the ink nozzles, a control pulse is generated and applied to each of the control electrodes, while a pulse bias is generated and provided to the common electrode. The pulse bias is supplied thereto only in the presence of the control pulse. The minimum width of the control pulse is established to be greater than 1/fp and smaller than 2/fp where fp is the frequency of the picture element signal.

摘要翻译： 公开了一种喷墨打印头的操作方法，其中打印油墨通过在与喷墨嘴相关联的多个控制电极之间建立的电场而从多个墨水喷嘴朝向书写表面排出， 与控制电极相对的公共电极。 响应于用于控制来自墨喷嘴的墨的排出的图像元素信号，产生控制脉冲并将其施加到每个控制电极，同时产生脉冲偏压并提供给公共电极。 仅在存在控制脉冲的情况下才向其提供脉冲偏压。 控制脉冲的最小宽度被建立为大于1 / fp且小于2 / fp，其中fp是像素信号的频率。

公开(公告)号：US4829325A

公开(公告)日：1989-05-09

申请号：US117852

申请日：1987-11-06

申请人： Toshiyuki Iwasawa ,  Masayoshi Miura

发明人： Toshiyuki Iwasawa ,  Masayoshi Miura

IPC分类号： B41J2/01 ,  B41J2/045 ,  B41J2/06

CPC分类号： B41J2/06 ,  B41J2002/061

摘要： An ink jet recording apparatus with an ink jet printing head is disclosed. The ink jet printing head has first and second electrodes for ejecting ink toward writing paper by means of an electric field established between the first and second electrodes, the first electrode being disposed in opposed relation to the writing paper. The writing paper is placed on a cylindrical drum which is provided so as to be in opposed relation to the ink jet printing head and moved with respect to the ink jet printing head. Also included in the ink jet recording apparatus is a third electrode which is provided on the outer surface of the cylindrical drum in opposed relation to the ink jet printing head. The third electrode is controlled so that the potential thereof is equal to or higher than that of the ink jet printing head.

摘要翻译： 公开了一种具有喷墨打印头的喷墨记录装置。 喷墨打印头具有用于通过在第一和第二电极之间建立的电场将墨水朝向书写纸喷射的第一和第二电极，第一电极被布置成与书写纸相对。 书写纸被放置在圆筒形的鼓上，其设置成与喷墨打印头相对并相对于喷墨打印头移动。 喷墨记录装置中还包括第三电极，其设置在与喷墨打印头相对的圆筒形鼓的外表面上。 控制第三电极使其电位等于或高于喷墨打印头的电位。

公开(公告)号：US4825102A

公开(公告)日：1989-04-25

申请号：US95457

申请日：1987-09-11

申请人： Toshiyuki Iwasawa ,  Masayoshi Miura

发明人： Toshiyuki Iwasawa ,  Masayoshi Miura

IPC分类号： H03K19/00 ,  H03K19/003 ,  H03K17/08 ,  H03K3/013 ,  H03K17/16 ,  H03K17/284

CPC分类号： H03K19/0013 ,  H03K19/00315

摘要： A drive circuit suitable for producing a high voltage drive output signal has an output stage formed of a P-channel MOS FET (4) and an N-channel MOS FET (5) connected for push-pull operation. The circuit is configured such that even with a supply voltage applied to the output stage which is higher than the ON-state withstand voltage of the MOS FETs, this value of voltage is prevented from being applied to a MOS FET which is in the ON stage, i.e. by providing voltage-dropping resistors (R.sub.1, R.sub.2) connected between the drain electrodes of the MOS FETs (4, 5) or utilizing a circuit which prevents each MOS FET from entering the ON state until after the other MOS FET has entered the OFF state.