公开(公告)号：US4598301A

公开(公告)日：1986-07-01

申请号：US594682

申请日：1984-03-29

申请人： Masayuki Suzaki ,  Shoji Nishiwaki ,  Toshitaka Hayashima ,  Shigeyuki Araki ,  Masanori Momose

发明人： Masayuki Suzaki ,  Shoji Nishiwaki ,  Toshitaka Hayashima ,  Shigeyuki Araki ,  Masanori Momose

IPC分类号： B41J2/325 ,  B41J25/316 ,  B41J33/382 ,  B41J35/04 ,  B41J33/14

CPC分类号： B41J35/04 ,  B41J2/325 ,  B41J25/316 ,  B41J33/382

摘要： A thermal printer for printing characters or the like on a recording medium, heat-sensitive paper or plain paper, by a thermal printhead which is mounted on a carriage movable along the recording medium in a reciprocating manner is provided. The printhead is pressed against the recording medium while the carriage is moving in a printing direction and the printhead is kept away from the recording medium while the carriage is moving in a returning direction opposite to the printing direction. A cassette containing therein heat-sensitive ink ribbon is substantially elongated in shape and it bridges between a pair of side plates forming part of a frame of the printer when detachably mounted in position. The cassette is provided with a supply port at one end and a take-up port at the opposite end and thus the ribbon is lead outside through the supply port and lead inside through the take-up port. And the ribbon is taken up in association with the returning motion of the carriage.

摘要翻译： 提供一种用于通过热敏打印头在记录介质，热敏纸或普通纸上打印字符等的热敏打印机，该打印头安装在可沿着记录介质以往复方式移动的托架上。 当滑架沿着打印方向移动时，打印头被压靠在记录介质上，并且当滑架沿与打印方向相反的返回方向移动时，打印头远离记录介质。 其中容纳有热敏墨带的盒子的形状基本上是细长的，并且当可拆卸地安装在适当位置时，形成打印机的框架的一部分的一对侧板之间桥接。 磁带盒在一端设有一个供电端口，另一端设有一个卷取口，因此色带通过供电端口引导到外部，并通过卷取口引导到内部。 而色带与托架的返回动作相关联。

公开(公告)号：US4262592A

公开(公告)日：1981-04-21

申请号：US26240

申请日：1979-04-02

申请人： Shigeyuki Araki

发明人： Shigeyuki Araki

IPC分类号： B41J7/94 ,  B41J9/44 ,  B41J9/48 ,  H01F7/18 ,  B41J7/92

CPC分类号： B41J9/48

摘要： A coil (12), when electrically energized, magnetically drives a printing hammer to impact a type element against paper for printing a character. The coil (12) is connected to a power source (+V) for a predetermined time (T1) during which the hammer moves toward the paper and the current (I) through the coil (12) increases exponentially. Then, the coil (12) is energized for another predetermined time (T2) in response to logically high portions of a train of high frequency drive pulses (B). A diode (23) connected in parallel with the coil (12) maintains current flow through the coil (12) due to counter electromotive force during the logically low portions of the drive pulses (B) by providing a low resistance path across the coil (12).The average value of current through the coil (12) decreases exponentially during the time the drive pulses (B) are applied. The duty cycle of the drive pulses (B) is varied in accordance with the printing area of the character so that the rate at which the current (I) through the coil (12) decreases and thereby the force of impact of the type element against the paper vary accordingly. This enables all characters to printed with the same density regardless of the printing area thereof.

摘要翻译： 线圈（12）当被电通电时磁力驱动打印锤以将类型元件与纸张冲撞以打印字符。 线圈（12）连接到电源（+ V）一段预定时间（T1），在此期间锤子朝向纸张移动，并且通过线圈（12）的电流（I）呈指数增长。 然后，响应于高频驱动脉冲串（B）的逻辑高部分，线圈（12）被激励另外的预定时间（T2）。 与线圈（12）并联连接的二极管（23）通过在线圈（12）上提供低电阻路径，在驱动脉冲（B）的逻辑低部分期间由于反电动势而保持电流流过线圈（12） 12）。 在施加驱动脉冲（B）的时间内，通过线圈（12）的电流的平均值呈指数下降。 驱动脉冲（B）的占空比根据字符的打印区域而变化，使得通过线圈（12）的电流（I）减小的速率，从而使类型元件的冲击力反对 纸张也有所不同。 这使得能够以相同的密度打印所有字符，而不管其打印区域如何。

公开(公告)号：US4160200A

公开(公告)日：1979-07-03

申请号：US810208

申请日：1977-06-27

申请人： Tomoatsu Imamura ,  Shigeyuki Araki ,  Nobuo Iwata ,  Masahiro Yoshimi

发明人： Tomoatsu Imamura ,  Shigeyuki Araki ,  Nobuo Iwata ,  Masahiro Yoshimi

IPC分类号： G01D5/36 ,  G05B19/23 ,  G05B5/01

CPC分类号： G01D5/36 ,  G05B19/232 ,  G05B2219/37314 ,  G05B2219/42114

摘要： A monolithic photosensor array comprises first, second and third identical photodiodes. A light emitting diode illuminates the third photodiode continuously. An occluder disc is rotatably driven from the shaft of a servo motor between the light emitting diode and the first and second photodiodes. The disc is formed with a plurality of circumferentially spaced apertures which alternately cover and uncover the photodiodes which produce quasisinosoidal position signals in response thereto, the position signals of the first and second photodiodes being relatively 90.degree. out of phase. A computing circuit produces a motor shaft velocity command signal corresponding to the number of steps the shaft must rotate from the initial position to the new desired position and progressively reduces the magnitude of the velocity signal in response to the position signals. A differentiating circuit differentiates the position signals and their inversions and a commutator produces an actual velocity signal by sampling the peak values of the differentiated position signals. A comparator compares the velocity signal with the velocity command signal and produces an error signal corresponding to the difference therebetween which is fed to the motor as a drive signal. A sensor senses the output voltage of the third photodiode and an intensity control circuit adjusts the current flow through the light emitting diode until said output voltage has a predetermined value, thereby compensating for ambient temperature and other variations of all three photodiodes. A stable reference voltage for the apparatus is derived from the sensor.

公开(公告)号：US4039919A

公开(公告)日：1977-08-02

申请号：US583945

申请日：1975-06-04

申请人： Masayuki Suzaki ,  Shigeyuki Araki

发明人： Masayuki Suzaki ,  Shigeyuki Araki

IPC分类号： H02P8/00 ,  H02P8/24 ,  H02K37/00

CPC分类号： H02P8/24

摘要： A disc rotatable with the motor shaft has circumferentially equally spaced slots formed therethrough. A light source and receiver assembly are operatively arranged relative to the slots to produce pulses representing a predetermined angular displacement of the motor shaft determined by the width of the slots as the motor shaft rotates. The duration of the pulses decreases as the motor shaft speed increases. A multivibrator is triggered by the leading edges of the pulses to generate reference pulses of a predetermined duration. The motor phases are excited in a normal sequence as long as the duration of the pulses is longer than the duration of the reference pulses. When the pulse duration becomes less than the reference pulse duration, coincidence sensing means alter the phase excitation during the times between the termination of the pulses and the termination of the respective reference pulses to apply a torque to the motor shaft in such a manner as to prevent the motor shaft from accelerating further. The torque may be a low positive torque which is insufficient to overcome the frictional forces in the motor control system, a zero torque produced by de-energizing all of the motor phases or a reverse torque. The result is that the motor shaft speed is prevented from exceeding a predetermined value.

公开(公告)号：US4493570A

公开(公告)日：1985-01-15

申请号：US432622

申请日：1982-10-04

申请人： Shigeyuki Araki

发明人： Shigeyuki Araki

IPC分类号： B41J19/20 ,  B41J1/30

CPC分类号： B41J19/202

摘要： In an impact printing apparatus including a carriage which carries a rotary type element, the length of time required for a motor drive system for the carriage stop hunting and stabilize at a desired printing position depends on variables including the distance the carriage was moved, character pitch and the like. The apparatus senses these variables and delays hammering of the type element for printing for a length of time calculated to reduce the displacement of the carriage from the desired printing position caused by hunting to an acceptable value while maximizing the effective printing speed.

摘要翻译： 在包括承载旋转型元件的滑架的冲击式打印设备中，用于滑架停止的电动机驱动系统所需的时间长度在期望的打印位置处的稳定性取决于包括滑架移动距离，字符间距 等等。 该装置感测这些变量并且延迟用于打印的类型元件的锤击一段时间，其计算为在最大化有效打印速度的同时将托架从由期望的打印位置引起的位移减小到可接受的值。

公开(公告)号：US4661822A

公开(公告)日：1987-04-28

申请号：US838337

申请日：1986-03-10

申请人： Tetsuro Hirota ,  Shigeyuki Araki ,  Shizuo Yokoyama ,  Haruyoshi Masui ,  Toshitaka Hirata

发明人： Tetsuro Hirota ,  Shigeyuki Araki ,  Shizuo Yokoyama ,  Haruyoshi Masui ,  Toshitaka Hirata

IPC分类号： B41J2/01 ,  B41J2/175 ,  G01D15/18

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。

公开(公告)号：US4495455A

公开(公告)日：1985-01-22

申请号：US467981

申请日：1983-02-18

申请人： Shigeyuki Araki

发明人： Shigeyuki Araki

IPC分类号： H02P8/12 ,  H02P8/24 ,  H02K29/04

CPC分类号： H02P8/24

摘要： A control system for a stepping motor in which a current (or voltage) to be fed to each excitation coil of the motor at the timing for an m-phase excitation is different from a current (or voltage) to be fed at the timing for an n-phase excitation. This difference in current (or voltage) causes a same torque to develop both in the m-phase excitation and n-phase excitation.

摘要翻译： 一种用于步进电动机的控制系统，其中在m相激励的定时馈送到电动机的每个励磁线圈的电流（或电压）不同于在正时的馈电的电流（或电压） n相激励。 电流（或电压）的这种差异在m相励磁和n相励磁中产生相同的转矩。

公开(公告)号：US4339702A

公开(公告)日：1982-07-13

申请号：US185064

申请日：1980-09-08

申请人： Shigeyuki Araki ,  Hideyasu Yamanaka

发明人： Shigeyuki Araki ,  Hideyasu Yamanaka

IPC分类号： B41J9/44 ,  B41J33/24 ,  B41J33/34 ,  H02P8/08 ,  H02P8/24 ,  H02P8/28 ,  G05B19/40

CPC分类号： H02P8/08 ,  H02P8/24

摘要： A stepping motor (31) drives a load (33) such as an ink ribbon in a printer which exerts reverse torque on the motor shaft (32) thus displacing the shaft (32) slightly in the reverse direction when a low hold current is applied to a motor phase. Prior to switching the motor (31) to a next phase for rotation, a high drive current is applied to the present phase. After a certain length of time which is sufficient for the shaft (32) to be moved to the correct present position, the phases are sequentially switched while the high drive current is applied for rotating the shaft (32) and load to a new position.

摘要翻译： 步进马达31驱动打印机中的墨带等负载（33），该打印机在马达轴（32）上产生反向扭矩，从而在施加低保持电流时使轴（32）略微向相反方向移位 到电机阶段。 在将电动机（31）切换到下一个旋转相位之前，向当前相施加高的驱动电流。 在将轴（32）移动到正确的当前位置的足够长的时间之后，在施加高驱动电流以使轴（32）旋转并加载到新位置的同时依次切换相。

公开(公告)号：US5146240A

公开(公告)日：1992-09-08

申请号：US650952

申请日：1991-02-05

申请人： Takamasa Hayashi ,  Goro Mori ,  Shigeyuki Araki ,  Masahiro Yamamoto ,  Masaru Takahashi ,  Toshitaka Senma ,  Masami Miyajima ,  Takundo Isobe

发明人： Takamasa Hayashi ,  Goro Mori ,  Shigeyuki Araki ,  Masahiro Yamamoto ,  Masaru Takahashi ,  Toshitaka Senma ,  Masami Miyajima ,  Takundo Isobe

IPC分类号： G06K15/12

CPC分类号： G06K15/1214

摘要： An image forming apparatus which forms an image on a recording medium at a number of different dot densities. The image forming apparatus includes a light source part for emitting a light beam, a light detection part for detecting a light beam from the light detection part detecting a light beam from the light source part and for supplying a signal indicative of a power of the detected light beam when a monitored voltage obtained by the light beam is approximately equal to a reference voltage, a memory part for storing a number of power data corresponding to the number of different dot densities, an input part for inputting a first dot density selected, a power data control part for supplying a signal indicative of a changed power data which is changed from a value of said power of the detected light beam with a power data stored in the memory means which is located by the selected first dot density, and a driving part for operating the light source with the signal from the power data control part allowing the light source to emit a light beam with the changed power, the changed power being appropriate for forming an image on the recording medium at the selected first dot density.

摘要翻译： 一种图像形成装置，其以多个不同的点密度在记录介质上形成图像。 图像形成装置包括用于发射光束的光源部分，用于检测来自光检测部分的光束的光检测部分，其检测来自光源部分的光束，并提供指示检测到的光的功率的信号 当由光束获得的监测电压近似等于参考电压时的光束;存储对应于不同点密度数的多个功率数据的存储部分，用于输入所选择的第一点密度的输入部分， 功率数据控制部分，用于提供表示从所检测的光束的所述功率的值改变的改变的功率数据的信号，所述功率数据存储在存储在所选择的第一点密度的存储器装置中的功率数据，以及驱动 用于利用来自电力数据控制部分的信号来操作光源的部分，允许光源发射具有改变的功率的光束，改变的电力为ap 适于在所选择的第一点密度下在记录介质上形成图像。

公开(公告)号：US4611216A

公开(公告)日：1986-09-09

申请号：US700024

申请日：1985-02-08

申请人： Chuji Ishikawa ,  Shigeyuki Araki

发明人： Chuji Ishikawa ,  Shigeyuki Araki

IPC分类号： B41J2/125 ,  G01D15/18

CPC分类号： B41J2/125

摘要： A charge detecting electrode unit is disclosed which is coupled to a platen shaft of an ink jet printer so as to be rotatable relative thereto for detecting a deflected position of charged ink particles. It includes a housing having an internal space in which a charge detecting electrode is centrally located. The housing is formed with an opening which receives flying ink particles, in its front surface. An electrically conductive layer is formed on and continuously extends across the internal wall surfaces and the external surface of the housing around the opening, and an electrically conductive and water absorbing sheet is attached to the outer periphery of the housing and is in contact with the conductive layer located around the opening which is connected to a grounding wire. The housing also includes a compartment which houses a water absorbing pad and which is open to the exterior of the housing. The water absorbing sheet extends into the compartment, and the pad housed within the compartment is in contact with the sheet. The compartment is normally closed by a closure. An isolating plate is disposed in the opening to divide it into an upper and a lower area, thus preventing an ink which has found its way into the lower area from being dispersed into the upper area.

摘要翻译： 公开了一种电荷检测电极单元，其耦合到喷墨打印机的压板轴，以便可相对于其旋转，以检测带电墨颗粒的偏转位置。 它包括具有内部空间的壳体，电荷检测电极位于其中心。 壳体形成有在其前表面中接收飞溅墨颗粒的开口。 导电层形成在壳体周围的内壁表面和外表面上并且连续地延伸，并且导电和吸水片附接到壳体的外周并且与导电 位于开口周围的层，其连接到接地线。 壳体还包括容纳吸水垫并且对壳体外部敞开的隔间。 吸水片延伸到隔室中，容纳在隔室内的垫与片接触。 隔间通常由封闭封闭。 隔离板设置在开口中以将其分隔成上部和下部区域，从而防止已经进入下部区域的墨水分散进入上部区域。