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    • 2. 发明授权
    • Electro-photographic apparatus having transfer bias control
    • 具有转印偏压控制的电子照相设备
    • US5761568A
    • 1998-06-02
    • US773837
    • 1996-12-27
    • Hideyuki HaragakiuchiHiroyuki TadokoroNobuaki FukasawaAkira SasakiIsamu TerashimaMasashi Yamamoto
    • Hideyuki HaragakiuchiHiroyuki TadokoroNobuaki FukasawaAkira SasakiIsamu TerashimaMasashi Yamamoto
    • G03G15/00G03G15/16G03G21/00
    • G03G15/1675G03G2215/00767
    • An electrophotographic imaging apparatus includes a toner image holding body, a transcription unit for transcribing the toner image on the toner image holding body onto a recording medium, and a conveyor for conveying a recording medium toward the toner image holding body and transcription unit. A judging device will judge whether printing is of a first page or not and if it is decided that printing is to be performed on a first page, a first measuring device will measure the electrical characteristic of the toner image holding body prior to the feeding of a recording medium and a transcription voltage will be set depending of this measured result. Thereafter, the recording medium will be conveyed toward the transcription unit where the electrical characteristics of the non-printing region on the recording medium will be measured via a second measuring device and the transcription voltage will be further adjusted. If it is judged that the recording sheet is not the first sheet, only the second measuring and adjusting will be performed. In this manner, transcribing of a toner image can always be performed regardless of the kind of paper being used and/or changes in the environment (temperature, humidity) and a high transcribing efficiency can be attained.
    • 电子照相成像设备包括调色剂图像保持体,用于将调色剂图像保持体上的调色剂图像转印到记录介质上的转印单元和用于向记录介质传送调色剂图像保持体和转录单元的传送器。 判断装置将判断打印是否是第一页,如果确定要在第一页上执行打印,则第一测量装置将在馈送之前测量调色剂图像保持体的电特性 将根据该测量结果设置记录介质和转录电压。 此后,记录介质将被传送到记录介质上的非打印区域的电特性将经由第二测量装置测量的转录单元,并且转录电压将被进一步调整。 如果判断记录纸不是第一张纸,则仅进行第二次测量和调整。 以这种方式,总是可以执行调色剂图像的转录,而不管使用的纸张的种类和/或环境变化(温度,湿度)和高转录效率如何。
    • 3. 发明授权
    • Color electrophotographic device with developer stirring
    • 带显影剂搅拌的彩色电子照相装置
    • US5530527A
    • 1996-06-25
    • US413225
    • 1995-03-30
    • Nobuaki FukasawaHiroyuki TadokoroAkira SasakiIsamu Terashima
    • Nobuaki FukasawaHiroyuki TadokoroAkira SasakiIsamu Terashima
    • G03G15/00G03G15/01G03G15/08G03G21/00H04N1/29
    • G03G15/0126G03G15/0849G03G15/0891
    • A color electrophtographic printer has: a photosensitive drum on which electrostatic latent images are formed according to print data separated by colors; a plurality of developing units each including a developing powder container accommodating a two component developing powder formed by mixing carriers and toners, an apparatus for agitating the developing powder, and a unit for supplying the toners in the developing powder container; a unit for selecting one of the plurality of developing units according to color to be developed and for activating the same to develope the corresponding electrostatic latent image formed on the photosensitive drum; and a control unit for controlling the respective operations. A control unit is further provided for counting colored print data dots contained in print data for respective colors and for additionally activating the developing powder agitating prior to a subsequent developing operation for any of the developing units which have experienced developing of the electrostatic latent images formed with colored print data dots in excess of a predetermined count.
    • 彩色电摄影打印机具有:根据由颜色分隔的打印数据形成静电潜像的感光鼓; 多个显影单元,每个显影单元包括容纳通过混合载体和调色剂形成的双组分显影粉末的显影剂粉末容器,用于搅拌显影粉末的装置和用于将调色剂供应到显影剂粉末容器中的单元; 用于根据要显影的颜色选择所述多个显影单元中的一个并用于启动所述显影单元以显影形成在所述感光鼓上的相应静电潜像的单元; 以及用于控制各个操作的控制单元。 还提供一个控制单元,用于计算包含在用于各种颜色的打印数据中的着色打印数据点,并且用于在随后的显影操作之前额外地激活显影粉末,用于任何已经经历了形成静电潜像显影的显影单元 彩色打印数据点超过预定计数。
    • 4. 发明授权
    • Color electrophotographic device with developer stirring
    • 带显影剂搅拌的彩色电子照相装置
    • US5434652A
    • 1995-07-18
    • US145602
    • 1993-11-04
    • Nobuaki FukasawaHiroyuki TadokoroAkira SasakiIsamu Terashima
    • Nobuaki FukasawaHiroyuki TadokoroAkira SasakiIsamu Terashima
    • G03G15/00G03G15/01G03G15/08G03G21/00H04N1/29
    • G03G15/0126G03G15/0849G03G15/0891
    • A color electrophtographic printer has a photosensitive drum on which electrostatic latent images are formed according to print data separated by colors; a plurality of developing units each including a developing powder container accommodating a two component developing powder formed by mixing carriers and toners, an apparatus for agitating the developing powder, and a unit for supplying the toners in the developing powder container; a unit for selecting one of the plurality of developing units according to color to be developed and for activating the same to develope the corresponding electrostatic latent image formed on the photosensitive drum; and a control unit for controlling the respective operations. A control unit is further provided for counting colored print data dots contained in print data for respective colors and for additionally activating the developing powder agitating prior to a subsequent developing operation for any of the developing units which have exprienced developing of the electrostatic latent images formed with colored print data dots in excess of a predetermined count.
    • 彩色电影打印机具有根据由颜色分隔的打印数据形成静电潜像的感光鼓; 多个显影单元,每个显影单元包括容纳通过混合载体和调色剂形成的双组分显影粉末的显影剂粉末容器,用于搅拌显影粉末的装置和用于将调色剂供应到显影剂粉末容器中的单元; 用于根据要显影的颜色选择所述多个显影单元中的一个并用于启动所述显影单元以显影形成在所述感光鼓上的相应静电潜像的单元; 以及用于控制各个操作的控制单元。 还提供控制单元,用于计数用于各种颜色的打印数据中包含的彩色打印数据点,并且用于另外激活在随后的显影操作之前搅拌的显影粉末,用于任何显影单元,其显影形成的静电潜像 彩色打印数据点超过预定计数。
    • 8. 发明授权
    • Color image control apparatus having photosensitive body and
intermediate transfer body
    • 具有感光体和中间转印体的彩色图像控制装置
    • US5648809A
    • 1997-07-15
    • US291543
    • 1994-08-16
    • Takeshi KatoHiroyuki TadokoroNobuaki Fukasawa
    • Takeshi KatoHiroyuki TadokoroNobuaki Fukasawa
    • B41J2/525B41J2/47G03G15/01G03G15/16H04N1/50B41J2/385
    • H04N1/508B41J2/473G03G15/0173G03G2215/0174
    • A color printer has means for setting toner image forming areas in the paper sheet convey direction in respect of respective colors, means for detecting a reference position on a photosensitive belt, and image formation start position setting means responsive to the reference position to set a toner image (electrostatic latent image) formation start position in the rotation direction of the photosensitive belt. When the paper sheet length is longer than the outer peripheral length of an intermediate transfer member, the image formation start position setting means sets, for colors other than the final color, a printing area which is shorter than the outer peripheral length of the intermediate transfer member and sets, for the final color, a printing area which begins immediately after a seam position of the photosensitive belt and conforms to the paper sheet length. Through the above setting, when toner images of two colors are superposed to print a color image, the printing area of the final color can be set to a desired range in the paper sheet length direction regardless of the outer peripheral length of the intermediate transfer member, thereby improving the printing speed and preventing degradation of quality.
    • 彩色打印机具有用于相对于各种颜色设置纸张传送方向上的调色剂图像形成区域的装置,用于检测感光带上的基准位置的装置,以及响应于基准位置的图像形成开始位置设置装置,以设置调色剂 图像(静电潜像)形成开始位置在感光带的旋转方向上。 当纸张长度大于中间转印部件的外周长度时,图像形成开始位置设定装置对于最终颜色以外的颜色设定比中间转印体的外周长度短的印刷区域 为最后的颜色设置打印区域,该打印区域在感光带的接缝位置之后立即开始并且符合纸张长度。 通过上述设置,当将两种颜色的调色剂图像重叠以打印彩色图像时,最终颜色的打印区域可以被设置在纸张长度方向上的期望范围,而不管中间转印部件的外周长度如何 从而提高打印速度并防止质量下降。
    • 9. 发明授权
    • Color electrophotographic device and method
    • 彩色电子照相装置及方法
    • US5373354A
    • 1994-12-13
    • US935404
    • 1992-08-26
    • Hiroyuki TadokoroIsamu TerashimaKazuhiro Wakamatsu
    • Hiroyuki TadokoroIsamu TerashimaKazuhiro Wakamatsu
    • G03G15/01G03G15/16G03G15/20G03G21/14G03G21/00
    • G03G15/0131G03G15/0152G03G15/0163G03G15/6591G03G15/0173G03G2215/00497
    • A color electrophotographic device includes, a color toner image producing device which produces a color toner image on a rotatable photo sensitive drum by forming four toner images thereon; an image transferring device which transfers the color toner image on the photo sensitive drum onto a recording medium; a fixing means which fixes the color toner image on the recording medium; a transferring device which transfers the recording medium; a recording medium selecting and feeding device which selects one of an ordinary paper and a transparent sheet to serve as the recording medium and feeds the selected one to the transferring device; and a control device which controls the operations of the devices referred to above and includes a first and a second control function which are rendered operative when the transparent sheet is selected as the recording medium, wherein the first control function causes the photo sensitive drum to perform one idle rotation before the image transferring device beings to transfer the color toner image carried on the photo sensitive drum onto the recording medium; and wherein the second control function causes the transferring device to reduce the transferring speed for the transparent sheet to a speed lower than that for the ordinary paper only during the operations of the image transferring device and the fixing means and the transferring speed reduction is accomplished after the last toner image has been formed on the photo sensitive drum and during the idle rotation thereof.
    • 彩色电子照相装置包括:彩色调色剂图像产生装置,通过在其上形成四个调色剂图像在可旋转的感光鼓上产生彩色调色剂图像; 图像转印装置,其将感光鼓上的彩色调色剂图像转印到记录介质上; 固定装置,其将彩色调色剂图像固定在记录介质上; 传送设备,传送记录介质; 选择普通纸和透明纸之一作为记录介质并将所选择的纸送到转印装置的记录介质选择和输送装置; 以及控制装置,其控制上述装置的操作,并且包括第一和第二控制功能,当选择透明片作为记录介质时,该第一和第二控制功能可操作,其中第一控制功能使感光鼓执行 图像传送装置之前的一个空转,将承载在感光鼓上的彩色调色剂图像转印到记录介质上; 并且其中所述第二控制功能使所述传送装置仅在所述图像传送装置和所述固定装置的操作期间将所述透明片材的传送速度降低到低于普通纸张的速度,并且所述传送装置在所述传送速度降低之后 最后一个墨粉图像已经形成在感光鼓上并且在其空转期间。