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    • 3. 发明授权
    • Image forming apparatus with plural types of image forming devices
    • 具有多种图像形成装置的图像形成装置
    • US5561500A
    • 1996-10-01
    • US566261
    • 1995-12-01
    • Yukihiro OhzekiKatsuhiro SakaizawaKenya Ogawa
    • Yukihiro OhzekiKatsuhiro SakaizawaKenya Ogawa
    • B41J2/01B41J2/21B41J2/525B41J3/54B41J13/00G03G15/00G03G15/01G03G15/22
    • B41J3/546G03G15/01G03G15/221
    • An image forming apparatus for forming an image on a recording medium includes a first transporting path for transporting the recording medium for forming an image on the recording medium by using a first image forming unit, a second transporting path for transporting the recording medium for forming an image on the recording medium by using a second image forming unit which forms the image by an image forming method which is different from a method employed by the first image forming unit, and a controller for controlling the apparatus in a black image selection mode, in which the first transporting path is selected in accordance with black image data for forming a black image on the recording medium, and the recording medium is transported through the selected first transporting path to form a black image on the recording medium, a color image selection mode, in which the second transporting path is selected in accordance with image data including color image data for forming a color image on the recording medium and the recording medium is transported through the selected second transporting path to form a color image on the recording medium, and a forcible selection mode in which the first transporting path is selected even if the image data includes color image data to transport the recording medium through the selected first transporting path to form a black image on the recording medium.
    • 用于在记录介质上形成图像的图像形成装置包括:第一传送路径,用于通过使用第一图像形成单元将用于形成图像的记录介质传送到记录介质上;第二传送路径,用于传送用于形成图像的记录介质 通过使用与第一图像形成单元所采用的方法不同的图像形成方法形成图像的第二图像形成单元和用于以黑色图像选择模式控制该装置的控制器,在记录介质上形成图像, 根据用于在记录介质上形成黑色图像的黑色图像数据选择第一传送路径,并且记录介质被传送通过所选择的第一传送路径以在记录介质上形成黑色图像,彩色图像选择模式 ,其中根据包括用于形成颜色的彩色图像数据的图像数据选择第二传送路径 记录介质上的图像和记录介质被传送通过所选择的第二传送路径以在记录介质上形成彩色图像,以及强制选择模式,其中选择第一传送路径,即使图像数据包括彩色图像数据 通过所选择的第一传送路径传送记录介质,以在记录介质上形成黑色图像。
    • 6. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US06185387B2
    • 2001-02-06
    • US09075210
    • 1998-05-11
    • Yukihiro OhzekiKatsuhiro Sakaizawa
    • Yukihiro OhzekiKatsuhiro Sakaizawa
    • G03G1500
    • G03G15/065G03G15/0216G03G15/1675G03G2215/00548G03G2221/0005
    • An image forming apparatus includes an image bearing member; a charging member for charging a surface of the image bearing member while contacting thereto with a predetermined voltage applied to the charging member; exposure member for exposing the surface of the image bearing member to form an electrostatic latent image; a toner carrying member contacted to the image bearing member with a predetermined voltage applied to the toner carrying member to visualize the electrostatic latent image into a toner image with toner carried thereon; an image transfer member for urging a transfer material to contact the transfer material to the image bearing member with a predetermined voltage applied to the image transfer member to transfer the toner image onto the transfer material; a device for applying the predetermined voltages to the charging member, the toner carrying member and the transfer member; and a controller for controlling the device that applies the predetermined voltage, the controller being operable in an operation mode for applying the predetermined voltage Vc to the charging member, the predetermined voltage Vdiv to the toner carrying member and the predetermined voltage Vtr to the transfer member, with the following satisfied: (1) Vc, Vdiv and Vtr have polarities the same as that of the toner: (2) |V1|>|Vdiv|, where V1 is a surface potential of the image bearing member charged by the charging means: and (3) |V1|>|V2|, where V2 is a surface potential of the image bearing member charged by voltage Vtr.
    • 图像形成装置包括:图像承载部件; 充电构件,用于在与所述充电构件施加的预定电压接触的同时对所述图像承载构件的表面充电; 曝光构件,用于暴露图像承载构件的表面以形成静电潜像; 调色剂承载构件以预定的电压与图像承载构件接触,以将调色剂图像形象化为调色剂图像,调色剂图像带有调色剂; 图像转印部件,用于以施加到图像转印部件的预定电压推压转印材料将转印材料接触到图像承载部件,以将调色剂图像转印到转印材料上; 用于将预定电压施加到充电构件,调色剂承载构件和转印构件的装置; 以及用于控制施加预定电压的装置的控制器,所述控制器可操作为将预定电压Vc施加到充电构件的操作模式,到调色剂承载构件的预定电压Vdiv和到转印构件的预定电压Vtr ,满足以下要求:(1)Vc,Vdiv和Vtr具有与调色剂相同的极性:(2)| V1 |> | Vdiv |,其中V1是通过充电充电的图像承载部件的表面电位 意味着:和(3)| V1 |> | V2 |,其中V2是由电压Vtr充电的图像承载部件的表面电位。
    • 9. 发明授权
    • Image forming apparatus including a developer bearing member having multiple layers
    • 图像形成装置包括具有多层的显影剂承载构件
    • US06397032B1
    • 2002-05-28
    • US09656838
    • 2000-09-07
    • Katsuhiro SakaizawaYukihiro OhzekiManami Sekiguchi
    • Katsuhiro SakaizawaYukihiro OhzekiManami Sekiguchi
    • G03G1508
    • G03G15/0818G03G2215/0861
    • In accordance with the present invention, an image forming apparatus includes an image bearing member for bearing an electrostatic latent image, a charging device for charging the surface of the image bearing member, an electrostatic latent image forming device for forming the electrostatic latent image on the surface of the image bearing member charged by the charging device, a developing device, which includes a developer bearing member for bearing a single component developer, for performing development by bringing the single component developer into contact with the electrostatic latent image to form a visible image, a transfer device for electrostatically transferring the visible image to a transfer member, and a fixing device for fixing the electrostatically transferred visible image on the transfer member. The developer bearing member includes at least a conductive core bar, an electron-conductive layer composed of an elastic body, and an ion-conductive layer.
    • 根据本发明,图像形成装置包括用于承载静电潜像的图像承载部件,用于对图像承载部件的表面充电的充电装置,用于在静电潜像上形成静电潜像的静电潜像形成装置 由充电装置充电的图像承载部件的表面,显影装置,其包括用于承载单一成分显影剂的显影剂承载部件,用于通过使单一成分显影剂与静电潜像接触而形成可见光图像来进行显影 ,用于将可见图像静电转印到转印部件的转印装置,以及用于将静电转印的可见图像固定在转印部件上的定影装置。 显影剂承载构件至少包括导电芯棒,由弹性体构成的电子传导层和离子传导层。
    • 10. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US5970279A
    • 1999-10-19
    • US89132
    • 1998-06-02
    • Katsuhiro SakaizawaYukihiro Ohzeki
    • Katsuhiro SakaizawaYukihiro Ohzeki
    • G03G15/02G03G21/00G03G15/00
    • G03G15/0266G03G21/0064G03G2215/021
    • An image forming apparatus wherein a developer remaining on a photosensitive member after an image transfer process is removed by developing means, the apparatus includes an electrophotographic photosensitive member; a contact charging means including an electrode contacted to the photosensitive member to electrically charge the photosensitive member, the contact charging means being supplied with a bias voltage form a charging bias voltage source; exposure means for exposing the photosensitive member to form an electrostatic latent image thereon after the photosensitive member is electrically charged by the charging means; developing means for supplying the developer from a developer carrying member to a latent image portion of the photosensitive member to develop the photosensitive member and simultaneously removing the developer remaining on the photosensitive member after the transfer process and conveyed to a downstream of the contact charging means on the photosensitive member, to the developer carrying member by a potential difference between the developer carrying member supplied with a developing bias and a latent image of the photosensitive member; and control means for controlling the charging bias and a developing bias, during a preparatory pre-rotation process of the photosensitive member for preparation for an image forming operation, to maintain a potential difference between the photosensitive member and the developer carrying member at a level lower than that during normal image forming operation, by surface potentials of the developer carrying member supplied with the developing bias and of the photosensitive member charged by the charging means.
    • 一种图像形成装置,其中通过显影装置除去在图像转印处理之后残留在感光构件上的显影剂,该装置包括电子照相感光构件; 接触充电装置,包括与感光构件接触以对该感光构件进行充电的电极,接触充电装置从充电偏压源提供偏置电压; 曝光装置,用于在感光构件被充电装置充电之后使感光构件暴露在其上以形成静电潜像; 用于将显影剂从显影剂承载构件供应到感光构件的潜像部分以显影感光构件并同时移除在转印处理之后残留在感光构件上的显影剂的显影装置,并将其传送到接触充电装置的下游 感光构件通过提供有显影偏压的显影剂承载构件与感光构件的潜像之间的电位差传递到显影剂承载构件; 以及控制装置,用于在用于制备图像形成操作的感光构件的预备预旋转过程期间控制充电偏压和显影偏压,以将感光构件和显影剂承载构件之间的电位差保持在较低水平 比正常成像操作期间提供显影偏压的显影剂承载构件的表面电位和由充电装置充电的感光构件的表面电位。