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    • 91. 发明公开
    • Image forming device
    • Abbildungsvorrichtung
    • EP0708383A2
    • 1996-04-24
    • EP95116641.2
    • 1995-10-23
    • Ricoh Company, Ltd
    • Maruta, TakayukiTakashima, HiroshiIshikawa, TomojiSugihara, KazuyukiKato, ShinjiKosuge, Katsuhiro
    • G03G15/06G03G15/01
    • G03G15/0121G03G15/065G03G2215/0177
    • An image forming device includes a plurality of developing devices and a photosensitive drum. Each of the developing devices includes a developer carrying roller. Preselected one of the developing devices is moved to a developing position confronting the photosensitive drum which is formed with a latent image. A first developing bias including a d.c. component and an a.c. component is applied to the developer carrying roller and developer on the developer carrying roller is rendered in contact with the latent image on the photosensitive drum so that the latent image is developed. On the other hand, when the developer on the developer carrying roller comes in contact with and separates from the photosensitive drum due to the movement of the developing device, a second developing bias is applied to the developer carrying roller. The second developing bias generates an electric field where the developer on the developer carrying roller is more reluctant to move toward the photosensitive drum as compared with the first developing bias. The second developing bias may include only a d.c. component.
    • 图像形成装置包括多个显影装置和感光鼓。 每个显影装置包括显影剂承载辊。 预选的一个显影装置被移动到面对形成有潜像的感光鼓的显影位置。 首先发展中的偏见包括直流 组件和a.c. 将显影剂承载辊施加到显影剂承载辊上并使显影剂承载辊上的显影剂与感光鼓上的潜像接触,使潜像显影。 另一方面,当显影剂承载辊上的显影剂由于显影装置的移动而与感光鼓接触并与感光鼓分离时,向显影剂承载辊施加第二显影偏压。 第二显影偏压产生电场,其中与第一显影偏压相比,显影剂承载辊上的显影剂更不愿意朝向感光鼓移动。 第二个发展中的偏差可能只包括直流 零件。
    • 94. 发明公开
    • Dynamic developer bias control for use in an electrostatic printing machine
    • Vorrichtung zur dynamischen Regulierung des Entwicklungspotentials in einem elektrostatischenDruckgerät。
    • EP0650101A1
    • 1995-04-26
    • EP94116636.5
    • 1994-10-21
    • XEROX CORPORATION
    • Hart, Lawrence M.Xu, Hong FengDing, Ya-Jun
    • G03G15/06
    • G03G15/065
    • An apparatus for providing a novel dynamic developer bias control system adapted to determine an optimal developer bias during the processing of the lead edge of an input document. Loss of image density for images on the lead edge of a document is minimized by varying the developer bias relative to variations in an optical sensor voltage signal. In addition, background development in the body of the copy sheet is further prevented by maintaining a developer bias at an elevated level in response to a determination that the lamp voltage exceeds a maximum level and the optical sensor signal is less than a predetermined target value.
    • 该插图包括用于将原始输入文档的光图像发送到成像元件上以在其上产生潜像的成像系统。 该成像系统包括光学传感器,用于感测与原始输入文档的非图像区域相对应的原始输入文档的前缘区域中的透射光的光强度。 显影系统包括用于在成像元件上显影潜像的显影剂电极。 包括用于向显影剂电极施加电偏压以在成像构件和显影剂电极之间产生电场的装置。
    • 96. 发明公开
    • Developing device and method
    • Entwicklungsgerätund -verfahren。
    • EP0577077A2
    • 1994-01-05
    • EP93110368.3
    • 1993-06-29
    • SHARP KABUSHIKI KAISHA
    • Toyoshima, TetsuroUeda, TetsuyukiInoue, AtsushiKamimura, TaisukeFujita, HideakiYamanaka, Takayuki
    • G03G15/08
    • G03G15/0812G03G15/065G03G15/0808G03G2215/0619
    • A developing device for developing, by using a developer, a latent image formed on a surface of an image data forming member (7) including a developer accommodating section (14) for accommodating the developer (13); a first developer retaining member (1) for receiving the developer from the developer accommodating section (14) and transporting the developer; a second developer retaining member (2) for receiving the developer from the first developer retaining member (1) and making the developer adhere to the latent image formed on the image data forming member (7); a conductive member (3) opposed to the second developer retaining member (2) with an appropriate space (4) interposed therebetween; a first voltage applying member (11) for applying a voltage between the first developer retaining member (1) and the second developer retaining member (2); a second voltage applying member (9) for applying a voltage between the second developer retaining member (2) and the surface of the image data forming member (7); and a third voltage applying member (10) for applying a voltage between the second developer retaining member (2) and the conductive member (3) in order to form an electric field in the space (4) therebetween.
    • 一种用于通过使用显影剂显影形成在包括用于容纳显影剂的显影剂容纳部分的图像数据形成部件的表面上的潜像的显影装置; 第一显影剂保持构件,用于从显影剂容纳部分接收显影剂并运送显影剂; 第二显影剂保持构件,用于从第一显影剂保持构件接收显影剂,并使显影剂附着到形成在图像数据形成构件上的潜像; 与第二显影剂保持构件相对的导电构件,其间具有适当的空间; 用于在第一显影剂保持构件和第二显影剂保持构件之间施加电压的第一电压施加构件; 第二电压施加构件,用于在第二显影剂保持构件和图像数据形成构件的表面之间施加电压; 以及第三电压施加构件,用于在第二显影剂保持构件和导电构件之间施加电压,以便在它们之间的空间中形成电场。
    • 98. 发明公开
    • Image forming apparatus having image transfer electrode contactable to transfer material
    • Bildzeugungsgerätmit einer dasÜbertragungsmaterialberührendenBildübertragungselektrode。
    • EP0563478A2
    • 1993-10-06
    • EP92308816.5
    • 1992-09-28
    • CANON KABUSHIKI KAISHA
    • Hoshika, Norihisa, c/o Canon K.K.
    • G03G15/02G03G15/06G03G15/16
    • G03G15/1675G03G15/0266G03G15/065G03G21/08G03G2215/1652
    • An image forming apparatus includes an image bearing member for bearing a toner image, movable along an endless path; an original supporting platen for supporting an original; an illumination source for illuminating an original on the supporting platen; an image forming device including a charger (10), an exposure optical system, including a reciprocable part, for directing a light image of the original on the supporting platen, a developing device (51) and an image transfer device (4), wherein the reciprocable part moves in a first direction, during an image formation, in which the light image is directed to the image bearing member for image formation thereon and in a second direction, during non-image-formation, for returning the part; wherein the illumination source emits light both during the image formation and during the non-image-formation to direct the light image to the image bearing member, and wherein a developing bias voltage (E d ) in the developing device is switched depending on whether the apparatus is in the image formation or in the non-image-formation so that an image formed on the image bearing member is not developed by the developing device (51) during the non-image-formation.
    • 图像形成装置包括用于承载可沿着环形路径移动的调色剂图像的图像承载部件; 用于支持原件的原始支撑台板; 用于照亮原稿在支撑台板上的照明源; 包括充电器,曝光光学系统的曝光光学系统的图像形成装置,包括用于将原稿的光图像引导到支撑台板上的可往复运动的部件,显影装置和图像转印装置,其中往复运动部件沿第一方向移动, 在图像形成期间,在图像形成期间,在非图像形成期间,光图像被引导到用于图像形成的图像承载部件并且在第二方向上,用于使部件返回; 其中所述照明源在图像形成期间和在非图像形成期间都发光,以将光图像引导到图像承载部件,并且其中显影装置中的显影偏压根据装置是否在 图像形成或非图像形成,使得在图像承载部件中形成的图像在非图像形成期间不被显影装置显影。