公开(公告)号：US5204729A

公开(公告)日：1993-04-20

申请号：US638296

申请日：1991-01-07

申请人： Yasutaka Maeda ,  Taisuke Kamimura ,  Hideyuki Nishimura ,  Tsuyoshi Miyamoto ,  Katsuhiro Nagayama ,  Natsuko Tanaka ,  Yuichi Kazaki

发明人： Yasutaka Maeda ,  Taisuke Kamimura ,  Hideyuki Nishimura ,  Tsuyoshi Miyamoto ,  Katsuhiro Nagayama ,  Natsuko Tanaka ,  Yuichi Kazaki

IPC分类号： G03G15/01 ,  G03G15/04

CPC分类号： G03G15/04027 ,  G03G15/0115

摘要： A full color copying machine which includes intermediate transfer medium whereon toner images having respective color components, formed on a photoreceptor are transferred to form one color toner image, and a screen filter disposed so as to be freely inserted or removed in or from a path of exposure light, which filters the exposure light for exposing the photoreceptor into a pattern of lines. A plurality of color toner images obtained by executing a plurality of copying processes based on a plurality of exposures applied to an original document are superposed on the intermediate transfer medium to form a color toner image. The copying machine further includes a screen mode for inserting a screen filter into a path of exposure light and a normal mode for removing the screen filter from the path of exposure light. Thus, exposures intended for low density components and high density components in an original document image are respectively performed by the use of the different modes, or they are respectively performed by changing setting conditions of the screen filter in the screen mode. With these arrangements, efficient application of the exposure device and high quality of the copied images can be achieved.

摘要翻译： 一种全彩色复印机，其包括中间转印介质，其中形成在感光体上的具有各自颜色成分的调色剂图像被转印以形成单色调色剂图像;以及筛网过滤器，其被设置为在 曝光光，其过滤曝光光以将感光体曝光成线条图案。 通过基于施加到原始文档的多次曝光执行多个复印处理而获得的多个彩色调色剂图像叠加在中间转印介质上以形成彩色调色剂图像。 复印机还包括用于将屏幕过滤器插入曝光光路径的屏幕模式和用于从曝光光线路径移除屏幕过滤器的正常模式。 因此，分别通过使用不同的模式来分别执行原始文档图像中用于低密度分量和高密度分量的曝光，或者它们分别通过在屏幕模式中改变屏幕滤镜的设置条件来执行。 通过这些布置，可以实现曝光装置的有效应用和复印图像的高质量。

公开(公告)号：US5055877A

公开(公告)日：1991-10-08

申请号：US460586

申请日：1990-01-03

申请人： Yasutaka Maeda ,  Natsuko Tanaka ,  Katsuhiro Nagayama ,  Hideyuki Nishimura

发明人： Yasutaka Maeda ,  Natsuko Tanaka ,  Katsuhiro Nagayama ,  Hideyuki Nishimura

IPC分类号： G03G15/01 ,  G03G15/04 ,  G03G15/06

CPC分类号： G03G15/0115 ,  G03G15/04027 ,  G03G15/065 ,  G03G2215/0174

摘要： A copying apparatus in which a screen for improving gradation characteristics of a copied image can be retractably projected into an optical path, including a device for setting, when the screen is placed in the optical path and retracted from the optical path, a developing voltage to a first value and a second value, respectively such that the first value is lower than the second value.

公开(公告)号：US5103266A

公开(公告)日：1992-04-07

申请号：US667839

申请日：1991-03-12

申请人： Tsuyoshi Miyamoto ,  Yasutaka Maeda ,  Taisuke Kamimura ,  Katsuhiro Nagayama ,  Hideyuki Nishimura ,  Natsuko Tanaka

发明人： Tsuyoshi Miyamoto ,  Yasutaka Maeda ,  Taisuke Kamimura ,  Katsuhiro Nagayama ,  Hideyuki Nishimura ,  Natsuko Tanaka

IPC分类号： G03G21/10 ,  G03G15/01 ,  G03G15/08 ,  G03G21/00

CPC分类号： G03G21/0005 ,  G03G15/0105 ,  G03G2215/1661

摘要： A method of cleaning a photosensitive member in an electrophotographic apparatus in which an electrophotographic operation is performed by charging the photosensitive member with a predetermined voltage, exposing the charged photosensitive member so as to form a latent image thereon and developing the latent image by use of toner, includes the steps of charging the photosensitive member with a half tone level voltage which is smaller than the predetermined voltage, and developing the charged photosensitive member by use of toner without exposing the charged photosensitive member, so as to form a uniform half tone toner image thereon. The cleaning method also includes the step of scraping off the toner of the uniform half tone toner image from the photosensitive member by a blade abutting thereto.

摘要翻译： 一种在电子照相设备中清洁感光构件的方法，其中通过以预定电压对感光构件充电来进行电子照相操作，使带电的感光构件曝光以在其上形成潜像并使用调色剂显影潜像 包括以下步骤：以小于预定电压的半色调电平对感光构件充电，并且通过使用调色剂对带电感光构件进行显影而不使曝光带电的感光构件，从而形成均匀的半色调调色剂图像 上。 清洁方法还包括通过与其抵接的叶片从感光构件刮除均匀半色调调色剂图像的调色剂的步骤。

公开(公告)号：US5075731A

公开(公告)日：1991-12-24

申请号：US668293

申请日：1991-03-12

申请人： Taisuke Kamimura ,  Yasutaka Maeda ,  Tuyoshi Miyamoto ,  Katsuhiro Nagayama ,  Hideyuki Nishimura ,  Natsuko Tanaka

发明人： Taisuke Kamimura ,  Yasutaka Maeda ,  Tuyoshi Miyamoto ,  Katsuhiro Nagayama ,  Hideyuki Nishimura ,  Natsuko Tanaka

IPC分类号： G03G15/16

CPC分类号： G03G15/1605

摘要： A transfer roller device for transferring onto a copy paper sheet a full color toner image formed on an intermediate transfer belt. A rear-surface electrode roller disposed at the opposite side to a transfer roller with the intermediate transfer belt positioned in between, is divided into a plurality of cylinder members, and at least one of the cylinder members corresponding to the size of a copy paper sheet is separately connected to ground. With the arrangement, occurrence of an excess current through a portion of the intermediate transfer belt carrying no copy paper sheet thereon is eliminated, thereby preventing a filming phenomenon. In another arrangement, a plurality of rear-surface electrode rollers are disposed at respective positions associated with a plurality of respective copying speeds which are set according to copy paper sheets. Thus, a voltage to be applied between the transfer roller and the rear-surface electrode roller is maintained constant regardless of different copying speeds.

摘要翻译： 一种转印辊装置，用于将形成在中间转印带上的全色调色剂图像转印到复印纸上。 设置在与中间转印带位于其间的转印辊相反侧的后表面电极辊被分成多个气缸构件，并且至少一个气缸构件对应于复印纸的尺寸 分别连接到地面。 通过这种布置，消除了通过其中不携带复印纸的中间转印带的一部分产生过量电流，从而防止了成膜现象。 在另一种布置中，多个后表面电极辊设置在与根据复印纸张设置的多个复印速度相关联的相应位置处。 因此，不管不同的复印速度如何，在转印辊和后表面电极辊之间施加的电压保持恒定。