公开(公告)号：US4267201A

公开(公告)日：1981-05-12

申请号：US85490

申请日：1979-10-17

申请人： Tosio Nakahara ,  Hidetoshi Yano ,  Nobuo Kasahara

发明人： Tosio Nakahara ,  Hidetoshi Yano ,  Nobuo Kasahara

IPC分类号： G03G15/09 ,  B05D1/04 ,  B05D1/06 ,  B05D5/00

CPC分类号： G03G15/09

摘要： A magnetic brush development apparatus comprises a developer application roller and a development roller. When development is stopped, the developer application roller is stopped so that the supply of developer to the development roller is stopped. Normally, the development roller is continuously rotated or when development is stopped, the developer application roller is stopped first and after a while the rotation of the development roller is stopped.

摘要翻译： 磁刷显影装置包括显影剂施加辊和显影辊。 当显影停止时，停止显影剂施加辊，使得显影辊的供应被停止。 通常，显影辊连续旋转或显影停止时，首先停止显影剂施加辊，并且一旦停止显影辊的旋转。

公开(公告)号：US4422405A

公开(公告)日：1983-12-27

申请号：US958872

申请日：1978-11-08

申请人： Nobuo Kasahara ,  Tosio Nakahara ,  Hidetoshi Yano

发明人： Nobuo Kasahara ,  Tosio Nakahara ,  Hidetoshi Yano

IPC分类号： G03G15/01 ,  G03G15/08 ,  G03G15/09 ,  G03G15/00

CPC分类号： G03G15/09

摘要： A single magnetic brush developing unit is disposed adjacent to a photoconductive drum for applying toner thereto. Three applicator units are selectively actuatable to apply three toners of respective primary colors to the developing unit.

摘要翻译： 单个磁刷显影单元邻近于用于向其施加调色剂的感光鼓设置。 三个施加器单元可选择性地致动以将三种相应原色调色剂施加到显影单元。

公开(公告)号：US4872037A

公开(公告)日：1989-10-03

申请号：US163026

申请日：1988-03-02

申请人： Nobuo Kasahara ,  Tosio Nakahara ,  Masayosi Watanuki ,  Tadahide Sawamura

发明人： Nobuo Kasahara ,  Tosio Nakahara ,  Masayosi Watanuki ,  Tadahide Sawamura

IPC分类号： G03G15/00 ,  G03G15/01 ,  G03G15/16

CPC分类号： G03G15/50 ,  G03G15/0131 ,  G03G15/1655 ,  G03G2215/0196

摘要： A control system for a color copier which sets up an adequate color copying time for any particular size of paper sheets. A color document is repeatedly scanned to sequentially expose a single photoconductive drum, which is rotated at a constant speed, to a plurality of separated color components. Each of the latent images is developed by toner complementary in color to the color component associated with the latent image, and sequentially transferred to a paper sheet. The control system includes a paper size setting circuit, a scanning sensor for sensing the start of a scanning, and a home sensor for sensing an instantaneous angular position of the transfer drum. A control circuit is constructed to determine a transfer start and a transfer end time in response to a paper size signal, an output signal of the scanning sensor, and an output signal of the home sensor, and to variably control the rotation speed of the transfer drum during the interval between the transfer start and transfer end times so as to register the leading end of a paper sheet loaded on the transfer drum and that of each of the toner images.

摘要翻译： 用于彩色复印机的控制系统，其为任何特定尺寸的纸张设置足够的彩色复印时间。 重复扫描彩色文件以顺序地将以恒定速度旋转的单个感光鼓暴露于多个分离的颜色分量。 每个潜像由与潜像相关联的颜色成分颜色互补的调色剂显影，并依次转印到纸张上。 控制系统包括纸张尺寸设置电路，用于感测扫描开始的扫描传感器和用于感测转印鼓的瞬时角位置的本地传感器。 控制电路被构造成响应于纸张尺寸信号，扫描传感器的输出信号和家用传感器的输出信号来确定传送开始和传送结束时间，并且可变地控制传送的转速 在传送开始和传送结束时间之间的间隔期间滚筒，以便记录装载在转印鼓上的纸张的前端和每个调色剂图像的前端。

公开(公告)号：US4862214A

公开(公告)日：1989-08-29

申请号：US163084

申请日：1988-03-02

申请人： Nobuo Kasahara ,  Tosio Nakahara

发明人： Nobuo Kasahara ,  Tosio Nakahara

IPC分类号： G03G15/01 ,  G03G15/16 ,  G03G21/00 ,  G03G21/16

CPC分类号： G03G15/0131 ,  G03G15/1655 ,  G03G2215/0193

摘要： In an arrangement of a photoconductive drum and a transfer drum which are installed in a color image forming apparatus, the rotation speed of the transfer drum is increased during the interval between consecutive image transfers so as to increase the recording speed. The photoconductive and transfer drums are each rotatable about a shaft driven independently of the other. A photoconductive drum and a dielectric sheet are wrapped around the photoconductive drum and the transfer drum, respectively. The transfer drum is constituted by a hollow cylindrical frame which is made up of two rotatable rings and a connecting portion which interconnects the two rings. The rings and connecting portion cooperate to define an intermediate opening, and the dielectric sheet is positioned to close the intermediate opening. The axial width of the photoconductive drum is smaller than that of the intermediate opening. In opposite end portions of the photoconductive drum where the photoconductive material is absent, positioning disks are provided each making direct rolling contact with a portion of a respective one of the rotatable rings where the dielectric sheet is absent.

摘要翻译： 在安装在彩色图像形成装置中的感光鼓和转印鼓的布置中，转印鼓的旋转速度在连续的图像转印之间的间隔期间增加，从而提高记录速度。 光电导体和转印鼓各自可以独立于另一个驱动的轴旋转。 感光鼓和电介质片分别缠绕在感光鼓和转印鼓周围。 转印鼓由两个可旋转环组成的中空圆柱形框架和连接两个环的连接部分构成。 环和连接部分协作以限定中间开口，并且电介质片被定位成封闭中间开口。 感光鼓的轴向宽度小于中间开口的轴向宽度。 在不存在光电导材料的感光鼓的相对端部，设有定位盘，每个定位盘与不存在电介质片的相应一个可旋转环的一部分直接滚动接触。

公开(公告)号：US4864367A

公开(公告)日：1989-09-05

申请号：US185684

申请日：1988-04-22

申请人： Tosio Nakahara ,  Nobuo Kasahara

发明人： Tosio Nakahara ,  Nobuo Kasahara

IPC分类号： G03G15/01 ,  B65H5/12 ,  G03G15/00 ,  G03G15/16

CPC分类号： G03G15/1655

摘要： A device applicable to a color copier or the like for transferring an image to a paper sheet which includes a hollow drumlike frame the peripheral wall of which is removed except for opposite circumferential edge portions and a connecting portion which links the edge portions to each other. A conductive sheet is wrapped around the frame to cover the removed portion of the frame. An intermediate portion of the conductive sheet is bulged radially outward beyond the outer periphery of the frame.