公开(公告)号：US06904255B2

公开(公告)日：2005-06-07

申请号：US10479119

申请日：2001-05-31

申请人： Hiroshi Kera ,  Atsushi Tano ,  Hiroki Ohta ,  Tsuneo Mizuno

发明人： Hiroshi Kera ,  Atsushi Tano ,  Hiroki Ohta ,  Tsuneo Mizuno

IPC分类号： G03G15/01 ,  G03G15/08

CPC分类号： G03G15/0131 ,  G03G2215/0119 ,  G03G2215/0495

摘要： The present invention relates to a color image forming device for forming toner images of a plurality of colors on a medium, and is for improving second transfer efficiency from an intermediate transfer body to the medium. The device has image forming units (12-1 to 12-4) for forming the toner images of the plurality of colors on at least one image bearing body (14-1 to 14-4) by a plurality of developing units (22-1 to 22-4) respectively accommodating toner of different colors; an intermediate transfer body (24); primary transfer means (38-1 to 38-4) for primary transferring the toner images of the plurality of colors onto the intermediate transfer body sequentially for the respective colors; and secondary transfer means (45) for secondary transferring the toner images of the plurality of colors on the intermediate transfer body onto the medium. The image forming units form the toner images of the plurality of colors so that the potentials of toner layers transferred onto the intermediate transfer body (24) are progressively lower in the order in which the plurality of colors are transferred. Since the potential of the toner layer directly adhered to the intermediate transfer body is higher, the directly adhered toner layer becomes easier to be secondary-transferred, and thereby, the secondary transfer efficiency is improved and the reproducibility of the secondary color is improved.

摘要翻译： 本发明涉及一种用于在介质上形成多种颜色的调色剂图像的彩色图像形成装置，并且用于提高从中间转印体到介质的第二转印效率。 该装置具有用于通过多个显影单元（22-1至14-4）在至少一个图像承载体（14-1至14-4）上形成多种颜色的调色剂图像的图像形成单元（12-1至12-4） 1至22-4）分别容纳不同颜色的调色剂; 中间转印体（24）; 一次转印装置（38-1至38-4），用于将各种颜色的调色剂图像一次转印到中间转印体上，用于各种颜色; 以及用于将中间转印体上的多种颜色的调色剂图像二次转印到介质上的二次转印装置（45）。 图像形成单元形成多种颜色的调色剂图像，使得转印到中间转印体（24）上的调色剂层的电位以传递多种颜色的顺序逐渐降低。 由于调色剂层直接附着在中间转印体上的电位较高，所以直接附着的调色剂层变得容易二次转印，从而提高二次转印效率，提高二次色的再现性。

公开(公告)号：US5530528A

公开(公告)日：1996-06-25

申请号：US103807

申请日：1993-08-10

申请人： Yoji Houki ,  Makoto Matsuoka ,  Takeo Kojima ,  Akira Takahashi ,  Mitsuhito Furukawa ,  Hiroshi Kera

发明人： Yoji Houki ,  Makoto Matsuoka ,  Takeo Kojima ,  Akira Takahashi ,  Mitsuhito Furukawa ,  Hiroshi Kera

IPC分类号： G03G15/08 ,  G03G21/00

CPC分类号： G03G15/0806 ,  G03G15/0856 ,  G03G15/0862

摘要： An image forming apparatus having a developing unit for developing an electrostatic latent image on a photosensitive drum with a one-component toner, consisting of an endless latent image carrier; an image forming unit for forming an electrostatic latent image on the image carrier; a developing unit, for causing the developing roller to contact the image carrier to develop the electrostatic latent image on the image carrier; a mechanism for driving the developing unit; a toner sensor for detecting the presence/absence of the toner in the developing unit; and an abutting/detaching mechanism for abutting or detaching the developing roller of the developing unit on or from the image carrier. According to one aspect of this invention, this apparatus further has a controller for executing an image forming mode to control image formation in response to an image forming instruction, and a developer supply mode for, with the developing roller set apart from the image carrier, driving the driving mechanism to supply the toner to the developing roller in accordance with an output of the toner sensor indicating an insufficient amount of the toner.

摘要翻译： 一种图像形成装置，具有显影单元，用于利用由无限潜像载体构成的单组分调色剂在感光鼓上显影静电潜像; 图像形成单元，用于在所述图像载体上形成静电潜像; 显影单元，用于使显影辊接触图像载体以在图像载体上显影静电潜像; 用于驱动显影单元的机构; 用于检测显影单元中调色剂的存在/不存在的调色剂传感器; 以及用于将显影单元的显影辊抵接或分离在图像载体上或从图像载体上脱离的抵接/分离机构。 根据本发明的一个方面，该装置还具有控制器，用于执行图像形成模式以响应于图像形成指令来控制图像形成;以及显影剂供应模式，其中显影辊与图像载体分离， 驱动驱动机构以根据调色剂传感器的输出将调色剂供应到显影辊，该输出指示调色剂的量不足。

公开(公告)号：US6128463A

公开(公告)日：2000-10-03

申请号：US865770

申请日：1997-05-30

申请人： Yoshiya Matsumoto ,  Shigeo Nonoyama ,  Tetsuya Takei ,  Nobuo Kuwabara ,  Hiroshi Kera ,  Takefumi Takahashi ,  Yoshio Yamaguchi ,  Akira Nagahara

发明人： Yoshiya Matsumoto ,  Shigeo Nonoyama ,  Tetsuya Takei ,  Nobuo Kuwabara ,  Hiroshi Kera ,  Takefumi Takahashi ,  Yoshio Yamaguchi ,  Akira Nagahara

IPC分类号： B41J13/00 ,  B65H29/58 ,  B65H29/60 ,  G03G15/00 ,  G03G15/23

CPC分类号： G03G15/6552 ,  B65H29/58 ,  B65H85/00 ,  G03G15/231 ,  G03G15/6591 ,  G03G15/6594 ,  B65H2404/611 ,  B65H2404/632 ,  G03G2215/00472 ,  G03G2215/00497 ,  G03G2215/00514

摘要： An image forming device includes an image forming part which forms an image on a recording medium; a recording medium switchback portion which receives the recording medium on a first run, one side of which has been printed when passing the image forming part, and sends the recording medium for a second run; a recording medium path which communicates with the recording medium switchback portion so as to send the recording medium to and from the recording medium switchback portion; an inverted recording medium transfer path through which the recording medium is sent to the image forming part again with an upper surface and a lower surface of the recording medium reversed; and a recording medium transfer part which transfers the recording medium along the inverted recording medium transfer path. The image forming device is further provided with a first recording medium receiving portion which stores the recording medium one on another with a printed surface facing upwards; and a first recording medium ejection path which communicates with the recording medium receiving portion so as to send the recording medium to the first recording medium receiving portion.

摘要翻译： 图像形成装置包括：图像形成部，其在记录介质上形成图像; 记录介质回转部分，其在第一行程接收记录介质，其一侧在通过图像形成部分时已经被打印，并且发送记录介质用于第二行程; 记录介质路径，其与记录介质转回部分通信，以将记录介质发送到记录介质转回部分; 反转记录介质传送路径，记录介质再次被传送到图像形成部分，记录介质的上表面和下表面反转; 以及记录介质传送部件，其沿着反转的记录介质传送路径传送记录介质。 图像形成装置还设置有第一记录介质接收部分，其将打印表面朝上的另一记录介质存储; 以及与记录介质接收部分通信以将记录介质发送到第一记录介质接收部分的第一记录介质排出路径。

公开(公告)号：US5848343A

公开(公告)日：1998-12-08

申请号：US886416

申请日：1997-07-01

申请人： Takefumi Takahashi ,  Shizuo Takano ,  Yoshio Yamaguchi ,  Hiroshi Kera ,  Akira Nagahara ,  Yoshiya Ishiyama ,  Hideki Kamaji ,  Toshio Tooda

发明人： Takefumi Takahashi ,  Shizuo Takano ,  Yoshio Yamaguchi ,  Hiroshi Kera ,  Akira Nagahara ,  Yoshiya Ishiyama ,  Hideki Kamaji ,  Toshio Tooda

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

CPC分类号： G03G21/0005 ,  G03G15/0822

摘要： An electrophotographic image forming apparatus includes an electrostatic latent image carrying body, an electrifying unit for electrifying the image carrying body, a light irradiating unit to form an electrostatic latent image in accordance to image information, a developing unit for discharging toner to the image carrying body to develop the latent image, a transfer unit for transferring the toner image to a recording sheet, and a cleaner for removing residual toner on the image carrying body. The toner removed from the image carrying body is recirculated to the developer receiving box. An additional toner image is formed on a position other than a first position where the electrostatic latent image is formed in accordance with the image information. The toner is removed by the cleaner without being transferred to the recording sheet and recirculated from the image carrying body to the developer receiving box.

摘要翻译： 电子照相图像形成装置包括静电潜像携带体，用于使图像承载体带电的带电单元，根据图像信息形成静电潜像的光照射单元，用于将墨粉排出到图像载体上的显影单元 显影潜像，用于将调色剂图像转印到记录片材的转印单元，以及用于除去图像载体上的残留调色剂的清洁剂。 从图像承载体移除的调色剂被再循环到显影剂接收盒。 在根据图像信息形成静电潜像的第一位置之外的位置处形成附加的调色剂图像。 调色剂被清洁剂除去而不被转印到记录纸上并从图像承载体再循环到显影剂接收盒。

公开(公告)号：US5164773A

公开(公告)日：1992-11-17

申请号：US540728

申请日：1990-06-20

申请人： Yukio Nishio ,  Hiroshi Kera ,  Yoshihiro Tonomoto ,  Kazunori Hirose

发明人： Yukio Nishio ,  Hiroshi Kera ,  Yoshihiro Tonomoto ,  Kazunori Hirose

IPC分类号： G03G15/06 ,  G03G15/08

CPC分类号： G03G15/065 ,  G03G15/0806 ,  G03G15/0812 ,  G03G2215/0614 ,  G03G2215/0636

摘要： A developing device using a one-component developer composed of toner particles includes a developing roller rotatably provided within the vessel, a portion of the developing roller being exposed therefrom and resiliently pressed against a surface of a photosensitive drum. The toner particles are entrained by the roller surface to form a developer layer therearound and are carried to the drum surface for the development of an electrostatic latent image formed thereon, and a blade member is engaged with the roller for regulating a thickness of the developer layer. A voltage is supplied to the roller to electrostatically move the toner particles from the roller to the latent image, and a voltage is applied to the blade member to inject an electrical charge to the developer layer. When an operation of the device is started, a supply of the voltages to the roller and blade member is carried out after the roller is rotated. When the operation is interrupted or stopped, the supply of the voltage to the blade member is prematurely stopped before the supply of the voltage to the roller and the rotation thereof are stopped.

公开(公告)号：US5852757A

公开(公告)日：1998-12-22

申请号：US680959

申请日：1996-07-16

申请人： Toshio Tooda ,  Yoshio Yamaguchi ,  Nobuo Kuwabara ,  Mituru Sato ,  Haruyasu Watanabe ,  Akira Nagahara ,  Sachio Sasaki ,  Yoshiya Ishiyama ,  Hiroshi Kera ,  Masanori Nishido ,  Hisashi Hanzawa

发明人： Toshio Tooda ,  Yoshio Yamaguchi ,  Nobuo Kuwabara ,  Mituru Sato ,  Haruyasu Watanabe ,  Akira Nagahara ,  Sachio Sasaki ,  Yoshiya Ishiyama ,  Hiroshi Kera ,  Masanori Nishido ,  Hisashi Hanzawa

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

CPC分类号： G03G15/0822 ,  G03G21/105

摘要： An electrophotographic image forming apparatus including a toner circulating mechanism for recovering a residual toner scraped from a photosensitive drum to a developing device. The developing device includes a housing for defining a toner chamber, a developing roller rotatably mounted in the housing, an agitator rotatably mounted in the housing and provided in the toner chamber, and a partition member mounted to the housing to define a carrier chamber between the partition member and the developing roller. The toner circulating mechanism directly returns the residual toner scraped from the photosensitive drum to the toner chamber in the developing device. The toner chamber may contain a foreign matter removing device. The partition member may have various shapes.

摘要翻译： 一种电子照相图像形成装置，包括调色剂循环机构，用于将从感光鼓刮下的残余调色剂回收到显影装置。 显影装置包括用于限定调色剂室的壳体，可旋转地安装在壳体中的显影辊，可旋转地安装在壳体中并设置在调色剂室中的搅拌器，以及安装到壳体上以在其间形成载体室的分隔构件 分隔构件和显影辊。 调色剂循环机构将从感光鼓刮下的残留调色剂直接返回到显影装置中的调色剂室。 调色剂室可以含有异物去除装置。 分隔构件可以具有各种形状。