公开(公告)号：US20060263111A1

公开(公告)日：2006-11-23

申请号：US11434852

申请日：2006-05-16

申请人： Hiroyuki Hamakawa ,  Takaaki Kamei ,  Yoshihiro Yamagishi ,  Koji Suenami ,  Hirohisa Endou

发明人： Hiroyuki Hamakawa ,  Takaaki Kamei ,  Yoshihiro Yamagishi ,  Koji Suenami ,  Hirohisa Endou

IPC分类号： G03G15/08

CPC分类号： G03G15/0942

摘要： A developing device includes a developing sleeve for supplying toner particles to a latent image area on a peripheral surface of a photoconductive drum while rotating about an axis. The developing sleeve has a permanent magnet therein. Two magnetic members are provided in the developing device and face opposite ends of a peripheral surface of the developing sleeve at a predetermined distance from the developing sleeve. The magnetic members have arc-shaped inner surfaces. A blade is spaced a predetermined distance from a central portion of the peripheral surface of the developing sleeve. The blade adjusts the amount of toner particles supplied to the photoconductive drum. The gap between the arc-shaped inner surface of the magnetic member and the peripheral surface of the developing sleeve gradually increases from upstream to downstream in a rotational direction of the developing sleeve.

摘要翻译： 显影装置包括显影套筒，用于在绕轴线旋转的同时将调色剂颗粒供应到感光鼓的外周表面上的潜像区域。 显影套筒中具有永磁体。 在显影装置中设置有两个磁性构件，并且与显影套筒相隔一预定距离的两个磁性构件面对显影套筒的周面的相对端。 磁性构件具有弧形内表面。 叶片与显影套筒的外围表面的中心部分隔开预定的距离。 刀片调节供应到感光鼓的调色剂颗粒的量。 磁性构件的弧形内表面与显影套筒的周面之间的间隙在显影套筒的旋转方向上从上游到下游逐渐增加。

公开(公告)号：US5121165A

公开(公告)日：1992-06-09

申请号：US426748

申请日：1989-10-24

申请人： Seitaro Yoshida ,  Kunio Nakai ,  Shinji Ogaki ,  Hiroshi Kageyama ,  Sueaki Okamoto ,  Hiroyuki Hamakawa ,  Yoshiaki Tabata ,  Kenichi Ashida

发明人： Seitaro Yoshida ,  Kunio Nakai ,  Shinji Ogaki ,  Hiroshi Kageyama ,  Sueaki Okamoto ,  Hiroyuki Hamakawa ,  Yoshiaki Tabata ,  Kenichi Ashida

IPC分类号： G03G15/08

CPC分类号： G03G15/0896 ,  G03G15/0865 ,  G03G15/0877 ,  G03G15/0886

摘要： A toner hopper which is arranged upwards of the developing unit is elevatably supported in the image forming device in the vertical direction thereof and the connection between the toner hopper and the developing unit can be cancelled by lifting up the toner hopper when drawing out the developing unit so that the structure of the connection portion therebetween can be simplified and the sliding portion can be eliminated to thereby eliminate wearing at the connection therebetween. Furthermore, an apparatus for automatically raising and lowering the toner hopper and an apparatus for maintaining the horizontality of the toner hopper when being elevated and lowered is provided.

公开(公告)号：US08249489B2

公开(公告)日：2012-08-21

申请号：US13184262

申请日：2011-07-15

申请人： Hiroyuki Hamakawa ,  Akihiro Watanabe ,  Masashi Fujishima ,  Hiroshi Yamazaki ,  Asami Kotera ,  Sayo Uemura

发明人： Hiroyuki Hamakawa ,  Akihiro Watanabe ,  Masashi Fujishima ,  Hiroshi Yamazaki ,  Asami Kotera ,  Sayo Uemura

IPC分类号： G03G15/08

CPC分类号： G03G15/0818

摘要： A developing unit includes a developing roller which rotates about a rotational axis to supply toner to a photoreceptor, and a magnetic roller which forms a magnetic brush with a two-component developing agent having carrier and the toner and thereby forms a toner layer on the developing roller, the developing roller including: a cylindrical core portion which includes an electric conductor; a first resistive layer which covers a cylindrical surface of the core portion; a second resistive layer which covers the first resistive layer, and has electric-resistivity lower than that of the first resistive layer; and a current leakage control member which prevents leakage of electric current from the core portion toward the second resistive layer through an end of the developing roller along a direction of the rotational axis.

摘要翻译： 显影单元包括围绕旋转轴线旋转以向感光体供应调色剂的显影辊和形成具有载体的二组分显影剂和调色剂并由此在显影剂上形成调色剂层的磁刷的磁性辊 所述显影辊包括：包括电导体的圆柱形芯部; 覆盖所述芯部的圆筒面的第一电阻层; 第二电阻层，其覆盖所述第一电阻层，并且电阻率低于所述第一电阻层的电阻率; 以及电流泄漏控制构件，其防止电流从所述芯部朝向所述第二电阻层通过所述显影辊的端部沿着所述旋转轴线的方向泄漏。

公开(公告)号：US07826782B2

公开(公告)日：2010-11-02

申请号：US12331692

申请日：2008-12-10

申请人： Asami Kotera ,  Hiroyuki Hamakawa ,  Akihiro Watanabe ,  Masashi Fujishima ,  Hiroshi Yamazaki ,  Sayo Uemura

发明人： Asami Kotera ,  Hiroyuki Hamakawa ,  Akihiro Watanabe ,  Masashi Fujishima ,  Hiroshi Yamazaki ,  Sayo Uemura

IPC分类号： G03G15/09

CPC分类号： G03G15/0928 ,  G03G2215/0861

摘要： A developing device is provided for visualizing an electrostatic latent image previously formed on the surface of an image carrier as a toner image. The developing device has a developing roller placed at a position facing the image carrier, carrying a toner on the surface thereof, conveying the toner and flying the conveyed toner onto the surface of the image carrier; and a resin layer coated on the surface of the developing roller. The absolute value of the difference in charge between the toners in the upper and lower layers of the toner layer formed on the developing roller as the toner carried on the developing roller is 6 μC/g or less.

摘要翻译： 提供了一种显影装置，用于将预先形成在图像载体的表面上的静电潜像可视化为调色剂图像。 显影装置具有位于面向图像载体的位置的显影辊，在其表面上承载调色剂，输送调色剂并将所输送的调色剂飞行到图像载体的表面上; 以及涂覆在显影辊表面上的树脂层。 在显影辊上承载的调色剂上形成在显影辊上的调色剂层的上层和下层中的调色剂之间的电荷差的绝对值为6μC/ g以下。

公开(公告)号：US07555247B2

公开(公告)日：2009-06-30

申请号：US11277362

申请日：2006-03-24

申请人： Koji Suenami ,  Hiroyuki Hamakawa ,  Takaaki Kamei ,  Asami Kotera ,  Yoshihiro Yamagishi ,  Eiji Nimura ,  Takahiko Murata

发明人： Koji Suenami ,  Hiroyuki Hamakawa ,  Takaaki Kamei ,  Asami Kotera ,  Yoshihiro Yamagishi ,  Eiji Nimura ,  Takahiko Murata

IPC分类号： G03G15/08

CPC分类号： G03G15/0822 ,  G03G2215/0822 ,  G03G2215/0827 ,  G03G2215/0838

摘要： A developing device includes a container for containing toner, a rotatable shaft provided in the container, a spiral shaped blade formed on an outer circumference of the shaft, and a first spiral member for conveying the toner in the longitudinal direction of the shaft by means of rotation. In addition, a toner removing member is provided for removing the toner attached to the first spiral member. Then, by rotation of the first spiral member, the toner removing member is moved in the longitudinal direction of the shaft and the direction that is orthogonal to the longitudinal direction of the shaft so as to be in contact with the surface of the first spiral member. Accordingly, it is possible to adequately scrape the toner off the spiral shaped blade and the shaft, thereby effectively prevent an aggregation of toner from occurring.

摘要翻译： 显影装置包括容纳调色剂的容器，设置在容器中的旋转轴，形成在轴的外圆周上的螺旋形叶片，以及用于沿着轴的纵向方向传送调色剂的第一螺旋构件，借助于 回转。 此外，设置有去除附着在第一螺旋构件上的调色剂的调色剂去除构件。 然后，通过旋转第一螺旋构件，调色剂除去构件沿着轴的纵向方向和与轴的纵向方向垂直的方向移动以与第一螺旋构件的表面接触 。 因此，可以将螺旋形叶片和轴上的调色剂充分地刮掉，从而有效地防止调色剂的聚集。

公开(公告)号：US20060257162A1

公开(公告)日：2006-11-16

申请号：US11416339

申请日：2006-05-02

申请人： Koji Suenami ,  Eiji Nimura ,  Hirohisa Endou ,  Hiroyuki Hamakawa ,  Yoshihiro Yamagishi

发明人： Koji Suenami ,  Eiji Nimura ,  Hirohisa Endou ,  Hiroyuki Hamakawa ,  Yoshihiro Yamagishi

IPC分类号： G03G15/08

CPC分类号： G03G15/0942 ,  G03G2215/0609 ,  G03G2215/0634

摘要： A developing device (50) includes a developing sleeve (53) for supplying toner particles (T) to a latent image area (22) on a peripheral surface of a photoconductive drum (20) while rotating about a central shaft (534). The developing sleeve (53) has an immovable sleeve magnet (533) therein. Two magnetic members (82) are disposed in opposite end portions of the developing sleeve (53) and are spaced a predetermined distance from the peripheral surface of the developing sleeve. Each magnet member (82) has an arc shape. A magnetic member magnet (83) is mounted in the magnet member (82) and faces a sleeve magnet (533) so that opposite facing portions of the magnetic member magnet (83) and the sleeve magnet (533) have the same polarity. With this construction, toner particles are prevented from leaking from the end portions of the developing sleeve (53).

摘要翻译： 显影装置（50）包括用于在绕中心轴（534）旋转的同时将调色剂颗粒（T）供应到感光鼓（20）的外周表面上的潜像区域（22）的显影套筒（53）。 显影套筒（53）中具有不可移动的套筒磁体（533）。 两个磁性构件（82）设置在显影套筒（53）的相对端部，并且与显影套筒的外围表面隔开预定的距离。 每个磁体构件（82）具有弧形。 磁性构件磁体（83）安装在磁体构件（82）中并且面向套筒磁体（533），使得磁性构件磁体（83）和套筒磁体（533）的相对的相对部分具有相同的极性。 利用这种结构，防止调色剂颗粒从显影套筒（53）的端部泄漏。

公开(公告)号：US20060245790A1

公开(公告)日：2006-11-02

申请号：US11399622

申请日：2006-04-07

申请人： Hiroyuki Hamakawa ,  Koji Suenami ,  Hirohisa Endou

发明人： Hiroyuki Hamakawa ,  Koji Suenami ,  Hirohisa Endou

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/751 ,  G03G15/0806

摘要： A control part 33 rotates a developer roller 21a at a second rotation speed, which is slower than a normal rotation speed during an image formation period (first rotation speed), during a non-image formation period while a heater 14 is in use. This prevents deformation of the developer roller 21a caused by radiant heat from a photoconductive drum 41, effectively prevents the appearance of image fogging, concentration unevenness, and the like, and also suppresses toner deterioration in a development unit 21.

摘要翻译： 控制部33在加热器14使用时的非图像形成期间以图像形成期间（第一旋转速度）以比正常旋转速度慢的第二旋转速度旋转显影辊21a。 这防止了由感光鼓41的辐射热引起的显影辊21a的变形，有效地防止了图像起雾，集中不均匀等的出现，并且还抑制了显影单元21中的调色剂劣化。

公开(公告)号：US5634174A

公开(公告)日：1997-05-27

申请号：US609542

申请日：1996-03-01

申请人： Shingo Mori ,  Takashi Nagashima ,  Hiroyuki Hamakawa ,  Kiyoaki Miyamoto ,  Yukihiro Aikawa

发明人： Shingo Mori ,  Takashi Nagashima ,  Hiroyuki Hamakawa ,  Kiyoaki Miyamoto ,  Yukihiro Aikawa

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/0822 ,  G03G15/0849 ,  G03G15/0853 ,  G03G15/0889

摘要： A developer unit of the present invention has an agitating paddle which agitates a developer containing a magnetic carrier and a non-magnetic toner, and a toner is supplied from the toner hopper according to an output of a toner concentration sensor. After an agitation is finished which is performed when the power is turned on, the agitating paddle is periodically operated to agitate the developer. During the agitation, a toner concentration controller shifts a reference level with which the output of the toner concentration sensor is compared from a predetermined level to a higher level and then stepwisely returns it to the predetermined level.

摘要翻译： 本发明的显影剂单元具有搅拌桨，其搅拌含有磁性载体和非磁性调色剂的显影剂，并且根据调色剂浓度传感器的输出从调色剂料斗供应调色剂。 在电源打开完成搅拌结束后，周期性地操作搅拌桨来搅拌显影剂。 在搅拌期间，调色剂浓度控制器将调色剂浓度传感器的输出与预定水平进行比较的基准水平移动到较高水平，然后逐步地将其返回到预定水平。