公开(公告)号：US06879794B2

公开(公告)日：2005-04-12

申请号：US10074021

申请日：2002-02-14

申请人： Jun Azuma ,  Ayako Yashima ,  Yukimasa Watanabe ,  Keisuke Oba ,  Masashi Fujishima ,  Takashi Nagashima

发明人： Jun Azuma ,  Ayako Yashima ,  Yukimasa Watanabe ,  Keisuke Oba ,  Masashi Fujishima ,  Takashi Nagashima

IPC分类号： G03G5/05 ,  G03G21/00 ,  G03G15/00

CPC分类号： G03G21/0011 ,  G03G5/0564 ,  G03G5/0578

摘要： Disclosed are image forming apparatus [1] which comprises removing a toner remained on the surface of the rotatable image carrier by cleaning means after going through developing means and transferring means; said cleaning means has an elastic blade and is contacted with the surface of the image carrier at a contact pressure within 8 to 20 g/cm, and a press-contact angle of the elastic blade of 12 to 30°; and said image carrier is an organic photosensitive material having a photosensitive layer made of a binder resin containing an electric charge generating material and an electric charge transferring material; and image forming apparatus [2], comprising a single-layer type photosensitive layer made of a binder resin containing an electric charge generating material, an electron transferring material and a hole transferring material, and the solid content of the binder resin is within 50 to 70 wt % of the whole solid content in the photosensitive layer and, a pair of paper transporting rollers are arranged on a path for transporting a transfer paper from paper feeding portion to transferring means, and a paper transporting roller at the side of the surface to be transferred among a pair of paper transporting rollers has cleaning means at the side of the surface to be transferred from the roller.

摘要翻译： 公开了一种图像形成装置[1]，其包括在经过显影装置和转印装置之后通过清洁装置去除可旋转图像载体的表面上残留的调色剂; 所述清洁装置具有弹性叶片，并且以8至20g / cm 2的接触压力和12至30°的弹性片的压接面角度与图像载体的表面接触; 并且所述图像载体是具有由含有电荷产生材料和电荷转移材料的粘合剂树脂制成的感光层的有机感光材料; 和图像形成装置[2]，包括由包含电荷产生材料的粘合剂树脂，电子转移材料和空穴转移材料制成的单层型感光层，并且粘合剂树脂的固体含量在50〜 感光层中的全部固体成分的70重量％，以及一对纸张传送辊布置在用于将转印纸从供纸部分传送到传送装置的路径上，以及在表面侧的纸张传送辊 在一对纸张传送辊之间传送具有在要从辊传送的表面侧面的清洁装置。

公开(公告)号：US07826781B2

公开(公告)日：2010-11-02

申请号：US12051186

申请日：2008-03-19

申请人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

发明人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

IPC分类号： G03G15/09

CPC分类号： G03G15/0921 ,  G03G15/0818 ,  G03G2215/0609

摘要： An image forming apparatus has a photoconductive member, and a developing roller develops a latent image on the photoconductive member by a first alternating-current bias in the form of a rectangular wave. The following relationships are satisfied in calculating the duty ratio (D1) of the first alternating-current bias using an application period of voltage in a direction to transfer the toner from the developing roller towards the photoconductive member as a positive period: a CV value in the number particle size distribution of the toner is ≦25%, 4 μm≦Dt≦7 μm, 105 Ω·cm≦pv≦109 Ω·cm, 0.4 μm≦Ra≦1.5 μm, and 35%≦D1≦75%. where Dt denotes the volume average particle diameter of the toner, pv denotes the intrinsic resistance value of a developing roller surface, Ra denotes the arithmetic average roughness of the developing roller surface.

摘要翻译： 图像形成装置具有感光体，并且显影辊通过矩形波形式的第一交流偏压在感光体上显影潜像。 在使用调色剂从显影辊朝向感光体转印调色剂的方向的电压施加期间，计算第一交流偏压的占空比（D1）为以下关系：CV值 调色剂的数量粒度分布为25％，4μm＆nlE; Dt＆nlE;7μm，105＆OHgr;·cm＆nlE; pv＆nlE; 109＆OHgr;·cm，0.4μm和nlE; Ra＆nlE;1.5μm和35％ ; 75％。 其中Dt表示调色剂的体积平均粒径，pv表示显影辊表面的固有电阻值，Ra表示显影辊表面的算术平均粗糙度。

公开(公告)号：US07773921B2

公开(公告)日：2010-08-10

申请号：US12019744

申请日：2008-01-25

申请人： Masashi Fujishima ,  Kiyotaka Kobayashi ,  Yuki Matsui ,  Yukihiro Mori ,  Sayo Uemura ,  Akihiro Watanabe

发明人： Masashi Fujishima ,  Kiyotaka Kobayashi ,  Yuki Matsui ,  Yukihiro Mori ,  Sayo Uemura ,  Akihiro Watanabe

IPC分类号： G03G15/09

CPC分类号： G03G15/0815 ,  G03G2215/0607

摘要： An image forming apparatus includes a latent image carrying member, a two-component developer carrying member holding on an outer surface a developer containing carrier beads and toner particles, the two-component developer carrying member having a first magnetic element mounted therein, a toner carrying member carrying a thin toner layer on an outer surface, a toner collecting roller for collecting the toner particles scattered and suspended in the vicinity of the two-component developer carrying member and the toner carrying member, the toner collecting roller having a second magnetic element mounted therein, and a housing accommodating the two-component developer carrying member, the toner carrying member and the toner collecting roller. The toner collecting roller is located face to face with the two-component developer carrying member with the first and second magnetic elements disposed to face each other with oppositely directed polarities.

摘要翻译： 图像形成装置包括潜像承载构件，保持在外表面上的包含载体珠和调色剂颗粒的显影剂的双组分显影剂承载构件，所述双组分显影剂承载构件具有安装在其中的第一磁性元件，载体 在外表面上承载薄调色剂层的构件，用于收集散布并悬浮在双组分显影剂承载构件附近的调色剂颗粒的调色剂收集辊和调色剂承载构件，调色剂收集辊具有安装的第二磁性元件 和容纳双组分显影剂承载构件的壳体，调色剂承载构件和调色剂收集辊。 调色剂收集辊与双组分显影剂承载构件面对面地定位，其中第一和第二磁性元件被设置为具有相反方向的极性彼此面对。

公开(公告)号：US20090154962A1

公开(公告)日：2009-06-18

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 visualizing an electrostatic latent image previously formed on the surface of an image carrier as toner image, comprising: 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, wherein 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： 一种将预先形成在图像载体的表面上的静电潜像可视化的显影装置作为调色剂图像，包括：显影辊，其设置在面向图像载体的位置，在其表面上承载调色剂，输送调色剂并使传送的 调色剂到图像载体的表面上; 以及涂覆在显影辊表面上的树脂层，其中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绝对值为6 muC / g以下。

公开(公告)号：US20080232859A1

公开(公告)日：2008-09-25

申请号：US12050219

申请日：2008-03-18

申请人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

发明人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

IPC分类号： G03G15/09

CPC分类号： G03G15/0928 ,  G03G15/0907

摘要： An image forming apparatus has a photoconductive member on which a latent image is to be formed, a developing roller for developing the latent image on the photoconductive member by a first bias. A magnetic roller forms a magnetic brush thereon with a two-component developer and forms a thin toner layer on the developing roller by a second bias. The developing roller is aluminum with a surface treated for high resistance. The thickness (T) of the toner layer and the duty ratio (D1) of the first alternating-current bias satisfy relationships of the following equations for calculating the duty ratio (D1) using an application period of a voltage in a direction to transfer the toner from the developing roller towards the photoconductive member as a positive period: 7 μm≦T≦13 μm, and 35%≦D1≦70%.

摘要翻译： 图像形成装置具有要在其上形成潜像的感光体，用于通过第一偏压在感光体上显影潜像的显影辊。 磁性辊在其上用双组分显影剂形成磁刷，并通过第二偏压在显影辊上形成薄的调色剂层。 显影辊是具有高电阻表面处理的铝。 调色剂层的厚度（T）和第一交流偏置的占空比（D 1）满足以下等式的关系，用于使用电压在施加方向上的施加周期来计算占空比（D 1） 将调色剂从显影辊朝着感光体转移到正周期：<？in-line-formula description =“In-line Formulas”end =“lead”？> 7 mum <= T <= 13 mum， ？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> 35％<= D 1 < = 70％。<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US20080206661A1

公开(公告)日：2008-08-28

申请号：US12068794

申请日：2008-02-12

申请人： Masashi Fujishima ,  Akihiro Watanabe ,  Sayo Uemura ,  Yukihiro Mori

发明人： Masashi Fujishima ,  Akihiro Watanabe ,  Sayo Uemura ,  Yukihiro Mori

IPC分类号： G03G13/04 ,  G03G15/06

CPC分类号： G03G15/0907 ,  G03G15/0808

摘要： An image forming apparatus having a touchdown-development type developing apparatus, in which a toner collecting roller that collects scattered toner suspended in the vicinity of a toner holding body and a two-component developer holding body is arranged on the downstream side in a rotational direction of the two-component developer holding body from a closest position of the two-component developer holding body and the toner holding body, and between the two-component developer holding body and the housing wall, and further, bias means that applies a bias voltage for collecting the scattered toner to the toner collecting roller, and image density sensing means for sensing a density of a toner image developed on the electrostatic latent image holding body surface or a toner image on a transfer body onto which the toner image developed on the electrostatic latent image holding body surface is transferred to control the bias voltage are provided.

摘要翻译： 具有触地显影型显影装置的图像形成装置，其中收集悬浮在调色剂保持体附近的散射调色剂的调色剂收集辊和双组分显影剂保持体设置在旋转方向的下游侧 从双组分显影剂保持体和调色剂保持体的最接近的位置以及双组分显影剂保持体和壳体壁之间的双组分显影剂保持体的偏压装置，以及施加偏压 用于将分散的调色剂收集到调色剂收集辊;以及图像浓度检测装置，用于感测在静电潜像保持体表面上显影的调色剂图像的浓度或调色剂图像在静电上显影的转印体上的调色剂图像 转印潜像保持体表面以控制偏压。

公开(公告)号：US07043181B2

公开(公告)日：2006-05-09

申请号：US10814825

申请日：2004-04-01

申请人： Masashi Fujishima ,  Shoichi Sakata

发明人： Masashi Fujishima ,  Shoichi Sakata

IPC分类号： G03G15/08

CPC分类号： G03G15/0806 ,  G03G2215/0607

摘要： The electrophotographic image formation apparatus of the present invention adopts a developer roller, which is made of aluminum and has an aluminum oxide film of at least 5 μm in thickness formed on surface thereof. In the image formation apparatus, a gap between the developer roller and a photoreceptor drum 3 is set in a range of 150 to 300 μm. The image formation method of the present invention regulates a frequency of AC voltage in a non-development state to be higher than that in a development state, when an AC voltage is applied onto the developer roller to cause flight of toner from the developer roller to the photoreceptor, and selectively makes charged toner fly onto the electrostatic latent image for development. The present invention provides the effective development technique to prevent leakage of the applied voltage between the developer roller and the photoreceptor drum.

摘要翻译： 本发明的电子照相图像形成装置采用由铝制成的显影辊，其表面上形成有至少5μm厚的氧化铝膜。 在图像形成装置中，显影辊和感光鼓3之间的间隙设定在150〜300μm的范围内。 本发明的图像形成方法将非显影状态的交流电压的频率调节为高于显影状态时的交流电压的频率，当将交流电压施加到显影辊上以使得调色剂从显影辊飞行到 感光体，并且选择性地使带电调色剂飞到静电潜像上用于显影。 本发明提供了有效的开发技术，以防止施加的电压在显影辊和感光鼓之间的泄漏。

公开(公告)号：US08682228B2

公开(公告)日：2014-03-25

申请号：US12469812

申请日：2009-05-21

申请人： Hisashi Mukataka ,  Masashi Fujishima ,  Yukihiro Mori

发明人： Hisashi Mukataka ,  Masashi Fujishima ,  Yukihiro Mori

IPC分类号： G03G15/08 ,  G03G15/06 ,  G03G15/09

CPC分类号： G03G15/0921

摘要： A developer includes a developer carrying body that carries a two-component developer having a magnetic toner and a carrier. A toner carrying body opposes the developer carrying body and receives toner from the developer carrying body. An image carrying body develops an electrostatic latent image by toner carried on the toner carrying body. A first magnetic member is inside the developer carrying body and opposes a surface of the toner carrying body. A second magnetic member is inside the toner carrying body and opposes the surface of the developer carrying body. The second magnetic member is magnetized to an opposite polarity to the first magnetic member and generates a magnetic force at least on the surface of the toner carrying body in a range of 25 mT to 40 mT in a direction perpendicular to the surface of the toner carrying body.

摘要翻译： 显影剂包括携带具有磁性调色剂和载体的双组分显影剂的显影剂承载体。 调色剂承载体与显影剂承载体相对并从显影剂承载体接收调色剂。 图像承载体通过携带在调色剂承载体上的调色剂显影静电潜像。 第一磁性构件位于显影剂承载体的内部并与调色剂承载体的表面相对。 第二磁性构件在调色剂承载体的内部并与显影剂承载体的表面相对。 第二磁性构件被磁化成与第一磁性构件相反的极性，并且在垂直于调色剂承载的表面的方向上至少在调色剂承载体的表面上产生在25mT至40mT的范围内的磁力 身体。

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。