公开(公告)号：US06917780B2

公开(公告)日：2005-07-12

申请号：US10173416

申请日：2002-06-13

申请人： Yoshio Ozawa ,  Eiji Ochiai ,  Shoichi Sakata ,  Toshinori Nishimura ,  Masayoshi Yamada

发明人： Yoshio Ozawa ,  Eiji Ochiai ,  Shoichi Sakata ,  Toshinori Nishimura ,  Masayoshi Yamada

IPC分类号： G03G15/08

CPC分类号： G03G15/0808 ,  G03G2215/0607 ,  G03G2215/0634

摘要： An image forming apparatus of non-contact developing method using two-component developer material which is capable of obtaining a clear image free from fogging, ghost and toner contamination. The image forming apparatus has at least one developing unit which includes a developing roll and a magnetic roll, the developing unit develops an electrostatic latent image on a photosensitive body with a toner thin layer formed on the surface of a developing roll wherein a toner thin layer forming region on the developing roll is smaller than a magnetic brush forming region on the magnetic roll. A high resistivity region is adjacent each end of the toner thin layer forming region on the developing roll. A control device controls a developer material replenishment and controls the biasing to the developing roll and magnetic roll.

摘要翻译： 一种使用双组分显影剂材料的非接触显影方法的图像形成装置，其能够获得没有起雾，重影和调色剂污染的清晰图像。 图像形成装置具有至少一个包括显影辊和磁性辊的显影单元，显影单元在感光体上显影，其中形成在显影辊表面上的调色剂薄层，其中调色剂薄层 显影辊上的成膜区域小于磁辊上的磁刷形成区域。 高电阻率区域与显影辊上的调色剂薄层形成区域的每一端相邻。 控制装置控制显影剂材料补充并控制对显影辊和磁辊的偏置。

公开(公告)号：US06868240B2

公开(公告)日：2005-03-15

申请号：US10388563

申请日：2003-03-14

申请人： Yoshio Ozawa ,  Shoichi Sakata ,  Toshinori Nishimura

发明人： Yoshio Ozawa ,  Shoichi Sakata ,  Toshinori Nishimura

IPC分类号： G03G15/09 ,  G03G21/00

CPC分类号： G03G15/0907

摘要： To avoid developing ghost and selective developing without complicating a developing apparatus and to supply surly charged toner to a developing roll while unevenness of images is not generated to obtain stable images for a long time even when continuous printing, a method for developing in a hybrid developing apparatus is provided, which is characterized in that a data amount of each image, which an image forming apparatus prints and a number of paper sheets passed are detected and that an interval of the action of recovering and exchanging a toner layer on the developing roll to the magnetic roll after printing between paper sheets is variably set in accordance with a printing coefficient determined by the data amount and the number of paper sheets passed and further, a method for developing in a color tandem-type image forming apparatus provided with a plurality of the hybrid developing apparatuses for all different colors of toner, which are disposed along the moving direction of a transfer medium of images is provided, wherein after toner layers on the developing rolls of the all developing apparatuses are peeled off toward the magnetic rolls after developing, a thickness of the toner layer of the each developing apparatus is variably controlled at the beginning of developing in accordance with the image consistency of the developing apparatus having a highest image consistency among image data of toner colors.

摘要翻译： 为了避免在不使显影装置复杂化的情况下发生重影和选择性显影，并且即使在连续印刷时也不产生不均匀图像以获得稳定图像的显影辊中的充满电的调色剂，用于在混合显影中发展的方法 提供了一种装置，其特征在于，检测图像形成装置打印的每张图像的数据量和通过的纸张数量，并且将显影辊上的调色剂层回收和更换的动作的间隔设置为 根据由数据量和通过的纸张数量确定的打印系数，可变地设置在纸张之间打印之后的磁辊，并且还提供了一种在具有多个纸张的彩色串列型图像形成装置中显影的方法 用于所有不同颜色的调色剂的混合显影装置沿着a的移动方向设置 提供了图像的转印介质，其中在显影之后，在显影装置的显影辊上的调色剂层之后朝向磁性辊剥离，每个显影装置的调色剂层的厚度在显影开始时被可变地控制 根据调色剂图像数据之间具有最高图像一致性的显影装置的图像一致性。

公开(公告)号：US06829448B2

公开(公告)日：2004-12-07

申请号：US10396080

申请日：2003-03-25

申请人： Yoshio Ozawa ,  Yuji Kamiyama ,  Shoichi Sakata ,  Toshinori Nishimura

发明人： Yoshio Ozawa ,  Yuji Kamiyama ,  Shoichi Sakata ,  Toshinori Nishimura

IPC分类号： G03G1508

CPC分类号： G03G15/0815 ,  G03G2215/0624

摘要： A method and apparatus for image forming includes a hybrid developing apparatus that supplies surly charged toner to a developing roll. The apparatus includes a developing roll that is electrically conductive at least on its surface. The image forming apparatus and the method have a constitution capable of applying an alternating current bias having a duty ratio in the range of 10 to 50% and a direct current bias superposed thereon. The developing roll is directly confronted with a latent image bearing body through an insulative toner thin layer at the nearest region of the developing roll and the latent image bearing body. An independent bias is applied to each of the developing roll and the magnetic roll, and the toner is refreshed by the varying duty ratio of the alternate current bias and the direct current bias after developing.

摘要翻译： 图像形成方法和装置包括向显影辊供给带电荷的调色剂的混合显影装置。 该装置包括至少在其表面上导电的显影辊。 图像形成装置和方法具有能够施加占空比在10〜50％的范围内的交流偏压和叠加在其上的直流偏压的结构。 显影辊在显影辊和潜像承载体的最近的区域处通过绝缘性调色剂薄层直接面对潜像承载体。 对显影辊和磁辊中的每一个施加独立的偏压，并且调色剂由显影后的交流偏压和直流偏压的变化占空比来刷新。

公开(公告)号：US06512909B2

公开(公告)日：2003-01-28

申请号：US09922003

申请日：2001-07-31

申请人： Yoshio Ozawa ,  Eiji Ochiai ,  Shoichi Sakata

发明人： Yoshio Ozawa ,  Eiji Ochiai ,  Shoichi Sakata

IPC分类号： G03G1509

CPC分类号： G03G13/08 ,  G03G15/065 ,  G03G2215/0607 ,  G03G2215/0634

摘要： When image formation is performed by an apparatus comprising: a magnetic roll for generating a magnetic brush by carrier having toner adhering triboelectrically thereto, a developer roll on the surface of which a thin layer of the toner supplied by the magnetic brush is formed, and a photoreceptor onto which the toner of thin layer jumps selectively in accordance with the latent image thereon; positively chargeable toner of which charge amount is controlled in 5˜20 &mgr;C/g is used, the surface potential of the photoreceptor is set to a range above 0 to 250 V, and the after exposure potential which is the potential right after the photoreceptor is exposed is in a range of 0˜ to 100 V.

公开(公告)号：US07848686B2

公开(公告)日：2010-12-07

申请号：US12127151

申请日：2008-05-27

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

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

IPC分类号： G03G15/09 ,  G03G15/08

CPC分类号： G03G15/095 ,  G03G15/0815

摘要： A developing device uses a two-component developer including at least carriers and toners. The toners are supplied to an image bearing member bearing an electrostatic latent image so that a toner image is developed from the electrostatic latent image. The developing device has a developing roller arranged to oppose the image bearing member; and a magnetic roller arranged to oppose the developing roller. The magnetic roller retains the two-component developer to supply toners to the developing roller. The developing roller and the magnetic roller are rotationally driven in directions to be opposite from one another at an opposed position, and a magnetic pole of the magnetic roller and a magnetic pole of the developing roller have magnetic polarities different from one another at the opposed position. A surface roughness of the magnetic roller is greater than a surface roughness of the developing roller.

摘要翻译： 显影装置使用包括至少载体和调色剂的双组分显影剂。 将调色剂供应到承载静电潜像的图像承载部件，使得调色剂图像从静电潜像显影。 显影装置具有布置成与图像承载部件相对的显影辊; 以及布置成与显影辊相对的磁辊。 磁性辊保持双组分显影剂以将调色剂供应到显影辊。 显影辊和磁性辊在相对位置上被相互旋转的方向旋转驱动，磁性辊的磁极和显影辊的磁极在相对位置处具有彼此不同的磁极性 。 磁辊的表面粗糙度大于显影辊的表面粗糙度。

公开(公告)号：US07742727B2

公开(公告)日：2010-06-22

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（D1）满足用于计算占空比（D1）的以下等式的关系，即使用转印方向上的电压的施加周期 调色剂从显影辊朝向感光体的正周期：7μm＆amp; NlE; T＆nlE;13μm和35％＆amp; D1; D1＆nlE; 70％。

公开(公告)号：US20080292365A1

公开(公告)日：2008-11-27

申请号：US12123553

申请日：2008-05-20

申请人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Yukihiro Mori

发明人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Yukihiro Mori

IPC分类号： G03G15/08

CPC分类号： G03G15/0808

摘要： An image forming apparatus is characterized in that an absolute value of a difference between a first coefficient of variation in a number distribution of the particle diameter of a toner carried on a developing roller and a second coefficient of variation in a number distribution of the particle diameter of a toner in a two-component developer carried on the magnetic roller is within 5% and an absolute value of a difference between a third coefficient of variation in a number distribution of the particle diameter of a toner of a toner image developed on the outer surface of an image bearing member and the second coefficient of variation is within 6%. With such an image forming apparatus, high-quality images can be stably formed over a long term.

摘要翻译： 图像形成装置的特征在于，显影辊承载的调色剂的粒径的数量分布的第一变异系数与粒径的数量分布的第二变异系数之间的差的绝对值 承载在磁性辊上的双组分显影剂中的调色剂的绝对值在5％以内，并且在外部显影的调色剂图像的调色剂的粒径的数量分布的第三变异系数之间的差异的绝对值 图像承载部件的表面和第二变异系数在6％以内。 利用这种图像形成装置，可以长期稳定地形成高质量的图像。

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：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：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。