公开(公告)号：US5923933A

公开(公告)日：1999-07-13

申请号：US23462

申请日：1998-02-13

申请人： Masayasu Anzai ,  Tsuneaki Kawanishi ,  Yoshitaka Fujinuma ,  Hiroyoshi Matsumoto ,  Yasuo Takuma ,  Hisao Okada ,  Masayuki Ainoya ,  Takashi Suzuki ,  Yuichiro Suzuki ,  Tomonari Hokkyo ,  Koji Kato ,  Katsuya Kawai ,  Tsutomu Nakagawa

发明人： Masayasu Anzai ,  Tsuneaki Kawanishi ,  Yoshitaka Fujinuma ,  Hiroyoshi Matsumoto ,  Yasuo Takuma ,  Hisao Okada ,  Masayuki Ainoya ,  Takashi Suzuki ,  Yuichiro Suzuki ,  Tomonari Hokkyo ,  Koji Kato ,  Katsuya Kawai ,  Tsutomu Nakagawa

IPC分类号： G03G15/09

CPC分类号： G03G15/09 ,  G03G2215/0609 ,  G03G2215/0648

摘要： A uniform image is obtained by matching the sliding friction force, the moving speed and the developing agent in a developing region of two developing rollers and an electric characteristic of a photosensitive body used for image development. Two developing rollers rotating in directions opposite to each other are used, the moving direction of the first developing roller being opposite to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the first developing roller to a circumferential speed of the photosensitive body is within a rage of 0.5 to 2.5; and the moving direction of the second developing roller is equal to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the second developing roller to a circumferential speed of the photosensitive body is within a range of 1.5 to 3.5. A ratio of the sliding friction force between a magnetic brush for developing agent and the photosensitive body formed in the first developing roller and the sliding friction force between a magnetic brush for developing agent and the photosensitive body formed in the second developing roller is within a range of 0.9 to 2.1.

摘要翻译： 通过匹配两个显影辊的显影区域中的滑动摩擦力，移动速度和显影剂以及用于图像显影的感光体的电特性来获得均匀的图像。 使用沿彼此相反的方向旋转的两个显影辊，第一显影辊的移动方向与感光体的移动方向相反，并且第一显影辊的圆周速度与圆周速度的圆周速度比 的感光体在0.5〜2.5的范围内; 并且第二显影辊的移动方向等于感光体的移动方向，并且第二显影辊的圆周速度与感光体的圆周速度的圆周速度比在1.5至3.5的范围内 。 用于显影剂的磁刷和形成在第一显影辊中的感光体之间的滑动摩擦力与显影剂用磁刷与形成在第二显影辊中的感光体之间的滑动摩擦力之间的滑动摩擦力的比率在一定范围内 为0.9至2.1。

公开(公告)号：US5907755A

公开(公告)日：1999-05-25

申请号：US73768

申请日：1998-05-07

申请人： Yasuo Takuma ,  Yoshitaka Fujinuma ,  Masayasu Anzai ,  Hisao Okada

发明人： Yasuo Takuma ,  Yoshitaka Fujinuma ,  Masayasu Anzai ,  Hisao Okada

IPC分类号： G03G15/08 ,  G03G13/08 ,  G03G13/09

CPC分类号： G03G13/08 ,  G03G13/09 ,  G03G2215/0648

摘要： A predetermined mathematical formula, which defines an occurrence degree of an image defect where the toner layer is thinned or no toner image is formed, is set up, which is valid for a developing device including a reverse turn developer carrier and a forward turn developer carrier. A difference between the total sum A of the values by the above formula showing the occurrence degree of the image defect on the forward turn developing roller and the total sum B of the values by the above formula showing the occurrence degree on the reverse turn developing roller, i.e., (A-B), is selected within a range of -0.56 to +0.5.

摘要翻译： 确定限定了调色剂层变薄或不形成调色剂图像的图像缺陷的发生程度的预定数学公式，其对于包括反转显影剂载体和正向转动显影剂载体的显影装置是有效的 。 表示前转显影辊上的图像缺陷的发生程度的上述公式的总和A与通过上述公式的值的总和B之间的差值表示反转显影辊的发生程度 ，即（AB）在-0.56至+0.5的范围内选择。

公开(公告)号：US06330414B1

公开(公告)日：2001-12-11

申请号：US09409079

申请日：1999-09-30

申请人： Yasuo Takuma ,  Yoshitaka Fujinuma ,  Tomonari Hokkyou ,  Masayasu Anzai ,  Koji Kato

发明人： Yasuo Takuma ,  Yoshitaka Fujinuma ,  Tomonari Hokkyou ,  Masayasu Anzai ,  Koji Kato

IPC分类号： G03G1508

CPC分类号： G03G15/09 ,  G03G2215/0648

摘要： In a developing system containing a combination of forward-rotating and a backward-rotating developing rollers, a steady quantity of developing agent should be supplied to the developing rollers for high-quality printed images. This requirement can be satisfied by placing a doctor blade between an intersection point, where a line connecting the central axis of one of the developing rollers and its polarity reversing position meets a line connecting the central axis of the other of the developing rollers and its polarity reversing position, and the developing roller pair. Further, the doctor blade should be located on the upstream side of the developing agent flow relative to the central axes of the backward-rotating developing roller and the forward rotating developing roller with its rightmost side (upstream side) in parallel with the line connecting the central axes of the developing rollers, and the doctor gap (on the side of the developing roller to which the developing agent is supplied) should be greater than a minimum gap (doctor gap) between one end of the doctor blade and the surface of the developing roller to which the developing agent is first supplied.

摘要翻译： 在包含正向旋转和向后旋转的显影辊的组合的显影系统中，应将稳定量的显影剂供应到显影辊以获得高质量的印刷图像。 这种要求可以通过将刮刀放置在交叉点之间，其中连接显影辊中的一个的中心轴线和其极性反转位置的线与连接另一个显影辊的中心轴的线和其极性 反转位置和显影辊对。 此外，刮刀应当位于显影剂流的上游侧，相对于反转显影辊和向前旋转的显影辊的中心轴线，其最右侧（上游侧）与连接 显影辊的中心轴线和刮刀间隙（在显影剂供应的显影辊侧）应大于刮刀的一端与刮刀的表面之间的最小间隙（刮刀间隙） 首先提供显影剂的显影辊。

公开(公告)号：US5600405A

公开(公告)日：1997-02-04

申请号：US257296

申请日：1994-06-09

申请人： Takao Umeda ,  Katsuya Kawai ,  Yosuke Saito ,  Hiroyuki Mabuchi ,  Masayasu Anzai ,  Masato Miwa ,  Takashi Suzuki ,  Teruaki Mitsuya ,  Yasuo Takuma

发明人： Takao Umeda ,  Katsuya Kawai ,  Yosuke Saito ,  Hiroyuki Mabuchi ,  Masayasu Anzai ,  Masato Miwa ,  Takashi Suzuki ,  Teruaki Mitsuya ,  Yasuo Takuma

IPC分类号： G03G15/00 ,  G03G15/16 ,  G03G21/00 ,  G03G21/10

CPC分类号： G03G15/161 ,  G03G15/166 ,  G03G2215/1657 ,  G03G2215/1661

摘要： A bias cleaning system has an electrically conductive brush roller for collecting toner which has to adhered a transfer belt by scrubbing the toner off the transfer belt under a condition in which a direct current voltage of the opposite polarity to the charge of the toner is applied to the brush roller. A corona charger is also provided for decreasing the amount of charge on the toner on the transfer belt in a region of the belt up-stream of the electrically conductive brush roller in the moving direction of the transfer belt.

摘要翻译： 偏置清洁系统具有用于收集调色剂的导电刷辊，该调色剂必须在将与调色剂电荷相反极性的直流电压施加到其上的条件下通过将调色剂从转印带上除去而粘附转印带 刷辊。 还提供电晕充电器，用于减小导电刷辊沿转印带移动方向的带上游区域中转印带上的调色剂上的电荷量。

公开(公告)号：US06487384B2

公开(公告)日：2002-11-26

申请号：US09826943

申请日：2001-04-06

申请人： Hisao Okada ,  Hiroyuki Mabuchi ,  Teruaki Mitsuya ,  Shinya Kobayashi ,  Yasuo Takuma ,  Masayoshi Ishii ,  Hisayoshi Kato

发明人： Hisao Okada ,  Hiroyuki Mabuchi ,  Teruaki Mitsuya ,  Shinya Kobayashi ,  Yasuo Takuma ,  Masayoshi Ishii ,  Hisayoshi Kato

IPC分类号： G03G1509

CPC分类号： G03G13/013 ,  G03G2215/0174 ,  G03G2215/0495

摘要： In an image forming apparatus for charging a photosensitive body, changing the light exposure amount in at least three levels at exposure to light, thereby forming an electrostatic image made up of a high-potential part, a low-potential part, and an intermediate-potential part therebetween on the photosensitive body, and normally developing and inversely developing the electrostatic image using toners different in charge polarity for forming two types of toner images on the photosensitive body, a first developer used with a first toner image developing unit has electric resistance changed within 10% in the change range of applied voltage to the developer as the difference between a surface potential of the photosensitive body and a developing bias voltage.

摘要翻译： 在用于对感光体充电的图像形成装置中，在曝光时将曝光量改变为至少三个等级，从而形成由高电位部分，低电位部分和中间电极部分构成的静电图像， 在感光体上的潜在部分，并且使用不同于电荷极性的调色剂正常显影和反相显影静电图像，以在感光体上形成两种类型的调色剂图像，与第一调色剂图像显影单元一起使用的第一显影剂具有电阻改变 在作为感光体的表面电位与显影偏压之间的差异的显影剂的施加电压的变化范围内的10％以内。

公开(公告)号：US20120051792A1

公开(公告)日：2012-03-01

申请号：US13137522

申请日：2011-08-24

申请人： Junichi Matsumoto ,  Tomoya Ohmura ,  Yasuo Takuma ,  Hiroshi Kikuchi ,  Natsumi Matsue

发明人： Junichi Matsumoto ,  Tomoya Ohmura ,  Yasuo Takuma ,  Hiroshi Kikuchi ,  Natsumi Matsue

IPC分类号： G03G15/08 ,  G03G15/09

CPC分类号： G03G15/09 ,  G03G15/0877 ,  G03G15/0891 ,  G03G15/0893

摘要： A developing device in the embodiment includes: a developer carrier that carries a two-component developer, moves the surface, and supplies the toner to a latent image on a surface of a latent image carrier; a first conveying member that conveys the developer in a first conveying path; a second conveying member that conveys the developer in a second conveying path; and a developer passing unit that conveys upward the developer which has reached at a conveying-direction posterior end of the second conveying path and passes the developer to the first conveying path. The developer passing unit includes a plurality of pushing members that push up the developer. The developer can pass through from upper surfaces of the pushing members to lower surfaces of the pushing members.

摘要翻译： 本实施例中的显影装置包括：承载双组分显影剂的显影剂载体，使表面移动，并将调色剂供应到潜像载体的表面上的潜像; 在第一传送路径中传送显影剂的第一传送部件; 第二输送构件，其在第二输送路径中输送显影剂; 以及显影剂通过单元，其向上传送已经到达第二输送路径的输送方向后端的显影剂，并将显影剂通过到第一输送路径。 显影剂通过单元包括向上推动显影剂的多个推压构件。 显影剂可以从推动构件的上表面穿过推动构件的下表面。

公开(公告)号：US20110182610A1

公开(公告)日：2011-07-28

申请号：US13010264

申请日：2011-01-20

申请人： Tomoya OHMURA ,  Yasuo Takuma ,  Junichi Matsumoto ,  Hiroshi Kikuchi ,  Natsumi Katoh

发明人： Tomoya OHMURA ,  Yasuo Takuma ,  Junichi Matsumoto ,  Hiroshi Kikuchi ,  Natsumi Katoh

IPC分类号： G03G21/20 ,  G03G15/08

CPC分类号： G03G21/206 ,  G03G15/0848 ,  G03G15/0879 ,  G03G15/0887

摘要： A development device includes a developing section to visualize a latent image formed on a latent image carrier with developer including toner and carrier. The development device has a developer supply opening and a developer collection opening, a circulation unit to transport the developer collected from the developer collection opening of the developing section to the developer supply opening of the developing section and including a developer container to store the developer collected from the developing section disposed upstream from the development section in a direction in which the developer is circulated, and a developer cooler to cool the developer contained in the developer container.

摘要翻译： 显影装置包括显影部分，用于使具有调色剂和载体的显影剂在潜像载体上形成的潜像可视化。 显影装置具有显影剂供应开口和显影剂收集开口，循环单元，用于将从显影部分的显影剂收集开口收集的显影剂输送到显影部分的显影剂供应开口，并且包括显影剂容器以将收集的显影剂 从显影部分设置在显影剂循环方向上游的显影部分和显影剂冷却器以冷却包含在显影剂容器中的显影剂。

公开(公告)号：US07493063B2

公开(公告)日：2009-02-17

申请号：US11461167

申请日：2006-07-31

申请人： Yasuo Takuma ,  Masashi Yamamoto ,  Masanari Fujita

发明人： Yasuo Takuma ,  Masashi Yamamoto ,  Masanari Fujita

IPC分类号： G03G15/02 ,  G03G21/18

CPC分类号： G03G15/0216 ,  G03G2215/021

摘要： An image-forming device including a plurality of supporting rollers, a photosensitive belt, a pressing roller, an intermediate roller, and a charging roller. The plurality of supporting rollers includes a preselected supporting roller. The photosensitive belt is circularly movably supported on the plurality of supporting rollers. The pressing roller is disposed to contact the photosensitive belt and to press the preselected supporting roller through the photosensitive belt. The intermediate roller is disposed away from the photosensitive belt and to contact the pressing roller. The intermediate roller is rotatable following rotation of the pressing roller. The charging roller is disposed to contact both the photosensitive belt and the intermediate roller and to press the preselected supporting roller through the photosensitive belt. The charging roller is rotatable following rotation of the intermediate roller to thereby charge the photosensitive belt.

摘要翻译： 一种图像形成装置，包括多个支撑辊，感光带，加压辊，中间辊和充电辊。 多个支撑辊包括预选的支撑辊。 感光带可循环移动地支撑在多个支撑辊上。 压辊设置成与感光带接触并且通过感光带按压预选的支撑辊。 中间辊远离感光带设置并接触压辊。 中间辊可以在按压辊的旋转之后旋转。 充电辊设置成接触感光带和中间辊两者，并且通过感光带按压预选的支撑辊。 充电辊在中间辊旋转之后可旋转，从而对感光带充电。

公开(公告)号：US07463849B2

公开(公告)日：2008-12-09

申请号：US11337463

申请日：2006-01-24

申请人： Yasuo Takuma ,  Masashi Yamamoto ,  Masanari Fujita

发明人： Yasuo Takuma ,  Masashi Yamamoto ,  Masanari Fujita

IPC分类号： G03G21/00

CPC分类号： G03G21/08

摘要： An image forming apparatus includes a photosensitive member being movable in a predetermined direction; a charging roller that charges a surface of the photosensitive member; and a static pre-eliminator that eliminates static electricity by irradiating the surface of the photosensitive member with light, the static pre-eliminator located on an upstream side of the charging roller in a direction of movement of the photosensitive member; wherein an arrangement and an exposure amount of the static pre-eliminator are set to satisfy E ≦0.025×exp(t/τ) where τis a residual time constant of a photo carrier generated in the photosensitive member by the static pre-eliminator, t is a time period from a time when the photosensitive member passes through the static pre-eliminator to a time when the photosensitive member is charged by the charging roller, and E is a normalized exposure amount of the static pre-eliminator.

摘要翻译： 图像形成装置包括可沿预定方向移动的感光构件; 充电辊，其对感光构件的表面充电; 以及静电预除器，其通过用光照射感光构件的表面来消除静电，静电预除器位于充电辊的上游侧，沿着感光构件的移动方向; 其中静态预除器的布置和曝光量被设置为满足E <= 0.025×exp（t /τ），其中tau是通过静态预除器在感光构件中产生的光载体的残余时间常数，t 是从感光构件通过静电预除器到感光构件由充电辊充电的时间的时间段，E是静态预除器的归一化曝光量。

公开(公告)号：US5373351A

公开(公告)日：1994-12-13

申请号：US917709

申请日：1992-07-16

申请人： Takao Umeda ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

发明人： Takao Umeda ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

IPC分类号： G03G15/00 ,  G03G15/08 ,  G03G15/16 ,  G03G21/00

CPC分类号： G03G15/5037 ,  G03G15/08 ,  G03G15/1655 ,  G03G15/5033

摘要： A parallel circuit of a capacitor and a varistor is connected between a ground and an aluminum cap of a photosensitive drum having a photoconductor sheet wound on a surface of an aluminum drum. The capacitor is charged by a charger. A developer roll connected to a bias voltage supply is provided with a retraction mechanism and is controlled so that the developer roll is separated from the drum mechanically upon start of operation of a recording apparatus until a potential of the cap is increased to a predetermined value and a developing agent layer does not come into contact with the cap. Alternatively to retraction of the developing roll, the developing roll may be stopped to control a height of bristle of developing agent or a bias voltage of the developer may be reversed.

摘要翻译： 电容器和变阻器的并联电路连接在具有缠绕在铝鼓的表面上的感光鼓的感光鼓的接地和铝盖之间。 电容器由充电器充电。 连接到偏置电压源的显影辊具有退回机构，并被控制，使得显影辊在记录装置的操作开始时机械地与鼓分离直到盖的电位增加到预定值，并且 显影剂层不与盖接触。 替代显影辊的缩回，可以停止显影辊以控制显影剂的刷毛的高度，或显影剂的偏压可以颠倒。