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    Developing device and image forming apparatus provided therewith
    1.
    发明授权
    Developing device and image forming apparatus provided therewith 失效
    显影装置和图像形成装置

    公开(公告)号：US08406661B2

    公开(公告)日：2013-03-26

    申请号：US12969991

    申请日：2010-12-16

    申请人： Yoshihiro Yamagishi ,  Eiji Nimura ,  Takahisa Nakaue ,  Ikuo Makie ,  Masaki Hayashi ,  Koji Kuramashi ,  Kenichi Tamaki

    发明人： Yoshihiro Yamagishi ,  Eiji Nimura ,  Takahisa Nakaue ,  Ikuo Makie ,  Masaki Hayashi ,  Koji Kuramashi ,  Kenichi Tamaki

    IPC分类号： G03G15/09

    CPC分类号： G03G15/09 ,  G03G15/0812

    摘要： A developing device includes: a developing roller incorporating a fixed magnet body having a plurality of magnetic poles in a circumferential direction; a regulating member for regulating an amount of toner on the developing roller by means of a magnetic field formed by the regulating member and the fixed magnet body; and a magnetic-field generating member for scraping off, on an upstream of the regulating member in a rotational direction of the developing roller, toner which is not used for development on the developing roller. A relation Bm/Br>1 is satisfied, where Br represents a magnetic flux density of a distal end portion of the regulating member facing a surface of the developing roller and Bm represents a magnetic flux density of a distal end portion of the magnetic-field generating member facing the surface of the developing roller.

    摘要翻译： 显影装置包括：显影辊，其具有在周向上具有多个磁极的固定磁体; 调节构件，用于通过由限制构件和固定磁体形成的磁场来调节显影辊上的调色剂的量; 以及用于在调节构件的上游沿显影辊的旋转方向刮除在显影辊上不用于显影的调色剂的磁场产生构件。 满足关系Bm / Br> 1，其中Br表示限制构件的面向显影辊的表面的远端部分的磁通密度，Bm表示磁场的远端部分的磁通密度 面向显影辊表面的发生元件。

    DEVELOPING DEVICE AND IMAGE FORMING APPARATUS PROVIDED THEREWITH
    2.
    发明申请
    DEVELOPING DEVICE AND IMAGE FORMING APPARATUS PROVIDED THEREWITH 失效
    开发设备和图像形成设备

    公开(公告)号：US20110176840A1

    公开(公告)日：2011-07-21

    申请号：US12969991

    申请日：2010-12-16

    申请人： Yoshihiro YAMAGISHI ,  Eiji Nimura ,  Takahisa Nakaue ,  Ikuo Makie ,  Masaki Hayashi ,  Koji Kuramashi ,  Kenichi Tamaki

    发明人： Yoshihiro YAMAGISHI ,  Eiji Nimura ,  Takahisa Nakaue ,  Ikuo Makie ,  Masaki Hayashi ,  Koji Kuramashi ,  Kenichi Tamaki

    IPC分类号： G03G15/09

    CPC分类号： G03G15/09 ,  G03G15/0812

    摘要： A developing device includes: a developing roller incorporating a fixed magnet body having a plurality of magnetic poles in a circumferential direction; a regulating member for regulating an amount of toner on the developing roller by means of a magnetic field formed by the regulating member and the fixed magnet body; and a magnetic-field generating member for scraping off, on an upstream of the regulating member in a rotational direction of the developing roller, toner which is not used for development on the developing roller. A relation Bm/Br>1 is satisfied, where Br represents a magnetic flux density of a distal end portion of the regulating member facing a surface of the developing roller and Bm represents a magnetic flux density of a distal end portion of the magnetic-field generating member facing the surface of the developing roller.

    摘要翻译： 显影装置包括：显影辊，其具有在周向上具有多个磁极的固定磁体; 调节构件，用于通过由限制构件和固定磁体形成的磁场来调节显影辊上的调色剂量; 以及用于在调节构件的上游沿显影辊的旋转方向刮除在显影辊上不用于显影的调色剂的磁场产生构件。 满足关系Bm / Br> 1，其中Br表示限制构件的面向显影辊的表面的远端部分的磁通密度，Bm表示磁场的远端部分的磁通密度 面向显影辊表面的发生元件。

    Developing unit with agitation transport members
    5.
    发明授权
    Developing unit with agitation transport members 失效
    具有搅拌运输构件的开发单元

    公开(公告)号：US07493068B2

    公开(公告)日：2009-02-17

    申请号：US11380424

    申请日：2006-04-27

    申请人： Eiji Tatsumi ,  Takahisa Nakaue

    发明人： Eiji Tatsumi ,  Takahisa Nakaue

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0893 ,  G03G15/0877 ,  G03G2215/0833

    摘要： A developing unit is disclosed in which replenished toner is smoothly transported and efficiently agitated into the developing unit by an agitation transport member provided therein having a supply region formed upstream from a transport region. A first agitation transport screw installed in a developing unit includes a developer transport region to transport developer downstream thereof, and a toner supply region that is formed coaxially with the developer transport region and upstream of the developer transport region, and supplies the externally replenished toner to the developer transport region. Moreover, a gap formed between the toner supply region and a region of the housing in the toner supply region is smaller than a gap formed between the developer transport region and a region of the housing in the developer transport region.

    摘要翻译： 公开了一种显影单元，其中补充的调色剂通过设置在其中的搅拌运送构件被平稳地输送并有效地搅动到显影单元中，该搅拌运送构件具有形成在运输区域上游的供应区域。 安装在显影单元中的第一搅拌输送螺杆包括显影剂输送区域，用于将其下游的显影剂输送到与显影剂输送区域和显影剂输送区域的上游同轴形成的调色剂供给区域，并将外部补充的调色剂供给到 开发商运输区域。 此外，在调色剂供给区域和调色剂供应区域中的壳体的区域之间形成的间隙小于显影剂传送区域和显影剂传送区域中的壳体的区域之间形成的间隙。

    IMAGE FORMING APPARATUS
    6.
    发明申请
    IMAGE FORMING APPARATUS 有权
    图像形成装置

    公开(公告)号：US20080232860A1

    公开(公告)日：2008-09-25

    申请号：US12050466

    申请日：2008-03-18

    申请人： Shoichi Sakata ,  Takahisa Nakaue ,  Kiyotaka Kobayashi ,  Yukihiro Mori

    发明人： Shoichi Sakata ,  Takahisa Nakaue ,  Kiyotaka Kobayashi ,  Yukihiro Mori

    IPC分类号： G03G15/09

    CPC分类号： G03G15/0907

    摘要： An image forming apparatus is provided with a photoconductive member on which a latent image is to be formed, a developing roller for developing the latent image formed on the photoconductive member by a first bias, and a magnetic roller for forming a magnetic brush thereon with a two-component developer and forming a thin toner layer on the developing roller by a second bias. If (D1) denotes the duty ratio of a first alternating-current bias included in the first bias and (D2) denotes the duty ratio of a second alternating-current bias included in the second bias, the duty ratios (D1, D2) satisfy the following relationship: D1>100−D2.

    摘要翻译： 图像形成装置设置有要在其上形成潜像的感光体，用于通过第一偏压将形成在感光体上的潜像显影的显影辊和用于在其上形成磁刷的磁辊， 双组分显影剂并通过第二偏压在显影辊上形成薄的调色剂层。 如果（D 1）表示包括在第一偏压中的第一交流偏压的占空比，（D 2）表示包括在第二偏压中的第二交流偏压的占空比，占空比（D 1， D 2）满足以下关系：<？in-line-formula description =“In-line Formulas”end =“lead”？> D1> 100-D2。 <？in-line-formula description =“In-line Formulas”end =“tail”？>

    Image-forming machine capable of opening to permit ready access to internal components
    8.
    发明授权
    Image-forming machine capable of opening to permit ready access to internal components 失效
    图像形成机能够打开以便准备进入内部部件

    公开(公告)号：US5897244A

    公开(公告)日：1999-04-27

    申请号：US971622

    申请日：1997-11-17

    申请人： Masahiko Miyazaki ,  Yoshifumi Okauchi ,  Naoyuki Ishida ,  Yukihiro Ito ,  Tetsuya Ichigotani ,  Shoji Hirano ,  Takahisa Nakaue

    发明人： Masahiko Miyazaki ,  Yoshifumi Okauchi ,  Naoyuki Ishida ,  Yukihiro Ito ,  Tetsuya Ichigotani ,  Shoji Hirano ,  Takahisa Nakaue

    IPC分类号： B65H3/06 ,  B65H9/06 ,  G03G15/00

    CPC分类号： B65H9/006 ,  B65H3/0638 ,  B65H3/50 ,  G03G15/6564 ,  B65H2404/1112 ,  G03G2215/00544 ,  G03G2215/00721

    摘要： An image-forming machine has a sheet member conveying passage extending through a transfer zone and a fixing zone, a sheet member-feeder for feeding a sheet member to the sheet member conveying passage, and a sheet member conveyor for conveying the sheet member through the sheet member conveying passage. A housing of the image-forming machine has a lower surface defined by an intermediate lower wall and an upper surface defined by an intermediate upper wall, and has a space of which the front surface is opened. The downstream end portion of the sheet member conveying passage extends along one side portion of the intermediate lower wall on the lower side thereof. That one side portion of the intermediate lower wall is defined by an opening/closing member which is brought to the open position to open the downstream end portion of the sheet member conveying passage. The sheet member conveyer includes a pair of register rollers. After the leading edge of the sheet member delivered to the sheet member conveying passage is brought into contact with the nip of the pair of register rollers, the pair of register rollers are preliminarily rotated for only a predetermined period of time.

    摘要翻译： 图像形成机具有延伸通过转印区域和固定区域的片材输送通道，用于将片材元件供给到片材输送通道的片材供给器，以及片材输送机，用于通过该片材输送通道 片材输送通道。 图像形成机的壳体具有由中间下壁和由中间上壁限定的上表面限定的下表面，并且具有其前表面打开的空间。 片材输送通道的下游端部分在下侧的中间下壁的一侧部分延伸。 中间下壁的一侧部分由打开/关闭构件限定，打开/关闭构件打开片材构件输送通道的下游端部。 片材输送机包括一对定位辊。 在输送到片材输送通道的片状构件的前缘与一对对准辊的辊隙接触之后，一对对准辊预先旋转预定的时间。

    Device for developing electrostatic latent image which prevents solidification of developing agent by vibration
    9.
    发明授权
    Device for developing electrostatic latent image which prevents solidification of developing agent by vibration 失效
    用于显影静电潜像的装置，其防止显影剂通过振动而固化

    公开(公告)号：US5729803A

    公开(公告)日：1998-03-17

    申请号：US734856

    申请日：1996-10-23

    申请人： Takahisa Nakaue ,  Masanobu Maeshima ,  Akinobu Nakahata ,  Takeshi Aoki ,  Hiroshi Inui

    发明人： Takahisa Nakaue ,  Masanobu Maeshima ,  Akinobu Nakahata ,  Takeshi Aoki ,  Hiroshi Inui

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0822 ,  Y10S222/01

    摘要： A device for developing an electrostatic latent image including a developing housing having a developing chamber, a stirrer chamber, and a developing agent-feeding port communicating with the stirrer chamber. A developing roller is disposed in the developing chamber to hold, on the peripheral surface thereof, a developing agent in a developing agent-holding zone, and convey the thus held developing agent to a developing zone to apply it to the electrostatic latent image. A replenishing device feeds the developing agent onto the peripheral surface of the developing roller in the developing agent-holding zone. A stirring device disposed in the stirrer chamber stirs the developing agent that is fed through the developing agent-feeding port and sends the stirred developing agent to the developing chamber. A vibration plate having a plurality of developing agent-flow ports is disposed at the developing agent-feeding port of the developing housing, and the stirring device is caused to act on the vibration plate.

    摘要翻译： 一种用于显影静电潜像的装置，包括具有显影室，搅拌室和与搅拌器室连通的显影剂供给口的显影室。 显影辊设置在显影室中，以将显影剂保持在显影剂保持区的外周表面上，并将这样保持的显影剂输送到显影区域以将其施加到静电潜像上。 补充装置将显影剂供给到显影剂保持区中的显影辊的外周表面上。 设置在搅拌器室中的搅拌装置搅拌通过显影剂供给口供给的显影剂，并将搅拌的显影剂送到显影室。 具有多个显影剂流动端口的振动板设置在显影室的显影剂供给口处，并且使搅拌装置作用在振动板上。

    Developing unit and image forming apparatus
    10.
    发明授权
    Developing unit and image forming apparatus 有权
    显影单元和成像设备

    公开(公告)号：US08014690B2

    公开(公告)日：2011-09-06

    申请号：US12042684

    申请日：2008-03-05

    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： G03G15/06

    CPC分类号： G03G15/065

    摘要： A developing unit has a voltage-applicator (80) to apply a developing bias voltage to a developing roller (72). The voltage-applicator (80) applies the developing bias voltage for a first duration to apply an AC voltage having a rectangular waveform, and a second duration to stop applying the AC voltage. The AC voltage has a duty ratio of 50% or more in a direction for causing toner to develop an electrostatic latent image. The number of cycles of the AC voltage in the first duration is two or more, and the AC voltage has a voltage in a direction for pulling the toner back to the developing roller, just before transition to the second duration. The developing unit suppresses occurrence of image unevenness due to a fluctuation in developing gap. Thus, an image forming apparatus equipped with the developing unit forms a high-quality image while suppressing image unevenness.

    摘要翻译： 显影单元具有向显影辊（72）施加显影偏压的电压施加器（80）。 电压施加器（80）施加显影偏压第一持续时间以施加具有矩形波形的交流电压和第二持续时间以停止施加AC电压。 AC电压在使调色剂显影静电潜像的方向上具有50％以上的占空比。 在第一持续时间内的交流电压的周期数为两个或更多个，并且在转换到第二持续时间之前，AC电压具有用于将调色剂拖回显影辊的方向上的电压。 显影单元抑制由于显影间隙的波动引起的图像不均匀的发生。 因此，配备有显影单元的图像形成装置在抑制图像不均匀的同时形成高质量图像。