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    Magnetic particles for charging means, and electrophotographic apparatus, process cartridge and image forming method including same
    1.
    发明授权
    Magnetic particles for charging means, and electrophotographic apparatus, process cartridge and image forming method including same 失效
    用于充电装置的磁性颗粒和电子照相设备，处理盒和包括其的成像方法

    公开(公告)号：US06548218B1

    公开(公告)日：2003-04-15

    申请号：US08492445

    申请日：1995-06-19

    申请人： Tsutomu Kukimoto ,  Kenji Okado ,  Shuichi Aita ,  Tsuyoshi Takiguchi

    发明人： Tsutomu Kukimoto ,  Kenji Okado ,  Shuichi Aita ,  Tsuyoshi Takiguchi

    IPC分类号： G03G1302

    CPC分类号： G03G15/0241 ,  G03G2215/022 ,  G03G2221/183 ,  Y10S430/102

    摘要： Magnetic particles for charging means disposed in contact with an electrophotographic photosensitive member for charging the electrophotographic photosensitive member based on a voltage applied thereto are provided as particles of a ferrite component represented by the following formula (1): (Fe2O3)X(A)Y(B)Z  (1), wherein A denotes at least one metal oxide component selected from the group consisting of Li2O, MnO and MgO, B denotes at least one metal oxide component different from A; X, Y and Z denote numbers representing mol ratios and satisfying the following conditions: 0.2

    摘要翻译： 作为与电子照相感光构件相接触的用于充电电子照相感光构件的用于充电装置的磁性颗粒被提供为由下式（1）表示的铁氧体组分的颗粒：其中A表示至少一种金属氧化物 选自Li2O，MnO和MgO的组分，B表示与A不同的至少一种金属氧化物组分; X，Y和Z表示摩尔比的数字，满足下列条件：0.2

    Charging apparatus and electrophotographic apparatus
    4.
    发明授权
    Charging apparatus and electrophotographic apparatus 失效
    充电设备和电子照相设备

    公开(公告)号：US5724632A

    公开(公告)日：1998-03-03

    申请号：US767802

    申请日：1996-12-17

    申请人： Fumihiro Arahira ,  Shuichi Aita ,  Tsutomu Kukimoto ,  Kiyoshi Mizoe ,  Yoshifumi Hano

    发明人： Fumihiro Arahira ,  Shuichi Aita ,  Tsutomu Kukimoto ,  Kiyoshi Mizoe ,  Yoshifumi Hano

    IPC分类号： G03G15/02

    CPC分类号： G03G15/0241 ,  G03G2215/022

    摘要： A charging apparatus or an electrophotographic apparatus includes an electrophotographic photosensitive member including a photosensitive layer provided on a conductive supporting member, and a charging member including magnetic particles, disposed to be in contact with the electrophotographic photosensitive member, for charging the electrophotographic photosensitive member when a voltage is applied to the charging member. The layer of the electrophotographic photosensitive member most separated from the conductive supporting member has a volume resistivity between 10.sup.8 .OMEGA..cm and 10.sup.15 .OMEGA..cm, and the magnetic particles have a hygroscopic property such that the ratio H/L of the maximum value H to the minimum value L of the amount of water contained within the particles is at least 1 and less than 4.

    摘要翻译： 充电装置或电子照相装置包括电子照相感光构件，其包括设置在导电支撑构件上的感光层，以及包含磁性颗粒的充电构件，设置为与电子照相感光构件接触，用于在电子照相感光构件充电时 向充电部件施加电压。 与导电支撑构件最分离的电子照相感光构件的层的体积电阻率为108欧姆·厘米到1015欧姆·厘米，磁性颗粒具有吸湿性，使得最大值H / 包含在颗粒内的水的量的最小值L至少为1且小于4。

    Image forming method
    6.
    发明授权
    Image forming method 失效
    图像形成方法

    公开(公告)号：US5576810A

    公开(公告)日：1996-11-19

    申请号：US536843

    申请日：1995-09-29

    申请人： Shuichi Aita ,  Toshiyuki Yoshihara ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Yoshifumi Hano ,  Yuki Nishio

    发明人： Shuichi Aita ,  Toshiyuki Yoshihara ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Yoshifumi Hano ,  Yuki Nishio

    IPC分类号： G03G15/32 ,  G03G21/00 ,  G03G15/04

    CPC分类号： G03G15/326 ,  G03G15/04045 ,  G03G21/0064 ,  G03G2221/0005

    摘要： An electrophotographic image forming method including a toner image transfer step and eliminating an independent step for cleaning transfer residual toner is operated without causing ghost images and with good gradation and dot reproducibilities. In the method, the photosensitive member is exposed at an exposure intensity which is at least a minimum exposure intensity and below a maximum exposure intensity. The minimum exposure intensity is determined on a surface potential-exposure intensity characteristic curve of the photosensitive member by determining a first slope S1 of a straight line connecting a point giving a dark part potential Vd and a point giving a value of (Vd+ a residual potential Vr)/2, determining a contact point between a tangent line having a slope of S1/20 and the surface potential-exposure intensity characteristic curve and determining the minimum exposure intensity as an exposure intensity at the contact point. The maximum exposure intensity is determined as 5 times a half-attenuation exposure intensity.

    摘要翻译： 包括调色剂图像转印步骤和消除用于清洁转印残余调色剂的独立步骤的电子照相图像形成方法被操作而不引起重影并具有良好的灰度和点重现性。 在该方法中，感光构件以至少最小曝光强度并低于最大曝光强度的曝光强度曝光。 通过确定连接提供暗部电位Vd的点的直线的第一斜率S1和给出（Vd + a残留电位）的点，确定感光构件的表面电位 - 曝光强度特性曲线上的最小曝光强度 Vr）/ 2，确定具有S1 / 20的斜率的切线与表面电位 - 曝光强度特性曲线之间的接触点，并确定最小曝光强度作为接触点处的曝光强度。 最大曝光强度被确定为半衰减曝光强度的5倍。

    Electrophotographic apparatus using photoconductive member chargeable with magnetic brush
    7.
    发明授权
    Electrophotographic apparatus using photoconductive member chargeable with magnetic brush 失效
    使用可用磁刷充电的感光体的电子照相设备

    公开(公告)号：US5890037A

    公开(公告)日：1999-03-30

    申请号：US491703

    申请日：1995-06-19

    申请人： Tsutomu Kukimoto ,  Akio Maruyama ,  Shuichi Aita ,  Yoshifumi Hano

    发明人： Tsutomu Kukimoto ,  Akio Maruyama ,  Shuichi Aita ,  Yoshifumi Hano

    IPC分类号： G03G15/02

    CPC分类号： G03G15/0241 ,  G03G2215/022 ,  G03G2221/183

    摘要： An electrophotographic apparatus is constituted by an electrophotographic photosensitive member, and a charger, imagewise exposing light and a developer disposed in this order opposite to the photosensitive member. The photosensitive member has a surface layer which is a charge-injection layer. The charger includes a charging member formed of magnetic particles and disposed contactable to the photosensitive member so as to charge the photosensitive member to at least 80% of a DC voltage supplied to the charging member. The magnetic particles have a volume resistivity in the range of 1.times.10.sup.4 -1.times.10.sup.9 ohm.cm, and the magnetic particles have a surface layer having a volume resistivity of at most 1.times.10.sup.9 ohm.cm.

    摘要翻译： 电摄影装置由电子照相感光构件和充电器，成像曝光光和以与感光构件相反的顺序设置的显影剂构成。 感光构件具有作为电荷注入层的表面层。 充电器包括由磁性颗粒形成的充电构件，并且设置成与感光构件接触，以将感光构件充电至提供给充电构件的直流电压的至少80％。 磁性颗粒的体积电阻率在1×104-1×109欧姆·厘米的范围内，并且磁性颗粒具有体积电阻率至多为1×10 9欧姆·厘米的表面层。

    Image forming apparatus
    8.
    发明授权
    Image forming apparatus 失效
    图像形成装置

    公开(公告)号：US5751405A

    公开(公告)日：1998-05-12

    申请号：US559094

    申请日：1995-11-16

    申请人： Shuichi Aita ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Yoshifumi Hano

    发明人： Shuichi Aita ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Yoshifumi Hano

    IPC分类号： G03G15/02 ,  G03G15/06 ,  G03G15/08 ,  G03G21/00 ,  G03G21/06 ,  G03G15/24

    CPC分类号： G03G21/0064 ,  G03G21/0005 ,  G03G2221/0005

    摘要： An image forming apparatus includes an image bearing member; developing-cleaning member for cleaning the image bearing member by removing residual toner from the image bearing member simultaneously with formation of a toner image by developing an electrostatic latent image formed on the image bearing member with toner having a charging polarity opposite from a charge polarity of the electrostatic latent image; transfer member for transferring the toner image from the image bearing member to a transfer material; and charging member for charging the toner remaining on the image bearing member after image transfer by the transfer member and before development by the developing-cleaning member to a polarity which is the same as the charging polarity of the toner image, and for charging the image bearing member to a polarity which is opposite from the charging polarity of the toner image.

    摘要翻译： 图像形成装置包括：图像承载部件; 显影清洁部件，用于通过用形成在图像承载部件上的静电潜像来形成调色剂图像同时从图像承载部件除去残留调色剂来清洁图像承载部件，该调色剂具有与充电极性相反的带电极性的调色剂 静电潜像; 转印部件，用于将调色剂图像从图像承载部件转印到转印材料上; 以及充电部件，用于在通过转印部件进行图像转印之后对残留在图像承载部件上的调色剂进行充电，并且在显影清洁部件显影之前，使其与与调色剂图像的充电极性相同的极性充电， 承载构件的极性与调色剂图像的充电极性相反。

    Image forming method utilizing toner having inorganic particles and particles of a specific sphericity
    9.
    发明授权
    Image forming method utilizing toner having inorganic particles and particles of a specific sphericity 失效
    利用具有无机颗粒和特定球形度的颗粒的调色剂的成像方法

    公开(公告)号：US5915150A

    公开(公告)日：1999-06-22

    申请号：US803506

    申请日：1997-02-20

    申请人： Tsutomu Kukimoto ,  Motoo Urawa ,  Shuichi Aita ,  Satoshi Yoshida

    发明人： Tsutomu Kukimoto ,  Motoo Urawa ,  Shuichi Aita ,  Satoshi Yoshida

    IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/08 ,  G03G21/00 ,  G03G15/30

    CPC分类号： G03G13/08 ,  G03G21/0064 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/097 ,  G03G2215/0617 ,  G03G2215/1614 ,  G03G2221/0005 ,  G03G9/0825

    摘要： An electrophotographic image forming method according to (I) a so-called simultaneous development and cleaning scheme or cleaner-less scheme is effectively operated by using a specific non-magnetic toner. (II) The non-magnetic toner comprises non-magnetic toner particles having a shape factor SF-1 of 120-160, a shape factor SF-2 of 115-140 and a weight-average particle size of 4-9 .mu.m. (III) The non-magnetic toner further includes inorganic fine particles (a) having a number-average primary particle size of at most 50 nm and spherical fine particles (b) having a number-average primary particle size of 50-1000 nm and a surface area-based sphericity .psi. of 0.91-1.00, respectively externally added to the non-magnetic toner particles.

    摘要翻译： 通过使用特定的非磁性调色剂有效地操作根据（I）所谓的同时显影和清洁方案或无清洁方案的电摄影图像形成方法。 （II）非磁性调色剂包括形状因子SF-1为120-160，形状因子SF-2为115-140，重均粒径为4-9μm的非磁性调色剂颗粒。 （III）非磁性调色剂还包括数均一次粒径为50nm以下的无机微粒（a）和数均一次粒径为50〜1000nm的球状微粒（b）， 分别外部添加到非磁性调色剂颗粒上的基于表面积的球形度psi为0.91-1.00。

    Image forming method and image forming apparatus
    10.
    发明授权
    Image forming method and image forming apparatus 失效
    图像形成方法和图像形成装置

    公开(公告)号：US5731122A

    公开(公告)日：1998-03-24

    申请号：US555341

    申请日：1995-11-08

    申请人： Satoshi Yoshida ,  Motoo Urawa ,  Shuichi Aita ,  Tsutomu Kukimoto ,  Yoshifumi Hano ,  Yuki Nishio

    发明人： Satoshi Yoshida ,  Motoo Urawa ,  Shuichi Aita ,  Tsutomu Kukimoto ,  Yoshifumi Hano ,  Yuki Nishio

    IPC分类号： G03G5/05 ,  G03G5/147 ,  G03G9/08 ,  G03G21/00 ,  G03G13/16

    CPC分类号： G03G5/14726 ,  G03G21/0064 ,  G03G5/0503 ,  G03G5/0539 ,  G03G9/0819 ,  G03G2221/0005

    摘要： An image forming method and image forming apparatus for charging a photosensitive member, exposing the charged photosensitive member thereby forming an electrostatic latent image, carrying toner with a toner carrying member to bring the toner into contact with the photosensitive member surface, thereby developing the electrostatic latent image and forming a toner image upon the photosensitive member, transferring the toner image that is on the photosensitive member to transfer material such as paper, and conducting a simultaneous developing-cleaning process which recovers residual toner remaining on the photosensitive member following the transfer process, so that toner consumption is greatly reduced and high image quality is maintained at the same time. The angle of contact of the photosensitive member surface to water is 85.degree. or greater, the toner is comprised of at least toner particles possessing binder resin and coloring agent, and an inorganic fine powder, and the toner has an average particle diameter by volume DV (.mu.m) of 3 .mu.m.ltoreq.DV.ltoreq.8 .mu.m, an average particle diameter by weight D4 (.mu.m) of 3.5 .mu.m.ltoreq.D4.ltoreq.9 .mu.m, and the ratio Nr of particles having a particle diameter smaller than 5 .mu.m in particle diameter distribution by number of 17% by number.ltoreq.Nr.ltoreq.90% by number.

    摘要翻译： 一种图像形成方法和图像形成装置，用于对感光构件充电，使带电的感光构件曝光，从而形成静电潜像，带有调色剂承载构件的调色剂，使调色剂与感光构件表面接触，从而显影静电潜像 在感光构件上形成调色剂图像，转印感光构件上的调色剂图像以转印诸如纸的材料，并且进行同时显影清洁处理，其恢复在转印过程之后残留在感光构件上的残留调色剂， 使得墨粉消耗量大大降低，同时保持高图像质量。 感光构件表面与水的接触角为85度以上，调色剂至少包含具有粘合剂树脂和着色剂的调色剂颗粒和无机细粉末，调色剂具有平均粒径（体积）DV （μm），平均颗粒直径D4（μm）为3.5μm，D4