公开(公告)号：US07016630B2

公开(公告)日：2006-03-21

申请号：US10836278

申请日：2004-05-03

Applicant: Kazumi Yoshizaki ,  Kenji Okado ,  Masashige Tamura ,  Naotaka Ikeda

Inventor： Kazumi Yoshizaki ,  Kenji Okado ,  Masashige Tamura ,  Naotaka Ikeda

IPC: G03G15/08

CPC classification number: G03G15/0808 ,  G03G15/09 ,  G03G2215/0177

Abstract: In an image forming apparatus having a powder transport mechanism including a powder container and a powder transport means which rotates relative to the powder container, the powder transport means has the rotation center substantially on the axis of the powder container, and the space between the inner wall surface of the powder container and the powder transport means is sealed with magnetic particles held by a magnetic-filed generation means. The magnetic particles have a specific saturation magnetization σs and a specific value of A×σA where the residual magnetic flux density of the magnetic-field generation means is represented by A in a specific range and the magnetization intencity of the magnetic particles in a magnetic field with the residual magnetic flux density A is represented by σA.

Abstract translation: 在具有粉末输送机构的图像形成装置中，粉末输送机构包括粉末容器和相对于粉末容器旋转的粉末输送装置，粉末输送装置具有大致在粉末容器的轴线上的旋转中心， 粉末容器的壁表面和粉末输送装置用磁场产生装置保持的磁性颗粒密封。 磁性颗粒具有特定的饱和磁化信号和Axsigma的特定值，其中磁场产生装置的剩余磁通密度由特定范围内的A表示，并且磁场强度 具有剩余磁通密度A的磁场中的磁性颗粒由σA表示。

公开(公告)号：US06465144B2

公开(公告)日：2002-10-15

申请号：US09800655

申请日：2001-03-08

Applicant: Akira Hashimoto ,  Kenji Okado ,  Tsutomu Kukimoto ,  Tatsuya Nakamura ,  Tsuyoshi Takiguchi ,  Tatsuhiko Chiba ,  Michihisa Magome ,  Keiji Komoto

Inventor： Akira Hashimoto ,  Kenji Okado ,  Tsutomu Kukimoto ,  Tatsuya Nakamura ,  Tsuyoshi Takiguchi ,  Tatsuhiko Chiba ,  Michihisa Magome ,  Keiji Komoto

IPC: G03G9083

CPC classification number: G03G9/08708 ,  G03G9/0819 ,  G03G9/0825 ,  G03G9/0827 ,  G03G9/0833 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/08782

Abstract: A magnetic toner includes: magnetic toner particles each comprising at least a binder resin and magnetic toner, and inorganic fine powder. The magnetic toner has an average circularity of at least 0.970, and a magnetization of 10-50 Am2/kg at a magnetic field of 79.6 kA/m. The magnetic powder comprises at least magnetic iron oxide. The magnetic toner particles retain carbon in an amount of A and iron in an amount of B at surfaces thereof as measured by X-ray photoelectron spectroscopy, satisfying: B/A

Abstract translation: 磁性调色剂包括：各自至少包含粘合剂树脂和磁性调色剂的磁性调色剂颗粒和无机细粉末。 磁性调色剂在79.6kA / m的磁场下的平均圆形度为至少0.970，磁化强度为10-50Am 2 / kg。 磁粉至少包含磁性氧化铁。 磁性调色剂颗粒通过X射线光电子能谱法测定其表面的B量的A和铁的碳，满足：B / A <0.001。 粘合剂树脂包括由至少包含苯乙烯单体的单体的聚合形成的树脂。 磁性调色剂的残留苯乙烯单体含量小于300ppm，并且包含满足以下关系的至少50％的调色剂颗粒：D / C <= 0.02，其中C表示磁性的体积平均粒径 调色剂，D表示磁性调色剂颗粒的表面与磁性调色剂颗粒中所含的磁性粉末颗粒之间的最小距离。 由于上述特征，即使在无清洁器模式的图像形成系统中，磁性调色剂也能表现出良好的电摄影性能，包括极佳的带电性和少量的转印残留调色剂。

公开(公告)号：US06372400B1

公开(公告)日：2002-04-16

申请号：US09606162

申请日：2000-06-29

Applicant: Kazumi Yoshizaki ,  Kenji Okado ,  Makoto Kanbayashi ,  Yushi Mikuriya

Inventor： Kazumi Yoshizaki ,  Kenji Okado ,  Makoto Kanbayashi ,  Yushi Mikuriya

IPC: G03G9113

CPC classification number: G03G9/1131 ,  G03G9/1075 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1137 ,  G03G9/1138 ,  G03G9/1139

Abstract: A carrier for use in electrophotography has carrier cores comprising a binder resin and metal compound particles dispersed therein, and a coating resin for coating the surfaces of the carrier cores. Water adsorption TH2O-H (% by weight) after the carrier has been left in an environment of 30° C./80%RH, water adsorption TH2O-L (% by weight) after the carrier has been left in an environment of 23° C./5%RH, and particle surface area Sm (cm2/g) of the carrier satisfy the following relationship: 6.00×10−6≦TH2O-H/(100×Sm)≦1.50×10−5, and 1.00×10−6≦TH2O-L/(100×Sm)≦5.50×10−6.

Abstract translation: 用于电子照相术的载体具有包含分散在其中的粘合剂树脂和金属化合物颗粒的载体芯，以及用于涂覆载体芯的表面的涂布树脂。 载体在30°C / 80％RH之间的水中吸附TH2O-H（重量％）后，载体在23度环境中被吸附后的水分吸附量TH2O-L（重量％） ℃5％RH，载体的颗粒表面积Sm（cm 2 / g）满足以下关系：

公开(公告)号：US06285848B1

公开(公告)日：2001-09-04

申请号：US09092935

申请日：1998-06-08

Applicant: Shuichi Aita ,  Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Fumihiro Arahira ,  Kiyoshi Mizoe ,  Yoshifumi Hano

Inventor： Shuichi Aita ,  Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Fumihiro Arahira ,  Kiyoshi Mizoe ,  Yoshifumi Hano

IPC: G03G1502

CPC classification number: G03G15/0241 ,  G03G21/0064 ,  G03G2215/022

Abstract: An electrophotographic apparatus includes an electrophotographic photosensitive member, and (i) a charger, (ii) an imagewise exposure device, (iii) a developing device and (iv) a transfer device, disposed in this order opposite to the photosensitive member. The charger includes a charging member including magnetic particles disposed in contact with the photosensitive member so as to charge the photosensitive member based on a voltage received thereby. The magnetic particles are surface-coated with a coupling agent having a linear alkyl group having a least 6 carbon atoms. The developing device also functions to recover residual toner remaining on the photosensitive member processing by the transfer device and the charger. Because of the coating with such a specific coupling agent, the charging magnetic particles can exhibit good triboelectric changeability for the transfer residual toner for a long period.

Abstract translation: 电子照相设备包括电子照相感光构件，以及（i）充电器，（ii）成像曝光装置，（iii）以与感光构件相对的顺序设置的显影装置和（iv）转印装置。 充电器包括充电构件，其包括与感光构件接触设置的磁性颗粒，以便基于由此接收的电压对感光构件充电。 磁性颗粒用具有至少6个碳原子的直链烷基的偶联剂进行表面涂覆。 显影装置还用于恢复由转印装置和充电器处理的感光构件上残留的残留调色剂。 由于用这种特殊的偶联剂进行涂布，所以带电磁性颗粒可以长时间显示转印残留调色剂的良好的摩擦带电性。

公开(公告)号：US6030737A

公开(公告)日：2000-02-29

申请号：US969064

申请日：1997-11-12

Applicant: Toshiyuki Ugai ,  Kenji Okado

Inventor： Toshiyuki Ugai ,  Kenji Okado

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/097

CPC classification number: G03G9/0904 ,  G03G9/091

Abstract: A non-magnetic toner for developing an electrostatic image has non-magnetic toner particles produced by polymerizing in an aqueous medium a polymerizable monomer composition containing at least a polymerizable monomer, a carbon black and an azo type iron compound. The carbon black has a DPB oil absorption of from 110 ml/100 g to 200 ml/100 g, a specific surface area of 100 m.sup.2 /g or below as measured by nitrogen adsorption, a volatile component of 2% or less and an average primary particle diameter of from 20 m.mu. to 60 m.mu., and the azo type iron compound is a compound represented by the following Formula (1). ##STR1##

Abstract translation: 用于显影静电图像的非磁性调色剂具有通过在水性介质中聚合至少包含可聚合单体，炭黑和偶氮型铁化合物的可聚合单体组合物而产生的非磁性调色剂颗粒。 碳黑的DPB吸油量为110ml / 100g至200ml / 100g，通过氮吸附测定的比表面积为100m 2 / g以下，挥发性成分为2％以下，平均粒径 一次粒径为20μm〜60μm，偶氮型铁化合物为下式（1）表示的化合物。

公开(公告)号：US5994019A

公开(公告)日：1999-11-30

申请号：US979960

申请日：1997-11-26

Applicant: Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Kazumi Yoshizaki

Inventor： Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Kazumi Yoshizaki

IPC: G03G13/02 ,  G03G15/02 ,  G03G9/083

CPC classification number: G03G13/025 ,  G03G15/0241 ,  G03G2215/022

Abstract: An image forming method is disclosed in which a contact charging means is brought into contact with a latent image bearing member to electrostatically charge the latent image bearing member on which electrostatic latent images are formed and developed with a one component type or two component type developer to form toner images, using a developing assembly provided with a developing container and a developer carrying member. The one component developer is comprised of toner particles. The two component type developer is comprised of toner particles and a magnetic carrier. The toner particles of the one component type and two component type developers contains fine particles as an external additive.The latent image bearing member has a surface layer having a volume resistivity A of from 10.sup.8 to 10.sup.15 .OMEGA..multidot.cm; the contact charging means comprises an assembly for electrostatically charging the latent image bearing member by applying a voltage to a charging member having a volume resistivity B of from 10.sup.4 to 10.sup.9 .OMEGA..multidot.cm; the toner has, as an external additive, fine particles having a volume resistivity C of from 10.sup.7 to 10.sup.11 .OMEGA..multidot.cm; the magnetic carrier has a volume resistivity D1 of from 10.sup.9 to 10.sup.15 .OMEGA..multidot.cm; and the developer carrying member has a surface layer having a volume resistivity D2 of from 10.sup.9 to 10.sup.15 .OMEGA..multidot.cm. The resistivities A, B, C, D1 and D2 stasisfy the following conditions: B

Abstract translation: 公开了一种图像形成方法，其中接触充电装置与潜像承载部件接触，以静电潜像形成和显影的潜像承载部件用单组分型或双组分型显影剂静电充电 使用具有显影容器和显影剂承载构件的显影组件形成调色剂图像。 单组分显影剂由调色剂颗粒组成。 双组分型显影剂由调色剂颗粒和磁性载体构成。 单组分型和二组分型显影剂的调色剂颗粒含有作为外部添加剂的细颗粒。 潜像承载部件具有体积电阻率A为108至1015欧米伽×厘米的表面层; 接触充电装置包括用于通过向体积电阻率B为104至109欧姆×xcm的充电部件施加电压来静电充电潜像承载部件的组件; 作为外部添加剂，调色剂具有体积电阻率C为107至1011欧米伽×厘米的细小颗粒; 磁性载体的体积电阻率D1为109〜1015ΩEGEG×cm; 并且显影剂承载构件具有体积电阻率D2为109至1015欧姆×xcm的表面层。 电阻率A，B，C，D1和D2停留在以下条件下：B

公开(公告)号：US5239343A

公开(公告)日：1993-08-24

申请号：US660152

申请日：1991-02-20

Applicant: Yuji Sakemi ,  Hatsuo Tajima ,  Kenji Okado ,  Masahiro Inoue

Inventor： Yuji Sakemi ,  Hatsuo Tajima ,  Kenji Okado ,  Masahiro Inoue

IPC: G03G15/09

CPC classification number: G03G15/09 ,  G03G15/0921

Abstract: A developing apparatus includes a developer layer thickness regulating zone downstream of one of magnetic poles of a stationary magnet disposed inside a developing sleeve, with respect to the rotational direction of the sleeve. In the regulating zone, there are provided a magnetic member and a non-magnetic member to regulate the layer thickness of the developer containing magnetic carrier particles and toner particles on the sleeve. The magnetic member has a width of not less than 1 mm and not more than 10 mm and a thickness of not less than 0.2 mm and not more than 3 mm.

Abstract translation: 显影装置包括相对于套筒的旋转方向设置在显影套筒内部的固定磁体的一个磁极下游的显影剂层厚度调节区域。 在调节区域中，设置有磁性构件和非磁性构件，以调节包含磁性载体颗粒的显影剂的层厚度和套筒上的调色剂颗粒。 磁性构件的宽度为1mm以上且10mm以下，厚度为0.2mm以上且3mm以下。

公开(公告)号：US5120631A

公开(公告)日：1992-06-09

申请号：US514232

申请日：1990-04-25

Applicant: Makoto Kanbayashi ,  Kenji Okado ,  Takayuki Nagatsuka ,  Yoshinobu Baba

Inventor： Makoto Kanbayashi ,  Kenji Okado ,  Takayuki Nagatsuka ,  Yoshinobu Baba

IPC: G03G9/08 ,  G03G9/09 ,  G03G9/097

CPC classification number: G03G9/09716 ,  G03G9/09 ,  G03G9/09708 ,  G03G9/09725

Abstract: A color toner, comprises non-magnetic resin particles containing a coloring agent and two types of inorganic oxide particles, wherein;particles of coloring agent have an average particle diameter D of 300 m.mu..ltoreq.D.ltoreq.800 m.mu. as determined by measurement of scattered-light intensity; coloring agent particles with a particle diameter of from (D-120) m.mu. to (D+120) m.mu. account for not less than 90% of the whole; coloring agent particles with a particle diameter of 169 m.mu. or less account for not more than 1.0%; and coloring agent particles with a particle diameter of 949 m.mu. or more account for not more than 0.5%;said color toner has a volume average diameter of from 6 to 10 .mu.m; colored resin particles with a particle diameter of 5 .mu.m or less are contained in a proportion of from 15 to 40% by number; colored resin particles with a particle diameter of from 12.7 to 16.0 .mu.m are contained in an amount of from 0.1 to 5.0% by volume; colored resin particles with a particle diameter of 16 .mu.m or more are contained in an amount of not more than 1.0% by volume; and colored resin particles with a particle diameter of from 6.35 to 10.1 .mu.m have a particle size distribution that satisfies the following expression:9.ltoreq.V.times.dv/N.ltoreq.14 wherein V represent a volume percentage of colored resin particles with a diameter of from 6.35 to 10.1 .mu.m; N represents a number percentage of colored resin particles with a diameter of from 6.35 to 10.1 .mu.m; and dv represents a volume average particle diameter of the whole colored resin particles; andsaid inorganic oxide particles comprise a hydrophobic inorganic oxide (A) having an absolute value of not less than 50 .mu.c/g for the amount of triboelectricity and a specific surface area S.sub.A of from 80 to 300 m.sup.2 /g as measured by the BET method, contained in an amount of a% by weight based on the colored resin particles, and a hydrophilic inorganic oxide (B) having an absolute value of not more than 20 .mu.c/g for the amount of triboelectricity and a specific surface area S.sub.B of from 30 to 200 m.sup.2 /g as measured by the BET method, contained in an amount of b% by weight based on the colored resin particles, where S.sub.A .gtoreq.S.sub.B, a.gtoreq.b, and 0.3.ltoreq.a+b.ltoreq.1.5.

公开(公告)号：US07070898B2

公开(公告)日：2006-07-04

申请号：US10726503

申请日：2003-12-04

Applicant: Tatsuya Nakamura ,  Kenji Okado ,  Akira Hashimoto ,  Keiji Komoto

Inventor： Tatsuya Nakamura ,  Kenji Okado ,  Akira Hashimoto ,  Keiji Komoto

IPC: G03G9/08

CPC classification number: G03G9/08 ,  G03G9/087

Abstract: A toner having a favorable fixability, excelling in charge stability, and capable of forming a image of retaining a high image density and a high resolution in long-term use is provided. That is, the toner of the present invention is a toner obtained by polymerizing a polymerizable monomer composition comprising a polymerizable monomer and a colorant, in which the polymerizable monomer composition is polymerized using a polymerization initiator comprising a redox initiator which includes an organic peroxide with a 10-hour half-life temperature of 86° C. or higher and an reducing agent; the toner has a ratio of a weight-average particle diameter to a number-average particle diameter of 1.40 or less; and the toner has top of a main-peak in a molecular weight range of 5,000 to 50,000 in a molecular weight distribution measured using GPC of the THF-soluble part thereof, including t-butanol with a content of 0.1 to 1,000 ppm.

Abstract translation: 提供了具有良好的定影性，电荷稳定性优异并且能够形成长期使用中保持高图像浓度和高分辨率的图像的调色剂。 也就是说，本发明的调色剂是通过使包含可聚合单体和着色剂的可聚合单体组合物聚合而获得的调色剂，其中使用包含有机过氧化物的氧化还原引发剂的聚合引发剂聚合可聚合单体组合物， 10小时半衰期为86℃以上的还原剂; 调色剂的重均粒径与数均粒径的比值为1.40以下; 并且调色剂在其THF可溶部分的GPC测量的分子量分布中具有5000至50,000的分子量范围内的主峰顶部，包括含量为0.1至1,000ppm的叔丁醇。

公开(公告)号：US06855469B2

公开(公告)日：2005-02-15

申请号：US10274898

申请日：2002-10-22

Applicant: Naotaka Ikeda ,  Kenji Okado ,  Yushi Mikuriya ,  Shinya Yachi ,  Kazumi Yoshizaki ,  Katsuyuki Nonaka

Inventor： Naotaka Ikeda ,  Kenji Okado ,  Yushi Mikuriya ,  Shinya Yachi ,  Kazumi Yoshizaki ,  Katsuyuki Nonaka

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113 ,  G03G13/01 ,  G03G15/01

CPC classification number: G03G13/013 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1135 ,  G03G2215/0129 ,  G03G2215/0177

Abstract: In a full-color image-forming method having at least a charging step, a latent-image-forming step, a developing step of developing an electrostatic latent image by the use of a developer; a transfer step, and a fixing step, the developer comprises a plurality of color developers and a black developer. The color developers are each a two-component developer for full-color image formation which has i) a color toner having color toner particles containing at least a binder resin, a colorant and a wax and ii) a carrier for the color developer. The black developer is a two-component developer for full-color image formation which has i) a black toner having black toner particles containing at least a binder resin, carbon black and a wax and ii) a carrier for the black developer. The carrier for the black developer has a larger absolute value of charge quantity when the same toner is used, than the respective carriers for the color developers.

Abstract translation: 在具有至少充电步骤，潜像形成步骤，通过使用显影剂显影静电潜像的显影步骤的全色图像形成方法中; 转印步骤和定影步骤，显影剂包括多个显色剂和黑色显影剂。 显色剂各自是用于全色图像形成的双组分显影剂，其具有i）具有至少含有粘合剂树脂，着色剂和蜡的彩色调色剂颗粒的彩色调色剂和ii）用于显色剂的载体。 黑色显影剂是用于全色图像形成的双组分显影剂，其具有i）黑色调色剂，其具有至少含有粘合剂树脂，炭黑和蜡的黑色调色剂颗粒，以及ii）用于黑色显影剂的载体。 黑色显影剂的载体与使用相同的调色剂的电荷量的绝对值大于彩色显影剂的各个载体。