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61. 发明申请

US20210116826A1 PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS 有权
公开(公告)号：US20210116826A1
公开(公告)日：2021-04-22
申请号：US17069919
申请日：2020-10-14
申请人： CANON KABUSHIKI KAISHA
发明人： Tsutomu Nishida , Yuka Ishiduka , Kenichi Kaku , Nobuhiro Nakamura , Hiroyuki Watanabe , Hideharu Shimozawa , Atsushi Okuda , Yuichi Kikuchi , Kazuhiro Yamauchi
IPC分类号： G03G5/10 , G03G5/147 , C08K3/04 , C08K3/26 , C08L19/00 , G03G21/18
摘要： A process cartridge which allows any spot and stripe as image defects to be suppressed is provided. A process cartridge, in which an electroconductive layer of a charging member has a matrix including a first rubber, and domains dispersed in the matrix, the domains include a second rubber and an electron electroconductive agent, at least some of the domains are exposed on a surface of the charging member, when a volume resistivity of the matrix is 105 times or more a volume resistivity of the domains, a protective layer of an electrophotographic photosensitive member includes a metal oxide particle, and when a number average primary particle size of the metal oxide particle is defined as Sm and an average value of equivalent circle diameters of the domains is defined as Sd, the Sd/Sm satisfies the following expression (1): 0.5

62. 发明申请

US20210033996A1 ELECTROCONDUCTIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 有权
公开(公告)号：US20210033996A1
公开(公告)日：2021-02-04
申请号：US17072463
申请日：2020-10-16
申请人： CANON KABUSHIKI KAISHA
发明人： Yuichi Kikuchi , Satoru Nishioka , Kenji Takashima , Kazuhiro Yamauchi , Masahiro Kurachi , Takumi Furukawa , Hiroaki Watanabe , Kenya Terada , Yuya Tomomizu , Toshimitsu Nakazawa
IPC分类号： G03G15/02 , C08K3/04 , C08K3/26 , C08L19/00 , G03G21/18
摘要： Provided is an electrophotographic electroconductive member including an electroconductive support and an electroconductive layer on the support, an electroconductive member is used, in which an electroconductive layer has a matrix comprising a first rubber, and domains dispersed in the matrix, the domains each comprising a second rubber and an electronic electroconductive agent, and for impedance measured by applying an AC voltage with an amplitude of 1 V to the electroconductive layer while varying frequencies between 1.0×10−2 Hz to 1.0×107 Hz under a specific environment, when a double logarithmic plot with a frequency on an abscissa and an impedance on an ordinate is obtained, a slope on a high frequency side is −0.8 or more and −0.3 or less, and the impedance a low frequency side is from 1.0×103 to 1.0×107Ω.

63. 发明授权

US10678154B2 Electrophotographic electroconductive member, process cartridge, and electrophotographic image forming apparatus 有权
公开(公告)号：US10678154B2
公开(公告)日：2020-06-09
申请号：US15698018
申请日：2017-09-07
申请人： CANON KABUSHIKI KAISHA
发明人： Kenji Takashima , Kazuhiro Yamauchi , Masahiro Kurachi , Yuichi Kikuchi
IPC分类号： G03G5/14 , G03G15/02 , G03G15/08 , G03G15/16
摘要： An electrophotographic electroconductive member which keeps high discharge performance even in use under a high temperature and high humidity environment is provided. The electroconductive member includes an electroconductive substrate, and a surface layer including a net-like structural body disposed on the electroconductive substrate, wherein the net-like structural body includes non-electroconductive fibers containing a radiation degradable resin.

64. 发明授权

US10416588B2 Charging member, process cartridge, electrophotographic image forming apparatus, and method for manufacturing charging member 有权
公开(公告)号：US10416588B2
公开(公告)日：2019-09-17
申请号：US15789124
申请日：2017-10-20
申请人： CANON KABUSHIKI KAISHA
发明人： Hiroki Masu , Kazuhiro Yamauchi , Yuichi Kikuchi , Masaki Tsunoda , Takumi Furukawa
IPC分类号： G03G15/02 , G03G21/18
摘要： A charging member includes an electro-conductive substrate, an elastic layer, and a surface layer provided in this order. The elastic layer has, on an outer surface thereof, concave portions that are independent of each other, and hold insulating particles. The insulating particle is exposed to the surface of the elastic layer. A site in which an outer edge of the projection image derived from each of the insulating particles and an outer edge of a projection image derived from each of the concave portions are separated, exists. The charging member has convex portions derived from the insulating particles exposed to the surface of the elastic layer, and concave portions derived from the concave portions of the elastic layer. The surface layer has a volume resistivity of 1.0×1015 Ωcm or more.

65. 发明授权

US09958802B2 Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus 有权
公开(公告)号：US09958802B2
公开(公告)日：2018-05-01
申请号：US15543656
申请日：2016-03-23
申请人： CANON KABUSHIKI KAISHA
发明人： Yuichi Kikuchi , Kazuhiro Yamauchi , Norifumi Muranaka , Tetsuo Hino , Satoru Nishioka
IPC分类号： G03G15/02
CPC分类号： G03G15/0233 , G03G2215/0132
摘要： Provided is an electroconductive member for electrophotography capable of charging an electrically chargeable body stably over a long period of time. The electroconductive member includes an electroconductive support and a surface layer on the electroconductive support. The surface layer has a skeleton that is three-dimensionally continuous and a pore that communicates in a thickness direction, and when any region measuring 150 μm per side of a surface of the surface layer is photographed and equally divided into 60 parts in a vertical direction and 60 parts in a horizontal direction to form 3,600 squares, the number of squares including through holes is 100 or less. The skeleton is non-electroconductive and includes a plurality of particles connected to each other through a neck, and an average value D1 of circle-equivalent diameters of the particles is 0.1 μm or more and 20 μm or less.

66. 发明授权

US09146482B2 Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus 有权
标题翻译：电子照相用导电构件，处理盒和电子照相设备
公开(公告)号：US09146482B2
公开(公告)日：2015-09-29
申请号：US14601951
申请日：2015-01-21
申请人： CANON KABUSHIKI KAISHA
发明人： Masahiro Watanabe , Yuichi Kikuchi , Kazuhiro Yamauchi , Satoru Nishioka , Norifumi Muranaka , Mikio Shimada , Tetsuo Hino
IPC分类号： G03G15/02 , G03G5/04
CPC分类号： G03G5/04 , G03G15/0233 , G03G2215/00957
摘要： It is an object of the present invention to provide an electroconductive member for electrophotography capable of suppressing image density unevenness caused by the adhesion of foreign matter. Provided is an electroconductive member for electrophotography, including at least: an electroconductive support, and a surface layer formed on an outer side of the electroconductive support, in which the surface layer includes a porous body, and in which the porous body satisfies the following conditions (1) to (3): (1) the porous body has a co-continuous structure including at least a skeleton that is three-dimensionally continuous and a pore that is three-dimensionally continuous; (2) the porous body has electroconductivity; and (3) an average diameter of a maximum inscribed circle of an opening of the pore on a surface of the porous body is 3 μm or more and 8 μm or less.
摘要翻译：本发明的目的是提供一种能够抑制异物附着引起的图像浓度不均匀的电子照相用导电部件。本发明提供一种电子照相用导电部件，其至少包括：导电性支持体和形成在导电性支持体的外侧的表面层，其中，表面层包含多孔体，多孔体中满足以下条件（1）〜（3）所述的多孔体：（1）多孔体具有至少包含三维连续的骨架和三维连续的孔的共连续结构，（2）多孔体具有导电性; 和（3）多孔体的表面上的孔的开口的最大内切圆的平均直径为3μm以上且8μm以下。

67. 发明申请

US20150093151A1 ELECTROCONDUCTIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS 有权
标题翻译：电子元件，工艺盒和电子照相设备
公开(公告)号：US20150093151A1
公开(公告)日：2015-04-02
申请号：US14491420
申请日：2014-09-19
申请人： CANON KABUSHIKI KAISHA
发明人： Norifumi Muranaka , Kazuhiro Yamauchi , Yuichi Kikuchi , Koji Otsuka , Masaki Imoto , Tetsuo Hino , Satoru Nishioka
IPC分类号： G03G15/02
CPC分类号： G03G15/0291 , G03G15/0233 , G03G15/1685
摘要： The electroconductive member has an electroconductive support and a surface layer formed on the electroconductive support, wherein the surface layer has a porous body having a continuous open pore, and the electroconductive member satisfies the following (1) and (2): (1) in a specific condition, a surface potential of the electroconductive member, after an elapse of 10 seconds since a completion of a discharge is 10 V or more; and (2) when applying a direct voltage between a polyethylene terephthalate film as a member to be charged and the electroconductive member, and charging the polyethylene terephtalate film, |Vd|≧|Vin|−|Vth| is satisfied within a range of |Vin|>|Vth|, wherein, Vd represents a charge potential of the polyethylene terephtalate film, Vin represents a voltage applied between the electroconductive member and the polyethylene terephtalate film, Vth represents a discharge starting voltage.
摘要翻译：导电构件具有导电支撑体和形成在导电支撑体上的表面层，其中表面层具有具有连续开孔的多孔体，并且导电构件满足以下（1）和（2）：（1）特定条件，导电构件的表面电位在放电完成后经过10秒后为10V以上; 和（2）在作为被充电元件的聚对苯二甲酸乙二醇酯膜和导电元件之间施加直流电压，并对聚对苯二甲酸乙二醇酯膜进行充电，| Vd |≥| Vin | - | Vth | 在| Vin |> | Vth |的范围内满足，其中Vd表示聚对苯二甲酸乙二醇酯膜的电荷电位，Vin表示在导电构件和聚对苯二甲酸乙二醇酯膜之间施加的电压，Vth表示放电起始电压。

68. 发明申请

US20130236213A1 ELECTRO-CONDUCTIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS 有权
标题翻译：电子导电构件，工艺盒和电子照相设备
公开(公告)号：US20130236213A1
公开(公告)日：2013-09-12
申请号：US13873896
申请日：2013-04-30
申请人： CANON KABUSHIKI KAISHA
发明人： Kazuhiro Yamauchi , Satoru Nishioka , Masahiro Watanabe , Yuichi Kikuchi , Satoru Yamada , Norifumi Muranaka
IPC分类号： G03G5/147
CPC分类号： G03G5/14708 , G03G15/0233 , G03G15/0818 , G03G15/1685 , Y10T428/31511 , Y10T428/31551 , Y10T428/31663 , Y10T428/31725 , Y10T428/31786
摘要： To suppress an excessive reduction in resistance of an electro-conductive roller under an H/H environment and reduce a resistance value thereof under an L/L environment, provided is an electro-conductive member for electrophotography, comprising: an electro-conductive mandrel; and an electro-conductive layer provided on a periphery of the mandrel, wherein the electro-conductive layer contains a binder resin having an alkylene oxide structure, and a sulfo or a quaternary ammonium group as an ion exchange group, and an ion having polarity opposite to polarity of the ion exchange group, a water content of the electro-conductive layer under a temperature of 30° C. and a relative humidity of 80% is 10 mass % or less, and a spin-spin relaxation time of the electro-conductive layer, which is determined by pulse NMR measurement with a hydrogen core being a measurement core under a temperature of 15° C. and a relative humidity of 10%, is 200 μsec or more.
摘要翻译：为了抑制导电辊在H / H环境下的电阻的过度降低并且在L / L环境下降低其电阻值，提供了一种用于电子照相的导电构件，其包括：导电心轴; 以及设置在心轴的周围的导电层，其中导电层含有具有烯化氧结构的粘合剂树脂和作为离子交换基团的磺基或季铵基，和具有极性相反的离子对于离子交换基团的极性，在30℃的温度和80％的相对湿度下，导电层的含水量为10质量％以下，电纺丝的自旋自旋弛豫时间，在15℃的温度和10％的相对湿度下，通过氢核作为测量芯的脉冲NMR测定确定的导电层为200个以上。

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