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1.发明授权公开(公告)号：US10921723B2
公开(公告)日：2021-02-16
申请号：US16597152
申请日：2019-10-09
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kumiko Takizawa , Tsuyoshi Shimada , Takanori Ueno , Ikuyo Kuroiwa , Haruhiko Mitsuda , Kan Tanabe , Tatsuya Ikezue
Abstract: Provided is an electrophotographic photosensitive member that can achieve both of abrasion resistance and the suppression of a ghost. The electrophotographic photosensitive member includes: a support; an undercoat layer; a charge-generating layer; and a charge-transporting layer, the undercoat layer, the charge-generating layer, and the charge-transporting layer being arranged in the stated order on the support, wherein the charge-transporting layer includes a charge-transporting substance, and a polymer containing a structure represented by the following general formula (1) and a structure represented by the following general formula (2), wherein the charge-generating layer includes a phthalocyanine crystal and a binder resin, and wherein the undercoat layer includes strontium titanate particles and a binder resin.
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公开(公告)号：US20130077987A1
公开(公告)日：2013-03-28
申请号：US13625973
申请日：2012-09-25
Applicant: CANON KABUSHIKI KAISHA
Inventor： Daisuke Tazawa , Tomohito Ozawa , Takanori Ueno
CPC classification number: G03G15/75 , G03G15/0258
Abstract: An electrophotographic apparatus suppresses the unevenness of image density, even though the electrophotographic apparatus has no heater for an electrophotographic photosensitive member. The electrophotographic photosensitive member is arranged in the electrophotographic apparatus so that when the electrophotographic photosensitive member is equally divided into two regions in a cylindrical shaft direction, absolute values of a temperature dependence of photosensitive-member characteristics in the two regions are not the same, and when a region out of the two regions which has a smaller absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a first region, and a region which has a larger absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a second region, the change of a surface temperature of the first region becomes larger than the change of a surface temperature of the second region when an image is formed by the apparatus.
Abstract translation: 即使电子照相设备没有用于电子照相感光构件的加热器，电子照相设备抑制图像浓度的不均匀性。 电照相感光构件布置在电子照相设备中，使得当电子照相感光构件在圆柱轴方向上被均匀分成两个区域时，两个区域中感光构件特性的温度依赖性的绝对值是不相同的，并且 当感光构件特性的温度依赖性的绝对值较小的两个区域中的区域被定义为第一区域时，并且具有较高的感光构件特性的温度依赖性绝对值的区域 被定义为第二区域时，当由该装置形成图像时，第一区域的表面温度的变化变得大于第二区域的表面温度的变化。
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3.发明授权公开(公告)号：US08831481B2
公开(公告)日：2014-09-09
申请号：US13625973
申请日：2012-09-25
Applicant: Canon Kabushiki Kaisha
Inventor： Daisuke Tazawa , Tomohito Ozawa , Takanori Ueno
CPC classification number: G03G15/75 , G03G15/0258
Abstract: An electrophotographic apparatus does not have a unit for maintaining a uniform surface temperature of an electrophotographic photosensitive member through its surface. The electrophotographic photosensitive member has temperature dependent characteristics and is equally divided into two regions in a cylindrical shaft direction such that absolute values of the temperature dependence of the photosensitive-member characteristics in the two regions are not the same. The electrophotographic photosensitive member is arranged so that when, among the two regions, a region which has a smaller absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a first region, and a region which has a larger absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a second region. The change of the surface temperature of the first region becomes larger than the change of the surface temperature of the second region when an image is formed by the electrophotographic apparatus.
Abstract translation: 电子照相设备不具有用于通过其表面保持电子照相感光构件的均匀表面温度的单元。 电子照相感光构件具有温度依赖特性，并且在圆柱形轴方向上等分成两个区域，使得两个区域中的感光构件特性的温度依赖性的绝对值不相同。 电子照相感光构件被布置成使得当在两个区域中，将具有较小的感光构件特性的温度依赖性的较小绝对值的区域定义为第一区域时，并且具有较大绝对值的区域 感光构件特性的温度依赖性被定义为第二区域。 当由电子照相设备形成图像时，第一区域的表面温度的变化变得大于第二区域的表面温度的变化。
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公开(公告)号：US20230259045A1
公开(公告)日：2023-08-17
申请号：US18156611
申请日：2023-01-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Ryoichi Tokimitsu , Haruhiko Mitsuda , Jun Ohira , Toshiyasu Shirasuna , Ikuyo Kuroiwa , Tsuyoshi Shimada , Takanori Ueno , Kenichi Ikari , Eileen Takeuchi
CPC classification number: G03G5/071 , G03G5/14791 , G03G5/14726 , G03G5/0564
Abstract: Provided is an electrophotographic photosensitive member including a surface layer, which is excellent in dispersibility of fluorine atom-containing resin particles and is suppressed from causing a ghost image. Specifically, provided is an electrophotographic photosensitive member including a surface layer, wherein the surface layer contains a fluorine atom-containing resin particle, a binder material, and a polymer A having specific structural units.
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5.发明申请公开(公告)号：US20190369513A1
公开(公告)日：2019-12-05
申请号：US16426069
申请日：2019-05-30
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takanori Ueno , Kumiko Takizawa , Ikuyo Kuroiwa , Tsuyoshi Shimada , Wataru Kitamura , Eileen Takeuchi
Abstract: Provided is an electrophotographic photosensitive member that can suppress the generation of both an interference fringe and a streaky uneven part in a circumferential direction on an image. The generation of the interference fringe and the generation of the streaky uneven part in the circumferential direction on the image are suppressed by defining a length of a line-shaped groove of a support in a circumferential direction, and defining roughness parameters of a support in an axial direction.
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Patent Agency Ranking
公开(公告)号：US11556082B2
公开(公告)日：2023-01-17
申请号：US16507220
申请日：2019-07-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Ryosuke Tsuruga , Toshiyuki Yoshida , Jun Ohira , Akeshi Asaka , Hiroto Sugimoto , Takanori Ueno , Koji Sato , Midai Suzuki , Atsushi Hori , Kaoru Okamoto , Megumi Uchino , Kazuhisa Shirayama , Naoto Kameyama , Kiyonori Soutome , Shigeo Kuroda , Akira Okano , Hiroshi Tominaga
IPC: G03G15/16 , B29B7/90 , B29D23/00 , B29K507/04 , B29K101/12
Abstract: An intermediary transfer belt having surface resistivity ρs of 1×109 Ω/square or more and volume resistivity ρv of 1×1012 Ω·cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.
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公开(公告)号：US10338486B2
公开(公告)日：2019-07-02
申请号：US16120563
申请日：2018-09-04
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yukihiro Abe , Jun Ohira , Kazunari Ooyama , Takanori Ueno , Hironori Owaki , Yasuo Kojima
Abstract: An average value of a hydrogen content ratio of a surface layer made of hydrogenated amorphous carbon is set to be 0.40 or less and a maximum value of an sp2 bonding ratio in an outermost surface region of the surface layer made of the hydrogenated amorphous carbon is set to be 0.50 or less.
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公开(公告)号：US20190072866A1
公开(公告)日：2019-03-07
申请号：US16120563
申请日：2018-09-04
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yukihiro Abe , Jun Ohira , Kazunari Ooyama , Takanori Ueno , Hironori Owaki , Yasuo Kojima
CPC classification number: G03G5/14704 , G03G5/082 , G03G5/08214 , G03G5/08278 , G03G5/08285 , G03G5/144 , G03G15/75
Abstract: An average value of a hydrogen content ratio of a surface layer made of hydrogenated amorphous carbon is set to be 0.40 or less and a maximum value of an sp2 bonding ratio in an outermost surface region of the surface layer made of the hydrogenated amorphous carbon is set to be 0.50 or less.
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9.发明申请公开(公告)号：US20190072865A1
公开(公告)日：2019-03-07
申请号：US16114866
申请日：2018-08-28
Applicant: CANON KABUSHIKI KAISHA
Inventor： Jun Ohira , Hironori Owaki , Yukihiro Abe , Yasuo Kojima , Kazunari Ooyama , Takanori Ueno
Abstract: The present invention provides an electrophotographic photosensitive member which has a substrate, a photoconductive layer and a surface layer formed from hydrogenated amorphous silicon carbide in this order. The average value of the carbon content (C/(C+Si)) of the surface layer formed from the hydrogenated amorphous silicon carbide is set at 0.90 or more and less than 1.00, and the average value of the hydrogen content (H/(H+C+Si)) is set at 0.40 or less; and when the average value of the ratios of the sum of a Si—O bond and an O—Si—O bond in the outermost surface region that constitutes a range within a depth of 5 nm or less from the outermost surface of the surface layer is represented by a, and an average value of the silicon content (Si/(C+Si)) is represented by b, 0.015≤a*b≤0.090 holds.
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10.发明授权公开(公告)号：US10935898B2
公开(公告)日：2021-03-02
申请号：US16655494
申请日：2019-10-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Ikuyo Kuroiwa , Kumiko Takizawa , Tsuyoshi Shimada , Kan Tanabe , Haruhiko Mitsuda , Takanori Ueno , Tatsuya Ikezue , Wataru Kitamura
Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer, a photosensitive layer, and a surface layer, the undercoat layer containing a binder resin and strontium titanate particles, the surface layer being a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.
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