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1.发明授权公开(公告)号：US11175602B2
公开(公告)日：2021-11-16
申请号：US17072206
申请日：2020-10-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kazuhiro Yamauchi , Kana Sato , Takumi Furukawa , Hiroaki Watanabe , Kenya Terada , Yuya Tomomizu , Toshimitsu Nakazawa
Abstract: An electroconductive member for electrophotography has an electroconductive support and an electroconductive layer in the order mentioned. The electroconductive layer has a matrix including a crosslinked product of a first rubber, and a domain including a crosslinked product of a second rubber and an electroconductive particle. The impedance of an outer surface of the electroconductive member is 1.0×103 to 1.0×108Ω. 80% by number or more of domains observed at each of a total of nine 15-μm square observation regions, which are disposed at any three points in a thickness region from the outer surface to a specific depth on each of cross sections in a thickness direction at three points: the center of the electroconductive layer in the longitudinal direction and points at a specific distance from both edges of the electroconductive layer toward the center, satisfy specific requirements.
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公开(公告)号：US20220011684A1
公开(公告)日：2022-01-13
申请号：US17486162
申请日：2021-09-27
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Kazuhiro Yamauchi , Hiroaki Watanabe , Takumi Furukawa , Yasuhiro Fushimoto , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kana Sato
Abstract: Provided an electrophotographic electro-conductive member that can stably suppress an occurrence of fogging in an electrophotographic image. The member comprises a support having an electro-conductive outer surface, and an electro-conductive layer on the outer surface of the support, the electro-conductive layer having a matrix including a cross-linked product of a first rubber, and domains dispersed in the matrix, the domains each includes a cross-linked product of a second rubber and an electro-conductive particle, at least some of the domains is exposed to the outer surface of the electro-conductive member to constitute protrusions on an outer surface of the member, the outer surface of the electro-conductive member is constituted by the matrix and the domains exposed to the outer surface of the electrophotographic electro-conductive member, the electrophotographic electro-conductive member has an impedance of 1.0×103Ω or more and 1.0×108Ω or less, and some of the domains satisfy two specific requirements.
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3.发明申请公开(公告)号：US20220026825A1
公开(公告)日：2022-01-27
申请号：US17496402
申请日：2021-10-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kazuhiro Yamauchi , Kana Sato , Takumi Furukawa , Hiroaki Watanabe , Kenya Terada , Yuya Tomomizu , Toshimitsu Nakazawa
Abstract: An electroconductive member for electrophotography has an electroconductive support and an electroconductive layer in the order mentioned. The electroconductive layer has a matrix including a crosslinked product of a first rubber, and a domain including a crosslinked product of a second rubber and an electroconductive particle. The impedance of the outer surface of the electroconductive member is 1.0×103 to 1.0×108Ω). 80% by number or more of domains observed at each of a total of nine 15-μm square observation regions, which are disposed at any three points in a thickness region from the outer surface to a specific depth on each of cross sections in the thickness direction at three points: the center of the electroconductive layer in the longitudinal direction and points at a specific distance from the both edges of the electroconductive layer toward the center, satisfy specific requirements.
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Patent Agency Ranking
公开(公告)号：US11169454B2
公开(公告)日：2021-11-09
申请号：US16828572
申请日：2020-03-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Kazuhiro Yamauchi , Hiroaki Watanabe , Takumi Furukawa , Yasuhiro Fushimoto , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kana Sato
IPC: G03G5/00 , G03G5/10 , G03G15/00 , G03G21/18 , G03G5/05 , G03G5/06 , G03G15/16 , G03G15/02 , G03G5/07
Abstract: Provided an electrophotographic electro-conductive member that can stably suppress an occurrence of fogging in an electrophotographic image. The member comprises a support having an electro-conductive outer surface, and an electro-conductive layer on the outer surface of the support, the electro-conductive layer having a matrix including a cross-linked product of a first rubber, and domains dispersed in the matrix, the domains each includes a cross-linked product of a second rubber and an electro-conductive particle, at least some of the domains is exposed to the outer surface of the electro-conductive member to constitute protrusions on an outer surface of the member, the outer surface of the electro-conductive member is constituted by the matrix and the domains exposed to the outer surface of the electrophotographic electro-conductive member, the electrophotographic electro-conductive member has an impedance of 1.0×103Ω or more and 1.0×108Ω or less, and some of the domains satisfy two specific requirements.
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5.发明申请公开(公告)号：US20210041796A1
公开(公告)日：2021-02-11
申请号：US17072206
申请日：2020-10-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kazuhiro Yamauchi , Kana Sato , Takumi Furukawa , Hiroaki Watanabe , Kenya Terada , Yuya Tomomizu , Toshimitsu Nakazawa
IPC: G03G5/05
Abstract: An electroconductive member for electrophotography has an electroconductive support and an electroconductive layer in the order mentioned. The electroconductive layer has a matrix including a crosslinked product of a first rubber, and a domain including a crosslinked product of a second rubber and an electroconductive particle. The impedance of the outer surface of the electroconductive member is 1.0×103 to 1.0×108 Ω. 80% by number or more of domains observed at each of a total of nine 15-μm square observation regions, which are disposed at any three points in a thickness region from the outer surface to a specific depth on each of cross sections in the thickness direction at three points: the center of the electroconductive layer in the longitudinal direction and points at a specific distance from the both edges of the electroconductive layer toward the center, satisfy specific requirements.
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6.发明申请公开(公告)号：US20200310265A1
公开(公告)日：2020-10-01
申请号：US16828572
申请日：2020-03-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Kazuhiro Yamauchi , Hiroaki Watanabe , Takumi Furukawa , Yasuhiro Fushimoto , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kana Sato
Abstract: Provided an electrophotographic electro-conductive member that can stably suppress an occurrence of fogging in an electrophotographic image. The member comprises a support having an electro-conductive outer surface, and an electro-conductive layer on the outer surface of the support, the electro-conductive layer having a matrix including a cross-linked product of a first rubber, and domains dispersed in the matrix, the domains each includes a cross-linked product of a second rubber and an electro-conductive particle, at least some of the domains is exposed to the outer surface of the electro-conductive member to constitute protrusions on an outer surface of the member, the outer surface of the electro-conductive member is constituted by the matrix and the domains exposed to the outer surface of the electrophotographic electro-conductive member, the electrophotographic electro-conductive member has an impedance of 1.0×103Ω or more and 1.0×108Ω or less, and some of the domains satisfy two specific requirements.
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公开(公告)号：US11971683B2
公开(公告)日：2024-04-30
申请号：US17486162
申请日：2021-09-27
Applicant: CANON KABUSHIKI KAISHA
Inventor： Satoru Nishioka , Kazuhiro Yamauchi , Hiroaki Watanabe , Takumi Furukawa , Yasuhiro Fushimoto , Masahiro Kurachi , Kenji Takashima , Yuichi Kikuchi , Kana Sato
CPC classification number: G03G5/105 , G03G5/051 , G03G5/06 , G03G5/07 , G03G5/104 , G03G15/0233 , G03G15/1685 , G03G15/75 , G03G21/18
Abstract: Provided an electrophotographic electro-conductive member that can stably suppress an occurrence of fogging in an electrophotographic image. The member comprises a support having an electro-conductive outer surface, and an electro-conductive layer on the outer surface of the support, the electro-conductive layer having a matrix including a cross-linked product of a first rubber, and domains dispersed in the matrix, the domains each includes a cross-linked product of a second rubber and an electro-conductive particle, at least some of the domains is exposed to the outer surface of the electro-conductive member to constitute protrusions on an outer surface of the member, the outer surface of the electro-conductive member is constituted by the matrix and the domains exposed to the outer surface of the electrophotographic electro-conductive member, the electrophotographic electro-conductive member has an impedance of 1.0×103Ω or more and 1.0×108Ω or less, and some of the domains satisfy two specific requirements.
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公开(公告)号：US20230095958A1
公开(公告)日：2023-03-30
申请号：US17822723
申请日：2022-08-26
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kana Sato , Ryo Ogawa , Masahiro Watanabe , Takayuki Hiratani , Tetsuo Hino , Masaki Tsunoda
Abstract: Provided is a cleaning blade including: an elastic member containing a polyurethane; and a supporting member configured to support the elastic member. The polyurethane has a linear moiety represented by —(CH2)m-. The elastic member has a plate shape having a main surface and a distal end surface forming a distal end-side edge with the main surface, at least on a distal end side. Martens hardness at positions on a bisector at intervals of 30 μm from a distal end-side edge to a position furthest away from the distal end-side edge by 100 μm decreases from a distal end-side edge to the position. A Martens hardness HM1 of the elastic member at a position P1 is 1.0 N/mm2 or more. The elastic layer satisfies Kω1>Kω2>Kω3. Further, the cleaning blade has an erosion rate E of 0.6 μm/g or less.
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