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公开(公告)号：US12147170B2
公开(公告)日：2024-11-19
申请号：US17437987
申请日：2020-03-11
Applicant: Canon Kabushiki Kaisha
Inventor： Yuta Isobe , Kuniaki Tamagaki , Takashi Koyanagi , Akihisa Matsukawa , Ryosuke Kanai , Hiroki Tanaka , Motonari Ito , Kazuhisa Shida , Makoto Fukatsu
Abstract: An image forming apparatus includes a developer carrying member that bears and conveys developer. The developer carrying member has at least a base and a surface layer, with the surface layer having an electron donating portion that mainly donates charge to the developer when the developer and the surface layer make frictional contact to exchange charge and an electron accepting portion that mainly accepts charge from the developer when the developer and the surface layer makes frictional contact to exchange charge. A controller applies an AC voltage to the developer carrying member during a period in which an image forming operation is not performed and the developer carrying member is driven, with the AC voltage being different from that applied during an image forming period, and a rotating speed of the developer carrying member during a non-image forming period is slower than that during an image forming period.
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2.发明申请公开(公告)号：US20170293243A1
公开(公告)日：2017-10-12
申请号：US15476633
申请日：2017-03-31
Applicant: CANON KABUSHIKI KAISHA
Inventor： Shunsuke Mizukoshi , Kazuhisa Shida , Takayuki Kanazawa , Yuta Isobe , Makoto Tokudome
IPC: G03G15/08
CPC classification number: G03G15/0891 , G03G15/0865 , G03G15/0882 , G03G21/1814 , G03G2215/0687 , G03G2215/0825 , G03G2215/0875 , G03G2215/0877 , G03G2215/088
Abstract: The disclosed structure includes a belt-shaped conveying member configured to convey developer. The conveying member includes a partitioning portion, which is a partition for developer contained in a casing with respect to a conveying direction in which the developer is conveyed, wherein, when the developer container is new, a first developer amount which is an amount of the developer contained at an upstream side that is upstream of the partitioning portion in the conveying direction, is larger than a second developer amount which is an amount of the developer contained at a downstream side that is downstream of the partitioning portion in the conveying direction.
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3.发明授权公开(公告)号：US09599915B2
公开(公告)日：2017-03-21
申请号：US14629265
申请日：2015-02-23
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Anezaki , Kazuhisa Shida , Haruyuki Tsuji , Atsushi Fujii , Nobuhiro Nakamura , Hiroyuki Tomono , Hideaki Matsuoka
Abstract: A conductive layer of an electrophotographic photosensitive member includes a binder material, a first metal oxide particle, and a second metal oxide particle. The first metal oxide particle is a zinc oxide particle or tin oxide particle coated with tin oxide doped with phosphorus, tungsten, niobium, tantalum, or fluorine. The second metal oxide particle is an uncoated zinc oxide particle or tin oxide particle. The content of the first metal oxide particle is not less than 20% by volume and not more than 50% by volume based on the total volume of the conductive layer. The content of the second metal oxide particle is not less than 0.1% by volume and not more than 15% by volume based on the total volume of the conductive layer, and not less than 0.5% by volume and not more than 30% by volume based on the content of the first metal oxide particle.
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公开(公告)号：US09372417B2
公开(公告)日：2016-06-21
申请号：US14396350
申请日：2013-06-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Fujii , Hideaki Matsuoka , Haruyuki Tsuji , Nobuhiro Nakamura , Kazuhisa Shida
CPC classification number: G03G5/08 , G03G5/0525 , G03G5/104 , G03G5/144
Abstract: A method for producing an electrophotographic photosensitive member in which leakage hardly occurs is provided. For this, in the method for producing an electrophotographic photosensitive member according to the present invention, a coating liquid for a conductive layer is prepared using a solvent, a binder material, and a metallic oxide particle having a water content of not less than 1.0% by mass and not more than 2.0% by mass; using the coating liquid for a conductive layer, a conductive layer having a volume resistivity of not less than 1.0×108 Ω·cm and not more than 5.0×1012 Ω·cm is formed; the mass ratio (P/B) of the metallic oxide particle (P) to the binder material (B) in the coating liquid for a conductive layer is not less than 1.5/1.0 and not more than 3.5/1.0; and the metallic oxide particle is selected from the group consisting of a titanium oxide particle coated with tin oxide doped with phosphorus, a titanium oxide particle coated with tin oxide doped with tungsten, and a titanium oxide particle coated with tin oxide doped with fluorine.
Abstract translation: 提供了几乎不发生泄漏的电子照相感光构件的制造方法。 为此，在本发明的电子照相感光体的制造方法中，使用溶剂，粘合剂材料和含水率为1.0％以上的金属氧化物粒子制备导电层用涂布液， 以质量％计不超过2.0质量％ 使用涂布液作为导电层，形成体积电阻率不小于1.0×10 8Ω·cm·cm且不大于5.0×10 12Ω·cm·cm的导电层; 导电层用涂布液中的金属氧化物粒子（P）与粘合剂材料（B）的质量比（P / B）为1.5 / 1.0以上且3.5 / 1.0以下; 金属氧化物粒子选自由掺杂有磷的氧化锡涂覆的氧化钛粒子，涂覆有掺杂钨的氧化锡的二氧化钛粒子，以及掺杂有氟的氧化锡涂覆的氧化钛粒子。
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5.发明申请公开(公告)号：US20140134525A1
公开(公告)日：2014-05-15
申请号：US14077526
申请日：2013-11-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Anezaki , Kazuhisa Shida , Masashi Nishi , Hirofumi Kumoi , Daisuke Tanaka , Kazumichi Sugiyama
CPC classification number: G03G5/078 , G03G5/051 , G03G5/0514 , G03G5/0517 , G03G5/056 , G03G5/0564 , G03G5/0571 , G03G5/0578 , G03G5/14708 , G03G5/14752 , G03G5/14756 , G03G5/14765 , G03G5/14773 , G03G21/18
Abstract: A surface layer of an electrophotographic photosensitive member contains (α) a particular siloxane-modified resin, (β) a particular compound, and a charge transporting substance. (β) is at least one compound selected from the group consisting of hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, and sulfolane.
Abstract translation: 电子照相感光构件的表面层含有（α）特定的硅氧烷改性树脂，（特定的）化合物和电荷输送物质。 （bgr）是选自己醇，庚醇，环己醇，苄醇，乙二醇，1,4-丁二醇，1,5-戊二醇，二甘醇，二甘醇乙基甲基醚，碳酸亚乙酯中的至少一种化合物 ，碳酸丙烯酯，硝基苯，吡咯烷酮，N-甲基吡咯烷酮，苯甲酸甲酯，苯甲酸乙酯，乙酸苄酯，3-乙氧基丙酸乙酯，苯乙酮，水杨酸甲酯，邻苯二甲酸二甲酯和环丁砜。
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Patent Agency Ranking
公开(公告)号：US11366402B2
公开(公告)日：2022-06-21
申请号：US17070054
申请日：2020-10-14
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuka Ishiduka , Tsutomu Nishida , Hideharu Shimozawa , Nobuhiro Nakamura , Hiroyuki Watanabe , Kenichi Kaku , Kazuhiro Yamauchi , Yuichi Kikuchi , Kazuhisa Shida , Atsushi Okuda
Abstract: There is provided a process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge including an electrophotographic photosensitive member and a charging member, wherein an outer surface of the charging member is composed of at least a matrix and at least a part of domains, a volume resistivity of the matrix is 1.0×105 times or more of a volume resistivity of the domain, an average value Sd of circle equivalent diameters of the domains observed on the outer surface of the charging member is in a predetermined range, the electrophotographic photosensitive member contains a support, a photosensitive layer, and a protective layer in this order and when a surface roughness of the protective layer is measured, each of a protruding valley portion Rvk, a load length ratio Mr2, and Sd/Rvk is in a predetermined range.
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公开(公告)号：US20170261886A1
公开(公告)日：2017-09-14
申请号：US15456992
申请日：2017-03-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuta Isobe , Kazuhisa Shida , Takayuki Kanazawa , Shunsuke Mizukoshi
IPC: G03G15/08
CPC classification number: G03G15/0881 , G03G15/0882
Abstract: A developer container includes a container, provided with an opening and configured to accommodate a developer; a sealing member configured to cover the opening; and an unsealing member configured to unseal the opening by moving the sealing member. The sealing member opposes the container at a central opposing portion positioned in a central side and at an end opposing portion positioned at an end side with respect to a longitudinal direction of the unsealing member. The sealing member and the container are bonded to each other at bonding portion which is at least a part of the central opposing portion. The bonding force at the bonding portion of the central opposing portion is larger than a bonding force between the sealing member and the container at the end opposing portion.
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8.发明授权公开(公告)号：US09229342B2
公开(公告)日：2016-01-05
申请号：US14077526
申请日：2013-11-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Anezaki , Kazuhisa Shida , Masashi Nishi , Hirofumi Kumoi , Daisuke Tanaka , Kazumichi Sugiyama
CPC classification number: G03G5/078 , G03G5/051 , G03G5/0514 , G03G5/0517 , G03G5/056 , G03G5/0564 , G03G5/0571 , G03G5/0578 , G03G5/14708 , G03G5/14752 , G03G5/14756 , G03G5/14765 , G03G5/14773 , G03G21/18
Abstract: A surface layer of an electrophotographic photosensitive member contains (α) a particular siloxane-modified resin, (β) a particular compound, and a charge transporting substance. (β) is at least one compound selected from the group consisting of hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, and sulfolane.
Abstract translation: 电子照相感光构件的表面层含有（α）特定的硅氧烷改性树脂，（特定的）化合物和电荷输送物质。 （bgr）是选自己醇，庚醇，环己醇，苄醇，乙二醇，1,4-丁二醇，1,5-戊二醇，二甘醇，二甘醇乙基甲基醚，碳酸亚乙酯中的至少一种化合物 ，碳酸丙烯酯，硝基苯，吡咯烷酮，N-甲基吡咯烷酮，苯甲酸甲酯，苯甲酸乙酯，乙酸苄酯，3-乙氧基丙酸乙酯，苯乙酮，水杨酸甲酯，邻苯二甲酸二甲酯和环丁砜。
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公开(公告)号：US20150086921A1
公开(公告)日：2015-03-26
申请号：US14396350
申请日：2013-06-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Fujii , Hideaki Matsuoka , Haruyuki Tsuji , Nobuhiro Nakamura , Kazuhisa Shida
IPC: G03G5/08
CPC classification number: G03G5/08 , G03G5/0525 , G03G5/104 , G03G5/144
Abstract: A method for producing an electrophotographic photosensitive member in which leakage hardly occurs is provided. For this, in the method for producing an electrophotographic photosensitive member according to the present invention, a coating liquid for a conductive layer is prepared using a solvent, a binder material, and a metallic oxide particle having a water content of not less than 1.0% by mass and not more than 2.0% by mass; using the coating liquid for a conductive layer, a conductive layer having a volume resistivity of not less than 1.0×108 Ω·cm and not more than 5.0×1012 Ω·cm is formed; the mass ratio (P/B) of the metallic oxide particle (P) to the binder material (B) in the coating liquid for a conductive layer is not less than 1.5/1.0 and not more than 3.5/1.0; and the metallic oxide particle is selected from the group consisting of a titanium oxide particle coated with tin oxide doped with phosphorus, a titanium oxide particle coated with tin oxide doped with tungsten, and a titanium oxide particle coated with tin oxide doped with fluorine.
Abstract translation: 提供了几乎不发生泄漏的电子照相感光构件的制造方法。 为此，在本发明的电子照相感光体的制造方法中，使用溶剂，粘合剂材料和含水率为1.0％以上的金属氧化物粒子制备导电层用涂布液， 以质量％计不超过2.0质量％ 使用涂布液作为导电层，形成体积电阻率不小于1.0×10 8Ω·cm·cm且不大于5.0×10 12Ω·cm·cm的导电层; 导电层用涂布液中的金属氧化物粒子（P）与粘合剂材料（B）的质量比（P / B）为1.5 / 1.0以上且3.5 / 1.0以下; 金属氧化物粒子选自由掺杂有磷的氧化锡涂覆的氧化钛粒子，涂覆有掺杂钨的氧化锡的二氧化钛粒子，以及掺杂有氟的氧化锡涂覆的氧化钛粒子。
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公开(公告)号：US20210116833A1
公开(公告)日：2021-04-22
申请号：US17070054
申请日：2020-10-14
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuka Ishiduka , Tsutomu Nishida , Hideharu Shimozawa , Nobuhiro Nakamura , Hiroyuki Watanabe , Kenichi Kaku , Kazuhiro Yamauchi , Yuichi Kikuchi , Kazuhisa Shida , Atsushi Okuda
Abstract: There is provided a process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge including an electrophotographic photosensitive member and a charging member, wherein an outer surface of the charging member is composed of at least a matrix and at least a part of domains, a volume resistivity of the matrix is 1.0×105 times or more of a volume resistivity of the domain, an average value Sd of circle equivalent diameters of the domains observed on the outer surface of the charging member is in a predetermined range, the electrophotographic photosensitive member contains a support, a photosensitive layer, and a protective layer in this order and when a surface roughness of the protective layer is measured, each of a protruding valley portion Rvk, a load length ratio Mr2, and Sd/Rvk is in a predetermined range.
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