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公开(公告)号：US20190018331A1
公开(公告)日：2019-01-17
申请号：US16131566
申请日：2018-09-14
申请人： Mariko Takii , Koichi Sakata , Tohru Suganuma , Masahiro Seki , Masashi Nagayama , Shinya Nakagawa , Kei Niwayama
发明人： Mariko Takii , Koichi Sakata , Tohru Suganuma , Masahiro Seki , Masashi Nagayama , Shinya Nakagawa , Kei Niwayama
CPC分类号： G03G9/1139 , G03G9/08755 , G03G9/1075 , G03G9/1133 , G03G9/1136 , G03G15/0867
摘要： Provided is a carrier for a developer of an electrostatic latent image, the carrier including a core particle, and a resin layer covering the core particle, where the resin layer includes metal compound particles, wherein the metal compound particles include magnesium compound particles or barium compound particles, and an exposed amount B (atomic %) of the magnesium or the barium on a surface of the carrier particle satisfies a relationship below: 10.0≥B≥1.2.
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2.发明申请公开(公告)号：US20200319571A1
公开(公告)日：2020-10-08
申请号：US16835385
申请日：2020-03-31
申请人： Kento TAKEUCHI , Yutaka MAKIBE , Kenichi MASHIKO , Masato TAIKOJI , Kei NIWAYAMA
发明人： Kento TAKEUCHI , Yutaka MAKIBE , Kenichi MASHIKO , Masato TAIKOJI , Kei NIWAYAMA
摘要： An electrophotographic developer is provided. The electrophotographic developer comprises a toner and a carrier. The toner contains alumina particles. The carrier comprises a core particle and a resin layer coating a surface of the core particle. The carrier has a volume average particle diameter (Dv) of from 45 to 70 μm and a bulk density of from 2.1 to 2.5 g/cm3.
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3.发明申请公开(公告)号：US20180113393A1
公开(公告)日：2018-04-26
申请号：US15730795
申请日：2017-10-12
申请人： Masahiro SEKI , Hiroyuki Kishida , Haruki Murata , Shinya Nakagawa , Kei Niwayama , Saori Yamada , Kohsuke Miyazaki
发明人： Masahiro SEKI , Hiroyuki Kishida , Haruki Murata , Shinya Nakagawa , Kei Niwayama , Saori Yamada , Kohsuke Miyazaki
CPC分类号： G03G9/1131 , G03G9/1075 , G03G9/1132 , G03G9/1139 , G03G15/0806
摘要： A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m2/g through 1.90 m2/g, C−F Formula 1 where C is a BET specific surface area (m2/g) of the carrier and F is a BET specific surface area (m2/g) of the core particles.
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公开(公告)号：US20230384704A1
公开(公告)日：2023-11-30
申请号：US18323377
申请日：2023-05-24
申请人： Kei Niwayama , Masayuki Ishii
发明人： Kei Niwayama , Masayuki Ishii
CPC分类号： G03G9/09775 , G03G15/0865 , G03G9/0819
摘要： A toner contains mother toner particles each containing a binder resin, a releasing agent, and a charge control agent and an external additive containing hydrophobized polymethylsilsesquioxane particles with an average particle diameter of from 0.050 to 0.150 μm, wherein the mother toner particles have an average circularity of 0.95 or less.
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公开(公告)号：US10031434B2
公开(公告)日：2018-07-24
申请号：US15160590
申请日：2016-05-20
申请人： Mariko Takii , Yoshihiro Murasawa , Takahiro Nakamura , Kei Niwayama , Haruki Murata , Masato Taikoji , Koichi Sakata
发明人： Mariko Takii , Yoshihiro Murasawa , Takahiro Nakamura , Kei Niwayama , Haruki Murata , Masato Taikoji , Koichi Sakata
摘要： A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
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公开(公告)号：US20170185000A1
公开(公告)日：2017-06-29
申请号：US15392482
申请日：2016-12-28
申请人： Masashi NAGAYAMA , Mariko TAKll , Yoshihiro MURASAWA , Haruki MURATA , Kei NIWAYAMA , Tohru SUGANUMA , Koichi SAKATA , Saori YAMADA , Shinya NAKAGAWA , Kohsuke MIYAZAKI
发明人： Masashi NAGAYAMA , Mariko TAKll , Yoshihiro MURASAWA , Haruki MURATA , Kei NIWAYAMA , Tohru SUGANUMA , Koichi SAKATA , Saori YAMADA , Shinya NAKAGAWA , Kohsuke MIYAZAKI
IPC分类号： G03G9/00
CPC分类号： G03G9/1139 , G03G9/0821 , G03G9/1131 , G03G15/0121 , G03G15/0865 , G03G2215/0129 , G03G2215/0132
摘要： Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 μm from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 Ω·cm or less.
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公开(公告)号：US20160363880A1
公开(公告)日：2016-12-15
申请号：US15160590
申请日：2016-05-20
申请人： Mariko TAKII , Yoshihiro MURASAWA , Takahiro NAKAMURA , Kei NIWAYAMA , Haruki MURATA , Masato TAIKOJI , Koichi SAKATA
发明人： Mariko TAKII , Yoshihiro MURASAWA , Takahiro NAKAMURA , Kei NIWAYAMA , Haruki MURATA , Masato TAIKOJI , Koichi SAKATA
IPC分类号： G03G9/00
CPC分类号： G03G9/1139 , G03G9/1075 , G03G9/1133 , G03G15/08
摘要： A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
摘要翻译： 载体包括包含Al和Sn的树脂层并覆盖载体的表面。 可检测量的Al为1.0〜12.1原子％，当将载体进行X射线光电子分光分析时，可检测量的Al与Sn的比例（Al / Sn）为2.0〜50.0（Al / Sn） XPS）分析。
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公开(公告)号：US10474051B2
公开(公告)日：2019-11-12
申请号：US16131566
申请日：2018-09-14
申请人： Mariko Takii , Koichi Sakata , Tohru Suganuma , Masahiro Seki , Masashi Nagayama , Shinya Nakagawa , Kei Niwayama
发明人： Mariko Takii , Koichi Sakata , Tohru Suganuma , Masahiro Seki , Masashi Nagayama , Shinya Nakagawa , Kei Niwayama
摘要： Provided is a carrier for a developer of an electrostatic latent image, the carrier including a core particle, and a resin layer covering the core particle, where the resin layer includes metal compound particles, wherein the metal compound particles include magnesium compound particles or barium compound particles, and an exposed amount B (atomic %) of the magnesium or the barium on a surface of the carrier particle satisfies a relationship below: 10.0≥B ≥1.2.
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9.发明授权公开(公告)号：US10254674B2
公开(公告)日：2019-04-09
申请号：US15730795
申请日：2017-10-12
申请人： Masahiro Seki , Hiroyuki Kishida , Haruki Murata , Shinya Nakagawa , Kei Niwayama , Saori Yamada , Kohsuke Miyazaki
发明人： Masahiro Seki , Hiroyuki Kishida , Haruki Murata , Shinya Nakagawa , Kei Niwayama , Saori Yamada , Kohsuke Miyazaki
摘要： A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m2/g through 1.90 m2/g, C−F Formula 1 where C is a BET specific surface area (m2/g) of the carrier and F is a BET specific surface area (m2/g) of the core particles.
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公开(公告)号：US10025214B2
公开(公告)日：2018-07-17
申请号：US15392482
申请日：2016-12-28
申请人： Masashi Nagayama , Mariko Takii , Yoshihiro Murasawa , Haruki Murata , Kei Niwayama , Tohru Suganuma , Koichi Sakata , Saori Yamada , Shinya Nakagawa , Kohsuke Miyazaki
发明人： Masashi Nagayama , Mariko Takii , Yoshihiro Murasawa , Haruki Murata , Kei Niwayama , Tohru Suganuma , Koichi Sakata , Saori Yamada , Shinya Nakagawa , Kohsuke Miyazaki
摘要： Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 μm from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 Ω·cm or less.
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