公开(公告)号：US20240302763A1

公开(公告)日：2024-09-12

申请号：US18586597

申请日：2024-02-26

Applicant: Minoru MASUDA ,  Masashi NAGAYAMA ,  Tohru SUGANUMA ,  Kento TAKEUCHI ,  Tomomi SUZUKI

Inventor： Minoru MASUDA ,  Masashi NAGAYAMA ,  Tohru SUGANUMA ,  Kento TAKEUCHI ,  Tomomi SUZUKI

IPC: G03G9/113 ,  G03G15/095

CPC classification number: G03G9/1139 ,  G03G15/095 ,  G03G2215/0607

Abstract: An image forming method is provided that includes: developing an electrostatic latent image formed on an image bearer, with use of a developer containing a carrier and toner, the carrier having a core material particle and a covering layer, the covering layer covering the core material particle and containing an antimony-containing particle; and supplying the carrier to the developer.

公开(公告)号：US11914312B2

公开(公告)日：2024-02-27

申请号：US17858537

申请日：2022-07-06

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Yuji Toyota ,  Yasuhiro Tauchi

IPC: G03G15/09 ,  G03G15/08 ,  G03G9/113

CPC classification number: G03G15/0928 ,  G03G9/1136 ,  G03G9/1139 ,  G03G15/0812 ,  G03G2215/0609

Abstract: A developing device includes a developing container storing a two-component developer containing a magnetic carrier and a toner, a developer carrying member carrying the developer on its outer circumferential surface, and a regulation member arranged to be opposed at a prescribed distance to the developer carrying member. The developer carrying member includes a developing sleeve on which a magnetic brush is formed, and a magnet secured in the developing sleeve and having a plurality of magnetic poles including a regulation pole opposed to the regulation member and a downstream-side magnetic pole arranged downstream of the regulation pole with respect to the rotation direction of the developing sleeve. The magnet is such that the vertical magnetic force gradient [mT/°] has a local minimum value near a position at which the vertical magnetic force is 0 [mT] between the downstream-side surface of the regulation member and the downstream-side magnetic pole.

公开(公告)号：US20180329331A1

公开(公告)日：2018-11-15

申请号：US15973678

申请日：2018-05-08

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yusuke KURANO

IPC: G03G9/113

CPC classification number: G03G9/1134 ,  G03G9/1075 ,  G03G9/1133 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1139

Abstract: Carrier particles each include a carrier core having recesses in a surface thereof, and first and second coat layers covering the surface of the carrier core. The first and second coat layers are in a multi-layer structure in which the first coat layer and the second coat layer cover the surface of the carrier core in the stated order. The first coat layer entirely covers the surface of the carrier core. The second coat layer selectively covers regions of a surface of the first coat layer that correspond to the recesses in the surface of the carrier core. The first coat layer contains a first resin. The second coat layer contains a second resin. The second coat layer has a lower electric resistance than the first coat layer.

公开(公告)号：US20180275543A1

公开(公告)日：2018-09-27

申请号：US15892998

申请日：2018-02-09

Applicant: FUJI XEROX CO., LTD.

Inventor： Kotaro YOSHIHARA ,  Daisuke ISHIZUKA ,  Narumasa SATO ,  Yuka KAWAMOTO ,  Erina SAITO ,  Takahisa TATEKAWA ,  Noriyuki MIZUTANI

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/093 ,  G03G15/08 ,  G03G21/18

CPC classification number: G03G9/0825 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/09321 ,  G03G9/09328 ,  G03G9/09364 ,  G03G9/09371 ,  G03G9/09716 ,  G03G9/09725 ,  G03G9/1075 ,  G03G9/1133 ,  G03G9/1139 ,  G03G15/0865 ,  G03G21/1814

Abstract: An electrostatic charge image developer includes: a toner that includes toner particles which contain a polyester resin and a styrene (meth)acrylic resin and form a sea-island structure which includes a sea portion containing the polyester resin and an island portion containing the styrene (meth)acrylic resin on a surface of the toner particle, and has an exposure rate of the styrene (meth)acrylic resin in a range of from about 5 atom % to about 20 atom %; and an external additive, and a carrier whose fluidity and bulk density under environment of a temperature of 25° C. and a humidity of 50% satisfy Expression: 65.0≤fluidity×bulk density≤72.5.

公开(公告)号：US20180267421A1

公开(公告)日：2018-09-20

申请号：US15911443

申请日：2018-03-05

Applicant: Mariko TAKII ,  Koichi SAKATA ,  Tohru SUGANUMA ,  Masahiro SEKI ,  Masashi NAGAYAMA ,  Toyoaki TANO ,  Kohsuke MIYAZAKI

Inventor： Mariko TAKII ,  Koichi SAKATA ,  Tohru SUGANUMA ,  Masahiro SEKI ,  Masashi NAGAYAMA ,  Toyoaki TANO ,  Kohsuke MIYAZAKI

IPC: G03G9/00 ,  G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1075 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1139 ,  G03G15/08 ,  G03G15/0853 ,  G03G15/556

Abstract: A carrier is provided including a core particle and a resin layer coating the surface of the core particle. The resin layer includes fine metal particles, and a detected metal element amount A obtained by X-ray photoelectron spectrometry of the surface of the carrier is in a range of 4.0 atomic %≤A≤20.0 atomic % and an average major-axis length B of the fine metal particle exposing from the resin layer is in a range of 100 nm≤B≤800 nm.

公开(公告)号：US20180120724A1

公开(公告)日：2018-05-03

申请号：US15568947

申请日：2016-04-28

Applicant: Koichi SAKATA ,  Tohru SUGANUMA ,  Shohichi SUGIMOTO ,  Hiroshi TOHMATSU ,  Hiroyuki KISHIDA ,  Kenichi MASHIKO ,  Toyoaki TANO

Inventor： Koichi SAKATA ,  Tohru SUGANUMA ,  Shohichi SUGIMOTO ,  Hiroshi TOHMATSU ,  Hiroyuki KISHIDA ,  Kenichi MASHIKO ,  Toyoaki TANO

IPC: G03G9/113

CPC classification number: G03G9/1139 ,  G03G9/1136 ,  G03G9/1137

Abstract: A carrier including a resin layer including at least one kind of particles, wherein the at least one kind of the particles are particles of barium sulfate, wherein an amount of Ba detected is 0.3 atomic % or greater in a Ba analysis through X-ray photo-electron spectroscopy (XPS) of the carrier, and wherein circle-equivalent diameters of the particles of the barium sulfate are 400 nm or greater but 900 nm or smaller.

公开(公告)号：US20180113393A1

公开(公告)日：2018-04-26

申请号：US15730795

申请日：2017-10-12

Applicant: Masahiro SEKI ,  Hiroyuki Kishida ,  Haruki Murata ,  Shinya Nakagawa ,  Kei Niwayama ,  Saori Yamada ,  Kohsuke Miyazaki

Inventor： Masahiro SEKI ,  Hiroyuki Kishida ,  Haruki Murata ,  Shinya Nakagawa ,  Kei Niwayama ,  Saori Yamada ,  Kohsuke Miyazaki

IPC: G03G9/113 ,  G03G9/107

CPC classification number: G03G9/1131 ,  G03G9/1075 ,  G03G9/1132 ,  G03G9/1139 ,  G03G15/0806

Abstract: 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.

公开(公告)号：US09946177B2

公开(公告)日：2018-04-17

申请号：US15397522

申请日：2017-01-03

Applicant: Yoshihiro Murasawa ,  Koichi Sakata ,  Masashi Nagayama ,  Toyoaki Tano ,  Hiroyuki Kishida

Inventor： Yoshihiro Murasawa ,  Koichi Sakata ,  Masashi Nagayama ,  Toyoaki Tano ,  Hiroyuki Kishida

IPC: G03G9/113 ,  G03G9/083 ,  G03G15/08

CPC classification number: G03G9/0831 ,  G03G9/1075 ,  G03G9/1136 ,  G03G9/1137 ,  G03G9/1139 ,  G03G15/08 ,  G03G15/0808 ,  G03G2215/0607

Abstract: A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.

公开(公告)号：US20180008966A1

公开(公告)日：2018-01-11

申请号：US15544665

申请日：2016-01-26

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA ,  Takao SUGIURA

IPC: B01J23/889 ,  B01J23/89 ,  B01J35/00 ,  B01J35/02

CPC classification number: B01J23/8892 ,  B01J23/002 ,  B01J23/005 ,  B01J23/745 ,  B01J23/889 ,  B01J23/89 ,  B01J23/8906 ,  B01J23/8913 ,  B01J23/892 ,  B01J23/8926 ,  B01J23/8986 ,  B01J32/00 ,  B01J35/0006 ,  B01J35/0013 ,  B01J35/002 ,  B01J35/0026 ,  B01J35/0033 ,  B01J35/004 ,  B01J35/008 ,  B01J35/023 ,  B01J35/08 ,  B01J35/1009 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/0063 ,  B01J37/0211 ,  B01J37/088 ,  B01J37/16 ,  B01J2523/00 ,  C01G23/047 ,  C01G49/0072 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  G03G9/107 ,  G03G9/113 ,  G03G9/1139 ,  B01J2523/22 ,  B01J2523/24 ,  B01J2523/47 ,  B01J2523/72 ,  B01J2523/842 ,  B01J2523/19 ,  B01J2523/18 ,  B01J2523/17 ,  B01J2523/828 ,  B01J2523/822 ,  B01J2523/821 ,  B01J2523/824 ,  B01J2523/847 ,  B01J2523/845

Abstract: An object of the present invention is to provide ferrite particles for supporting a catalyst having a small apparent density, various properties are maintained in a controllable state and a specified volume is filled with a small weight, and a catalyst using the ferrite particles for supporting a catalyst. To achieve the object, ferrite particles for supporting a catalyst provided with an outer shell structure containing Ti oxide, a catalyst using the ferrite particles for supporting a catalyst are employed.

公开(公告)号：US20170227861A1

公开(公告)日：2017-08-10

申请号：US15225526

申请日：2016-08-01

Applicant: FUJI XEROX CO., LTD.

Inventor： Yuka ZENITANI ,  Hiroyoshi OKUNO ,  Satoshi INOUE ,  Yoshifumi IIDA ,  Tomohito NAKAJIMA ,  Yoshifumi ERI ,  Takeshi IWANAGA ,  Sakae TAKEUCHI ,  Shunsuke NOZAKI ,  Yasuo KADOKURA ,  Yasuhisa MOROOKA

IPC: G03G9/00

CPC classification number: G03G9/0819 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09716 ,  G03G9/09725 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1139 ,  G03G15/08 ,  G03G15/0865 ,  G03G2215/0132

Abstract: An electrostatic image developing toner contains: toner particles, first silica particles having an average equivalent circle diameter of 10 nm to 120 nm and second silica particles having a compressive agglomeration degree of 60% to 95%, a particle compression ratio of 0.20 to 0.40 and an average equivalent circle diameter being greater than the average equivalent circle diameter of the first silica particles.