Carrier Core Coating Patents (Class 430/137.13)
  • Patent number: 11029618
    Abstract: There is provided a carrier including a magnetic core material having a surface coated with a surfactant-containing resin mixture of an elemental fluorine-containing resin and a polyimide resin. The carrier has an elution amount of an eluted material into water in an elution test ranging from 180 ppm to 3,500 ppm.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: June 8, 2021
    Assignee: POWDERTECH CO., LTD.
    Inventors: Aya Sakuta, Makoto Ishikawa, Hiroki Sawamoto, Tetsuya Uemura
  • Patent number: 10913665
    Abstract: A filtering medium for removing the content of contaminants in fluids, wherein said filtering medium includes an acid-washed iron-based powder, wherein the acid-washed iron-based powder is formed by washing an iron-based powder in HCl, wherein the BET surface area of the acid-washed iron-based powder is at least 1.2 m2/g, wherein the acid-washed iron-based powder has a Fe content of at least 90% by weight. And, a method for reducing the content of contaminants in fluids including the steps of: a) providing the filtering medium, b) bringing one or more contaminated fluid(s) in contact with the filtering medium to reduce the content of contaminants in said one or more fluid(s), c) optionally removing the filtering medium from the one or more fluid(s) with a reduced content of contaminants.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: February 9, 2021
    Assignee: HÖGANÄS AB (PUBL)
    Inventors: Hyunshik Chang, Madan Tandukar, Paul Endler
  • Patent number: 10310396
    Abstract: A first aspect is a toner production method in which an organosilicon compound is condensed in a surfactant-containing aqueous medium with a specific surface tension, in which a resin particle is dispersed, to produce a toner having the condensate of the organosilicon compound on the surface of the resin particle, and a second aspect is a toner production method in which an organosilicon compound is condensed in an aqueous medium which has a surfactant and a specific metal salt and in which a resin particle is dispersed, to produce a toner having the condensate of the organosilicon compound on the surface of the resin particle.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 4, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kamikura, Kunihiko Nakamura, Maho Tanaka, Fumiya Hatakeyama
  • Patent number: 10217983
    Abstract: Disclosed are a cross-linked compound particle and a secondary battery including the same. More particularly, a compound particle which includes a monomer and a polymerization initiator, as a core and a film including a material disappeared at predetermined temperature as a shell is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: February 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Seok Koo Kim, Eun Ju Lee, Bokkyu Choi, Sei Woon Oh, Je Young Kim
  • Patent number: 9170511
    Abstract: Toner contains a binder resin containing one or more kinds of crystalline resin and one or more kinds of non-crystalline resin. The non-crystalline resin located at the surface portion of the toner forms a shell structure of a continuous phase of the non-crystalline resin and the toner has an amount of melting heat of 30 J/g or more in a second temperature rising as measured by differential scanning calorimetry (DSC).
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: October 27, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuru Moritani, Yoshihiro Moriya, Hiroshi Yamada, Ryota Inoue, Shinya Nakayama, Atsushi Yamamoto
  • Publication number: 20150140488
    Abstract: An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 21, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Kohei TERASAKI
  • Publication number: 20150140486
    Abstract: A toner includes a plurality of toner particles that each include a toner mother particle and an external additive adhering to a surface of the toner mother particle. The toner mother particle includes a core and a shell layer disposed over a surface of the core. The external additive contains silica particles. The toner mother particle has a hydrophobicity of at least 0% and less than 20%. The external additive has a hydrophobicity of at least 5% and no greater than 20%. The hydrophobicity of the toner mother particle is less than the hydrophobicity of the external additive.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masashi TAMAGAKI, Tomoyuki OGAWA
  • Publication number: 20150118615
    Abstract: A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masami TSUJIHIRO, Ryotaro KOMADA
  • Publication number: 20150118612
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core containing a binder resin and a shell layer on a surface of the toner core. The shell layer includes a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The inorganic particles intervene in an interface between the toner core and the shell layer. The inorganic particles have a number average particle diameter of 60 nm or more and 250 nm or less. Protrusions having a shape that follows a shape of the inorganic particles are on surfaces of the toner particles.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Ken MAETANI
  • Patent number: 9017916
    Abstract: A process for making a latex emulsion including contacting a resin dissolved in a solvent with an absorbent glass that binds the solvent to produce a latex emulsion.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: April 28, 2015
    Assignee: Xerox Corporation
    Inventors: Shigeng Li, Eugene F Young
  • Publication number: 20150104744
    Abstract: A two-component developer of the present disclosure contains a carrier and toner particles. The carrier includes a carrier core, a first layer coating a surface of the carrier core, and a second layer coating a surface of the first layer. The first layer contains a fluorine-based resin, and the second layer contains a polyamide-imide resin and/or a melamine resin. The toner particles each include a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a thermosetting resin.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 16, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Yusuke KURANO, Hiroaki MORIYAMA
  • Publication number: 20150072281
    Abstract: An electrostatic latent image developing toner includes toner particles. Each toner particle includes a toner core containing a binder resin, a shell layer coating a surface of the toner core, and needle-like inorganic particulates. Each shell layer contains a thermosetting resin, and the inorganic particulates are present within the shell layer. The inorganic particulates have: an aspect ratio of 1.25 or more and 2.5 or less; and an average major diameter and an average minor diameter of 300 nm or less.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Seiji OKADA
  • Publication number: 20150044605
    Abstract: A developer of the present disclosure contains: toner particles each containing a binder resin and a magnetic powder; cross-linked polyester resin particles having a particle size of 2 ?m or more and 30 ?m or less; and an external additive. The toner particles and the cross-linked polyester resin particles are externally treated with the external additive in the same manner.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 12, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Akinori KOYAMA
  • Publication number: 20150030979
    Abstract: A method for producing a toner, includes the steps of: preparing a core having a zeta potential at pH 4 of ?5 mV or less; and forming a cationic shell layer on a surface of the core in a solution in which a material of the shell layer having miscibility with a solvent of 250% by mass or more and 1000% by mass or less is dissolved in the solvent.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 29, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Hidetoshi MIYAMOTO
  • Publication number: 20150010862
    Abstract: According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Patent number: 8927188
    Abstract: A method of producing a magnetic carrier, having a coating process step in which a surface of a magnetic carrier core is coated with particles of a resin composition by a mechanical impact force. The coating process step has a first coating process step of mixing, dispersing, and fixing the particles on the surface of the core, and a second coating process step, which is performed after the first coating process step, of carrying out a film-forming coating process on the particles. In the first and second coating process steps, the peripheral velocity of the outermost end of stirring members, the coating process time, the product temperature at the end of the coating process, and the glass-transition temperature of the resin component satisfy specific relationships.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Naka, Masayuki Hama, Kentaro Kamae, Koh Ishigami, Yoshinobu Baba, Hiroaki Kawakami, Yojiro Hotta, Satoshi Mita
  • Publication number: 20140272703
    Abstract: Core/shell toner particles are made to have a desired triboelectric charge through control of the glass transition temperature (Tg) of the shell polymer and/or the ratio of styrene and at least one monomer for forming the polymer of the shell. The polymer is introduced onto core particles to form a shell thereon via an aggregation process.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: XEROX CORPORATION
    Inventors: Padam K. ANGRA, Christopher M. WOLFE
  • Patent number: 8790857
    Abstract: Disclosed is a toner obtained by coating surfaces of core particles including at least a binder resin having a carboxyl group and a coloring agent with successive coatings of a water-soluble crosslinking agent capable of crosslinking with a carboxyl group and a water-soluble polymer having a carboxyl group, which have been successively applied on the core particles and crosslinked with each other. The thus-formed toner is provided with a good harmony of favorable fixability represented by a low lowest fixable temperature and favorable storage stability represented by little aggregation after standing at 50° C. for 8 hours.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 29, 2014
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Tsuyoshi Itou, Motonari Udo, Kazuhisa Takeda, Takayasu Aoki, Masahiro Ikuta, Takafumi Hara
  • Patent number: 8765350
    Abstract: A method of manufacturing toner carrier formed of a core and a cover thereon, including the steps of: coating the core with a liquid cover containing a solvent and a material for forming the cover on the core in a processing tank; heating the core and the cover by first microwave radiation to volatilize the solvent from the cover; and removing the solvent volatilized in the step of heating from the processing tank.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: July 1, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshikatsu Matsuda, Kousuke Suzuki, Yuuki Mizutani
  • Publication number: 20140178813
    Abstract: A method for manufacturing a fatty acid metal salt particle includes forming a coating layer including a fatty acid metal salt on a surface of a core material particle in supercritical carbon dioxide.
    Type: Application
    Filed: June 6, 2013
    Publication date: June 26, 2014
    Inventors: Hiroyoshi OKUNO, Junichi TOMONAGA, Takeshi IWANAGA, Shunsuke NOZAKI, Hideaki YOSHIKAWA
  • Patent number: 8735041
    Abstract: A method for producing a low density resin-coated carrier having a small resin amount to a carrier core material and having a uniform resin coating layer formed on the carrier core material is provided. A resin-coated carrier has a carrier core material and a resin coating layer formed on the surface of the carrier core material. The carrier core material has pores and an apparent density of 1.6 g/cm3 to 2.0 g/cm3 and a remanent magnetization of 10 emu/g of less. The resin coating layer is formed by a dry process of adhering resin particles to a surface of the carrier core material and applying heat and impact force to the resin particles. A volume average particle size of the resin particles is less than 1 ?m. A two-component developer containing the resin-coated carrier is charged in a developing device in an image forming apparatus, and an image is formed.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: May 27, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takanori Kamoto, Takayuki Yamanaka, Osamu Wada, Tadashi Iwamatsu, Nobuyuki Yoshioka
  • Patent number: 8728700
    Abstract: A reactor, which heats a slurry raw material including a solid component, including a reaction tube, wherein the slurry raw material is continuously fed from an end of the reaction tube relative to the central axial direction of the reaction tube so as to be flown toward another end of the reaction tube to be heated; and plural perforated plates arranged in the reaction tube so as to separate the inside of the reaction tube into plural compartments. The reactor satisfies the relations (½)·D??D<D?, and 0.2?S/D??5.0, wherein D represents the diameter of each of the perforated plates, D? represents the inner diameter of the reaction tube, and S represents the interval between any two adjacent perforated plates in the central axial direction of the reaction tube.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: May 20, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Junichi Watanabe, Kenichi Uehara
  • Patent number: 8722305
    Abstract: A method of preparing a carrier for electrophotography, including a core material and a coating material layer formed on the surface of the core material, including: coating the core material with the coating material; and burning the coating material with a high-frequency induction heater, wherein the core material has a saturated magnetization of from 40 to 95 Am2/kg.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: May 13, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masato Taikoji, Kousuke Suzuki, Shinichiro Yagi, Yuuki Mizutani
  • Patent number: 8709697
    Abstract: A method of manufacturing a toner including supplying a fluid containing a resin and a coloring agent to a retaining member including a film having multiple discharge orifices, discharging droplets of the fluid from the multiple discharge orifices at a speed of from 2 to 4 m/s by applying a pulse voltage having a trapezoid waveform to a piezoelectric body having a surface provided substantially parallel to the film to move the surface in a direction away from the film relative to a reference position of the surface followed by holding the surface there for a predetermined time, and bringing the surface back to the reference position; and solidifying droplets of the fluid discharged from the multiple discharge orifices to form mother particles.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: April 29, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Norikane, Yohichiroh Watanabe, Masaru Ohgaki, Shinji Aoki, Yasutada Shitara, Andrew Mwaniki Mulwa
  • Publication number: 20140113227
    Abstract: An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10° C.?Ma-Mb?45° C.
    Type: Application
    Filed: June 6, 2013
    Publication date: April 24, 2014
    Inventors: Tomohiro SHINYA, Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO
  • Patent number: 8697326
    Abstract: A method of manufacturing a carrier including covering a core material with a covering material to form a covering layer on the core material and baking the covering material by heating the core material by high frequency induction applied thereto by a high frequency induction heating device.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: April 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kousuke Suzuki, Shinichiro Yagi, Masato Taikoji, Masanori Rimoto
  • Publication number: 20140080051
    Abstract: To provide a toner (X), which contains toner particles, each toner particle contains: a core phase (Q) containing a crystalline resin (A); and a shell phase (S) provided on a surface of the core phase (Q), where the shell phase (S) contains a crystalline polyurethane resin (B), wherein maximum peak temperature (Ta) of heat of melting of the crystalline resin (A) is 40° C. to 70° C., and maximum peak temperature (Tu) of heat of melting of the crystalline polyurethane resin (B) is 50° C. to 90° C.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Toyoshi SAWADA, Masahide YAMADA, Atsushi YAMAMOTO, Tatsuya MORITA, Satoyuki SEKIGUCHI, Keiji MAKABE, Kousuke NAGATA
  • Patent number: 8647804
    Abstract: A method of preparing carrier for electrophotography, which includes a core material and a coating material layer formed on the surface of the core material, including coating a coating material of the coating material layer on the core material; and burning the coating material by an induction heater, wherein the induction heater applies an alternative current to parallely-located plural coil circuits including a conductive wire including the shape of a coil to generate a magnetic line changing its direction and intensity for inductively heating the core material to heat the coating material.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Mizutani, Shinichiro Yagi, Kousuke Suzuki, Masato Taikoji
  • Publication number: 20140038098
    Abstract: A method of producing a magnetic carrier, having a coating process step in which a surface of a magnetic carrier core is coated with particles of a resin composition by a mechanical impact force. The coating process step has a first coating process step of mixing, dispersing, and fixing the particles on the surface of the core, and a second coating process step, which is performed after the first coating process step, of carrying out a film-forming coating process on the particles. In the first and second coating process steps, the peripheral velocity of the outermost end of stirring members, the coating process time, the product temperature at the end of the coating process, and the glass-transition temperature of the resin component satisfy specific relationships.
    Type: Application
    Filed: July 26, 2013
    Publication date: February 6, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Naka, Masayuki Hama, Kentaro Kamae, Koh Ishigami, Yoshinobu Baba, Hiroaki Kawakami, Yojiro Hotta, Satoshi Mita
  • Publication number: 20140030648
    Abstract: In a toner for electrostatic latent-image development that includes toner core particles including at least a binder resin, and shell layers with which the entire surfaces of the toner core particles are coated, an ethylene-unsaturated carboxylic acid copolymer is present at the interface between the toner core particle and the shell layer.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 30, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Hidetoshi Miyamoto
  • Patent number: 8628904
    Abstract: The present invention provides a carrier for replenishment including an associated particle in which single particles each having a core material and a resin layer covering the core material, are bound via the resin layer, the carrier being used in a developer for replenishment of a trickle development system, and the system including performing development while the developer for replenishment is replenished, upon development of a latent image on a latent image holding member using a development unit.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: January 14, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Moegi Iguchi, Satoshi Inoue, Koutarou Yoshihara, Masahiro Takagi
  • Patent number: 8597866
    Abstract: A method of producing a carrier for electrophotography includes: covering a surface of a core particle with a coating layer including resin particles and a crosslinking resin in an uncrosslinked state present in spaces between the resin particles; and applying a mechanical impact from the outer surface of the coating layer before crosslinking of the crosslinking resin.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: December 3, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Sakon Takahashi, Norihito Fukushima, Shunsuke Nozaki, Michio Take
  • Publication number: 20130316281
    Abstract: Disclosed are a toner and a preparation method thereof. The toner of the invention has honeycomb-shaped core-shell structured particles. The honeycomb-shaped core-shell structured particles comprise two or more core layers. Each core layer is completely covered by a shell layer.
    Type: Application
    Filed: May 31, 2011
    Publication date: November 28, 2013
    Applicant: ICMI (CHINA) LIMITED
    Inventors: Lanlan Cheng, Xiushan Zhang, Fugen Tang
  • Publication number: 20130302732
    Abstract: Provided is a method for producing core-shell structured resin particles, comprising the steps of: providing a dispersion liquid of hydrophobic resin particles in which the hydrophobic resin particles are dispersed into an aqueous medium containing an anionic surfactant A and an anionic surfactant B; providing a dispersion liquid of resin microparticles in which resin microparticles are dispersed into an aqueous medium; mixing the dispersion liquid of hydrophobic resin particles and the dispersion liquid of resin microparticles; adhering the resin microparticles to surfaces of the hydrophobic resin particles by adding a water soluble metal salt to a mixture resulting from above step, wherein the surfactant A and the surfactant B satisfy the specific conditions.
    Type: Application
    Filed: March 6, 2013
    Publication date: November 14, 2013
    Inventors: Hayato Ida, Takashi Hirasa, Ryo Natori, Junichi Tamura, Yuya Chimoto, Takaho Shibata
  • Publication number: 20130244168
    Abstract: A toner including a resin particle (C) is provided. The resin particle (C) includes a resin particle (B) and; a resin particle (A) or covering layer (P) that is adhered to a surface of the resin particle (B). The resin particle (B) includes a resin (b) having a polyhydroxycarboxylic acid skeleton. The resin particle (A) or covering layer (P) includes a resin (a). The resin (a) is a polyester resin having a polybasic acid unit and a polyol unit and has a weight average molecular weight within a range from 9,500 to 100,000.
    Type: Application
    Filed: February 6, 2013
    Publication date: September 19, 2013
    Inventors: Daiki YAMASHITA, Shinya Nakayama, Atsushi Yamamoto, Yukiko Nakajima, Akiyoshi Sabu, Yoshihiro Moriya, Hideyuki Santo
  • Publication number: 20130216274
    Abstract: A developer carrying member is provided which can maintain a high image quality over a long period of time even where a highly triboelectrically chargeable developer is used. The developer carrying member has a substrate and a surface layer. The surface layer is a cured product of a resin composition containing a binder resin, conductive particles, a quaternary phosphonium salt and an azo metal complex compound, the binder resin has in the molecular structure at least one structure selected from the group consisting of an —NH2 group, an ?NH group and an —NH— linkage, and the azo metal complex compound is a compound represented by the formula (1) as defined in the specification.
    Type: Application
    Filed: March 27, 2013
    Publication date: August 22, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Canon Kabushiki Kaisha
  • Publication number: 20130202998
    Abstract: The present invention provides a method for producing an aqueous dispersion of resin fine particles wherein the particle size of the obtained resin particles is small and the aqueous dispersion is excellent in productivity, the production method including: mixing a resin having an acid group, a betaine surfactant and a solvent capable of dissolving the resin having an acid group to obtain a mixture; and emulsifying the mixture by placing the mixture in an aqueous medium and by applying shear force to the mixture under a condition of pH=7.0 or more to obtain an emulsion.
    Type: Application
    Filed: December 21, 2012
    Publication date: August 8, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: CANON KABUSHIKI KAISHA
  • Publication number: 20130171558
    Abstract: It is an object of the present invention to provide a ferrite carrier core material and a ferrite carrier for an electrophotographic developer, which have an excellent charging property, hardly cause carrier scattering due to cracking and chipping of the core material, and have a prolonged life, and methods for manufacturing these, and an electrophotographic developer using the ferrite carrier. For this object, the ferrite carrier core material and a ferrite carrier for an electrophotographic developer, wherein (1) the ferrite composition contains 0.5 to 2.5% by weight of Sr, and the presence amount of Sr—Fe oxides satisfies a specific conditional expression, (2) the distribution in the number of the shape factor SF-2 is in a specific range, (3) the BET specific surface area is 0.15 to 0.30 m2/g, (4) the average particle diameter D50 is 20 to 35 ?m, and (5) the magnetization is 50 to 65 Am2/kg.
    Type: Application
    Filed: August 29, 2011
    Publication date: July 4, 2013
    Applicant: POWDERTECH CO., LTD.
    Inventors: Tomoyuki Suwa, Toru Iwata, Koji Aga
  • Publication number: 20130136848
    Abstract: A method of polymerising monomer to form polymer at the surface of particulate material, said method comprising: providing a dispersion of said particulate material in a continuous liquid phase, said dispersion comprising a RAFT agent as a stabiliser for said particulate material, and said continuous liquid phase comprising one or more ethylenically unsaturated monomers; and polymerising said one or more ethylenically unsaturated monomers under the control of said RAFT agent to thereby form polymer at the surface of said particulate material.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 30, 2013
    Applicant: The University Of Sydney
    Inventor: The University Of Sydney
  • Publication number: 20130137028
    Abstract: A method of manufacturing toner carrier formed of a core and a cover thereon, including the steps of: coating the core with a liquid cover containing a solvent and a material for forming the cover on the core in a processing tank; heating the core and the cover by first microwave radiation to volatilize the solvent from the cover; and removing the solvent volatilized in the step of heating from the processing tank.
    Type: Application
    Filed: November 8, 2012
    Publication date: May 30, 2013
    Inventors: Yoshikatsu Matsuda, Kousuke Suzuki, Yuuki Mizutani
  • Patent number: 8435715
    Abstract: Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pore apertures on a surface of the particle, and the method comprises steps of blocking the pore apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore apertures have been blocked, and mixing the resin coated carrier and the toner.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: May 7, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto, Takanari Kayamori, Junya Ueda
  • Patent number: 8399171
    Abstract: A manufacturing apparatus provided with a rotary stirring section and a powder passage is used to manufacture the resin-layer coated carrier. At a fine resin particle adhering step, a magnetic base particle and a fine resin particle are inputted into the powder passage with the rotary stirring section rotating and the fine resin particle is adhered onto the surface of the magnetic base particle. At a spraying step, at least a liquid that plasticizes the fine resin particles is sprayed with spray gas from a spraying section on the magnetic base particle and the fine resin particle which are in a fluidized state in the powder passage. At a film-forming step, rotation by the rotary stirring section is continued to fluidize the magnetic base particles and the fine resin particles until the fine resin particles adhered to the magnetic base particles are softened to form a film.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 19, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Hara, Yoshiaki Akazawa, Yoshitaka Kawase, Yoritaka Tsubaki, Yoshinori Mutoh, Keiichi Kikawa
  • Patent number: 8367293
    Abstract: A method for producing a carrier, including a step of periodically forming and discharging liquid droplets of a carrier core composition liquid from a plurality of nozzles formed in a thin film, using a liquid droplet forming unit having the thin film and a ring-shaped vibration generating unit disposed in a deformable area of the thin film so as to be along a circumference of the area and to vibrate the thin film, a step of forming carrier core particles by solidifying the discharged liquid droplets, and a step of coating the carrier core particles with a resin layer.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: February 5, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Ohtani, Ryota Inoue, Yoshihiro Norikane
  • Patent number: 8354214
    Abstract: The present disclosure provides carriers for use with toner compositions. In embodiments, a carrier may include a core, having a dry powder polymer coating. In embodiments, the coating may also include a colorant, such as carbon black. Processes for coating such carriers with the dry powder polymer coatings are also provided.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: January 15, 2013
    Assignee: Xerox Corporation
    Inventors: Daryl W. Vanbesien, Michael S. Hawkins, Suxia Yang, Richard P. N. Veregin, Karen Ann Moffat
  • Publication number: 20120322004
    Abstract: An electrostatic charge image developing carrier includes a core particle and a coating layer with which the surface of the core particle is coated. The coating layer includes an acrylic resin having a constituent unit in which a silicone chain is disposed in a branch.
    Type: Application
    Filed: October 27, 2011
    Publication date: December 20, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takeshi SHOJI, Toshiaki HASEGAWA
  • Patent number: 8329374
    Abstract: There is provided a method for producing a carrier, which includes depositing a resin coating layer on the surface of a magnetic material; adding a treatment agent for a conductor precursor to the resin coating layer so as to treat the resin coating layer with the treatment agent; and exposing the treatment agent-added resin coating layer to a conductor precursor in a supercritical or subcritical fluid so as to form a conductor in the resin coating layer.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: December 11, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Akihiro Kotsugai, Yoshihiro Moriya, Shingo Sakashita
  • Publication number: 20120308924
    Abstract: A process for adhering surface treatment to toner resin core particles includes: providing resin core particles including a binder polymer having a Tg and having outer surfaces; providing surface treatment including at least first metal oxide particles having an average particle size of greater than 25 nm and a surface energy of less than or equal to 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., and tacking the at least first metal oxide particles to the resin core particles by mixing at a temperature greater than the Tg of the binder polymer. Preferably, the surface treatment is tacked to the outer surfaces of the resin core particles at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area.
    Type: Application
    Filed: June 30, 2011
    Publication date: December 6, 2012
    Inventors: Kevin D. Lofftus, Peter S. Alexandrovich
  • Publication number: 20120288790
    Abstract: The present disclosure describes processes for making clear, high-gloss toners, including toner compositions resulting from such processes that find applications in overcoating and gloss enhancement.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 15, 2012
    Applicant: XEROX CORPORATION
    Inventors: Maura Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Robert D. Bayley, Dan Asarese
  • Patent number: 8298742
    Abstract: In a method for coating electrophotographic carrier core surfaces with a resin composition by rotating a rotator having a plurality of agitating blades on its surface in a casing; a coating treatment material that is introduced to a space defined between the rotator and the casing is in a packing of from 50% to 98% by volume; at the time of coating treatment, the electrophotographic carrier core surfaces are coat-treated with the resin composition while being put forward and put backward; and the electrophotographic carrier cores and the resin composition are, at the time of coating treatment, temperature-controlled at a specific temperature T (° C.) or below. This method enables the electrophotographic carrier core surfaces to be more uniformly coated with a coating resin.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: October 30, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Okamoto, Yoshinobu Baba, Koh Ishigami, Tomoko Endo
  • Patent number: 8293446
    Abstract: A resin-coated carrier is provided. A resin-coated carrier includes a carrier core and a resin coating layer formed on a surface of the carrier core. The carrier core is composed of a porous material having surface fine pores formed on a surface thereof, and has an apparent density of 1.6 to 2.0 g/cm3. The resin coating layer contains cross-linked fine resin particles. Additionally, the resin-coated carrier is configured such that a volume average particle size of the cross-linked fine resin particles contained in the resin coating layer and an area average diameter of the surface fine pores satisfy a predetermined relational expression.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: October 23, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Wada, Takanori Kamoto, Nobuyuki Yoshioka, Ayae Nagaoka, Tadashi Iwamatsu