By Coating Patents (Class 430/137.11)
  • Patent number: 9927728
    Abstract: Provided is a method for producing a toner particle including a step of condensing a raw slurry by using a decanter-type centrifugal separator, in an aqueous medium. The step of condensing the raw slurry is carried out under following conditions: a centrifugal force is at least 500 G and less than 4000 G and a temperature is at least Tg?10° C. and not more than Tg+10° C. And a ratio of a colored particles in condensed slurry is within a prescribed range.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: March 27, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Arimura, Yusuke Hasegawa, Tomohisa Sano, Yoshitaka Suzumura, Takuma Ikejiri, Shohei Yamashita
  • Patent number: 9915884
    Abstract: The toner of the present invention contains: a toner base particle, and a silica particle and a fatty acid metal salt particle adhering to a surface of the toner base particle. The toner base particle contains a crystalline polyester resin and an amorphous polyester resin. The toner particle has an average circularity of 0.945 to 0.965. The silica particle has a volume average particle size of 70 to 300 nm, and has an average circularity of 0.5 to 0.9. The fatty acid metal salt particle has a median diameter based on a volume of 0.50 to 2.00 ?m.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: March 13, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Satoshi Uchino, Shinya Obara, Futoshi Kadonome, Noriyuki Kimpara, Ikuko Sakurada, Takuya Takahashi
  • Patent number: 9874827
    Abstract: An electrostatic charge image developing toner includes a carbodiimide compound and a polyester resin prepared by subjecting an alcohol component and a carboxylic acid component to condensation polymerization, wherein the alcohol component includes an aliphatic polyol in an amount of 60 mol % to 100 mol %.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: January 23, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasushige Nakamura, Shinichi Yaoi, Asafumi Fujita, Seijiro Ishimaru
  • Patent number: 9753386
    Abstract: A positively chargeable toner contains plural toner particles each containing a core, and a shell layer disposed over the core. The shell layer contains a first resin containing at least one repeating unit having an amide group, and a second resin containing at least one repeating unit having a quaternary ammonium cation. The toner attains a charge amount Q3 after stirring for 3 minutes and attains a charge amount Q30 after stirring for 30 minutes, and “Q30?Q3” and “20 ?C/g?Q3” are both satisfied. Assuming that a second mixture of 100 parts by mass of the standard carrier and 10 parts by mass of the toner charged to a saturated charge amount is born on a development roller to measure a charge amount distribution, an arithmetic mean X and a standard deviation Y of the charge amount distribution satisfy “Y/X?3.5”.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: September 5, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 9740128
    Abstract: A positively chargeable toner for electrostatic latent image development includes toner particles. The toner particles each include a toner core containing boron nitride and a shell layer disposed over a surface of the toner core. The boron nitride is contained in an amount of no less than 0.05% by mass and no greater than 35% by mass relative to total mass of the toner core. The boron nitride has a thermal conductivity of no less than 40 W/m·K and no greater than 220 W/m·K.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 22, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Toshiki Takemori, Yukinori Nakayama, Masaki Okita, Hiroki Uemura, Takamichi Mori
  • Patent number: 9690223
    Abstract: A toner includes a plurality of toner particles each including a core and a shell layer residing on a surface of the core. The shell layer has a plurality of cavities each exposing the core. Each of the toner particles has a distribution of surface hardness, as measured by a scanning probe microscope in a state where no external additive adheres to the toner particle, satisfying that the surface hardness is at least 1.10 times a surface hardness Ss in at least 75% and no greater than 95% by area ratio of a surface of the toner particle, where Ss denotes the surface hardness at a location where the core is exposed through any of the cavities.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: June 27, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Noriaki Sakamoto, Takatoshi Nozaki
  • Patent number: 9562142
    Abstract: A process for making a crystalline latex suitable for use in a toner by phase inversion emulsification (PIE) where when resin of particular acid number is neutralized to a certain degree, smaller sized resin particles are obtained reproducibly.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: February 7, 2017
    Assignee: Xerox Corporation
    Inventors: Yanjia Zuo, Shigeng Li, Peter V Nguyen, Chieh-Min Cheng
  • Patent number: 9423708
    Abstract: A method for producing a toner particle having high charging stability and durability under environments at high temperature and high humidity is provided. A method for producing a toner particle including an step of adhering a resin particle to surface of a toner base particle containing a binder resin and a colorant in an aqueous medium, wherein the resin particle contain a resin having an ionic functional group and having an acid dissociation constant pKa of 6.0 or more and 9.0 or less, and the pH (hydrogen ion concentration) of the aqueous medium is equal to or greater than pKa of the resin particle?2.0.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: August 23, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tsuneyoshi Tominaga, Kunihiko Nakamura, Akane Masumoto
  • Patent number: 9188894
    Abstract: The method for manufacturing core-shell structure fine particles, includes adding metal salt into an aqueous medium containing shell particles A and core particles B to thereby attach the shell particles A to the surface of each of the core particles B and the toner contains the core-shell structure fine particles. (1) The zeta potential of the core particles B and the zeta potential of the shell particles A are the same polarity. (2) |Zeta potential of the core particles B when adding metal salt|<|Zeta potential of the shell particles A when adding metal salt| (3) (Median diameter based on the volume of the core particles B)>(Median diameter based on the volume of the shell particles A).
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: November 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hayato Ida, Takaho Shibata, Yuya Chimoto, Takashi Hirasa, Masayoshi Kato
  • Patent number: 9108364
    Abstract: A composite material includes a solid polymer matrix, a plurality of capsules and a liquid, in the capsules. The liquid includes from 50 to 100 wt % of a solvent, and from 0 to 50 wt % of a polymerizer. There is no polymerizer outside of the capsules. The solid polymer matrix may include a native activating moiety for the polymerizer. The solvent may have a swelling ratio with the solid polymer matrix of at least 1.1 and/or may have a polarity ET of from 0.10 to 0.50.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: August 18, 2015
    Assignee: Board of Trustees of the University of Illinois
    Inventors: Mary M. Caruso, David A. Delafuente, Benjamin J. Blaiszik, Jason M. Kamphaus, Nancy R. Sottos, Scott R. White, Jeffrey S. Moore
  • Patent number: 9081317
    Abstract: There is provided a positively chargeable toner including toner mother particles containing a binder resin having an ethylenically unsaturated bond, wherein the amine value of a component extracted with a water phase by the addition of ion exchanged water after mixing the toner with methyl ethyl ketone is from 600 to 1,250 and the weight average molecular weight of the component extracted with the water phase is from 1,000 to 200,000.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: July 14, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Atsushi Sugawara, Masanobu Ninomiya, Noriyuki Mizutani, Akira Matsumoto, Yusuke Ikeda, Satoshi Kamiwaki, Yukiaki Nakamura
  • Patent number: 9023573
    Abstract: A toner for electrostatic-charge image development contains toner particles in which the surfaces of core particles, including a binder resin composed of a polyester resin, are coated with shell layers. The shell layer is formed of a resin composed of a copolymer of monomers including a monomer having a quaternary ammonium group and a (meth)acrylic copolymer. The molar ratio of units derived from a monomer having a quaternary ammonium group is 5 mol % or more and 35 mol % or less.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: May 5, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Seiji Kikushima
  • Publication number: 20150118613
    Abstract: Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: XEROX CORPORATION
    Inventors: KIMBERLY D. NOSELLA, Guerino G. Sacripante, Edward G. Zwartz, Richard P.N. Veregin, Michael S. Hawkins, David J.W. Lawton
  • Publication number: 20150118610
    Abstract: Toners and processes useful in providing toners suitable for electrophotographic apparatuses, including apparatuses such as digital, image-on-image, and similar apparatuses. In particular, emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies and which comprise a base resin composed of both styrene-acrylate and polyester resins. These toner compositions further include polyaluminum chloride (PAC) instead of the more commonly used aluminum sulfate as the flocculant or aggregating agent.
    Type: Application
    Filed: January 22, 2014
    Publication date: April 30, 2015
    Applicant: XEROX CORPORATION
    Inventors: Kimberly D. Nosella, Guerino G. Sacripante, Richard P.N. Veregin, Edward G. Zwartz, David J.W. Lawton
  • Publication number: 20150118609
    Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.
    Type: Application
    Filed: January 6, 2015
    Publication date: April 30, 2015
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Publication number: 20150079517
    Abstract: A method for producing a toner includes: dissolving a thermoplastic resin and a thermosetting resin in an organic solvent; mixing the organic solvent containing the thermoplastic resin and the thermosetting resin with an aqueous medium, and micronizing the thermoplastic resin in a mixture obtained; and forming a film of the dissolved thermosetting resin on surfaces of fine particles formed through the micronization.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 19, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Seiji KIKUSHIMA
  • Patent number: 8980520
    Abstract: Toners are provided, which possess low melt properties capable of producing a low gloss finish. Methods for providing these resins and toners are also provided which include the process of controlling the gloss of the toner utilizing a slow acid addition during coalescence optionally combined with little or no chelating agent added during the aggregation process.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: March 17, 2015
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Daryl W. Vanbesien, Jordan H. Wosnick, Karen Ann Moffat
  • Publication number: 20150072282
    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 particulates having a higher hardness than the shell layer. Each shell layer contains a thermosetting resin, and the particulates are present within the shell layer. Preferably, the content of the particulates having a higher hardness than the shell layer is 0.1% by mass or more and 5.0% by mass or less with respect to a total amount of the toner particles.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Seiji OKADA
  • Publication number: 20150056551
    Abstract: A method of forming toner particles includes aggregating a mixture of a latex, a wax, and an optional pigment to form pre-toner particles, and coalescing the pre-toner particles at a substantially constant target temperature selected within a range from about the glass transition temperature of the pre-toner particles to about 75° C., thereby creating toner particles having a substantially constant particle size distribution during the coalescing step.
    Type: Application
    Filed: August 21, 2013
    Publication date: February 26, 2015
    Applicant: XEROX CORPORATION
    Inventors: Jay Lee Schneider, Abdisamed Sheik-Qasim, Randy Pheav Tin, Christopher Michael Wolfe, Richard Philip Nelson Veregin, Mark Elliott, Melanie Davis, Cuong Vong, Shigang Steven Qiu
  • Publication number: 20150037717
    Abstract: This invention provides a manufacturing method capable of manufacturing core-shall structure particles even when using fine particles manufactured under the conditions of substantially not using a solvent as shell particles and toner containing the fine particles. The method for manufacturing core-shell structure fine particles, includes adding metal salt into an aqueous medium containing shell particles A and core particles B to thereby attach the shell particles A to the surface of each of the core particles B and the toner contains the core-shell structure fine particles. (1) The zeta potential of the core particles B and the zeta potential of the shell particles A are the same polarity. (2) |Zeta potential of the core particles B when adding metal salt|<|Zeta potential of the shell particles A when adding metal salt| (3) (Median diameter based on the volume of the core particles B)>(Median diameter based on the volume of the shell particles A).
    Type: Application
    Filed: October 2, 2012
    Publication date: February 5, 2015
    Inventors: Hayato Ida, Takaho Shibata, Yuya Chimoto, Takashi Hirasa, Masayoshi Kato
  • 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
  • Patent number: 8940468
    Abstract: Disclosed is a process for production of a decolorable toner, including: aggregating dispersed fine particles of a color material comprising at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles comprising at least a binder resin comprising a polyester resin to form aggregates in an aqueous medium, adding a reactive polymer having an oxazoline group in to the aqueous medium, and fusing the aggregates in the aqueous medium. As a result, it becomes possible to produce a decolorable toner which suppresses the generation of fine powder due to the release of fine particles of an erasable color material from the toner.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: January 27, 2015
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Takafumi Hara, Tsuyoshi Itou, Masahiro Ikuta, Motonari Udo, Koji Shimokusa, Hiroshi Mizuhata
  • 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
  • Publication number: 20150004536
    Abstract: A toner composition with a novel surface additive package for developing images is provided. The additive package comprises a sol-gel silica, a PDMS silica, an HMDS silica, and an organic spacer such as PMMA, and melamine. The toner composition exhibits improved properties and are useful for high speed printing on Single Component Development systems.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: GRAZYNA E. KMIECIK-LAWRYNOWICZ, MAURA A. SWEENEY, DANIEL W. ASARESE, SAMIR KUMAR
  • Publication number: 20140370438
    Abstract: A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Inventors: Shigang Steven Qiu, Chieh-Min Cheng, Amy Grillo, Yulin Wang, Rashid Mahmood, David Kurceba
  • Publication number: 20140356778
    Abstract: A toner including a resin; an optional wax; and a colorant; wherein the colorant has disposed thereon a reactive component having at least one cross-linkable carbon-carbon double bond and wherein the tribo electric charge of the toner is adjusted through surface treatment of the colorant with the reactive component. Also a colorant having disposed thereon a reactive component having at least one cross-linkable carbon-carbon double bond, wherein the reactive component disposed on the colorant is selected from the group consisting of methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, stearyl methacrylate, acrylic acid, methacrylic acid, maleic acid, hydroxyethyl methacrylate, hydroxypropyl acrylate, glycidyl acrylate, alkoxymethylol acrylamide, styrene, vinyl toluene, methylstyrene, acrylonitrile, methacrylonitrile, bisphenol A glycerolate diacrylate, and mixtures and combinations thereof.
    Type: Application
    Filed: May 29, 2013
    Publication date: December 4, 2014
    Applicant: Xerox Corporation
    Inventors: Christopher Wolfe, Jay L. Schneider, Randy Pheav Tin, Chieh-Min Cheng
  • Publication number: 20140295345
    Abstract: An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Seishi OJIMA, Ryotaro KOMADA
  • Publication number: 20140272697
    Abstract: A method of making a toner composition includes preparing raw toner particles, increasing a surface area of the raw toner particles by contacting the raw toner particles with a base to produce base-treated raw toner particles, and mixing the base-treated raw toner particles with at least one surface additive such that the at least one surface additive attaches to a surface of the base-treated raw toner particles to obtain blended toner particles. A toner composition includes blended toner particles containing base-treated raw toner particles, and at least one surface additive attached to a surface of the base-treated raw toner particles, wherein a ratio of a triboelectric charge of the blended toner composition to a triboelectric charge of the base-treated raw toner particles is from about 0.8 to about 1.2.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: XEROX CORPORATION
    Inventors: Juan A. MORALES-TIRADO, Blaise LUZOLO
  • Publication number: 20140272701
    Abstract: A toner composition includes toner particles containing a resin; an optional wax; and an optional colorant, wherein the resin is a three latex system including a latex core, a latex shell, and a latex gel; and a glass transition temperature Tg of the latex core is lower than a glass transition temperature Tg of the latex shell.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Maura A. SWEENEY, Daniel W. ASARESE, Robert D. BAYLEY
  • Publication number: 20140242509
    Abstract: An electrostatic latent image developing toner containing a plurality of toner particles, each including a binder resin and a release agent, is provided. The surface hardness of the toner particle, measured by a nanoindentation method, satisfies the following conditions (1) and (2): (1) The surface hardness of the toner particle attained with a displacement of 10 nm is 1 GPa or more and 3 GPa or less; and (2) the surface hardness of the toner particle attained with a displacement of 100 nm is 1 GPa or less.
    Type: Application
    Filed: February 26, 2014
    Publication date: August 28, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Yoichiro WATANABE
  • Publication number: 20140199623
    Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Patent number: 8748073
    Abstract: A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), R1 represents a hydrogen atom, a methyl group, or an ethyl group, R2 represents an aliphatic hydrocarbon which may be branched, or an aromatic hydrocarbon, and R3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: June 10, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroshi Nagasawa, Ken Ohmura
  • Patent number: 8741517
    Abstract: A toner includes a binder including two different weight molecular weight resins, a colorant, and a releasing agent, wherein a gel permeation chromatogram (GPC) molecular weight distribution curve of the toner has a major peak (Mp) present in a range of about 1.0×104 to about 3.0×104 g/mol and a shoulder curve starting at 1.0×105 g/mol or more, and a storage modulus (G?) curve of the toner with respect to temperature has Ts, which is a temperature at which a storage modulus value begins to decrease, in a temperature range of about 50 to about 67° C.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: June 3, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeong Pang, Jun-young Lee, Tae-hoe Koo, Su-bum Park, Ju-yeon Lee
  • Patent number: 8735033
    Abstract: A process for making emulsion aggregation (EA) toners is provided. In embodiments, the process comprises aggregating a mixture comprising a latex resin, and at least one colorant in a reactor to form aggregated toner particles, adding a shell resin to form a shell over the aggregated toner particles, coalescing the aggregated toner particles, and recovering the toner particles.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: May 27, 2014
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Kimberly Nosella, David Kurceba, Santiago Faucher
  • Patent number: 8722304
    Abstract: A method for forming surface decorated particles including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, the invention provides a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: May 13, 2014
    Assignee: Eastman Kodak Company
    Inventors: Mridula Nair, David D. Putnam, Shari L. Eiff, Cumar Sreekumar
  • 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
  • Patent number: 8703374
    Abstract: Toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that cause protrusions from the toner particle surface.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: April 22, 2014
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Anne Marie Sweeney-Jones
  • Patent number: 8697327
    Abstract: A process for producing a core-shell toner is provided in which the toner has core particles containing at least a binder resin (1), a colorant and a release agent and shell layers which contain at least a resin (2) and with which the core particles are covered; and the process including the steps of (A) mixing a binder resin-(1) dispersion, a colorant dispersion and a release agent dispersion, (B) adding to a mixed dispersion thus obtained an agglomerating agent to effect agglomeration, (C) adding to core agglomerated particles thus formed a mixture prepared by mixing the resin-(2) dispersion and a metal salt to make the resin (2) adhere to the surfaces of the core agglomerated particles, and (D) heating core-shell agglomerated particles thus formed to a temperature not lower than the glass transition temperatures of the binder resin (1) and resin (2) to effect fusion thereof.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: April 15, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaho Shibata, Masayoshi Kato, Ryuji Higashi, Takayuki Toyoda, Ryo Natori, Yuya Chimoto
  • Publication number: 20140065536
    Abstract: A toner for electrostatic-charge image development contains toner particles in which the surfaces of core particles, including a binder resin composed of a polyester resin, are coated with shell layers. The shell layer is formed of a resin composed of a copolymer of monomers including a monomer having a quaternary ammonium group and a (meth)acrylic copolymer. The molar ratio of units derived from a monomer having a quaternary ammonium group is 5 mol % or more and 35 mol % or less.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Seiji Kikushima
  • Patent number: 8652733
    Abstract: An electrostatic image developing toner includes a core particle containing a binder resin and a coating layer on the core particle. The coating layer contains a resin having a crosslinked structure formed by using at least one of boric acid and derivatives thereof, and the resin having the crosslinked structure is obtained by polymerizing monomers in the presence of the core particle.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Sumiaki Yamasaki, Kazuhiko Yanagida, Susumu Yoshino, Satoshi Hiraoka, Shigeru Seitoku, Hirofumi Shiozaki
  • Patent number: 8652748
    Abstract: The invention provides a process for producing a toner for electrophotography including the following (1) to (4): (1): adding an aggregating agent to a resin particle dispersion (a) so as to attain an aggregating agent concentration Ea (wt %), to thereby produce an aggregated particle dispersion (A); (2): adding a resin microparticle dispersion (b) to the dispersion (A), to thereby produce a dispersion (B) having an aggregating agent concentration Eb (wt %) satisfying 0.60?Eb/Ea<1; (3): modifying the aggregating agent concentration of the dispersion (B), to thereby produce a dispersion (C) of resin microparticle-deposited aggregated particles, having an aggregating agent concentration Ec (wt %) satisfying 0<Ec/Ea?0.30; and (4): heating the resin microparticle-deposited aggregated particles in the dispersion (C) at a temperature falling within a range between Tg and Tg+20 (0 C) of the resin microparticles in the resin microparticle dispersion (b), to thereby coalesce the aggregated particles.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: February 18, 2014
    Assignee: Kao Corporation
    Inventors: Manabu Suzuki, Hiroshi Mizuhata
  • Publication number: 20140045116
    Abstract: A method of making a toner that includes adding pigments into an emulsion aggregation toner without first preparing a pigment dispersion. The method eliminates the pigment dispersion step in the manufacture of emulsion aggregation toilers by surface-treating pigments. Dry surface-treated pigments can be directly incorporated into the toner prior to aggregation in the aggregation coalescence process without the need to first prepare aqueous pigment dispersions.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 13, 2014
    Applicant: XEROX CORPORATION
    Inventors: Enno E. AGUR, Shigang S. QIU, Ke ZHOU, Cuong VONG, Edward G. ZWARTZ, Santiago FAUCHER
  • Patent number: 8647803
    Abstract: A method for producing colored resin particles including: dissolving or dispersing at least binder resin and colorant in organic solvent to prepare oil phase; dissolving resin A and basic compound in aqueous medium to prepare aqueous phase, the resin A having solubility <2.0 g/100 g water having temperature 25° C. and pH 3.0 and solubility ?2.0 g/100 g water having temperature 25° C. and pH 10.0; dispersing the oil phase in the aqueous phase to prepare core particle dispersion liquid; dispersing resin particles in aqueous medium to prepare resin particle dispersion liquid, and adding the resin particle dispersion liquid to the core particle dispersion liquid so that the resin particles are attached onto the core particles, to prepare dispersion liquid containing particles each having the core particle and the resin particles attached thereonto; removing the organic solvent from the dispersion liquid; washing the particles; and drying the particles.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Yamamoto, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomohiro Fukao, Tomoharu Miki
  • Patent number: 8642242
    Abstract: Provided is a method of manufacturing toner by which the toner capable of forming high quality images and reproducing high density gradation, which exhibits an excellent high-temperature offsetting property together with excellent low-temperature fixability, and provides appropriate gloss with respect to images to be formed, can be stably prepared; and also provided is the toner. After conducting a step in which particles made of at least a crystalline polyester resin are coagulated to form core coagulated particles, and an unsaturated amorphous polyester resin particle is attached onto the surface of each of the core coagulated particles to form core-shell type coagulated particles, radical polymerization reaction is conducted by acting a radical polymerization initiator on the foregoing core-shell type coagulated particles to conduct a step in which a layer made of a crosslinking amorphous polyester resin is formed on the surface of each of the core coagulated particles.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: February 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Saburou Hiraoka, Mikihiko Sukeno, Hajime Tadokoro, Ken Ohmura, Tatsuya Nagase, Tomomi Oshiba, Kenji Hayashi, Tomoko Mine
  • Patent number: 8642239
    Abstract: A toner for developing an electrostatic charge image includes a core layer including a first binder resin, a colorant and a releasing agent; and a shell layer coating the core layer and including a second binder resin. The first binder resin of the core layer includes a low molecular weight amorphous polyester resin having a weight-average molecular weight of about 6000 g/mol to about 20000 g/mol, a high molecular weight amorphous polyester resin having a weight-average molecular weight of about 25000 g/mol to about 100000 g/mol, and a crystalline polyester resin having a weight-average molecular weight of about 8000 g/mol to about 30000 g/mol. The second binder resin of the shell layer includes the low and high molecular weight amorphous polyester resins.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: February 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-mo Hong, Takeshi Yoshida, Sung-jin Park
  • 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: 8609316
    Abstract: A method for manufacturing a capsule toner having improved preservability with no deterioration in low-temperature fixability is provided. The method for manufacturing a capsule toner includes a mixed fine resin particle adhering step of adhering mixed fine resin particles including crystalline polyester fine resin particles and amorphous fine resin particles to surfaces of toner base particles to form mixed fine resin particle-adhered particles, a spraying step of spraying a mixed solution of a liquid for plasticizing the toner base particles and the mixed fine resin particles and a crystal nucleating agent, while fluidizing the mixed fine resin particle-adhered particles, and a film-forming step of making a film of the mixed fine resin particles by impact force so that the film is a resin coating layer on the surfaces of the toner base particles.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: December 17, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Hara, Yoshiaki Akazawa, Yoshitaka Kawase, Yoritaka Tsubaki, Yoshinori Mutoh, Keiichi Kikawa
  • Patent number: 8603719
    Abstract: A method for producing an electrophotographic toner including forming a toner base particle by emulsifying or dispersing a solution or dispersion of a toner material comprising a colorant, and any one of a binder resin and a binder resin precursor in an aqueous medium, and adding crystalline organic fine particles having an acid value of 20 mgKOH/g to 80 mgKOH/g into the aqueous medium, before, during or after the forming so as to attach the crystalline organic fine particles onto a surface of the toner base particle.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: December 10, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Yamashita, Yuichi Shirasu, Masaki Watanabe, Tomoki Murayama
  • Patent number: 8557495
    Abstract: A method for producing a developing agent including preparing a dispersion liquid containing first fine particles containing a binder resin and second fine particles containing a color developable compound, a color coupler, and a color eraser, and aggregating the first and second fine particles in the dispersion liquid to form aggregated particles.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: October 15, 2013
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takahito Kabai, Tsuyoshi Itou
  • Publication number: 20130266896
    Abstract: An emulsion aggregation toner composition is disclosed that includes toner particles with at least one small crystalline molecule, such as a trans-cinnamic diester, at least one amorphous resin, optional waxes, coagulants, pigments, and combinations thereof. In other embodiments, the small crystalline molecule is biodegradable and can be made using raw materials derived from renewable resources. Such small crystalline molecules are also compatible with amorphous binder resins, to provide toner compositions with reduced minimum fusing temperatures without sacrificing electrical performance. Processes for preparing emulsion aggregation toner compositions are also described.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 10, 2013
    Applicant: XEROX CORPORATION
    Inventors: Ke ZHOU, Adela GOREDEMA, Karen MOFFAT, Edward G. ZWARTZ, Mike HAWKINS, Rosa DUQUE, Guerino G. SACRIPANTE