Process Of Making Developer Composition Patents (Class 430/137.1)
  • Patent number: 9671707
    Abstract: Provided is an apparatus for heat treatment capable of heat-treating toner particles efficiently and uniformly while suppressing increase of coarse particles due to coalescence, to thereby enable stable toner production. The apparatus for heat-treating powder particles each of which contains a binder resin and a colorant includes: a cylindrical treatment chamber in which the powder particles are heat-treated; a columnar member (6) provided so as to protrude from a lower end part of the treatment chamber toward an upper end part thereof; a powder particle supply unit (2) for supplying the powder particles to the treatment chamber; a hot air supply unit (3) for heat-treating the supplied powder particles; and a collection unit (5) for collecting the heat-treated powder particles discharged outside the treatment chamber through a toner discharge port provided on the lower end part side of the treatment chamber.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: June 6, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hironori Minagawa, Yuichi Mizo, Takeshi Ohtsu, Takakuni Kobori, Kohji Takenaka, Junichi Hagiwara, Daisuke Ito, Kunihiko Kawakita, Yasumori Kanai
  • Patent number: 9442404
    Abstract: There is provided an electrostatic-image-developing toner containing: a toner particle which contains a binder resin containing a polyester resin, a release agent, and a styrene (meth)acrylic resin and in which the styrene (meth)acrylic resin forms a domain having a number average diameter of 300 nm to 800 nm in the toner particle; and an inorganic particle in which the number average diameter of the domain is from 1.5 times to 10 times the number average particle diameter of the inorganic particle.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: September 13, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yutaka Saito, Sakon Takahashi, Yasuaki Hashimoto, Tsutomu Furuta, Yuka Yamagishi
  • Patent number: 9382420
    Abstract: The invention relates to powder, comprising composite particles comprising core particles completely or partially coated with a precipitated first polymer, where the core particles comprise a second polymer which differs from the precipitated first polymer, and where the ratio of the d50 median diameter of the composite particles to the d50 median diameter of the core particles is 1.15 or greater. The invention further relates to processes of using the powders of the present invention to making moldings.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: July 5, 2016
    Assignee: Evonik Degussa GmbH
    Inventors: Wolfgang Diekmann, Franz-Erich Baumann, Maik Grebe, Kristiane Warnke, Sylvia Monsheimer
  • Patent number: 9372420
    Abstract: A heat treating apparatus for powder particles containing a binder resin and a colorant, the heat treating apparatus including: a treating chamber in which a heat treatment of the powder particles is performed; a raw material-supplying unit for supplying the powder particles to the treating chamber; a hot air-supplying unit that supplies hot air to the treating chamber; a cold air-supplying unit that supplies cold air for cooling the heat-treated powder particles; and a recovering unit that recovers the heat-treated powder particles. The raw material-supplying unit includes an introducing tube and a distributing member, and the distributing member is provided with a protruding member on a portion opposite to an outlet portion of the introducing tube, and the distributing member includes a supplying tube including two or more flow paths that extend radially outwardly from the protruding member to a wall surface of the treating chamber.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: June 21, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichi Mizo, Hironori Minagawa, Takakuni Kobori, Kohji Takenaka, Takeshi Ohtsu, Junichi Hagiwara, Daisuke Ito, Kunihiko Kawakita
  • Patent number: 9222836
    Abstract: A system and method for improving the outcome and consistency of hair coloring is provided. In an example method, an image of hair having a sample color may be received. A color space characteristic associated with the hair sample may be determined. An indication of a target color may be received. A colorant formulation may be identified for changing the hair from the sample color to the target color.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: December 29, 2015
    Inventors: Aaron James Conti, Donald James Conti, Jon F. Maple, Patrick J. McIvor, Jr., Leonard G. Case
  • Patent number: 9170508
    Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: October 27, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Yasutada Shitara, Minoru Masuda, Yoshihiro Norikane, Kenta Kenjoh, Satoshi Takahashi
  • Patent number: 9085720
    Abstract: A method of making metal nanoparticles and carbon nanotubes is disclosed. A mixture of a transition metal compound and an aromatic polymer, a precursor of an aromatic polymer, or an aromatic monomer is heated to form a metal nanoparticle composition, optionally containing carbon nanotubes.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 21, 2015
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Teddy M. Keller, Matthew Laskoski
  • Publication number: 20150132696
    Abstract: A toner, including: a binder resin; and a releasing agent, wherein the toner includes a pressure plastic material as the binder resin, wherein the releasing agent includes a plurality of particulate releasing agents, and wherein the particulate releasing agents forming domain phases are dispersed in the pressure plastic material forming a continuous phase.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 14, 2015
    Inventors: Keiko Osaka, Chiaki Tanaka, Masaki Watanabe
  • Patent number: 9023572
    Abstract: A method for producing resin particles, including ejecting a liquid containing at least a resin in the form of droplets from a droplet ejecting unit having a plurality of holes provided in a part of a flow channel for feeding the liquid containing at least a resin, and drying and solidifying the ejected droplets so as to obtain the resin particles, while the ejected droplets are transported by a primary transport air flow flowing in the direction in which the droplets are ejected, wherein the ejected droplets are further transported by a secondary transport air flow which transports the ejected droplets in a different direction from a direction in which the primary transport air flow flows, and wherein a smaller angle of angles formed between a velocity vector of the primary transport air flow and a velocity vector of the secondary transport air flow is less than 120 degrees.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Takahiro Honda, Yohichiroh Watanabe, Yasutada Shitara, Yoshihiro Norikane
  • Patent number: 9017912
    Abstract: A method for producing a toner including the steps of melt-kneading at least a resin binder and a colorant to give a kneaded product (step 1); and heat-treating the kneaded product obtained in the step 1 (step 2), wherein the resin binder contains a crystalline resin and an amorphous resin, wherein the crystalline resin contains a specified composite resin containing (a) a specified polycondensation resin component and (b) a styrenic resin component, in a specified weight ratio, wherein the composite resin is contained in the resin binder in a specified amount. The toner obtained by the above method is used in, for example, the development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: April 28, 2015
    Assignee: Kao Corporation
    Inventors: Akihiro Eida, Koji Kameyama, Eiji Shirai
  • Patent number: 9005865
    Abstract: A toner containing toner particles, each of which contains a binder resin and a colorant, and silica particles, wherein the silica particles have a volume average particle diameter (Dv) of 70 nm or more and 500 nm or less, the variation coefficient of diameters of the silica particles, based on volume distribution thereof, is 23% or less, and wherein when the silica particles are heated from 105° C. to 200° C., the ratio of mass decrease is 0.60% or less.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naotaka Ikeda, Emi Watanabe, Yuhei Terui, Taiji Katsura
  • Publication number: 20150086922
    Abstract: A process includes dissolving a polymer in an organic solvent to form a polymer solution and forming a latex from the polymer solution by contacting the polymer solution with steam while substantially simultaneously distilling the organic solvent.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: XEROX CORPORATION
    Inventors: Yu Liu, Yulin Wang, Ke Zhou, Frank Ping-Hay Lee, Marko Saban, Shigang Qiu, Sonja Hadzidedic
  • Patent number: 8986915
    Abstract: According to one embodiment, a toner includes at least one encapsulated particle containing a color developable compound, color developer and a color eraser and polymeric particles. The at least one encapsulated particle and the polymeric particles being aggregated and fused in dispersion liquid.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: March 24, 2015
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takahito Kabai, Tsuyoshi Itou
  • Publication number: 20150072284
    Abstract: A toner containing a resin binder, a releasing agent, and a charge control agent, wherein the resin binder contains a polyester (A) obtained by polycondensing a carboxylic acid component containing one or more succinic acid derivatives selected from succinic acids substituted with an alkyl group having 8 or more carbon atoms and 20 or less carbon atoms and succinic acids substituted with an alkenyl group having 8 or more carbon atoms and 20 or less carbon atoms, and an alcohol component, a content of the succinic acid derivative being 10% by mol or more and 30% by mol or less of a total amount of the raw material monomers of all the polyesters in the resin binder, and wherein the releasing agent contains an ?-olefin based polymer obtained by polymerizing monomers containing an ?-olefin having 26 or more carbon atoms and 28 or less carbon atoms in an amount of 95% by mol or more, a content of the ?-olefin based polymer being 0.
    Type: Application
    Filed: July 28, 2014
    Publication date: March 12, 2015
    Applicant: KAO CORPORATION
    Inventor: Hisakazu TAJIMA
  • Patent number: 8968976
    Abstract: A method for regenerating a carrier core material for electrophotography, including: treating a carrier for electrophotography including a carrier core material for electrophotography and a coating layer on a surface of the carrier core material for electrophotography with an aqueous solution including an oxidant in a subcritical state or a supercritical state having a temperature of 280° C. or greater and a density of 0.20 g/cm3 or greater, wherein an amount of the oxidant in a total amount of the aqueous solution used in the treating is greater than 0.05 parts by mass with respect to 1 part by mass of the carrier for electrophotography to be treated in the treating.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: March 3, 2015
    Assignees: Ricoh Company, Ltd., National University Corporation Shizuoka University
    Inventors: Takayuki Shimizu, Kazumi Ohtaki, Shinichiro Yagi, Takeshi Sako, Idzumi Okajima
  • Patent number: 8962228
    Abstract: A low melt or ultra low melt toner includes at least one amorphous polyester of an alkoxylated bisphenol based polyester, a crystalline polyester derived from the reaction of an aliphatic dicarboxylic acid or aromatic dicarboxylic acid with an aliphatic diol, at least one colorant and at least one fluorescence agent. Methods of authentication of the toner, of authentication of documents formed from the toner, of embedding information in documents, and the like are also set forth.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: February 24, 2015
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Karen A. Moffat, Jordan H. Wosnick, Eric Rotberg, Cuong Vong, Richard P. N. Veregin, Peter M. Kazmaier
  • Publication number: 20150050592
    Abstract: The present invention relates to toner for electrostatic charge image development including a resin, a metal-containing compound, and a colorant compound precursor to be converted to a colorant compound through a reaction with the metal-containing compound by heat applied at heat fixing. According to the present invention, it is possible to provide toner for electrostatic charge image development which is excellent in fluidity and storage stability and a method of manufacturing the same.
    Type: Application
    Filed: July 23, 2014
    Publication date: February 19, 2015
    Inventors: Junya Ueda, Hiroyuki Yasukawa, Asao Matsushima, Kimihiko Ookubo
  • Publication number: 20150044606
    Abstract: A process includes forming a filter cake from a slurry of emulsion aggregation toner particles and washing the filter cake with an alcohol to create porous toner particles.
    Type: Application
    Filed: August 7, 2013
    Publication date: February 12, 2015
    Applicant: XEROX CORPORATION
    Inventors: Mark E. Mang, Grazyna E. Kmiecik-Lawrynowicz, Mark A. Arnould, Dieu Nguyen
  • Publication number: 20150037725
    Abstract: A yellow toner is provided which is superior in dispersibility of C. I. pigment yellow 185, has a high color development property, and is superior in light resistance. The yellow toner has toner particles containing at least a binder resin, a wax, and a colorant, wherein the yellow toner contains C.I.
    Type: Application
    Filed: March 6, 2013
    Publication date: February 5, 2015
    Inventors: Shosei Mori, Takeshi Sekiguchi, Taichi Shintou, Yuko Katsumoto, Takayuki Ujifusa, Takeshi Miyazaki
  • Publication number: 20150030975
    Abstract: A toner is manufactured by a dissolution suspension method, wherein a colorant that is capable of being dissolved in a predetermined amount into ethyl acetate is used, and no pigment dispersant is used.
    Type: Application
    Filed: July 24, 2014
    Publication date: January 29, 2015
    Inventor: Hiroshi TAKANO
  • Publication number: 20150030976
    Abstract: A black toner for developing a latent electrostatic image, including: a toner base containing a pigment, a binder resin, a releasing agent, a compound containing fluorine and a compound containing sulfur; and an external additive, wherein the toner contains the external additive on a surface of the toner base, and wherein an amount of the fluorine in the toner base is 200 ppm by mass to 600 ppm by mass as measured by combustion-ion chromatography, and an amount of the sulfur in the toner base is 1,000 ppm by mass to 1,500 ppm by mass as measured by the combustion-ion chromatography.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 29, 2015
    Inventors: Kei Yokokawa, Yasuaki Iwamoto, Takahiro Kadota
  • Patent number: 8940467
    Abstract: A toner is provided that, even in a small amount thereof, gives a satisfactory image density and that is free of image problems, e.g., fogging and offset resistance, even during long-term use and in a high-temperature, high-humidity environment. The toner contains a binder resin, a pigment, and a prescribed azo compound wherein, designating as (A) the solubility of the azo compound in a toluene-hexane solubility test and as (B) the solubility of the binder resin constituting the toner in the toluene-hexane solubility test, the (A) and the (B) satisfy the relationship |(B)?(A)|?60.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Hashimoto, Takayuki Toyoda, Masashi Kawamura, Naotaka Ikeda, Hidekazu Fumita, Emi Watanabe, Yuhei Terui
  • Patent number: 8927186
    Abstract: A toner for use in developing an electrostatic latent image is provided. The toner includes a colored particulate material including at least a binder resin and a colorant; and an external additive present on a surface of the colored particulate material and including a particulate crystalline hydroxyapatite. The particulate crystalline hydroxyapatite has an average aspect ratio of not less than 3 and less than 30.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Masayuki Ishii, Toyoshi Sawada
  • Publication number: 20150004535
    Abstract: A toner which includes a binder resin, a colorant and a hydrocarbon wax has a ratio W1/W2 of the half width W1 (° C.) of a endothermic peak derived from melting of the hydrocarbon wax in a first temperature rise process on the toner to the half width W2 (° C.) of a endothermic peak derived from melting of the hydrocarbon wax in a second temperature rise process, as measured with a differential scanning calorimeter, with the ratio W1/W2 being not less than 0.50 and not more than 0.90.
    Type: Application
    Filed: June 24, 2014
    Publication date: January 1, 2015
    Inventors: Kentaro Yamawaki, Takeshi Tsujino, Hidekazu Fumita, Nobuhisa Abe, Junya Asaoka
  • Publication number: 20140370437
    Abstract: A process is disclosed for making a resin emulsion suitable for use in forming toner particles including using a wiped film evaporator for removing residual solvents.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 18, 2014
    Inventors: Amy A. Grillo, Shigang Qiu, Peter V. Nguyen, Chieh-Min Cheng
  • Publication number: 20140370434
    Abstract: A method for reclaiming an out-of-spec emulsion material includes recovering the out-of-spec emulsion material from a scrap manufacturing batch; distilling the out-of-spec emulsion material to raise a solids content of the out-of-spec emulsion material to about 45 wt % or more based on a total weight of the emulsion material; dissolving the distilled emulsion material in a solvent to form a first mixture; adding a base to the first mixture to neutralize acid groups present in the distilled emulsion material, forming a second mixture; emulsifying the second mixture by adding water to the second mixture; and forming particles having an average particle diameter (D50v) within a target range, wherein the out-of-spec emulsion material has an average particle diameter falling outside of the target range.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Inventors: Shigang Steven QIU, Amy GRILLO, Chieh-Min CHENG, Tie Hwee NG
  • Publication number: 20140349232
    Abstract: A method for producing a toner that comprises toner particles, each of which comprises a binder resin, which comprises a resin (A) capable of forming a crystalline structure, and a colorant, the method including: a pressure holding step of, after preparing toner particles, holding the toner particles for 5 minutes or more at a pressure of 2.0 MPa or more under conditions of a temperature T1 (° C.) represented by formula (1): 20?T1?Tp2??(1) (wherein, Tp2 represents the onset temperature of the maximum endothermic peak derived from the resin (A)), wherein a peak temperature Tp1 of the maximum endothermic peak derived from the resin (A) during the first temperature rise of the toner particles as determined by differential scanning calorimetric measurement is 50° C. to 90° C.
    Type: Application
    Filed: May 21, 2014
    Publication date: November 27, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tetsuya Kinumatsu, Shuntaro Watanabe, Kenji Aoki, Atsushi Tani, Yoshihiro Nakagawa, Takaaki Kaya, Toshifumi Mori, Yusuke Kosaki, Takashige Kasuya
  • Publication number: 20140349228
    Abstract: A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 ?m or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 27, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Futoshi KADONOME, Yukio HOSOYA, Kazue NAKAMURA, Saburou HIRAOKA, Yasuko UCHINO
  • Publication number: 20140342279
    Abstract: A method for making polymer-encapsulated metallic ink particles is disclosed herein. An ethylene-based polymeric resin powder is formed, and is mixed with a metallic pigment powder to form a powder mixture. The powder mixture is melted to form a metallic polymer melt. A non-polar carrier is added to the metallic polymer melt to form a slurry. The slurry is processed in a microfluidizer.
    Type: Application
    Filed: January 5, 2012
    Publication date: November 20, 2014
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Publication number: 20140342282
    Abstract: A method for manufacturing a toner, including at least: dissolving or dispersing a toner material including at least any one of a binder resin and a precursor of a binder resin in an organic solvent which is dispersed in a dispersant-including aqueous medium; forming particles by removing the organic solvent; washing the particles; forming voids in the particles by heating to a temperature T while or after dispersing the particles in an aqueous medium; forming toner base particles by adding a charge controlling agent; and adding an external additive to the toner base particles to obtain toner particles, wherein the T is between a glass transition temperature Tg of the toner particles and Tg+25° C., and the toner has a cross-sectional void fraction Sp/St of 0.1% to 15.0%, where St is a cross-sectional area of the toner particles, and Sp is a cross-sectional area of the voids.
    Type: Application
    Filed: September 12, 2012
    Publication date: November 20, 2014
    Inventors: Keisuke Tada, Kenichi Uehara, Daisuke Misawa, Ayumi Oikawa, Hiroshi Endoh
  • Patent number: 8889331
    Abstract: The disclosure relates to a process for making a latex emulsion suitable for use in a toner comprising at least one amorphous polyester resin and a solvent to form a resin mixture, including that the process is carried out at room temperature using acoustic mixing.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: November 18, 2014
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, Santiago Faucher
  • Publication number: 20140322642
    Abstract: The present disclosure provides a polyester toner resin comprising a natural phenol used in manufacturing a toner for imaging devices.
    Type: Application
    Filed: April 30, 2013
    Publication date: October 30, 2014
    Applicant: Xerox Corporation
    Inventors: Guerino G. Sacripante, Ke Zhou, Biritawit Asfaw, Sonja Hadzidedic, Rosa Duque
  • Patent number: 8865388
    Abstract: Disclosed is an decolorizable electrophotographic toner, containing a binder resin, an electron-donating color-developable agent, and a wax having a color-developing action and having an acid value of 60 mgKOH/g or more.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 21, 2014
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Takahito Kabai, Tsuyoshi Itou
  • Patent number: 8865387
    Abstract: The present invention relates to, in the toner including toner particles having a biding agent resin, colorings and a release agent, an electrostatic image developing toner, its composition, and a preparation method thereof. The electrostatic image developing toner is prepared by the method comprising: (1) preparing an inorganic dispersion medium; (2) dispersing/dissolving a polymerizable monomer mixture; (3) micronizing the liquid obtained in step (2) in the liquid obtained in step (1) with high shear force in order to create droplets; (4) performing radical polymerization of the micronized droplets obtained in step (3); (5) aggregating particles obtained in step (4); (6) fusing the aggregate obtained in step (5); (7) cleaning and drying the toner obtained by step (6); and (8) adding additives to impart electrification and fluidity to a toner obtained by step (7).
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: October 21, 2014
    Assignee: Park & OPC Co., Ltd
    Inventors: Jae-Goang Yu, Ho-Geun Jo
  • Publication number: 20140308610
    Abstract: The present invention provides a toner that contains an azo pigment well-dispersed in a binder resin and has a satisfactory color tone. The toner contains toner particles each containing a binder resin and a colorant. Each of the toner particles contains a compound having a polyester moiety and a bisazo structure moiety. The colorant is the azo pigment.
    Type: Application
    Filed: November 8, 2012
    Publication date: October 16, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuki Hasegawa, Yasuaki Murai, Masatake Tanaka, Takayuki Toyoda, Masashi Kawamura, Waka Hasegawa, Masashi Hirose
  • Patent number: 8852843
    Abstract: A process is disclosed for the preparation of developer compositions comprising: providing a first developer including carrier and a first toner comprised of resin, pigment, polyolefin, a first compatibilizer, a first charge control agent, and a first metal oxide surface additive; and, adding thereto a second developer including carrier, and a second toner, second compatibilizer, a second charge control agent, and a second metal oxide surface additive.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: October 7, 2014
    Assignee: Xerox Corporation
    Inventors: Mark J. Hirsch, Kip L. Jugle, John R. Falvo
  • Patent number: 8846289
    Abstract: A method of manufacturing toner including melting, mixing, and kneading a releasing agent and a coloring agent with at least part of a polyester binder resin, and suspending and granulating an oil phase comprising the binder resin, the coloring agent, and the releasing agent in an aqueous medium.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: September 30, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Ogawa, Tsuyoshi Sugimoto, Naohito Shimota, Hiroshi Yamashita, Masana Shiba, Junichi Awamura
  • Patent number: 8846284
    Abstract: Provided is a toner comprising toner particles, wherein each of the toner particles has a core-shell structure composed of a core and a shell phase formed on the core, the shell phase contains a resin (B), and the core contains a binder resin (A), a colorant and a wax, wherein the toner particles contain the resin (B) in a specific amount with respect to the core, and wherein the solubility parameter (SP value) of the binder resin (A) is denoted by SP(A), the SP value of the resin (B) is denoted by SP(B), the SP value of a repeating unit with the smallest SP value from among repeating units constituting the resin (B) is denoted by SP(C), and the SP value of the wax is denoted by SP(W), each of the SP(A), SP(B), SP(C) and SP(W) satisfy specific relationships.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Kinumatsu, Atsushi Tani, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Ayako Okamoto, Yoshihiro Nakagawa, Toshifumi Mori, Takashige Kasuya
  • Patent number: 8841055
    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: Grant
    Filed: April 4, 2012
    Date of Patent: September 23, 2014
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Adela Goredema, Karen Moffat, Edward G. Zwartz, Mike Hawkins, Rosa Duque, Guerino G. Sacripante
  • Patent number: 8828285
    Abstract: A particulate production apparatus, including a droplet discharger to discharge a liquid including a particulate element which is solidified to become a particulate; and a pressure controller to feed the liquid including a particulate element to the droplet discharger at a pressure within a desired range.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Minoru Masuda, Yasutada Shitara, Yoshihiro Norikane, Satoshi Takahashi
  • Publication number: 20140248559
    Abstract: The disclosure relates to a process for making a latex emulsion suitable for use in a toner comprising at least one amorphous polyester resin and a solvent to form a resin mixture, including that the process is carried out at room temperature using acoustic mixing.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Santiago Faucher
  • Publication number: 20140248558
    Abstract: The present disclosure provides processes for making inorganic or organic colorant dispersions using an acoustic mixer, where such dispersion may be used to make toner. Such processes apply low frequency, high intensity acoustic energy and a consistent shear field throughout an entire mixing vessel and provide uniform dispersion of colorants within minutes.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Santiago Faucher, Kimberly D. Nosella, David R. Kurceba, Yulin Wang, Karina Lopez
  • Publication number: 20140242511
    Abstract: Provided is a method for manufacturing carrier core particles for electrophotographic developer capable of stably maintaining high chargeability over a long time. The method for manufacturing carrier core particles includes a granulation step of granulating a mixture of raw materials containing manganese, iron, strontium, and calcium and a firing step of firing the mixture granulated in the granulation step. The firing step includes a heating process of heating the granular mixture with an increase in temperature to a predetermined degree and a cooling process of cooling the granular mixture, after the heating process, in an atmosphere with an oxygen concentration ranging from 5000 ppm to 20000 ppm. The molar ratio of the sum of strontium and calcium to the sum of the manganese, iron, strontium, and calcium is 0.0026 to 0.013.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 28, 2014
    Applicants: DOWA IP CREATION CO., LTD., DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Takeshi KAWAUCHI, SHO OGAWA, HARUKA SEKI
  • Patent number: 8802344
    Abstract: A process for making toner particles is provided. In embodiments, a suitable process includes adding a washing aid agent to toner particles at the time of washing the toner particles prior to their drying and recover. The washing aid agent assist in the removal of ionic species, including surfactants and ions that are part of the emulsion aggregation process, from the resulting toner particles. Utilization of the washing aid agent produces toner particles having improved charging characteristics.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: August 12, 2014
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Chieh-Min Cheng, Zhaoyang Ou, Christopher D. Blair
  • Patent number: 8802345
    Abstract: The present disclosure provides a process for the preparation of developer compositions comprising: a first developer comprised of carrier and toner comprised of resin, pigment, polyolefin, compatibilizer, charge control agent, and metal oxide surface additive, and adding thereto a second developer comprised of carrier, and second compatibilizer, charge control agent, and metal oxide surface additive. The second developer can be directly dispensed into a developer housing.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: August 12, 2014
    Assignee: Xerox Corporation
    Inventors: Mark James Hirsch, Kip L. Jugle, John R. Falvo
  • Patent number: 8785101
    Abstract: Provided is a toner containing toner particles, each of which includes a binder resin containing a polyester as a main component, a colorant, and a wax, in which the binder resin includes a block polymer in which a segment capable of forming a crystalline structure and a segment incapable of forming a crystalline structure are bonded, the toner has a maximum endothermic peak from the binder resin, as determined by differential scanning calorimetry measurement, with a peak temperature in a specific range and with an endothermic quantity in a specific range, and the wax is an ester wax having a functionality of 3 or more.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Kaya, Tetsuya Kinumatsu, Toshifumi Mori, Ayako Okamoto, Kenji Aoki, Shuntaro Watanabe, Atsushi Tani, Takashige Kasuya
  • Patent number: 8785097
    Abstract: Disclosed is a decolorable toner produced by aggregating dispersed fine particles of a color material containing at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles containing at least a binder resin having a carboxyl group, then adding a compound having a carbodiimide group or an epoxy group reactive with the carboxyl group of the binder resin, and thereafter fusing the aggregate particles, respectively in an aqueous medium. The thus obtained decolorable toner can suppress the generation of fine powder by the release of erasable color material fine particles from the toner particles.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 22, 2014
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Motonari Udo, Tsuyoshi Itou, Masahiro Ikuta, Takafumi Hara
  • Patent number: 8785102
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: July 22, 2014
    Assignee: Xerox Corporation
    Inventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
  • Publication number: 20140199625
    Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Richard PN Veregin, Kimberly D. Nosella, Santiago Faucher, Cuong Vong, Enno E. Agur
  • Publication number: 20140199621
    Abstract: A toner or developer is provided having toner particles which exhibit a higher glass transition temperature on their surface than the interior thereof. In one aspect, the toner particles contain a crystalline polyester resin, an amorphous polyester resin and a coloring material, in which the core of the toner particles exhibit the glass transition temperature g of from 30° C. to 45° C. and the surface of the toner particles exhibits the glass transition temperature of from 50° C. to 70° C.
    Type: Application
    Filed: December 31, 2013
    Publication date: July 17, 2014
    Applicants: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Toshiba
    Inventor: SATOSHI ARAKI