Patents by Inventor Tsuyoshi Sugimoto

Tsuyoshi Sugimoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7947419
    Abstract: A toner including a binder resin including a polyester resin, a colorant, and a release agent including a polyglycerin ester having a melt viscosity of from 1.0 to 40 mPa·sec at 120° C. and a hydroxyl value of from 0 to 100 mgKOH/g is provided. The polyglycerin ester is an ester of a polyglycerin having an average polymerization degree of from 2 to 10 and an aliphatic acid having 16 to 24 carbon atoms in average.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: May 24, 2011
    Assignee: Ricoh Company Limited
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu
  • Publication number: 20110076607
    Abstract: A toner including at least one polyester resin serving as a binder resin, a colorant, a releasing agent, and a fixing aid, wherein the fixing aid includes a fatty acid amide-based compound, and the fatty acid amide-based compound is at least one of a fatty acid amide compound having a mono- or higher valent amide bond and a fatty acid amide-based compound having a mono- or higher valent amino group or a hydroxyl group.
    Type: Application
    Filed: May 22, 2009
    Publication date: March 31, 2011
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu, Masaki Watanabe, Satoshi Ogawa, Masana Shiba, Junichi Awamura, Naohito Shimota
  • Publication number: 20110076612
    Abstract: A method for producing a toner, containing: dispersing, in an aqueous medium, an oil phase which contains an organic solvent, and a binder resin component contained in the organic solvent, where the binder resin component contains a crystalline polyester resin and an amorphous polyester resin; and removing the organic solvent from the dispersion to obtain the toner, in which the dispersing further contains heating and dissolving the crystalline polyester and the amorphous polyester in the organic solvent to obtain a solution, cooling the solution so as to recrystallize the crystalline polyester resin, and mechanically pulverizing the recrystallized crystalline polyester resin so as to obtain a crystalline polyester dispersion.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 31, 2011
    Inventors: Junichi AWAMURA, Hiroshi Yamashita, Teruki Kusahara, Tsuyoshi Sugimoto, Tomomi Suzuki
  • Publication number: 20110076610
    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: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Inventors: Satoshi Ogawa, Tsuyoshi Sugimoto, Naohito Shimota, Hiroshi Yamashita, Masana Shiba, Junichi Awamura
  • Patent number: 7858280
    Abstract: A toner formed of a toner composition containing a resin and a plasticizer, wherein the following relationships (1) and (2) are satisfied: Tg2r>Tg2t??(1), and Tg1t?Tg2t>Tg1r?Tg2r??(2), wherein Tg1r represents the peak of the resin for the first temperature rise and Tg2r represents the peak of the resin for the second temperature rise when a differential scanning calorimeter (DSC) measurement is performed for the resin, Tg1t represents the peak of the toner comprising the resin for the first temperature rise and Tg2t represents the peak of the toner comprising the resin for the second temperature rise when a differential scanning calorimeter (DSC) measurement is performed for the toner.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: December 28, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Hiroto Higuchi
  • Publication number: 20100310980
    Abstract: A toner, including a colorant; a binder resin; a release agent; and a fixing supplemental component, wherein the toner has a storage elastic modulus G? (Pa) satisfying the following conditions: 5.0×104<G?<5.0×105 at 80° C. 1.0×104<G?<1.0×105 at 90° C. 5.0×103<G?<5.0×104 at 100° C. 1.0×103<G?<1.0×104 at 120° C. 1.0×103<G?<1.0×104 at 150° C.
    Type: Application
    Filed: May 11, 2010
    Publication date: December 9, 2010
    Inventors: Tsuyoshi Sugimoto, Naohito Shimota, Hiroshi Yamashita, Satoshi Ogawa, Masana Shiba, Junichi Awamura, Tsuneyasu Nagatomo, Masaki Watanabe
  • Patent number: 7824835
    Abstract: To provide a toner prepared by emulsifying or dispersing a solution or dispersion of a toner material in an aqueous medium containing fine resin particles for granulation, wherein at least one of the toner material and the aqueous medium contains a polyalkylene glycol ester compound that is compatible with the fine resin particles and that has a weight average molecular weight of 2,000 or greater.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: November 2, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita
  • Patent number: 7790343
    Abstract: A process includes developing toner images on a photoconductor, transferring to an intermediate transfer belt and a transferring-and-fixing roller. The toner images are transferred to and fixed to a paper simultaneously while the paper moves between the transferring-and-fixing roller and a pressure roller which is pressed against the transferring-and-fixing roller. After transfer process to the paper, residual toner particles remaining on the transferring-and-fixing roller are removed by a cleaning roller. In order to achieve a cleanability from the transferring-and-fixing roller and prevent the intermediate belt from becoming too high temperature, the elastic modulus of the toner particles measured when the toner particles are heated is greater than the elastic modulus of the toner particles when cooled in a temperature range where the glass transition temperature and 10° C. lower than the melting temperature of the toner particles.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: September 7, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Hiromitsu Takagaki, Takashi Fujita, Atsushi Nakafuji, Hiromi Tamura, Shin Kayahara, Tsuyoshi Sugimoto, Takashi Seto, Katsuaki Miyawaki
  • Publication number: 20100209780
    Abstract: A battery that includes a cathode, anode and an electrolytic solution containing an organic electrolyte solvent including a compound of the formula: R1—CO—NR2—OR3 wherein R1 is selected from alkanes, alkenes, alkynes, aryls and their substituted derivatives and perfluorinated analogues; R2 is selected from alkanes, alkenes, alkynes, aryls and their substituted derivatives; R3 is selected from alkanes, alkenes, alkynes, aryls and their substituted derivatives wherein the electrolyte is stable at voltages of greater than 4.0 volts.
    Type: Application
    Filed: February 17, 2009
    Publication date: August 19, 2010
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Synthonix Corporation, Toyota Motor Corporation
    Inventors: John Muldoon, Gary Allred, Scott Ankeney, Masaki Matsui, Anthony Dotse, Tsuyoshi Sugimoto
  • Patent number: 7709174
    Abstract: A toner is provided including a colorant; a first binder resin; and a second binder resin, wherein an amount of the first binder resin and an amount of the second binder resin are phase separated from each other in the toner, and wherein a phase of the first binder resin is partially or completely covered with a phase of the second binder resin; and a method of preparing the toner, and a developer, an image forming method, an image forming apparatus, and a process cartridge using the toner.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: May 4, 2010
    Assignee: Ricoh Company Limited
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Ryota Inoue, Yoshihiro Moriya, Shinichi Wakamatsu, Akihiro Kotsugai
  • Publication number: 20100081075
    Abstract: A magenta toner, produced by a method including suspending an oily liquid comprising a binder resin and a colorant in an aqueous medium, wherein the colorant comprises a naphthol pigment and a quinacridone pigment, and the quinacridone pigment comprises a pigment having a specific formula.
    Type: Application
    Filed: September 28, 2009
    Publication date: April 1, 2010
    Inventors: Naohiro WATANABE, Shinichi WAKAMATSU, Naohito SHIMOTA, Hiroshi YAMASHITA, Tsuyoshi SUGIMOTO, Masaki WATANABE, Tsuneyasu NAGATOMO
  • Publication number: 20100075245
    Abstract: Disclosed is a resin particle having a volume average particle diameter of 10 nm to 500 nm, obtained by polymerizing an addition polymerizable monomer containing a silsesquioxane (a) represented by Formula (I) or by copolymerizing the silsesquioxane (a) with an addition polymerizable monomer (b), where R1 to R7 each independently represent a group selected from the group consisting of hydrogen, alkyl having 1 to 40 carbon atoms, substituted or unsubstituted aryl, and substituted or unsubstituted arylalkyl; any hydrogen in the alkyl group is optionally substituted by fluorine and any —CH2— is optionally substituted by —O—, —CH?CH—, cycloalkylene or cycloalkenylene; any hydrogen in alkylene in the arylalkyl group is optionally substituted by fluorine and any —CH2— is optionally substituted by —O— or —CH?CH—; and A1 represents an addition polymerizable functional group.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Inventors: Masaki Watanabe, Naohito Shimota, Hiroshi Yamashita, Naohiro Watanabe, Tsuneyasu Nagatomo, Tsuyoshi Sugimoto, Shinichi Wakamatsu, Kenya Itoh, Mikio Yamahiro
  • Publication number: 20100075243
    Abstract: A toner for electrophotography, including a release agent; a binder resin; a colorant; and an external additive, wherein the binder resin is a polyester resin, and wherein the toner has a loss on heat not greater than 0.40% by weight at 165° C. and a difference between a loss on heat at 200° C. and the loss on heat at 165° C. not greater than 0.50% by weight, and includes a n-paraffin in an amount not less than 3% by weight.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Inventors: Naohito SHIMOTA, Naohiro Watanabe, Hiroshi Yamashita, Tsuyoshi Sugimoto, Masaki Watanabe, Satoshi Kojima, Shinichi Wakamatsu, Tsuneyasu Nagatomo
  • Publication number: 20100035170
    Abstract: A toner according to the present invention contains at least a polyester resin as a binder resin, a colorant, a releasing agent, a fixing-assisting component, and a fatty acid, wherein the fixing-assisting component has a melting point of 60° C. to 120° C. and contains at least one of an esterified compound obtained by esterification of the fatty acid and an amide compound obtained by amidation of the fatty acid.
    Type: Application
    Filed: July 27, 2009
    Publication date: February 11, 2010
    Inventors: Tsuyoshi Sugimoto, Naohito Shimota, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu, Masaki Watanabe
  • Publication number: 20090325099
    Abstract: A toner produced by a method including dissolving or dispersing toner components comprising a colorant and at least one of a binder resin and a precursor thereof in an organic solvent to prepare a toner components liquid, dispersing the toner components liquid in an aqueous medium including a surfactant, a particulate resin A having the same polarity as the surfactant and a volume average particle diameter of from 5 to 50 nm, and a particulate resin B having a volume average particle diameter of from 10 to 500 nm to form liquid droplets, and removing the organic solvent from the liquid droplets. The particulate resin B is incompatible with the binder resin and swells in the organic solvent.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 31, 2009
    Inventors: Masaki WATANABE, Hiroshi YAMASHITA, Tsuyoshi SUGIMOTO, Naohiro WATANABE, Shinichi WAKAMATSU
  • Patent number: 7629099
    Abstract: A toner is provided manufactured by a method having the steps: dispersing toner constituents including a resin, in an aqueous medium containing a particulate resin, wherein the resin has a polyester skeleton formed by a ring-opening addition reaction of a cyclic ester with a first compound having an active hydrogen group; and a developer and an image forming method using the toner, and a toner container containing the toner.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: December 8, 2009
    Assignee: Ricoh Company Limited
    Inventors: Hiroshi Yamashita, Tsuyoshi Sugimoto, Hiroto Higuchi, Yohichiroh Watanabe, Yasuhiro Shindo
  • Publication number: 20090233204
    Abstract: Provided is a toner for image formation, granulated by dispersing, emulsifying, or both dispersing and emulsifying an oil phase containing toner constituting materials in an aqueous medium. The toner constituting materials contain a binder resin, a colorant and a pigment dispersant which is a polyester derivative having an acid value of 28 to 50 mgKOH/g and an amine value of 1 to 50 mgKOH/g, and satisfy the following Expressions 1 and 2, where Expression 1 represents a mass ratio, ? is a glass transition temperature of the binder resin, and ? is a glass transition temperature of a mixture of the binder resin and the pigment dispersant in the ratio of Expression 1. Binder resin:Pigment dispersant=100:5??Expression 1 0° C.?????10° C.
    Type: Application
    Filed: March 13, 2009
    Publication date: September 17, 2009
    Inventors: Naohiro WATANABE, Hiroshi Yamashita, Shinichi Wakamatsu, Tsuyoshi Sugimoto
  • Publication number: 20090214973
    Abstract: A toner is provided that includes a release agent, a colorant, a binder resin including a polyester resin, and a fixing auxiliary component including an ester compound of a fatty acid with an alcohol. The fatty acid includes stearic acid and behenic acid in a total amount of 80% by weight or more. The alcohol includes ethylene glycol in an amount of 80% by weight or more. The ester compound has a hydroxyl value of 10 to 100 mgKOH/g.
    Type: Application
    Filed: February 26, 2009
    Publication date: August 27, 2009
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu, Masaki Watanabe
  • Publication number: 20090104555
    Abstract: The present invention provides a toner containing at least a binder resin and a pigment, wherein the amount of the pigment in the toner is 3.0% by mass to 8.5% by mass, the volume average particle diameter of the toner is 2.0 ?m to 6.0 ?m, and a monochrome image, which has been fixed on a recording medium so that the amount of the toner adhered onto the recording medium is 0.25 mg/cm2, has a reflection density of 1.2 to 2.5.
    Type: Application
    Filed: October 6, 2008
    Publication date: April 23, 2009
    Inventors: Shinichi Wakamatsu, Hiroshi Yamashita, Naohiro Watanabe, Tsuyoshi Sugimoto
  • Publication number: 20090092917
    Abstract: A toner including a binder resin including a polyester resin, a colorant, and a release agent including a polyglycerin ester having a melt viscosity of from 1.0 to 40 mPa·sec at 120° C. and a hydroxyl value of from 0 to 100 mgKOH/g is provided. The polyglycerin ester is an ester of a polyglycerin having an average polymerization degree of from 2 to 10 and an aliphatic acid having 16 to 24 carbon atoms in average.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 9, 2009
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu