Patents by Inventor Shinpei Takagi

Shinpei Takagi 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: 9733586
    Abstract: A resin composite particle includes a continuous phase formed of a polyester resin, and a dispersed phase formed of a vinyl resin and dispersed in the continuous phase, the volume average particle diameter of the resin composite particles being from 50 nm to 1,000 nm.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: August 15, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kousaku Yoshimura, Tomohiro Shinya, Kiyohiro Yamanaka, Shinpei Takagi
  • Publication number: 20170052466
    Abstract: A resin composite particle includes a continuous phase formed of a polyester resin, and a dispersed phase formed of a vinyl resin and dispersed in the continuous phase, the volume average particle diameter of the resin composite particles being from 50 nm to 1,000 nm.
    Type: Application
    Filed: February 8, 2016
    Publication date: February 23, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kousaku YOSHIMURA, Tomohiro SHINYA, Kiyohiro YAMANAKA, Shinpei TAKAGI
  • Publication number: 20160282739
    Abstract: An electrostatic charge image developing toner includes a toner particle including a core which contains a styrene (meth)acrylic modified polyester resin and a colorant, and a shell layer which covers the core and contains a styrene (meth)acrylic modified polyester resin and a release agent.
    Type: Application
    Filed: July 23, 2015
    Publication date: September 29, 2016
    Inventors: Kazusei YOSHIDA, Hirofumi SHIOZAKI, Shinpei TAKAGI
  • Patent number: 9436111
    Abstract: An electrostatic charge image developing toner includes a toner particle including a core which contains a styrene (meth)acrylic modified polyester resin and a colorant, and a shell layer which covers the core and contains a styrene (meth)acrylic modified polyester resin and a release agent.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: September 6, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kazusei Yoshida, Hirofumi Shiozaki, Shinpei Takagi
  • Patent number: 9329511
    Abstract: An electrostatic charge image developing toner includes toner particles containing an amorphous resin and a crystalline resin, wherein when a softening temperature is measured at 30 points in surface layer parts of the toner particles, a difference (TH(° C.)?TL(° C.)) between a maximum value (TH(° C.)) and a minimum value (TL(° C.)) out of the softening temperatures at the 30 points is from 25° C. to 100° C.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: May 3, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kiyohiro Yamanaka, Soichiro Kitagawa, Tomohiro Shinya, Shinpei Takagi
  • Publication number: 20160091811
    Abstract: An electrostatic charge image developing toner includes a binder resin containing an amorphous polyester resin and a crystalline polyester resin, wherein a ratio of the crystalline polyester resin to a total of the amorphous polyester resin and the crystalline polyester resin is from 12% to 40% by weight, and the toner satisfies the following equations (1) and (2), 30° C.?T1?45° C.??(1) 1.0×108 Pa?G?(X)?5.0×108 Pa??(2) wherein T1 represents a temperature at which a storage elastic modulus G? is 1.0×108 Pa, G?(X) represents a storage elastic modulus G?(B) at a temperature X?° C., and X?° C. represents a temperature at which a ratio of a storage elastic modulus G?(B) to a storage elastic modulus G?(A) has a maximum value.
    Type: Application
    Filed: January 13, 2015
    Publication date: March 31, 2016
    Inventors: Takatsugu DOI, Kosaku YOSHIMURA, Satoshi YOSHIDA, Soichiro KITAGAWA, Shinpei TAKAGI
  • Patent number: 9285696
    Abstract: An electrostatic charge image developing toner includes an unsaturated polyester resin that contains a structural unit derived from a dicarboxylic acid component having an ethylenically unsaturated bond and a structural unit derived from a dialcohol component having a rosin ester group, wherein a surface layer portion of the toner contains a crosslinked material of the unsaturated polyester resin.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: March 15, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomohiro Shinya, Shinpei Takagi, Soichiro Kitagawa, Kiyohiro Yamanaka
  • Patent number: 9005863
    Abstract: An electrostatic charge image developing toner includes toner particles having a core that includes a block copolymer of a crystalline polyester block and an amorphous polyester block, and a shell that covers the core and includes an amorphous polyester resin having an ethylenically unsaturated double bond, and of which a surface layer part includes a crosslinked product of the amorphous polyester resin having an ethylenically unsaturated double bond.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: April 14, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinpei Takagi, Soichiro Kitagawa, Shinya Sakamoto, Tomohiro Shinya
  • Publication number: 20150072276
    Abstract: An electrostatic charge image developing toner includes an unsaturated polyester resin that contains a structural unit derived from a dicarboxylic acid component having an ethylenically unsaturated bond and a structural unit derived from a dialcohol component having a rosin ester group, wherein a surface layer portion of the toner contains a crosslinked material of the unsaturated polyester resin.
    Type: Application
    Filed: May 14, 2014
    Publication date: March 12, 2015
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Tomohiro SHINYA, Shinpei TAKAGI, Soichiro KITAGAWA, Kiyohiro YAMANAKA
  • Publication number: 20150050590
    Abstract: An electrostatic charge image developing toner includes toner particles containing an amorphous resin and a crystalline resin, wherein when a softening temperature is measured at 30 points in surface layer parts of the toner particles, a difference (TH(° C.)?TL(° C.)) between a maximum value (TH(° C.)) and a minimum value (TL(° C.)) out of the softening temperatures at the 30 points is from 25° C. to 100° C.
    Type: Application
    Filed: May 27, 2014
    Publication date: February 19, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kiyohiro YAMANAKA, Soichiro KITAGAWA, Tomohiro SHINYA, Shinpei TAKAGI
  • Publication number: 20150044602
    Abstract: There is provided an electrostatic image-developing toner containing an amorphous polyester resin, a crystalline polyester resin, and a resin particle incompatible with the amorphous polyester resin, wherein the amorphous polyester resin contains an amorphous polyester resin having an ethylenically unsaturated bond and a surface layer part contains a crosslinking product of the amorphous polyester resin having an ethylenically unsaturated bond.
    Type: Application
    Filed: April 17, 2014
    Publication date: February 12, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Soichiro KITAGAWA, Shinpei TAKAGI, Kiyohiro YAMANAKA, Tomohiro SHINYA
  • Patent number: 8906588
    Abstract: An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10° C.?Ma-Mb?45° C.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: December 9, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tomohiro Shinya, Shinpei Takagi, Soichiro Kitagawa, Shinya Sakamoto
  • Patent number: 8877414
    Abstract: An electrostatic image developing toner including: a toner matrix particle having an adhering particle adhered onto the surface of a central particle, wherein a volume average value of a ratio X of a peripheral length PM to a circle-corresponding diameter D is from 3.6 to 5.0.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: November 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Atsushi Sugawara, Shinpei Takagi, Atsushi Sugitate, Daisuke Noguchi
  • Publication number: 20140113227
    Abstract: An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10° C.?Ma-Mb?45° C.
    Type: Application
    Filed: June 6, 2013
    Publication date: April 24, 2014
    Inventors: Tomohiro SHINYA, Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO
  • Publication number: 20140099579
    Abstract: An electrostatic charge image developing toner includes toner particles having a core that includes a block copolymer of a crystalline polyester block and an amorphous polyester block, and a shell that covers the core and includes an amorphous polyester resin having an ethylenically unsaturated double bond, and of which a surface layer part includes a crosslinked product of the amorphous polyester resin having an ethylenically unsaturated double bond.
    Type: Application
    Filed: June 7, 2013
    Publication date: April 10, 2014
    Inventors: Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO, Tomohiro SHINYA
  • Patent number: 8663890
    Abstract: Provided is an electrostatic charge image developing toner, each toner particle including a core portion, a first shell layer, and a second shell layer, wherein the core portion contains a first polyester resin, a colorant, and a release agent, the first shell layer contains a second polyester resin and covers the core portion, the second shell layer contains a polymer of an aromatic vinyl monomer and a third polyester resin having an ethylenic unsaturated double bond that is polymerizable with the aromatic vinyl monomer, and covers the first shell layer, and a total amount of the first shell layer and the second shell layer is within a range of from 16% by weight to 40% by weight of the toner particle.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: March 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinpei Takagi, Soichiro Kitagawa, Shinya Sakamoto, Tomohiro Shinya
  • Publication number: 20140051021
    Abstract: An electrostatic charge image developing toner includes toner particles that have a core containing polyester, a release agent, and a colorant in which the polyester does not have an ethylenically unsaturated bond, and a shell coating the core and containing a polymer of vinyl monomers, and the toner particles satisfy the following Expression (1): Expression (1): 0.1?B/(A+B)?0.7, wherein in Expression (1), A represents a proportion (atom %) of atoms constituting the polyester in the entire atoms, that is obtained by analyzing surfaces of the toner particles by X-ray photoelectron spectroscopy; and B represents a proportion (atom %) of atoms constituting the polymer of vinyl monomers in the entire atoms, that is obtained by analyzing the surfaces of the toner particles by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: May 31, 2013
    Publication date: February 20, 2014
    Inventors: Shinya SAKAMOTO, Shinpei TAKAGI, Soichiro KITAGAWA, Tomohiro SHINYA
  • Publication number: 20130183618
    Abstract: Provided is an electrostatic charge image developing toner, each toner particle including a core portion, a first shell layer, and a second shell layer, wherein the core portion contains a first polyester resin, a colorant, and a release agent, the first shell layer contains a second polyester resin and covers the core portion, the second shell layer contains a polymer of an aromatic vinyl monomer and a third polyester resin having an ethylenic unsaturated double bond that is polymerizable with the aromatic vinyl monomer, and covers the first shell layer, and a total amount of the first shell layer and the second shell layer is within a range of from 16% by weight to 40% by weight of the toner particle.
    Type: Application
    Filed: July 3, 2012
    Publication date: July 18, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinpei TAKAGI, Soichiro KITAGAWA, Shinya SAKAMOTO, Tomohiro SHINYA
  • Patent number: 8236471
    Abstract: A toner for developing an electrostatic charge image, the toner including a binder resin containing a crystalline polyester resin and a noncrystalline polyester resin, a colorant, a releasing agent, a ketone solvent, and an alcoholic solvent, the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being less than about 10 ppm when 0.5 g of the toner is dispersed in 2 g of deionized water to form a toner dispersion liquid, and the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being from about 2 ppm to about 50 ppm when 0.5 g of the toner is dispersed in 2 g of N,N-dimethylformamide to form a toner dispersion liquid.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: August 7, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinpei Takagi, Satoshi Yoshida
  • Patent number: 8158319
    Abstract: A toner for electrostatic charge image development, the toner includes a binder resin, the binder resin includes an amorphous polyester resin having alkenyl groups and a crystalline polyester resin, about 5% or more of the alkenyl groups have a branched structure, and the o crystalline polyester resin has an ester concentration (M) obtained by the following Equation of from about 0.04 to about 0.08: M=K/A??Equation wherein, K represents the number of ester bonds in the crystalline polyester resin, and A represents the number of atoms that constitute the polymer chain of the crystalline polyester resin.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: April 17, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuhiro Arima, Shinpei Takagi