Patents by Inventor Kaori MATSUSHIMA

Kaori MATSUSHIMA 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).

  • Publication number: 20140377699
    Abstract: Provided is a toner for electrostatic image development having low-temperature fixability and providing stability of glossiness for various types of paper. The toner for electrostatic image development includes toner particles having a domain-matrix structure. In the domain-matrix structure, a domain phase including a crystalline polyester resin having a melting point of 40 to 90° C. and a domain phase including a vinyl resin B having a weight average molecular weight of 250,000 to 400,000 are dispersed in a matrix phase including a vinyl resin A having a weight average molecular weight of 10,000 to 50,000.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 25, 2014
    Inventors: Kaori MATSUSHIMA, Masahiro Matsuoka, Aya Shirai, Takaki Kawamura, Taiki Amemiya
  • Publication number: 20140356780
    Abstract: Provided is a toner for electrostatic image development that has low-temperature fixability and long-term stable electrification performance, also has heat-resistant storage stability, and can suppress the occurrence of unevenness in gloss. Also provided is a production process of the toner. The toner for electrostatic image development includes toner particles having a domain-matrix structure. In the toner particles, a crystalline polyester resin and an amorphous resin including an amorphous polyester segment and a polymerized vinyl segment that are chemically bonded are dispersed as domain phases in a matrix phase formed of a vinyl resin.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Takaki Kawamura, Kaori Matsushima, Aya Shirai, Taiki Amemiya
  • Publication number: 20140349231
    Abstract: Disclosed is a toner for electrostatic image development that has excellent low-temperature fixability and also has sufficient heat-resistant storage stability. The toner for electrostatic image development includes toner particles containing an amorphous resin including amorphous resins A and B and a crystalline polyester resin. The toner particles have a domain-matrix structure in which a domain phase including fine core particles of the crystalline polyester resin is dispersed in a matrix phase formed of the amorphous resin A composed of a vinyl-based polymer. The surface of the fine core particles of the crystalline polyester resin is coated with the amorphous resin B composed of a vinyl-based polymer.
    Type: Application
    Filed: May 21, 2014
    Publication date: November 27, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Aya SHIRAI, Hiroshi Nagasawa, Kaori Matsushima, Masahiro Matsuoka, Takaki Kawamura, Taiki Amemiya
  • Publication number: 20140287354
    Abstract: Provided is a toner for electrostatic image development, having low-temperature fixability and long-term stable charge property and also having heat-resistant storage stability. The toner for electrostatic image development includes toner particles containing a binder resin. The binder resin has a domain-matrix structure in which a crystalline polyester resin is dispersed as a domain phase in a matrix phase formed of an amorphous vinyl polymer formed using at least a vinyl-based monomer. The amorphous vinyl polymer has a carboxy group concentration of not less than 0.2 mmol/g and not more than 1.0 mmol/g, and the crystalline polyester resin has an ester group concentration of not less than 0.1 mmol/g and not more than 7.1 mmol/g.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Takaki KAWAMURA, Hiroshi NAGASAWA, Kaori MATSUSHIMA, Masahiro MATSUOKA, Aya SHIRAI, Taiki AMEMIYA
  • Patent number: 8568947
    Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: October 29, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yohei Ohno, Hajime Tadokoro, Kaori Matsushima, Hiroyuki Yasukawa, Ito Koga
  • Patent number: 8557490
    Abstract: Disclosed is a cyan toner for developing an electrostatic image containing a cyan colorant, and the cyan colorant comprises colorant compound X represented by Formula (1) and colorant compound Y represented by Formula (2). wherein M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent, wherein, M2 is Zn or Al, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: October 15, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroyuki Yasukawa, Hajime Tadokoro, Kaori Matsushima, Ito Koga, Yohei Ohno
  • Publication number: 20120219892
    Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 30, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yohei OHNO, Hajime TADOKORO, Kaori MATSUSHIMA, Hiroyuki YASUKAWA, Ito KOGA
  • Publication number: 20120045718
    Abstract: Disclosed is a cyan toner for developing an electrostatic image containing a cyan colorant, and the cyan colorant comprises colorant compound X represented by Formula (1) and colorant compound Y represented by Formula (2). wherein M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent, wherein, M2 is Zn or Al, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 23, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Hajime TADOKORO, Kaori MATSUSHIMA, Ito KOGA, Yohei OHNO