Patents by Inventor Naohiko Tsuchida

Naohiko Tsuchida 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: 20150017581
    Abstract: Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 ?m to 0.15 ?m, and a relationship between the number-average particle diameter (?m) of the magnetic iron oxide particle and the specific surface area (m2/g) of the magnetic iron oxide particle satisfies Expression (1) below. [Number?average particle diameter]×[specific surface area]?1.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 15, 2015
    Inventors: Naohiko Tsuchida, Wakashi Iida, Yoshihiro Ogawa, Toru Takahashi, Daisuke Tsujimoto
  • Publication number: 20150004541
    Abstract: A toner comprising a binder resin and a wax, wherein the binder resin contains a binder resin A and a binder resin B, the binder resin A has a softening point of at least 120° C. and not more than 150° C., has a polyester unit, and has a terminal of which a first aliphatic compound having a melting point of 60° C. or more and not more than 85° C. has been condensed, and the binder resin B has a softening point of at least 80° C. and not more than 115° C., has a polyester unit, and has a terminal of which a second aliphatic compound having a melting point of 90° C. or more and not more than 120° C. has been condensed.
    Type: Application
    Filed: June 19, 2014
    Publication date: January 1, 2015
    Inventors: Toru Takahashi, Yoshihiro Ogawa, Daisuke Tsujimoto, Naohiko Tsuchida, Wakashi Iida
  • Publication number: 20140004460
    Abstract: A toner is provided in which low-temperature fixing properties and high-temperature offset resistance can be compatible, and the environmental stability of image density can also be obtained. A toner obtained by condensation polymerization of an alcohol component containing not less than 70 mol % of an aliphatic polyalcohol with a carboxylic acid component, and including a polyester resin having a concentration of an ester group of not less than 25% by mass and not more than 55% by mass, and a compound represented by the following formula (1) as a charge-controlling agent: (wherein A1, A2, and A3 each independently represent H, a nitro group, or a halogen atom; B1 represents H or an alkyl group; M represents an Fe atom, a Cr atom, or an Al atom; X+ represents a H ion, an alkali metal ion, a NH4 ion, an alkylammonium ion, or mixed ions thereof.
    Type: Application
    Filed: March 21, 2012
    Publication date: January 2, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yoshiba, Yoshihiro Ogawa, Kouji Nishikawa, Shigeto Tamura, Naohiko Tsuchida, Masami Fujimoto