Patents by Inventor Yohei Miyauchi

Yohei Miyauchi 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: 10983466
    Abstract: Provided is a fixing member including a base layer, and a surface layer on an outer surface of the base layer directly or with a primer layer interposed between the base layer and the surface layer, in which the surface layer is constituted by a single layer, the surface layer contains a fluororesin, and fluorine oil having a perfluoropolyether structure, and as for a measurement sample taken from the surface layer, when subjecting to predetermined treatments (i) and (ii), masses of an adhered material adhered in a unit area of a detection surface of a QCM sensor and containing the fluorine oil are within specific ranges.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: April 20, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
  • Publication number: 20210054300
    Abstract: Provided is a lubricant composition having small shear rate dependence of its apparent viscosity. The lubricant composition includes a perfluoropolyether as a base oil, and fluorine resin particles as a thickener. The lubricant composition further includes a fluorine-containing polymer having a tetrafluoroethylene structure under a state in which the polymer is dissolved in the perfluoropolyether.
    Type: Application
    Filed: August 4, 2020
    Publication date: February 25, 2021
    Inventors: Yoshihito Oshima, Yohei Miyauchi, Yasuharu Notoya
  • Patent number: 10901354
    Abstract: Provided is a fixing member in which hot offset of a toner is difficult to be generated. The fixing member has a substrate and a release layer as a surface layer, wherein the release layer includes PFPE and a second fluororesin, the second fluororesin being at least one selected from PFA and FEP, and in a 19F-NMR spectrum of the release layer measured at a temperature of 200° C., a relaxation time T1 of longitudinal relaxation of a peak derived from PFPE is 0.5 seconds or more and 3.5 seconds or less.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: January 26, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuharu Notoya, Yohei Miyauchi, Kimihiro Yoshimura
  • Publication number: 20210003953
    Abstract: Provided is a fixing member for electrophotography having excellent toner releasability even when used for a long time period. The fixing member includes a base layer, an elastic layer, and a surface layer in the stated order. The surface layer contains a fluorine resin and a fluorine oil having a perfluoropolyether structure. The mass P11 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of a QCM sensor when a measurement sample collected from the surface layer is subjected to a predetermined treatment (i), is 1.0×102 ng or more and 1.0×104 ng or less, and the mass P12 of an adhered substance including the fluorine oil, adhered in the unit area of the detection surface of the QCM sensor when the sample is subjected to a predetermined treatment (ii), is 0.5×P11 or more and 1.2×P11 or less.
    Type: Application
    Filed: September 15, 2020
    Publication date: January 7, 2021
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
  • Publication number: 20200409294
    Abstract: Provided is a fixing member including a base layer, and a surface layer on an outer surface of the base layer directly or with a primer layer interposed between the base layer and the surface layer, in which the surface layer is constituted by a single layer, the surface layer contains a fluororesin, and fluorine oil having a perfluoropolyether structure, and as for a measurement sample taken from the surface layer, when subjecting to predetermined treatments (i) and (ii), masses of an adhered material adhered in a unit area of a detection surface of a QCM sensor and containing the fluorine oil are within specific ranges.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
  • Patent number: 10739712
    Abstract: Provided is a fixing member having an outer surface including excellent toner releasability and excellent scratch resistance, wherein the fixing member has a base material, an elastic layer, and a release layer in this order, the release layer including a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, and has a loss tangent at a frequency of 10 Hz and 180° C. of 5.0×10?2 or more and 3.0×10?1 or less.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: August 11, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
  • Patent number: 10649352
    Abstract: To provide an electrophotographic member high in volume resistivity uniformity even in application of a high voltage such as 1,000 V. The electrophotographic member includes a base material and an elastic layer on the base material, the elastic layer containing a silicone rubber and an ionic liquid, and the ionic liquid including a cation modified by a dimethylsiloxane chain, and an anion.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: May 12, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasutomo Tsuji, Yohei Miyauchi, Toshio Tanaka
  • Publication number: 20190294090
    Abstract: Provided is a fixing member in which hot offset of a toner is difficult to be generated. The fixing member has a substrate and a release layer as a surface layer, wherein the release layer includes PFPE and a second fluororesin, the second fluororesin being at least one selected from PFA and FEP, and in a 19F-NMR spectrum of the release layer measured at a temperature of 200° C., a relaxation time T1 of longitudinal relaxation of a peak derived from PFPE is 0.5 seconds or more and 3.5 seconds or less.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 26, 2019
    Inventors: Yasuharu Notoya, Yohei Miyauchi, Kimihiro Yoshimura
  • Publication number: 20190294089
    Abstract: Provided is a fixing member having an outer surface including excellent toner releasability and excellent scratch resistance, wherein the fixing member has a base material, an elastic layer, and a release layer in this order, the release layer including a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, and has a loss tangent at a frequency of 10 Hz and 180° C. of 5.0×10?2 or more and 3.0×101 or less.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 26, 2019
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Kimihiro Yoshimura
  • Publication number: 20180329319
    Abstract: To provide an electrophotographic member high in volume resistivity uniformity even in application of a high voltage such as 1,000 V. The electrophotographic member includes a base material and an elastic layer on the base material, the elastic layer containing a silicone rubber and an ionic liquid, and the ionic liquid including a cation modified by a dimethylsiloxane chain, and an anion.
    Type: Application
    Filed: May 1, 2018
    Publication date: November 15, 2018
    Inventors: Yasutomo Tsuji, Yohei Miyauchi, Toshio Tanaka
  • Patent number: 9791792
    Abstract: An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: October 17, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Miyauchi, Kimihiro Yoshimura, Harunobu Ogaki, Atsushi Okuda, Yuki Yamamoto, Wataru Kitamura, Mai Murakami
  • Patent number: 9657153
    Abstract: An object of the present invention is to provide a porous material (resin composition) having high heat insulation properties, mechanical properties, and electrical properties by controlling function of a porous film by setting a porosity size, distribution of the porosity size, and a porosity ratio of the porous film in predetermined ranges. The resin composition according to the present invention is comprised of an engineering plastic having porous structure in which not less than 80% of a total porosity is comprised of independent porosities, a mean porosity size is not less than 0.01 ?m and not more than 0.9 ?m, and not less than 80% of the total porosity has a porosity size within ±30% of the mean porosity size.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: May 23, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Miyauchi, Naotake Sato, Yuichi Hashimoto, Toshihiro Kikuchi
  • Patent number: 9575422
    Abstract: Provided are a method of producing an electrophotographic photosensitive member, particularly, a method of producing an electrophotographic photosensitive member and an organic device by which, in a method of forming a charge transporting layer, the stability of an application liquid for the layer after long-term storage is improved while the usage of an organic solvent in the application liquid is curtailed, and the layer having high uniformity is formed. The method is a method of producing an electrophotographic photosensitive member which includes a support and a charge transporting layer formed thereon, the method including: preparing a solution including: a first liquid whose solubility in water under 25° C. and 1 atmosphere is 1.0 mass % or less; a second liquid whose solubility in water under 25° C. and 1 atmosphere is 5.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: February 21, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Keiko Yamagishi, Harunobu Ogaki, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
  • Patent number: 9494882
    Abstract: The invention has a process of preparing a dispersion liquid by dispersing particles containing a charge transporting substance and a binder resin in liquid medium containing a specific liquid to prepare a dispersion liquid and a process of forming a coat of the dispersion liquid, and heating and drying the coat to dissolve the particles containing the charge transporting substance and the binder resin with liquid medium to form a charge transporting layer.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: November 15, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiko Yamagishi, Harunobu Ogaki, Kimihiro Yoshimura, Hiroki Uematsu, Yohei Miyauchi, Atsushi Okuda
  • Publication number: 20160327876
    Abstract: An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.
    Type: Application
    Filed: April 18, 2016
    Publication date: November 10, 2016
    Inventors: Yohei Miyauchi, Kimihiro Yoshimura, Harunobu Ogaki, Atsushi Okuda, Yuki Yamamoto, Wataru Kitamura, Mai Murakami
  • Patent number: 9341964
    Abstract: In a process for producing an electrophotographic photosensitive member, in particular, a process of forming a charge transporting layer, a production process is provided by which the stability of a charge transporting layer coating fluid even after its storage for a long time is improved so as to form a coat for a charge transporting layer having a high uniformity.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: May 17, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Harunobu Ogaki, Keiko Yamagishi, Atsushi Okuda, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
  • Patent number: 9282615
    Abstract: A method for producing an electrophotographic photosensitive member has a charge transporting layer, including preparing a first solution containing a specified first liquid, a charge transporting substance and a binder resin, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer, and a method for producing an organic device has a charge transporting layer, including preparing a first solution containing a specified first liquid and a charge transporting substance, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer are used.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: March 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Keiko Yamagishi, Atsushi Okuda, Kimihiro Yoshimura, Harunobu Ogaki, Yohei Miyauchi, Hiroki Uematsu
  • Patent number: 9158214
    Abstract: There are provided an electrophotographic photosensitive member and an intermediate transfer member each having good lubricity and good cleaning property on its surface, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and an electrophotographic apparatus including the intermediate transfer member. Therefore, a surface layer of the electrophotographic photosensitive member or intermediate transfer member of the present invention contains a matrix component and a rotatably-retained spherical particle that is not bound with the matrix component and is rotatably retained in a pore in the matrix component.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: October 13, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kimihiro Yoshimura, Yohei Miyauchi, Keiko Yamagishi, Kazuhisa Shirayama, Maho Hori
  • Patent number: 9104124
    Abstract: The present invention relates to an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support. The electrophotographic photosensitive member has a surface layer containing a polyarylate resin and acicular inorganic fillers. The acicular inorganic fillers are basic and have a number-average aspect ratio of 5 to 50 and a Mohs hardness of 2 to 6.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: August 11, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Maho Hori, Kimihiro Yoshimura, Yohei Miyauchi, Kazuhisa Shirayama
  • Publication number: 20150197616
    Abstract: An object of the present invention is to provide a porous material (resin composition) having high heat insulation properties, mechanical properties, and electrical properties by controlling function of a porous film by setting a porosity size, distribution of the porosity size, and a porosity ratio of the porous film in predetermined ranges. The resin composition according to the present invention is comprised of an engineering plastic having porous structure in which not less than 80% of a total porosity is comprised of independent porosities, a mean porosity size is not less than 0.01 ?m and not more than 0.9 ?m, and not less than 80% of the total porosity has a porosity size within ±30% of the mean porosity size.
    Type: Application
    Filed: March 24, 2015
    Publication date: July 16, 2015
    Inventors: Yohei Miyauchi, Naotake Sato, Yuichi Hashimoto, Toshihiro Kikuchi