Patents by Inventor Kazunori Noguchi

Kazunori Noguchi 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: 20190355504
    Abstract: The invention provides a method for manufacturing a powder magnetic core through simple compression molding and capable of manufacturing a complicatedly shaped powder magnetic core with reliable high strength and insulating properties. The invention is directed to a method for manufacturing a powder magnetic core with a metallic soft magnetic material powder, the method including: a first step including mixing a soft magnetic material powder and a binder; a second step including compression molding the mixture obtained after the first step; a third step including performing at least one of grinding and cutting on the compact obtained after the second step; and a fourth step including heat-treating the compact after the third step, wherein in the fourth step, the compact is heat-treated so that an oxide layer containing an element constituting the soft magnetic material powder is formed on the surface of the soft magnetic material powder.
    Type: Application
    Filed: June 4, 2019
    Publication date: November 21, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Kazunori NISHIMURA, Shin NOGUCHI, Toshio MIHARA
  • Publication number: 20190355503
    Abstract: The invention provides a powder magnetic core and a method for manufacturing a powder magnetic core through simple compression molding and capable of manufacturing a complicatedly shaped powder magnetic core with reliable high strength and insulating properties. A method for manufacturing a powder magnetic core with a metallic soft magnetic material powder includes: a first step including mixing a soft magnetic material powder and a binder; a second step including compression molding the mixture obtained after the first step; a third step including performing at least one of grinding and cutting on the compact obtained after the second step; and a fourth step including heat-treating the compact after the third step, wherein in the fourth step, the compact is heat-treated so that an oxide layer containing an element constituting the soft magnetic material powder is formed on the surface of the soft magnetic material powder.
    Type: Application
    Filed: June 4, 2019
    Publication date: November 21, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Kazunori NISHIMURA, Shin Noguchi, Toshio Mihara
  • Patent number: 10468174
    Abstract: Provided are a magnetic core having a high initial permeability and a coil component including the same. The magnetic core has an X-ray diffraction spectrum of the magnetic core measured using Cu-K? characteristic X-rays, wherein a peak intensity ratio (P1/P2) of a peak intensity P1 of a diffraction peak of an Fe oxide having a corundum structure appearing in a vicinity of 2?=33.2° to a peak intensity P2 of a diffraction peak of the Fe-based alloy having a bcc structure appearing in a vicinity of 2?=44.7° is 0.015 or less; and in the X-ray diffraction spectrum, a peak intensity ratio (P3/P2) of a peak intensity P3 of a superlattice peak of an Fe3Al ordered structure appearing in a vicinity of 2?=26.6° to the peak intensity P2 is 0.015 or more and 0.050 or less.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: November 5, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Toshio Mihara, Tetsuroh Katoh, Kazunori Nishimura, Shin Noguchi
  • Patent number: 10452021
    Abstract: A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm3, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Miura, Shuhei Iwasaki, Akira Sakakibara, Tatsuya Yamaai, Kazunori Noguchi, Harunobu Ogaki, Kazunari Hagiwara, Yuji Kawaguchi
  • Patent number: 10453599
    Abstract: There is provided a magnetic core having high manufacturability and high magnetic permeability, to provide a method for manufacturing such a magnetic core, and to provide a coil component having such a magnetic core. The invention is directed to a magnetic core including: Fe-based soft magnetic alloy particles; and an oxide phase existing between the Fe-based soft magnetic alloy particles, wherein the Fe-based soft magnetic alloy particles include Fe—Al—Cr alloy particles and Fe—Si—Al alloy particles.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: October 22, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Shin Noguchi, Kazunori Nishimura, Toshio Mihara
  • Patent number: 10418160
    Abstract: Provided are: a metal powder core having a configuration suitable for core loss reduction and strength improvement; a coil component employing this; and a fabrication method for metal powder core. The metal powder core is obtained by dispersing Cu powder among soft magnetic material powder comprising pulverized powder of Fe-based soft magnetic alloy and atomized powder of Fe-based soft magnetic alloy and then by performing compaction. The fabrication method for metal powder core includes: a mixing step of mixing together soft magnetic material powder containing thin-leaf shaped pulverized powder of Fe-based soft magnetic alloy and atomized powder of Fe-based soft magnetic alloy, Cu powder, and a binder and thereby obtaining a mixture; a forming step of performing pressure forming on the mixture obtained at the mixing step; and a heat treatment step of annealing a formed article obtained at the forming step.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: September 17, 2019
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tetsuro Kato, Shin Noguchi, Kazunori Nishimura
  • Publication number: 20190272937
    Abstract: A magnetic core has a high initial permeability and a small core loss, reducing a core loss at high frequencies; and a coil component including the same. This magnetic core is formed by binding a plurality of Fe-based alloy particles containing Al via an oxide layer containing an Fe oxide. In an X-ray diffraction spectrum of the magnetic core measured using Cu-K? characteristic X-rays, a peak intensity ratio (P1/P2) of peak intensity P1 of a diffraction peak derived from the Fe oxide having a corundum structure appearing in the vicinity of 2?=33.2° to peak intensity P2 of a diffraction peak derived from the Fe-based alloy having a bcc structure appearing in the vicinity of 2?=44.7° is 0.010 or less (excluding 0). A superlattice peak intensity of an Fe3Al ordered structure is at most a noise level within a range of 2?=20° to 40°.
    Type: Application
    Filed: September 15, 2017
    Publication date: September 5, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Toshio MIHARA, Tetsuroh KATOH, Kazunori NISHIMURA, Shin NOGUCHI
  • Publication number: 20190228897
    Abstract: Provided are a magnetic core having a high initial permeability and a coil component including the same. The magnetic core has an X-ray diffraction spectrum of the magnetic core measured using Cu-K? characteristic X-rays, wherein a peak intensity ratio (P1/P2) of a peak intensity P1 of a diffraction peak of an Fe oxide having a corundum structure appearing in a vicinity of 2?=33.2° to a peak intensity P2 of a diffraction peak of the Fe-based alloy having a bcc structure appearing in a vicinity of 2?=44.7° is 0.015 or less; and in the X-ray diffraction spectrum, a peak intensity ratio (P3/P2) of a peak intensity P3 of a superlattice peak of an Fe3Al ordered structure appearing in a vicinity of 2?=26.6° to the peak intensity P2 is 0.015 or more and 0.050 or less.
    Type: Application
    Filed: September 15, 2017
    Publication date: July 25, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Toshio MIHARA, Tetsuroh KATOH, Kazunori NISHIMURA, Shin NOGUCHI
  • Patent number: 10354790
    Abstract: An object of the invention is to provide a method that is for manufacturing a powder magnetic core through simple compression molding and capable of manufacturing a complicatedly shaped powder magnetic core with reliable high strength and insulating properties. The invention is directed to a method for manufacturing a powder magnetic core with a metallic soft magnetic material powder, the method including: a first step including mixing a soft magnetic material powder and a binder; a second step including compression molding the mixture obtained after the first step; a third step including performing at least one of grinding and cutting on the compact obtained after the second step; and a fourth step including heat-treating the compact after the third step, wherein in the fourth step, the compact is heat-treated so that an oxide layer containing an element constituting the soft magnetic material powder is formed on the surface of the soft magnetic material powder.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: July 16, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Kazunori Nishimura, Shin Noguchi, Toshio Mihara
  • Patent number: 10331052
    Abstract: An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a polyester resin having a specific structure.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: June 25, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Takeshi Murakami, Nobuhiro Nakamura, Atsushi Okuda, Harunobu Ogaki
  • Patent number: 10312004
    Abstract: In a metal powder core constructed from soft magnetic material powder and a coil component employing this, a configuration suitable for reduction of a core loss is provided. The metal powder core constructed from soft magnetic material powder is characterized in that Cu is dispersed among the soft magnetic material powder. It is characterized in that, preferably, the soft magnetic material powder is pulverized powder of soft magnetic alloy ribbon and that Cu is dispersed among the pulverized powder of soft magnetic alloy ribbon. Further, it is characterized in that, preferably, the soft magnetic alloy ribbon is a Fe-based nano crystal alloy ribbon or a Fe-based alloy ribbon showing a Fe-based nano crystalline structure and that the pulverized powder has a nano crystalline structure.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: June 4, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Tetsuro Kato, Shin Noguchi, Kazunori Nishimura
  • Publication number: 20190163118
    Abstract: Provided are a process cartridge and an electrophotographic apparatus each suppressed in fluctuation in charging potential at the time of its long-term use. The process cartridge includes: an electrophotographic photosensitive member having a surface layer containing a resin and a charge-transporting substance; and a charging member configured to charge the electrophotographic photosensitive member, wherein an average of Martens hardnesses of the surface layer of the electrophotographic photosensitive member measured at a pushing force of 7 mN is 245 N/mm2 or more, and wherein in a core defined by three-dimensional surface texture standards (ISO 25178-2:2012) of the surface of the charging member, an average of Martens hardnesses measured at a pushing force of 0.04 mN is 2 N/mm2 or more and 20 N/mm2 or less, and an average of adhesivenesses measured with a scanning probe microscope in a field of view of 2-micrometer square is 70 mV or less.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Inventors: Shuhei Iwasaki, Kazunori Noguchi, Harunobu Ogaki, Tatsuya Yamaai, Daisuke Miura, Akira Sakakibara, Takumi Furukawa, Yuya Tomomizu
  • Publication number: 20190163119
    Abstract: Provided is a process cartridge having a charging member and an electrophotographic photosensitive member to be charged by being in contact with the charging member, wherein the electrophotographic photosensitive member has a support and a photosensitive layer in this order, and a surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Inventors: Tatsuya Yamaai, Kazunori Noguchi, Shuhei Iwasaki, Akira Sakakibara, Daisuke Miura, Harunobu Ogaki, Takumi Furukawa, Yuya Tomomizu
  • Publication number: 20190163120
    Abstract: A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm3, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Inventors: Daisuke Miura, Shuhei Iwasaki, Akira Sakakibara, Tatsuya Yamaai, Kazunori Noguchi, Harunobu Ogaki, Kazunari Hagiwara, Yuji Kawaguchi
  • Patent number: 10114301
    Abstract: An electrophotographic photoreceptor abuts against a charging member and/or a developer carrying member with an abutting member therebetween, has a first portion and a second portion abutting against the abutting member along the longitudinal direction of the photoreceptor, and includes a support, a charge generating layer containing a charge generation material, and a surface layer in this order. The first portion includes an undercoat layer containing a polymer of a composition containing an electron transport material and a crosslinking agent and being contiguous with the surface of the charge generating layer facing the support. The second portion includes (i) an intermediate layer being disposed between and being contiguous with the support and the charge generating layer and/or (ii) an intermediate layer being disposed between and being contiguous with the charge generating layer and the surface layer, wherein the intermediate layers each have a Martens hardness of 500 N/mm2 or less.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: October 30, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Yuka Ishiduka, Atsushi Fujii, Akihiro Maruyama, Kazunori Noguchi, Nobuhiro Nakamura, Yuki Yamamoto, Kazuko Araki, Tatsuya Ikezue
  • Patent number: 10067432
    Abstract: An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a specific polyester resin having a structure including a specific branched chain.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: September 4, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Harunobu Ogaki, Kazumichi Sugiyama
  • Patent number: 10031430
    Abstract: An electrophotographic photosensitive member including a surface layer containing a specific polyester resin is provided. The polyester resin contains specific structures.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 24, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Harunobu Ogaki, Kazunori Noguchi, Kazumichi Sugiyama
  • Publication number: 20180175333
    Abstract: A battery includes: an electrode body; and a battery can configured to accommodate the electrode body and include a bottom part. At least one surface of the bottom part has two or more grooves on a same circumference, a proportion of an inner diameter of the groove to an outer diameter of the bottom part is 44% or more, and a proportion of a total value of intervals of the grooves to a perimeter of the circumference is 2% or more and 24% or less.
    Type: Application
    Filed: May 18, 2016
    Publication date: June 21, 2018
    Inventors: Kunio SODEYAMA, Takao MORI, Masafumi UMEKAWA, Kazunori NOGUCHI
  • Publication number: 20180173121
    Abstract: An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a polyester resin having a specific structure.
    Type: Application
    Filed: December 14, 2017
    Publication date: June 21, 2018
    Inventors: Kazunori Noguchi, Takeshi Murakami, Nobuhiro Nakamura, Atsushi Okuda, Harunobu Ogaki
  • Patent number: 9971257
    Abstract: An electrophotographic photosensitive member including a surface layer containing a charge generating material and a polyester resin is provided. The polyester resin contains a structure having a 12- or higher-membered cycloalkylene group.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumichi Sugiyama, Kazunori Noguchi, Harunobu Ogaki