Patents by Inventor Noriaki Kuroda

Noriaki Kuroda 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: 11448996
    Abstract: An imaging system includes an image carrier to carry a toner image, a coating roller to transfer a lubricant from a lubricant source to a surface of the image carrier, the coating roller being disposed adjacent to the image carrier to receive a toner from the image carrier, and a toner adjustment element to adjust a toner amount of the coating roller in an axial direction of the coating roller.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: September 20, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Yoichi Yoshida, Koichiro Takashima, Noriaki Kuroda
  • Publication number: 20220137527
    Abstract: A charging roller includes a conductive support, and a roller body to rotate about the conductive support. The roller body includes a conductive elastic layer to contact the conductive support, and a conductive resin layer located around the conductive elastic layer to form a surface of the roller body. The surface has ten-point average roughness Rzjis of approximately 20 ?m to 30 ?m. The conductive resin layer contains polyrotaxane.
    Type: Application
    Filed: July 17, 2020
    Publication date: May 5, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventor: Noriaki Kuroda
  • Publication number: 20220057742
    Abstract: An imaging system includes an image carrier to carry a toner image, a coating roller to transfer a lubricant from a lubricant source to a surface of the image carrier, the coating roller being disposed adjacent to the image carrier to receive a toner from the image carrier, and a toner adjustment element to adjust a toner amount of the coating roller in an axial direction of the coating roller.
    Type: Application
    Filed: April 17, 2019
    Publication date: February 24, 2022
    Inventors: Yoichi YOSHIDA, Koichiro TAKASHIMA, Noriaki KURODA
  • Patent number: 10761448
    Abstract: A charging roller has a curved roller surface, and the shape of the roller surface is represented by Y/Y1=(X/X1)exp(?). A distance between a central portion of the roller body and a first arbitrary point on a rotation axis is denoted by X, a reduction in a radius at the first arbitrary point from the maximum radius at the central portion is denoted by Y, a distance between the central portion and a second arbitrary point on the rotation axis is denoted by X1, and a reduction in the radius at the second arbitrary point from the maximum radius at the central portion is denoted by Y1. The second arbitrary point is closer to an end portion of the roller body than the first arbitrary point.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: September 1, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Noriaki Kuroda
  • Patent number: 10599062
    Abstract: An example charging member includes a conductive support, a conductive elastic body layer laminated on the conductive support, and a conductive resin layer laminated as an outermost layer on the conductive elastic body layer. The conductive resin layer may contain a matrix material and resin particles. The conductive resin layer may have an arithmetic average roughness Ra of 2.0 to 7.0 ?m, a 10-point average roughness Rzjis of 15 to 40 ?m, and a skewness Rsk of 0.5 to 2.5.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: March 24, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.
    Inventor: Noriaki Kuroda
  • Publication number: 20200073272
    Abstract: A charging roller has a curved roller surface, and the shape of the roller surface is represented by Y/Y1=(X/X1)exp(?). A distance between a central portion of the roller body and a first arbitrary point on a rotation axis is denoted by X, a reduction in a radius at the first arbitrary point from the maximum radius at the central portion is denoted by Y, a distance between the central portion and a second arbitrary point on the rotation axis is denoted by X1, and a reduction in the radius at the second arbitrary point from the maximum radius at the central portion is denoted by Y1. The second arbitrary point is closer to an end portion of the roller body than the first arbitrary point.
    Type: Application
    Filed: October 18, 2019
    Publication date: March 5, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Noriaki KURODA
  • Patent number: 10520845
    Abstract: Provided are a charging member coupleable to an electrophotographic imaging apparatus. The charging member includes an electrically-conductive support body, an electrically-conductive elastomer layer stacked on a surface of the electrically-conductive support body, and an electrically-conductive resin layer stacked as an outermost layer on the electrically-conductive elastomer layer. The electrically-conductive resin layer includes a binder resin and particles comprising at least one type of particles selected from resin particles and inorganic particles, wherein a relative dielectric constant (?r1) of the binder resin is greater than or about equal to a relative dielectric constant (?r2) of at least one type of particles.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: December 31, 2019
    Assignee: HP PRINTING KOREA CO., LTD.
    Inventor: Noriaki Kuroda
  • Patent number: 10488778
    Abstract: A charging roller includes a curved roller surface, and the shape of the roller surface is represented by Y/Y1=(X/X1)exp(?). A distance between a middle point and an arbitrary point on a rotation axis is denoted by X, a reduction in a radius at the arbitrary point from the maximum radius at the middle point is denoted by Y, a distance between the middle point and the position of an end portion of a roller body on the rotation axis is denoted by X1, and a reduction in the radius at the position of the end portion from the maximum radius at the middle point is denoted by Y1.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: November 26, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Noriaki Kuroda
  • Publication number: 20190271931
    Abstract: An example charging member includes a conductive support, a conductive elastic body layer laminated on the conductive support, and a conductive resin layer laminated as an outermost layer on the conductive elastic body layer. The conductive resin layer may contain a matrix material and resin particles. The conductive resin layer may have an arithmetic average roughness Ra of 2.0 to 7.0 ?m, a 10-point average roughness Rzjis of 15 to 40 ?m, and a skewness Rsk of 0.5 to 2.5.
    Type: Application
    Filed: May 21, 2019
    Publication date: September 5, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Noriaki KURODA
  • Publication number: 20190212669
    Abstract: A charging roller includes a curved roller surface, and the shape of the roller surface is represented by Y/Y1=(X/X1)exp(?). A distance between a middle point and an arbitrary point on a rotation axis is denoted by X, a reduction in a radius at the arbitrary point from the maximum radius at the middle point is denoted by Y, a distance between the middle point and the position of an end portion of a roller body on the rotation axis is denoted by X1, and a reduction in the radius at the position of the end portion from the maximum radius at the middle point is denoted by Y1.
    Type: Application
    Filed: December 18, 2018
    Publication date: July 11, 2019
    Applicant: HEWLETT-PACKARD DEV ELOMENT COMPANY, L.P.
    Inventor: Noriaki KURODA
  • Publication number: 20180275551
    Abstract: Provided are a charging member coupleable to an electrophotographic imaging apparatus. The charging member includes an electrically-conductive support body, an electrically-conductive elastomer layer stacked on a surface of the electrically-conductive support body, and an electrically-conductive resin layer stacked as an outermost layer on the electrically-conductive elastomer layer. The electrically-conductive resin layer includes a binder resin and particles comprising at least one type of particles selected from resin particles and inorganic particles, wherein a relative dielectric constant (?r1) of the binder resin is greater than or about equal to a relative dielectric constant (?r2) of at least one type of particles.
    Type: Application
    Filed: May 25, 2018
    Publication date: September 27, 2018
    Applicant: S-PRINTING SOLUTION CO., LTD.
    Inventor: Noriaki Kuroda
  • Patent number: 9703226
    Abstract: A charging member, one embodiment of which includes a conductive support; a conductive elastomer layer stacked on the conductive support; and a conductive resin layer stacked on the conductive elastomer layer, wherein the conductive resin layer includes: a matrix material; and a plurality of particles dispersed in the matrix material, wherein the particles include first particles, and when a thickness of a portion formed of the matrix material alone of the conductive resin layer is referred to as A [?m], an average particle size of the first particles is referred to as B1 [?m], and an interparticle distance of the particles is referred to as Sm [?m], then A is in a range of 1.0 ?m to 7.0 ?m, B1/A is in a range of 5.0 to 30.0, and Sm is in a range of 50 ?m to 400 ?m.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: July 11, 2017
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventor: Noriaki Kuroda
  • Patent number: 9556359
    Abstract: Provided is a method of producing a member for electrophotography capable of providing a high-quality electrophotographic image.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: January 31, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriko Suzumura, Noriyuki Doi, Hiroki Masu, Masataka Kodama, Masahiro Kurachi, Noriaki Kuroda
  • Publication number: 20160266511
    Abstract: A charging member, one embodiment of which includes a conductive support; a conductive elastomer layer stacked on the conductive support; and a conductive resin layer stacked on the conductive elastomer layer, wherein the conductive resin layer includes: a matrix material; and a plurality of particles dispersed in the matrix material, wherein the particles include first particles, and when a thickness of a portion formed of the matrix material alone of the conductive resin layer is referred to as A [?m], an average particle size of the first particles is referred to as B1 [?m], and an interparticle distance of the particles is referred to as Sm [?m], then A is in a range of 1.0 ?m to 7.0 ?m, B1/A is in a range of 5.0 to 30.0, and Sm is in a range of 50 ?m to 400 ?m.
    Type: Application
    Filed: May 18, 2016
    Publication date: September 15, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Noriaki KURODA
  • Patent number: 9372428
    Abstract: Provided is a charging member having a rough surface, thereby suppressing adhesion of dirt on the surface. A charging member having a supporting member, an elastic layer and a surface layer, in which the surface layer contains a polymer compound, which has a Si—O-M bond and at least one structural unit selected from structural units represented by the following general formula (1) and the following general formula (2), and has a structural unit represented by the following general formula (3); the charging member has cracks developing from the surface thereof and reaching the elastic layer; and the cracks each have convexly raised edges, by which the surface thereof is roughened.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: June 21, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriaki Kuroda, Noriko Nagamine, Yuya Tomomizu
  • Patent number: 9081321
    Abstract: There is provided a charging member having charging performance that is not easily changed even by long-term use. The charging member includes an electro-conductive support, an elastic layer, and a surface layer. The elastic layer contains particles in such a manner that at least a part of the particles are exposed from the elastic layer, and thus a surface of the elastic layer is roughened. The particles are high-molecular-weight polyethylene particles. The surface of the elastic layer is covered with the surface layer in such a manner that the surface shape of the elastic layer is reflected in the surface shape of the charging member. The surface layer contains a high-molecular compound having a specific constitutional unit.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: July 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Kodama, Taichi Sato, Noriko Suzumura, Noriyuki Doi, Masahiro Kurachi, Hiroki Masu, Noriaki Kuroda
  • Patent number: 8870728
    Abstract: Provided are a charging member capable of maintaining excellent wear resistance even after repeated use, and a process cartridge and an electrophotographic apparatus each having the charging member. The charging member is characterized in that its surface layer has a polysiloxane to which a silsesquioxane is bonded.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: October 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoko Kuruma, Noriaki Kuroda, Noriko Nagamine
  • Patent number: 8755714
    Abstract: A charging member is provided with a surface layer that can not easily wear even due to its contact with a photosensitive member and also has an appropriate elasticity contributing to the formation of an appropriate nip between it and the photosensitive member.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: June 17, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noriko Nagamine, Noriaki Kuroda, Yuya Tomomizu
  • Publication number: 20140080691
    Abstract: The present invention provides a charging member that suppresses abnormal discharge which induces charging unevenness, and that has little contamination on a surface layer, to thereby enable uniform charging over a long period. The charging member includes a substrate, an elastic layer and a surface layer, wherein the surface layer contains a polymer compound having constitutional units represented by the following general formula (1), chemical formula (2) and general formula (3), and having a Si—O—Ti bond, a Ti—O-M bond and a Si—O-M bond. M is any atom selected from the group consisting of V, Nb and W.
    Type: Application
    Filed: November 14, 2013
    Publication date: March 20, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masahiro Kurachi, Masataka Kodama, Noriyuki Doi, Noriko Suzumura, Hiroki Masu, Noriaki Kuroda
  • Publication number: 20140072343
    Abstract: Provided is a charging member whose surface is suppressed to adhesion of toner or an external additive and is not contaminated easily, and which is less likely to occur a track due to the contact between the charging member and a photosensitive member in an electrophotographic image. The charging member comprises a support, an elastic layer, and a surface layer, wherein the surface layer comprises: a constitutional unit represented by the following general formula (1); a constitutional unit represented by the following general formula (2); a polymer compound having a bond of Si—O—Ti; and phenyl-modified silicone oil having a particular structure.
    Type: Application
    Filed: November 19, 2013
    Publication date: March 13, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroki Masu, Masataka Kodama, Noriyuki Doi, Noriko Suzumura, Masahiro Kurachi, Noriaki Kuroda