Patents by Inventor Kineo Takeno

Kineo Takeno 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: 20220291607
    Abstract: A developing device including: a developer; and a developing member configured to carry the developer on a surface thereof, the developing roller including an electro-conductive substrate and a single-layer elastic layer serving as a surface layer on the substrate, the surface layer comprising a binder resin, and the binder resin contains a crosslinked urethane resin and a crosslinked acrylic resin, the crosslinked urethane resin and the crosslinked acrylic resin form an interpenetrating polymer network structure in a first region from an outer surface of the surface layer to a position at a depth of 0.1 ?m from the outer surface, wherein the developer contains developer particles each containing at least a binder resin and a magnetic substance.
    Type: Application
    Filed: March 4, 2022
    Publication date: September 15, 2022
    Inventors: Takashi Koyanagi, Kineo Takeno, Takuho Sato
  • Patent number: 11256191
    Abstract: Provided is a developer carrying member that can stably form a high-quality electrophotographic image. The developer carrying member includes an electroconductive support and a surface layer in the stated order, wherein the surface layer contains a binder resin and electroconductive particles, and a content of the electroconductive particles in a region from a surface of the surface layer opposite to an outer surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and wherein the surface layer has a volume resistivity of 1.0×10?2 ?·cm or more and 1.0×102?·cm or less.
    Type: Grant
    Filed: August 26, 2021
    Date of Patent: February 22, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kineo Takeno, Kazuhito Wakabayashi, Atsushi Noguchi
  • Publication number: 20210389691
    Abstract: Provided is a developer carrying member that can stably form a high-quality electrophotographic image. The developer carrying member includes an electroconductive support and a surface layer in the stated order, wherein the surface layer contains a binder resin and electroconductive particles, and a content of the electroconductive particles in a region from a surface of the surface layer opposite to an outer surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and wherein the surface layer has a volume resistivity of 1.0×10?2 ?·cm or more and 1.0×102 ?·cm or less.
    Type: Application
    Filed: August 26, 2021
    Publication date: December 16, 2021
    Inventors: Kineo Takeno, Kazuhito Wakabayashi, Atsushi Noguchi
  • Patent number: 10459356
    Abstract: A charging member is provided that has high charging ability and can prevent generation of abnormal discharge even under an environment at a low temperature and a low humidity. The charging member includes an electroconductive support, an electroconductive elastic layer and a surface layer. The electroconductive elastic layer contains electrically insulating domains such that at least a part of the electrically insulating domains is exposed on the surface of the electroconductive elastic layer. The surface layer contains a polymetalloxane having a structure represented by Structural Formula (a1), and M1 in Structural Formula (a1) and a carbon atom in a structural unit represented by Structural Formula (a2) are bonded through a linking group represented by Structural Formula (a3).
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: October 29, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kineo Takeno, Noriyuki Doi
  • Patent number: 10365576
    Abstract: There is provided a charging member exhibiting stable charging performance even after the use for a long period of time. The charging member includes a support and a surface layer on the support, the surface layer includes polymetalloxane containing at least one metal atom selected from the group consisting of aluminum, zirconium, titanium, and tantalum, and a group represented by the following formula (1) or (2) is bonded to at least the one metal atom in the polymetalloxane, wherein X represents an atomic group required for forming a ring, A1 and A2 each independently represent a hydrogen atom or an alkyl group, and a symbol “*” represents a binding site with a metal atom in the polymetalloxane.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyuki Doi, Kineo Takeno, Yusuke Yagisawa
  • Patent number: 10078286
    Abstract: A charging member which has high charging ability and prevents generation of abnormal discharge is provided. The charging member includes a support and a surface layer. The surface layer contains a polymetalloxane having a specific structure.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: September 18, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kineo Takeno, Hiroshi Mayuzumi, Masataka Kodama, Noriyuki Doi, Kenichi Yamauchi, Noriko Suzumura, Hiroki Masu
  • Patent number: 10036971
    Abstract: Provided is a charging member that suppresses the occurrence of abnormal discharge under low temperature and low humidity. The charging member includes a support and a surface layer on the support, and the surface layer contains a compound represented by the following formula (a), (b), (c), or (d).
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: July 31, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyuki Doi, Kineo Takeno, Noriko Suzumura, Hiroshi Mayuzumi, Masataka Kodama, Kenichi Yamauchi, Hiroki Masu
  • Publication number: 20180173129
    Abstract: There is provided a charging member exhibiting stable charging performance even after the use for a long period of time. The charging member includes a support and a surface layer on the support, the surface layer includes polymetalloxane containing at least one metal atom selected from the group consisting of aluminum, zirconium, titanium, and tantalum, and a group represented by the following formula (1) or (2) is bonded to at least the one metal atom in the polymetalloxane, wherein X represents an atomic group required for forming a ring, A1 and A2 each independently represent a hydrogen atom or an alkyl group, and a symbol “*” represents a binding site with a metal atom in the polymetalloxane.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 21, 2018
    Inventors: Noriyuki Doi, Kineo Takeno, Yusuke Yagisawa
  • Patent number: 9989879
    Abstract: A charging member is provided which can prevent electrostatic adhesion of a toner and/or an external additive of the toner to the surface of the charging member, and exhibits stable charging performance during long-term use. The charging member comprises a support, and a surface layer on the support, and the surface layer comprises a polymetalloxane containing at least one metal atom selected from the group consisting of aluminum, titanium, zirconium and tantalum, and a specific group which is bonded to the at least one metal atom in the polymetalloxane.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: June 5, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyuki Doi, Masataka Kodama, Kineo Takeno
  • Publication number: 20180101106
    Abstract: A charging member is provided that has high charging ability and can prevent generation of abnormal discharge even under an environment at a low temperature and a low humidity. The charging member includes an electroconductive support, an electroconductive elastic layer and a surface layer. The electroconductive elastic layer contains electrically insulating domains such that at least a part of the electrically insulating domains is exposed on the surface of the electroconductive elastic layer. The surface layer contains a polymetalloxane having a structure represented by Structural Formula (a1), and M1 in Structural Formula (a1) and a carbon atom in a structural unit represented by Structural Formula (a2) are bonded through a linking group represented by Structural Formula (a3).
    Type: Application
    Filed: September 27, 2017
    Publication date: April 12, 2018
    Inventors: Kineo Takeno, Noriyuki Doi
  • Patent number: 9921513
    Abstract: A charging member capable of inhibiting the effect of the contact mark on the electrophotographic image, even after in contact with another member for a long term, is provided. The charging member has a surface layer on a support, the surface layer containing a polymer compound having a structural unit represented by the following formula (1): In the formula (1), A represents an aromatic cyclic hydrocarbon group; R1 represents a specific hydrocarbon group. L represents a polysiloxane having at least one of an SiO3/2 unit (T) and an SiO2/2 unit (D). U represents an integer of 1 or more.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroki Masu, Noriyuki Doi, Kineo Takeno
  • Patent number: 9885971
    Abstract: There is provided a charging member capable of preventing the occurrence of abnormal discharge at low temperature and low humidity, and capable of preventing the occurrence of an image defect due to abrasion. The charging member includes a support and a surface layer on the support, and the surface layer contains a specific compound.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: February 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kineo Takeno, Noriyuki Doi, Masataka Kodama
  • Publication number: 20160378010
    Abstract: A charging member is provided which can prevent electrostatic adhesion of a toner and/or an external additive of the toner to the surface of the charging member, and exhibits stable charging performance during long-term use. The charging member comprises a support, and a surface layer on the support, and the surface layer comprises a polymetalloxane containing at least one metal atom selected from the group consisting of aluminum, titanium, zirconium and tantalum, and a specific group which is bonded to the at least one metal atom in the polymetalloxane.
    Type: Application
    Filed: June 20, 2016
    Publication date: December 29, 2016
    Inventors: Noriyuki Doi, Masataka Kodama, Kineo Takeno
  • Publication number: 20160378011
    Abstract: There is provided a charging member capable of preventing the occurrence of abnormal discharge at low temperature and low humidity, and capable of preventing the occurrence of an image defect due to abrasion. The charging member includes a support and a surface layer on the support, and the surface layer contains a specific compound.
    Type: Application
    Filed: June 22, 2016
    Publication date: December 29, 2016
    Inventors: Kineo Takeno, Noriyuki Doi, Masataka Kodama
  • Publication number: 20160299450
    Abstract: A charging member which has high charging ability and prevents generation of abnormal discharge is provided. The charging member includes a support and a surface layer. The surface layer contains a polymetalloxane having a specific structure.
    Type: Application
    Filed: April 5, 2016
    Publication date: October 13, 2016
    Inventors: Kineo Takeno, Hiroshi Mayuzumi, Masataka Kodama, Noriyuki Doi, Kenichi Yamauchi, Noriko Suzumura, Hiroki Masu
  • Publication number: 20160299451
    Abstract: Provided is a charging member exhibiting a stable charging performance even by long-term use. The charging member includes a support and a surface layer on the support, and the surface layer contains a magnesium oxide particle, and a compound having a specified structure.
    Type: Application
    Filed: April 6, 2016
    Publication date: October 13, 2016
    Inventors: Masataka Kodama, Noriyuki Doi, Kineo Takeno, Noriko Suzumura, Hiroki Masu
  • Publication number: 20160161877
    Abstract: A charging member capable of inhibiting the effect of the contact mark on the electrophotographic image, even after in contact with another member for a long term, is provided. The charging member has a surface layer on a support, the surface layer containing a polymer compound having a structural unit represented by the following formula (1): In the formula (1), A represents an aromatic cyclic hydrocarbon group; R1 represents a specific hydrocarbon group. L represents a polysiloxane having at least one of an SiO3/2 unit (T) and an SiO2/2 unit (D). U represents an integer of 1 or more.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 9, 2016
    Inventors: Hiroki Masu, Noriyuki Doi, Kineo Takeno
  • Publication number: 20150331348
    Abstract: Provided is a charging member that suppresses the occurrence of abnormal discharge under low temperature and low humidity. The charging member includes a support and a surface layer on the support, and the surface layer contains a compound represented by the following formula (a), (b), (c), or (d).
    Type: Application
    Filed: May 26, 2015
    Publication date: November 19, 2015
    Inventors: Noriyuki Doi, Kineo Takeno, Noriko Suzumura, Hiroshi Mayuzumi, Masataka Kodama, Kenichi Yamauchi, Hiroki Masu