Patents by Inventor Kenta Yamakoshi

Kenta Yamakoshi 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: 20250053110
    Abstract: A charging system includes a charging member that rotates while following a rotating image holding body and that charges the image holding body, a removing member that rotates while following the rotating charging member in a state of being arranged at a contact position in contact with the charging member and that removes an adhered deposit adhered to the charging member, a moving member that moves the removing member to a separation position separated from the charging member and the contact position, and at least one processor, in which the processor is configured to cause the removing member to remove the adhered deposit adhered to the charging member only for a removal time by controlling the moving member to move the removing member arranged at the separation position to the contact position at a time determined in advance.
    Type: Application
    Filed: February 18, 2024
    Publication date: February 13, 2025
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yuki TAGAWA, Yoshiyuki HAYASHI, Yukimi KAWABATA, Kenta YAMAKOSHI
  • Patent number: 12105438
    Abstract: A conductive member includes: a substrate; an elastic layer provided on the substrate; and a surface layer provided on the elastic layer, in which the surface layer contains a conductive agent and has a sea/island structure that includes a sea portion containing a first resin and an island portion containing a second resin, and an average length of connected island portions in observation of a cross-section of the surface layer is 2.0 ?m or more and 4.5 ?m or less.
    Type: Grant
    Filed: August 25, 2023
    Date of Patent: October 1, 2024
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Toshiyasu Yukawa, Kenta Yamakoshi, Yukimi Kawabata
  • Publication number: 20240319622
    Abstract: A conductive member includes: a substrate; an elastic layer provided on the substrate; and a surface layer provided on the elastic layer, in which the surface layer contains a conductive agent and has a sea/island structure that includes a sea portion containing a first resin and an island portion containing a second resin, and in observation of a cross-section of the surface layer, an area ratio A of island portions in a region A from a surface of the surface layer to a depth that is 20% of a film thickness is 25% or more and 45% or less.
    Type: Application
    Filed: August 29, 2023
    Publication date: September 26, 2024
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Kenta YAMAKOSHI, Yukimi KAWABATA
  • Publication number: 20240319632
    Abstract: A conductive member includes: a substrate; an elastic layer provided on the substrate; and a surface layer provided on the elastic layer, in which the surface layer contains a conductive agent and has a sea/island structure that includes a sea portion containing a first resin and an island portion containing a second resin, and an average length of connected island portions in observation of a cross-section of the surface layer is 2.0 ?m or more and 4.5 ?m or less.
    Type: Application
    Filed: August 25, 2023
    Publication date: September 26, 2024
    Applicant: FUJIFILM BUSINESS INNOVATION CORP.
    Inventors: Toshiyasu YUKAWA, Kenta YAMAKOSHI, Yukimi KAWABATA
  • Publication number: 20240302759
    Abstract: A process cartridge includes an electrophotographic photoreceptor that includes a photosensitive layer and a protective layer on a conductive substrate in this order, and a charging member that includes an elastic layer and a surface layer on a conductive base material in this order and comes into contact with the electrophotographic photoreceptor to charge a surface of the electrophotographic photoreceptor, in which the protective layer in the electrophotographic photoreceptor is a cured film formed to contain a crosslinked material of a composition containing at least one compound X selected from the group consisting of a compound having a guanamine structure and a compound having a melamine structure and a charge transport material Y containing at least one group selected from the group consisting of —OH, —OCH3, —NH2, —SH, and —COOH, a water contact angle ?1 of the surface of the electrophotographic photoreceptor is 65° or greater and less than 80°, and a water contact angle ?2 of a surface of the charging
    Type: Application
    Filed: February 4, 2024
    Publication date: September 12, 2024
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yukimi KAWABATA, Kenta YAMAKOSHI, Takuya YAMAMOTO
  • Patent number: 12055868
    Abstract: A conductive member includes: a substrate; an elastic layer provided on the substrate; and a surface layer provided on the elastic layer, in which the surface layer contains a conductive agent and has a sea/island structure that consists of a sea portion containing a first resin and an island portion containing a second resin, and a distance R between the island portions and a radius r of the island portion in a cross-section of the surface layer satisfy the following Expression (1-1), ?0.20?R?2r?0.40??Expression (1-1).
    Type: Grant
    Filed: March 24, 2023
    Date of Patent: August 6, 2024
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Kenta Yamakoshi, Yukimi Kawabata
  • Patent number: 12055874
    Abstract: An endless belt contains: a resin; electrically conductive carbon particles; and a surfactant. When polyester resin particles having a volume average particle diameter of 4.7 ?m are caused to adhere to an outer circumferential surface of the endless belt and then air is blown onto the outer circumferential surface from an upper side of the outer circumferential surface while the blowing pressure of the air is increased, all the polyester resin particles adhering to the outer circumferential surface are separated from the outer circumferential surface before or when the blowing pressure reaches 6 kPa.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: August 6, 2024
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Masato Ono, Masayuki Seko, Koichi Matsumoto, Shigeru Fukuda, Satoya Sugiura, Daisuke Tanemura, Masato Furukawa, Hiroaki Tanaka, Kenta Yamakoshi, Yosuke Kubo
  • Publication number: 20240103393
    Abstract: A conductive member includes: a substrate; an elastic layer provided on the substrate; and a surface layer provided on the elastic layer, in which the surface layer contains a conductive agent and has a sea/island structure that consists of a sea portion containing a first resin and an island portion containing a second resin, and a distance R between the island portions and a radius r of the island portion in a cross-section of the surface layer satisfy the following Expression (1-1), ?0.20?R?2r?0.40.
    Type: Application
    Filed: March 24, 2023
    Publication date: March 28, 2024
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Kenta YAMAKOSHI, Yukimi KAWABATA
  • Publication number: 20240077808
    Abstract: A contact charging type image forming apparatus, to which only a direct current voltage is applied, includes an electrophotographic photoreceptor that includes a conductive base material A and a photosensitive layer provided on the conductive base material A, and a charging member that includes a conductive base material B and an elastic layer provided on the conductive base material B, in which in a case where a dielectric film thickness of the electrophotographic photoreceptor is defined as L, and a resistance component of an impedance of the charging member in a range of 1 Hz or greater and 500 Hz or less, which is measured by an alternating current impedance method, is defined as R, Expression (1) is satisfied. L<?0.75×loge(R)+15.
    Type: Application
    Filed: May 3, 2023
    Publication date: March 7, 2024
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yukimi KAWABATA, Kenta YAMAKOSHI, Hiroyuki MIURA
  • Patent number: 11874617
    Abstract: An endless belt includes a resin, and particles having an average primary particle diameter of 8 nm or more and 20 nm or less. In a volume frequency distribution of the particles determined by small-angle X-ray scattering measurement, the ratio (area B/area A) of graph area B of a particle diameter region of over 35 nm to graph area A of a particle diameter region of 35 nm or less is 0.3 or less.
    Type: Grant
    Filed: September 22, 2022
    Date of Patent: January 16, 2024
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Yosuke Kubo, Hiroaki Tanaka, Shigeru Fukuda, Kenta Yamakoshi, Masato Ono, Masato Furukawa, Daisuke Tanemura, Masayuki Seko, Koichi Matsumoto, Iori Nishimura
  • Patent number: 11796933
    Abstract: A conductive member includes a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer. The surface layer contains a conductive agent and has a sea-island structure including a sea containing a first resin and islands containing a second resin. The area occupancy of the islands in a cross section of the surface layer is 10% or more and 50% or less.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: October 24, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Kenta Yamakoshi, Yukimi Kawabata, Fuyuki Kano
  • Patent number: 11782355
    Abstract: A charging member of a contact charging system that applies only a direct-current voltage to the charging member includes a conductive substrate, an elastic layer disposed on the conductive substrate, and a surface layer disposed on the elastic layer. When measured by an alternating-current impedance method within a range of 1 MHz to 1 mHz in an environment at a temperature of 28° C. and a humidity of 85%, a resistance component R of an impedance within a range of 1 Hz to 100 Hz is 4.0×104 ? or more and 1.0×106 ? or less and an impedance Z within a range of 1 Hz to 100 Hz is over 3.6×104 ? and 3.5×105 ? or less.
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: October 10, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Yukimi Kawabata, Fuyuki Kano, Kenta Yamakoshi
  • Publication number: 20230297008
    Abstract: An endless belt includes a resin, and particles having an average primary particle diameter of 8 nm or more and 20 nm or less. In a volume frequency distribution of the particles determined by small-angle X-ray scattering measurement, the ratio (area B/area A) of graph area B of a particle diameter region of over 35 nm to graph area A of a particle diameter region of 35 nm or less is 0.3 or less.
    Type: Application
    Filed: September 22, 2022
    Publication date: September 21, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yosuke KUBO, Hiroaki Tanaka, Shigeru Fukuda, Kenta Yamakoshi, Masato Ono, Masato Furukawa, Daisuke Tanemura, Masayuki Seko, Koichi Matsumoto, Iori Nishimura
  • Publication number: 20230288833
    Abstract: A conductive member includes a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer. The surface layer contains a conductive agent and has a sea-island structure including a sea containing a first resin and islands containing a second resin. The area occupancy of the islands in a cross section of the surface layer is 10% or more and 50% or less.
    Type: Application
    Filed: September 8, 2022
    Publication date: September 14, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Kenta YAMAKOSHI, Yukimi KAWABATA, Fuyuki KANO
  • Publication number: 20230229097
    Abstract: A charging member of a contact charging system that applies only a direct-current voltage to the charging member includes a conductive substrate, an elastic layer disposed on the conductive substrate, and a surface layer disposed on the elastic layer. When measured by an alternating-current impedance method within a range of 1 MHz to 1 mHz in an environment at a temperature of 28° C. and a humidity of 85%, a resistance component R of an impedance within a range of 1 Hz to 100 Hz is 4.0×104? or more and 1.0×106? or less and an impedance Z within a range of 1 Hz to 100 Hz is over 3.6×104? and 3.5×105? or less.
    Type: Application
    Filed: September 6, 2022
    Publication date: July 20, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yukimi KAWABATA, Fuyuki KANO, Kenta YAMAKOSHI
  • Patent number: 11644770
    Abstract: An intermediate transfer body includes a base layer and a surface layer disposed on the base layer, in which surface layer includes a sea-island structure that includes a sea phase and an island phase, in which the sea phase includes a resin, the island phase including an organopolysiloxane.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: May 9, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Hiroaki Tanaka, Shigeru Fukuda, Kenta Yamakoshi, Yosuke Kubo, Masayuki Seko
  • Publication number: 20220373939
    Abstract: An intermediate transfer body includes a base layer and a surface layer disposed on the base layer, in which surface layer includes a sea-island structure that includes a sea phase and an island phase, in which the sea phase includes a resin, the island phase including an organopolysiloxane.
    Type: Application
    Filed: September 7, 2021
    Publication date: November 24, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Hiroaki TANAKA, Shigeru FUKUDA, Kenta YAMAKOSHI, Yosuke KUBO, Masayuki SEKO
  • Patent number: 11359041
    Abstract: An endless belt includes a substrate layer, and a first surface layer that is disposed on an outer circumferential surface of the substrate layer and that includes a cross-linked fluororesin layer. A layer containing a cross-linked fluororesin forms the inner circumferential surface of the belt. Martens hardness of the inner circumferential surface of the belt at 130° C. is higher than Martens hardness of the outer circumferential surface of the belt at 130° C.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: June 14, 2022
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Hideaki Ohara, Kenji Omori, Junko Yamasaki, Kenta Yamakoshi
  • Patent number: 11334006
    Abstract: An endless belt includes: a resin; and electrically conductive particles, wherein an integrated discharge amount is 350 ?C or less. The integrated discharge amount is determined by disposing an electrode at a position spaced 60 ?m apart from the outer circumferential surface of the belt, applying a voltage to the electrode, and measuring the amount of discharge for a period of 1 second after the voltage reaches 1300 V.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: May 17, 2022
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Daisuke Tanemura, Shigeru Fukuda, Satoya Sugiura, Tomotake Inagaki, Masato Ono, Masato Furukawa, Hiroaki Tanaka, Kenta Yamakoshi, Ryohei Yoshikawa, Yosuke Kubo, Masayuki Seko, Koichi Matsumoto
  • Publication number: 20220146965
    Abstract: An endless belt includes: a resin; and electrically conductive particles, wherein an integrated discharge amount is 350 ?C or less. The integrated discharge amount is determined by disposing an electrode at a position spaced 60 ?m apart from the outer circumferential surface of the belt, applying a voltage to the electrode, and measuring the amount of discharge for a period of 1 second after the voltage reaches 1300 V.
    Type: Application
    Filed: May 5, 2021
    Publication date: May 12, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Daisuke TANEMURA, Shigeru FUKUDA, Satoya SUGIURA, Tomotake INAGAKI, Masato ONO, Masato FURUKAWA, Hiroaki TANAKA, Kenta YAMAKOSHI, Ryohei YOSHIKAWA, Yosuke KUBO, Masayuki SEKO, Koichi MATSUMOTO