Patents by Inventor Takanori Ueno

Takanori Ueno 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: 10935898
    Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer, a photosensitive layer, and a surface layer, the undercoat layer containing a binder resin and strontium titanate particles, the surface layer being a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: March 2, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ikuyo Kuroiwa, Kumiko Takizawa, Tsuyoshi Shimada, Kan Tanabe, Haruhiko Mitsuda, Takanori Ueno, Tatsuya Ikezue, Wataru Kitamura
  • Patent number: 10921723
    Abstract: Provided is an electrophotographic photosensitive member that can achieve both of abrasion resistance and the suppression of a ghost. The electrophotographic photosensitive member includes: a support; an undercoat layer; a charge-generating layer; and a charge-transporting layer, the undercoat layer, the charge-generating layer, and the charge-transporting layer being arranged in the stated order on the support, wherein the charge-transporting layer includes a charge-transporting substance, and a polymer containing a structure represented by the following general formula (1) and a structure represented by the following general formula (2), wherein the charge-generating layer includes a phthalocyanine crystal and a binder resin, and wherein the undercoat layer includes strontium titanate particles and a binder resin.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: February 16, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kumiko Takizawa, Tsuyoshi Shimada, Takanori Ueno, Ikuyo Kuroiwa, Haruhiko Mitsuda, Kan Tanabe, Tatsuya Ikezue
  • Patent number: 10908521
    Abstract: An electrophotographic photoconductor includes, in sequence, a support member; an undercoating layer containing a binder resin and an inorganic particle; and a photosensitive layer, wherein the binder resin of the undercoating layer is an alkyd-melamine resin, and the inorganic particle of the undercoating layer contains a strontium titanate particle.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: February 2, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruhiko Mitsuda, Tatsuya Ikezue, Kumiko Takizawa, Kan Tanabe, Ikuyo Kuroiwa, Takanori Ueno, Tsuyoshi Shimada
  • Patent number: 10838314
    Abstract: The electrophotographic photosensitive member includes an undercoat layer and a surface layer on or above a support in this order, in which the undercoat layer contains metal oxide particles and a specific binder resin, the surface layer contains a charge transporting substance, fluororesin particles, and a specific binder resin, an arithmetic average roughness Ra of a surface of the undercoat layer is 0.15 ?m or less, a refractive index (a) of the metal oxide particles and a refractive index (b) of the binder resin contained in the undercoat layer satisfy a specific relationship, and a refractive index (c) of the binder resin contained in the surface layer and a refractive index (d) of the fluororesin particles satisfy a specific relationship.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: November 17, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tatsuya Ikezue, Kumiko Takizawa, Ikuyo Kuroiwa, Kan Tanabe, Tsuyoshi Shimada, Haruhiko Mitsuda, Takanori Ueno
  • Patent number: 10705440
    Abstract: Provided is an electrophotographic photosensitive member that can suppress the generation of both an interference fringe and a streaky uneven part in a circumferential direction on an image. The generation of the interference fringe and the generation of the streaky uneven part in the circumferential direction on the image are suppressed by defining a length of a line-shaped groove of a support in a circumferential direction, and defining roughness parameters of a support in an axial direction.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: July 7, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takanori Ueno, Kumiko Takizawa, Ikuyo Kuroiwa, Tsuyoshi Shimada, Wataru Kitamura, Eileen Takeuchi
  • Patent number: 10642175
    Abstract: The present invention provides an electrophotographic photosensitive member which has a substrate, a photoconductive layer and a surface layer formed from hydrogenated amorphous silicon carbide in this order. The average value of the carbon content (C/(C+Si)) of the surface layer formed from the hydrogenated amorphous silicon carbide is set at 0.90 or more and less than 1.00, and the average value of the hydrogen content (H/(H+C+Si)) is set at 0.40 or less; and when the average value of the ratios of the sum of a Si—O bond and an O—Si—O bond in the outermost surface region that constitutes a range within a depth of 5 nm or less from the outermost surface of the surface layer is represented by a, and an average value of the silicon content (Si/(C+Si)) is represented by b, 0.015?a*b?0.090 holds.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 5, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jun Ohira, Hironori Owaki, Yukihiro Abe, Yasuo Kojima, Kazunari Ooyama, Takanori Ueno
  • Publication number: 20200133150
    Abstract: An electrophotographic photoconductor includes, in sequence, a support member; an undercoating layer containing a binder resin and an inorganic particle; and a photosensitive layer, wherein the binder resin of the undercoating layer is an alkyd-melamine resin, and the inorganic particle of the undercoating layer contains a strontium titanate particle.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 30, 2020
    Inventors: Haruhiko Mitsuda, Tatsuya Ikezue, Kumiko Takizawa, Kan Tanabe, Ikuyo Kuroiwa, Takanori Ueno, Tsuyoshi Shimada
  • Publication number: 20200133145
    Abstract: An electrophotographic photoconductor includes, in sequence, a support, an undercoat layer, a charge generation layer containing a charge generation material and a first binder resin, and a charge transport layer containing a charge transport material and a second binder resin. The charge generation material in the charge generation layer is chlorogallium phthalocyanine having diffraction peaks at Bragg angles (2?±0.2°) of 7.4°, 16.6°, 25.5°, and 28.3° in an X-ray diffraction pattern obtained by using Cu K-? radiation. The undercoat layer contains strontium titanate particles and a third binder resin.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 30, 2020
    Inventors: Kan Tanabe, Tatsuya Ikezue, Kumiko Takizawa, Haruhiko Mitsuda, Ikuyo Kuroiwa, Takanori Ueno, Tsuyoshi Shimada
  • Publication number: 20200133149
    Abstract: The present disclosure provides an electrophotographic photosensitive member that can suppress a black spot and an exposure memory. The electrophotographic photosensitive member has a support, an undercoat layer and a photosensitive layer having a mono-layer structure in this order, wherein the undercoat layer contains a binder resin and strontium titanate particles; and the photosensitive layer having a mono-layer structure contains a binder resin, a charge generation material, a hole transport material and an electron transport material.
    Type: Application
    Filed: October 21, 2019
    Publication date: April 30, 2020
    Inventors: Takanori Ueno, Kumiko Takizawa, Kan Tanabe, Haruhiko Mitsuda, Ikuyo Kuroiwa, Tsuyoshi Shimada, Wataru Kitamura, Shinji Takagi, Tatsuya Ikezue
  • Publication number: 20200133147
    Abstract: Provided is an electrophotographic photosensitive member that can achieve both of abrasion resistance and the suppression of a ghost. The electrophotographic photosensitive member includes: a support; an undercoat layer; a charge-generating layer; and a charge-transporting layer, the undercoat layer, the charge-generating layer, and the charge-transporting layer being arranged in the stated order on the support, wherein the charge-transporting layer includes a charge-transporting substance, and a polymer containing a structure represented by the following general formula (1) and a structure represented by the following general formula (2), wherein the charge-generating layer includes a phthalocyanine crystal and a binder resin, and wherein the undercoat layer includes strontium titanate particles and a binder resin.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 30, 2020
    Inventors: Kumiko Takizawa, Tsuyoshi Shimada, Takanori Ueno, Ikuyo Kuroiwa, Haruhiko Mitsuda, Kan Tanabe, Tatsuya Ikezue
  • Publication number: 20200133146
    Abstract: Provided are an electrophotographic photosensitive member excellent in suppression of the occurrence of a photomemory, and a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member. The electrophotographic photosensitive member includes in this order: an electroconductive support; an undercoat layer; and a photosensitive layer, wherein the undercoat layer contains strontium titanate particles and a binder resin, and the photosensitive layer contains a butanediol adduct of titanyl phthalocyanine.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 30, 2020
    Inventors: Tsuyoshi Shimada, Kumiko Takizawa, Ikuyo Kuroiwa, Kan Tanabe, Haruhiko Mitsuda, Tatsuya Ikezue, Takanori Ueno
  • Publication number: 20200133148
    Abstract: The electrophotographic photosensitive member includes an undercoat layer and a surface layer on or above a support in this order, in which the undercoat layer contains metal oxide particles and a specific binder resin, the surface layer contains a charge transporting substance, fluororesin particles, and a specific binder resin, an arithmetic average roughness Ra of a surface of the undercoat layer is 0.15 ?m or less, a refractive index (a) of the metal oxide particles and a refractive index (b) of the binder resin contained in the undercoat layer satisfy a specific relationship, and a refractive index (c) of the binder resin contained in the surface layer and a refractive index (d) of the fluororesin particles satisfy a specific relationship.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 30, 2020
    Inventors: Tatsuya Ikezue, Kumiko Takizawa, Ikuyo Kuroiwa, Kan Tanabe, Tsuyoshi Shimada, Haruhiko Mitsuda, Takanori Ueno
  • Publication number: 20200124996
    Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer, a photosensitive layer, and a surface layer, the undercoat layer containing a binder resin and strontium titanate particles, the surface layer being a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.
    Type: Application
    Filed: October 17, 2019
    Publication date: April 23, 2020
    Inventors: Ikuyo Kuroiwa, Kumiko Takizawa, Tsuyoshi Shimada, Kan Tanabe, Haruhiko Mitsuda, Takanori Ueno, Tatsuya Ikezue, Wataru Kitamura
  • Publication number: 20200019093
    Abstract: An intermediary transfer belt having surface resistivity ?s of 1×109 ?/square or more and volume resistivity ?v of 1×1012 ?·cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.
    Type: Application
    Filed: July 10, 2019
    Publication date: January 16, 2020
    Inventors: Ryosuke Tsuruga, Toshiyuki Yoshida, Jun Ohira, Akeshi Asaka, Hiroto Sugimoto, Takanori Ueno, Koji Sato, Midai Suzuki, Atsushi Hori, Kaoru Okamoto, Megumi Uchino, Kazuhisa Shirayama, Naoto Kameyama, Kiyonori Soutome, Shigeo Kuroda, Akira Okano, Hiroshi Tominaga
  • Publication number: 20190369513
    Abstract: Provided is an electrophotographic photosensitive member that can suppress the generation of both an interference fringe and a streaky uneven part in a circumferential direction on an image. The generation of the interference fringe and the generation of the streaky uneven part in the circumferential direction on the image are suppressed by defining a length of a line-shaped groove of a support in a circumferential direction, and defining roughness parameters of a support in an axial direction.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Inventors: Takanori Ueno, Kumiko Takizawa, Ikuyo Kuroiwa, Tsuyoshi Shimada, Wataru Kitamura, Eileen Takeuchi
  • Patent number: 10338486
    Abstract: An average value of a hydrogen content ratio of a surface layer made of hydrogenated amorphous carbon is set to be 0.40 or less and a maximum value of an sp2 bonding ratio in an outermost surface region of the surface layer made of the hydrogenated amorphous carbon is set to be 0.50 or less.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: July 2, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yukihiro Abe, Jun Ohira, Kazunari Ooyama, Takanori Ueno, Hironori Owaki, Yasuo Kojima
  • Publication number: 20190072866
    Abstract: An average value of a hydrogen content ratio of a surface layer made of hydrogenated amorphous carbon is set to be 0.40 or less and a maximum value of an sp2 bonding ratio in an outermost surface region of the surface layer made of the hydrogenated amorphous carbon is set to be 0.50 or less.
    Type: Application
    Filed: September 4, 2018
    Publication date: March 7, 2019
    Inventors: Yukihiro Abe, Jun Ohira, Kazunari Ooyama, Takanori Ueno, Hironori Owaki, Yasuo Kojima
  • Publication number: 20190072865
    Abstract: The present invention provides an electrophotographic photosensitive member which has a substrate, a photoconductive layer and a surface layer formed from hydrogenated amorphous silicon carbide in this order. The average value of the carbon content (C/(C+Si)) of the surface layer formed from the hydrogenated amorphous silicon carbide is set at 0.90 or more and less than 1.00, and the average value of the hydrogen content (H/(H+C+Si)) is set at 0.40 or less; and when the average value of the ratios of the sum of a Si—O bond and an O—Si—O bond in the outermost surface region that constitutes a range within a depth of 5 nm or less from the outermost surface of the surface layer is represented by a, and an average value of the silicon content (Si/(C+Si)) is represented by b, 0.015?a*b?0.090 holds.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 7, 2019
    Inventors: Jun Ohira, Hironori Owaki, Yukihiro Abe, Yasuo Kojima, Kazunari Ooyama, Takanori Ueno
  • Publication number: 20180277355
    Abstract: There is provided a technique that includes a process chamber in which a process is performed to a substrate, the process including forming a film containing a main element, a first nozzle configured to supply a precursor containing the main element to the substrate in the process chamber, and a second nozzle configured to supply a reactant to the substrate in the process chamber. The first nozzle includes a first ceiling hole provided at a ceiling portion of the first nozzle and opened in a vertical direction, and a plurality of first side holes provided at a side portion of the first nozzle and opened in a horizontal direction. An opening area of the first ceiling hole is larger than an opening area of each of the plurality of first side holes.
    Type: Application
    Filed: March 14, 2018
    Publication date: September 27, 2018
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Kosuke TAKAGI, Risa YAMAKOSHI, Takanori UENO
  • Publication number: 20140349226
    Abstract: Provided is an electrophotographic photosensitive member that improves the sensitivity characteristic and high-humidity deletion resistance, and achieves compatibility between a high image-resolving power and the suppression of an image memory. The electrophotographic photosensitive member comprises an electrophotographic photosensitive member, including: a photoconductive layer; and a surface layer comprising hydrogenated amorphous silicon carbide on the photoconductive layer, in which: a ratio (C/(Si+C)) of a number of carbon atoms (C) to a sum of a number of silicon atoms (Si) and the number of the carbon atoms (C) in the surface layer is 0.50 or more and 0.65 or less; a sum of an atom density of the silicon atoms and an atom density of the carbon atoms in the surface layer is 6.60×1022 atoms/cm3 or more; and a defect density of the surface layer determined by electron spin resonance measurement is 9.0×1018 spins/cm3 or more and 2.2×1019 spins/cm3 or less.
    Type: Application
    Filed: May 27, 2014
    Publication date: November 27, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yukihiro Abe, Takanori Ueno, Hironori Owaki, Tomohito Ozawa, Jun Ohira, Masaki Mizutani