Patents by Inventor Tatsuya Kubo

Tatsuya Kubo 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: 20220121138
    Abstract: A filter includes a sticker and a filter body. The filter body has a smaller weight density per unit volume at a first side than at a second side opposite the first side. The sticker is disposed around a surface of the second side of the filter body.
    Type: Application
    Filed: October 11, 2021
    Publication date: April 21, 2022
    Inventors: Tatsumi YAMADA, Takuya SUGANUMA, Takuya SEKINE, Shotaro HOSHI, Kazuki YOGOSAWA, Yuta YABUTA, Tatsuya KUBO, Hotaru HASHIKAWA
  • Publication number: 20220107605
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device. The filter includes a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a lower weight density per unit volume at the first side than at the second side. At least a side face of the first side of the filter is covered with an air-impermeable member. The side face is a lateral face of the filter at the first side.
    Type: Application
    Filed: October 6, 2021
    Publication date: April 7, 2022
    Inventors: Hotaru HASHIKAWA, Tatsuya KUBO, Kazuki YOGOSAWA, Yuta YABUTA, Takuya SUGANUMA
  • Publication number: 20220072862
    Abstract: A process cartridge includes an image bearer, a developer bearer, and a positioning member. The image bearer is rotatable. The developer bearer is rotatable and opposite to the image bearer. The positioning member determines an opposing distance between the image bearer and the developer bearer, and includes a fitting portion and a groove. A fitted portion of the image bearer rotatably fits to the fitting portion. The groove extends from a ceiling portion to a bottom portion. A shaft portion of the developer bearer is slidingly movable in the groove. The groove is formed such that the shaft portion of the developer bearer contacts the bottom portion and is supported by the bottom portion. The ceiling portion of the groove is open upward so that the shaft portion of the developer bearer is insertable to and removable from the groove.
    Type: Application
    Filed: September 7, 2021
    Publication date: March 10, 2022
    Inventors: Tatsuya KUBO, Shinya KARASAWA, Kazuki YOGOSAWA, Yuuki TSUCHIYA
  • Patent number: 11215948
    Abstract: A powder collection device includes a collection container configured to store powder collected and a powder amount detector including a pair of electrodes. The powder amount detector detects an amount of powder in the collection container based on capacitance between the pair of electrodes.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: January 4, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shuntaroh Tamaki, Junichi Matsumoto, Tatsuya Kubo, Hiroaki Okamoto
  • Patent number: 11201326
    Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: December 14, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Akihiro Yamano, Masanori Morishita, Tetsuo Sakai, Hideya Yoshitake
  • Publication number: 20210367238
    Abstract: Provided is a sulfur-based active material for a non-aqueous electrolyte secondary battery having a large charge/discharge capacity and excellent cycle characteristics which is inexpensively and easily provided, an electrode comprising the sulfur-based active material, and a non-aqueous electrolyte secondary battery comprising the electrode, as well as a producing method thereof. The sulfur-based active material is obtainable by calcinating a raw material, the raw material comprising (1) a heat-expandable particle comprising an outer shell comprising an acryl-based copolymer and a hydrocarbon included inside the outer shell, the heat-expandable particle having an expansion starting temperature of 150° C. or lower, and (2) sulfur.
    Type: Application
    Filed: April 26, 2021
    Publication date: November 25, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20210328224
    Abstract: Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin is at least one polymer selected from the group consisting of (a) a polymer of at least one selected from the group consisting of acrylate compounds represented by CH2?C(R11) COOR12 (wherein, R11 is a hydrogen atom or a methyl group, and R12 is an alkyl group.) and (b) a polymer of at least one selected from the group consisting of acrylate compounds above and at least one selected from the group consisting of diacrylate compounds represented by CH2?C(R21)COO—Y—OCO (R22) C?CH2 (wherein, each of R21 and R22 is the same or different and is a methyl group, etc., Y is a hydrocarbylene group, etc., wherein the hydrocarbylene group may have a substituent selected from a hydroxyl group and an alkyl group.).
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya CHUJO, Tatsuya KUBO
  • Publication number: 20210324115
    Abstract: It is an object of the present invention to provide a novel organic sulfur material which is capable of improving a charge/discharge capacity and cycle characteristics, an electrode comprising the organic sulfur material, that is, a positive electrode or a negative electrode, and a lithium-ion secondary battery comprising the electrode. Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin has peaks around 756 cm?1, around 1066 cm?1, around 1150 cm?1, around 1245 cm?1, around 1270 cm?1, around 1453 cm?1, and around 1732 cm?1 in an FT-IR spectrum.
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya CHUJO, Tatsuya KUBO
  • Patent number: 11094939
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: August 17, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo
  • Patent number: 11069893
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: July 20, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo
  • Patent number: 11029623
    Abstract: A powder amount detector detects an amount of powder in a powder container of a cylindrical shape arranged horizontally. The powder amount detector includes a pair of measuring electrodes configured to detect capacitance between the pair of measuring electrodes to detect the amount of powder. The pair of measuring electrodes is disposed around the powder container. One of the pair of measuring electrodes has a flat shape, and the other of the pair of measuring electrodes has an arc shape following a shape of the powder container.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: June 8, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Kubo, Junichi Matsumoto, Shuntaroh Tamaki, Hiroaki Okamoto
  • Patent number: 10969708
    Abstract: A developing device includes a developing roller to rotate in a predetermined direction of rotation and opposed to or in contact with an image bearer to form a development range, a cover to cover the developing roller downstream from the development range in the predetermined direction of rotation, a sheet member cantilevered by the cover to contact the developing roller with a flat face of the sheet member while trailing along the predetermined direction of rotation at a position downstream from the development range. The cover includes a large gap portion to form a first gap in a first predetermined range in the predetermined direction of rotation and a small gap portion disposed adjacent to and downstream from the large gap portion in the predetermined direction of rotation to form a second gap smaller than the first gap in a second predetermined range in the predetermined direction of rotation.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: April 6, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuya Suganuma, Tatsuya Kubo
  • Publication number: 20210080864
    Abstract: A powder container includes a powder chamber for containing powder for forming images, a powder outlet formed in a face of the powder container, and a shutter assembly to open and close the powder outlet and including first and second shutters. The first shutter is movable between a sealing position to close the powder outlet and an open position to open the powder outlet and includes a pressed member to cancel retention of the first shutter at the sealing position. The second shutter includes a pressing projection that interferes with the pressed member of the first shutter and is movable between a shielding position to cover the pressed member without interference between the pressing projection and the pressed member and a releasing position to press the pressed member with the pressing projection.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 18, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Kentaro NODERA, Emi KITA, Akihiro TAKAYAMA, Susumu TATEYAMA, Shinnosuke KOSHIZUKA, Tatsuya KUBO, Teppei KIKUCHI
  • Publication number: 20210033997
    Abstract: A powder amount detector detects an amount of powder in a powder container of a cylindrical shape arranged horizontally. The powder amount detector includes a pair of measuring electrodes configured to detect capacitance between the pair of measuring electrodes to detect the amount of powder. The pair of measuring electrodes is disposed around the powder container. One of the pair of measuring electrodes has a flat shape, and the other of the pair of measuring electrodes has an arc shape following a shape of the powder container.
    Type: Application
    Filed: June 29, 2020
    Publication date: February 4, 2021
    Inventors: Tatsuya Kubo, Junichi Matsumoto, Shuntaroh Tamaki, Hiroaki Okamoto
  • Publication number: 20210034007
    Abstract: A powder collection device includes a collection container configured to store powder collected and a powder amount detector including a pair of electrodes. The powder amount detector detects an amount of powder in the collection container based on capacitance between the pair of electrodes.
    Type: Application
    Filed: July 20, 2020
    Publication date: February 4, 2021
    Inventors: Shuntaroh TAMAKI, Junichi MATSUMOTO, Tatsuya KUBO, Hiroaki OKAMOTO
  • Patent number: 10871729
    Abstract: A powder container includes a powder chamber for containing powder for forming images, a powder outlet formed in a face of the powder container, and a shutter assembly to open and close the powder outlet and including first and second shutters. The first shutter is movable between a sealing position to close the powder outlet and an open position to open the powder outlet and includes a pressed member to cancel retention of the first shutter at the sealing position. The second shutter includes a pressing projection that interferes with the pressed member of the first shutter and is movable between a shielding position to cover the pressed member without interference between the pressing projection and the pressed member and a releasing position to press the pressed member with the pressing projection.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: December 22, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kentaro Nodera, Emi Kita, Akihiro Takayama, Susumu Tateyama, Shinnosuke Koshizuka, Tatsuya Kubo, Teppei Kikuchi
  • Patent number: 10847279
    Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: November 24, 2020
    Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Tatsuya Kubo, Toshikatsu Kojima, Tetsuo Sakai, Akihiro Yamano, Masahiro Yanagida
  • Publication number: 20200313189
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 1, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20200313190
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 1, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20200301313
    Abstract: A developing device includes a developing roller to rotate in a predetermined direction of rotation and opposed to or in contact with an image bearer to form a development range, a cover to cover the developing roller downstream from the development range in the predetermined direction of rotation, a sheet member cantilevered by the cover to contact the developing roller with a flat face of the sheet member while trailing along the predetermined direction of rotation at a position downstream from the development range. The cover includes a large gap portion to form a first gap in a first predetermined range in the predetermined direction of rotation and a small gap portion disposed adjacent to and downstream from the large gap portion in the predetermined direction of rotation to form a second gap smaller than the first gap in a second predetermined range in the predetermined direction of rotation.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 24, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Takuya SUGANUMA, Tatsuya Kubo