Patents by Inventor Satoshi Ohwada

Satoshi Ohwada 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: 11892787
    Abstract: A fixing device includes a belt having a tubular shape and extending in a longitudinal direction, and having a longitudinal end, a drive roller to rotate the belt to convey a print medium between the drive roller and the belt, a bushing located at the longitudinal end of the belt, and a guide wall adjacent to the bushing. The belt is displaceable in the longitudinal direction relative to the bushing. The bushing includes a shoulder adjacent to the longitudinal end of the belt and a stem extending from the shoulder to an inside of the belt to support the belt. The guide guides the bushing to move in a direction opposite to a conveyance direction of the print medium when the belt moves toward the bushing. The stem of the bushing includes a convex portion that is in contact with an inner surface of the belt when the belt is displaced in the longitudinal direction.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: February 6, 2024
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Tatsunori Izawa, Takayuki Horie, Yasuo Suzuki, Satoru Furuya, Satoshi Ohwada, Hiroyuki Sato, Koichi Utsunomiya
  • Patent number: 11803147
    Abstract: An endless belt includes a loop-shaped support and a surface layer formed on the support. The surface layer contains a polymer including, as monomer units, a first monomer having a polymerizable group and an aliphatic ring, a second monomer having a polymerizable group and a fluorine atom, and a third monomer having 4 or more polymerizable groups.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: October 31, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Keiji Komoto, Satoru Furuya, Satoshi Ohwada
  • Publication number: 20230195014
    Abstract: A fixing device includes a belt having a tubular shape and extending in a longitudinal direction, and having a longitudinal end, a drive roller to rotate the belt to convey a print medium between the drive roller and the belt, a bushing located at the longitudinal end of the belt, and a guide wall adjacent to the bushing. The belt is displaceable in the longitudinal direction relative to the bushing. The bushing includes a shoulder adjacent to the longitudinal end of the belt and a stem extending from the shoulder to an inside of the belt to support the belt. The guide guides the bushing to move in a direction opposite to a conveyance direction of the print medium when the belt moves toward the bushing. The stem of the bushing includes a convex portion that is in contact with an inner surface of the belt when the belt is displaced in the longitudinal direction.
    Type: Application
    Filed: May 18, 2021
    Publication date: June 22, 2023
    Inventors: Tatsunori IZAWA, Takayuki HORIE, Yasuo SUZUKI, Satoru FURUYA, Satoshi OHWADA, Hiroyuki SATO, Koichi UTSUNOMIYA
  • Publication number: 20220365466
    Abstract: An image forming apparatus includes a transfer device to transfer an unfixed toner image to a print medium, a fixing device located along a conveyance path of the print medium, and a gloss applying device. The unfixed toner image includes clear toner that is associated with a gloss image to be formed. The gloss applying device receives the print medium including the unfixed toner image, to fix the unfixed toner image to the print medium by applying heat and pressure, and to cool the heated toner image to form the gloss image.
    Type: Application
    Filed: September 22, 2020
    Publication date: November 17, 2022
    Inventors: Satoshi OHWADA, Hiroyuki SATO
  • Patent number: 11392063
    Abstract: An imaging system includes: an endless belt, a tensioning member, a heating member, a pressing member, a cleaning member. The endless belt conveys a printing medium. The tensioning member tensions the endless belt. The heating member heats the endless belt. The pressing member presses the endless belt against the heating member. The cleaning member is located outside the endless belt, between the tensioning member and the heating member, and presses the endless belt inwardly.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: July 19, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Satoshi Ohwada
  • Publication number: 20220113660
    Abstract: An endless belt includes a loop-shaped support and a surface layer formed on the support. The surface layer contains a polymer including, as monomer units, a first monomer having a polymerizable group and an aliphatic ring, a second monomer having a polymerizable group and a fluorine atom, and a third monomer having 4 or more polymerizable groups.
    Type: Application
    Filed: September 23, 2021
    Publication date: April 14, 2022
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Keiji KOMOTO, Satoru FURUYA, Satoshi OHWADA
  • Publication number: 20220066360
    Abstract: An imaging system includes: an endless belt, a tensioning member, a heating member, a pressing member, a cleaning member. The endless belt conveys a printing medium. The tensioning member tensions the endless belt. The heating member heats the endless belt. The pressing member presses the endless belt against the heating member. The cleaning member is located outside the endless belt, between the tensioning member and the heating member, and presses the endless belt inwardly.
    Type: Application
    Filed: January 17, 2020
    Publication date: March 3, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventor: Satoshi Ohwada
  • Patent number: 11226575
    Abstract: An imaging system includes a heating device, a conveyor belt including a surface layer located on an outer surface of the heating device to receive a printing medium, and a cooling device to cool the surface layer after the conveyor belt passes along the outer surface of the heating device. The surface layer includes a temperature sensitive material to vary an adhesive force of the conveyor belt with respect to the printing medium in response to a change in temperature of the surface layer. The adhesive force increases in response to an increase in temperature of the surface layer.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: January 18, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Satoshi Ohwada
  • Publication number: 20210124291
    Abstract: An imaging system includes a heating device, a conveyor belt including a surface layer located on an outer surface of the heating device to receive a printing medium, and a cooling device to cool the surface layer after the conveyor belt passes along the outer surface of the heating device. The surface layer includes a temperature sensitive material to vary an adhesive force of the conveyor belt with respect to the printing medium in response to a change in temperature of the surface layer. The adhesive force increases in response to an increase in temperature of the surface layer.
    Type: Application
    Filed: June 25, 2019
    Publication date: April 29, 2021
    Inventor: Satoshi OHWADA
  • Patent number: 5119380
    Abstract: A zero string error detection circuit which detects a specified number of zeros occurring in succession in bipolar data. The detection circuit has a relatively small gate size achieved by making the shift registers in the B8ZS or B6ZS code conversion circuit serve also for zero string monitoring. The zero string error detection circuit includes a pair of shift registers which receive serial bipolar data and convert it to parallel data composed of a specified number of bits, a code detector which, upon detecting a specific code from the parallel outputs of the shift registers, issues a reset signal to the shift registers to make the outputs of the shift registers zero, a zero string monitor which issue a zero string error detection signal when the outputs of the shift registers become zero, and a gate which inhibits the zero string monitor from issuing the zero string error detection signal during a specific period when the code detector issues a reset signal.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: June 2, 1992
    Assignee: Fujitsu Limited
    Inventors: Satoshi Ohwada, Takenao Takemura, Toru Kosugi