Patents by Inventor Kimihiro Tanaka

Kimihiro Tanaka 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: 11204570
    Abstract: A contact-separation mechanism includes a cam to rotate to move a contact-separation member to and from a counterpart member, a detection target to rotate together with the cam, and a detector to detect presence or absence of the detection target in a detection area of the detector, and circuitry. The cam has a reference range. The circuitry issues a rotation stop instruction of the cam after a target time elapses from passing of the reference range of the detection target through the detection area, and sets the target time based on a duration of an immediately preceding passing of the reference range through the detection area.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: December 21, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeo Nanno, Kimihiro Tanaka, Tamotsu Ikeda, Kenji Tomita, Osamu Saito
  • Publication number: 20200172359
    Abstract: A contact-separation mechanism includes a cam to rotate to move a contact-separation member to and from a counterpart member, a detection target to rotate together with the cam, and a detector to detect presence or absence of the detection target in a detection area of the detector, and circuitry. The cam has a reference range. The circuitry issues a rotation stop instruction of the cam after a target time elapses from passing of the reference range of the detection target through the detection area, and sets the target time based on a duration of an immediately preceding passing of the reference range through the detection area.
    Type: Application
    Filed: October 7, 2019
    Publication date: June 4, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: SHIGEO NANNO, Kimihiro Tanaka, Tamotsu Ikeda, Kenji Tomita, Osamu Saito
  • Patent number: 10591853
    Abstract: A moving device, which is included in an image forming apparatus, includes a cam, a moving body, a biasing body, a drive source and a drive transmission device. The moving body is configured to be moved by the cam. The biasing body is configured to apply a biasing force to bias the moving body toward the cam. The drive source is configured to apply a driving force to the cam. The drive transmission device is configured to transmit the driving force to the cam and includes a load applying body configured to apply a load to a rotation of the cam.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: March 17, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura, Hiroaki Nieda
  • Patent number: 10429786
    Abstract: A drive transmission device, which is included in an image forming apparatus, includes a drive transmission body to which a drive force is applied from a driving source, and a rotary shaft having a press-in portion mounted on one end thereof in the axial direction. The press-in portion has multiple planes disposed parallel to an axial direction and configured to receive the drive transmission body. The multiple planes include upstream and downstream side planes disposed downstream from the upstream side plane in a press-in direction of the drive transmission body. The upstream and downstream side planes are aligned along the press-in direction of the drive transmission body and have respective distances different from each other from an axial center of the rotary shaft. A distance from the downstream side plane to the axial center is greater than a distance from the upstream side plane to the axial center.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: October 1, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kenji Tomita, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
  • Patent number: 10268143
    Abstract: A drive device, which is included in an image forming apparatus, includes a drive source, a drive switching device configured to switch between a transmission state and a halting state, a first rotary body having a rotary shaft, a first drive transmission passage through which a driving force is transmitted to the first rotary body, a second rotary body, a second drive transmission passage through which the driving force is transmitted to the second rotary body, a drive transmission body rotatably mounted on the rotary shaft of the first rotary body, and an input drive transmission body mounted on the rotary shaft of the first rotary body and configured to input the driving force to the rotary shaft of the first rotary body, the input drive transmission body configured to rotate together with the drive transmission body as a single unit.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: April 23, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kimihiro Tanaka, Kenji Tomita, Yohei Miura, Kentaro Uji
  • Publication number: 20190018353
    Abstract: A drive transmission device, which is included in an image forming apparatus, includes a drive transmission body to which a drive force is applied from a driving source, and a rotary shaft having a press-in portion mounted on one end thereof in the axial direction. The press-in portion has multiple planes disposed parallel to an axial direction and configured to receive the drive transmission body. The multiple planes include upstream and downstream side planes disposed downstream from the upstream side plane in a press-in direction of the drive transmission body. The upstream and downstream side planes are aligned along the press-in direction of the drive transmission body and have respective distances different from each other from an axial center of the rotary shaft. A distance from the downstream side plane to the axial center is greater than a distance from the upstream side plane to the axial center.
    Type: Application
    Filed: July 12, 2018
    Publication date: January 17, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji TOMITA, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
  • Patent number: 10054884
    Abstract: A fixing device, which is included in an image forming apparatus, includes a heater, a heating target body, a biasing body, a pressure body, a moving body, a drive source, and a drive transmitter. The heating target body is configured to be heated by the heater. The biasing body is configured to apply a biasing force. The pressure body is configured to be pressed by the biasing body toward the heating target body. The moving body is configured to move the pressure body away from the heating target body against the biasing force applied by the biasing body. The drive source is configured to apply a driving force. The drive transmitter is configured to transmit the driving force of the drive source to the moving body and includes a planetary gear device and a worm gear.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: August 21, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura
  • Publication number: 20180224779
    Abstract: A moving device, which is included in an image forming apparatus, includes a cam, a moving body, a biasing body, a drive source and a drive transmission device. The moving body is configured to be moved by the cam. The biasing body is configured to apply a biasing force to bias the moving body toward the cam. The drive source is configured to apply a driving force to the cam. The drive transmission device is configured to transmit the driving force to the cam and includes a load applying body configured to apply a load to a rotation of the cam.
    Type: Application
    Filed: January 24, 2018
    Publication date: August 9, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA, Hiroaki NIEDA
  • Publication number: 20180181030
    Abstract: A drive device, which is included in an image forming apparatus, includes a drive source, a drive switching device configured to switch between a transmission state and a halting state, a first rotary body having a rotary shaft, a first drive transmission passage through which a driving force is transmitted to the first rotary body, a second rotary body, a second drive transmission passage through which the driving force is transmitted to the second rotary body, a drive transmission body rotatably mounted on the rotary shaft of the first rotary body, and an input drive transmission body mounted on the rotary shaft of the first rotary body and configured to input the driving force to the rotary shaft of the first rotary body, the input drive transmission body configured to rotate together with the drive transmission body as a single unit.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 28, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Kimihiro TANAKA, Kenji TOMITA, Yohei MIURA, Kentaro UJI
  • Publication number: 20170343937
    Abstract: A fixing device, which is included in an image forming apparatus, includes a heater, a heating target body, a biasing body, a pressure body, a moving body, a drive source, and a drive transmitter. The heating target body is configured to be heated by the heater. The biasing body is configured to apply a biasing force. The pressure body is configured to be pressed by the biasing body toward the heating target body. The moving body is configured to move the pressure body away from the heating target body against the biasing force applied by the biasing body. The drive source is configured to apply a driving force. The drive transmitter is configured to transmit the driving force of the drive source to the moving body and includes a planetary gear device and a worm gear.
    Type: Application
    Filed: May 24, 2017
    Publication date: November 30, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA
  • Patent number: 9510052
    Abstract: There is provided a broadcast receiving terminal that includes a reception unit, a display unit, and a reservation unit. The reception unit receives, over a network, content information, the content information including trailer information and reception reservation information. The display unit displays trailer content. The reservation unit reserves reception of the broadcast program.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: November 29, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiro Tanaka, Hideki Mitani
  • Patent number: 9244417
    Abstract: An image forming apparatus includes an image bearer, an image forming unit, an intermediate transfer member, a secondary transfer member, an image detector, a computing device, and a conveyor device. The computing device calculates a traveling speed of the intermediate transfer member based on detection information provided by the image detector. The conveyor device continuously transports to a secondary transfer portion a plurality of recording media one by one at a predetermined interval between successive recording media. The image forming unit forms a test image at a space between successive recording-medium contact regions of the intermediate transfer member at which the recording medium contacts the intermediate transfer member. A travel distance of the intermediate transfer member from the detection position on the intermediate transfer member to the secondary transfer portion in a traveling direction thereof is shorter than the space between the successive recording-medium contact regions.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
  • Patent number: 9182719
    Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: November 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
  • Publication number: 20150281791
    Abstract: There is provided a broadcast receiving terminal that includes a reception unit, a display unit, and a reservation unit. The reception unit receives, over a network, content information, the content information including trailer information and reception reservation information. The display unit displays trailer content. The reservation unit reserves reception of the broadcast program.
    Type: Application
    Filed: March 24, 2015
    Publication date: October 1, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiro TANAKA, Hideki MITANI
  • Publication number: 20150220033
    Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.
    Type: Application
    Filed: April 13, 2015
    Publication date: August 6, 2015
    Inventors: Yuuki SHIGA, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
  • Publication number: 20150153686
    Abstract: An image forming apparatus includes an image bearer, an image forming unit, an intermediate transfer member, a secondary transfer member, an image detector, a computing device, and a conveyor device. The computing device calculates a traveling speed of the intermediate transfer member based on detection information provided by the image detector. The conveyor device continuously transports to a secondary transfer portion a plurality of recording media one by one at a predetermined interval between successive recording media. The image forming unit forms a test image at a space between successive recording-medium contact regions of the intermediate transfer member at which the recording medium contacts the intermediate transfer member. A travel distance of the intermediate transfer member from the detection position on the intermediate transfer member to the secondary transfer portion in a traveling direction thereof is shorter than the space between the successive recording-medium contact regions.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 4, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
  • Patent number: 9031466
    Abstract: An image forming apparatus includes a body, an image carrier provided in the body and configured to form an image thereon, a first gear to transmit a rotation driving force to the image carrier, a first rotary shaft to which the image carrier and the first gear are attached, a second gear to mesh with the first gear and transmit the rotation driving force to the first gear, a second rotary shaft to which the second gear is attached, a drive source configured to drive to rotate the image carrier via the first gear and the second gear, a first holder to hold the first rotary shaft of the first gear, and a second holder to hold the second rotary shaft of the second gear, and a relative position between the first holder and the second holder therein is adjustable.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: May 12, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Takashi Fujimoto, Kimihiro Tanaka, Kunihiko Nishioka
  • Patent number: 9025986
    Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
  • Publication number: 20140119777
    Abstract: An image forming apparatus includes a body, an image carrier provided in the body and configured to form an image thereon, a first gear to transmit a rotation driving force to the image carrier, a first rotary shaft to which the image carrier and the first gear are attached, a second gear to mesh with the first gear and transmit the rotation driving force to the first gear, a second rotary shaft to which the second gear is attached, a drive source configured to drive to rotate the image carrier via the first gear and the second gear, a first holder to hold the first rotary shaft of the first gear, and a second holder to hold the second rotary shaft of the second gear, and a relative position between the first holder and the second holder therein is adjustable.
    Type: Application
    Filed: October 11, 2013
    Publication date: May 1, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Takashi FUJIMOTO, Kimihiro TANAKA, Kunihiko NISHIOKA
  • Publication number: 20130322910
    Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.
    Type: Application
    Filed: May 23, 2013
    Publication date: December 5, 2013
    Inventors: Yuuki SHIGA, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka