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).
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Patent number: 11204570Abstract: 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: GrantFiled: October 7, 2019Date of Patent: December 21, 2021Assignee: Ricoh Company, Ltd.Inventors: Shigeo Nanno, Kimihiro Tanaka, Tamotsu Ikeda, Kenji Tomita, Osamu Saito
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Publication number: 20200172359Abstract: 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: ApplicationFiled: October 7, 2019Publication date: June 4, 2020Applicant: Ricoh Company, Ltd.Inventors: SHIGEO NANNO, Kimihiro Tanaka, Tamotsu Ikeda, Kenji Tomita, Osamu Saito
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Patent number: 10591853Abstract: 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: GrantFiled: January 24, 2018Date of Patent: March 17, 2020Assignee: Ricoh Company, Ltd.Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura, Hiroaki Nieda
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Patent number: 10429786Abstract: 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: GrantFiled: July 12, 2018Date of Patent: October 1, 2019Assignee: RICOH COMPANY, LTD.Inventors: Kenji Tomita, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
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Patent number: 10268143Abstract: 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: GrantFiled: December 20, 2017Date of Patent: April 23, 2019Assignee: RICOH COMPANY, LTD.Inventors: Kimihiro Tanaka, Kenji Tomita, Yohei Miura, Kentaro Uji
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Publication number: 20190018353Abstract: 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: ApplicationFiled: July 12, 2018Publication date: January 17, 2019Applicant: Ricoh Company, Ltd.Inventors: Kenji TOMITA, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
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Patent number: 10054884Abstract: 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: GrantFiled: May 24, 2017Date of Patent: August 21, 2018Assignee: Ricoh Company, Ltd.Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura
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Publication number: 20180224779Abstract: 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: ApplicationFiled: January 24, 2018Publication date: August 9, 2018Applicant: Ricoh Company, Ltd.Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA, Hiroaki NIEDA
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Publication number: 20180181030Abstract: 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: ApplicationFiled: December 20, 2017Publication date: June 28, 2018Applicant: Ricoh Company, Ltd.Inventors: Kimihiro TANAKA, Kenji TOMITA, Yohei MIURA, Kentaro UJI
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Publication number: 20170343937Abstract: 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: ApplicationFiled: May 24, 2017Publication date: November 30, 2017Applicant: Ricoh Company, Ltd.Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA
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Patent number: 9510052Abstract: 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: GrantFiled: March 24, 2015Date of Patent: November 29, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Kimihiro Tanaka, Hideki Mitani
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Patent number: 9244417Abstract: 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: GrantFiled: December 1, 2014Date of Patent: January 26, 2016Assignee: Ricoh Company, Ltd.Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
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Patent number: 9182719Abstract: 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: GrantFiled: April 13, 2015Date of Patent: November 10, 2015Assignee: Ricoh Company, Ltd.Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Publication number: 20150281791Abstract: 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: ApplicationFiled: March 24, 2015Publication date: October 1, 2015Applicant: SHARP KABUSHIKI KAISHAInventors: Kimihiro TANAKA, Hideki MITANI
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Publication number: 20150220033Abstract: 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: ApplicationFiled: April 13, 2015Publication date: August 6, 2015Inventors: Yuuki SHIGA, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Publication number: 20150153686Abstract: 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: ApplicationFiled: December 1, 2014Publication date: June 4, 2015Applicant: RICOH COMPANY, LTD.Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
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Patent number: 9031466Abstract: 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: GrantFiled: October 11, 2013Date of Patent: May 12, 2015Assignee: Ricoh Company, Ltd.Inventors: Takashi Fujimoto, Kimihiro Tanaka, Kunihiko Nishioka
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Patent number: 9025986Abstract: 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: GrantFiled: May 23, 2013Date of Patent: May 5, 2015Assignee: Ricoh Company, Ltd.Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Publication number: 20140119777Abstract: 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: ApplicationFiled: October 11, 2013Publication date: May 1, 2014Applicant: RICOH COMPANY, LTD.Inventors: Takashi FUJIMOTO, Kimihiro TANAKA, Kunihiko NISHIOKA
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Publication number: 20130322910Abstract: 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: ApplicationFiled: May 23, 2013Publication date: December 5, 2013Inventors: Yuuki SHIGA, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka