Patents by Inventor Takahito Chiba

Takahito Chiba 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: 10429773
    Abstract: A fixing device includes a fixing unit including a pressing device and a heating device and that fixes an image formed on a recording medium by nipping the recording medium with the pressing device and the heating device; a driving device that drives the fixing unit; a load detector that detects a load applied to the driving device; and an abnormality detector that detects abnormality in the fixing unit with reference to the load generated when the recording medium passes through the fixing unit.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: October 1, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi Sunohara, Takahito Chiba
  • Publication number: 20190168978
    Abstract: A rotary member support structure includes: a rotary member including a shaft; a bearing that rotatably supports the shaft of the rotary member; a pressing member that presses the bearing in one direction; and a support that supports the bearing such that the bearing is movable in a pressing direction of the pressing member. When the rotary member is not rotating, the bearing and the pressing member are in contact with each other such that the bearing is rotatable about the shaft.
    Type: Application
    Filed: August 23, 2018
    Publication date: June 6, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masataka KONISHI, Tsuyoshi SUNOHARA, Atsushi FUNADA, Yasunori FUJIMOTO, Takahito CHIBA, Takashi ANZAI
  • Publication number: 20190072884
    Abstract: A fixing device includes a fixing unit including a pressing device and a heating device and that fixes an image formed on a recording medium by nipping the recording medium with the pressing device and the heating device; a driving device that drives the fixing unit; a load detector that detects a load applied to the driving device; and an abnormality detector that detects abnormality in the fixing unit with reference to the load generated when the recording medium passes through the fixing unit.
    Type: Application
    Filed: March 9, 2018
    Publication date: March 7, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi SUNOHARA, Takahito CHIBA
  • Publication number: 20180364616
    Abstract: A rotatable-member-supporting structure includes a first rotatable member having a shaft portion, a bearing member by which the shaft portion of the first rotatable member is rotatably supported, a pressing member that presses the bearing member in one direction, and a supporting member by which the bearing member is supported in such a manner as to be retractably movable in the direction in which the pressing member presses the bearing member. A pressing force generated by the pressing member is greatest in a portion of the bearing member that is on a downstream side in a direction of rotation of the first rotatable member with respect to an intersection between the bearing member and a first virtual line extending from a center of rotation of the first rotatable member toward the pressing member in the direction in which the supporting member is retractably movable.
    Type: Application
    Filed: April 9, 2018
    Publication date: December 20, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Atsushi FUNADA, Masataka KONISHI, Tsuyoshi SUNOHARA, Yasunori FUJIMOTO, Takahito CHIBA, Takashi ANZAI
  • Publication number: 20180356761
    Abstract: A roller member includes a rotating shaft and a roller portion. The roller portion includes a first layer provided on at least a portion of an outer peripheral surface of the rotating shaft, and a second elastic layer provided on at least a portion of an outer peripheral surface of the first layer. The first layer is made of a material having a coefficient of linear expansion lower than a coefficient of linear expansion of a material of the second elastic layer.
    Type: Application
    Filed: April 1, 2018
    Publication date: December 13, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takashi ANZAI, Toshiyuki MIYATA, Yasunori FUJIMOTO, Takahito CHIBA, Keisuke SHIMOJO, Masataka KONISHI
  • Patent number: 10025237
    Abstract: An image forming apparatus includes: a transport unit configured to pinch and transport a recording medium at a first transport speed, a fixing unit configured to fix an image formed on the recording medium while pinching and transporting the recording medium, which is transported by the transport unit, at a second transport speed, a driving unit configured to drive the fixing unit, a detector configured to detect a load of the driving unit, and a controller configured to perform a control to adjust a speed difference between the first transport speed and the second transport speed with respect to a subsequently transported recording medium when the load becomes larger than a reference value after a peak value of the load when the recording medium enters the fixing unit is detected by the detector.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: July 17, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi Sunohara, Takahito Chiba, Hidehiko Yamaguchi, Hideki Moriya
  • Patent number: 9983521
    Abstract: Provided is a fixing device including a belt that generates heat by an action of a magnetic field to fix an image to a medium by the heat, a magnetic field generating unit that generates a magnetic field which heats the belt, a heat generation control member that includes a first magnetic body which is changed from ferromagnetism to paramagnetism at a Curie temperature, and suppresses heat generation of the belt, a sensor that is disposed in a first space, measures a temperature of an object present on the belt side, and is heated by an action of a magnetic field, and a second magnetic body that is disposed in a second space.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: May 29, 2018
    Assignee: FUJI XEROX CO., LTD
    Inventors: Toshiyuki Miyata, Takahito Chiba
  • Publication number: 20180074443
    Abstract: Provided is a fixing device including a belt that generates heat by an action of a magnetic field to fix an image to a medium by the heat, a magnetic field generating unit that generates a magnetic field which heats the belt, a heat generation control member that includes a first magnetic body which is changed from ferromagnetism to paramagnetism at a Curie temperature, and suppresses heat generation of the belt, a sensor that is disposed in a first space, measures a temperature of an object present on the belt side, and is heated by an action of a magnetic field, and a second magnetic body that is disposed in a second space.
    Type: Application
    Filed: February 16, 2017
    Publication date: March 15, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Toshiyuki MIYATA, Takahito CHIBA
  • Publication number: 20180067426
    Abstract: An image forming apparatus includes a transport unit configured to pinch and transport recording medium at a first transport speed, a fixing unit configured to fix an image formed on the recording medium while pinching and transporting the recording medium, which is transported by the transport unit, at a second transport speed, a driving unit configured to drive the fixing unit, a detector configured to detect a load of the driving unit, and a controller configured to perform a control to adjust a speed difference between the first transport speed and the second transport speed with respect to a subsequently transported recording medium when the load becomes larger than a reference value after a peak value of the load when the recording medium enters the fixing unit is detected by the detector.
    Type: Application
    Filed: March 13, 2017
    Publication date: March 8, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi SUNOHARA, Takahito CHIBA, Hidehiko YAMAGUCHI, Hideki MORIYA
  • Patent number: 9783382
    Abstract: Provided is a transport device including a first transport section that is driven at a first transport speed and transports a recording medium interposed therein, a second transport section that is driven at a speed different from the first transport speed, is located at a downstream of the first transport section in a transport direction, and transports the recording medium interposed therein, a detection section that detects variations in a driving load of the second transport section before and after the recording medium is discharged from the first transport section, and a derivation section that derives a thickness of the recording medium based on the variations.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: October 10, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takanori Morino, Hidehiko Yamaguchi, Hideki Moriya, Tsuyoshi Sunohara, Takahito Chiba
  • Patent number: 9776816
    Abstract: Provided is a transport device including a transport unit that transports a recording medium by interposing the recording medium, a driving unit that drives the transport unit, a detection unit that detects a peak value of a load of the driving unit when the recording medium is discharged from the transport unit, and a derivation unit that derives a thickness of the recording medium based on the peak value detected by the detection unit.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: October 3, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hideki Moriya, Hidehiko Yamaguchi, Takanori Morino, Tsuyoshi Sunohara, Takahito Chiba
  • Patent number: 9758326
    Abstract: Provided is a transport device including a transport section by which a recording medium is interposed and is transported while rotating, a driving section that drives the transport section, a control section that performs control so that the recording medium enters a predetermined position of the transport section in a rotation direction, a detection section that detects a load of the driving section during a period of time in which the recording medium is transported by the transport section, and a derivation section that derives a thickness of the recording medium based on the load.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: September 12, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hideki Moriya, Hidehiko Yamaguchi, Takanori Morino, Tsuyoshi Sunohara, Takahito Chiba
  • Patent number: 9658589
    Abstract: A transporting device includes a detecting portion that detects a load applied to a driving portion provided for transporting a medium, an identifying portion that identifies a type of the medium from a result of detection performed by the detecting portion, and a correcting portion that fits, if a predetermined instruction is made, the result of detection to a predetermined reference characteristic of the load applied to the driving portion.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: May 23, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takahito Chiba, Tsuyoshi Sunohara, Hidehiko Yamaguchi, Hideki Moriya
  • Publication number: 20170075265
    Abstract: A fixing device includes a detecting portion that detects a load applied to a driving portion configured to drive a fixing portion configured to fix an image formed on a medium, an identifying portion that identifies a type of the medium from a result of detection performed by the detecting portion, and a setting portion that sets a threshold with reference to which the identifying portion identifies the type of the medium. The threshold is set for each of different temperatures detected by a temperature detecting portion that detects a temperature of the fixing portion or for each predetermined number of media on which images are fixed.
    Type: Application
    Filed: March 4, 2016
    Publication date: March 16, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takahito CHIBA, Tsuyoshi SUNOHARA, Hidehiko YAMAGUCHI, Hideki MORIYA, Tomohiro WADA
  • Publication number: 20170075275
    Abstract: A transporting device includes a detecting portion that detects a load applied to a driving portion provided for transporting a medium, an identifying portion that identifies a type of the medium from a result of detection performed by the detecting portion, and a correcting portion that fits, if a predetermined instruction is made, the result of detection to a predetermined reference characteristic of the load applied to the driving portion.
    Type: Application
    Filed: February 8, 2016
    Publication date: March 16, 2017
    Applicant: FUJI XEROX Co., Ltd.
    Inventors: Takahito CHIBA, Tsuyoshi SUNOHARA, Hidehiko YAMAGUCHI, Hideki MORIYA
  • Publication number: 20170015514
    Abstract: Provided is a transport device including a transport section by which a recording medium is interposed and is transported while rotating, a driving section that drives the transport section, a control section that performs control so that the recording medium enters a predetermined position of the transport section in a rotation direction, a detection section that detects a load of the driving section during a period of time in which the recording medium is transported by the transport section, and a derivation section that derives a thickness of the recording medium based on the load.
    Type: Application
    Filed: January 20, 2016
    Publication date: January 19, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hideki MORIYA, Hidehiko YAMAGUCHI, Takanori MORINO, Tsuyoshi SUNOHARA, Takahito CHIBA
  • Publication number: 20170008715
    Abstract: Provided is a transport device including a first transport section that is driven at a first transport speed and transports a recording medium interposed therein, a second transport section that is driven at a speed different from the first transport speed, is located at a downstream of the first transport section in a transport direction, and transports the recording medium interposed therein, a detection section that detects variations in a driving load of the second transport section before and after the recording medium is discharged from the first transport section, and a derivation section that derives a thickness of the recording medium based on the variations.
    Type: Application
    Filed: January 20, 2016
    Publication date: January 12, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takanori Morino, Hidehiko Yamaguchi, Hideki Moriya, Tsuyoshi Sunohara, Takahito Chiba
  • Publication number: 20160368724
    Abstract: Provided is a transport device including a transport unit that transports a recording medium by interposing the recording medium, a driving unit that drives the transport unit, a detection unit that detects a peak value of a load of the driving unit when the recording medium is discharged from the transport unit, and a derivation unit that derives a thickness of the recording medium based on the peak value detected by the detection unit.
    Type: Application
    Filed: October 27, 2015
    Publication date: December 22, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hideki MORIYA, Hidehiko YAMAGUCHI, Takanori MORINO, Tsuyoshi SUNOHARA, Takahito CHIBA
  • Patent number: 9164442
    Abstract: A fixing device includes an endless belt member, a secured member disposed to contact the belt member, a heating unit that heats the belt member, and a rotary pressurizing roller including an elastic layer that is elastically deformed when the belt member is pressed against a pressing surface of the secured member to form a fixing part. The pressurizing roller is curved such that a center portion is smaller in outside diameter than end portions along the axial direction. The pressing surface is curved such that a center portion projects toward the pressurizing roller more than end portions along the longitudinal direction. On the pressing surface, an amount of projection of the center portion with respect to the end portions along the longitudinal direction is set to be larger on an output side than on an input side of the fixing part along a moving direction of the belt member.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: October 20, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuto Okabayashi, Satoshi Nakamura, Junpei Amano, Norimasa Fujiwara, Koichi Kimura, Shogo Kamiya, Toshinori Sasaki, Takahito Chiba, Masataka Konishi
  • Publication number: 20140270869
    Abstract: A fixing device includes an endless belt member, a secured member disposed to contact the belt member, a heating unit that heats the belt member, and a rotary pressurizing roller including an elastic layer that is elastically deformed when the belt member is pressed against a pressing surface of the secured member to form a fixing part. The pressurizing roller is curved such that a center portion is smaller in outside diameter than end portions along the axial direction. The pressing surface is curved such that a center portion projects toward the pressurizing roller more than end portions along the longitudinal direction. On the pressing surface, an amount of projection of the center portion with respect to the end portions along the longitudinal direction is set to be larger on an output side than on an input side of the fixing part along a moving direction of the belt member.
    Type: Application
    Filed: August 20, 2013
    Publication date: September 18, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuto OKABAYASHI, Satoshi NAKAMURA, Junpei AMANO, Norimasa FUJIWARA, Koichi KIMURA, Shogo KAMIYA, Toshinori SASAKI, Takahito CHIBA, Masataka KONISHI