Patents by Inventor Yuji Kawaguchi

Yuji Kawaguchi 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: 9874848
    Abstract: An image forming apparatus includes a cartridge including an image bearing member, and a developer bearing member that bears a developer. A lubricant of a polarity opposite to a polarity of the developer is coated on the developer bearing member, with the lubricant being a resin. If the cartridge is new, a discharging operation of discharging the lubricant from a surface of the developer bearing member onto the image bearing member is performed.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: January 23, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuji Kawaguchi, Satoru Motohashi
  • Patent number: 9817154
    Abstract: An objective of the present invention is to provide an acrylic resin film having a violet color. The present invention is an acrylic resin film composed of an acrylic resin composition including an acrylic resin (A) and a coloring agent (B) composed of at least one selected from: a red coloring agent; a blue coloring agent; and a violet coloring agent, in which a chromatic coordinate (x, y) according to the XYZ colorimetric system under predetermined measurement conditions is within a range surrounded by four points (0.145, 0.025), (0.270, 0.240), (0.550, 0.340), and (0.600, 0.202).
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: November 14, 2017
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Yuji Kawaguchi
  • Patent number: 9817342
    Abstract: A voltage maintenance element is connected to a contact member that contacts a primary transfer surface area of an intermediate transfer belt to which toner images are transferred from a plurality of image carriers between stretch members, in such a way as to prevent the electric potential of the intermediate transfer belt from varying between respective image forming stations.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: November 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno, Tsuguhiro Yoshida, Takeo Kawanami, Taro Minobe, Masaru Shimura
  • Publication number: 20170232717
    Abstract: Provided is a laminate film that exhibits an excellent appearance, chemical resistance, and weather resistance, and suppresses yellowing even after long-term heating. The laminate film is formed from a surface layer including a vinylidene fluoride resin (F) and an acrylic resin composition (Y) layer, the acrylic resin composition (Y) containing a hindered amine light stabilizer having a molecular weight of 1400 or more. Further provided is a molded laminate including a base material and the laminate film laminated to the base material. Further provided is a method for producing a molded laminate including a step for producing a preform body by vacuum forming or pressure forming the laminate film in a first die, and a step for integrating the preform body and the base material by injection molding the resin that is to be the base material in a second die.
    Type: Application
    Filed: August 11, 2015
    Publication date: August 17, 2017
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Koichiro SANEFUJI, Yuji KAWAGUCHI, Yasunori KAWASE, Kazuya OAIRA
  • Publication number: 20170197394
    Abstract: Provided are a thermoplastic resin composition whereby gum formation is suppressed during manufacturing of a matte fluororesin molded article such as a film, and a fluorine-based matte film having excellent matte properties and chemical resistance, and a layered film. A thermoplastic resin composition (?) for a chemical-resistant matte film, comprising a fluorine-based resin (A), a matting agent (B) which is a thermoplastic resin insoluble in the fluorine-based resin (A), and a thermoplastic resin (C) soluble in the fluorine-based resin (A). A thermoplastic resin composition (?) containing the fluorine-based resin (A) and an acrylic matting agent (D) which is a thermoplastic resin, the content ratio of alkyl acrylate units with respect to 100% by mass of monofunctional monomer units in the monomer units constituting the matting agent (D) being 50-100% by mass, and the content ratio of other monofunctional monomer units being 0-50% by mass.
    Type: Application
    Filed: July 14, 2015
    Publication date: July 13, 2017
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Yasunori KAWASE, Yuji KAWAGUCHI, Koichiro SANEFUJI
  • Patent number: 9703232
    Abstract: An image forming apparatus includes image forming portions each including an image bearing member, a charging portion, an exposure portion, a developing portion including a developing member, and a cleaning member; a contact-and-separation portion; a voltage source; and a control means. An operation is executed in a contact state of the developing member with the image bearing member at the image forming portion where the image is formed, in a separated state of the developing member from the image bearing member at the image forming portion where the image is not formed and in a state in which the image bearing members of the image forming portions where the image is formed and is not formed are driven. When the operation is continuously executed, the control means executes a contacting operation at the image forming portion where the image is not formed.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: July 11, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takaaki Shinkawa, Yuji Kawaguchi, Takahiro Ikeda, Jun Miura, Shunsuke Mizukoshi
  • Publication number: 20170090331
    Abstract: The present invention has a control portion configured to control a charging bias to be applied to a charging member and a first exposure amount with respect to humidity inside an image forming apparatus and a thickness of a photosensitive layer of a photoreceptor, and the control portion controls the charging bias and the first exposure amount so that a potential difference between a non-image forming portion and the charging member 12 increases as the humidity decreases, and decreases as the humidity increases.
    Type: Application
    Filed: September 20, 2016
    Publication date: March 30, 2017
    Inventor: Yuji Kawaguchi
  • Publication number: 20160320727
    Abstract: A voltage maintenance element is connected to a contact member that contacts a primary transfer surface area of an intermediate transfer belt to which toner images are transferred from a plurality of image carriers between stretch members, in such a way as to prevent the electric potential of the intermediate transfer belt from varying between respective stations.
    Type: Application
    Filed: July 11, 2016
    Publication date: November 3, 2016
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno, Tsuguhiro Yoshida, Takeo Kawanami, Taro Minobe, Masaru Shimura
  • Publication number: 20160266523
    Abstract: An image forming apparatus operable in a mode of forming an image using only a part of image forming stations. In the mode, a developing device contacts an image bearing member in a part of the image forming stations, and the developing device is spaced from the image bearing member in the rest of the image forming stations. The contact pressure between the image bearing member and a transferring device is made smaller in the rest than in the part. The image forming operation in the mode is executed while the image bearing members of the part and the rest are rotated. A controller is configured such that when the operation in the mode is continuously executed for a time period longer than a predetermined period, the contact pressure in the rest is made larger than the above-mentioned smaller contact pressure.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 15, 2016
    Inventors: Shunsuke Mizukoshi, Takaaki Shinkawa, Jun Miura, Takahiro Ikeda, Yuji Kawaguchi
  • Patent number: 9417568
    Abstract: A voltage maintenance element is connected to a contact member that contacts a primary transfer surface area of an intermediate transfer belt to which toner images are transferred from a plurality of image carriers between stretch members, in such a way as to prevent the electric potential of the intermediate transfer belt from varying between respective image forming stations.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno, Tsuguhiro Yoshida, Takeo Kawanami, Taro Minobe, Masaru Shimura
  • Publication number: 20160231665
    Abstract: An image forming apparatus includes image forming portions each including an image bearing member, a charging portion, an exposure portion, a developing portion including a developing member, and a cleaning member; a contact-and-separation portion; a voltage source; and a control means. An operation is executed in a contact state of the developing member with the image bearing member at the image forming portion where the image is formed, in a separated state of the developing member from the image bearing member at the image forming portion where the image is not formed and in a state in which the image bearing members of the image forming portions where the image is formed and is not formed are driven. When the operation is continuously executed, the control means executes a contacting operation at the image forming portion where the image is not formed.
    Type: Application
    Filed: February 9, 2016
    Publication date: August 11, 2016
    Inventors: Takaaki Shinkawa, Yuji Kawaguchi, Takahiro Ikeda, Jun Miura, Shunsuke Mizukoshi
  • Publication number: 20160212402
    Abstract: A spatial information visualization apparatus in an embodiment includes a storage, a vacant space processor, a spatial information generator, and an image generator. The storage stores design dimensions of a target space, and measurement information indicating coordinates of a measurement point of the target space measured by scanning the target space from a plurality of different reference points in the target space, for each of the reference points. The vacant space processor specifies a vacant space existing in the measured space stored in the storage, on the basis of the coordinates of the measurement point of the target space included in the measurement information read for each of the reference points from the storage, coordinates of the reference point, and the design dimensions of the space.
    Type: Application
    Filed: January 11, 2016
    Publication date: July 21, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiro MARUYAMA, Makoto HATAKEYAMA, Yuji KAWAGUCHI, Tetsuo ENDOH, Shohei MATSUMOTO
  • Patent number: 9256187
    Abstract: A control unit is provided which controls at least one of a first power supply unit (a secondary transfer power supply connected to a secondary transfer roller) and a second power supply unit (high-voltage power supplies connected to a conductive brush and a conductive roller) so that a current supplied to a primary transfer region from a beginning of primary transfer until a beginning of secondary transfer has a magnitude larger than a magnitude of a current supplied to the primary transfer region from a beginning of image formation until the beginning of the primary transfer.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: February 9, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaru Ohno, Shinji Katagiri, Yuji Kawaguchi
  • Patent number: 9250576
    Abstract: It has been difficult to ensure satisfactory secondary transfer performance while ensuring satisfactory primary transfer performance by passing a current in the circumferential direction of an intermediate transfer belt from a current supply member. To satisfy a relationship of Rv>Rs, where Rv is resistance in the thickness direction of an intermediate transfer belt and Rs is resistance in the circumferential direction of the intermediate transfer belt over the distance between an image carrier located most upstream and an image carrier located most downstream in the movement direction of the intermediate transfer belt.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: February 2, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Kawaguchi, Shinji Katagiri, Masaru Ohno, Satoshi Takami, Yoshikuni Ito
  • Publication number: 20150368414
    Abstract: An acrylic resin film which contains a polymer (A1) that is obtained by polymerizing a monomer component that contains 10-100% by mass of i-butyl methacrylate is described, where the acrylic resin film has excellent light transmittance, while exhibiting excellent adhesion to a polyolefin resin. A solar cell module which uses the acrylic resin film is also described.
    Type: Application
    Filed: October 17, 2013
    Publication date: December 24, 2015
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Yuji Kawaguchi, Yuhei Konokawa
  • Publication number: 20150316874
    Abstract: A voltage maintenance element is connected to a contact member that contacts a primary transfer surface area of an intermediate transfer belt to which toner images are transferred from a plurality of image carriers between stretch members, in such a way as to prevent the electric potential of the intermediate transfer belt from varying between respective stations.
    Type: Application
    Filed: July 13, 2015
    Publication date: November 5, 2015
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno, Tsuguhiro Yoshida, Takeo Kawanami, Taro Minobe, Masaru Shimura
  • Patent number: 9176436
    Abstract: When secondary-transfer residual toner adheres to a brush member, the secondary-transfer residual toner is concentrated on an end of the brush member and it is difficult to uniformly charge the secondary-transfer residual toner. The secondary-transfer residual toner can be recovered to the roots of conductive fibers of the brush member by satisfying the relationship Rb?Ri, where Rb (?) is a resistance value of the brush member and Ri (?) is a resistance value of an intermediate transfer member in an area where the intermediate transfer member is in contact with the brush member.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: November 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno
  • Publication number: 20150301495
    Abstract: An object of the present invention is to maintain image quality in a configuration in which a lubricant is coated on a developing roller. An image forming apparatus detachably includes a process cartridge including an image bearing member and a developer bearing member that bears developer. A lubricant of a polarity opposite to a polarity of the developer is coated on the developer bearing member. When the process cartridge is new, a discharging operation of discharging the lubricant from a surface of the developer bearing member onto the image bearing member is performed.
    Type: Application
    Filed: April 10, 2015
    Publication date: October 22, 2015
    Inventors: Yuji Kawaguchi, Satoru Motohashi
  • Patent number: 9158238
    Abstract: A voltage maintenance element is connected to a contact member that contacts a primary transfer surface area of an intermediate transfer belt to which toner images are transferred from a plurality of image carriers between stretch members, in such a way as to prevent the electric potential of the intermediate transfer belt from varying between respective image forming stations.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 13, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Katagiri, Yuji Kawaguchi, Masaru Ohno, Tsuguhiro Yoshida, Takeo Kawanami, Taro Minobe, Masaru Shimura
  • Patent number: 9128411
    Abstract: A developing device includes a developing chamber provided with a developing roller that conveys toner to a developing area, and a toner regulating member that is in contact with a surface of the developing roller; and a toner container that contains the toner. An opening that allows the developing chamber and the toner container to communicate with each other is closed by a seal member that prevents the toner in the toner container from flowing into the developing chamber, and the seal member is removable from the opening. Spherical resin particles are provided at least in a contact portion between the developing roller and the toner regulating member. A Martens hardness of the spherical resin particles is 0.5 N/mm2 or higher and 45 N/mm2 or lower, and a restoring elastic power of the spherical resin particles is 70% or higher.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: September 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minoru Nakamura, Takuya Kitamura, Kouki Yano, Yuji Kawaguchi