Patents by Inventor Junko Hirata

Junko Hirata 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: 11960225
    Abstract: An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: April 16, 2024
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Yamaguchi, Kohei Matsuda, Hiroki Ogino, Yasushi Katsuta, Kaori Noguchi, Junko Hirata, Akira Kuroda, Yuki Nishizawa, Tsutomu Shimano, Toru Oguma
  • Publication number: 20220269201
    Abstract: An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.
    Type: Application
    Filed: May 12, 2022
    Publication date: August 25, 2022
    Inventors: Koji Yamaguchi, Kohei Matsuda, Hiroki Ogino, Yasushi Katsuta, Kaori Noguchi, Junko Hirata, Akira Kuroda, Yuki Nishizawa, Tsutomu Shimano, Toru Oguma
  • Publication number: 20220221807
    Abstract: An image forming apparatus to which a cartridge including a developer accommodating portion for accommodating a developer is detachably mountable includes an image bearing member, an exposure unit for exposing the image bearing member to light to form an electrostatic latent image on the image bearing member, a light receiving portion provided in the cartridge and for receiving the light emitted from the exposure unit, and a detecting portion for detecting vibration of the cartridge from a light reception value of the light received by the light receiving portion.
    Type: Application
    Filed: March 30, 2022
    Publication date: July 14, 2022
    Inventors: Kohei Matsuda, Junko Hirata, Kazunori Hashimoto, Yasushi Katsuta, Makoto Hayashida, Yasunori Toriyama, Hiroomi Matsuzaki, Fumito Nonaka, Kazuki Matsumoto, Tetsuya Nishiguchi
  • Patent number: 11360416
    Abstract: An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: June 14, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Yamaguchi, Kohei Matsuda, Hiroki Ogino, Yasushi Katsuta, Kaori Noguchi, Junko Hirata, Akira Kuroda, Yuki Nishizawa, Tsutomu Shimano, Toru Oguma
  • Publication number: 20210191297
    Abstract: An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.
    Type: Application
    Filed: December 11, 2020
    Publication date: June 24, 2021
    Inventors: Koji Yamaguchi, Kohei Matsuda, Hiroki Ogino, Yasushi Katsuta, Kaori Noguchi, Junko Hirata, Akira Kuroda, Yuki Nishizawa, Tsutomu Shimano, Toru Oguma
  • Patent number: 8124306
    Abstract: The object of the present invention is to provide a magnetic toner enabling an image with high image density and excellent image reproducibility to be obtained, which is excellent in fluidity, charging stability, and charging uniformity, even for long-term use, and also enabling an image whose fogging, ghost, and scattering are suppressed to be obtained. The magnetic toner has at least a binder resin and a magnetic material, where, the magnetic material is an magnetic iron oxide whose dielectric breakdown voltage of the magnetic material is 160 to 1600 V/cm, and the dielectric loss tangent (tan ?) of the magnetic toner at 100 kHz and 40° C. is 2.0×10?3 to 1.0×10?2.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: February 28, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junko Hirata, Yoshihiro Ogawa, Yusuke Hasegawa, Kouji Nishikawa, Miho Okazaki, Takashige Kasuya
  • Publication number: 20090186288
    Abstract: The object of the present invention is to provide a magnetic toner enabling an image with high image density and excellent image reproducibility to be obtained, which is excellent in fluidity, charging stability, and charging uniformity, even for long-term use, and also enabling an image whose fogging, ghost, and scattering are suppressed to be obtained. The magnetic toner has at least a binder resin and a magnetic material, where, the magnetic material is an magnetic iron oxide whose dielectric breakdown voltage of the magnetic material is 160 to 1600 V/cm, and the dielectric loss tangent (tan ?) of the magnetic toner at 100 kHz and 40° C. is 2.0×10?3 to 1.0×10?2.
    Type: Application
    Filed: April 25, 2007
    Publication date: July 23, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Junko Hirata, Yoshihiro Ogawa, Yusuke Hasegawa, Kouji Nishikawa, Miho Okazaki, Takashige Kasuya
  • Publication number: 20080187853
    Abstract: The present invention aims to provide a toner having excellent developability and excellent low-temperature fixability without causing adhesion of ejected sheets even in a high-speed oilless fixing system and capable of preventing a frameless printing from causing a twisted offseting phenomenon. Specifically, provided is a toner having toner particles including at least a binder resin and a colorant, in which, when the toner is dissolved in a tetrahydrofuran (THF) solvent at 25° C. for 24 hours, the ratio of a THF-soluble matter having an intrinsic viscosity of 5.0×10?2 dl/g or less with respect to the total amount of the THF-soluble matter in a GPC-RALLS-viscometer analysis is 15.0 mass % to 60.0 mass %, and the ratio of a THF-soluble matter having an intrinsic viscosity of 1.5×10?1 dl/g or more with respect to the total amount of the THF-soluble matter in a GPC-RALLS-viscometer analysis is 20.0 mass % to 40.0 mass %.
    Type: Application
    Filed: March 27, 2008
    Publication date: August 7, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Syuhei Moribe, Katsuhisa Yamazaki, Daisuke Yoshiba, Junko Hirata, Masami Fujimoto, Takashige Kasuya
  • Patent number: 5835587
    Abstract: A telephone includes a telephone body, a handset and a telephone network line hold mechanism. The telephone body includes a handset cradle on which the handset is placed, a plurality of operation buttons and the like. The telephone is placed in the offhook state when the user lifts the handset from the handset cradle and placed in the on-hook state when the user places the handset on the handset cradle. The telephone network line hold mechanism is energized when the user places the handset on the telephone body at its position in which the offhook state of the telephone is retained.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: November 10, 1998
    Assignee: Sony Corporation
    Inventors: Shizuo Adachi, Junko Hirata, Hiroshi Miyamoto
  • Patent number: 5784458
    Abstract: A telephone includes a telephone body, a handset and a telephone network line hold mechanism. The telephone body includes a handset cradle on which the handset is placed, a plurality of operation buttons and the like. The telephone is placed in the offhook state when the user lifts the handset from the handset cradle and placed in the on-hook state when the user places the handset on the handset cradle. The telephone network line hold mechanism is energized when the user places the handset on the telephone body at its position in which the offhook state of the telephone is retained.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: July 21, 1998
    Assignee: Sony Corporation
    Inventors: Shizuo Adachi, Junko Hirata, Hiroshi Miyamoto
  • Patent number: 5241408
    Abstract: In a liquid crystal display device having a voltage-driven liquid crystal cell sandwiched between two spaced polarizers, the cell comprises a liquid crystal layer having a twisted molecular alignment with no applied voltage and also having an optical rotary power with respect to visible rays. In the vicinity of the cell or in close contact therewith, there is disposed an optically anisotropic layer having an optical rotary power smaller than that of the cell.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: August 31, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masahito Ishikawa, Junko Hirata, Yuzo Hisatake, Hitoshi Hatoh