Patents by Inventor Akinobu Saito

Akinobu Saito 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).

  • CURABLE EPOXIDE COMPOSITION
    Publication number: 20210324249
    Abstract: An object of the present invention is to provide a composite material including an epoxide resin, having an improved strength. The object can be solved by a curable epoxide composition comprising an epoxide compound; a carbon fiber; a curing agent; and phosphite ester or phosphate ester. According to the present invention, a strength of the curable epoxide composition comprising a carbon fiber can be improved.
    Type: Application
    Filed: July 1, 2021
    Publication date: October 21, 2021
    Inventors: Akinobu SAITO, Shuichi WATANABE, Takakuni KAWANO, Shuichi MATAKAWA
  • Curable epoxide composition
    Patent number: 11084960
    Abstract: An object of the present invention is to provide a composite material including an epoxide resin, having an improved strength. The object can be solved by a curable epoxide composition comprising an epoxide compound; a carbon fiber; a curing agent; and phosphite ester or phosphate ester. According to the present invention, a strength of the curable epoxide composition comprising a carbon fiber can be improved.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: August 10, 2021
    Assignee: T&K TOKA CO., LTD.
    Inventors: Akinobu Saito, Shuichi Watanabe, Takakuni Kawano, Shuichi Matakawa
  • Process cartridge, image forming apparatus and cleaning apparatus
    Patent number: 11022933
    Abstract: A process cartridge includes a seal member contacting an image bearing member upstream in the rotation direction of the image bearing member from a cleaning member and allowing the developer to move from upstream in the rotation direction from the contact part between the seal member and the image bearing to downstream from the contact part while regulating movement from downstream to upstream from the contact part. The developer has surface protrusions containing an organic silicon polymer, wherein either (i) the work function of the seal member is greater than the work function of the developer when the developer has a negative charging polarity and is smaller than the work function of the developer when the developer has a positive charging polarity, or (ii) the absolute value of the difference between the work function of the seal member and the work function of the developer is within a predetermined range.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: June 1, 2021
    Assignee: CANON KABUSHI KIKAISHA
    Inventors: Kazunori Hashimoto, Katsuhiro Kojima, Toshiaki Takeuchi, Yasukazu Ikami, Kosuke Ikada, Yoshihiro Mitsui, Yuichiro Hirata, Go Shindo, Akinobu Saito, Yuhei Terui, Noriyoshi Umeda, Tomonori Matsunaga, Shohei Kototani, Masamichi Sato
  • Developing device, process cartridge and image forming apparatus
    Patent number: 10852662
    Abstract: A developing device includes a developer carrying member, a developing frame, and a regulating member. The regulating member includes a curved surface portion contactable to a surface of the developer carrying member, and satisfies the following relationships: 200 MPa?HM?1100 MPa, and 0.08 mm?Rb?0.3 mm, where HM is a Martens hardness of toner contained in the developer under a maximum load of 2.0×10?4 N, and Rb is a radius of curvature of the curved surface portion.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: December 1, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takuya Oka, Yoshihiro Mitsui, Akinobu Saito, Shinichi Agata, Kentaro Yamawaki
  • PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND CLEANING APPARATUS
    Publication number: 20200363768
    Abstract: A process cartridge includes a seal member contacting an image bearing member upstream in the rotation direction of the image bearing member from a cleaning member and allowing the developer to move from upstream in the rotation direction from the contact part between the seal member and the image bearing to downstream from the contact part while regulating movement from downstream to upstream from the contact part. The developer has surface protrusions containing an organic silicon polymer, wherein either (i) the work function of the seal member is greater than the work function of the developer when the developer has a negative charging polarity and is smaller than the work function of the developer when the developer has a positive charging polarity, or (ii) the absolute value of the difference between the work function of the seal member and the work function of the developer is within a predetermined range.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Inventors: Kazunori Hashimoto, Katsuhiro Kojima, Toshiaki Takeuchi, Yasukazu Ikami, Kosuke Ikada, Yoshihiro Mitsui, Yuichiro Hirata, Go Shindo, Akinobu Saito, Yuhei Terui, Noriyoshi Umeda, Tomonori Matsunaga, Shohei Kototani, Masamichi Sato
  • CURABLE EPOXIDE COMPOSITION
    Publication number: 20200231850
    Abstract: An object of the present invention is to provide a composite material including an epoxide resin, having an improved strength. The object can be solved by a curable epoxide composition comprising an epoxide compound; a carbon fiber; a curing agent; and phosphite ester or phosphate ester. According to the present invention, a strength of the curable epoxide composition comprising a carbon fiber can be improved.
    Type: Application
    Filed: May 17, 2019
    Publication date: July 23, 2020
    Inventors: Akinobu SAITO, Shuichi WATANABE, Takakuni KAWANO, Shuichi MATAKAWA
  • DEVELOPING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS
    Publication number: 20200150558
    Abstract: A developing device includes a developer carrying member, a developing frame, and a regulating member. The regulating member includes a curved surface portion contactable to a surface of the developer carrying member, and satisfies the following relationships: 200 MPa?HM?1100 MPa, and 0.08 mm?Rb?0.3 mm, where HM is a Martens hardness of toner contained in the developer under a maximum load of 2.0×10?4 N, and Rb is a radius of curvature of the curved surface portion.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 14, 2020
    Inventors: Takuya Oka, Yoshihiro Mitsui, Akinobu Saito, Shinichi Agata, Kentaro Yamawaki