Patents by Inventor Toshirou Uchida

Toshirou Uchida 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).

  • ELECTROPHOTOGRAPHY CLEANING BLADE, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMATION DEVICE
    Publication number: 20230259062
    Abstract: An electrophotographic cleaning blade comprising: an elastic member containing polyurethane; and a support member supporting the elastic member, and cleaning a surface of a member to be cleaned in motion, by contact of part of the elastic member against the surface of the member to be cleaned, wherein the elastic member has, at least on the tip side, a plate shape having a main surface facing the member to be cleaned and a leading end surface that forms a tip side edge together with the main surface, and a coefficient of variation of area ratios of white regions in each of sections of a binarized image created from grayscale phase image obtained from the leading end surface, is 20.00 or less, and a value of HM1-HM2 is larger than 0.10 N/mm2.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 17, 2023
    Inventors: HIDEKAZU MATSUDA, ARIHIRO YAMAMOTO, TOSHIROU UCHIDA, KENYA TERADA
  • Electrophotographic cleaning blade, process cartridge, and electrophotographic image forming apparatus
    Patent number: 11630411
    Abstract: The present invention is aimed at providing an electrophotographic cleaning blade that has excellent chipping resistance and can exhibit excellent cleaning performance. This cleaning blade is provided with an elastic member that includes a polyurethane and a support member that supports the elastic member, and cleans the surface of a member to be cleaned that is moving, by bringing a part of the elastic member into contact with the surface of the member to be cleaned. The average value of the elastic modulus of the elastic member obtained when measured using SPM is at least 15 MPa and not more than 470 MPa, and the coefficient of variation thereof is not more than 6.0%.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: April 18, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Arihiro Yamamoto, Syoji Inoue, Masahiro Watanabe, Toshirou Uchida, Youhei Ikeda, Masanori Yokoyama, Hisao Kato, Saki Sudo, Tomoya Kawakami, Masaaki Kimura
  • ELECTROPHOTOGRAPHIC CLEANING BLADE, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS
    Publication number: 20220291622
    Abstract: The present invention is aimed at providing an electrophotographic cleaning blade that has excellent chipping resistance and can exhibit excellent cleaning performance. This cleaning blade is provided with an elastic member that comprises a polyurethane and a support member that supports the elastic member, and cleans the surface of a member to be cleaned that is moving, by bringing a part of the elastic member into contact with the surface of the member to be cleaned. The average value of the elastic modulus of the elastic member obtained when measured using SPM is at least 15 MPa and not more than 470 MPa, and the coefficient of variation thereof is not more than 6.0%.
    Type: Application
    Filed: May 27, 2022
    Publication date: September 15, 2022
    Inventors: Arihiro Yamamoto, Syoji Inoue, Masahiro Watanabe, Toshirou Uchida, Youhei Ikeda, Masanori Yokoyama, Hisao Kato, Saki Sudo, Tomoya Kawakami, Masaaki Kimura