Patents by Inventor Yasuo Mitsuhashi

Yasuo Mitsuhashi 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: 4418137
    Abstract: An electrophotographic process comprises the steps of:developing an electric latent image with toner particle, the toner particle comprising 20-70 parts by weight of at least one resin selected from resins of Group A and 80-30 parts by weight of at least resin selected from resins of Group B, transferring the developed toner image to a paper having a smoothness of 5.varies.130 seconds (measured by Bekk method), applying pressure to the transferred toner image to fix the toner image on said paper, and repeating at least said steps, in which said resins of Group A includes a low molecular weight polyethylene, a low molecular weight polypropylene, ethyl ene-ethyl acrylate copolymer, ionomer resin and ethylene-vinyl acetate copolymer, and said resins of Group B includes natural resin modified maleic acid resin, natural resin modified pentaerythritol resin and natural resin modified glycerine resin.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: November 29, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuo Mitsuhashi, Masashi Kiuchi
  • Patent number: 4340660
    Abstract: A toner for development comprises a crosslinked vinyl polymer having a gel content of 50-99% and a crosslinked vinyl polymer having a gel content of 10-0%.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: July 20, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Kiuchi, Yoshio Takasu, Hiroshi Fukumoto, Takashi Hino, Masaki Uchiyama, Yasuo Mitsuhashi
  • Patent number: 4299900
    Abstract: A process for development comprises arranging an electrostatic image bearing member having electrostatic images on the surface and a developer carrying member at a predetermined space, an insulating magnetic developer containing 10-50% by weight of magnetic toner particles 20-35 microns in size being carried on the developer carrying member in a thickness thinner than the predetermined space, and transferring the insulating magnetic developer to the electrostatic image bearing member in the presence of a magnetic field.According to this process for development, there can be produced developed images of high fidelity, high density and high resolution and free from fog.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: November 10, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuo Mitsuhashi, Masashi Kiuchi, Yoshio Takasu, Hiroshi Fukumoto, Takashi Hino, Masaki Uchiyama
  • Patent number: 4206247
    Abstract: An electrophotographic process comprises the steps of:developing an electric latent image with toner particle, the toner particle comprising 20-70 parts by weight of at least one resin selected from resins of Group A and 80-30 parts by weight of at least resin selected from resins of Group B, transferring the developed toner image to a paper having a smoothness of 5-130 seconds (measured by Bekk method), applying pressure to the transferred toner image to fix the toner image on said paper, and repeating at least said steps, in which said resins of Group A includes a low molecular weight polyethylene, a low molecular weight polypropylene, ethylene-ethyl acrylate copolymer, ionomer resin and ethylenevinyl acetate copolymer, and said resins of Group B includes natural resin modified maleic acid resin, natural resin modified pentaerythritol resin and natural resin modified glycerine resin.
    Type: Grant
    Filed: June 6, 1978
    Date of Patent: June 3, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuo Mitsuhashi, Masashi Kiuchi
  • Patent number: 4142982
    Abstract: A toner for developing electrostatic latent images contains a resin binder mainly composed of a polyester resin having a softening point of 80-150.degree. C. according to the Ring and Ball method and a solid silicone varnish having a molecular weight of 500-2000.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: March 6, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Yamakami, Yasuo Mitsuhashi, Seiji Tomari, Kaichi Tsuchiya