Patents by Inventor Tokio Matsumoto

Tokio Matsumoto 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: 5059468
    Abstract: A magnetic recording medium is formed by disposing on a substrate a magnetic recording layer of a Co-Cr alloy. The durability and the environmental resistance of the magnetic recording medium are improved by forming protective layers including a layer of cobalt oxide and a layer of fluorine-containing resin disposed thereon, on the magnetic layer.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: October 22, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Morimi Hashimoto, Tokio Matsumoto, Takayuki Yagi, Kenji Suzuki, Hiroshi Takagi
  • Patent number: 4646105
    Abstract: A liquid jet recording method using a recording head provided with a liquid jet part comprising an orifice through which the liquid is jetted to form a flying liquid droplet and a heat action section in communication with said orifice in which section the thermal energy for jetting the liquid acts on said liquid, and an electro-thermal transducer serving as means for generating the thermal energy, said method characterized in that said thermal energy is made to act on the liquid filling said heat action section so as to jet from said orifice such amount of liquid sufficient enough to include unnecessary bubbles generated in said liquid jet part and a liquid droplet is formed by said jetted liquid whereby said unnecessary bubbles are eliminated from said liquid jet part while repeating said liquid droplet formation to perform recording with said droplets. Further, said method is characterized by applying to said electro-thermal transducer a driving signal having a voltage value in the range of 1.02 to 1.
    Type: Grant
    Filed: January 2, 1986
    Date of Patent: February 24, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tokio Matsumoto, Seiichi Aoki, Hiroto Matsuda, Masami Ikeda, Haruyuki Matsumoto, Asao Saito
  • Patent number: 4396429
    Abstract: A recording liquid comprising an aqueous liquid composition containing a water-soluble dye as recording agent is characterized in that the content of m-phenylenediamine in said composition is 1000 ppm or less.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: August 2, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tokio Matsumoto, Seiichi Aoki
  • Patent number: 4338133
    Abstract: A jet printing ink composition comprises 2 to 60 wt.% of a binder precursor of an alkoxysilane having the formula R.sub.4-n Si(OH).sub.n (n=0 to 2; and R represents a C.sub.1 -C.sub.4 alkoxy group, methoxyethoxy, ethoxyethoxy or phenoxy group) or an oligomer thereof; and 25 to 95 wt.% of a solvent for said alkoxysilane or oligomer thereof; 0.001 to 5 wt.% of a solvent soluble acid; and 0.1 to 8 wt.% of a solvent soluble dyestuff, if necessary, further comprises up to 2 wt.% of a solvent soluble inert silicone oil for inhibiting blotting and up to 3 wt.% of an electroconductive agent.
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: July 6, 1982
    Assignee: Dai Nippon Toryo Co., Ltd.
    Inventors: Tsunehiko Toyoda, Tokio Matsumoto, Toshiaki Arakawa