Patents by Inventor Mituyoshi Otake

Mituyoshi Otake 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).

  • Method for producing magnetic recording medium
    Patent number: 4394404
    Abstract: A magnetic recording medium having a metamorphosed layer on the surface of the magnetic layer of conventional magnetic recording media, said metamorphosed layer being derived from some of a binder component included in the magnetic layer, can prevent the sticking trouble taking place between the magnetic recording medium and the magnetic head. Said metamorphosed layer can be formed by irradiation with ultraviolet rays in the course of the production of magnetic recording media at the step of coating a dispersion of magnetic particles on a flexible support or after the coating step. Said metamorphosed layer can also be formed on the surface of once produced magnetic recording media irrespective of having caused the sticking trouble by irradiation with ultraviolet rays. Suitable apparatuses for producing such improved magnetic recording media are also provided.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: July 19, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihisa Suzuki, Takanoli Kaizuka, Yoshiaki Hanyu, Mituyoshi Otake, Yoichi Hidano
  • Magnetic recording medium
    Patent number: 4313989
    Abstract: A magnetic recording medium having a metamorphosed layer on the surface of the magnetic layer of conventional magnetic recording media, said metamorphosed layer being derived from some of a binder component included in the magnetic layer, can prevent the sticking trouble taking place between the magnetic recording medium and the magnetic head. Said metamorphosed layer can be formed by irradiation with ultraviolet rays in the course of the production of magnetic recording media at the step of coating a dispersion of magnetic particles on a flexible support or after the coating step. Said metamorphosed layer can also be formed on the surface of once produced magnetic recording media irrespective of having caused the sticking trouble by irradiation with ultraviolet rays. Suitable apparatuses for producing such improved magnetic recording media are also provided.
    Type: Grant
    Filed: February 5, 1980
    Date of Patent: February 2, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihisa Suzuki, Takanoli Kaizuka, Yoshiaki Hanyu, Mituyoshi Otake, Yoichi Hidano