Patents Assigned to Tokyo Magnetic Printing Co., Ltd.
  • Patent number: 4335183
    Abstract: A magnetic recording medium comprises a substrate of paper sheet and a magnetic recording layer applied to the substrate, which layer contains a magnetic material and an ultraviolet- or an electron beam-curing binder resin.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: June 15, 1982
    Assignee: Tokyo Magnetic Printing Co., Ltd.
    Inventor: Hiroshi Hosaka
  • Patent number: 4241139
    Abstract: A magnetic recording medium which has a protective layer on a magnetic recording layer coated on a substrate and said protective layer comprises polyurethane and nitrocellulose in which isopropyl alcohol originally present has been replaced by a resin selected from the group consisting of polyurethane resins, polybutadiene resins, butadiene-acrylonitrile copolymers, vinyl chloride-vinyl acetate-vinyl alcohol copolymers, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinylidene chloride copolymers, vinylidene chloride-acrylonitrile-copolymers, vinyl acetate resins, epoxy resins, phenoxy resins, polyvinylbutyral resins, polyvinyl formal resins and polyester resins.
    Type: Grant
    Filed: April 5, 1979
    Date of Patent: December 23, 1980
    Assignees: TDK Electronics Co., Ltd., Tokyo Magnetic Printing Co., Ltd.
    Inventors: Yuichi Kubota, Tsunayoshi Saito, Yoshiaki Makino