Patents by Inventor Hiroyo Oshima

Hiroyo Oshima 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).

  • Thermal dye-transfer type recording sheet
    Patent number: 4567114
    Abstract: A recording sheet for thermal dye-transfer type recording method, having a coating layer which is placed on a substrate, is contacted with a coloring material layer containing sublimable dye and on which the dye is transferred by heating. The coating layer includes as a pigment precipitated calcium carbonate of at least 25,000 cm.sup.2 /g specific-surface-area and as a binder saturated polyester or a mixture of saturated polyester with polyvinyl pyrrolidone. The sheet provides a clear record with superior color density.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: January 28, 1986
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Isao Kano, Yutaka Kojima, Yoshihiko Shimura, Ken Ishiguro, Koichi Nagai
  • Thermal dye-transfer type recording sheet
    Patent number: 4490435
    Abstract: A recording sheet for thermal dye-transfer type recording having a coating layer which is placed on a substrate, which is contacted with a coloring material layer containing sublimable dye and on which the sublimable dye is transferred by heating, wherein the coating layer includes an aminoalkyd resin, whereby the recording sheet provides a record with superior color density and causes no heat-adhesion between the recording sheet and a thermal transfer substrate.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: December 25, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Isao Kano, Yutaka Kojima, Ken Ishiguro, Koichi Nagai, Kunio Hata
  • Thermal dye-transfer type recording sheet
    Patent number: 4490434
    Abstract: A recording sheet for thermal-dye transfer type recording having a coating layer which is placed on a substrate which is contacted with a coloring material layer containing sublimable dye and on which the dye is transferred by heating, wherein the coating layer includes both particular fine silica and particular binder, whereby the sheet provides a clear record with superior color density.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: December 25, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Isao Kano, Yutaka Kojima, Kazuo Harada, Takeo Konno
  • Ink jet recording paper
    Patent number: 4478910
    Abstract: Ink jet recording paper comprising on a base sheet with a specific sizing degree a coating layer comprising a water-soluble polymeric binder and particular fine silica particles, wherein the sheet provides a superior aptitude for high speed recording with excellent optical density and improved clear image.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: October 23, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Yutaka Kojima, Yukio Kobayashi, Takashi Omori, Koichi Nagai
  • Thermal dye-transfer type recording sheet
    Patent number: 4474859
    Abstract: Thermal dye-transfer type recording sheet, having a coating layer which is placed on a base sheet, is contacted with a coloring material layer being solid or semisolid state at room temperature and on which a coloring material is transferred selectively by heating, wherein said coating layer comprises at least mixture of saturated polyester and polyvinyl pyrrolidone in a particular ratio. The sheet provides a very clear record with superior light fastness.
    Type: Grant
    Filed: February 5, 1982
    Date of Patent: October 2, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Yutaka Kojima, Yukio Kobayashi, Kouichi Nagai, Hajime Tani
  • Ink jet recording sheet
    Patent number: 4442172
    Abstract: Ink jet recording sheet comprising more than 1 g/m.sup.2 (as solid content) of water-soluble polymer coated onto the surface of a base sheet comprising uniformly 15-45 wt. parts of synthetic silicate 0.1-1 wt. part of a wet strength additive and 2-10 wt. parts of a particular glass fiber with respect to 100 wt. parts of wood pulp. This ink jet recording sheet provides superior ink absorbency and high recording density without feathering and also has superior stiffness and dimensional stability.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: April 10, 1984
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Hiroyo Oshima, Matsukuma Daisaku, Kojima Yutaka, Kobayashi Yukio, Nagai Koichi