Patents by Inventor Akemi Sagawa

Akemi Sagawa 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).

  • Hot melt type ink composition for ink jet
    Patent number: 5703145
    Abstract: There is disclosed a hot melt type ink for an ink jet which has a small rate of a volume change accompanied with a phase change from a melt status to a solid matter and does not cause an offset and which provides a clear color image on an OHP sheet. The above ink composition has a volume change rate falling in a range of less than 10%, preferably 8 to 4% and a phase change temperature range of 60.degree. C. to the jetting temperature.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: December 30, 1997
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Akemi Sagawa, Masahiko Sakai, Michio Ebata, Ren Itoh
  • Hot-melt ink composition
    Patent number: 5350789
    Abstract: A hot-melt ink composition for an ink jet printer comprising from 10 to 65% by weight of a polyamide resin, from 5 to 60% by weight of a fatty acid amide, from 5 to 40% by weight of a glyceride, and up to 5% by weight of a colorant. The composition is excellent in transparency to provide a highly transparent ink image on an OHP sheet.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 27, 1994
    Assignees: Hitachi Koki Co., Ltd., Hitachi, Ltd.
    Inventors: Akemi Sagawa, Ren Itoh, Masahiko Sakai, Riyuuichi Shimizu