Patents by Inventor Kouji Kitao

Kouji Kitao 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).

  • Rectangular inner bag for loading into cylindrical container
    Patent number: 6195964
    Abstract: An inexpensive inner bag loaded into a cylindrical container such as a drum. The inner bag has excellent airtightness and facilitates transferring the inner bag to a separate container. The inner bag comprises two hexagonal first sheets and two pentagonal second sheets. Each first sheet has a pair of opposite sides extending longitudinally and a trapezoidal portion formed around one longitudinal end of the sheet. Each second sheet has a pair of opposite sides extending longitudinally and a triangular portion formed around one longitudinal end of the sheet. The first and second sheets are placed in an opposite relation to each other. The peripheries of the first and second sheets, excluding the other ends, are bonded together by heat-sealing.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: March 6, 2001
    Assignee: Sunstar Engineering Inc.
    Inventor: Kouji Kitao
  • Method for packing a rectangular inner bag for loading into cylindrical container
    Patent number: 6089002
    Abstract: An inexpensive inner bag loaded into a cylindrical container such as a drum. The inner bag has excellent airtightness and facilitates transferring the inner bag to a separate container. The inner bag comprises two hexagonal first sheets and two pentagonal second sheets. Each first sheet has a pair of opposite sides extending longitudinally and a trapezoidal portion formed around one longitudinal end of the sheet. Each second sheet has a pair of opposite sides extending longitudinally and a triangular portion formed around one longitudinal end of the sheet. The first and second sheets are placed in an opposite relation to each other. The peripheries of the first and second sheets, excluding the other ends, are bonded together by heat-sealing.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: July 18, 2000
    Assignee: Sunstar Engineering Inc.
    Inventor: Kouji Kitao