Patents Assigned to Taisei Kako Kabushiki Kaisha
  • Plastic film product
    Patent number: 4543279
    Abstract: A plastic film product, such as a sealed bag, wound film or adhesive tape, has a plurality of random scratches or cuts having notches toward the other side of the film, formed along the edges thereof so as to be shallow and small enough to be invisible to the naked eye in order to reduce resistance to tearing perpendicular to the edges.
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: September 24, 1985
    Assignee: Taisei Kako Kabushiki Kaisha
    Inventor: Hisao Kai