Patents Assigned to Karakawa Fancy Plywood Works Ltd.
  • Grooved sheet material
    Patent number: 4054165
    Abstract: The invention provides a method, and apparatus for carrying out the method, of preparing a sheet material having two sets of grooves disposed one across the other, one set of grooves being continuous and the other set of grooves being formed in an intermittent and alternated manner simulating ladder pattern or brickwork. The material may be a simple sheet, especially chipboard or hardboard, or a laminated sheet prepared with strip material secured on a base, especially strip wood on a veneer or paper base.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: October 18, 1977
    Assignee: Karakawa Fancy Plywood Works Ltd.
    Inventor: Takuji Karakawa