Patents Assigned to Svenska Utvecklingaktiebolatget
  • Patent number: 4112162
    Abstract: A chipboard beam made of glue coated chips has top and bottom layers extending for the full length of the beam consisting of elongated chips, that may be for example as much as 5cm in length oriented with their fibers in the longitudinal direction of the beam. The middle layer is made of flat chips having random fiber orientations in a vertical plane parallel to the long dimension of the beam. The chips are glued together under heat and pressure in a press, with the result that there is great coherence both between and within the layers. The pressing is done with the wider cross-sectional dimension of the beam horizontal, so that at this stage the layers of chips are side-by-side longitudinal stringers.
    Type: Grant
    Filed: March 27, 1974
    Date of Patent: September 5, 1978
    Assignee: Svenska Utvecklingaktiebolatget
    Inventor: Sven Gustav Casselbrant