Patents Assigned to Trus Joist MacMillan
  • Patent number: 6012262
    Abstract: An I-beam for use in construction, built-up from a web held between a pair of laminated flanges. Each flange includes a first laminate made of oriented strand lumber and a second laminate laminated to the first laminate. The web is between the first laminates.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: January 11, 2000
    Assignee: Trus Joist MacMillan
    Inventor: David C. Irving
  • Patent number: 5421951
    Abstract: A continuous press for pressing glued press charges is provided. The press includes first and second generally parallel press platens, a driver for driving the press platens through a working stretch at a predetermined rate of travel, and a system for maintaining a predetermined spacing between the press platens to compress and unify the press charges disposed between the first and second press platens. The system is designed to travel through the working stretch of the press, with the press platens, at the predetermined rate of travel.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: June 6, 1995
    Assignee: Trus Joist MacMillan
    Inventors: Arthur L. Troutner, Kevin B. O'Sullivan, Dean G. Pritchard
  • Patent number: 5325954
    Abstract: A strand preorienter is formed by a plurality of spaced parallel preorienter shafts each having a plurality of preorienter discs mounted thereon in axially spaced relationship. The preorienter discs on adjacent shafts overlap and form preorienter partition walls which defined opposite sides of preorienter passages through which the strands fall onto an orienter having orienter passages that align the strands as required. The preorienter passages are significantly wider than the orienter passages and have their outlets positioned immediately above the orienter.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: July 5, 1994
    Assignee: Trus Joist MacMillan
    Inventors: Bradley J. Crittenden, Derek Barnes, Robert M. Knudson, Frank L. Laytner
  • Patent number: 5217665
    Abstract: The present invention relates to a method of producing a waferboard by applying first a liquid phenol formaldehyde resin to the surface of the wafers then a powdered phenol formaldehyde resin followed by forming a layup and pressing at elevated temperature and pressure using steam pressing techniques to consolidate the layup into a board and set the phenol formaldehyde adhesive.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: June 8, 1993
    Assignees: Borden Inc., Trus Joist MacMillan
    Inventors: Jau T. C. Lim, Shui-Tung Chiu