B - Operations – Transporting – 27 – M
Patent
B - Operations, Transporting
27
M
B27M 3/00 (2006.01) B27B 1/00 (2006.01) B27G 1/00 (2006.01) B27M 1/08 (2006.01) B32B 21/13 (2006.01)
Patent
CA 2130137
Laminated lumber 20 made of a plurality of prismatic wood 11 to 15 arranged in the transverse direction and bonded together by an adhesive, in which inside knots 16 to 19 are present in the transverse of at least a part of inside pieces of the prismatic wood composing the laminated lumber, and knots are not present at least on the surface of the laminated lumber. As a result, it is possible to obtain high-class laminated lumber without knots on three or four sides by using natural wood with knots with a high product yield. In the method of making the laminated lumber, a plurality of prismatic wood 11 to 15 are arranged in the transverse direction, outside pieces of the prismatic wood 11 and 15 have no knots, inside pieces of the prismatic wood 12 to 14 which have inside knots 16 to 19 lengthwise are rotated such that the knots 16 to 19 of the inside pieces of the prismatic wood 12 to 14 are present in the transverse direction. By arranging the prismatic wood in this way, there is substantially no knots on the four sides of the laminated lumber. An adhesive is applied between the prismatic wood in this condition, and the prismatic wood is bonded together by pressurization, and the surface is smoothed in due course.
Hashiguchi Tetsuya
Smart & Biggar
LandOfFree
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