Laminated lumber and method of manufacturing the same

Details Laminated lumber and method of manufacturing the same Laminated lumber and method of manufacturing the same

1994-08-16

1997-01-14

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156264, 144345, 144346, B32B 3100

Patent

active

055935303

ABSTRACT:
Laminated lumber made of a plurality of prismatic wood arranged in the transverse direction and bonded together by an adhesive, in which inside knots 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 are arranged in the transverse direction, outside pieces of the prismatic wood have no knots, inside pieces of the prismatic wood which have inside knots lengthwise are rotated such that the knots of the inside pieces of the prismatic wood 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.

REFERENCES:
patent: 3580760 (1971-05-01), Koch
patent: 5002105 (1991-03-01), Bodig
patent: 5034259 (1991-07-01), Barker
patent: 5135597 (1992-08-01), Barker
patent: 5147486 (1992-09-01), Hoffman
patent: 5240050 (1993-08-01), Shing

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