Method for sawing a log or a block into pieces of lumber
AssigneeTrateknik Centrum
InventorPer M. Wiklund
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Abstract
The present invention relates to a process for sawing a log or a block into pieces of lumber, such as blocks, planks, boards, etc. The method is characterized in that pieces of lumber are sawn out with longitudinal cut surfaces such that--when the log is viewed in cross section--the lateral surface of the piece of lumber facing the center of the log is substantially concave while its lateral surface facing away from the center of the log is substantially convex, the concavity and convexity being adapted to the local tangential and radial shrinkage properties of the wood so that the sawn pieces, after drying to the desired moisture ratio, will have substantially plane-parallel sides.
Claims8
Method for sawing a log into pieces of lumber, comprising sawing a log lengthwise to produce pieces of lumber having longitudinal cut surfaces, such that, in a cross section of the log, the lateral surface of each of said pieces of lumber facing the center of the log is substantially concave and the lateral surface of each of said pieces facing away from the center of the log is substantially convex, and adapting the degree of concavity and convexity to the local tangential and radial shrinkage properties of the wood so that, after drying said sawn out pieces of lumber to the desired moisture ratio, said cut surfaces of said pieces are substantially planar and parallel.
Dependencies are inferred from the claim text.