Patent ID: 6161603
Filing Date: 2000-12-19
Classification: B27B,B27L

Abstract:
A method for working a curved tree trunk into timber products, comprising the following steps performed in the following order:measuring the geometry of the trunk;based on the geometry establishing a working axis of the trunk as a function of distances from a selected surface of the trunk, an optimal position of a center axis of at least one side board relative to the working axis, and an optimal width of the at least one side board;feeding the trunk along a working machine while supporting the trunk on the selected surface such that the working axis passes between a first pair of working cutting heads and a second pair of working cutting heads and such that a tangent to the working axis is parallel to a center line of the working machine at a given point on the machine;trimming the trunk with the first pair of working cutting heads and the second pair of working cutting heads so as to form opposite side surfaces and top and bottom surfaces; andsawing the trunk with at least one sawing element and chipping the trunk with a pair of chipping heads of an edging unit so as to sever the at least one side board from a balk of the trunk and edge the at least one side board, the chipping heads being adjusted to a selected width of the at least one side board and the edging unit being moved according to the optimal center axis of the at least one side board.