METHOD OF CUTTING ROUND TIMBER Russian patent published in 2014 - IPC B27B1/00 

FIELD: woodworking industry.

SUBSTANCE: after defining boundaries of separation of the central quality zone from the peripheral one, the longitudinal cutting of round timber is carried out, to obtain the two-edged cant covering all the timber of the central quality zone. Then the two-edged cant is cut to obtain the square cant comprising all the timber of the central quality zone and comprising a part of the timber of the peripheral quality zone. At the next stage, the square cant is cut lengthwise along the planes connecting the middles of its adjacent sides to obtain a preform of the square cross section entirely of the timber of the central quality zone and four preforms of the triangular cross-section, containing the timber both of the central and peripheral quality zones. After drying and additional mechanical treatment the preforms of the triangular cross section are inverted with respect to each other in the vertical plane by 90° and bonded to each other in a panel or pasted block so that the timber of the central quality zone is located inside, and the peripheral - outside.

EFFECT: increased the quality timber yield.

2 cl, 7 dwg