METHOD OF MANUFACTURING SQUARE EDGED TIMBER FROM SAWLOGS Russian patent published in 2014 - IPC B27B1/00 

FIELD: woodworking industry.

SUBSTANCE: from the sawlogs the dull-edged timber and two uncut segments are obtained. Then the dull-edged timber is sawn into edged boards and three-side cut segments, which after drying are symmetrically divided longitudinally into two equal parts, whereby obtaining the lateral three-side preforms. Then the uncut face of lateral three-side preforms is milled, obtaining the processed preforms having a cross section in the form of rectangular trapezoids, which are then glued together in pairs with each other on an inclined faces with the turn of one of the preforms on the length and width by 180 degrees. From uncut segments the three-side half-beam is made, which broad side coincides with the base of this segment, and is equal to the thickness (H) of the dull-edged timber, made from the log, as well as lateral three-side boards (T1) and two-side rails (b). The three-side half-beam is sawn into edged boards and three-side cut segments, which coincide in shape and size with three-side cut segment, obtained by cutting dull-edged timber, and are processed with the same method as three-side cut segments, obtained by cutting the dull-edged timber.

EFFECT: increased yield of square edged timber from sawlogs, simplifying of manufacturing process of timber.

2 cl, 18 dwg