Abstract: A flat reducing and sawing installation for processing tapering logs includes a reducing section and a sawing section through which logs pass in sequence. The reducing section includes two reducing disks which can each be moved outwards by respective positioning devices. The sawing section includes at least two laterally movable saw blades. The position of the reducing disks is controlled by an electronic evaluation and control unit on the basis of profile data fed in about the log, which indicates that at least one of the disks is about to grind sufficient material from one side of the log to form a plank of a minimum acceptable thickness, length and width. Under these circumstances, the control unit moves the appropriate reducing disk outwardly by at least the minimum acceptable thickness to allow the outermost saw of the sawing section to saw off the resulting plank.

Abstract: A log turning apparatus comprising at least two rotary driven rollers on opposite sides of the path of the logs. The rollers are carried on the ends of two arms which are supported for pivoting about a vertical axis, and the rollers are biased in direction towards each other to bear against a log between them and to advance the log lengthwise as the rollers rotate. The rollers are adjustable to impart a turning motion to the log around its axis simultaneously with the advancement of the log. The adjustment of the rollers takes place by synchronously inclining the rollers in mutually opposite directions around an axis perpendicular to the feed path of the logs.