Apparatus for cutting lumber to specified clear lengths

摘要: A piece of lumber is fed flat to the infeed end a marking station, tilted on edge and driven endwise into station where defects in are detected marked with retroreflective material. The moves defectcutting it past pair saws until defect sensed between stop movement actuate remove defective section. clear downstream measured and, if longer than minimum length range, diverted cut-to-length saw station. If within ''''core block'''' sort. shorter junk. upstream same manner as except that pieces range resume travel saws. Longlength sensors at determine contains any one several specified defect-free long lengths so, set corresponding longest then only cut such when reaches stop. Such directly sorting Random transferred pressed against series depressible stop-sensors determining various lengths, over released, reverse released strokes length, after which sorted according determined by stop-sensor.