Method and apparatus for the separation of tree logs into...

B - Operations – Transporting – 27 – B

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144/49

B27B 1/00 (2006.01) B27B 31/04 (2006.01) B27M 1/08 (2006.01)

Patent

CA 1112548

ABSTRACT OF THE DISCLOSURE Process and apparatus for the separation of logs into lumber sections suitable for general processing. Flat faces are cut on four sides of the logs. The log edges are milled out rectangularly and lateral planks are sawn off from at least two opposite sides. The following sequence of operational steps takes place: Two opposite sides of the tree log are cut to produce flat faces. The log is turned 90° about its longitudinal axis. The two opposite sides of the log are cut to produce flat faces. The four log edges are partially milled out. Each of the lateral planks, located between an upper and a lower milled-out edge of the tree log, is cut off by at least one vertical saw cut. The log is turned 90° about its longitudinal axis. The four residual edges are completely milled out. Each of the lateral planks located between an upper and a lower milled-out edge of the tree log, is cut off by at least one saw cut. The apparatus has a conveyor mechanism for the transportation of the tree log. A turning device is mounted on a supporting structure. The turning device features two gripping arms that can be pressed against two opposite faces of the tree log. The gripping arms pivot on a frame mounted on a support structure so it can rotate about the longitudinal axis of the free log.

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