Apparatus for cutting lumber to variable clear lengths

Cutting – With control means responsive to replaceable or selectable...

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83150, 83155, 83208, 83371, 83365, 83368, 83516, B27B 500

Patent

active

040856380

ABSTRACT:
Apparatus for cutting lumber to random or specified clear lengths by removal of sections containing defects and by making single end or intermediate cuts, includes infeed means for transporting a piece of lumber, locating means for locating the piece of lumber longitudinally in the apparatus, a fixed saw for cutting the piece of lumber at a first position, and a sliding saw selectively positionable longitudinally with respect to the fixed saw for cutting the piece of lumber at a second position which is located a spaced distance from the first position co-extensive with the extent of the defect. The fixed saw also is configured for operation independently of the sliding saw for making the single cuts.
Saw positioning means positions the sliding saw longitudinally, based on commands from a computer for removal of the defect with the minimum removal of clear lumber. Outfeed means which transports the clear piece of lumber out of the apparatus is tied to the sliding saw in a manner for translation therewith and is configured for transporting the piece of lumber at the same linear speed as the infeed means at all times including during the translation of the sliding saw.

REFERENCES:
patent: 3191857 (1965-06-01), Galey et al.
patent: 3322961 (1967-05-01), Harrison et al.
patent: 3329181 (1967-07-01), Buss et al.
patent: 3415149 (1968-12-01), Ziljberman et al.
patent: 3556368 (1971-01-01), Rene
patent: 3811353 (1974-05-01), Miles
patent: 3871258 (1975-03-01), Hurn
patent: 3885483 (1975-05-01), Ikeya et al.

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