Automatic lumber sorting

Details Automatic lumber sorting Automatic lumber sorting

B - Operations, Transporting

07

C

B07C 5/34 (2006.01) B07C 5/14 (2006.01) B07C 5/342 (2006.01) G01N 21/84 (2006.01) G01N 21/898 (2006.01) G01N 33/46 (2006.01)

Patent

CA 2270274

To facilitate separation of lumber pieces that are of different species, an indicator liquid is sprayed on to a fresh cut end of each lumber piece to produce a characteristic reaction, e.g. based upon pH. After a suitable interval the coated ends of the lumber pieces are optically scanned, the scanned image being analysed spectrographically to identify the species of the lumber piece, e.g. as between spruce and fir. The lumber pieces are separated accordingly so that further processing thereof, e.g. kiln drying can be done under optimal conditions for that species.

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