Patent ID: 6026872
Filing Date: 2000-02-22
Classification: B27L

Abstract:
A method of treating a log, the method comprising the steps of sequentially:passing the log longitudinally parallel to its grain between a first pair of coarse chippers;at each of the coarse chippers displacing a succession of cutting edges crosswise across the log with each cutting edge extending generally parallel to the log's grain while in contact with the log and thereby cutting material from opposite faces of the log as coarse long-grain chips and producing a pair of flat sides;passing the log between a first pair of fine chippers;at each of the fine chippers displacing a succession of cutting edges crosswise across the log with each fine-chipper cutting edge extending generally parallel to the log's grain while in contact with the log and thereby cutting material from the flat sides as fine long-grain chips;rotating the log through about 90.degree.;passing the rotated log between a second pair of coarse chippers;at each of the coarse chippers of the second pair displacing a succession of cutting edges crosswise across the log with each fine-chipper cutting edge extending generally parallel to the log's grain while in contact with the log and thereby cutting material from opposite faces of the log between the flat sides as coarse long-grain chips and producing two more flat sides; andpassing the log between a second pair of fine chippers and;at each of the fine chippers of the second pair displacing a succession of cutting edges crosswise across the log with each fine-chipper cutting edae extending generally parallel to the log's grain while in contact with the log thereby cutting material from the two more flat sides as fine long-grain chips.