Woodworking – Process
Patent
1998-05-19
1999-01-26
Bray, W. Donald
Woodworking
Process
144356, 144364, 1441341, 144380, 358299, 372 20, 21912118, B27M 100, B23K 1500
Patent
active
058628452
ABSTRACT:
A method of processing lignocellulosic material comprises the steps of (a) generating a pulsed laser beam consisting of a train of laser pulses, each laser pulse having a duration less than 1.times.10.sup.-9 sec. and a peak intensity of at least 1.times.10.sup.11 w/cm.sup.2 ; and (b) directing the laser beam generated in step (a) onto a surface of the lignocellulosic material to cause ionization and fragmentation of macro-molecules thereof. The method of the invention enables one to cut, carve and/or sand the surface of lignocellulosic material without, burning same or damaging the cells of the lignocellulosic material.
REFERENCES:
patent: 5538056 (1996-07-01), Thoma
River, Bryan H. and Minutti, Victor P., Wood and Wood Products, vol. 80, No. 2, 1975 pp. 35, 36 and 38.
Jockerst, Ronald W. and Stewart, Harold A., Wood and Fiber, vol. 8 No. 2, 1976, pp. 107-113.
McMillin, C. W. et al., Forest Products Journal, 1984, vol. 34, No. 1, pp. 13-20.
McMillin, C. W. and Huber, H. A., Forest Products Journal, 1985, vol. 35, No. 1, pp. 23-25.
Hernandez, Roger E., Forest Products Journal, vol. 44, No. 7/8, 1994, pp. 63-66.
Chin See Leang
Lagace Simon
Naderi Nader
Bray W. Donald
Universite Laval
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