Marking station for timber

Details Marking station for timber Marking station for timber

1989-03-10

1990-06-19

Schran, Donald R.

Cutting

With means to monitor and control operation

Including means to correct the sensed operation

83 768, 83365, 83368, 83371, B27L 508

Patent

active

049342290

ABSTRACT:
A marking station for defect locations and quality limits in timber comprises a transporting device arranged to transport a timber in a movement direction through the marking station, a device for changing a transporting speed of the timber in the marking station, an indicating station part provided with a laser transmitting element and operative for indicating on the timber with a laser beam a first separating plane in the movement direction before a defect location and a second separating plane in the movement direction behind the defect location as well as for indicating quality limits, the laser transmitting element being movable by an operator along a guiding means parallel to the movement direction relative to the timber to indicating positions corresponding to the separating planes and the quality limits, a computer receiving the indicating positions of the laser transmitting element in the movement direction, the laser transmitting element being formed as a first mirror, a laser producing the laser beam being arranged stationarily and so that the laser beam extends parallel to the movement direction and impinges on the first mirror, the first mirror deviating the laser beam transversely to the movement direction in a plane as a laser fan, so that a first part of the laser fan directly impinges on a first side surface of the timber which faces toward the first mirror and also on an upper surface of the timber and indicates there the associated separating plane and quality limit.

REFERENCES:
patent: 3329181 (1967-07-01), Buss et al.
patent: 4239072 (1980-12-01), Merilainen
patent: 4286880 (1981-09-01), Young
patent: 4413662 (1983-11-01), Gregoire et al.
patent: 4700758 (1987-10-01), Bernath
patent: 4702134 (1987-10-01), Corley

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