Woodworking – Special-work machine
Patent
1988-08-08
1989-07-25
Bray, W. Donald
Woodworking
Special-work machine
291216, 100121, 144362, B27M 102, B27M 300
Patent
active
048504041
ABSTRACT:
A device is disclosed which is adapted to tenderize wood veneer sheet by feeding such sheet into the nip between a pair of rotating rolls at least one of which rolls has on the periphery thereof a number of projections arranged to incise the sheet for forming therein checks along the direction of grain orientation of the wood veneer sheet. Each projection on the roll has a pointed distal tip end and a proximal broad base, and at least the portion of the projection adjacent the distal tip end thereof is of a pyramidal shape having a vertex corresponding to said distal tip end and N sides, wherein N stands for an even number of more than two, with said sides intersecting to define edges of said pyramidal shape between any two adjoining such sides. The pyramidal shape for the projection includes a pair of opposite edges extending in opposite directions from said vertex and so oriented that a phantom plane containing such opposite edges is parallel to a straight phantom line drawn on the peripheral surface of said one roll in parallel to the axis thereof.
REFERENCES:
patent: 4137956 (1979-02-01), Toberg
patent: 4219060 (1980-08-01), Hasegawa
patent: 4318433 (1982-03-01), Amundsen
patent: 4655869 (1987-04-01), Tellman et al.
patent: 4718338 (1988-01-01), Koba
patent: 4796680 (1989-01-01), Koda
Bray W. Donald
Meinan Machinery Works Inc.
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