Patent ID: 7210511

Claim:
Method for producing oriented strand (OS) chips for the manufacture of OS boards, the method comprising: producing an intermediate product from fresh wood or recycled wood, the intermediate product being substantially rod-shaped; feeding the intermediate product into a chipping machine that has a large number of blades, the blades being arranged on a blade ring, the blades having cutting edges running at least approximately parallel to a ring axis and enclosing a working chamber; rotating the intermediate product around the blade ring axis, the intermediate product being aligned to lie in such a way that it lies essentially parallel to the blade ring axis and is pressed by centrifugal force against cutting edges of the blades, the intermediate product having a length of 80 millimeters to 150 millimeters and a width of in an order of at least 20 millimeters, the blades having a blade angle that produces OS chips with a thickness of 0.2 millimeters to 0.6 millimeters; sifting the intermediate product upstream of the feeding to only allow through a portion of the intermediate product having specific dimensions; and classifying the OS chips according to design, dimensions, or weight.