Method and device for manufacturing mechanical pulp
AssigneeSunds Defibrator AB
InventorHjalmar S. I. Bystedt
Life of this patent
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Abstract
A method and a device for the manufacture of mechanical pulp from lignocellulosic material by forcing the said material into contact with a grinding disc (1) which revolves about a central axle (2) perpendicular to the two end faces of the disc.. The material is supplied in bulk, particulate form, preferably as wood chips, a large number of particles simultaneously being retained, compressed and, in the presence of water, forced into contact with one or more grinding areas (5) on one or both end faces of the grinding disc. The disc is enclosed in a sealed, pressurized housing (6).
Claims8
Method for manufacturing mechanical pulp from lignocellulosic material by forcing the said material into contact with opposite end faces of a single grinding disc (1) which revolves about a central axle (2) perpendicular to said two opposite end faces of the disc, which method is characterized in that the material is separately fed in bulk, particulate form to each face, a large number of particles of the said material simultaneously being retained against, compressed and, in the presence of water, forced directly into contact with one or more grinding areas (5) located on each of said opposite end faces of said single grinding disc, the disc being enclosed in a sealed, pressurized housing (6).
Dependencies are inferred from the claim text.