D - Textiles – Paper – 21 – B
Patent
D - Textiles, Paper
21
B
D21B 1/02 (2006.01) B27L 11/00 (2006.01) B27L 11/02 (2006.01) D21B 1/00 (2006.01)
Patent
CA 2129865
ABSTRACT A wood chip cracking apparatus employs oppositely rotating rolls which have surfaces of matrices of pyramid-shaped projections. The pyramids are aligned circumferentially so that the gaps between circumferential rows of pyramids form continuous V-shaped groves which encircle the rolls. To clean the surface of the rolls and prevent the build-up of wood chips or other material therebetween, a scraper is employed. The scraper consists of a backing plate mounted rigidly with respect to the frame on which the rolls are mounted and a replaceable, segmented blade constructed of one-quarter inch stainless steel with high wear-resistance properties. The edge of the blade has triangular teethwhich fit between the rows of pyramids on the surface of the rolls. The teeth ofthe blade are spaced one to two millimeters from the sides of the pyramids which form the surface of the rolls. The teeth prevent the build-up of material between pyramid-shaped projections.
Beloit Technologies Inc.
Ridout & Maybee Llp
LandOfFree
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