Grading rolls for agricultural, horticultural and other articles

Details Grading rolls for agricultural, horticultural and other articles Grading rolls for agricultural, horticultural and other articles

1989-03-10

1990-09-04

Hajec, Donald T.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Separating means

198663, 198676, 209673, B07B 1304

Patent

active

049537121

ABSTRACT:
A grading roll is provided having parallel and circumferentially closed sinuous grooves on the roll surface. The grooves are spaced axially along the longitudinal cross-sectional direction of each groove varies twice in angle with the roll axis, i.e., from 90 degrees to a certain value smaller than 90 degrees and back to 90 degrees. The bottoms of the grooves are at a constant radial distance from the roll axis, while the cylinder surface portions between the grooves decrease in radial distance from the roll axis from a minimum at the 90 degree angle portion of the grooves to a minimum between these portions.

REFERENCES:
patent: 530261 (1894-12-01), Distl et al.
patent: 1461265 (1923-07-01), Bullard
patent: 1766340 (1930-06-01), Kendall
patent: 1882130 (1932-10-01), Fielder

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