Machine for grading plastic articles, has two parallel rotating rollers mounted so their height, inclination and separation are adjustable and rollers have helical pattern for displacing oversize articles

摘要

A grading machine has a slot defined between two parallel rotating rollers. The rollers are mounted on cradles so the space between the rollers is adjustable. The cradles are mounted on a chassis so their height, inclination is adjustable. The rollers have a helical pattern for displacing articles too large to pass through the slot. The chassis may have bars with button for locking them at different inclinations. The chassis is attached to a movable platform so that is height can be adjusted. The chassis has cross arms extending between the bars and the cradles slide on the cross arms.