APPARATUS FOR SHARPENING ROTARY CUTTERS FOR TOBACCO OR THE LIKE

摘要

The cutting edges of knives which are mounted on a rotary holder of a tobacco shredding machine are sharpened by the front surface or surfaces of one or more crown grinding wheels mounted on one or more carriages which are reciprocable in parallelism with the axis of the holder and dwell for selected intervals of time at the respective axial ends of the holder. The front surface of each grinding wheel is reconditioned by a discrete diamond which is pivotable about a fixed axis at the respective axial end of the holder. Each grinding wheel is fed axially toward the holder to compensate for wear and to maintain the respective front surface at a fixed distance from the axis of the holder. Each diamond can be set in motion in automatic response to completion of movement of the respective carriage toward the respective axial end of the holder.