Sharpenable cutting blade with skew-cut notches for use in sheet material cutting apparatus

摘要

A sharpenable cutting blade with a series of alternately inclined skew-cut notches along its main cutting edge. Each notch defines a pair of auxiliary cutting edges respectively on opposite sides of the main cutting edge and facing in opposite longitudinal directions. Each auxiliary edge resides in and is half-defined by a main edge defining surface so as to be sharpened simultaneously with the main edge.