Patent ID: 7444911

Claim:
A slitter blade assembly for cutting off a workpiece, comprising: a drum-shaped rotary blade; and a disk-shaped rotary blade; said disk-shaped rotary blade having a cutting edge, a first beveled surface facing said drum-shaped rotary blade and progressively spaced from said drum-shaped rotary blade toward said cutting edge, and a second beveled surface facing the workpiece and progressively spaced from said cutting edge away from the workpiece, wherein a first distance (CL) of said first beveled surface up from said cutting edge along a severance plane perpendicular to a surface of the workpiece is set to a value which ranges from 40 μm to 200 μm and a first angle (q 6 ) of said first beveled surface from said severance plane is set to a value which ranges from 0.8° to 14°.