Method for producing improved cutting edges

A method for forming cutting edges comprising:

• providing a grinding stage including a pair of abrading wheels that extend from a strip receiving end to a strip exiting end, wherein the pair of abrading wheels each comprise an abrasive surface that varies from a fine abrasion to a coarse abrasion in a direction from the strip receiving end to the strip exiting end;
• and
• removing, with the abrasive surface of the pair of abrading wheels, material from a strip of metal incident on the strip receiving end along a path P, comprising;
• removing material, from a tip of the strip of metal, with the abrasive surface having the fine abrasion, and
• removing material, along a distance from the tip of the strip of metal, with the abrasive surface having the coarse abrasion.

A method for forming cutting edges comprising:

• directing a strip of metal along a path P;
• removing, with a first grinding stage including a pair of abrading wheels, material from the strip of metal incident on the first grinding stage along the path P to form a first profile;
• removing, with a second grinding stage including a pair of abrading wheels that extend from a strip receiving end to a strip exiting end, material from the first profile of the strip of material incident on the strip receiving end of the second grinding stage to form a second profile, including;
• removing, with a fine abrasive surface of the pair of abrading wheels adjacent the strip receiving end, material from a tip of the first profile of the strip of metal to form a tip of the second profile;
• and
• removing, with a coarse abrasive surface of the pair of abrading wheels adjacent the strip exiting end, material along a distance from the tip of the second profile of the strip of metal such that the removed material is directed away from the tip of the second profile.