Patent ID: 7137316
Filing Date: 2006-11-21
Classification: B23D,Y10T

Abstract:
1. A method of making a saw blade blank in which at least one aperture is formed in a strip of relatively soft material and a non-circular insert of relatively hard material is fixed in the aperture, the insert causing material of the blank to be displaced as the insert is introduced, and material being removable from the edge of the blank to form a saw blade with a tooth, leaving at least part of the insert exposed to form a cutting portion of the tooth, in which the insert comprises a main body from which a plurality of projections extend, the projections serving to displace material of the strip when the insert is introduced, and thereafter to remain embedded within the material of the strip, and in which the projections each have a convex extremity and are separated from neighbouring projections by a concave portion of the outline of an insert.