| 摘要 |
A saw blade construction and method of forming such blade whereby the ends of a saw blade are abutted into end to end relationship to define an endless saw blade having a series of teeth formed along one edge to define a cutting edge, and having a back edge which is progressively sloped or tapered in opposite directions from an intermediate point on the back edge so that in a cutting operation the saw blade effects a cut along an edge portion of a workpiece on the down feed stroke of the blade and a progressive cut on the opposite edge of the workpiece whereby the teeth are rendered self-feeding on the progressive cut of the workpiece. In a modified embodiment the saw blade is formed with a plurality of alternately disposed down feed and progressive cutting edges. The respective saw blades when so formed have a tapered rear edge which has one or more step cams spaced along the rear length thereof, which results in an improved cutting action and sawing speed; particularly, for materials such as hard metals, like stainless steel, Inconal and the like.
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