Saber saw blade

For cutting a kerf in wood composed of fibers, a saber saw metal blade in the form of a longitudinally extending web having teeth extending generally in the plane of the web along one side thereof, with means on the web to secure the blade at one end to a reciprocating motor-driven saw so that the blade reciprocates longitudinally of the saw;

• the improvement comprising
• a tooth combination of
• (1) shear teeth for shearing fibers at the side of the kerf, and
• (2) cleaving teeth for partially cleaving fibers cut on one side of the kerf,
• wherein
• (1) a single cleaving tooth alternates with a single shear tooth;
• (2) the shear teeth have a set out of the plane of the web, with alternating shear teeth having opposite sets;
• and
• (3) the cleaving teeth lie in the plane of the web:
• whereby, when the saw blade reciprocates, a sawing action occurs wherein
• (1) a first shear tooth set to one side of the web first shears wood fibers at the side of the kerf of the set;
• (2) a cleaving tooth adjacent the first shear tooth partially cleaves the said first sheared fivers from the wood, the said cut fibers remaining intact at the side of the kerf opposite the cut made by the first shear tooth, and
• (3) a second shear tooth set opposite the first shear tooth shears the said partially cleaved fibers at the side of the kerf opposite the first shear;
• wherein the teeth are symmetrical, whereby the shearing and cleaving action set forth occurs in each direction of reciprocation.