Patent ID: 6066048
Filing Date: 2000-05-23
Classification: B21D,F16B,Y10S

Abstract:
A blade punch for forming teeth in a connector plate, said blade punch comprising:an elongate blade having a metal working tip at one end and a shank at the other end,said blade having an elongate cross-section defined by opposing sides and opposing ends, said sides comprising parallel spaced planar side walls, said ends each comprising a major end wall and a minor end wall converging to an end wall intersection, each said end wall intersecting a side wall at an obtuse angle, said end wall intersections being eccentric to a plane parallel to and midway between said side walls,said metal working tip having opposed air cut faces abutting one another along an air cut edge, said metal working tip having opposed first and second forming faces, each of said forming faces abutting one of said air cut faces along an exterior edge, each said air cut face bordered by edges between said air cut face and a portion of one of said minor end walls, a portion of one of said side walls, said air cut edge, and one of said exterior edges, each of said forming faces bordered by edges between said forming face and a portion of one of said major end walls, a portion of one of said minor end walls, a portion of one of said side walls, and by one of said exterior edges,wherein a first forming angle is formed between said first forming face and said exterior edge bordering said second forming face in a plane normal to said first forming face, wherein said forming angle is between about 40.degree. and 60.degree..