Patent ID: 6837087
Filing Date: 2005-01-04
Classification: B21D,Y10T

Abstract:
1. A metallic sheet comprising a flattened body bounded by an edge and conditioned to be positioned on and subsequently shaped by a forming die into a part of predetermined shape, said die having a sheet guide and positioning pin extending outwardly therefrom, said sheet having a sheet positioning slot arrangement formed therein operative for reception of the sheet guide and positioning pin, said slot arrangement comprising a primary channel having opposing side walls spaced from one another defining a width sufficient to receive and guide on said pin, said primary channel extending through said edge and terminating at an end wall intersecting said side walls, at least one branch slot extending at an angle from the end of said primary channel to a terminal end, a boundary slot in said sheet spaced at a predetermined distance to one side of said primary channel, said boundary slot extending through said edge to a predetermined terminus adjacent to said terminal end of said branch slot and cooperating therewith to define a hinge in said body of said sheet, said primary channel and said branch cooperating with said boundary slot and said hinge to define an expendable waste portion of said formed part, said expendable waste portion being adapted to be turned with respect to said hinge by forces ejecting said formed part from said forming die to effectively enlarge said primary channel to prevent the formed part from being retained by said pin so that said part can be removed from said pin and said forming die without further deformation of said part.