Patent ID: 6205641
Filing Date: 2001-03-27
Classification: B23P,H05K,Y10T

Abstract:
An anvil for a press for assembling a fastener to a plate, the plate having a top surface and a bottom surface, the plate further having an aperture having a diameter, the press including a ram assembly for pressing the fastener into the plate aperture, the ram assembly being disposed above the anvil, the plate being disposed between the ram assembly and the anvil, such that the plate top surface is disposed adjacent the ram assembly, and the plate aperture being in alignment with the anvil, the anvil comprising:a housing;a pin disposed within said housing, said pin having a top surface, said top surface having an area, said pin being slidable between an extended position, partially extending outwardly of said housing and adapted to extend through the plate aperture, and a retracted position wherein said pin is disposed within said housing, such that said pin top surface is disposed below the bottom surface of the plate; anda collar disposed in said housing and concentrically disposed around said pin, said collar including a plurality of spaced apart collar sections, each collar section having a bottom flange retained by said housing and a top flange, each top flange having a top surface, said top surface thereof having an area, said top flanges forming an adjustable aperture having a first diameter and a second diameter through which said pin slides, said collar sections being movable between an expanded position when said pin is in said extended position and said collar aperture has said first diameter and a collapsed position when said pin is in said retracted position and said collar aperture has said second diameter, said second diameter being less than said first diameter, such that said collar sections top flanges are disposed adjacent said pin top surface in said pin retracted position to form a barrier below the plate aperture, said barrier including said area of said pin top surface and said area of said top surface of said top flanges, and wherein said collar aperture second diameter is less than the diameter of the plate aperture.