Patent ID: 6523239
Filing Date: 2003-02-25
Classification: B65H,Y10T

Abstract:
A die for pressing a sheet metal flange sub assembly on to a cylindrical barrel to form a spool, the flange sub assembly made up of an inner flange hub and an outer flange joined by a loose curl having an exposed curled surface on one side of the flange sub assembly and a circular curl entrance on the other side of the flange sub assembly, the barrel having a circular metal edge received into the curl entrance, the die comprising:a support housing; a curling member carried by the support housing and movable with respect thereto, having an annular curling face aligning in substantial diametric opposition with the loose curl, the curling member including a plurality of slots extending through the curling face; a plurality of nibs carried by the support housing, arranged in the slots of the curling member; a spring interposed between the curling member and the support housing, biasing the curling member away from the support housing, the die having a first pressing stage wherein the curling member presses the flange sub assembly onto the cylindrical barrel with the curling face curling the metal edge of the cylindrical barrel radially outward into the curl to secure the flange sub assembly to the cylindrical barrel, and a second pressing stage wherein the curling member moves towards the support housing exposing the nibs, the nibs projecting into the curl to form a plurality of corresponding detents in the curl.