Patent ID: 6662615
Filing Date: 2003-12-16
Classification: B21D,F28F,Y10T

Abstract:
An improved air center form roll for use in combination with a like form roll to produce an accordion-like folded fin for a heat exchanger core, said form roll being of the type comprising a plurality of form discs abutted one to the other and having a plurality of star-like teeth thereabout, points of said star-like teeth defining a major diameter of said form roll and valleys between adjacent ones of said star-like teeth defining a minor diameter of said form roll, and further including at least one stripper disc having no teeth therearound and interposed between at least two of said plurality of form discs, wherein said stripper disc has a diameter less than said minor diameter of said form roll, the improvement comprising:a modified disc having a plurality of modified star-like teeth thereabout, said modified disc interposed at each abutment between said at least one stripper disc and one of said at least two form discs, said modified disc further having a major diameter defined by points of said modified star-like teeth, said major diameter of said modified disc being smaller than said major diameter of said plurality of form discs.