Abstract: A method of forming elongated heat exchange fins from a continuous sheet of material having a width equal to a multiple of the width of a single fin and of collecting the fins in stacked relationship including the following steps: forming the sheet into longitudinally continuous adjacent fin strips with a width equal to the width of the fins, severing each fin strip into finite length fins with the ends in adjacent strips being longitudinally staggered and the ends in alternate strips being transversely aligned, progressing the finite length fins of alternate fin strips in a longitudinal direction, collecting the transversely aligned fins in the alternate fin strips moving the collected fins one fin width in the transverse direction, simultaneously progressing the finite fins of intermediate fin strips and stacking the finite fins of the intermediate fin strips over respective finite fins of the alternate fin strips on the respective finite fins of the alternate fin strips.