Patent ID: 7066066

Claim:
A method of continuously punching an array of closely-spaced holes in a deformable strip in a rotary punch which comprises feeding said deformable strip between a female rotary die having a cylindrical periphery with a plurality of spaced recesses formed on the cylindrical periphery and a male/female rotary die having a cylindrical periphery with a plurality of alternating spaced punches and recesses formed on the cylindrical periphery for mating of said punches of the male/female rotary die with corresponding said recesses of the female die, rotating said female and male/female dies concurrently for punching a first set of spaced holes in the deformable strip along the deformable strip, feeding said punched deformable strip between said male/female rotary die and a male rotary die having a cylindrical periphery with a plurality of spaced punches formed on the cylindrical perimeter for mating of said punches of the male rotary die with corresponding said recesses of the male/female rotary die, and rotating said male/female die concurrently with the male die for punching a second set of holes in the strip between the first set of spaced holes along the deformable strip.