Patent ID: 7380484

Claim:
An apparatus for continuously rotary punching an array of closely-spaced holes in a deformable strip comprising a cylindrical female die having a plurality of spaced recesses formed about its periphery and mounted for rotation in a frame, a cylindrical male/female die having a plurality of alternating spaced punches and recesses formed about its periphery and mounted for rotation in said frame for mating the punches of the male/female die with corresponding recesses in the female die, and a cylindrical male die having a plurality of spaced punches formed about its periphery mounted for rotation in said frame for mating of the punches of the male die with corresponding recesses in the male/female die, whereby interaction of the punches of the male/female die with corresponding recesses of the female die and interaction of the punches of the male die with the recesses of the male/female die index the strip with the female, male/female and male dies during rotation.