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US 7,066,066 B2Granted
Continuous rotary hole punching method and apparatus
AssigneeTeck Cominco Metals Ltd.
InventorsJohn V. Marlow, Omer E. Kilic, Nimrod I. Major
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AssigneeTeck Cominco Metals Ltd.
InventorsJohn V. Marlow, Omer E. Kilic, Nimrod I. Major
Estimating the term…
A method and apparatus for continuous, high-speed production of punched strip having an array of high-tolerance closely-spaced holes with positive ejection of waste punch-out material. A first pair of opposed rotary dies, one a female die and the other a male/female die, punches a first set of holes in a strip fed continuously between the dies, and a second pair of opposed rotary dies, one the male/female die and the other a male die, punches a second set of holes in the strip between the first set of holes, the strip being wrapped about the common male/female die during punching of the first and second sets of holes to continuously index the strip with the two opposed pairs of rotary dies to ensure production of the high-tolerance closely-spaced holes. A plurality of angular segments mounted in an annulus formed in proximity to the perimeter of the dies adapted for controlled radial travel of the angular segments during rotation of the dies, each angular segment having at least one ejector pin for radial reciprocal travel in a die recess, ejects punch-out material from the recess.
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.
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;
Dependencies are inferred from the claim text.