Patent ID: 8104320

Claim:
An apparatus for bending sheet metal, comprising: a housing; a first shaft mounted in the housing; a second shaft mounted in the housing in a position parallel to the first shaft; a first gear mounted on the first shaft, wherein the first gear comprises a first hub and a first plurality of teeth on the first hub; a second gear mounted on the second shaft, wherein the second gear comprises a second hub and a second plurality of teeth on the second hub; and a motor, wherein the motor is configured to rotate both the first gear and the second gear, wherein the first gear and the second gear are configured to engage the sheet metal passed between the first gear and the second gear while the first gear and the second gear are moving, wherein the first plurality of teeth are configured to be adjusted in a radial direction on the first hub to change a diameter of the first gear and the second plurality of teeth are configured to be adjusted in a radial direction on the second hub to change a diameter of the second gear to change a wavelength of waves formed in the sheet metal engaged by the first gear and the second gear without changing the first hub and the second hub, and wherein a distance between the first shaft and the second shaft can be adjusted to change an amplitude of the waves formed in the sheet metal engaged by the first gear and the second gear.