Patent ID: 7363791

Claim:
A rotary stamping apparatus for forming moving sheet metal and comprising; a die assembly moveable forward and backward on opposite sides of the sheet metal, having upper and lower dies on respective sides of the sheet metal, the dies being closeable on the sheet metal for forming thereof; a rotary drive crank system coupled to the die assembly, and operable to move said die assembly forward and backward along said linear path, and being further operable to close said dies in said die assembly on said sheet metal; the die assembly being moveable in a linear direction along rails parallel to the sheet metal: bearings on driving the rotary crank, and a housing being carried on said bearings for rotating relative to said rotary crank; a speed adjustment mechanism in the form of arcuate drive ramps and followers therefor, on said die assembly connecting with said ramps and being operable for correcting slight mismatching between the line speed of the metal and the linear speed of the die assembly, during closing and opening of said dies.