Patent ID: 7314404

Claim:
A burnishing head comprising: a body of material having a leading edge and a trailing edge; first and second rails extending from a surface of said body of material, said first and second rails comprising inner and outer walls, said outer wall of said first rail being at an angle with respect to a central axis of said burnishing head such that the portion of said outer wall of said first rail closest to the leading edge is closer to the central axis than the portion of said outer wall of said first rail closest to the trailing edge, said outer wall of said second rail being at an angle with respect to the central axis such that the portion of said outer wall of said second rail closest to the leading edge is closer to the central axis than the portion of said outer wall of said second rail closest to the trailing edge, wherein the height of the rails is greater than 30 μm, at least one wall of at least one rail forms an angle between 75 and 90° with respect to a plane of said surface of said body of material as measured from said plane, through said rail, to said wall, and the radius of curvature between said outer walls of said first and second rails and a burnishing surface of said first and second rails is less than 0.5 mils.