Patent ID: 7810532

Claim:
A system of router bits for constructing tambour slats, comprising: a first router bit, said first router bit having a cutting portion including a concave ‘S’ shaped ogee and a convex semi-spherical nose portion with a first curvature radius proximate to a distal end of said first router bit; and a second router bit having a first cutting profile proximate to a distal end of said second router bit with a concave ‘S’ shaped ogee with at least one curvature radius comparable to the first curvature radius and a second cutting profile, separated from the first cutting profile by a substantially straight surface, the second cutting profile having a concave quarter round, the first cutting profile and second cutting profile being sized and shaped such that when the second router bit is applied to opposing surfaces of a strip of material a tongue and neck portion is formed that can be rotatably engaged and retained in a groove formed by the first router bit in at least one edge surface of said strip of material.