Laminate Bevel Trimmer: Two Pads at Right Angles Hold a Small Router at 45 Degrees on a Corner (Roche, 1971)

Edward Noland Roche of Cockeysville, Maryland, received US 3,628,579, dated 21 December 1971, for a small router that bevels plastic laminate in place. Laminate is usually trimmed after it is glued down, and a mitred corner meant mitring the wood underneath too. Roche's tool rides on the corner of the already-built carcass. A fixed pad with a 45 degree face sits on the top surface, a tilting pad sits on the side face, and the cutter between them bevels the laminate's edge inwards, exactly to the edge beneath it. The guide base swings slightly on a pivot to line the pad up with the cutter. We print the motor unit, base and pads in PETG round a small DC motor. The 45 degrees is his; the other sizes are ours.