Patent ID: 7867429

Claim:
A method for using a bending device to bend a synthetic material board filled with more than 20% alumina trihydrate in a methyl methacrylate matrix, the bending device comprising systems for clamping the board so that an upper surface of the board is held firmly so as to prevent elongation of the upper surface of the board during bending, the systems for clamping the board comprising a flexible guide and at least one pair of jaws to clamp the board along the length of an edge of the section to bend, an upper one of the jaws comprising a bearing surface intended to apply against the board, the method comprising the steps of: heating a section of the board that is to be bent; and bending the section of the board to be bent so as to allow the board to creep into space between the flexible guide and the upper surface of the board and create a boss on the board along the length of the upper jaw, wherein the upper jaw comprises the bearing surface intended to apply against the board, and the flexible guide is offset from the bearing surface so as to allow the boss to be created along the length of the upper jaw during the bending step.