PURPOSE: To polish and reproduce only the tip part of a stylus easily by pressing a conical stylus base in a V groove for polishing and thus forming a projection part atop of the stylus base, and leaving an electrode with nearly constant width in the flank of the projected part.
CONSTITUTION: A conical base material body in a triangular pyramid, circular cone, etc., is used as a starting material and an electrode 5 is formed on its flank. Then, an abrasive disk having a V groove 6 consisting of two side walls 6-1 and 6-2 is rotated to rotate and stop said stylus base material 1 repeatedly within a prescribed angle range to an axis in its lengthwise direction, and its tip 8 is allowed to press-contact and leave the side walls 6-1 and 6-2 repeatedly at right angles to one side wall 6-1 of the groove 6 of the abrasive disk 7, thereby forming a columnar projection 8 or projection in the shape of a frustum of cone having the electrode nearly in the lengthwise direction atop of the reproducing stylus.
TOSHIDA SATORU
HIURA HIROMI
