Patent ID: 6123608
Filing Date: 2000-09-26
Classification: B24B,Y10T

Abstract:
A crown forming apparatus comprising:a lapping surface plate having a concave processing surface;a jig having a convex surface; anda drive means for moving said jig relative to the processing surface while causing the convex surface of said jig to be confronted with the processing surface of said lapping surface plate,wherein the radius of curvature R.sub.1 of the convex surface of said jig and the radius of curvature R.sub.2 of the processing surface of said lapping surface plate are set to R.sub.1 .gtoreq.R.sub.2 ; andan approximately rectangular-prism-shaped bar, which has magnetic head elements of not less than 1 disposed on a side wall thereof in a row, is bonded to the convex surface of said jig through an elastic sheet while being deformed to an arc shape along a longitudinal direction thereof with a surface to be processed thereof facing to said lapping surface plate, and the surface to be processed of the bar is abutted against the processing surface.