Method of making form dressing tool

Claim 1

THE METHOD OF MAKING A FORM DRESSING TOOL FOR DRESSING GRINDING WHEELS WHICH COMPRISES GRINDING A RELATIVELY RIGID BLADE TO PROVIDE A SURFACE THEREON HAVING A CONTOUR THE REVERSE OF THAT TO BE REPRODUCED ON A GRINDING WHEEL, CUTTING WITH SAID BLADE A BLOCK OF MATERIAL SUITABLE FOR USE AS A MOLD TO PROVIDE ON SAID BLOCK A MOLDING SURFACE HAVING A CONTOUR THE REVERSE OF THAT OF SAID BLADE, APPLYING TO SAID MOLDING SURFACE A LAYER OF ABRASIVE PARTICLES ADMIXED WITH A BINDER THEREFOR, BACKING SAID LAYER WITH A MASS OF METALLIC PARTICLES AND MOLDING SAID MASS AND LAYER TOGETHER UNDER HEAT AND PRESSURE AGAINST SAID MOLDING SURFACE TO FORM AN ABRASIVE FORM DRESSING TOOL HAVING A CONTOUR THE REVERSE OF SAID MOLDING SURFACE AND THE REVERSE OF THAT TO BE REPRODUCED ON A GRINDING WHEEL.