A diamond abrading disc having a discontinuous pattern, and a method for making such a disc, distributing a layer of diamond particles over an abrading surface in a disc body having interspersed conductive metal zones and resist zones, and initially bonding the diamond particles to the metal zone by...http://www.google.se/patents/US4078906?utm_source=gb-gplus-sharePatent US4078906 - Method for making an abrading tool with discontinuous diamond abrading surfaces
