Patent ID: 8206201

Claim:
A method for producing a surface roughing, polishing, and smoothing brush for stone material, comprising the following steps: a first injection molding of a core mixture including at least one moldable synthetic material in a mold, to obtain a base portion of a brush and a plurality of dummy bristles absent abrasive materials projecting from at least one surface of said base portion, said dummy bristles being tapered from their base end to their tip end; a second injection molding over the entire surface of said dummy bristles and all surfaces connecting, between, and contiguous with said dummy bristles, an abrasive coating layer material comprising a thermoplastic resin and a granular abrasive material, forming a plurality of finished bristle members which are tapered from their base end to their tip end, said finished bristle members comprising said dummy bristles as a core, and an abrasive molded on coating layer.