Wear-resistant laser-engraved metallic carbide surfaces for friction rolls for working elongate members, methods for producing same andmethods for working elongate members

Abstract From the Canadian patent

Friction rolls for working elongate members e.g. webs or strands, such as crimper rolls draw rolls, yarn, package drive rolls comprising a roll having a generally cylindrical external surface and a ceramic e.g. alumina, mixtures of alumina and titania chromia, zirconia, or metallic carbide e.g,. tungsten carbide, coating bonded to the external surface said coating, being laser-engraved, that is having a plurality of, laser-formed depressions having a pattern covering substantially the entire exterior working surface of the roll and providing uniform, wear-resistant surface texture over substantially said entire working surface.