Method And Apparatus For Producing A Decorative Effect On Stainless Steel And Other Surface

Author:  Duncan, L. L.
Source:  US Patent 3,545,996
Doc ID:  1970009
Year of Publication:  1970
Abstract:  
A method of peening a metallic surface with microscopic glass beads in a partial vacuum wherein the beads are removed from the surface undergoing peening by introducing an air stream on one side of the surface and exhausting it on the other side together with the spent beads and debris. Placing a plurality of units to carry out the foregoing method on a crankshaft and rotating same on the metallic surface which is moving relative to the crankshaft. Spacing a stencil above the metallic surface, peening the surface through the stencil while at the same time removing spent peening material and debris by means of an air stream flowing between the metallic surface and the stencil. Plating the surface either before or after peening same with microscopic glass beads whereby part of the plating may be removed. Introducing embedding materials with the peening materials so that the embedding materials are peened into the surface being treated.