Shot Peening

Author:  Phillip M. Winter, Gary A. Gardner
Source:  US Patent 3,857,750
Doc ID:  1973053
Year of Publication:  1973
Abstract:  
A rotary wheel, in which spheroidal peening particles are affixed to radially extending circumferentially spaced flaps of fibrous sheet material, is used to impart compressive stress to, or aid in shaping, metallic substrates.