Shot Peening

Author:  Phillip M. Winter, Gary A. Gardner
Source:  US Patent 3,638,464
Doc ID:  1968047
Year of Publication:  1968
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.