US 7,556,558 B2
	Shape controlled abrasive article and method
Gary M. Palmgren, Lake Elmo, Minn. (US)
Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US)
Filed on Sep. 27, 2005, as Appl. No. 11/236,461.
Prior Publication US 2007/0072527 A1, Mar. 29, 2007
Int. Cl. B23F 21/03 (2006.01)

U.S. Cl. 451—540  [451/541; 451/548; 451/559]

19 Claims

1. An abrasive tool comprising a substrate, attached to said substrate a selected population of sorted abrasive particles, wherein the selected population is selected from at least two subpopulations of size-sorted and shape-sorted abrasive particles obtained by sorting a plurality of abrasive particles based on size and shape from a general population of abrasive particles having a nonuniform size and shape, wherein each of the at least two subpopulations of shape-sorted abrasive particles is characterized by an average shape, and further wherein the selected population is selected to have a mean Shape Parameter that is controlled to within about 1% of a target value, resulting in a population of abrasive particles having a uniform size and shape.