US Patent 7172501 Flapped grinding disk

A flapped grinding disk having a disk- or plate-shaped support including an outer periphery, and a plurality of spaced-apart, discrete groups of grinding flaps forming a plurality of apertures, wherein the flaps overlap each other on the support in the manner of shingles, are secured in an adhesive bed, and define an outer circumference, wherein the radial dimension of the aperture from the outer periphery of the support to the outer circumference is substantially commensurate with the radial dimension of the groups of grinding flaps from the outer periphery of the support to the outer circumference.