Patent ID: 8216030
Filing Date: 2012-07-10
Classification: B24D,Y10T

Abstract:
1. A flexible grinding product, which comprises a flexible underlay having at least one abrasive receiving upper layer having first and second surfaces and a lower layer, the grinding product formed by the method comprising sequential steps of: a) first perforating the abrasive receiving layer with through-holes spaced over and through the first and second surfaces thereof; b) then laminating the second surface of the abrasive receiving upper layer to said lower layer forming cavities in a top surface of the resulting laminating underlay, said cavities having sidewalls which are not substantially deformed at their hole edges since the holes are perforated before lamination; c) then applying adhesive selectively to the first surface of the remaining exposed surface of the abrasive receiving upper layer d) then applying abrasive to said adhesive of exposed surface, thereby adhesively bonding the abrasive to the abrasive receiving upper layer; whereby the through-holes remain free of abrasive and retain sharp edged sidewalls created when perforated and wherein said at least one adhesive layer simultaneously covers and strengthens at least part of edge layer interface surfaces of the cavities, whereby the cavities provide space for grinding dust and residues and facilitate their removal from the surface being ground.