Dust vacuuming abrasive tool

Abstract

The present disclosure is directed to a dust vacuuming abrasive tool comprising an abrasive sheet material having an abrasive surface, a back surface and 20 or more perforations; and a backup pad having a support surface, a back surface and 20 or more perforations, or a plurality of perforations and also having, in the supporting surface. The configuration of the abrasive sheet and back-up pad eliminate the need to align perforations in the abrasive sheet and back-up pad.

1 . A dust vacuuming abrasive tool comprising: 
 a) an abrasive sheet material having an abrasive surface, a back surface and 20 or more perforations; and    b) a backup pad having a support surface, a back surface and    i) 20 or more perforations, or    ii) a plurality of perforations and also having, in the supporting surface, channels which interconnect the perforations and extend along lines connecting the 20 or more perforations of the abrasive sheet material;    the back surface of the abrasive sheet material being fixed detachably on the support surface of the backup pad    wherein the 20 or more perforations of the abrasive sheet material are approximately adjacent the backup pad perforations and are arranged in a lattice of equally spaced equilateral triangles,    wherein the diameter of the abrasive sheet material perforations are 2 to 8 mm,    wherein the distance between two adjacent perforations is not greater than 1.5 times the diameter of the perforations, and    wherein the diameter of the backup pad perforations is 80 to 120% of the diameter of the abrasive sheet material perforations.    
   
   
       2 . A dust vacuuming abrasive tool comprising: 
 a) an abrasive sheet material having an abrasive surface, a back surface and 20 or more perforations;    b) an intermediate pad having a supporting surface, a back surface and    i) 20 or more perforations, or    ii) a plurality of perforations and also having, in the supporting surface and/or the back surface, channels which interconnect the perforations and extend along lines connecting the 20 or more perforations of the abrasive sheet material, and    c) a backup pad having a supporting surface, a back surface and a plurality of perforations;    the back surface of the abrasive sheet material being fixed detachably on the supporting surface of the intermediate pad and the back surface of the intermediate pad being fixed detachably on the supporting surface of the backup pad;    wherein the 20 or more perforations of the abrasive sheet material are approximately adjacent the intermediate pad perforations and are arranged in a lattice of equally spaced equilateral triangles;    wherein the diameters of the perforations of the abrasive sheet material is 2 to 8 mm,    wherein the distance between two adjacent perforations is not greater than 1.5 times the diameters of the perforations, and    wherein the diameter of the perforations of the intermediate pad is 80 to 120% of the diameter of the perforations of the abrasive sheet material.    
   
   
       3 . The dust vacuuming abrasive tool according to  claim 2 , wherein the backup pad is: 
 i) a backup pad having a supporting surface, a back surface and 20 or more perforations, wherein the 20 or more perforations are approximately adjacent, and the diameter is 80 to 120% of, the abrasive sheet material perforations, or    ii) a backup pad having a supporting surface, a back surface and a plurality of perforations and also having, in the supporting surface, channels which interconnect the perforations and extend along lines connecting the 20 or more perforations of the abrasive sheet material.    
   
   
       4 . The dust vacuuming abrasive tool according to claims  1 , wherein the perforations of the abrasive sheet material are equally sized circles.