Donut shaped sanding disk

Abstract

A sandpaper disk is formed having an exterior diameter and a central open area forming a ring shaped sandpaper disk. This is attached to a random orbital sander by an interface pad which separates the sandpaper disk from the surface of the sanding pad. The interface pad has a ring shape which corresponds in size to that of the sandpaper.

However, the invention itself should be defined by the appended claims wherein I claim:  
     
         1 . A random orbital sander having a sanding pad, an interface ring attached to said pad; 
 said ring having a central open portion and exterior edge extending around the peripheral edge of said sanding pad,    a sandpaper ring attached to said interface ring said sandpaper ring having an inner open diameter corresponding to the central open portion of said interface ring.    
     
     
         2 . The random orbital sander claimed in  claim 1  wherein said interface ring is separable from said sanding pad.  
     
     
         3 . The random orbital sander claimed in  claim 2  wherein said interface ring has an inner diameter defining said central open area and an outer diameter and wherein a distance from said inner diameter to said outer diameter is about ⅙th to about ½0 of said outer diameter.  
     
     
         4 . The random orbital sander claimed in  claim 2  wherein said interface ring is from {fraction (1/16)}th″ to ¾″ thick.  
     
     
         5 . The random orbital sander claimed in  claim 4  wherein said interface ring has the hardness of 20-90 durometer.  
     
     
         6 . In combination, a sandpaper ring and an interface pad said interface pad adapted to attach to a sanding pad of a sander said sandpaper ring and said interface pad each having inner and outer diameters said inner diameters defining a central open area.  
     
     
         7 . The combination claimed in  claim 6  wherein said interface pad and said sandpaper ring each having a width equal to the distance from said inner diameters to said outer diameters and wherein said widths are from ⅙th to about ½ of said outer diameters.  
     
     
         8 . The combination claimed in  claim 7  wherein said interface pad is from about {fraction (1/16)}th″ to about ¾″ thick.  
     
     
         9 . The combination claimed in  claim 8  wherein said interface pad has a hardness of 20 to 90 durometers.  
     
     
         10 . A sandpaper ring adapted to attach to a pad of a sander said sandpaper ring having an inner diameter and an outer diameter said inner diameter defining a central open area said pad having a width equal to the difference between said inner diameter and said outer diameter and wherein said width is from about one-sixth of about one-half of said outer diameter.  
     
     
         11 . The sandpaper ring claimed in  claim 10  wherein said ring has an outer diameter having a wavy edge.