Abrasing tool

Abstract

An abrading tool ( 10 ) includes an abrasive belt ( 11 ) loosely wrapped around an elongated block ( 12 ). A tension adjuster ( 22 ) is inserted between the belt ( 11 ) and the block ( 12 ). The tension in the belt ( 11 ) is adjusted by sliding the tension adjuster ( 22 ) on the block ( 12 ). Alternatively, an abrading tool ( 40 ) includes an abrasive sheet ( 41 ) wrapped around a base block ( 42 ). The two ends of the sheet ( 41 ) are disposed in a slot ( 52 ) on the base block ( 42 ). A mounting block ( 62 ) tightly fits into the slot ( 52 ) to secure the abrasive sheet ( 41 ) to the base block ( 42 ).

1 . An abrading tool, comprising: 
 a block having a first surface, a second surface opposite to the first surface, a first end between the first surface and the second surface, and a second end between the first surface and the second surface and opposite to the first end;    an abrasive belt wrapped around said block; and    a tension adjuster inserted between the first surface of said block and said abrasive belt, said tension adjuster adjusting a tension in said abrasive belt by sliding on the first surface of said block.    
     
     
         2 . The abrading tool of    claim 1   , wherein the tension in said abrasive belt increases as said tension adjuster slides toward one of the first end and the second end of said block.  
     
     
         3 . The abrading tool of    claim 1   , wherein the second surface of said block is substantially flat.  
     
     
         4 . The abrading tool of    claim 1   , wherein the second surface of said block is curved.  
     
     
         5 . The abrading tool of    claim 1   , wherein: 
 said tension adjuster has a first side and a second side substantially perpendicular to the first side; and    said tension adjuster has a first dimension along the first side and a second dimension along the second side, the first dimension being greater than the second dimension.    
     
     
         6 . The abrading tool of    claim 5   , wherein the tension in said abrasive belt is greater when the first side of said tension adjuster is substantially perpendicular to the first surface of said block than the tension in said abrasive belt when the first side of said tension adjuster is substantially parallel to the first surface of said block.  
     
     
         7 . The abrading tool of    claim 1   , wherein said tension adjuster suspends a portion of said abrasive belt above the first surface of said block.  
     
     
         8 . The abrading tool of    claim 7   , wherein a first section of said abrasive belt located between the first end of said block and said tension adjuster and a second section of said abrasive belt located between the second end of said block and said tension adjuster are aslant with respect to the first surface of said block.  
     
     
         9 . A holder for an abrasive belt, comprising: 
 an elongated block having a first major surface, a second major surface opposite to the first major surface, a first end coupled between the first major surface and the second major surface, and a second end coupled between the first major surface and the second major surface and opposite to the first end;    a tension adjuster inserted between the first major surface of said elongated block and the abrasive belt when the abrasive belt is wrapped around the first major surface, the first end, the second major surface, and the second end of said elongated block; and    wherein a tension in the abrasive belt is increased by moving said tension adjuster between the first major surface of said elongated block and the abrasive belt toward one of the first end and the second end of said elongated block.    
     
     
         10 . The holder of    claim 9   , wherein said tension adjuster pushes the abrasive belt away from the first major surface of said elongated block.  
     
     
         11 . The holder of    claim 10   , wherein a section of the abrasive belt located between the first end of said elongated block and said tension adjuster forms a slanted surface with respect to the first major surface of said elongated block.  
     
     
         12 . The holder of    claim 9   , wherein the first major surface of said elongated block is substantially flat.  
     
     
         13 . The holder of    claim 9   , wherein the second major surface of said elongated block is substantially flat.  
     
     
         14 . The holder of    claim 9   , wherein the second major surface of said elongated block is curved.  
     
     
         15 . An abrader, comprising: 
 a base block having a first surface and a second surface opposite to each other, the first surface having a first edge, a second edge, and a slot thereon between the first edge and the second edge;    an abrasive sheet stretched over the second surface of said base block and having a first end and a second end positioned in the slot on the first surface of said base block; and    a mounting block removably fitted in the slot on the first surface of said base block and securing the first end and the second end of said abrasive sheet to said base block.    
     
     
         16 . The abrader of    claim 15   , wherein: 
 the second surface of said base block is substantially flat; and    said base block further has a third surface and a fourth surface opposite to each other and coupled between the first surface and the second surface.    
     
     
         17 . The abrader of    claim 15   , wherein the second surface of said base block is curved and intersects with the first surface of said base block at the first edge and the second edge of the first surface of said base block.  
     
     
         18 . The abrader of    claim 15   , wherein a portion of said mounting block protrudes from the first surface of said base block, the portion of said mounting block having a first side adjacent the first edge of the first surface of said base block and a second side adjacent the second edge of the first surface of said base block.  
     
     
         19 . The abrader of    claim 18   , wherein the first side and the second side of the portion of mounting block is substantially perpendicular to the first surface of said base block.  
     
     
         20 . The abrader of    claim 18   , wherein the first side of the portion of mounting block is substantially parallel to the first edge of the first surface of said base block.