Roll-type sandpaper with cutting lines and apparatus for manufacturing cutting lines

Abstract

Disclosed is a roll-type sandpaper, including a base sheet formed of paper or fabric and an abrasive coated to a front surface of the base sheet. Further, the roll-type sandpaper is wound many times, and has a plurality of cutting lines formed in parallel with predetermined intervals and barcodes between the cutting lines on a back surface of the base sheet. Thus, the roll-type sandpaper is advantageous in terms of a small storage volume, and easy cutting by the cutting line even without an additional cutting tool. Moreover, the sandpaper can be purchased in quantities required for abrasion by the barcode, thereby increasing work efficiencies and generating economic benefits. In addition, an apparatus for forming the cutting lines of the sandpaper is provided.

1 . A roll-type sandpaper, comprising a base sheet formed of paper or fabric and an abrasive coated to a front surface of the base sheet, wherein the sandpaper is wound many times, and has a plurality of cutting lines, each of which is formed in parallel by a predetermined interval and has a plurality of slits.  
   
   
       2 . The sandpaper as defined in  claim 1 , wherein the abrasive is coated to a middle portion spaced from both side ends of the front surface of the base sheet in a longitudinal direction of the base sheet, thereby providing a non-abrading surface, which is formed at both sides of the middle portion of the base sheet and is not coated with the abrasive.  
   
   
       3 . The sandpaper as defined in  claim 1 , further comprising a barcode provided between the cutting lines on a back surface of the base sheet.  
   
   
       4 . The sandpaper as defined in  claim 2 , further comprising a barcode provided between the cutting lines on a back surface of the base sheet.  
   
   
       5 . The sandpaper as defined in  claim 1 , further comprising a V-shaped cut formed to at least one end of the respective cutting lines.  
   
   
       6 . The sandpaper as defined in  claim 2 , further comprising a V-shaped cut formed to at least one end of the respective cutting lines.  
   
   
       7 . The sandpaper as defined in  claim 2 , further comprising at least one both-sided adhesive provided on the back surface of the base sheet, corresponding to the position of the non-abrading surface formed to the front surface of the base sheet.  
   
   
       8 . An apparatus for manufacturing cutting lines of a sandpaper, comprising: 
 a first roller equipped with at least one steel blade, and    a second roller positioned above the first roller and having a surface made of an elastic material,    wherein equally-spaced cutting lines are formed to a sandpaper strip transferring between the first roller and the second roller by rotation of the first roller.    
   
   
       9 . The apparatus as defined in  claim 8 , wherein the steel blade is saw toothed.