Method for drawing wire for staples

Abstract

There is a method for the production of stapling wire for use in the graphic industry for stapling periodicals, brochures and the like. A drawable wire is drawn from an initial material (A) having a low carbon content which is drawn in a first drawing step from a starting diameter (D 1 ) to a temporary diameter (D 2 ). This wire is drawn in a second drawing step from the temporary diameter (D 2 ) to a final diameter (D 3 ), so that a stapling wire results. This process provides a simple and economical method for producing stapling wire, wherein stapling wire is produced to fulfill the requirements of the graphic industry. In addition, this second drawing step is performed without previously subjecting the wire to a heat treatment.

What is claimed is:  
     
         1 . A method for the production of stapling wire in the graphic industry comprising: 
 providing a wire having a good starting material with a low carbon content and having a starting diameter D 1 ;    drawing said wire from said starting diameter D 1  to an intermediate diameter D 2 ; and    redrawing said wire from said intermediate diameter D 2  to said final diameter to produce said stapling wire wherein said reduction in cross-sectional diameter of said wire is greater than 80% wherein said wire does not undergo any heat treatment during the drawing process from said starting diameter D 1  to said final diameter D 2 .    
     
     
         2 . The method as in  claim 1 , wherein said step of providing a wire includes providing a wire with a starting material with a carbon content of less than 0.6%.  
     
     
         3 . The method as in  claim 1 , wherein said step of redrawing the wire draws the wire to a final diameter D( 3 ) that is greater than 99% reduced in diameter from said starting diameter D 1 .  
     
     
         4 . The method as in  claim 1 , wherein said step of providing a wire includes providing a wire having a starting diameter of less than 10 mm.  
     
     
         5 . The method as in  claim 1 , wherein said step of providing a wire includes providing a wire having a starting diameter of less than 5.5 mm.  
     
     
         6 . The method as in  claim 1 , wherein said step of redrawing the wire redraws the wire to less than 0.7 mm.  
     
     
         7 . The method as in  claim 1 , further comprising the step of applying a metallic coating to the wire as a surface finish between said first drawing step and said second drawing step.  
     
     
         8 . The method as in  claim 7 , wherein said wire is galvanized.  
     
     
         9 . The method as in  claim 1 , wherein said first drawing step is performed with a dry drawing process.  
     
     
         10 . The method as in  claim 1 , wherein said second drawing step is performed as a wet drawing process.  
     
     
         11 . The method as in  claim 1 , wherein said second drawing step is performed as a dry drawing step.  
     
     
         12 . The method as in  claim 1 , further comprising the step of adding a dry lubricant to said wire before said first drawing step and cleaning said wire to remove said lubricant.  
     
     
         13 . The method according to  claim 1 , further comprising the step of coiling the wire between said first drawing step and said second drawing step.  
     
     
         14 . The method as in  claim 13 , further comprising the step of applying a coating to the wire after the first drawing step wherein said wire is coiled up after the application of said coating.  
     
     
         15 . The method as in  claim 1 , wherein said second drawing step is performed without said wire having been coiled following the first drawing step.