Tack free cauterized edge for pressure sensitive adhesive web

Abstract

The invention relates to a web material comprising a carrier sheet, a continuous pragmatic sheet and an adhesive layer wherein said adhesive layer is between said carrier sheet and said pragmatic sheet, said adhesive layer more strongly adheres to said pragmatic sheet and said pragmatic sheet is narrower than said carrier sheet wherein the side of said carrier sheet in contact with said adhesive is reflective.

1 .- 38 . (canceled)  
   
   
       39 . A method of forming a tack free web comprising providing a web material comprising a carrier sheet, a continuous pragmatic sheet and an adhesive layer wherein said adhesive layer is between said carrier sheet and said pragmatic sheet, said adhesive layer more strongly adheres to said pragmatic sheet, bringing said web material into contact with at least two lasers that are adjusted so as to cut said pragmatic sheet and said adhesive layer but not said carrier sheet, stripping the pragmatic sheet and adhesive layer from the area between said partial cutters, bringing the stripped area of said carrier sheet into contact with a carrier cutter to separate said carrier sheet and form a plurality of tack free webs.  
   
   
       40 . The method of  claim 39  wherein said laser has a wavelength between 100 and 20,000 nm.  
   
   
       41 . The method of  claim 39  wherein said laser utilizes CO 2  gas.  
   
   
       42 . The method of  claim 39  wherein cutting of said pragmatic sheet occurs at a rate greater than 25 meters/min.  
   
   
       43 . The method of  claim 39  wherein cutting of said pragmatic sheet results the carrier sheet being cut less than 1.2 micrometers.  
   
   
       44 . The method of  claim 39  wherein said adhesive layer is cauterized at the slit edge.  
   
   
       45 . The method of  claim 39  wherein said laser has a spot size between 20 and 100 micrometers.  
   
   
       46 . The method of  claim 39  wherein said laser has an energy density at the focused spot between 10 and 70 J/m 2    
   
   
       47 . The method of  claim 39  wherein said laser has a pulse width of between 10 and 100 microseconds.  
   
   
       48 . The method of  claim 39  wherein said pragmatic sheet comprises an oriented polymer.  
   
   
       49 . The method of  claim 39  wherein said pragmatic sheet comprises at least one imaging layer.  
   
   
       50 . The method of  claim 49  wherein said imaging layer comprises silver halide.  
   
   
       51 . The method of  claim 49  wherein said imaging layer comprises ink jet receiving layer.  
   
   
       52 . The method of  claim 49  wherein said imaging layer comprises thermal dye receiving layer.  
   
   
       53 . The method of  claim 49  wherein said imaging layer comprises electrophotographic receiving layer.  
   
   
       54 . The method of  claim 49  wherein said imaging layer comprises pigment ink.