Food-packing film

Abstract

A film of a ribbon-shaped synthetic material is wound as a roll on a supporting core. At least one of the side edges of the film ribbon is incised with small cuts at right angles to said side edges, at spaced intervals along it.

What is claimed is:  
     
         1 . A ribbon-like food-packing film of a synthetic material, wound as a roll on a supporting core, wherein at least one of the side edges of the film ribbon is incised with small cuts at right angles to said at least one of the side edges, at spaced intervals along it.  
     
     
         2 . The film of  claim 1 , wherein both side edges of the film are incised with said cuts.  
     
     
         3 . The film of  claim 1 , wherein said cuts are about 1 mm deep.  
     
     
         4 . The film of  claim 1 , wherein said intervals are less than 50 mm.  
     
     
         5 . The film of  claim 1 , wherein said intervals are about 10 mm.  
     
     
         6 . The film of  claim 1 , wherein it has a preferential direction of tear propagation that is at right angles to the longitudinal direction of the film ribbon.  
     
     
         7 . The film of  claim 6 , wherein it comprises macromolecules prevalently oriented according to said preferential direction of tear propagation.  
     
     
         8 . The film of  claim 1 , wherein said roll of film is contained in a box having a rectilinear slot and carrying a waxy strip extending near one of its edges.  
     
     
         9 . The film of  claim 1 , wherein said cuts are obtained by hitting the side of the finished roll of film with a cutting tool comprising spider-arranged cutting blades.