Nonlinear Line of Weakness Formed by a Perforating Apparatus

Abstract

A web may include a curvilinear line of weakness comprising a plurality of perforations. Each of the plurality of perforations may be separated by a bond area and each of the plurality of perforations may have a perforation length. Each bond area may have a non-perforation length. At least two of the perforations lengths may be substantially equal.

What is claimed is: 
     
         1 . A web comprising:
 a curvilinear line of weakness, the curvilinear line of weakness comprising a plurality of perforations, wherein each of the plurality of perforations is separated by a bond area;   wherein each of the plurality of perforations has a perforation length and each bond area has a non-perforation length; and   wherein at least two of the perforations lengths are substantially equal.   
     
     
         2 . The web of  claim 1 , wherein at least two non-perforation lengths are substantially equal. 
     
     
         3 . The web of  claim 1 , wherein each of the perforation lengths of the plurality of perforations are substantially equal. 
     
     
         4 . The web of  claim 1 , wherein the curvilinear line of weakness has a peak tensile strength of from about 1% to about 40% less than the peak tensile strength of a straight line of weakness imparted to the web. 
     
     
         5 . The web of  claim 1 , wherein the curvilinear line of weakness has a peak tensile strength that is at least about 5% less than the peak tensile strength of a straight line of weakness. 
     
     
         6 . The web of  claim 1 , wherein the curvilinear line of weakness has a failure TEA of about 1% to about 50% less than the failure TEA of a straight line of weakness. 
     
     
         7 . The web of  claim 1 , wherein the curvilinear line of weakness has a failure TEA of at least about 5% less than the failure TEA of a straight line of weakness. 
     
     
         8 . A web comprising:
 a curvilinear line of weakness, the curvilinear line of weakness comprising a plurality of perforations, wherein each of the plurality of perforations is separated by a bond area;   wherein each of the plurality of perforations has a perforation length and each bond area has a non-perforation length; and   wherein at least two of the non-perforations lengths are substantially equal.   
     
     
         9 . The web of  claim 8 , wherein at least two of the perforation lengths are substantially equal. 
     
     
         10 . The web of  claim 8 , wherein each of the non-perforation lengths are substantially equal. 
     
     
         11 . The web of  claim 8 , wherein the curvilinear line of weakness has a peak tensile strength of from about 1% to about 40% less than the peak tensile strength of a straight line of weakness imparted to the web. 
     
     
         12 . The web of  claim 8 , wherein the curvilinear line of weakness has a peak tensile strength that is at least about 5% less than the peak tensile strength of a straight line of weakness. 
     
     
         13 . The web of  claim 8 , wherein the curvilinear line of weakness has a failure TEA of about 1% to about 50% less than the failure TEA of a straight line of weakness. 
     
     
         14 . The web of  claim 8 , wherein the curvilinear line of weakness has a failure TEA of at least about 5% less than the failure TEA of a straight line of weakness.