Folded sheets

Abstract

The present invention relates to a sheet material which includes a first fold line and a second fold line. The first fold line and the second fold line are defined by a series of at least partial perforations in the sheet material. There are no at least partial perforations at an intersection of the first fold line and the second fold line. The sheet material is quadrilateral.

1 . A sheet material comprising a first fold line and a second fold line, the first fold line and the second fold line being defined by a series of at least partial perforations in the sheet material, wherein there are no at least partial perforations at an intersection of the first fold line and the second fold line, and wherein the sheet material is quadrilateral.  
   
   
       2 . A sheet material according to  claim 1 , in which the first fold line and the second fold line are substantially perpendicular to one another.  
   
   
       3 . A sheet material as claimed in  claim 1 , in which the sheet material comprises a plurality of first fold lines, providing a first set of fold lines.  
   
   
       4 . A sheet material according to  claim 3 , in which the sheet material further comprises a plurality of second fold lines, providing a second set of fold lines.  
   
   
       5 . A sheet material as claimed in  claim 1 , where there are no at least partial perforations at each intersection of the first set of fold lines and second set of fold lines.  
   
   
       6 . A sheet material as claimed in  claim 1 , wherein there is a non-perforated section at an intersection of a fold line with an edge of the sheet material.  
   
   
       7 . A sheet material as claimed in  claim 1 , wherein there are no at least partial perforations at the intersection of the first fold line and second fold line, wherein an intersection spacing is defined, and wherein the intersection in a direction along either the first fold line or the second fold line is larger than the space in between the at least partial perforations of the first fold line or the second fold line.  
   
   
       8 . A sheet material comprising a plurality of first fold lines providing a first set of fold lines, and transverse to the first set of fold lines a plurality of second fold lines providing a second set of fold lines, the first set of fold lines and the second set of fold lines defining a plurality of segments, the first set of fold lines and the second set of fold lines being defined by a series of at least partial perforations in the sheet material, where there are no at least partial perforations at the intersections of the first set of fold lines and the second sets of fold lines, and wherein the first set of fold lines and the second sets of fold lines define a plurality of segments of substantially the same dimensions.  
   
   
       9 . A sheet material according to  claim 8 , in which the first fold lines and the second fold lines are substantially perpendicular to one another.  
   
   
       10 . A sheet material according to  claim 8 , in which the fold lines of the first set are substantially parallel to one another.  
   
   
       11 . A sheet material according to  claim 8 , in which the fold lines of the second set are substantially parallel to one another.  
   
   
       12 . A sheet material according to  claim 8 , in which there are no at least partial perforations at each intersection of a first fold line and a second fold line.  
   
   
       13 . A sheet material as claimed in  claim 8 , wherein there is a non-perforated section at an intersection of a fold line with an edge of the sheet material.  
   
   
       14 . A sheet material as claimed in  claim 8 , wherein there are no at least partial perforations at the intersection of the first set of fold lines and the second set of fold lines, wherein an intersection spacing is defined, and wherein the intersection in a direction along either the first set of fold lines or the second set of fold lines is larger that the space in between the at least partial perforations of the first set of fold lines or the second set of fold lines.