In principle the maximum width of the margin on an inner for {HEAD ~ a pack} according to {TAIL ~ the invention} is dictated by economic factors, but generally only a narrow folded margin is needed to give a substantial increase in stiffness at the edges of the sheet 
according to
In principle the maximum width of the margin on an inner for { HEAD ~ a pack } according to { TAIL ~ the invention } is dictated by economic factors , but generally only a narrow folded margin is needed to give a substantial increase in stiffness at the edges of the sheet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH