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