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