{HEAD ~ The present invention} is generally directed to the field of document handling and processing technology and, in particular, to {TAIL ~ improvements} relating to the accumulation of material units 
is directed to
{ HEAD ~ The present invention } is generally directed to the field of document handling and processing technology and , in particular , to { TAIL ~ improvements } relating to the accumulation of material units
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH