{HEAD ~ An upper ramp} is disposed upstream from {TAIL ~ the accumulation section} and is movable into and out of the sheet feed plane 
is disposed upstream from
{ HEAD ~ An upper ramp } is disposed upstream from { TAIL ~ the accumulation section } and is movable into and out of the sheet feed plane
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH