{TAIL ~ An upper retaining member} is linked to {HEAD ~ the upper ramp} and is movable into and out of the sheet feed plane in alternating relation to the upper ramp 
{ TAIL ~ An upper retaining member } is linked to { HEAD ~ the upper ramp } and is movable into and out of the sheet feed plane in alternating relation to the upper ramp
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH