After {TAIL ~ the front edge} of the document sheet touches the stopper 101, {HEAD ~ the motor} 21 is run for an extra period of time sufficient for moving the conveyer belt 10 by about 10 mm 
After { TAIL ~ the front edge } of the document sheet touches the stopper 101 , { HEAD ~ the motor } 21 is run for an extra period of time sufficient for moving the conveyer belt 10 by about 10 mm
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH