It will be further understood that the electronic controller can receive feedback from {HEAD ~ upstream and downstream devices} in {TAIL ~ order} to determine the proper speeds of the various rollers, and can receive feedback from various sensors situated in accumulating apparatus 10 to determine the location of sheets or to count the number of sheets accumulating in accumulation area 20 
It will be further understood that the electronic controller can receive feedback from { HEAD ~ upstream and downstream devices } in { TAIL ~ order } to determine the proper speeds of the various rollers , and can receive feedback from various sensors situated in accumulating apparatus 10 to determine the location of sheets or to count the number of sheets accumulating in accumulation area 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH