Registration of {TAIL ~ envelopes} is established at {HEAD ~ the entrance} and is maintained by a horizontal flat registration plate located about half of the travel distance between the entrance and exit pulleys 
Registration of { TAIL ~ envelopes } is established at { HEAD ~ the entrance } and is maintained by a horizontal flat registration plate located about half of the travel distance between the entrance and exit pulleys
OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH