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