In {TAIL ~ addition}, {HEAD ~ two opposed idler wheels} bias the spans together above the horizontal flat registration plate at about 3/5 of the travel distance through the assembly 
In { TAIL ~ addition } , { HEAD ~ two opposed idler wheels } bias the spans together above the horizontal flat registration plate at about 3/5 of the travel distance through the assembly
REL TAIL TAIL TAIL TAIL TAIL OTH HEAD 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 OTH OTH