At the latter end of the assembly, the cover material is slit by {HEAD ~ a razor blade} protruding from {TAIL ~ an inside edge} of the seat and extends over a counter shaft before being received on the take up roll 
At the latter end of the assembly , the cover material is slit by { HEAD ~ a razor blade } protruding from { TAIL ~ an inside edge } of the seat and extends over a counter shaft before being received on the take up roll
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH