The counter shaft is attached at one end to {TAIL ~ a magnet wheel} which communicates with a printed circuit board to ensure {HEAD ~ accurate advancement} of the cover material 
The counter shaft is attached at one end to { TAIL ~ a magnet wheel } which communicates with a printed circuit board to ensure { HEAD ~ accurate advancement } of the cover material
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH