An electrical bias is applied across {HEAD ~ the gap} between the belt and {TAIL ~ the overcoated ohmic layer} 
between
An electrical bias is applied across { HEAD ~ the gap } between the belt and { TAIL ~ the overcoated ohmic layer }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL