D. writer means responsive to applied electrical signals for forming {HEAD ~ images} on {TAIL ~ receiver sheets} 
D. writer means responsive to applied electrical signals for forming { HEAD ~ images } on { TAIL ~ receiver sheets }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL