An electrostatic copier having a control system wherein {HEAD ~ switches} are used to detect {TAIL ~ conditions} that would lead to paper jams 
are used to detect
An electrostatic copier having a control system wherein { HEAD ~ switches } are used to detect { TAIL ~ conditions } that would lead to paper jams
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH