At no time in this procedure are {HEAD ~ the banknotes} out of {TAIL ~ contact} with the forces which hold them together 
out of
At no time in this procedure are { HEAD ~ the banknotes } out of { TAIL ~ contact } with the forces which hold them together
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH