securing a backing sheet of {HEAD ~ supple fabric material} with one broadside thereof affixed to the other broadside of {TAIL ~ the sheet} of flexible, resilient material 
securing a backing sheet of { HEAD ~ supple fabric material } with one broadside thereof affixed to the other broadside of { TAIL ~ the sheet } of flexible , resilient material
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH