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