{HEAD ~ A clamping arrangement} keeps {TAIL ~ the foam sheet material} in linear alignment at the location where the sample is severed 
keeps
{ HEAD ~ A clamping arrangement } keeps { TAIL ~ the foam sheet material } in linear alignment at the location where the sample is severed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH