{HEAD ~ the amount} of fabric per {TAIL ~ unit volume} of elastomer is greater in said tooth bottoms than in said tooth portions 
{ HEAD ~ the amount } of fabric per { TAIL ~ unit volume } of elastomer is greater in said tooth bottoms than in said tooth portions
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH