{HEAD ~ An edge coating} of polymer or other material is disposed on and seals the interior edge of the base sheet and may project beyond {TAIL ~ the facial planes} of the base sheet to define protruding rims extending around the aperture 
project beyond
{ HEAD ~ An edge coating } of polymer or other material is disposed on and seals the interior edge of the base sheet and may project beyond { TAIL ~ the facial planes } of the base sheet to define protruding rims extending around the aperture
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH