A lid sheet is {TAIL ~ heat} sealed to {HEAD ~ the container sheet} over the thermoformed containers so as to produce a pair of spaced apart, annular bead heat seals 
A lid sheet is { TAIL ~ heat } sealed to { HEAD ~ the container sheet } over the thermoformed containers so as to produce a pair of spaced apart , annular bead heat seals
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH 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