The air curtain or barrier is generated by a ported manifold and {HEAD ~ supply} located either on the oven housing exterior adjacent {TAIL ~ the opening} or inside the oven housing adjacent the opening 
located adjacent
The air curtain or barrier is generated by a ported manifold and { HEAD ~ supply } located either on the oven housing exterior adjacent { TAIL ~ the opening } or inside the oven housing adjacent the opening
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH