The sealing engagement between the seal post distal end surface 512 and the valve central wall 370 serves to provide a highly effective seal which prevents {HEAD ~ unwanted dispensing} of product into {TAIL ~ the lid region} of the closure 
into
The sealing engagement between the seal post distal end surface 512 and the valve central wall 370 serves to provide a highly effective seal which prevents { HEAD ~ unwanted dispensing } of product into { TAIL ~ the lid region } of the closure
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH