A diaphragm is biased into sealing engagement with the valve seat to provide {HEAD ~ a fluid seal} between the ink inlet and {TAIL ~ the ink outlet} 
between
A diaphragm is biased into sealing engagement with the valve seat to provide { HEAD ~ a fluid seal } between the ink inlet and { TAIL ~ the ink outlet }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL