The diaphragm is biased to a closed position and so seals {HEAD ~ the ink supply} from the printhead as a default condition even in the event of {TAIL ~ a power failure} 
The diaphragm is biased to a closed position and so seals { HEAD ~ the ink supply } from the printhead as a default condition even in the event of { TAIL ~ a power failure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL