In operation, {HEAD ~ the consumer} unscrews {TAIL ~ the cap} from the spout, ruptures the sealing membrane 44 at the top of the spout and pours the desired amount of liquid out of the carton 
unscrews
In operation , { HEAD ~ the consumer } unscrews { TAIL ~ the cap } from the spout , ruptures the sealing membrane 44 at the top of the spout and pours the desired amount of liquid out of the carton
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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