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