It specifically pertains to a mechanism for cuffing {HEAD ~ an open end} of a bag about {TAIL ~ an open carton} periphery 
It specifically pertains to a mechanism for cuffing { HEAD ~ an open end } of a bag about { TAIL ~ an open carton } periphery
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH