The printing pins or wires are abutted against a movable membrane or bellows portion of {TAIL ~ the container}, so that container expansion effects linear movement of {HEAD ~ the pins} or wires 
The printing pins or wires are abutted against a movable membrane or bellows portion of { TAIL ~ the container } , so that container expansion effects linear movement of { HEAD ~ the pins } or wires
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH