When {TAIL ~ the apparatus} has assumed {HEAD ~ the position} shown in FIG 2b, the carriage plates 8,9 are moved forward by an appropriate amount, to transfer the carton to its next filling position 
When { TAIL ~ the apparatus } has assumed { HEAD ~ the position } shown in FIG 2b , the carriage plates 8,9 are moved forward by an appropriate amount , to transfer the carton to its next filling position
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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