of movement of the two heads 12 and 13 respectively the time datum is a representative instant at which gobs of molten glass are fed into the three parison moulds at the blank station this instant and successive such instants being indicated by load in fig4 the operational sequence of the head 12 shown by the upper of the two horizontal strips in fig4 is then ______________________________________ reference intime secs operation fig4 ______________________________________1 5 to 1 7 tongs 16 close and blow 35 moulds open1 7 to 1 8 head 12 lifts bottles 36 from blow station1 8 to 2 4 head 12 moves to 37 intermediate position over deadplate 252 4 to 4 2 head 12 supports bottles 38 over deadplate 25 for deadplate hanging4 2 to 4 4 carriage 3 shifts on guide 39 rods 6 and 74 4 to 5 8 carriage supports bottles for extra deadplate hanging 405 8 to 6 1 head 12 lifts bottles 416 1 to 6 7 head 12 moves to position 42 over lehr mat 27 and rotates bottles about vertical axes6 7 to 6 8 tongs 16 open to deposit 43 bottles on lehr mat 276 8 to 6 9 tongs 16 are raised to clear 44 deposited bottles6 9 to 7 2 tongs 16 are rotated and head 45 12 moved back towards blank station7 2 to 7 4 carriage 3 shifts 46______________________________________ the head.