PACKAGING PLANT This is shown and described in Figures 8.3 and 8.4, the former being a schematic sketch of the packing machines, and the latter is the key to the various operations from feeding the reel of heat-sealable laminated paper to discharging the filled 1 litre packs for insertion in outer packaging Figure 8.5 shows and describes the sterile air system. The system described is the Swedish Tetra Brik system, but alternative packaging systems are available which operate in much the same way litre packs can be collated by the packer and shrinkwrapped on trays Figure 8.3 Drawing of packing machine for 1 litre milk packs Courtesy of TetraPak-t s _._~ - 5- I 13 - .~