2007 Italdibipack Dibipack 4255EV Plastic packs A compact, semi-automatic chamber shrink plastic machine (l seal with shrink chamber) produced in Italy. It is used to wrap printed matter, boxes, books and consumables into transparent, protective shrinking plastics in a single operation. The model name 4255 indicates a maximum welding surface of 420 x 550 mm and the "EV" name stands for the electronic digital control that regulates welding time and temperature.