On vertical bag packaging machines, the rolls of plastic film are stretched over a forming tube and fed down through the machine before or during filling.
On horizontal tubular bag form fill and seal machines, the packaging material is formed with a special tool, after which it moves through the machine to be filled and immediately sealed and positioned horizontally.
The tubular bag packaging machine automatically collects individual, pre-made bags from the bag stock, stretches them and transfers them to the filling station. On exit from the filling station, the bag is then transferred to the sealing station.
Tubular bag packaging machines are mainly used for use in manufacturing plants. The use of these machines enables a diverse range of products to be packed in tubular bags. These are supplied in tubular form packaging, which can be opened, filled and then sealed inside the machine. Individual filled packs are obtained from a continuous feed of a single tube. Modern tubular bag packaging machines have a very high output capacity and can be used without interruptions, even on changeover of the packaging roll. This helps ensure a very high degree of efficiency.