FBP-4W Paper Bag Folded Mouth Heat Press Sealing Machine

• Inner Bag Hot-Air Preheating: The FBP-4W first applies hot air to preheat the inner bag. This prepares the liner for the following heat-sealing operation. • Inner Bag Heat Sealing: The prepared inner bag is then heat sealed using four groups of heating blocks. This establishes the internal closure before the outer paper bag is folded. • Pressure Roller Processing: The sealed inner bag mouth passes through pressure rollers to process the closure and prepare the bag mouth for the folding stages. • Fold-Line Creasing: The machine then forms a crease along the designated fold line. This establishes the position at which the outer bag mouth will be folded. • 90° Bag-Mouth Folding: The outer bag mouth is folded through a 90° folding operation. The catalogue specifies a 50 mm fold height for the FBP-4W configuration. • Hot-Air Adhesive Activation: Hot air is applied to the hot-melt adhesive coating at the folded section, activating the adhesive for the outer-mouth sealing stage. • Final Pressure Sealing: Pressure rollers then press the folded section to complete the heat-press sealing process and establish the final folded-mouth closure.