This sewing system, fixed to the floor is used to close paper, polypropylene, or polyethylene (thickness +/-120 µ) bags. Most commonly used in the milling industry to fold BOPP laminated bags prior to sewing. This prevents product seepage and strengthens the closure preventing tearing of the bag. The already reshaped bag is introduced into the infeed which folds the bag top and simultaneously guides the bag to the sewing head. The sewing process starts when the photo sensor detects the bag. At the end the pneumatic chain pusher pushes the chain into the knives to cut it. To have a smooth operation of the system, a conveyor is required.