The SBH series roll fed square bottom paper bag machine is designed to manufacture square bottom paper bags from paper roll in blank or printed designs. Side gluing, tube forming, tube cutting, bottom creasing, bottom gluing, bottom forming and final product out feed can all be completed within a single operation pass by this machine. It is ideal equipment for making paper bags for food, shopping bag and other commonly used paper bags. The machine use German machinery manufacturing technology and ideas, including a high speed movement of the central control system (CPU) control. The bag length can be adjusted by servo system, allowing the machine to create bags in various specifications. Different models (SBH330B/450B) can also have a twisted or flat handle unit added to the production line.