Based on adopting and assimilating advanced Japanese, German and Formosan technology, these self-researched and designed machines of practical type are widely used for manufacturing compound bags, centre joint coated bags, light bags with wide mouth size , container bags, color bar waterproof bags and other relative fields. Machines of this type have many traits such as convenience in operation, reasonable structure, less quick-wear parts, lower energy consumption as well as smooth and flat surface of woven bags etc.