ZDF-KM190/350 is designed to produce various square bottom paper bags with OPP film window fully automatically from plain or pre-printed paper roll, auto web correction, print mark registry, hole punching, window film patching, edge gluing, tube forming, tube cutting, bottom forming and bags collection with counting. It is equipped with Japanese Mitsubishi servo-motor system, with advantage of stable performance and easy operation. The produced paper bags are with accurate sizes and good outlook. It can save much labor cost and create remarkable profits, and is an ideal equipment for paper bag manufacturers.