PTF series is a new-generation automatic western style paper bag machine which has function of window opening, film posting, mouth glue coating, self-adhesive glue coating, paper posting, drying and folding etc. in a whole and different functions can be selected by customer according to his demand. Our company has become the one of fewer companies to produce such an integrated and automatic envelope machine after W+D, Germany and F. L. SMITH, USA in the world, which fills the gap in the country and most technical items of the machine are at leading position in the country. The machine has become the first choice to substitute the imported equipment for all large-scale envelope manufacturers.