3.Left and right side baffles, electric guide mechanism, stable and precise displacement. 4.Clutch warning, double pneumatic locking, safe and reliable 5.The upper paper feed roller (roller diameter is 136mm) is seamless steel pipe, wrapped with 6.The down paper feeding roller(Ф136mm) is the seamless steel tube , ginning and hard chromium plating ,balance correction . 7.The gap between the paper feeding roller and the worm wheel are adjusted by the dial, the adjustment range is 0-12mm, and the structure of the cross slider is adopted, and the transmission gear will always maintain the correct meshing state when adjusting. 8.Equipped with high-quality brushes and a dust suction device, it can remove a large amount of impurities on the printing surface of the cardboard and improve the printing quality