In-barrel, out-barrel adopt of barometric-type, to keep time of in-barrel & out-barrel accurate. Water trough roller adopts of variable speed motor, single driving to adjust the water supply evently. Plate dirts scraper deviced with rubber support, high safety, and easy to operate. High speed out-barrel device, when paper sticks on the rubber barrel, out-barrel can be functioned immediately to protect the rubber cloth. Auto. Electronic device for time setting and quantified oil feeding.