This Split belt makes it possible to additionally check the folded but not closed longitudinal seam. Because the lower conveyor is split into two belts, the longitudinal seam can “leak” in this space. It prevents the effect of a poorly sealed longitudinal seam being held “closed” as a result of the test pressure during measurement. If the longitudinal seam is at the top, the top conveyor can also be fitted with two split belts. Click on the picture for a video.