METHOD AND DEVICE FOR GUIDING SIDE EDGE OF CONTINUOUSLY RUNNING WEB

摘要

A roll means comprising a first nip roll (61) rotating about a shaft (66) extending in a direction defined between a machine direction (MD) and a cross direction (CD) is put in contact with a side edge (31) of a web (21) continuously running in the machine direction (MD). The shaft (66) is mounted on an arm (49) adapted to rotate back-and-forth so that the shaft (66) can swing in- and outward in the cross direction (CD). Downstream of the roll means, the side edge (31) is position-detected and the arm (49) is made swing by a desired angle determined on the basis of a difference between the actual position and a desired position of the side edge (31). <IMAGE>