SUCTION ROLL, TRANSPORTATION DEVICE OF WEB AND TRANSPORTATION METHOD OF WEB

摘要

PROBLEM TO BE SOLVED: To provide a suction roll capable of preventing wrinkles caused when a web with low stiffness is transported by using a suction roll.SOLUTION: In a suction roll 1, a plurality of suction holes for sucking air are arranged on the surface of the roll. The suction roll has a high suction region 2 including a center in a roll width direction and having relatively high suction force and a low suction region 3 where suction force sandwiching the high suction region is more than 0 and relatively lower than the suction force in the high suction region on the surface of the roll. Generated wrinkles due to the suction roll are suppressed by guaranteeing suction force required for tension control in the high suction region and having the low suction region which can be slid on the roll corresponding to the change of a web width following the fluctuation of tension.SELECTED DRAWING: Figure 1