To provide a wrinkle preventive method of a long size sheet having surface frictional resistance capable of preventing wrinkles generated in parallel to the carrying direction in the line carrying of the long size sheet having the surface frictional resistance.
A method includes a sheet direction changing curved surface 9 for changing the carrying direction by making a long size sheet 1 contact with a carrying line for carrying the long size sheet 1 having surface frictional resistance at a predetermined embracing angle α, prevents wrinkles generated in parallel to the carrying direction on the long size sheet 1 when passing through the sheet direction changing curved surface 9, and prevents the wrinkles by moving or restricting the long size sheet 1 in the width direction by jetting or sucking fluids from holes 10 arranged at a predetermined interval (i) and in a hole diameter (d) in the sheet direction changing curved surface 9.
KOTO HIROSHI
TAGA KATSUTOSHI
