| 摘要 |
A number of closely notched slits 35 of a predetermined depth which have fine convex portions of the surface of each band sheet bitten thereinto and which are pulled to the convex portions and deformed to form cavities to generate negative pressure are provided at predetermined intervals over the entire peripheral length of the endless belt, over the entire width of the belt in a width direction to a longitudinal direction of the endless belt, on the outer surface 31 a of the endless belt 3, touching each band sheet 4, which is constructed by laminating an outer surface layer 31 and an inner surface layer 33 using at least two-layer different materials. |
