layer surface is smoothed however in the calender apparatus 10 as shown in fig1 a roll cleaning apparatus 20 is provided in each of the metal rolls 11 a to 11 c in this case the roll cleaning apparatus 20 can also be provided in each of the elastic rolls 12 a and 12 b the roll cleaning apparatus 20 provided in the metal roll 11 a the same as the roll cleaning apparatus 20 provided in other metal rolls 11 b etc is hereinafter explained the roll cleaning apparatus 20 has a wiping cloth feeding apparatus 21 a cleaning liquid supply apparatus 22 and a wiping cloth pressing apparatus 23 the wiping cloth feeding apparatus 21 has a brake equipped unwinding reel 21 a a motor equipped winding reel 21 b and feeding gears 21 c the wiping cloth feeding apparatus 21 feeds a wiping cloth 24 for wiping the surface of the metal roll 11 a at a definite feeding rate while maintaining a definite tension the feeding gears 21 c are composed of a pair of adjustable driving spur gears holding the wiping cloth 24 and apply a feeding force to the wiping cloth 24 the cleaning liquid supply apparatus 22 has a pump 22 a and a supply head 22 b the cleaning liquid supply.