Patent ID: 8871307

Claim:
A method for manufacturing a cylindrical member which comprises a mandrel and a coating formed on the peripheral surface thereof, the method comprising a step of: vertically or substantially vertically holding a mandrel with an upper holding shaft and a lower holding shaft so as to be coaxial with a central axis of a ring-shaped coating head having an annular slit opening in an inner peripheral surface, and discharging a coating liquid through the annular slit while vertically or substantially vertically moving up the mandrel with respect to the ring-shaped coating head to form the coating on an outer peripheral surface of the mandrel, wherein a circular cleaning blade is rotatably mounted around the lower holding shaft, wherein the step includes the steps of: (1) forming the coating of the coating liquid up to a lower end of a coating region on the outer peripheral surface of the mandrel, and then stopping discharge of the coating liquid through the annular slit; (2) moving up the lower holding shaft with respect to the ring-shaped coating head so that the cleaning blade passes through the annular slit to clean the annular slit; and (3) moving down the lower holding shaft with respect to the ring-shaped coating head so that the cleaning blade passes through the annular slit to clean the annular slit; in this order, and wherein the method further comprises a step of rotating the cleaning blade around the lower holding shaft to clean the cleaning blade after at least one of the steps (2) and (3).