Cylindrical core for manufacturing endless belt-shaped body, and method for manufacturing endless belt-shaped body

A cylindrical core for manufacturing an endless belt-shaped body, the cylindrical core comprising:

• a cylindrical portion having two axial ends, an outer surface and an inner surface, the cylindrical portion including a cylinder whose cylindrical shape is not maintainable without support when the outer surface thereof is orthogonal to the direction of gravitational force;
• and
• flange portions that are detachably mounted on both axial ends of the cylindrical portion, wherein
• a coating film forming resin solution formed onto the outer surface or the inner surface of the cylindrical portion in a state in which the flange portions are mounted on the cylindrical portion, the coating film forming resin solution being adaptable to solidify when heated,
• the flange portions are configured to be removable following solidification of the coating film forming resin solution, thereby forming the endless belt, and
• wherein the flange portions have a step in a circumferential edge portion thereof, a radius of the step being less than a radius of the flange portions, a depth of the step being defined by a difference between the radius of the flange portions and the radius of the step, and the depth of the step of the flange portions is greater than a thickness of the cylindrical portion.