A platen apparatus includes a housing having multiple vents; a turbine wheel rotatably attached to a rear section of the housing, the wheel having a circular body and a circumferential face without a coating thereon, the body includes vanes, each vane being a hole which extends through the body from one side to an opposing side of the wheel; a support belt engaged in tension about the circumferential face of the wheel; and the rear section of the housing is at least partially open so that a portion of the circumferential face of the wheel is exposed outside the housing. The vanes are arranged adjacent to the vents, and each provide a flow channel through which air is drawn in from a first side of the housing through the wheel body and released at a second, opposite side of the housing.

Cleaning water CW is supplied to the outer surface of a draining roll 10 from a pipe 70 arranged above the draining roll 10 that is in pressure contact with a contact roll 8 via a polishing belt PB. Accordingly, the cleaning water CW adheres evenly to the outer surface of the draining roll 10 in the longitudinal direction along with the rotation of the draining roll 10. Then, the cleaning water CW sufficiently adhering to the outer peripheral surface of the draining roll 10 is carried to a contact portion 90 between the draining roll 10 and the polishing belt PB, and cleans the abrasive surface of the polishing belt PB. As a result, it is possible to well reduce the occurrence of uneven cleaning on the abrasive surface, and to further improve the polishing effects of a polishing apparatus 1.

Cleaning water CW is supplied to the outer surface of a draining roll 10 from a pipe 70 arranged above the draining roll 10 that is in pressure contact with a contact roll 8 via a polishing belt PB. Accordingly, the cleaning water CW adheres evenly to the outer surface of the draining roll 10 in the longitudinal direction along with the rotation of the draining roll 10. Then, the cleaning water CW sufficiently adhering to the outer peripheral surface of the draining roll 10 is carried to a contact portion 90 between the draining roll 10 and the polishing belt PB, and cleans the abrasive surface of the polishing belt PB. As a result, it is possible to well reduce the occurrence of uneven cleaning on the abrasive surface, and to further improve the polishing effects of a polishing apparatus 1.

A platen apparatus includes a housing having multiple vents; a wheel rotatably attached to a rear section of the housing, the wheel having a circular body and a circumferential face without a coating thereon, the circumferential face of the wheel comprising a metal material having thermal dissipation properties; a support belt engaged in tension about the circumferential face of the wheel; and the rear section of the housing is at least partially open so that a portion of the circumferential face of the wheel is exposed outside the housing. The direct contact between the support belt and the metal material of the circumferential face is configured to remove heat away from the support belt.

A platen apparatus includes a housing having multiple vents; a wheel rotatably attached to a rear section of the housing, the wheel having a circular body and a circumferential face without a coating thereon, the circumferential face of the wheel comprising a metal material having thermal dissipation properties; a support belt engaged in tension about the circumferential face of the wheel; and the rear section of the housing is at least partially open so that a portion of the circumferential face of the wheel is exposed outside the housing. The direct contact between the support belt and the metal material of the circumferential face is configured to remove heat away from the support belt.