Patent ID: 8143558

Claim:
An apparatus useful for printing, comprising: a heating first roll including a first outer surface; a heating second roll including a second outer surface; a third roll including a third outer surface; a temperature sensor for sensing the temperature of the third outer surface; a belt supported on the first roll and the second roll and disposed between the first outer surface and the third outer surface, the belt including an inner surface and an outer surface; a nip between the third outer surface and the outer surface of the belt at which the belt heats media which include a surface, marking material on the surface and an interface between the surface and the marking material; and a positioning device coupled to the second roll, the positioning device being operable to move the second roll relative to the outer surface of the belt to change a wrap length of the belt on the second outer surface, based on the temperature of the third outer surface, to maintain a substantially constant temperature at the interface between the surface and the marking material.