Abstract: A thermal processing chamber having an endless conveyor belt providing a level surface for placement of products for thermal processing in the chamber. Thermal processing is completed through a combination of convection from impingement by a stream of thermally charged gas against the product and conduction between the conveyor belt and the product. The endless conveyor belt comprises a plurality of plates forming a flat, horizontal surface, each plate having a set of male and female linking elements, for linking with an adjacent plate so as to prevent misalignment of the plates.