Abstract: A conveyor system of the type which may be utilized with an apparatus comprising a plurality of treatment areas such as an oven system containing a proofer for conditioning dough and a baking oven downstream of the proofer for baking the conditioned dough. A plurality of carrying pans are attached to a conveyor that is continuously directed through the proofer and baking oven in a serpentine path. The residence time for a pan within either the proofer or the baking oven can be varied by a conveyor length adjustment system that functions to provide changes in length of the conveyor in the proofer and in the baking oven. The conveyor system comprises movable sprocket assemblies positioned within the proofer and within the oven. The sprocket assemblies are movable in equal and opposite directions for respective length adjustment of the conveyor within the proofer and the oven.