At the outlet of the oven a Take-off conveyor transfer the product from wire-mesh or band of the oven towards the Cooling conveyor. For an effective cooling this is long one time and a half or two times the length of the oven, in ambient room; considered from the more sophisticated food technology as necessary for a proper and lasting preservation of the packaged product. The conveyor belt can be of wire-mesh or high resistance plastic, with automatic tracking to avoid any side skiddingA forced cooling, possible to reduce the length of the conveyor, can be achieved, whether not in air conditioned room, either by hoods with centrifugal fan blowed air ducts or by fans fitted in the final part of the conveyor.