Post-baking or heating tunnel-type oven, in particular for food products

An oven for post-baking or heating various product in particular, for browning bakery bread, comprising a chamber open at both its ends and traversed by a conveyor carrying the products, a loading zone situated at one of said chamber ends, and infrared heating means provided in the said chamber, the conveyor being of the type allowing the passage of radiations, and said infrared heating means comprising a first series of infrared radiation emitting tubes arranged above the conveyor and a second series of infrared radiation emitting tubes situated under the conveyor portion on which the products are carried, and wherein said first and second series of radiation emitting tubes are longitudinally shifted with respect to each other such that said second series of radiation emitting tubes comprises a set of radiation emitting tubes located upstream of the chamber in the direction in which the products are conveyed through the chamber and outside thereof in the zone of loading the products on the conveyor, and wherein the other ones of said radiation emitting tubes which are located inside said chamber being adapted to emit short-wave infrared radiation, whereas said set of radiation emitting tubes located upstream and outside of said chamber are adapted to emit longer wave infrared radiation, such as medium-wave infrared radiation, which is less dazzling to persons loading the product on said conveyor in said loading zone than short-wave infrared radiation.