Bakery oven

Claim 1

A bakery oven which comprises a chamber defined by a pair of generally vertical walls, a roof, and a floor which define an entry aperture at or near one end and an exit at or near the other end, at least one of the walls having means which define a plurality of hot air supply orifices, the orifices being arranged in horizontally-spaced and vertically-spaced groups and each group of orifices includes a plurality of orifices vertically or horizontally-spaced from one another, wherein said orifices are horizontal slots formed by upper and lower louver members each louver member having a horizontal plate or flange extending into the chamber whereby inflowing air is guided in operation of the oven to travel substantially horizontally, and a selected one of the louver members of each pair of upper and lower louver members is slidable towards and away from the other louver member to allow adjustment of the width of the slot defined thereby, air supply ducts in at least one of said walls, comprising a first duct, an intermediate duct connected with said first duct, a heat exchanger positioned within said intermediate duct having an outlet, said exchanger outlet connected to a second duct whereby hot air is conveyed from the heat exchanger to the hot air supply orifices, said air supply ducts further comprise an under-floor duct and a vertical duct which includes two air duct branches, said under-floor duct being disposed under the floor and connecting with said vertical duct, one said air duct branch extending upwardly in one of said walls and the other said air duct branch extending upwardly in the other of said walls.