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An oven for continuous cooking of products carried upon a open mesh wire conveyor provides the impingement of a cooking vapor from air discharge structure having ports arrayed above and below the conveyor. The discharge ports extend laterally of the conveyor and communicate with upper and lower plen

An oven for continuous cooking of products carried upon a open mesh wire conveyor provides the impingement of a cooking vapor from air discharge structure having ports arrayed above and below the conveyor. The discharge ports extend laterally of the conveyor and communicate with upper and lower plenums each charged by blower fans which draw cooking vapor from low pressure corridors alongside the product conveyor. Gas, electric or thermo fluid heaters are disposed in the corridors. The discharge ports are in slot form disposed about the apex of a Vee shaped riser spaced from the adjacent riser to provide a low pressure flow channel communicating with the corridors giving a rapid velocity change of the cooking vapor from turbulent to a less turbulent flow. The distance for vapor travel between the upper discharge ports and the product carrying conveyor is variable. Temperature and moisture content of the process vapor can be changed to suit cooking conditions.

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[ What is claimed:] [1.] A high speed air impingement oven for food preparation, comprisingan outer housing equipped with a product inlet and a product outlet;conveyor means serving to convey products through the oven housing, the product inlet and the product outlet for subjecting food products to

[ What is claimed:] [1.] A high speed air impingement oven for food preparation, comprisingan outer housing equipped with a product inlet and a product outlet;conveyor means serving to convey products through the oven housing, the product inlet and the product outlet for subjecting food products to treatment with a continuously circulating, high speed, food treatment vapor;an inner housing arranged within said outer housing and dimensioned laterally so that the sidewalls thereof are spaced apart from the adjacent sidewalls of said outer housing so as to define longitudinally extending low pressure circulation corridors along each sidewall of said inner housing;said conveyor means including a vapor pervious conveyor belt upon which food products are posited for treatment;said inner housing comprising upper and lower chambers disposed above and below said conveyor belt, respectively;fan means for said upper and lower chambers arranged so that the inlets communicate with said low pressure circulation corridors and the fan outlets communicate with the interior of said upper and lower chambers serving to create therein a zone of relatively higher pressure;nozzle arrays extending transversely of and projecting towards said conveyor belt from said upper and lower chambers;each nozzle array forming a wall of one of said upper and lower chambers serving to discharge the food treatment vapor there through above and below said conveyor belt to impinge upon products carried thereupon;each nozzle array including a plurality of parallel, risers spaced apart along said belt,each riser tapering from a base portion to a substantially narrower distal portion extending laterally of and proximate to said conveyor belt, said distal portion having a line of vapor discharge slots therein, andvapor heating means in said housings arranged in the path of vapor circulation from the discharge slots to the circulation fan means serving to heat and maintain a controlled temperature of the cooking vapor discharged from said discharge slots.