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An air impingement oven having a conveyor belt assembly for moving food through a heat treatment passage. The air impingement oven has a fan, a supply duct, a plenum and a number of jet fingers being disposed above the conveyor belt assembly. The jet fingers have a base portion having a number of or

An air impingement oven having a conveyor belt assembly for moving food through a heat treatment passage. The air impingement oven has a fan, a supply duct, a plenum and a number of jet fingers being disposed above the conveyor belt assembly. The jet fingers have a base portion having a number of orifices for directing the impingement air onto the food. The orifices have an improved configuration. The improved configuration intensifies the airflow on the food to penetrate heat into the food surface thereby improving heat transfer. The improved configuration reduces a cooking time of the food in the air impingement oven.

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1. An air impingement oven comprising:a conveyor that conveys a food product between a first port and a second port; an air impingement assembly disposed between said first port and said second port, said air impingement assembly arranged to provide a plurality of jets of air in a direction toward s

1. An air impingement oven comprising:a conveyor that conveys a food product between a first port and a second port; an air impingement assembly disposed between said first port and said second port, said air impingement assembly arranged to provide a plurality of jets of air in a direction toward said food product, said air for convection heating of said food product; a fan blower; and a heater for heating said air, wherein said air impingement assembly comprises an air direction plate having a plurality of different shaped orifices disposed therein suitable for providing a plurality of different jets of heated air for cooking said food product. 2. The air impingement oven of claim 1, wherein said shape is selected from the group consisting of a circular shaped orifice, an “X” shaped orifice, a substantially “O” shaped orifice, an elliptical shaped orifice, a first “O” shaped orifice being surrounded by a plurality of second “O” shaped orifices, a cross shaped orifice having a first end, a second end, a third end, and a fourth end, wherein each of said first through fourth ends have an enlarged substantially circular tipped shape, a first “O” shaped orifice being in a second “O” shaped orifice in concentric relation, a round shaped orifice, and any combinations thereof.3. The air impingement oven of claim 1, wherein said heated air has a temperature, said temperature being in a range that includes about 400 degrees Fahrenheit to about 700 degrees Fahrenheit.4. The air impingement oven of claim 1, further comprising a second heater, said second heater for heating said food product opposite said plurality of air jets.5. The air impingement oven of claim 4, wherein said second heater is disposed a distance under said conveyor.6. The air impingement oven of claim 4, wherein said second heater is an infrared heater, said infrared heater operating at a temperature of between about 1400 degrees Fahrenheit to about 1800 degrees Fahrenheit.7. The air impingement oven of claim 1, further comprising a screen, said screen being disposed beneath said plurality of jets of air, said screen for balancing a pressure of said heated air exiting said air impingement assembly.8. The air impingement oven of claim 1, wherein said plurality of orifices are arranged in an array, said array for showering said food product on said conveyor with a first stream of air and a second stream of air, said first stream of air for sweeping said air across said food product and said second stream of air for delivering a concentrated stream of air to a top of said food product.9. An air impingement oven comprising:a conveyor belt that conveys a food product between a first port and a second port; an air impingement assembly having a plurality of jet fingers, said plurality of jet fingers being disposed between said first port and said second port and arranged to provide a plurality of jets of air on said food product; a fan blower being connected to said plurality of jet fingers; and a heater for heating said air, wherein said air impingement assembly has a plurality of orifices having a plurality of shapes for emitting said heated air through said plurality of orifices, said plurality of shapes being capable of both penetrating heated air into a top said of said food product and sweeping heated air across said food product. 10. The air impingement oven of claim 9, wherein said plurality of shapes are selected from the group consisting of: a circular shaped orifice, an “X” shaped orifice, an “O” shaped orifice, an elliptical shaped orifice, a first “O” shaped orifice being surrounded by a plurality of second “O” shaped orifices, a first concentric circular shaped orifice in a second circular shaped orifice, a cross shaped orifice having a first end, a second end, a third end, and a fourth end, wherein each of said first through fourth ends has an enlarged substantially circular tipped shape relative to a remainder of said cross shaped orifice, a round shaped orifice, and any combinations thereof.11. The air impingement oven of claim 9, wherein some of said shapes are at least circular shaped orifices having a diameter in a range between about 0.25 inches to 0.75 inches.12. The air impingement oven of claim 10, wherein said plurality of orifices have at least two different shapes arranged in a first row and in a second row.13. The air impingement oven of claim 12, wherein said orifices comprises at least a first “X” shaped orifice and a second “O” shaped orifice, said first “X” shaped orifice emitting a first heated air stream, said second “O” shaped orifice emitting a second heated air stream, wherein said first heated air stream penetrates heat into a top side of said food product thereby cooking a centermost portion of said food product and said second heated air stream for sweeping said second heated air stream across said food product thereby cooking an outermost first lateral side and an outermost second lateral side of said food product relative to said center most portion of said food product.14. The air impingement oven of claim 13, wherein said first heated air stream and said second heated air stream both have a temperature in a range between about 400 degrees Fahrenheit to about 700 degrees Fahrenheit.15. The air impingement oven of claim 9, further comprising a screen, said screen being disposed beneath said plurality of jet fingers, said screen for balancing a pressure of said air exiting said plurality of jet fingers.16. The air impingement oven of claim 10, wherein said orifices comprise at least one first “O” shaped orifice having a first diameter, and a second “O” shaped orifice having a second diameter, wherein said first diameter is greater than said second diameter, wherein said second “O” shaped orifice emits a second heated air stream, wherein said second heated air stream exits said second “O” shaped orifice at a relatively higher velocity relative to a first heated air stream exiting said first “O” shaped orifice.17. The air impingement oven of claim 10, wherein said plurality of shapes have at least one orifice of said plurality of orifices having a first slot being intersected by a second slot defining an intersection with a first end, a second end, a third end, and a fourth end, with each of the first through fourth ends having a bulbous shaped slot connected thereto.18. The air impingement oven of claim 17, further comprising a row of shaped orifices have at least one first “O” shaped orifice having a first diameter, and a second “O” shaped orifice having a second diameter, wherein said first diameter is greater than said second diameter, said second “O” shaped orifice emitting a second heated air stream, wherein said second heated air stream exits said second “O” shaped orifice at a relatively higher velocity relative to a first heated air stream exiting said first “O” shaped orifice.19. An air impingement oven comprising:a conveyor belt that conveys a food product between a first port and a second port; an air impingement assembly having a plurality of jet fingers, said plurality of jet fingers being disposed between said first port and said second port and arranged to provide a plurality of jets of air on said food product; a fan blower being connected to said plurality of jet fingers; a first heater for heating said air; and a second heater for heating a bottom of said food product, wherein said air impingement assembly has a plurality of orifices, each of said plurality of orifices having a plurality of shapes being suitable for said plurality of jet fingers emitting said heated air through said plurality of orifices, said plurality of shapes of said plurality of orifices for both penetrating heated air into a top of said food product and sweeping heated air across a side of said food product, wherein said plurality of shapes are selected from the group consisting of a circular shaped orifice, an “X” shaped orifice, an “O” shaped orifice, an elliptical shaped orifice, a first “O” shaped orifice being surrounded by a plurality of second “O” shaped orifices, a first concentric circular shaped orifice in a second circular shaped orifice, a cross shaped orifice having a first end, a second end, a third end, and a fourth end, wherein each of said first through fourth ends has an enlarged tipped shape relative to said cross shaped orifice, a round shaped orifice, and any combinations thereof. 20. An air impingement oven comprising:an air diverter plate having at least two differently shaped orifices; a conveyor belt that conveys a food product between a first port and a second port; an air impingement assembly having a plurality of jet fingers, said plurality of jet fingers being disposed between said first port and said second port and arranged to provide a plurality of jets of air on said food product through said air diverter plate; a fan blower being connected to said plurality of jet fingers; a first heater for heating said air; and a second heater for heating a bottom of said food product. 21. The air impingement oven of claim 20, wherein said at least two differently shaped orifices both penetrate heated air into a top of said food product and sweeping heated air across a side of said food product.22. The air impingement oven of claim 21, wherein said plurality of shapes are selected from the group consisting of a circular shaped orifice, an “X” shaped orifice, an “O” shaped orifice, an elliptical shaped orifice, a first “O” shaped orifice being surrounded by a plurality of second “O” shaped orifices, a first concentric circular shaped orifice in a second circular shaped orifice, a cross shaped orifice having a first end, a second end, a third end, and a fourth end, wherein each of said first through fourth ends has an enlarged tipped shape relative to said cross shaped orifice, a round shaped orifice, and any combinations thereof.23. The air impingement oven of claim 21, wherein said heated air has a temperature in a range that includes about 400 degrees Fahrenheit to about 700 degrees Fahrenheit.24. The air impingement oven of claim 21, wherein said second heater is disposed a distance under said conveyor.25. The air impingement oven of claim 24, wherein said second heater is an infrared heater operating at about 1400 degrees Fahrenheit to about 1800 degrees Fahrenheit.26. The air impingement oven of claim 21, further comprising a screen, said screen being disposed beneath said plurality of jets of air, said screen for balancing a pressure of said heated air exiting said air impingement assembly.