Roasting oven

1. An oven comprising:

an oven chamber, comprising side walls, a floor and a ceiling, the oven chamber having a plurality of heating levels;

at least one heating element cavity external to and communicating with the oven chamber, the heating element cavity comprising at least one heating element;

a plurality of item holders arranged vertically in multiple levels of at least one item holder, each item holder being rotatable about an axis in the oven chamber;

a plurality of air inlets into the oven chamber from the heating element cavity, each of the multiple levels of rotating item holders being supplied directly with heated air from a corresponding one of the air inlets, and at least one outlet for return air from the oven chamber into the heating element cavity; and

an air distributor comprising a plurality of fans corresponding to each air inlet, the air distributor circulating air from the heating element cavity to the oven chamber.

2. The oven of claim 1 wherein the outlet from the oven chamber to the heating element cavity is provided with a filter and the air distributor is provided with a fan to draw air past the filter into proximity with the heating elements.

3. The oven of claim 1 wherein each level of item holder comprises at least two racks upon which items are roasted.

4. The oven of claim 1 wherein each item holder is adapted to support a single item to be roasted.

5. The oven of claim 4 wherein the air inlets to the oven chamber are provided with vanes to direct the heated air from the cavity directly onto the rotating item holders.

6. The oven of claim 5 wherein the vanes direct the heated air upwardly onto the rotating holders.

7. The oven of claim 2 wherein the plurality of fans of the air distributor are coaxially engaged on a fan drive mechanism.

8. An oven comprising:

an oven chamber comprising side walls, a floor and a ceiling, the oven chamber having a plurality of heating levels;

at least one heating element cavity external to and communicating with the oven chamber, the heating element cavity comprising at least one heating element;

a plurality of air inlets into the oven chamber from the heating element cavity corresponding to the heating levels in the oven chamber and at least one outlet for return air from the oven chamber into the heating element cavity;

an air distributor comprising at least one fan circulating air from the heating element cavity to the oven chamber; and

a rotatable centrally mounted item holding frame detachably mounted in each oven chamber including at least one item holder mounted to a rotatable shaft in each oven chamber, the item holding frames being centrally mounted in the oven chambers within a shaft assembly in the oven chambers of the oven, the shaft assembly being provided with a rack drive mechanism which is engageable with a drive key associated with the rotatable shafts to rotate the shafts, at least one fan coaxially engaging on a fan drive mechanism whereby the fan drive mechanism is coupled to the rack drive mechanism and both are driven from a single motor.

9. The oven of claim 8 wherein the number of fans in the air distributor is equal to the number heating elements and the number of heating levels.

10. An oven comprising:

an oven chamber comprising side walls, a floor and a ceiling, the oven chamber having a plurality of heating levels;

at least one heating element cavity external to and communicating with the oven chamber, the heating element cavity comprising at least one heating element;

a plurality of item holders vertically arranged in multiple levels of at least one item holder, each item holder being rotatable about an axis in the oven chamber;

a plurality of air inlets into the oven chamber from the heating element cavity corresponding to the heating levels in the oven chamber and at least one outlet for return air from the oven chamber into the heating element cavity; each air inlet to the oven chamber directing the heated air from the heating element cavity directly onto a corresponding level of rotating item holder;

an air distributor comprises a plurality of fans corresponding to each air inlet, the air distributor circulating air from the heating element cavity to the oven chamber;

a water inlet to supply water to the oven chamber, a secondary heating element located in the floor to heat the floor to generate stream from water in the oven chamber; and

a controller to operate the water inlet to project water onto the heated oven floor when steam is required.

11. The oven of claim 10 , wherein the water outlet is located centrally in the oven floor.

12. An oven comprising:

an oven chamber, the oven chamber comprising side walls, a floor and a ceiling, the oven chamber having a plurality of heating levels;

at least one heating element cavity external to and communicating with the oven chamber, each heating element cavity comprising at least one heating element;

a plurality of air inlets into the oven chamber from the heating element cavity corresponding to the heating levels in the oven chamber and at least one outlet for return air from the oven chamber into the heating element cavity;

an air distributor comprises a plurality of fans corresponding to each air inlet, the air distributor circulating air from the heating element cavity to the oven chamber; and

a rotatable centrally mounted item holding frame detachably mounted in the oven chamber including the multiple levels of at least one item holder mounted to a rotatable shaft, the rotatable shaft being mounted to a pivotally mounted loading arm, the loading arm operable between a baking position where the frame is wholly within the oven chamber and a loading and unloading position where the item frame is wholly outside of the oven chamber.

13. The oven of claim 12 wherein the item holding frame is centrally mounted in the baking chamber within a shaft assembly in the baking chamber of the oven, the item holder frame comprising a plurality of item holders, each item holder being adapted to support a single item to be roasted.

14. The oven of claim 12 wherein a shaft assembly for mounting the item holding frame in the baking chamber is provided with a rack drive mechanism which is engageable with a drive key associated with the rotatable shaft to rotate the rotatable shaft.

15. The oven of claim 13 wherein the fan drive mechanism is coupled to the rack drive mechanism and both are driven from a single motor.

16. The oven of claim 12 further comprising an oven door, the oven door opening on a travel path and the loading arm transports the item holding frame passed the oven door to the loading and unloading position.

17. The oven of claim 12 wherein the oven chamber has a circular cross section and the radius of the item racks on the item holder frame is between 60 to 85% of the diameter of the baking chamber.

18. The oven of claim 12 wherein heated air enters the oven chamber from the heating element cavity at multiple levels, the number of levels corresponding to the number of levels of item holders on the frame.

19. The oven of claim 12 wherein the item holder comprises a frame connection arm connectible to the rotatable shaft and two item support arms connected in a substantially U-shaped configuration, one item support arm being connected to the frame connection arm whereby the two item support arms form a concave shape which receives the item to be roasted.

20. An oven comprising:

at least two oven chambers, each oven chamber comprising side walls, a floor and a ceiling, each oven chamber having a plurality of heating levels;

at least one heating element cavity external to and communicating with each oven chamber, each heating element cavity comprising at least one heating element;

a plurality of air inlets into each oven chamber from the heating element cavity corresponding to the heating levels in each oven chamber and at least one outlet for return air from each oven chamber into the heating element cavity; and

an air distributor comprises a plurality of fans corresponding to each air inlet, the air distributor circulating air from the heating element cavity to each oven chamber, a rotatable centrally mounted item holding frame detachably mounted in each oven chamber including at least one item holder mounted to a rotatable shaft in each oven chamber, the item holding frames being centrally mounted in each oven chamber within a shaft assembly in each oven chamber, the shaft assembly being provided with a rack drive mechanism which is engageable with a drive key associated with the rotatable shafts to rotate the rotatable shafts, the plurality of fans coaxially engaging on a fan drive mechanism whereby the fan drive mechanism is coupled to the rack drive mechanism and both are driven from a single motor.

21. The oven of claim 17 wherein the plurality of fans of the air distributor are coaxially engaged on a fan drive mechanism.