Indexing method and apparatus for an electroheating technology oven

1. An oven comprising:

an inlet elevator having multiple receiving bays for receiving a piece to be heated in the oven where the receiving bays are stacked vertically and the elevator is configured to move up or down to align a receiving bay;

a mandrel having multiple shelves to correspond a shelf to a bay of the inlet elevator, each shelf configured to support a piece received from the inlet elevator, the mandrel configured to rotate each piece on a shelf between a loading position, a baking position, and an unloading position;

an outlet elevator having multiple receiving bays for unloading a piece heated in the oven, the unloading bays are stacked vertically and the elevator is configured to move up or down to align an unloading bay with a material handling system moving the heated pieces; and

an electroheat generator configured to heat at least one of the pieces when the pieces are in the baking position.

2. The oven of claim 1 , wherein the inlet elevator and the outlet elevator are the same elevator but it is an inlet elevator when it is receiving pieces from a material handling system and loading them onto the shelves and the elevator is an outlet elevator when it is unloading heated pieces to a material handling system.

3. The oven of claim 1 , wherein the mandrel rotates approximately 120° when moving from the loading position to the baking position and another 120° in the same rotational direction when moving from the baking position to the unloading position.

4. The oven of claim 3 , wherein each shelf is configured to support three pieces at once, one in the loading position, one in the baking position and one in the unloading position.

5. The oven of claim 4 , wherein the mandrel is configured to rotate a piece from one position to another position about every 5 minutes.

6. The oven of claim 1 , wherein the inlet elevator is configured to load the pieces substantially simultaneously from the receiving bays to the shelves.

7. The oven of claim 1 , wherein the mandrel is configured to rotate to achieve more than one baking position.

8. The oven of claim 1 , wherein the mandrel has 10 shelves.

9. The oven of claim 1 , further comprising a programmable controller configured to control the movement of the mandrel and inlet and outlet elevators.

10. The oven of claim 9 , further comprising sensors operatively connected to the controller for sensing a location of a piece.

11. The oven of claim 1 , wherein the inlet and outlet elevators further comprise an interrupted drum configured to move a piece out of a bay when the drum rotates.

12. The oven of claim 1 , further comprising a heating unit for subjecting the pieces to convection heat.