Abstract: A conveyor includes elongated and curved first and second structural beams. Each beam includes a plurality of support tabs projecting outwardly therefrom in opposite directions and the tabs support a corresponding endless belt along the entire length thereof. The two belts operatively connect to at least one drive mechanism and define a conveying path from a first end of the beams to the opposite end. The beams are oriented such that the spacing between the two belts remains relatively uniform along the conveying path. The size, shape, orientation, and spacing of the support tabs cause the endless belts to twist in orientation, preferably by about 180° between entrance and exit ends of the conveying path. During driving of the belts, the belts cause an article held therebetween to change angular orientation as the belts convey the article from the entrance to the exit of the conveying path.