Rotary Core-oven
When properly constructed, this oven consists of a fireplace suitably located for supplying sufficient heat without burning the cores, and the oven structure is limited to the diameter of the rotating shelves, which are affixed to a central shaft, the lower end of which rests in a step, its vertical position being secured by a suitable contrivance at the roof. The latter, like the outer walls, must be no farther from the rotating shelves than is absolutely necessary. By this means quicker drying is obtained than would occur if unnecessary space had to be heated. The shelves may be either plain or grate, and as wide apart as will accommodate the class of cores to be dried. By this admirable contrivance the process of drying cores is materially facilitated, as the core-maker stands at the door, outside and away from the heat and gas, simply rotating the shelves in order to place within or carry away his cores. See OVENS.