Abstract: A rotoformer includes a rotary drum for dispensing drops or strips of a free-flowing compound onto a cooling belt. A heating hood overlies the drum and is swingable to an inoperative position to afford access to the drum. The hood is mounted for swinging movement on a vertical axis which is offset from a horizontal axis of rotation of the drum so that when in its inoperative position, no part of the hood overlies the cooling belt. A part of the hood is relocatable, e.g., by being swingable upwardly, or by being detached, to permit the hood to be swung to its inoperative position.

Abstract: Impurities are removed from pieces of sulfur by dropping the pieces directly into a bath of heated liquid sulfur disposed in a vessel. The liquid sulfur is heated externally of the vessel and conveyed thereto. The sulfur pieces melt in the bath. A movable element, such as a rotary screen drum or conveyor blades for example, is disposed in the bath for agitating the bath and entraining the impurities.