F26B 11/188

Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles {the receptacle being a foraminous, perforated or open-structured drum or drum-like container, e.g. rotating around a substantially horizontal or vertical axis; the receptacle being multiple perforated drums, e.g. in superimposed arrangement the drum provided with internal subdivisions or multiple walls the subdivisions consisting of concentric perforated walls, or spiral-shaped walls}