Abstract: Apparatus for the volumetric dispensing of powder and introducing the same in predetermined doses into hollow objects. A drum is mounted for continuous rotation around the vertical axis of a shaft. An annular channel for the reception of powder is disposed about the drum coaxially thereof, the drum carrying a plurality of stations for the reception of hollow objects so as to position the objects vertically with their open ends upwardly. Between the annular channel and each article receiving station, by means of purely mechanical mechanisms, there are provided and controlled a powder retaining probe of the type which can be subjected to sub-atmospheric pressure, carried in a moveable manner upon the drum. The volumetric powder dose determining and dispensing apparatus of the invention is particularly adapted for the handling of explosive powder.

Abstract: In a process for the manufacture of cyanuric acid by heating urea at a temperature above its melting point, an aqueous solution of urea is sprayed onto granules of crude cyanuric acid, recycled externally, and heated at a temperature of 220.degree.-280.degree. C. in a heat exchange zone heated by the walls thereof. A rotor in the device comprising a tubular shaft on which hollow discs are mounted, and in which a heat-transfer fluid circulates, is also employed to heat the material to the manufacture cyanuric acid in high yields.