The technology of parallel processing: parallel processing architectures and VLSI hardware (vol. 1)

The invention relates in the first instance to apparatus for dispensing granular material, for example plastics granules dosed with a coloring agent. Granular material and the coloring agent are located in supply hoppers and metering means feed predetermined metered quantities to a mixing device which supplies the dosed material to a supply hopper. The apparatus is arranged to operate when the level of dosed material in the supply hopper falls below a predetermined level, whereupon actuation of the metering means causes automatic replenishment to that level.