In addition to the intensive Cross-Sectional mixing of the MCT, scientifically proven adequate for carbon black dispersion and for final mixing, the new Transfermix III provides Longitudinal mixing, as is required under an Internal Mixer operating on a shortened cycle. The new concept comprises a rotatable shell around a stationary vertical column, driven like a rotary kiln without a costly geartrain. With diameters from 1 to 3 metres, even a squat design provides large enough cooling surfaces for mixing at sufficiently low temperatures to improve carbon black dispersion and, lower down, to incorporate curatives without scorch. Feeding is into a drop-shaft in the column, without any ramfeeders, and pelletisation occurs on exit round the bottom circumference. No man-power is required and computer control is possible on all parameters.