of the material, e.g. in layers or with mixing means above or at the end of the belt} [2013???01]B01F 13/0015. {Mixers having moving endless chains or belts, e.g. provided with paddles, as mixing elements} [2013???01]B01F 13/0016. {Movable or transportable mixing devices or plants} [2013???01]B01F 13/0018. . {Movable mixing devices, i.e. apt to be shifted or displaced from one place to another, e.