This machine provides for automatic cumulative weighing of any required amount of carbon black or white filler before automatically transporting the compound to the mixer charging inlet. Up to 26 types of powder can be pre-set. The hopper capacity can be varied to match the mixer capacity and batch cycle time. Two options are offered, one for paper bags and one for flexible containers. The former can incorporate an automatic paper bag emptier and disposer, providing for a totally clean process.