Patent ID: 7137802

Claim:
Apparatus for processing thermoplastic synthetic material that has to be recycled, comprising a first and a second receptacle for the material to be processed, in which receptacles tools circulating around vertical axes are provided for mixing and heating the material, wherein at least two tools each circulate in different levels one above the other, and the material reaches the second receptacle that is connected to an evacuating means from the first receptacle through a connecting conduit, and wherein the first receptacle has above an intake opening for the material to be processed, which opening is disposed at a higher level than highermost tools circulating within this receptacle, and a discharge opening of the second receptacle is disposed at least substantially at the level of lowermost tools circulating in this receptacle, and a mouth of the connecting conduit in the second receptacle is disposed at a higher level than the tools circulating in this receptacle, and wherein the processed material is carried off the second receptacle through the discharge opening by means of at least one screw, whereby this receptacle is vacuum-tightly closed, and the first receptacle is also connected to an evacuating means, wherein to the intake opening of the first receptacle a sluice is connected and wherein in both receptacles the tools are mounted on disc-shaped tool carriers disposed one above the other, and wherein in each one of the two receptacles at least one temperature sensor is provided for each level of the circulating tools, which sensor is disposed higher than the level associated to it.