Patent ID: 6902314

Claim:
Apparatus for processing a fluid mass comprising: a. an upwardly open vessel or trough for receiving a fluid mass which falls down into the vessel or trough; b. a mixing arrangement arranged in the vessel or trough, said mixing arrangement comprising horizontally arranged rotatable cylinder means provided with spiral means and a discharge for processed mass, the cylinder means comprising at least two cylinders arranged for rotation counter to each other; wherein c. each respective spiral means extends immediately from the surface of a cylinder core of the cylinder means in a direction towards a wall portion of the vessel or trough to the vicinity of the wall portion; d. the cylinder means being arranged in a parallel disposition whereby the spiral means intermesh at least in pairs; e. first channels defined at said cylinder means, by a core surface of said cylinder means, an opposite wall section of the vessel or trough and adjacent ones of the spiral means provided at the cylinder means and wherein; f. further channels including constrictions are defined by the intermeshing spiral means; g. which further channels extend in an inclined horizontal manner and have a smaller cross section than the cross section of the first channels.