Patent ID: 7255472
Filing Date: 2007-08-14
Classification: B29B,B29C

Abstract:
1. A mixing device comprising a shaft ( 1 ), a front ring ( 2 ) and an end ring ( 3 ) connected to the shaft at a distance A from each other, and a loose mixing ring ( 4 ), which is freely rotatable and can be moved back and forth between the front ring and the end ring, wherein the front ring and the end ring in each case have at least one channel ( the mixing ring has a first region in which its inside diameter is large enough for it to be able to overlap with the region of smaller diameter of the front ring, has an adjoining second region, and also an adjoining third region, in which its inside diameter is large enough for it to be able to overlap with the region of smaller diameter of the end ring and the mixing ring is so long that, in its respective end positions, the other of the two rings ( characterized in that the mixing ring has on its inner side of the second region at least two channels (