Wenderoth, Lind & Ponack
Mixing device and method
 Mixing material around an inner agitator in a mixing vessel is urged upward and outward by rotating the inner agitator in one direction. Simultaneously, mixing material around or adjacent an outer agitator is urged downward and inward by rotating the outer agitator in the opposite direction. Consequently, the mixing materials urged upward and downward are caused to be circulated by convection in the mixing vessel and the mixing materials urged outward and inward are caused to collide between the inner and outer agitator, thus forming a high-pressure region between the inner and outer agitator. The mixing materials are mashed in the high-pressure region and well mixed in a short time at high efficiency without being agglutinated to the inner agitator. 
Kajima Corporation
B
B01F
inventional
Takao Makoto
Inoue Saito