Patent ID: 8118479
Filing Date: 2012-02-21
Classification: B01F,F26B,F28F

Abstract:
1. An apparatus comprising a trough with two rotatably arranged shafts extending alongside each other, which shafts are each provided with paddles which are spaced apart in axial direction with an intermediate distance, which extend substantially in a radial plane with respect to the shafts and which extend in circumferential direction over at least a part of the circumference and which are at least partly wedge-shaped in circumferential direction, while upon opposite rotation of the shafts successive paddles mesh alternately, thereby forming a gap narrowing again and again, which is pitchless in the axial direction, wherein the per shaft successive paddles in the axial direction are staggered relative to each other in the circumferential direction through an angle of about 15° at a maximum.