Patent ID: 6036027
Filing Date: 2000-03-14
Classification: B04C,D21D

Abstract:
A hydrocyclone for concentrating fibers in a stock comprising:a substantially cylindrical chamber defining an interior volume and having a top and a bottom and at least one inlet adjacent the top, wherein an axis is defined between the top of the cylindrical chamber and the bottom of the cylindrical chamber, the inlet positioned to inject stock tangent to the cylindrical chamber so as to cause the stock to rotate within the chamber and a portion of the cylindrical chamber forming a conical section co-joined and extending downwardly from the cylindrical chamber, the conical section tapering inwardly to at least one outlet adjacent the bottom;an upper outlet centered about the chamber axis at the top of the cylindrical chamber,the inlet causing the fluid to rotate about said chamber axis; anda means for generating ultrasonic energy and introducing ultrasonic energy into the interior volume of the substantially cylindrical chamber, the means for generating ultrasonic energy being positioned about the upper outlet to project ultrasonic energy radially outward of the axis, the means for generating and introducing being adapted to influence the movement of fibers entrained in the fluid.