D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
92/41
D21D 1/00 (2006.01) D21B 1/30 (2006.01) D21D 1/38 (2006.01)
Patent
CA 1245498
22626-219 ABSTRACT A system for mixing and refining pulp in which the raw material is conveyed into a cylindrical drum (10) and propelled therethrough in linear/ spiral direction by a co-axial rotor (26) comprising a plurality of mixing/ refining elements (40). The raw material is mixed and refined during the relative rotation between the rotor (26) and the drum (10) in a plurality of co-axially extending grinding areas (30) defined between rotatable grinding elements (40) on the rotor (26) and a facing grinding surface (28) on the interior of the drum while being simultaneously compressed therein and alternately decompressed in areas between the grinding areas (30). The rotatable elements (40) are adjustably mounted to the rotor (26) so as to vary the spacing between the grinding surface (28) on the interior of the drum and a rotatable grinding surface (42) on the grinding elements (40), while simultaneously adjusting the material feeding angle of the grinding areas (30). The adjustment can be achieved mechanically or by a hydraulic system during the operation of the apparatus to control and vary the flow of the pulp material as it passes through the grinding areas (30) to in- sure optimum and even mixing and refining of the pulp. Case 3317
496729
Johansson Johan I.
Reinhall Rolf B.
Fetherstonhaugh & Co.
Sunds Defibrator Aktiebolag
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