D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 1/30 (2006.01) B01F 7/00 (2006.01) B02C 7/14 (2006.01) D21B 1/14 (2006.01) D21D 1/20 (2006.01) D21D 1/22 (2006.01) B01F 3/12 (2006.01) B01F 3/14 (2006.01) B01F 5/00 (2006.01)
Patent
CA 2065269
2065269 9107228 PCTABS00005 A method and apparatus is provided for conjoint or simultaneous adjustment of the gap spaces (32, 33) of the inner and outer grinding zones of a pulp refiner apparatus in a single step. The inner grinding zone (32) is generally radially oriented and merges into an outer inclined grinding zone (33). Pulp stock to be ground is introduced into a central inlet position (21) and is accelerated through the inner and outer grinding zones by centrifugal forces generated by a pair of grinding members (11-14) which rotate relative to one another. The opposed surfaces of the relatively rotating members each carry a plurality of concentric rows of teeth (34), and the gap spacing (32) of the inner grinding zone is defined between adjacent surfaces of the teeth. The adjacent teeth (34) defining the inner grinding zone are arranged so that adjustment of the gap space (33) of the outer grinding zone simultaneously controls the gap spacing (32) of the inner grinding zone without the need for separate adjustment. Retarding rings (62, 63) are provided adjacent to the concentric rows of teeth (34) to prevent pulp from by-passing the grinding spaces between adjacent teeth.
Reinhall Rolf B.
Fetherstonhaugh & Co.
Sunds Defibrator Industries Aktiebolag
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