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AssigneeSunds Defibrator AB
InventorRolf B. Reinhall
Estimating the term…
A method and apparatus is provided for conjoint or simultaneous adjustment of the gap spaces of the inner and outer grinding zones of a pulp refiner apparatus in a single step. The inner grinding zone is generally radially oriented, and merges into an outer inclined grinding zone. Pulp stock to be ground is introduced into a central inlet position and is accelerated through the inner and outer grinding zones by centrifugal forces generated by a pair of grinding members which rotate relative to one and other. The opposed surfaces of the relatively rotating members each carry a plurality of concentric rows of teeth, and the gap spacing of the inner grinding zone is defined between adjacent surfaces of the teeth. The adjacent teeth defining the inner grinding zone are arranged so that adjustment of the gap space of the outer grinding zone simultaneously controls the gap spacing of the inner grinding zone without the need for separate adjustment. Retarding rings are provided adjacent to the concentric rows of teeth to prevent pulp from by-passing the grinding spaces between adjacent teeth.
In a refiner apparatus for refining pulp stock, said apparatus including a pair of opposed grinding members relatively rotatable to one another around an axis of rotation, said opposed grinding members defining a first inner grinding zone having a gap space defined by the distance between said opposed grinding members in the region proximate to said first grinding zone, said opposed grinding members further defining a second outer grinding zone having a gap spacing defined by the distance between said opposed grinding members in the region proximate to said second grinding zone, said first grinding zone merging with said second grinding zone which is oriented at an inclined angle relative to said first grinding zone, said first and second grinding zones providing a continuous passageway for pulp stock propelled therethrough by centrifugal forces generated by said relatively rotatable grinding members, and means for introducing said pulp stock into said first grinding zone, the improvement comprising:
In a refiner apparatus for refining pulp stock, said apparatus including a pair of opposed grinding members relatively rotatable to one another along an axis of rotation, said opposed grinding members defining a first inner grinding zone having a gap space defined by the distance between said opposed grinding members in the region proximate to said first grinding zone, said opposed grinding members further defining a second outer grinding zone having a gap spacing defined by the distance between said opposed grinding members in the region proximate to said second grinding zone, said first grinding zone merging with said second grinding zone which is oriented at an inclined angle relative to said first grinding zone, said first and second grinding zones providing a continuous passageway for pulp stock propelled therethrough by centrifugal forces generated by said relatively rotatable grinding members, and means for introducing said pulp stock into said first grinding zone, the improvement comprising:
A method of refining pulp stock in a continuous grinding space defined between a pair of opposed grinding members relatively rotatable around an axis of rotation, said grinding space including a first inner grinding zone defined between opposed surfaces of a plurality of adjacent teeth extending into said grinding space from said opposed grinding members, said first inner grinding zone merging into a second outer grinding zone oriented at an inclinded angle relative to said first inner grinding zone, and in which said pulp material is introduced into said first grinding zone and is propelled outwardly through said first and second grinding zones by centrifugal forces generated by the relative rotation of said opposed grinding members, the steps of said method comprising:
Dependencies are inferred from the claim text.