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Device for refining cellulose-containing material

  • US 5,040,736 A
  • Filed: 08/13/1990
  • Issued: 08/20/1991
  • Est. Priority Date: 09/19/1989
  • Status: Expired due to Term
First Claim
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1. Apparatus for refining lignocellulose-containing material comprising a first rotatable shaft, a first refiner disc mounted on said first rotatable shaft, a first refining element mounted on said first refiner disc, a second rotatable shaft, a second refiner disc mounted on said second rotatable shaft, a second refiner element mounted on said second refiner disc, said first and second refiner discs being mounted for relative rotation with respect to each other in opposite directions with said first and second refiner elements in face-to-face relationship thereby defining a refiner gap therebetween, feed means for feeding said lignocellulose-containing material to said refiner gap, said feed means including a plurality of feed passages passing through said first refiner disc into said refiner gap at a location proximate to said first rotatable shaft for passage outwardly through said refiner gap, said first refiner disc including a plurality of feeding wings corresponding to said plurality of feed passages, with each of said plurality of feeding winds being located at least partially in front of each of said corresponding plurality of feed passages so as to accelerate said lignocellulose-containing material passing through said plurality of feed passages into said refiner gap, and said second refiner disc including a substantially smooth surface portion at a location thereon juxtaposed with said location of said plurality of feed passages in said first refiner disc.

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