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Refiner plate with chip conditioning inlet

  • US 6,616,078 B1
  • Filed: 11/27/2000
  • Issued: 09/09/2003
  • Est. Priority Date: 11/27/2000
  • Status: Expired due to Term
First Claim
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1. A refiner for refining lignocellulosic material including opposed first and second refiner plates, at least the first refiner plate rotating about an axis, each of the refiner plates having a plurality of refiner plate segments, each refiner plate segment defining a radially inner refining region comprising:

  • radially inner and outer ends;

    a plurality of substantially radially disposed bars, each of the bars including a top surface; and

    a plurality of grooves alternating with the bars, each of the grooves defining a base having a radial length, the base of at least one of the grooves having a variable base profile along the radial length of the base;

    wherein at a first radial position between the inner and outer ends the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has a high point, whereby the base profile at the first radial position forces lignocellulosic material from the second refiner plate onto the first refiner plate.

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