Refiner plates with injector inlet

  • US 6,402,071 B1
  • Filed: 11/23/1999
  • Issued: 06/11/2002
  • Est. Priority Date: 11/23/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A refiner for refining lignocellulosic material comprising first and second, relatively rotating, opposed refiner plates, the plates defining a refining gap disposed therebetween, the first refiner plate being rotatable in a direction of rotation, each of the refiner plates having radially inner and outer edges and an inlet zone extending radially outward from the inner edge, the inlet zone of the first refiner plate having radially inner and outer portions, the inner portion including a plurality of curved breaker bars, each of the breaker bars having an inner end disposed adjacent the inner edge, an outer end disposed adjacent the outer portion, and a leading edge extending from the inner end to the outer end, each of the breaker bars curving in a direction which is opposite to the direction of rotation from the inner end to the outer end, the leading edge having a feeding angle α

  • at any given point along the leading edge, the feeding angle α

    being defined by the angle between the leading edge at a given point and a radial line passing through the point, a feeding angle α

    1 at a point adjacent the front end of the breaker bar having a value between 0° and

    30° and

    a feeding angle α

    2 at a point adjacent the outer end having a value between 60° and

    90°

    .

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