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Refiner disc

  • US 3,889,890 A
  • Filed: 01/21/1974
  • Issued: 06/17/1975
  • Est. Priority Date: 01/21/1974
  • Status: Expired due to Term
First Claim
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1. A feed end refining disc for use in a disc refiner comprising a plate-like body having an infeed face, an operating face, and at least one feed passage having an exit end at said operating face and an entrance end opening from said infeed face, characterized by means providing an irregular surface contour on said infeed face at least a portion of which is projected from said infeed face and arranged thereon adjacent and generally clear of said entrance end of said feed passage to inhibit material fed to said infeed face for movement through said feed passage from building up on said infeed face.

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