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Refiner segment

  • US 4,953,796 A
  • Filed: 06/27/1989
  • Issued: 09/04/1990
  • Est. Priority Date: 02/25/1987
  • Status: Expired due to Term
First Claim
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1. An improved disc refiner for refining fibrous materials, said disc refiner having a refiner segment formed with a pattern including a plurality of radially disposed bars having an upper surface, a plurality of grooves radially disposed intermediate said bars, and a plurality of flow restrictions traversing said grooves between adjacent ones of said bars and extending upward in said grooves to said upper surfaces of said adjacent ones of said bars, at least one of said bars including connecting means for enabling direct communication between a pair of said grooves adjacent said at least one of said bars.

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