Patent ID: 6607153
Filing Date: 2003-08-19
Classification: B02C,D21D

Abstract:
A refiner plate segment for refining lignocellulosic material, comprising a refining zone having:a plurality of substantially radially disposed bars, each of said bars having a top surface, a leading surface and a trailing surface, said plurality of bars defining a plurality of bar pairs comprising a leading bar and a trailing bar; a plurality of grooves alternating with said bars, each of said grooves defining a base; at least one dam extending laterally across a said groove intermediate said leading bar and said trailing bar of at least one bar pair, said dam comprising a first portion extending from said trailing surface of said leading bar and a second portion extending from said leading surface of said trailing bar, said first and second portions of said dam each having a top surface, wherein said top surface of said second portion is disposed substantially co-planar with said top surface of said trailing bar and said top surface of said first portion is disposed intermediate said top surface of said leading bar and said base of said groove.