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US 5,626,300 AGranted
Disc refiner with conical ribbon feeder
AssigneeAndritz Sprout-Bauer, Inc.
InventorGregory R. Kohler
Life of this patent
Estimating the term…
Abstract
A feeder assembly for lignocellulosic chip refiner has a conical core having a major diameter end and a minor diameter end. A helically coiled ribbon is supported by and extends longitudinally in spaced relation with the core. The ribbon is defined by turns of increasing diameter extending from the minor to the major diameter end of the core. A conical feed housing surrounds the ribbon.
Claims15
A refiner for defibrating lignocellulosic feed material comprising:
- a rotatable disc having a working face including a radially inner first inlet surface and a radially outer first grinding surface;
- a second inlet surface juxtaposed with said first inlet surface, thereby forming an inlet gap which has an inlet entrance;
- a second grinding surface juxtaposed with said first grinding surface, thereby forming a grinding gap extending substantially radially outwardly from said inlet gap;
- a shaft connected to said disc for rotating the disc about a rotation axis;
- a feed assembly including a feed mechanism supported for rotation about said rotation axis and a feed housing surrounding the feed mechanism, to advance feed material toward the face of said disc and into said inlet gap;
- means for receiving feed material and directing said feed material to said feed assembly;
- said feed mechanism including a substantially helical ribbon defined by coiled turns, the turns having an increasing diameter form one end of the feed mechanism remote from the disc face to another end of the feed mechanism at said face such that the perimeter of the turn at the greatest diameter of the ribbon, is situated at the entrance to said inlet gap;
- and
- said feed housing enlarges toward the face of said disc and closely surrounds said ribbon.
6 more elements
A refiner for defibrating lignocellulosic material comprising:
- a rotatable disc having a working face including a radially inner first inlet surface and a radially outer first grinding surface;
- a second inlet surface juxtaposed with said first inlet surface, thereby forming an inlet gap which has an inlet entrance;
- a second grinding surface juxtaposed with said first grinding surface, thereby forming a grinding gap extending substantially radially outwardly from said inlet gap;
- a shaft connected to said disc for rotating the disc about a rotation axis;
- a feed assembly including a feed mechanism supported for rotation about said rotation axis and a feed housing surrounding the feed mechanism, to advance feed material toward the face of said disc and into said inlet gap;
- means for receiving feed material and directing said feed material to said feed assembly;
- wherein said feed mechanism includes an elongated core having a first end remote from said face and a second end at said face, and a helically coiled ribbon supported by and extending longitudinally in spaced relation with the core, the ribbon defined by turns having an increasing in diameter along the core toward said face;
- and
- wherein said feed housing includes a conical portion closely surrounding the ribbon and an opening remote from said face through which feed material is directed into the ribbon by said means for receiving and directing.
6 more elements
Dependencies are inferred from the claim text.