Refiner plates with logarithmic spiral bars
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United States of America Patent
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Aug 5, 2008
Grant Date -
Aug 5, 2004
app pub date -
Apr 22, 2003
filing date -
Apr 25, 2002
priority date (Note) -
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Abstract
A special shape of bars on refining discs or plate segments (54) of a rotating disc refiner (10) is disclosed including a plurality of bars (76) generally extending outwards toward the outer end of the disk across its surface, arranged in a single, two or more radial zones (64, 66, 68), the plurality of the bars within a zone being curved with the shape of a logarithmic spiral. Disc refiners including such refining discs are also disclosed.
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