Refiner plate with chip conditioning inlet
First Claim
1. A refiner for refining lignocellulosic material including opposed first and second refiner plates, at least the first refiner plate rotating about an axis, each of the refiner plates having a plurality of refiner plate segments, each refiner plate segment defining a radially inner refining region comprising:
- radially inner and outer ends;
a plurality of substantially radially disposed bars, each of the bars including a top surface; and
a plurality of grooves alternating with the bars, each of the grooves defining a base having a radial length, the base of at least one of the grooves having a variable base profile along the radial length of the base;
wherein at a first radial position between the inner and outer ends the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has a high point, whereby the base profile at the first radial position forces lignocellulosic material from the second refiner plate onto the first refiner plate.
1 Assignment
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Accused Products
Abstract
A refiner plate segment for a refiner including opposed first and second refiner plates has radially inner and outer ends, multiple radially disposed bars, and grooves alternating with the bars. The base of at least one of the grooves has a variable base profile along the radial length of the base such that in at least one radial position between the inner and outer ends of the refiner plate segment, the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has an oppositely disposed high point. The high point in the base profile forces lignocellulosic material carried on the second refiner plate onto the first refiner plate.
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Citations
22 Claims
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1. A refiner for refining lignocellulosic material including opposed first and second refiner plates, at least the first refiner plate rotating about an axis, each of the refiner plates having a plurality of refiner plate segments, each refiner plate segment defining a radially inner refining region comprising:
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radially inner and outer ends;
a plurality of substantially radially disposed bars, each of the bars including a top surface; and
a plurality of grooves alternating with the bars, each of the grooves defining a base having a radial length, the base of at least one of the grooves having a variable base profile along the radial length of the base;
wherein at a first radial position between the inner and outer ends the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has a high point, whereby the base profile at the first radial position forces lignocellulosic material from the second refiner plate onto the first refiner plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A refiner for refining lignocellulosic material including opposed first and second refiner plates, at least the first refiner plate rotating about an axis, each of the refiner plates having a plurality of refiner plate segments, at least a first set of the refiner plate segments defining a radially inner refining region, each of the refiner plate segments in the first set comprising:
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radially inner and outer ends;
a plurality of substantially radially disposed bars; and
a plurality of grooves alternating with the bars, each of the grooves defining a base having a radial length, the base of at least one of the grooves having a variable base profile along the radial length of the base;
wherein at a first radial position the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has an opposed high point, whereby the base profile at the first radial position forces lignocellulosic material from the second refiner plate onto the first refiner plate. - View Dependent Claims (14, 15)
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16. A refiner plate segment for a refiner having opposed first and second refiner plates, each refiner plate segment comprising:
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radially inner and outer ends;
a plurality of substantially radially disposed bars; and
a plurality of grooves alternating with the bars, each of the grooves defining a base having a radial length, the base of at least one of the grooves having a variable base profile along the radial length of the base;
wherein in at least one radial position between the inner and outer ends of the refiner plate segments, the base profile of the refiner plate segments of the first refiner plate has a low point and the base profile of the refiner plate segments of the second refiner plate has an oppositely disposed high point. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification