Refiner plate with gradually changing geometry
First Claim
Patent Images
1. A refiner plate segment comprising:
- an outer periphery;
an inner arc distally disposed from the outer periphery;
a first lateral edge;
a second lateral edge distally disposed from the first lateral edge; and
a refining surface disposed between the outer periphery and the inner arc comprising;
a pattern of bars and grooves disposed between the outer periphery and the inner arc in multiple bands, wherein the pattern of bars and grooves in each band of the multiple bands has a density, wherein each bar has ends,wherein the pattern of bars and grooves in a first band of the multiple bands disposed closer to the inner arc has a lesser density than a pattern of bars and grooves in an adjacent band of the multiple bands disposed closer to the outer periphery as measured along a radial line configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner; and
a transition zone, wherein the transition zone is arranged at an angle of between 20° and
85°
relative to the radial line, wherein the transition zone borders a side of each of the multiple bands, wherein the density of the pattern of bars and grooves increases within each of the multiple bands as measured from a point on each multiple band nearer the inner arc to a point on each multiple band nearer the outer periphery, and wherein the transition zone is distributed in a continuous curved line or a continuous straight line across a structure selected from the group consisting of;
a full surface dam, a subsurface dam, dams connecting at least some of the ends of the bars in the first band to at least some of the bars in the adjacent band, and Y-junctions connecting bars between the first band and the adjacent band.
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Accused Products
Abstract
The present disclosure describes a refiner plate segment with one or more continuous, generally spiraling transition zones. A transition zone spans from an area near the inner portion of the plate, near the breaker bar area, and extends toward an area near the periphery of the plate at an angle. A tangent line to the transition zone intersecting a radial line forms this angle. The radial line is formed by a line perpendicular to the outer periphery passing through the center point of the center of plate rotation.
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Citations
26 Claims
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1. A refiner plate segment comprising:
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an outer periphery; an inner arc distally disposed from the outer periphery; a first lateral edge; a second lateral edge distally disposed from the first lateral edge; and a refining surface disposed between the outer periphery and the inner arc comprising; a pattern of bars and grooves disposed between the outer periphery and the inner arc in multiple bands, wherein the pattern of bars and grooves in each band of the multiple bands has a density, wherein each bar has ends, wherein the pattern of bars and grooves in a first band of the multiple bands disposed closer to the inner arc has a lesser density than a pattern of bars and grooves in an adjacent band of the multiple bands disposed closer to the outer periphery as measured along a radial line configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner; and a transition zone, wherein the transition zone is arranged at an angle of between 20° and
85°
relative to the radial line, wherein the transition zone borders a side of each of the multiple bands, wherein the density of the pattern of bars and grooves increases within each of the multiple bands as measured from a point on each multiple band nearer the inner arc to a point on each multiple band nearer the outer periphery, and wherein the transition zone is distributed in a continuous curved line or a continuous straight line across a structure selected from the group consisting of;
a full surface dam, a subsurface dam, dams connecting at least some of the ends of the bars in the first band to at least some of the bars in the adjacent band, and Y-junctions connecting bars between the first band and the adjacent band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 18, 23, 24, 25, 26)
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14. A refiner plate segment comprising:
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a refining zone having a pattern of bars and grooves wherein each bar has ends; and transition zones disposed on the refining zone to create X shapes, wherein diamond shapes are created in the refining zone by the X shapes created by the transition zones, and wherein a density of bars in the pattern of bars and grooves within each diamond shape increases radially from a first diamond shape nearer to an inner arc to an adjacent diamond shape further from the inner arc, wherein the transition zone is distributed in a continuous curved line or a continuous straight line across a structure selected from the group consisting of;
a full surface dam, a subsurface dam, subsurface dams connecting at least some of the ends of the bars in the first diamond shape to at least some of the bars in the adjacent diamond shape, and Y-junctions connecting bars between the first diamond shape and the adjacent diamond shape.
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15. A refiner plate segment comprising:
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an outer periphery; an inner arc disposed across from the outer periphery; a first lateral edge; a second lateral edge disposed across from the first lateral edge; and a refining surface having a pattern of bars and grooves, wherein the refining surface is disposed between the inner arc and the outer periphery, the refining surface comprising; multiple transition zones, wherein the transition zones are parallelly disposed to adjacent transition zones, wherein each transition zone is distributed in a line across a structure selected from the group consisting of;
a full surface dam, a subsurface dam, dams connecting at least some of the ends of the bars in the first band to at least some of the bars in the adjacent band, and Y-junctions connecting bars between the first band and the adjacent band, wherein the line spans the refining surface at an angle of between 20° and
85°
relative to a radial line passing through the refiner plate segment, wherein the radial line is configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner,wherein an area between adjacent transition zones forms a spiral band, wherein multiple adjacent transition zones form multiple spiral bands, wherein one or more bars span across two or more transition zones, wherein the pattern of bars has a density, wherein the transition zone is defined by an increase in density between a first spiral band of the multiple spiral bands disposed closer to the inner arc and an adjacent spiral band of the multiple spiral bands disposed further from the inner arc, and wherein the density increases within the multiple spiral bands from a point of each spiral band disposed closer to the first lateral edge to a point of the spiral band disposed closer to the second lateral edge. - View Dependent Claims (17)
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19. A refiner plate segment comprising:
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an outer periphery; an inner arc distally disposed from the outer periphery; a first lateral edge; a second lateral edge disposed across from the first lateral edge; and a refining surface having a first transition zone, a second transition zone, and a third transition zone, wherein each of the first transition zone, the second transition zone, and the third transition zone is distributed in a line across a structure on the refining surface selected from the group consisting of;
a full surface dam, a subsurface dam, dams connecting at least some of the ends of the bars in the first band to at least some of the bars in the adjacent band, and Y-junctions connecting bars between the first band and the adjacent band,wherein the first transition zone and the second transition zone are disposed between the outer periphery and the inner arc, wherein the second transition zone is parallel to the first transition zone and wherein the second transition zone is disposed radially outward from the first transition zone, wherein the first transition zone and second transition zone are arranged at an angle relative to a radial line extending from the inner arc to the outer periphery, wherein the radial line is configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner, and wherein an area between the first transition zone and a second transition zone defines a first band having a pattern of bars and grooves, wherein the bars have ends wherein the third transition zone is disposed between the outer periphery and the inner arc, wherein the third transition zone is parallel to the first transition zone and wherein the third transition zone is disposed radially outward from the second transition zone, wherein an area between the second transition zone and the third transition zone defines a second band having a pattern of bars and grooves, wherein the bars have ends, wherein the pattern of bars and grooves in the first band and the second band have a density, wherein the density of the pattern of bars and grooves in the second band is denser than the pattern of bars and grooves in the first band as measured along the radial line, wherein the first transition zone, the second transition zone, and the third transition zone are defined by an increase in density between the first band and the second band, wherein the density of the pattern of bars and grooves in the first band increases from an inner end of the first band to an outer end of the first band, the outer end of the first band being distally disposed from the inner end of the first band, and wherein the density of the pattern of bars and grooves in the second band increases from an inner end of the second band to an outer end of the second band, the outer end of the second band being distally disposed from the inner end of the second band. - View Dependent Claims (20, 21)
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22. A refiner plate segment comprising:
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an outer periphery; an inner arc distally disposed from the outer periphery; a first lateral edge; a second lateral edge disposed across from the first lateral edge; and a refining surface comprising; a pattern of bars and grooves disposed between the outer periphery and the inner arc in multiple bands, wherein the pattern of bars and grooves in each band of the multiple bands has a density, wherein the density of the pattern of bars and grooves in a first band of the multiple bands disposed closer to the inner arc has a lesser density than the density of the pattern of bars and grooves in an adjacent band of the multiple bands disposed closer to the outer periphery; a transition zone, wherein the transition zone is defined by an increase in density between the first band disposed closer to the inner arc and an adjacent band disposed further from the inner arc as measured along a radial line extending from the inner arc to the outer periphery, wherein the radial line is configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner wherein the transition zone is arranged at an angle of between 20° and
85°
relative to the radial line, wherein the transition zone borders a side of at least one of the multiple bands, wherein each transition zone is distributed in a line across a structure selected from the group consisting of;
a full surface dam, a subsurface dam, dams connecting at least some of the ends of the bars in the first band to at least some of the bars in the adjacent band, and Y-junctions connecting bars between the first band and the adjacent band, and wherein the pattern of bars and grooves becomes denser within at least one of the multiple bands as measured from the first lateral edge to a point of the refining surface nearest the outer periphery.
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Specification