Method and apparatus for sorting recycled material
DCFirst Claim
1. A material separation screen, comprising:
- a frame;
a first shaft and a second shaft mounted adjacent to and substantially parallel with one another on the frame;
a first compound disc mounted on the first shaft and a second compound disc mounted on the second shaft, each compound disc having a primary disc with a first outside perimeter, and a secondary disc abutted against a lateral side of the primary disc having a second outside perimeter smaller than the first outside perimeter;
wherein the first and second compound discs are spaced apart from adjacent compound discs on their respective shafts; and
wherein the first compound disc on the first shaft is aligned with the second compound disc on the second shaft such that they overlap to form a stair-shaped gap between them.
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Abstract
A compound disc is used to eliminate a secondary slot normally formed between adjacent shafts of a material separation screen. The compound disc includes a primary disc joined to an associated secondary disc. The primary disc and the secondary disc each have the same shape but the secondary disc has a smaller outside perimeter and is wider. The primary disc and associated secondary disc are formed from a unitary piece of rubber. The compound discs are interleaved with oppositely aligned compound discs on adjacent shafts. In other words, the large disc is positioned on a shaft to align with a smaller disc on an adjacent shaft. The oppositely aligned and alternating arrangement between the large discs and small discs reduce problems that exist in screens that use in-line multi-sided discs.
62 Citations
26 Claims
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1. A material separation screen, comprising:
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a frame; a first shaft and a second shaft mounted adjacent to and substantially parallel with one another on the frame; a first compound disc mounted on the first shaft and a second compound disc mounted on the second shaft, each compound disc having a primary disc with a first outside perimeter, and a secondary disc abutted against a lateral side of the primary disc having a second outside perimeter smaller than the first outside perimeter; wherein the first and second compound discs are spaced apart from adjacent compound discs on their respective shafts; and wherein the first compound disc on the first shaft is aligned with the second compound disc on the second shaft such that they overlap to form a stair-shaped gap between them. - View Dependent Claims (2, 3, 4)
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5. Multiple discs for a material separation screen, comprising:
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primary discs on a first shaft having a first outside perimeter; secondary discs on the first shaft having a second outside perimeter smaller than the first outside perimeter; each one of the primary discs on the first shaft abutted with one of the secondary discs on the first shaft on adjacent lateral sides to form multiple unitary compound discs, the multiple unitary compound discs on a second parallel adjacent shaft aligned with compound discs on the first shaft so that the compound discs on the adjacent shafts overlap to form a non-linear gap; and wherein adjacent multiple unitary compound discs on each shaft are spaced apart from each other. - View Dependent Claims (6, 7)
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8. A screen for separating material, comprising:
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a frame; a first shaft mounted on the frame; a second shaft mounted on the frame adjacent to the first shaft in a substantially parallel relationship therewith; a first set of compound discs mounted on the first shaft, the first set of compound discs each having a primary disc with a smaller secondary disc abutting with a side of the primary disc, wherein adjacent compound discs of the first set are spaced apart from each other; a second set of compound discs mounted on the second shaft, the second set of compound discs each having a primary disc with a smaller secondary disc extending from a side of the primary disc, wherein adjacent compound discs of the second set are spaced apart from each other; and the first set of compound discs on the first shaft in offset alignment with the second set of compound discs on the second shaft such that each disc in the first set of compound discs overlaps with an adjacent disc in the second set of discs. - View Dependent Claims (9, 10, 11, 12)
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13. A method for separating material on a screen having multiple shafts, comprising:
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providing multiple primary discs and multiple secondary discs abutted together and each having an outside perimeters, wherein the outside perimeters of the primary discs are larger than the outside perimeters of the secondary discs; mounting the primary discs and the secondary discs on the shafts in alternating order where at least some of either the primary discs or secondary discs are co-linearly aligned with at least some of the secondary discs from adjacent shafts such that a non-linear gap is formed between the discs of one shaft and the discs of another shaft, and wherein adjacent non-attached discs are spaced apart from each other; rotating the shafts in the same direction; and dropping materials on the screen so that shaft rotation causes the material to be pushed by the discs along the screen while at the same time separating the materials according to size. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A disc for a material separation screen, comprising:
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a primary disc having a first outside perimeter; and a secondary disc having a second outside perimeter smaller than the first outside perimeter; the primary disc and the secondary disc formed from a unitary piece of molded rubber or plastic an abutted together; the primary disc located on a first shaft spaced apart from adjacent primary discs and maintaining a substantially constant spacing with a first adjacent disc on a second shaft during rotation; and the secondary disc shaped to maintain a substantially constant spacing with a second adjacent disc on the second shaft during rotation. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A disc for a material separation screen, comprising:
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a primary disc on a first shaft having a first outside perimeter shaped to maintain a substantially constant spacing with a first adjacent disc on a second shaft during rotation; a secondary disc on the first shaft having a second outside perimeter smaller than the first outside perimeter and shaped to maintain a substantially constant spacing with a second adjacent disc on the second shaft during rotation; and the primary disc and secondary disc in abutting along lateral sides thereof and each disc being made from a plastic or rubber type material that grips certain materials while allowing other materials to fall off the screen.
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26. A compound disc for a material separation screen comprising:
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a primary disc having a first outside perimeter and two lateral sides; one and only one secondary disc formed on and extending from each lateral side of the primary disc, said secondary discs each having a second outside perimeter smaller than the first outside perimeter; and wherein said primary disc and one of said secondary discs are configured to abut with a primary disc and a secondary disc on a second compound disc to form a non-linear gap between them.
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Specification