Defibrator with ribs, beater plate, grate and beater bars
First Claim
1. A defibrator for manufacturing a fibrous product which comprises:
- a cylindrical housing which defines an inlet opening, an outlet opening, an inner surface, and a central axis,a plurality of ribs located on said inner surface of said cylindrical housing adjacent said inlet opening, said plurality of ribs each providing a curved surface facing inwardly of said cylindrical housing,a grate positioned across said outlet opening of said cylindrical housing, said grate being formed of parallel grate bars providing curved surfaces which face inwardly of said cylindrical housing,a stationary beater plate located externally of said cylindrical housing adjacent to said inlet opening, anda plurality of beater bars rotatably mounted within said cylindrical housing such that the axis of rotation thereof is offset relative to said central axis, said beater bars being capable of rotating past said inlet opening first towards said ribs and then towards said grate such that a fibrous product supplied to said inlet opening over said stationary beater bar will become defibrated within said cylindrical housing, said beater bars sweeping fibres off said curved surfaces of said parallel grate bars.
1 Assignment
0 Petitions
Accused Products
Abstract
A defibrator which makes it possible to distribute defibrated cellulosic fibers directly onto a forming wire (5) includes ribs (33) extending inside a cylindrical housing (24). The ribs have outer curved surfaces which direct fibers into an area (35) in which beater plates (25). A grate (37) in front of an outlet (30) from the circular housing (24) is arranged at the periphery (35) for the rotation of the beater plates (25). The grate has an interspace between grate bars only allowing fibers to pass through. Accordingly, agglomerates are returned into the working area of the beater plates (25). As the beater plates (25) act several times on agglomerates, it is ensured that only individual fibers pass through the grate (37). Accordingly, fibers are discharged directly onto the forming wire (5) from a discharge opening (2) of the defibrator (1). Preferably, the discharge opening (2) has a width corresponding to the width of the product to be formed on the forming wire (5).
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Citations
12 Claims
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1. A defibrator for manufacturing a fibrous product which comprises:
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a cylindrical housing which defines an inlet opening, an outlet opening, an inner surface, and a central axis, a plurality of ribs located on said inner surface of said cylindrical housing adjacent said inlet opening, said plurality of ribs each providing a curved surface facing inwardly of said cylindrical housing, a grate positioned across said outlet opening of said cylindrical housing, said grate being formed of parallel grate bars providing curved surfaces which face inwardly of said cylindrical housing, a stationary beater plate located externally of said cylindrical housing adjacent to said inlet opening, and a plurality of beater bars rotatably mounted within said cylindrical housing such that the axis of rotation thereof is offset relative to said central axis, said beater bars being capable of rotating past said inlet opening first towards said ribs and then towards said grate such that a fibrous product supplied to said inlet opening over said stationary beater bar will become defibrated within said cylindrical housing, said beater bars sweeping fibres off said curved surfaces of said parallel grate bars. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. The combination of a forming wire and a defibrator positioned above the forming wire to deposit fibers thereon, such defibrator comprising:
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a cylindrical housing, which defines an inlet opening, an outlet opening, an inner surface, and a central axis, a plurality of ribs located on said inner surface of said cylindrical housing adjacent said inlet opening, said plurality of ribs each providing a curved surface facing inwardly of said cylindrical housing, a grate positioned across said outlet opening of said cylindrical housing, said grate being formed of parallel grate bars providing curved surfaces which face inwardly of said cylindrical housing, a stationary beater plate located externally of said cylindrical housing adjacent to said inlet opening, and a plurality of beater bars rotatably mounted within said cylindrical housing such that the axis of rotation thereof is offset relative to said central axis, said beater bars being capable of rotating past said inlet opening first towards said ribs and then towards said grate such that a fibrous product supplied to said inlet opening over said stationary beater bar will become defibrated within said cylindrical housing, said beater bars sweeping fibres off said curved surfaces of said parallel grate bars. - View Dependent Claims (11, 12)
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Specification