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US 5,289,618 AGranted
Apparatus for making a nonwoven web
AssigneeNone recorded
InventorErnst Fehrer
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AssigneeNone recorded
InventorErnst Fehrer
Estimating the term…
An apparatus for making a nonwoven web has a carding drum (1), a continuously moving, air-permeable collecting surface member (2) for collecting fibers which fly in an entraining air stream from the carding drum (1), a suction box (4), connected to the collecting surface member (2), and a suction duct (3) extending between the collecting surface member and a peripheral portion of the carding drum (1) which is directly opposite to the collecting surface member (2). In order to ensure desirable conditions of flow in the suction duct (3), air supply passages (10, 11) extend over the working width of the carding drum (1) in the region in which the carding drum (1) is adjacent to leading and trailing suction duct walls (3a and 3b), with respect to the direction of rotation of the carding drum (1), and the air supply passag extend between the carding drum (1) and two drum guards (12 and 13), which respectively extend opposite to the direction of rotation of the drum from the leading duct wall (3a) and in the direction of rotation of the drum from the trailing duct wall (3b).
An apparatus for making a nonwoven web, comprising
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Characterised by the method of forming fleeces or layers, e.g. reorientation of fibres: the fibres being orientated, e.g. in parallel
Carding machines: air draught arrangements
Lap-forming devices not integral with machines specified above
Characterised by the method of forming fleeces or layers, e.g. reorientation of fibres: the fibres being randomly arranged
Term ended 1 Dec 2012 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to an apparatus for making a nonwoven web comprising a carding drum, a continuously moving, air-permeable collecting surface member for collecting fibers which fly in an entraining air stream from the carding drum, a suction box, which is connected to the collecting surface member on that side thereof which is opposite to the carding drum, and a suction duct between the carding drum and the collecting surface.
2. Description of the Prior Art
FIG. 1 is a schematic longitudinal sectional view showing an apparatus according to the invention for making a nonwoben web.
FIG. 2 is a fragmentary enlarged sectional view taken on a plane through the suction duct of that apparatus.
An illustrative embodiment of the invention will now be explained with reference to the drawing.
The illustrated apparatus for making a nonwoven web essentially comprises a carding drum 1, which is provided with a seratted surface, a continuously moving, air-permeable collecting surface member 2, which is radially spaced from the carding drum 1, and a suction duct 3, which extends between the collecting surface member 2 and a portion of the periphery of the carding drum 1 which is directly opposite to the collecting surface member 2. A suction box 4 is provided on that side of the collecting surface member 2 which is opposite to the carding drum. That suction box causes the entraining air to be sucked from the suction duct 3 through the collecting surface member 2.
The fibrous fleece is fed in a usual manner by a conveying belt 5 to a charging station 8 associated with the carding drum 1. That charging station 8 consists of a table 6 and a feed roller 7. The fleece is disintegrated into individual fibers as it is fed. The charging station 8 is succeeded in the direction of rotation of the carding drum 1 by pairs of worker and clearer rolls 9, by which the fibrous layer on the carding drum is made more uniform; that fibrous layer is subsequently delivered to the suction duct 3.