US 4,592,115 AGranted

Apparatus and process for separating cellulose fluff fibers from waste fibrous material

AssigneeMo och Domsjo AB

InventorSten Holmstrom

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Abstract

Apparatus is provided for separating cellulose fluff fibers from waste fibrous material resulting from the manufacture of absorbent products from cellulose fluff fibers, comprising: an apertured cylindrical separator disposed in a housing and having a central passage in flow connection with the inlet; the cylindrical separator having apertures therethrough large enough to permit cellulose fluff fibers to pass therethrough but small enough to screen out larger non-fluff material from the waste fibrous material; means in connection with the first outlet for controlling flow therethrough of air and entrained waste fibrous material, for providing a balance between flow rate and differential pressure across the apertured separator sufficient to prevent blockage of the apertrues in the separator by waste fibrous material too large to pass through while permitting cellulose fluff fibers to pass through.

Apparatus for separating cellulose fluff fibers from waste fibrous material resulting from the manufacture of absorbent products from cellulose fluff fibers, comprising:

(1) means for disintegrating the waste fibrous material into particulate form small enough to entrain in air;
(2) means for entraining particles of waste fibrous material in air;
(3) means for conveying the air with entrained particles of waste fibrous material into a cellulose fluff fiber separator;
(4) the cellulose fluff fiber separator comprising a cylindrical housing having an inlet at one end for air and entrained waste fibrous material particles;
(5) an apertured cylindrical separator disposed in the housing and having a central passage in flow connection with the inlet;
and spaced from the internal wall of the housing so as to define an annular chamber therebetween;
(6) a first outlet in the housing in flow connection with the central passage of the cylindrical separator;
(7) a second outlet in the housing in flow connection with the annular chamber;
(8) the cylindrical separator having apertures therethrough large enough to permit cellulose fluff fibers to pass therethrough but small enough to screen out larger non-fluff material from the waste fibrous material;
(9) means for drawing air and entrained cellulose fluff fibers passing through the apertures from the housing through the second outlet;
(10) means for drawing air and entrained waste fibrous material not passing through the apertures from the housing through the first outlet;
and
(11) means in connection with the first outlet for controlling flow therethrough of air and entrained waste fibrous material, for providing a balance between flow rate and differential pressure across the apertured separator sufficient to prevent blockage of the apertures in the separator by waste fibrous material too large to pass through while permitting cellulose fluff fibers to pass through.

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Abstract

Claims5