Sound absorbent fabric sleeves

Details Sound absorbent fabric sleeves Sound absorbent fabric sleeves

1997-07-17

1999-02-02

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 363, 428373, 81 9, 442189, 442190, 442191, 442200, B29D 2300

Patent

active

058662162

ABSTRACT:
Sound absorbent fabric sleeves are formed from interthreaded, preferably braided, resilient, staple spun polymer yarns. Bulk and softness needed for sound absorption is provided through the staple fibers and resiliency desired for expansion capability and shape maintenance is provided through a resilient monofilament core. The yarns are sometimes referred to as dref mono/poly yarns. The sleeves can be heat set to better resist unraveling and maintain tubular shape. The yarns inherently resist fraying. A pressure sensitive or other adhesive layer or an elastomeric material or other material layer can be provided around all or part of the outsides of the sleeves. Spring clips can be provided extending through the tubes between the yarns to assist in mounting the sleeves or to modify them for uses other than sound absorption.

REFERENCES:
patent: 3828544 (1974-08-01), Alker
patent: 4754685 (1988-07-01), Kite et al.
patent: 4836080 (1989-06-01), Kite, III et al.
patent: 4870887 (1989-10-01), Tresslar et al.
patent: 4989422 (1991-02-01), Barlow et al.
patent: 5082297 (1992-01-01), Flasher
patent: 5107623 (1992-04-01), Weil
patent: 5186992 (1993-02-01), Kite, III
patent: 5197370 (1993-03-01), Gladfelter
"The Dref 2 Friction Spinning Machine", Fehrer AG, Linz, Austria, 28 pages, Aug. 1995.
"The Dref 3 Friction Spinning Machine", Fehrer AG, Linz, Austria, 20 pages, Sep. 1995.

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