Textiles: knitting – Fabrics or articles – Articles
Patent
1998-01-02
2000-07-04
Worrell, Danny
Textiles: knitting
Fabrics or articles
Articles
66192, 66195, 66202, D04B 2502
Patent
active
060821442
ABSTRACT:
A packing material is constructed with an inner core and an outer circular sheath having compressible and extendible filler yarns which help reduce keystoning of the packing material when bent around corners or curved surfaces. More specifically, the sheath is formed from a plurality of base yarns and a plurality of filler yarns, wherein the yarns are either knit by a circular warp-knitting method or braided. The filler yarns are positioned at predetermined locations within the sheath structure and configured in their construction so as to give the sheath a predetermined geometric configuration when knitted. In the preferred construction, four filler yarns are arranged in a square configuration to give the packing material a generally square configuration. The key feature of the present invention is that the filler yarns comprise yarns which are extendible and compressible in a longitudinal direction. The filler yarns preferably comprise a chain-stitched knit yarn construction which is naturally extendible and compressible in a longitudinal direction. The knit filler yarns are introduced into the warp in partially extended condition, i.e. under back tension, and will thereafter be at least partially compressible and extendible in a longitudinal direction in the finished packing material. In this regard, the sheath is at least partially longitudinally compressible along an inner radius when the packing material is bent around a curved surface. The resulting effect of the compression along the inner radius is a reduction of "keystoning" of the packing material.
REFERENCES:
patent: 239287 (1881-03-01), Winana
patent: 1771912 (1930-07-01), Blaisdell
patent: 3124032 (1964-03-01), Webster et al.
patent: 4123830 (1978-11-01), Matsuda et al.
patent: 4838043 (1989-06-01), Jencks
patent: 4977759 (1990-12-01), Jencks
patent: 5512709 (1996-04-01), Jencks
patent: 5603514 (1997-02-01), Jencks
Akopian Vladimir
Jencks Andrew D.
New England Overseas Corporation
Worrell Danny
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