EP0263392A2
Expired / Lapsed
EP
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Tetraaxial woven fabrics and tetraaxial weaving machine thereof
Assignee: Meidai Chemical Co Ltd
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Filing: 1987-09-28
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Granted: —
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Expires: 2007-09-28
Abstract
Abstract The present invention provides a tetraaxial woven fabric in a novel texture exhibiting isotropic nature superior to that of the triaxial woven fabric and is composed of warp ends, weft ends, and intersecting upper and lower bias yarns running obliquely to the former two under such circumstances as increasing demand for triaxial woven fabrics having isotropic nature in strength and elongation requisite to improvement in strength and reduction of weight of FRP and supply of materials suited to the manufacture of aircrafts and autocars. Further, for the purpose of weaving and tetraaxial fabric as above, the present invention provides a bias yarn feeding device and bias yarn traversing device in a structure that has never been devised before, thereby enabling high speed weaving and production at low cost of a fabric exhibiting high isotropic characteristics in spite of reduced thickness thereof.
Inventors
- 👤 Kazumasa Ogahara
- 👤 Reijiro Tsuboi
- 👤 Michihiro Ogahara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
D; D03; D03D; D03D13/00; D03D13/002; D03D41/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A tetraaxial woven fabric characterized by being composed of tetra-layered and tetraaxially-directed yarns including warp ends (1), weft end (2), upper bias yarns (3), and lower bias yarns (4), the latter two (3), (4) being oblique with respect to the former two (1), (2), wherein upper yarns are interlaced with lower yarns while interposing the other two kinds of yarns therebetween so as to be united together.
Claim 2
Dependent Claim
67 words
A tetraaxial woven fabric characterized by being composed of tetra-layered and tetraaxially-directed yarns including warp ends (1), weft end (2), upper bias yarns (3), and lower bias yarns (4), the latter two (3), (4) being oblique with respect to the former two (1), (2), wherein upper yarns are interlaced with lower yarns while interposing the other two kinds of yarns therebetween so as to be united together.
Claim 3
Dependent Claim
44 words
A tetraaxial woven fabric as set forth in Claim 1, wherein the upper yarn corresponds to the upper bias yarn (3), the intermediate yarn to the lower bias yarn (4) and the warp end (1), and the lower yarn to the weft end (2).
Claim 4
Dependent Claim
43 words
A tetraaxial woven fabric as set forth in Claim 1, wherein the upper yarn corresponds to the warp end (1), the intermediate yarn to the upper bias yarn (3) and lower bias yarn (4), and the lower yarn to the weft end (2).
Claim 5
Dependent Claim
120 words
A tetraaxial weaving machine characterized by comprising: a bias yarn creel (A) carrying a large number of bobbins or a plurality of separate warp beams which are rotatably disposed on an imaginary plane substantially perpendicular to the direction along which the woven fabric is taken up; a bias yarn traversing device (B) for feeding intersecting yarns into an area of the substantially equal to the width of fabric to be woven; a warp feeding device (C) consisting of a warp beam (5) for feeding warp ends into the weaving area and a warp guide roll (16); a heddle device (D) for upper yarns; a weft picking device (E); a beating up reed device (F); and a product taking-up device (G).
Claim 6
Dependent Claim
120 words
A tetraaxial weaving machine characterized by comprising: a bias yarn creel (A) carrying a large number of bobbins or a plurality of separate warp beams which are rotatably disposed on an imaginary plane substantially perpendicular to the direction along which the woven fabric is taken up; a bias yarn traversing device (B) for feeding intersecting yarns into an area of the substantially equal to the width of fabric to be woven; a warp feeding device (C) consisting of a warp beam (5) for feeding warp ends into the weaving area and a warp guide roll (16); a heddle device (D) for upper yarns; a weft picking device (E); a beating up reed device (F); and a product taking-up device (G).
Claim 7
Dependent Claim
148 words
A tetraaxial weaving machine as set forth in Claim 4, wherein said bias yarn traversing device (B) is provided with: an upper bias yarn shifting roll (11) having screw-like grooves (23) with pitches in number equal to at least a half of the number of bias yarns fed into the weaving area throughout the width thereof; a lower bias yarn shifting roll (10) having screw-like grooves and being reverse to said upper roll at groove direction whereas the same at rotational direction, or the same at groove direction whereas reverse at rotational direction, both rolls being disposed above and below the weaving area; a guide bar (13) of the length substantially equal to the width of weaving area disposed fully close to said shifting rolls at the side facing said bias yarn creel (A); and bias yarn turning-over arms disposed on both ends of said guide bar (13).
Claim 8
Dependent Claim
72 words
A tetraaxial weaving machine as set forth in Claim 4, wherein said bias yarn traversing device (B) comprises guide pins (30) in number equal to at least the number of bias yarns fed into the weaving area, an endless chain (31) in the form of an ellipse rotating on a plane perpendicular to the width of weaving area; and chain sprockets (32), (33) disposed on both ends of said ellipse of chain.
Claim 9
Dependent Claim
196 words
A tetraaxial weaving machine as set forth in Claim 4, wherein said bias yarn traversing device (B) comprises: two sheets of upper grooved shifting plates (42a), (42b) disposed front and back, each having, at lower edge, yarn guide grooves (41) in number equal to at least a half of the total number of upper and lower bias yarns (3) fed into the weaving area throughout the width thereof and shifting the upper bias yarns right and left at a distance of one or more groove pitches; and similar two sheets of lower grooved shifting plates (43a), (43b) disposed front and back, each having, at upper edge, yarn guide grooves (41) and shifting the lower bias yarns (4) right and left at a distance of one or more groove pitches in the direction reverse to that of the former plates, the former two sheets and the latter two being disposed above and below the weaving area, respectively, and wherein a dividing guide (44) slightly shorter than said yarn guide groove part of upper and lower bias yarn shifting plates (42a), (43a) is disposed fully close to said plates at the side facing said bias yarn creel (A).
Claim 10
Dependent Claim
30 words
A tetraaxial weaving machine as set forth in Claim 4, wherein said heddle device (D) corresponds to a bias yarn pressing heddle (18) or needle heddle (27) for warp end.
References Cited (Backward Citations)
No citation records indexed.
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