Textiles: weaving – Fabrics – Drier felts
Patent
1981-09-08
1983-08-23
Kee Chi, James
Textiles: weaving
Fabrics
Drier felts
139117, 139432, D03D 500, D03D 4742
Patent
active
043998410
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a method for manufacturing a woven fabric, in which weft thread loops are formed by at least one weft thread in at least one shed formed of warp threads, a device or apparatus on a loom for the performance of the method as well as a woven fabric manufactured according to the method.
A method for manufacturing a woven web has become known from Swiss Pat. No. 611,353, in which the weft thread is led from one side of the shed into this while forming a loop. On the other side of the shed, the weft thread loops are bound off by two auxiliary threads so that a very resistant fabric edge is obtained. This and similar methods, in which the weft thread is led in from one side, have the disadvantage that visibly different fabric edges are obtained.
SUMMARY OF THE INVENTION
It is an important object of the invention to create a method and a device on a loom for the manufacture of a woven fabric, which displays the advantage that two like fabric edges are obtained, which can no longer be distinguished optically.
The method of manufacturing a woven fabric according to the invention, in which weft thread loops are formed by at least one weft thread in at least one shed formed of warp threads, is manifested by the features that the weft thread is positioned to program for the weft introduction in warp direction within the warp width in the shed and before every beating of the reed is led out towards each shed side over the outermost warp thread while forming a loop extending in zig-zag shape, where it is bound off, retained, glued or fixed with itself or wit an auxiliary thread for the formation of the fabric edges.
The apparatus for the performance of the method contemplates that at least two weft introduction organs are arranged externally of the shed and engaging into the same, apart from the edge forming means arranged on a loom to each side of the fabric.
It is possible to lead the weft thread out first to the one side while forming a first loop and thereupon to lead it out to the other side while forming the second loop. This can take place with the arrangement of a weft thread introduction organ on each side of the shed. In that case, two fork-shaped needles can be used for pushing as well as also two hook-shaped needles for drawing. Advantageously, the weft thread is led out simultaneously to each side while forming two loops, for which in turn a hookshaped or a fork-shaped needle can be arranged on each shed side. Both weft thread introduction organs can also be present on the same shed side and together reach into the shed, wherein a fork-shaped needle forms the first loop while traversing the shed, while the hook-shaped needle forms the second loop on the return. When the weft thread is led in at the centre of the shed and a hook-shaped needle simultaneously reaches from each side into the shed only as far as the centre, wherein the loops are formed during the return of the needles, a very high weaving speed can be attained. Several threads can also be led in by an equipment controllable according to pattern, from which the weft thread can be selected as desired. Finally, it is also feasible to provide several sheds with the corresponding weft introduction organs.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
FIG. 1 is a detail top plan view of a loom with the device according to the invention;
FIGS. 2 and 3 illustrate the same detail as in FIG. 1 with device variants.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the detail showing of the loom according to FIG. 1, only the parts essential for the understanding of the invention are illustrated purely schematically, all remaining parts being omitted to enhance the illustration of the drawings. A woven fabric 1 in the process of formation displays warp threads 2,
REFERENCES:
patent: 1320996 (1919-11-01), Turner
Chi James Kee
Kleeman Werner W.
Textilma AG
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