Textiles: spinning – twisting – and twining – Strand structure – Covered or wrapped
Patent
1986-06-02
1988-08-09
Petrakes, John
Textiles: spinning, twisting, and twining
Strand structure
Covered or wrapped
57 5, 57210, 87 6, 1603491, A47H 2301, D02G 344
Patent
active
047619457
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a weighting cord of the type set forth in the generic portion of claim 1 and disclosed in the German Auslegeschrift No. 11 89 686.
For the weighting of curtains, there exist bare arrays of beads (German Pat. No. 962 192) which include a row of spaced lead beads arranged one behind the other on a central carrier string. These weighting means provide adequate weight in a small amount of space and, due to the free spaces between them, are sufficiently flexible for unhindered pleating. However, processing of the bead arrays poses difficulties because the front ends of the lead beads catch while the array of beads is being inserted or worked in. This cannot be entirely avoided by providing the ends of the individual lead beads with inclined or rounded surfaces in order to achieve smooth insertion, especially since such special shaping of the individual lead beads is expensive. Another drawback of these known arrays of beads is that the spaces between the individual lead beads are not adequately maintained; the lead beads can shift relative to one another on the central carrier string. This leads to a non-uniform weight distribution, and hence to varying weighting effects in the thus-equipped curtain.
The enumerated drawbacks in weighting cords of the preceding type are avoided by means of a tube which surrounds the array of beads (German Auslegeschrift No. 11 89 686). The tube bridges the free spaces between the weighting bodies without significantly affecting the flexibility of the bead array during pleat formation. The tube also creates an essentially uninterrupted cord surface which makes it possible to work the weighting cord into the curtain or to draw the cord into the border of the curtain smoothly and without hindrance. Furthermore, a tube which surrounds and, in particular, tightly surrounds, the array of beads maintains the desired spacing of the weighting bodies relative to one another and prevents their inadvertent displacement during incorporation into the curtain or during use of the curtain. The exterior textile character of such weighting cords is likewise favorable because they optically better match the curtain equipped therewith. There are, however, other drawbacks.
Thus, the production of a textile tube for weighting cords of this type is very expensive. The textile tube for the known weighting cords is produced by the crisscrossing of fibers in a braiding operation where the supply reels, which respectively hold only limited lengths of the individual fibers, are intertwined with one another on a complicated braiding machine in accordance with the desired braid pattern. Even with very fast, and hence trouble prone, braiding machines, the textile tube can be produced at a rate of only a few centimeters per minute. This results in a relatively high price for the weighting cords.
It has been recognized that the production of the textile tube for such weighting cords leads to high manufacturing costs (German Offenlegungsschrift No. 24 32 580). However, it was then considered necessary to dispense with the production of a textile tube and to strew the array of beads, that is, the lead beads as well as the carrier string which is visible in the free spaces, with a flock yielding a bristle-like coat. While these bristles do hold against sliding at the locations of contact with the curtain, the elimination of the tube raises the possibility of catching of the flock-coated bead array during incorporation into the curtain or during drawing into the finished curtain. This danger cannot be avoided by roof-shaped front surfaces at the ends of the lead beads which surfaces, as already mentioned, incur additional production costs. Sufficient amounts of the flock do not reach the exposed portions of the central carrier string which lie between neighboring lead beads so that longitudinal shifting of the lead beads on the carrier string during incorporation into the curtain or during use of the curtain cannot be ruled out.
The object of the invention is to provide a weighting cord of
REFERENCES:
patent: 1050748 (1913-01-01), Paulsson
patent: 3259151 (1966-07-01), Schmitz
patent: 3400628 (1968-09-01), Herzog
patent: 3623397 (1971-11-01), Hayashi et al.
patent: 3684608 (1972-08-01), Schmitz et al.
patent: 4209965 (1980-07-01), Bobkowicz
August Bunger Bob-Textilwerk KG. GmbH & Co.
Kontler Peter K.
Petrakes John
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