Textiles: knitting – Fabrics or articles – Incorporated unknitted materials
Patent
1996-02-27
1997-07-01
Bell, James J.
Textiles: knitting
Fabrics or articles
Incorporated unknitted materials
66198, 442306, 442312, D04B 2308
Patent
active
056426330
DESCRIPTION:
BRIEF SUMMARY
The invention pertains to an elastic band, produced by crocheting having the features recited in the preamble of claim 1. The invention is applicable particularly to an upholstery band, as is required for the backrests of chairs, armchairs or couches. Elastic bands, made by crocheting, having the features recited in the preamble of claim 1 are known from the documents U.S. Pat. No. 4,248,064 and GB-A-967 570. There is provided one stationary weave thread for each rubber thread, which loops around the same rubber thread as well as the front and back weft thread. For upholstery, the bands are attached to wooden frames by tacks. In most cases also these threads will be cut off. The band then unravels from these points during use.
The upholstery bands cross one another within the upholstery frame. During use they stretch and slip relative to one another, producing a disturbing sound if they are conventional, relatively rough bands.
The present invention is to provide an elastic band meeting the following conditions at one and the same time:
1. Starting from not covered rubber threads, the band is to be producible on a single machine, namely a crocheting machine.
2. The band is to be protected against unravelling, even at damaged locations.
3. The band is to have a smoother surface than conventional ones and therefore not produce any sound during use.
4. The band, while having the same load-carrying capacity as a conventional elastic band, is to be thinner than the latter.
These advantages are attained by a crocheted elastic band according to claim 1.
An exemplary embodiment incorporating further features of the invention will be described below with reference to the drawings.
FIG. 1 is a portion of a crocheted elastic band according to the invention, depicted in highly schematized form.
FIG. 1a is a schematized cross section of the band in FIG. 1, parallel to the weft threads.
FIG. 2 is a side view of the head end of a conventional bearded needle.
FIG. 3 is a side view of the head end of a bearded needle suited for producing a crocheted elastic band according to the invention.
FIG. 1 depicts in highly schematized form a small portion of a crocheted elastic band according to the invention. The band has rubber threads 2, 2a, 2b, by which threads made of rubber or artificial rubber, generally threads of high elasticity, are meant. The band has weft threads running transversely to them, namely front weft threads 4 and back weft threads 6. The designations "front" and "back" correspond to the representation in FIG. 1. These weft threads are made of relatively inelastic textile material. No loops or other form of covering is provided around the rubber threads 2, 2a, 2b, saving a respective operation.
FIG. 1 further shows that each of the rubber threads 2, 2a, 2b together with the front and back weft threads 4, 6 has loops of one of the weave threads 7 around it. Since these weave threads 7 make loops along only one single rubber thread, they are therefore referred to here as "stationary" weave threads.
Also shown are weave threads 8, 8a, 8c crossing from one rubber thread to another and therefore referred to here as "jumping" weave threads. These jumping weave threads loop around the rubber threads 2, 2a, 2b on the one hand, around the back weft threads 6 on the other hand, but not around the front weft threads 4. Along the rubber thread 2a the jumping weave thread 8 (at the top in FIG. 1) loops around three successive back weft threads 6 and the rubber thread 2a. It then jumps leftwards to the neighbouring rubber thread 2, loops around it at three successive crossing points of the rubber thread 2 and only the back weft thread 6. The jumping weave thread 8 then jumps back to the original rubber thread 2a, loops around it at three further crossing points in the above-described manner and jumps back again to the same neighbouring rubber thread 2 and so on.
A jumping weave thread 8a at the right side of the weave thread 8 is guided in the same way. At the left in FIG. 1 a further jumping weave thread 8c is to be seen,
REFERENCES:
patent: 4248064 (1981-02-01), Odham
patent: 5125246 (1992-06-01), Shytles
Bell James J.
Munchberger Band- Und Gurtweberei GmbH
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