US2039419A - Tulle and lace comprising multiple elastic threads - Google Patents

Description

May 5 1936. A, 15A 2,039,419

TULLE AND LACE COMPRISING MULTIPLE ELASTIC THREADS Filed Sept. 24. 1934 2 Sheets-Sheet l A. ISAAC May 5, 1936.

TULLE Patented May 5, 1936 TULLE AND LACE COMPRISING MULTIPLE ELASTIC THREADS Augustin Isaac, Lyon/France, assignor to Dognin-Socit Anonyme, Villeurbanne, France, a

company of France Application September 24, 1934, Serial No. 745,329 In France October 12, 1933 5 Claims. (CI. 96-24) I This makes it practically impossible to produce a a The present invention has for its object tulles and laces made on any kind of frame or loom including a plurality of warp threads and a plurality of weft threads and the characteristic feature of which consists in that one of these series of threads is made of inextensible threads while the'other series consists of multiple ex A tensible threads. In other words, each warp thread (in the case of an elastic warp) or each weft thread (in the case of an elastic weft) consists of a plurality of elastic thread elements.

The elastic tulle or lace thus manufactured, in

which the multiple elastic thread performs, in-

the course of the manufacture andin the fabric, the same function as a simple thread, possesses elasticity not only in the direction of the elastic threads but also in a directionat right angles to said elastic threads.

These tulles and laces are free from the dis-advantages of elastic tulles and laces made up to this time on variouskinds of frames or looms and in which the elastic threads are simple.

These disadvantages are the following: i

It sometimes happens that some of these threads or certain of their portions, due to a lack of regularity in-their manufacture or preparation have a tension or a resistance different from those of the other threads so that the structure of the fabric is not'regular and the strength of some of its portions is lessened.

It also happens that when these tulles and laces are in use, an elastic thread is cut by a needle or in any other way, as a result of the handling or the use of these fabrics.

On the other hand, the fabrics according to the present invention possess the following advantages:

If the tension or the resistance of one of these threads used in combination is weak or irregular, it is practically compensated for-by the action of the other thread or threads associated with the first mentioned one. If one of the associated threads is broken or cut, either during the manufacture or when in use, the other thread, or threads, remain and therefore add to the damage resulting from the breaking of one thread. As a matter of fact, if one of three associated threads is broken, its size is only one third of that ofan equivalent single thread and the knot that is made is practically invisible and hidden under the other threads. On the contrary, -a knot of an equivalent single big thread is very big and produces a defect in the fabric which can be repaired but incompletely and with great difficulty.

tulle without defects.

A preferred embodiment of the present invention will be hereinafter described with reference to the accompanying drawings, given merely by way of example, and in which:

Fig. 1 is a diagrammatical view ofa tulle fabric including elastic warp threads and inextensible weft threads.

Fig." 2 shows the deformation of the tulle fabric in the direction of the elastic threads.

Fig. 3- shows the deformation of the tulle fabric in a direction at right angles to the elastic threads; and

Figs. 4 and 5 are diagrammatical views of modifications.

As shown in the drawings, the tulle consists of a plurality of warp threads, each warp thread consisting of a plurality of associated elastic threads, three in the embodiment shown in the "drawings, to wit: a a and 11 The inextensible weft threads b, c are wound about these warp threads and are inclined in opposite directions with respect thereto so as to form the tulle fabric.

When this tulle fabric is subjected to a tension in the direction of the warp threads, the fabric is deformed in the direction of arrow ,1, as shown in Fig. 2. Furthermore, and although the weft threads that are used are inextensible, the elastic tulle fabric that is obtained is extensible in the direction of the weft threads, as shown in Fig. 3, in which it has been supposed that the fabric is subjected to opposed stresses F, F. The elasticity of the fabric in the transverse direction or direction at right'angles to the warp threads is due to two reasons:

a. The substantially sinusoidal deformation of the elastic warp threads; and

b. The reduction of diameter of the Warp threads which, due to the reduction of their diameter releases a portion of the length'of the Weft threads wound about these warp threads.

The free part of the weft threads, which connects together the parallel warp threads, is currespondingly increased.

' REISSUE9 ing plates a single thread, two, three, or more thread elements coming from two, three or more spools are caused to pass through each hole. The

formation of the warp is then pursued in the customary manner.

b. The yarn beam, once fixed to the. loom orframe will be utilized as an ordinary yarn beam, but in each guide of the loom or frame, instead of passing one warp thread, the group of elementary threads (including two, three, or more,

threads) which is collected in each hole of the plates, will be caused to pass.

It should be well understood that the invention is not limited to the example that has just been described and that, in particular, (Fig. 4) the fabric might be made with inextensible warp threads a' and elastic weft threads b b b or again (Fig. 5) with elastic warp threads a a a and elastic weft threads b b b the special elasticity above mentioned being then added to the elasticity of the second series of threads.

What-I claim is:

.0 1. An elastic tulle fabric comprising a series of warp threads and at least one series of weft threads, each of the threads of at least one of these series consisting of at least two independent elastic. elementary threads merely juxtaposed to each other. I

2. An elastic tulle fabric comprising a series of warp threads and at least one series of weft threads, each of the threads of one of these series consisting of at least two independent elastic elementary threads merely juxtaposed to each other.

3. An elastic tulle fabric comprising a series of warp threads and at least one series of weft threads, each of the threads of the warp consisting of at least two independent elastic elementary threads merely juxtaposed to each other.

4. An elastic tulle fabric comprising a series of warp threads and at least one series of weft threads, each of the threads of the warp consisting of three independent elastic elementary threads merely juxtaposed to each other.

5. An elastic tulle fabric which comprises in combination a series of warp elements and two series of weft elements inclined in opposite directions with respect to said warp threads respectively, each of these warp threads consisting of three independent elastic elementary threads merely juxtaposed to each other.

AUGUS'I'IN ISAAC.

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