DE2102628A1 - Curtain tape and loom to make it - Google Patents

Description

D ^. Ki.:h-:.rä Ghv / e
Dip! - Ing. kiaus Dejfs

Patent attorneys ^A ~ °

Thomas French & Sons Limited, Chester Road, Manchester MI5 ² KTD, England

Curtain tape and loom to make it

The invention relates to a curtain tape and more particularly to the manufacture of the same by means of a needle loom (shuttleless loom).

In the case of one form of curtain tapes, it is known to insert a weft yarn consisting of a monofilament in order to stiffen the tape laterally and to improve the formation of folds. An example of a curtain tape is described in commonly assigned patent 919,378 Jt .

One of the difficulties with curtain tapes with a monofilament weft is the lack of stability of the Fabric in the lateral direction, which is due to the fact that the monofilament weft 'is naturally "slippery", so that when a lateral tension occurs on the surface

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of the tape works, the warp threads can be easily pulled apart and expose a group of monofilament weft yarns. Such difficulties can be alleviated by making the warp threads tighter, but this has other disadvantages, such as stiffening the belt in the longitudinal direction and increasing the weight and cost of the belt.

However, a dense arrangement of the warp threads not only increases the rigidity in the longitudinal direction and the cost of the belt, but also makes wrinkling more difficult than what is normally manageable, especially when the tape is used industrially to be used in the production of ready-to-hang curtains.

Up to now, Bs has been possible in some cases, an originally to produce stable tape in the lateral direction without using Kunststoffgarη, but it has been shown that the tape loses its rigidity when it is washed or cleaned, and such tapes have not become generally accepted.

Attempts have been made to provide rigidity by using relatively wide straps in conjunction with hanging hooks To achieve a long hook finger, however, despite the achievability of pleasing effects result from such a measure numerous disadvantages for achieving rigidity. Example

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wisely, hooks with a long finger are expensive to manufacture and consequently also to use, and are also difficult to flawlessly use, and to achieve pleasing effects, their spacing must be carefully chosen to allow for the possibility to avoid irregular wrinkling.

These have disadvantages of using unstiffened tapes on the whole led to the curtain manufacturers and users turning away from their use, and it came about from there a need for a laterally stable tape that is easy to use to hang up with hooks with short hooked fingers and is not so stiff that it jams the tape between a curtain rail and a runner or slider leads.

Although it is possible to overcome the previously existing difficulties in the production of a curtain tape by a loom with shuttle is used, but the object of the invention is to provide such a curtain tape, which can be produced using a needle loom, which therefore has other means for the weft insertion than shooters, since it is to be expected that the production output can be increased considerably through the use of a needle loom.

According to the invention is a needle loom with a weft insertion device in the form of pivotally mounted,

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arcuate curved. Links that are used to insert bows of the protective thread in a compartment in this or this

can
leave /, and with an edging device running along

the chain can be moved back and forth, characterized in that that three such weft insertion devices are provided, two of which are suitable for entering weft loops in a divided compartment (double compartment) that is used, to make a base tape fabric, and the third of which is used to insert weft loops into a shed that for the production of pockets on the base tape fabric, the two being laid in the base tape fabric Wefts on the edge opposite the entry side for the formation of a real edge by knitting or knitting be approached with a catch thread, while the weft thread loops for the pocket formation to form interlocking Stitches with or without a catch thread are forfeited with one another.

Appropriately, at least one of the weft yarn loops inserted to form the base fabric is placed in the edge area the chain is deflected in a vertical plane, so that it is ensured that the two loops close together come lie so that a catch thread to be entangled can be wrapped around the warp yarn at the same time and on this way the two groups of weft loops with each other can be anchored

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Preferably there is one in the curtain tape to be woven of the weft yarns of the backing is a relatively stiff yarn made at least in part of a synthetic plastic material consists.

In the drawing are embodiments of the invention for example shown.

Fig. 1 is a cross section to the weft direction through a fabric according to the invention over the length of the * repeating pattern;

Fig. 2 to 5 show schematically the individual process steps of shedding for those warp threads, which form the base fabric;

Fig. 6 is a partial view of a mechanism for use with a needle loom for loading the weft yarns into a warp shed

Figure 7 is a bottom view of the mechanism of Figure 6;

Figure 8 is a front perspective view of a fabric made in accordance with the invention; and

FIG. 9 is a view similar to FIG. 1 for illustrative purposes a modified form of weaving, for which only one

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Part of the repeating pattern is shown.

A curtain tape made according to the invention is illustrated in Fig. 8 and consists of a base fabric B, on one side of which a narrower band C is attached, which is connected to the base fabric part B by means of warp threads of the narrower band are woven together with those of the base fabric, so that by such a recurring bond the chain of the narrower belt C with that of the base fabric B a series of pockets is formed into which curtain hooks as required or rings can be used. The tape also has pleated cords P, which hold the base fabric B in induce wrinkles in a consistent manner. The pleat arrangement shown in Fig. 8 is of course not that The only achievable modifications of the fold formation can be achieved by changing the arrangement of the pleated cords and the Pleated hooks can be achieved.

As best seen in Figs. 1 to 5, the tape is using two spun weft yarns and one monofilament Weft woven. Vie Fig. 2 can best be seen, this is one of the spun weft yarns 10 only in conjunction with uses the warp thread 11 and 12 of the narrower band C,

+ and the other weft 13 spun together with the

Weft thread 14 is used to weave the base fabric B of the tape.

+ raonofilen

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The warp threads 15, 16, 17 and 18 for the base fabric B and the warp threads 11 and 12 for the narrower band C and the pissing cords P are made using a needle loom divided with seven shafts. This needle loom is of the type in which the weft thread is inserted by means of a sickle-shaped Weft insertion needles takes place and thus when introducing and returning, ■ -. pulling the weft insertion needles into the shed weft loops be entered, and therefore every registered weft is marked in the drawing by two dots «

The shafts for the warp threads and the pleated cord are <_; arranged in the following way:

The shaft no.1 as a lifting element for the pleated cord P.

Shafts no. 2 and 3 as lifting elements for the warp threads and 12 for the narrower band C, which is used to form the pockets is used.

Shafts no. K, 5, 6 and 7 as lifting elements for the warp threads 15, 16, 17 or 18 for the base fabric B.

In the interests of clarity, the process when weaving the base fabric (with reference to FIGS. 1 to 5) without taking into account the weaving of the warp threads forming the pockets and without taking into account the production of the effective edge. The woven fabric is used to weave the base fabric

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Weft yarn 13 and the relatively stiff weft yarn 14 used These two weft yarns 13 and 14 are in a shed formed from the warp threads by means of sickle-shaped Weft insertion needles 19 and 20 (Fig. 6) entered for the entry of a weft yarn loop can be pivoted together about a vertical pivot bearing 21. The spun Weft yarn 13 is the weft thread 14 by means of the needle 20 entered by means of the needle 19. The two weft insertion needles 191 20 are moved simultaneously, and to hold the relatively stiff weft yarn 14, (especially if this is a monofilament weft yarn with a slippery Surface), a double compartment (Fig.

to 5) used «The spun weft yarn 13 is entered in the upper compartment of the double compartment, the other weft yarn 14 in the lower compartment of the split compartment or double compartment, and to do this in one of several possible practical ways, the shafts k through 7 can be excavated in the following order, assuming that the cycle begins with the shaft 5 raised to the upper position «

Those warp threads that are controlled by the shaft 5, the warp threads 16 are on top, while the warp threads 17 and 18 of the shafts 6 and 7 are in their pulled down position and the warp threads 15 of the shaft

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are in their middle position. The relatively stiff weft 14 is in the lower of the so formed Fan and the spun weft 13 entered into the upper compartment.

The first change of subject after entry of the shot has the consequence that the shafts are brought into such a position that the shafts 6 and 7 continue to remain raised downwards, while the shafts h and 5 are exchanged in such a way that the former is now in the upper position and the latter in the middle position. Then loops of the yarns 13 and 14 are again entered in the two parts m of the double. The next time the subject is changed, the shafts h and 5 are both moved into the raised position, the shaft 7 is brought into the middle position and the shaft 6 is brought into the upper position. Now weft yarn loops 13 and lh are again entered in the two parts of the double shed.

The next time the subject is changed, the positions of the shafts 6 and 7 are reversed, while the shafts k and 5 remain in the position raised downwards in the direction j. Weft loops are again entered in the two parts of the double shed.

The next time the subject is changed, the initial status is restored, with the shaft 5 in the raised position. This cycle is repeated continuously.

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As concerns the formation of the square edge for the base fabric, it should be noted that with each weft insertion, each of the two weft insertion needles 191 20 inserts a weft thread loop.In contrast to normal technology, these loops are not forfeited in order to achieve a marginal edge that is not thickly applied a loop is pulled through the previous one, but the loops are placed closely on top of each other by deflecting the weft yarn loop 13 of the upper weft insertion needle downwards after it has been inserted into the shed. 19 and 20 have fully entered the associated parts of the double shed, close to each other, and at this point in time a catch thread 22 (FIGS. 2 to 5) supplied in the chain direction along the fabric edge is in such a position that it is of the hook one Latch needle 23 that moves back and forth along the edge of the fabric can be grasped and taken along. Meanwhile, the weft insertion needles 19 »20 are withdrawn and the catch thread 22 remains within the loops of the newly inserted weft thread loops 13 and 1k . so that the hook is now a further loop of the catch lying in the two weft loops

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thread 22 can grasp · After pulling back the latch needle the pang thread loop in the hook is replaced by the previous one Loop pulled through, and this now slides off the needle shaft (and closes the tongue so that it cannot be caught by the hook), and in this way a knitting stitch is created repeated synchronously with the movements of the sickle-shaped weft insertion needles 19 »20, so that a knitted edge is produced, which connects the two weft thread loops 13 »14. Because only a catch thread 22 is knitted, the edge is not thick ^.

6 and 7 illustrate the arrangement of the weft insertion needles for carrying out the working cycle described above. As shown in Figs. 6 and 7, the weft insertion needles 19 and 20 are mounted on a common control arm 2h together with a weft insertion needle 25 which is used for inserting the weft yarn 10 into the shed of the warps dog 12 of the narrow ribbon C. The control arm 24 is

mounted on a support plate 26 which, at its end facing away from the arm 2h , is formed into a toothed wheel segment 27 through which the pivot pin 21 passes, around which the weft insertion needles move on their arcuate path. The pivot pin 21 also carries a cam member 28 (FIG. 7) and this is arranged in such a way that it can be moved synchronously with the segment 27 in the interest of a function to be explained below.

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The movement of the segment 27 and thus the weft insertion needles and the cam is controlled by the main drive of the needle - Chair via a (not shown) linkage and a first reciprocating shaft 29 on which a gear segment 30 is mounted, which is in engagement with segment 27 *

The cam member 28 cooperates with a cam follower 31, which is mounted on a shaft 32 which is mounted in bearing blocks 33 which are attached to the underside of a (not shown) Frame of the needle loom mounted support plate 3 ^ - are formed. The shaft 32 is loaded (by means of a spring 35) so that the cam follower 31 rests on the cam 28 is guaranteed. At the free end of the shaft 32, a fishing thread guide 36 is mounted, which is driven by the Shaft 32 can be reciprocated in a vertical arc in such a way that, during operation, the insertion of the catch thread 22 in the hook of the latch needle 23 causes.

The latch needle 23 is mounted in a slider 37, which also receives a second latch needle 23, a, which is in a horizontal Level is movable back and forth with respect to the strands of the needle loom. To control this movement is a second shaft 38 provided by the main drive of the needle loom is driven and on which one link 39 of a parallel joint drive is mounted. The other end of the link 39 is hinged to dom slide 37 · Lin ^ -wide GJ lot '<ίθ

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this drive is hinged to a bracket 41 of the support plate 34 and to the slider 37.

A plate 42, which carries two weft loop deflectors 43 and 44, is mounted above the slide 37. The distractor 44 is arranged in such a way that it the weft yarn loop 14 inserted by the weft insertion needle 20 downwards

in
deflects and / the close proximity of the weft thread loop brings the weft insertion needle 1 ° when the weft insertion needles approach the end of their movement through the shed, so that the catch thread 22, which is guided into the hook of the needle 23, in the manner described by the two Weft thread loops 13 and 14 can be wrapped.

The other deflector 43 is used, as will be described later is, in addition, the weft yarn 10 of the narrow tape C on the latch needle 23a. to lead to an intertwining of the To enable loops of this weft yarn in the usual way when forming a knitted edge on a needle loom.

During the weaving of the base fabric B, the narrower belt C for pocket formation is also woven, and this becomes thereby manages that the shafts 2 and 3 to form a separate compartment (when weaving the bags) in the upwardly excavated Position.

The third weft insertion needle 25 loops a spun weft yarn 10 into that of the warp threads 11 and 12

2 Ί Ο 2 6 2 8

of the shafts 2 and 3, and the loops of the weft loops thus formed become a knitted edge intertwined by means of the latch needle 23a, the can be moved back and forth in the chain direction past the compartment. In this case, no catch thread is used, and the latch needle 23 yes only grasps the loops of the weft thread loops with its hook, in order to pull one of these loops through the previous one in a known manner.

Xn the spaces between those of the narrower band C pockets formed are the warp threads 11> and 12, which this Form a band together with the warp thread 151 for shedding 16, 17 and 18 moved so that they are woven with the spun weft yarn 13 of the base fabric B. The shafts 2 and 3 are therefore moved together with the shafts 4, 5 »6 and 7, which are at every moment during the working cycle in the upper and middle shedding positions so that the stiff weft 14 in the tape consistently in the lower part of the double of the base fabric B.

The shaft 1 is operated at the necessary intervals in order to insert the pleated cords P into the base fabric B.

The band produced in this way can be woven relatively quickly and has the advantage of relatively high rigidity in the weft direction.

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In FIG. 9, in which the same reference numerals as in FIG. 1 have been used for corresponding parts, it is illustrated that there is the possibility of weaving the base fabric B in a manner other than that described above. In this case, the shaft 5 from an upper shedding position into a middle shedding position and then into a lower shedding position and back again into the middle shedding position, while the shaft k is moved from a middle shedding into an upper and then back into a middle and finally from there into a lower shedding position During these four phases of shedding ^ the shaft 6 is moved from a middle into a lower, then back into a middle and finally into an upper shedding position, while the shaft 7 is moved from a lower shedding position into a middle, then into an upper and finally is moved back to an intermediate specialist position. This work cycle of shedding is continuously repeated when weaving fabric B. As can be seen, the stiff weft yarn lh is woven here with every double stroke of the weft insertion needles instead of just every second double stroke. M.

Claims

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Claims (1)

Claims ίΐ i needle loom with a weft thread insertion device in the form of pivotably mounted, arched curved links for entry into and exit from a compartment for insertion of weft yarn loops into it and with an edge knitting device that can be moved back and forth past the shed in the direction of the warp, characterized in that three insertion devices for weft yarn loops are provided, two of which are used to insert weft yarn loops into a double shed formed for the production of a base fabric and the third serves to insert weft yarn loops into a compartment formed for the production of pockets in the base fabric, that the two weft yarn loops inserted into the base fabric are brought closer together at the edge remote from the insertion side for knitting a catch thread to form a knitted edge, while the weft yarn loops for the pockets themselves to form interlocking loops with or without Catch thread are knitted together " , VeTD- ~ oz \ :.
2. Needle chair according to claim 1, characterized in that two latch needles are provided which are arranged such that they can be moved together, and one of which is for receiving a catch thread from a thread guide - 16 109831/1 ^ G and for knitting the same into interlocking stitches to tie them together in the shed of a base fabric registered weft yarn loops are suitable, and that a common drive device is provided for the two latch needles, which is connected to the drive device is synchronized for the catch thread guide. web- dew.
3. Needle loom according to claim 1, characterized in that the device for bringing the two weft yarn loops of the base fabric closer to one another consists of a deflecting element which is mounted next to one another in the vicinity of the latch needle of the needle loom for knitting the catch thread « k » Woven ribbon produced on a needle loom according to one of claims 1 to 3, consisting of a base fabric and a narrower ribbon interwoven on this to form pockets at intervals, characterized in that three weft yarns are used to produce the ribbon, one of which one is only used to weave the narrower ™ tape and the other two are woven in a double shed of warp threads for the formation of the base fabric and that one of these last two weft yarns is always woven in an upper and the other always in a lower shed of the double shed. - 17 - 109831 5. fabric tape according to claim. 4, characterized in that at least one of the registered for the formation of the base fabric Weft yarn is deflected in the area of the edge of the warp in a vertical plane, so that the two Weft yarn loops are closely approximated and a catch thread for the formation of a knitted edge at the same time the warp thread can be looped around the weft loops of the two groups. 6. Fabric tape according to claim k or 5 as a curtain tape, characterized in that one of the weft yarns of the base fabric is a relatively stiff yarn which consists at least in part of synthetic plastic material. 7. Fabric tape according to claim 6, characterized in that the relatively stiff yarn is in the form of a monofilament is present. - 18 - 109831/1536