US2250229A - Device for the production of looped fabrics - Google Patents

Description

July 22, 1941. E. LUcHslNGER DEVICE FOR THE 'PRODUCTION OF LOOPED FABRICS Filed July 25, 1940 EL g [aye/221071- Patented July 22, 1941 nn-VICE `Fon THE PRoDUCTloN oF 'I-.ooPEpI FABRICS i Ernst Luchsinger, Kusnacht, Switzerland, as-

signor to the firm Luchsingers Handelsgesell- Filale Zrich, Zurich,

schaft, Amsterdam,

Switzerland Application Juiy 25, 1940, seria1N0.34i,545 In Switzerland Augustli, 1939 (on afs-4) 6 Claims.

This invention relates to a device for producing looped fabrics which is provided with two sets of needles and wherein advancing the needles of one set serves to form Ia gap with the aid of the second set of needles so that the thereupon inserted work thread will be pulled out into zigzag loop formation by the subsequent withdrawal `of the advanced needles so as to permit continuing the working afterthe first thread layer has been worked by the second set of needles.

In accordance with the invention, a flexible hook band is provided for the second set of needles, the hooks of which serve for receiving the thread loops formed by this set of needles during the start of the operation so that these loops can be `thrown by means of the band over thread loops that are subsequently formed on similar sets of needles.

The aforesaid flexible hook band is `therefore utilized even for forming the rst row of loops, and, after a second row of loops has been formed, the hook band is raised up,whereupon the downward movement of the same, starting fromone end and proceeding in a direction toward the other end, that is, gradually, serves to throw the rst row Iof loops upon the second row of loops of the corresponding set of needles, this being vtherefore rendered possible without the expenditure of additional power; the set of needles carrying this row of loops being thereupon turned around 180 on the apparatus through agency of its support member; a new row of loops then being formed on this set of needles, and the cycle is then repeated. The hook band from the time of formation of the rst row of loops remains uninterruptedly hooked thereon until a plurality of rows of loops is formed, and it is only after a workpiece of certain length Vhas been produced that the hook bank is unhooked therefrom unless it is desir-ed to leave it therein; the hook band prevents the finished loop structurefrorn rolling together. The use of va exible hook band also permits operations to be conducted with stiff threads, Ithat is, it permits the production of correspondingly more rigid loops. In that case the hook band may be of very simple construction as by providing suitable hooks at one edge of the needle carrier. The sets of needles consist of simple shaft needles so Ithat any needle carrier now in practical use 'may be utilized, and hence fine loops can also be produced;

In the accompanying drawing an embodiment of the invention is illustrated by way of example only, in which Fig. 1 isa top plan View of the `device according to the invention;

. Fig.. 2 shows a cross-section thereof;

Fig. 3 is a partial view, as seen from above, for `explaining the beginnin-g of the work.;

Fig. 3a shows a cross-section of Fig. 3;

Fig. 4 shows a partial cross-section of Vthe device in a diferent working condition compared with that shown in Eig. 2;

Fig. 5.is :a parti-al View, -as seen from above, for .explaining the continuation of the work in the condition of operationof vthe device asshown in Fig. v4;

Fig. 5a shows a cross-section of Fig. 5.;

Figs.6 anda illustrate in a top plan view and acorresponding cross-section, respectively, a fur- A'theriworking stage;

Figs. 7 and 7a `illustrate in a top plan View and a corresponding cross section, respectively, still another workingstage;

Fig. 8 is a lpartial cross-section of the device in the condition thereof shown in Figs, "I and 7a;

Figs. 9 and 9a illustrate in a top plan viewand a corresponding cross-section, respectively, a still further `working stage;

Figs. l0 and 10a illustrate in a .top plan View and a corresponding cross-section, respectively, another working stage, and

Figs. 1-1-to 13 are partial views of modifications of an individual working-member.

rI'he device is provided with an oblong casing I in the top of which a longitudinal slot 2 is arranged Which serves for displaceably guiding a handle 3 which lis secured, by means of a guide loop 4to a longitudinal bar 5, the ends of which are fastened to the upper portion of the casing I, beyond the slot 2. The handle 3 protrudes through the longitudinal slot 2 of the casing I by means of a flat neck 6 which carries a plate I which is positioned within the casing I and is provid-ed with control cams on two opposite sides there-of serving for actuating needles lr6 which are displaceably arranged in the casing I by means of a lower guide I'l and an upper guide 1'8. Theseneedles can be displaced transversely of the casing I by corresponding displacements of a sli-de which is composed of the par-ts 3, 4, 6 and 'I and is guided on the longitudinal bar v5.

To the underside of the control plate I one of the ends of a band 8 is connected, which may, by Way of example, consist of steel, and which passes over a guide roller positioned adjacent to one of the -ends 'of the casing I, the other end of the band being attached to a tension spring II which passes over a guide roller and tends to retain rthe handle 3 in the end position shown on the left hand side of Fig. 1. By shifting the handle 3 to the right the needles I6 are advanced so as to project out of the casing I to a greater extent, as shown in dotted lines in Fig. 2. VBy shifting the handle 3 in the opposite direction the needles are retracted toward the casing again, that is, into the full line position shown in Fig. 2.

The numeral I9 designates the needles of a cooperative set which is arranged on a bar said needles and bar thus forming a needle rake 29. This needle rake is inserted at its ends in two angular holders 2I which are united, by means Iof a web 23, into a sin-glie member, which is secured to the casing I by screws 24.

The needle set I9 is associated with an auxiliary member in the form of a band 60 which is provided along one of its longitudinal margins with hooks 6I the spacing of which corresponds to that of the needles I9. As shown in Fig. 1, one end of the Yband 69 is attached to the outermost right hand needle I9 (Fig. 1) by means of a loop 62.

The working is started with the needles I6 in retracted position relative to the casing I, when the working thread isv slightly tied to that immovable left hand needle I9 of the needle rake 20 and the corresponding hook 6I of the band 69 where the looping is .to begin, as indicated in Fig. 1, the thread being simply passed about the respective needle I9 and the associated hook 6I.

Thereupon the thread 25 is looselyr slung in the counter-clockwise direction about each hook 6I following to the right and the individual associated needles until the right hand needle I9 is reached which determines the width of goods required, whereupon the thread 25 is no longer slung about the hook 6I corresponding to the said right hand needle I9. This initial working operation being terminated in the manner illustrated in Figs. 1 and 3, the handle 3 is pulled to the right with regard to Fig. l whereby, by means of the plate 'I, the needles I6 are advanced, that is, displaced in the direction of the arrow shown in Fig. 3.

Consequently the needles I6 enter into the spaces between the needles I9 and are then positioned above the first layer of thread which pre- .viously had been formed on the needles I9 of the rake 20 by looping the thread at 26. In this way a gap is formed by means ofthe needles I 6 between the latter and the needles I9 in which gap the thread 25 is then placed in the opposite direction of traversing by beginning on the right hand side, as shown in Figs. 4 and 5.

Thereupon the handle 3 is returned into the left hand position, whereby the needles I6 are retracted by the control plate I. By this means the working thread 25 is drawn out into Zig-zag shaped loops 21 of uniform tension, as illustrated in Fig. 6, so that the thread then bears against the individual needles IS, I9 positioned within the range of operation of the two needle sets. Afterwards, first the thread loops 26 formed about the needles I9 are shifted upwardly on the needles I9 by accordingly folding and moving the band 69 upwardly in the direction of the arrow shown in Fig. 6a, whereupon the loops 26 are pulled off over the heads of the needles I9, so that only the second zig-zag shaped thread layer is of the first thread layer having previously been moved by means of the hooks 6I on the knockover band 60 have then accordingly been deposited on the needles I9 on top of the loops 2'I of the second thread layer, in order to form stitches 28 by interlacing.

Thereupon, the needle rake 29 is removed from the casing I in the upward direction and then turned through an angle of 180 and inserted in the holders 2| in the corresponding position, by

'Y which means the end'of the needle rake 29 havneedles, as shown in Figs. 7, 7a; 'I'he loops 26 ing previously been positioned on the left hand side of the casing I is removed to the right hand side of the casing, so that the hooks 6I of theband 60 then face toward the rake 20 as shown in Fig. 9a', whereas they had previously been facing away from the rake 20. Afterwards, the needles I6 are advancedY again in the direction of the arrow shown in Fig. 9a. by shifting the handle 3 to the right. In this way the two needle sets-*form again a gap between them into which the thread 25 is placed, whereupon the needles I6 are retracted anew and the other operations are performed as required for interlacing the row of loops in the manner explained above.

As soon as a certain number of stitches has been produced and thus an according portion of the Work is completed the band 66 may be removed from the work in that the interlacing of the loops into stitches can then be effected by means of a bar 63 which, as shown in Figs. 11 to 13, is provided with a toothed longitudinal edge for engagement with the looped fabric from below, as indicated in chain-dotted lines in Fig. 10a forY detaching the fabric from the needles I9 by accordingly folding and moving the band 60 upwardly, as previously described. Thereupon the needle rake 2D is turned end for end through an angle of relative to the casing, so that the looped fabric is again positioned in front.

Asshown in Fig. 1l, the bar 63 is provided with pointed teeth 64, whereas Fig. l2 shows rounded off teeth 65, and Fig. 13 depicts teeth with intervening tooth gaps of different depths forming a repeat of pattern in the row of teeth, or serrations.

The needle rake 20 is preferably secured in position in the holders 2I by the arrangement of a spring pressed locking ball on each vertical Yengagement face of the holders, for the purpose of engaging with a corresponding recess in the needle rake 20.

Between the casing I and the web 23 carrying the two holders 2| an insert may be arranged for the purpose of varying the distance between the needles I9 on the rake 20 from the needles I6 in the advanced position of the latter in order that accordingly wider or narrower stitches may be effected.

' In the embodiment of the invention shown, two needles I6 enter, in the advanced position 4of these needles, between each two adjacent needles I9, but the arrangement may also be such that, for example, between each two adjacent needles I9 on the rake 29 only one neede I6 or more than two needles I6 penetrate while advancing.

Instead of a flexible band 66 a rigid member may be used for carrying the hooks 6I, such as, for example, a hook carrier bar or the like.

I claim:

1. In a device for the production of looped textile goods, a stationary needle set for the formation of a rst row of loops thereon by means of the working thread, a second displaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said iirst set, control means for advancing and retracting the needles of said second set -between the needles of said first set, and an auxiliary knock-over member associated with said first needle set for depositing said first row of loops on further loops having been formed on said needles of said first set, for effecting stitches by interlacing said rst loops with said further loops.

2. In a device for the production of looped textile goods, a stationary needle set for the formation of a first row of loops thereon by means of the working thread, a second displaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said first set, control means for advancing and retracting the needles of said second set between the needles of said first set, an auxiliary knock-over member associated with said first needle set, and thread holding elements arranged on said member, said holding elements being spaced apart from each other distances equalling the spacings of said needles of said first needle set, for depositing said iirst row of loops on further loops having been formed on said needles of said first set, for effecting stitches by interlacing said first loops with said further loops.

3. In a device for the production of looped textile goods, a stationary needle set for the formation of a first row of loops thereon by means of the working thread, a second di-splaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said first set, control means for advancing and retracting the needles of said second set between the needles of said rst set, an auxiliary knock-over member asso'- ciated with said rst needle set, and hooks arranged on said member, said hooks being spaced apart from each other intervals equalling the intervals between the needles of said first needle set, for depositing said first row of loops on further loops having been formed on said needles of said rst set, for effecting stitches by interlacing said first loops with said further loops.

4. In a device for the production of looped textile goods, a stationary needle set for the formation of a first row of loops thereon by means of the working thread, a second displaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said first set, control means for advancing and retracting the needles of said second set between the needles of said rst set, and a band serving as a knock-over member associated with said first needle set for depositing said first row of loops on further loops having been formed on said needles of said first set, for effecting stitches by interlacing said first loops with said further loops.

5. In a device for the production of looped textile goods, a stationary needle set for the formation of a first row of loops thereon by means of the working thread, a second dsplaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said first set, control means for advancing and retracting the needles of said second set between the needles of said first set, and a bar shaped element serving as a knock-over member associated with said first needle set for depositing said rst row of loops on further loops having been formed on said needles of said rst set, for effecting stitches by interlacing said rst loops with said further loops.

6. In a device for the production of looped textile goods, a stationary needle set for the formation of a first row of loops thereon by means of the working thread, a second displaceable needle set for forming a thread receiving gap between said two needle sets by conjointly advancing the needles of said second set between said stationary needles of said first set, control means for advancing and retracting the needles of said second set between the needles of said rst set, a bar shaped element serving as a knock-over member, and a serrated longitudinal edge on said element for depositing said first row of loops on further loops having been formed on said needles of said rst set, for effecting stitches by interlacing said first loops with said further loops.

ERNST LUCI-ISINGER.

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