DE1956450A1 - Method and device for the production of staple fiber yarns - Google Patents

Description

Folder 22107 - Dr ₀ K / st
Case Ρο2ΐή87 / 21927

IMPERIAL CHEMICAL INDUSTRIES LTD ₀ itondon, Great Britain

"Method and device for the production of staple fiber yarns ^m

Priorities j 8 ₀ 11. 1968 and 2O ₀ 5ο 1969 - Great Britain

The invention shall look to the manufacture of staple fiber yarns consisting of wherein _s is a roving of staple fibers drawn and twisted yarn ₈ such mn prepare _o

Staple fiber yarns are usually produced on a drawing device which usually comprises one or more often even two drawing stages _o In the latter case the first stage _t through which the roving passes usually has a lower draw ratio than the second stage "

An error that occurs during the manufacture of staple fiber yarn by drawing and twisting processes ₉ is commonly referred to as

009824/1788

BATHROOM OFtIQiNAt

"Cracker" means which term describes a bundle of small loops of fiber that are tightly tied together. The number of crackers, which occurs in the yarn "is variable amount which also applies to the length of each individual formed Crackers" The length of a cracker, for example, 3.2 to 25 can, J ¹ mm.

A major factor contributing / ollstapelfasergarn to the appearance of crackers in a Baumv is probably the presence of staple fibers with a long in the roving from which the yarn is produced _a A staple fiber with excess length 1st one present in the roving fiber having a length is greater than the effective staple length of the major number of staple fibers in the roving. In other words, the majority of the staple fibers in a roving are the same length, doh. the effective staple length, but the roving can also contain smaller groups of fibers, some of which are shorter and some of which are longer than the effective staple length. During the drawing of a roving, the drawing conditions are selected in consideration of the effective staple length so that the majority of the staple fibers are efficiently processed. The smaller staple fibers pass through the pulling device without difficulty, but the longer staple fibers, doh, "the excess length fibers, give rise to the formation of crackers. The role that the excess length fibers play in the formation of the crackers is probably as follows:

A fiber with excess length present in the roving goes under such circumstances that the fiber with excess length passes the drawing stage overstretched, through the pulling device with the speed that you when entering the only or the last drawing stage is issued, even if the front end is already coming out of the drawing stage again. The normal one

009824/1788

BATH ORIGINAL

Staple fibers in the roving, on the other hand, increase their speed when they pass through and exit the drawing stage. There is now a tendency for the normal staple fibers to be held in place by fibers of ascending length; the result is the formation of a loop or loops of pasers due to the higher speed of the norraal staple fibers. The formation of the cracker is έ so long continued until the Rear-end of the staple fiber length by the upper entrance of the drawing stage 1st passed or until the fiber breaks.

Fibers having contact ascender In rovings of Haturfasern to _s

because some fibers grow longer than the others "In the event

Clay man-made or made from synthetic fibers can fibers

with extra long made during the manufacture of staple fibers a cable with a high titer, which consists of endless threads " be formed; they can, for example, their reason In different tensions in the endless threads or in a missing pacalellite of some of the endless threads during passage through the cutter or in a | have poor performance of the tailor.

The object of the invention is to create a method and a device for the production of staple fiber yarns, in which, even if fibers of excess length are in the roving forehands * ¹ , from the. The yarns are made _t the occurrence of crackers if not eliminated then at least greatly reduced.

009824/1788

bad original

Thus, according to the invention, there is provided a method of making a yarn from a yarn made of staple fibers Proposed roving, in which the roving is passed through at least one stage in which there is a «drawing process is subjected, and in which the drawn roving is twisted to form a yarn, characterized in that, that the twist is retained by passing the drawn roving through a further stage in which it is practically not pulled and completely worn during the passage.

The roving can be passed through two successive drawing stages, with it being drawn in one stage than in the other, whereupon it is passed through the further stage in which there is practically no pulling takes place ο That draw ratio in the first drawing stage is usually lower than the draw ratio in the second drawing stage.

The expression "the twist is held back" means that the twist applied to the drawn roving by the further "running essentially without drawing Stage is prevented from leaving the only one or to run back to the last speed step.

According to the invention, a device for producing a yarn from a roving consisting of staple fibers is also proposed, comprising the following parts; a device which forms at least one drawing frame for the roving, a twisting device ₉ which can apply a twist to the drawn roving, and a device which rushes back the twist and acts so that the roving that has already been drawn is practically no longer drawn and that the drawn

009824/1788
BATH ORIGINAL

Material during its run from the single or the last drawing stage to the place where the twisting occurs the drawn roving is applied by means of the twisting device, is completely worn.

The apparatus preferably has two drawing stages, which are formed by three sets of rollers, each group consisting of a pressure roller and a drive roller, and wherein the individual groups with different rate-driven dlgkeiten λ, which is defined by the required for the two drawing stages draw ratios are. In another embodiment of the apparatus, a transport device is used in place of some or all of the roller groups. By the expression "transport device ¹ * is meant an endless belt driven by rollers.

The twisting device can, for example, take the form of a Ring-and-traveler winding mechanism or the shape of a

have other well-known winding mechanisms which twist the drawn material or yarn and the twisted

Material on spool »|

Preferably the means for holding back the Twisting from a single roller or from a group consisting of pressure roller and drive roller or from one Pair of transport devices following the single or the last drawing stage o are arranged »

The rovings used according to the invention to produce the yarns can be synthetic, artificial or natural Consist of staple fibers or mixtures thereof. Examples of synthetic fibers are those made from polyesters

00982A / 1788
BATH tf *

and polyamides are examples of artificial fibers Cellulose fibers; and are examples of natural fibers Full and tree troll fibers

The invention is particularly applicable to the production of τοη staple fiber yarns applicable »which consist of staple fibers of the" cotton type ". With the expression "staple fibers of the cotton type" is a natural fiber or a synthetic staple fiber with a length that is substantially the same "That of the natural fiber is" mentioned.

So there is still a method according to the invention proposed for the production of a staple fiber yarn from a roving consisting of staple fibers of the cotton type » in which the roving during its passage through two consecutive Stages is drawn »whereby one stage has a higher draw ratio than the other stage» thereby characterized in that the sucked roving through a further step with a lunge is no larger than the effective one The staple length of the fibers in the roving is passed through, in which the drawn roving is practically no longer drawn, whereupon the drawn roving is twisted and wound up in the form of a yarn.

Typically, the first stage draw has a draw ratio on the order of 1.5: 1 and the second stage draw has a draw ratio on the order of 22: 1.

According to the invention, a Zlehvorrieh- will eventually 'processing for the manufacture of staple fiber yarns from a group consisting of staple fibers of the roving Baunwolltype proposed, which is characterized in' that it comprises the following parts: means for supplying a

0Ö882A / 1788

BADORÄÄ

Rovings, three groups of rolls, each group made up

a pressure roller and a drive roller, which are arranged and adapted to be used with certain

Speeds are driven in that two

üiehstufen are formed, having a higher draw ratio than the other, a fourth pressure roller and a · drive roller therefor _t which is arranged so that ■ ie nit of the third group of said three roller groups • ine third drawing step forms ₃ which drawing stage a Lfinge

not greater than the effective staple length of the fibers Im f

Has roving and operates in such a way that

the fourth pressure roller has a speed ratio of 1 s 1 old of the third pressure roller, and a device sum twisting and winding the sucked roving as

In a preventive execution «form of the invention The third and fourth pressure rollers are arranged in such a way that they are driven by a common drive roller be set in rotation.

The present invention not only allows the manufacture, a yarn made from rovings that is essentially free of crackers. "Poor quality but also allows processing of rovings made of randomly mixed staple fibers of different lengths, which rovings are usually only extremely difficult to process into yarn that practical are free from crackers.

009824/1788 BAD ORIGINAL,; _v .

The invention will now be explained in more detail with reference to the accompanying drawings.

Zn the drawings show: Figo i is a side view of a. Embodiment of a

device according to the invention;
Figure 2 is a similar view of a second embodiment

the device according to the invention; Figure 3 is a similar view of a third embodiment

the device according to the invention; and Figure 4 is a similar view of a fourth embodiment the device according to the invention.

In the drawings, the same parts have the same reference numbers

According to Flg. 1, a configuration of a device according to the invention has three groups of rollers which form two drawing stages. The first group comprises a pressure roller 1 and a drive roller 2. The second group comprises a pressure roller 3 and a drive roller H, The third group comprises a pressure roller 5 and a drive roller 6. The speed ratio of the first and the second group of rollers is less than that of the second and third groups of rolls, so that the second drawing stage has a higher drawing ratio than the first drawing stage.

The pressure rollers 1, 3 and 5 can be set to (not ge *, showed) springs attached so that the strength of the pressure can be changed. Another pressure roller 7 is also arranged so that it is set in rotation by the drive roller 6. There are smocks (not shown)

009824/1788
BATHROOM OFtIGINAL

provided with which the pressure roller 7 on the Drive roller 6 applied pressure can be adjusted »

The device also has a ring (not shown) and = rotor winding mechanism »

During operation, a roving 8 made of staple fibers is is, fed to the device and subjected to two drawing stages, one * between the groups of rollers 1,2 and 3j »4 and the other between the groups of roles 3 ** 1 f and 5.6 takes place. The drawn roving emerges from the gap between the pressure roller 5 and the drive roller 6, the. is the exit from the second drawing stage, and is carried by the surface of the roller 6 * until it passes through the gap has passed between the pressure roller 7 and the drive roller 6. The rollers 5, 6 and 7 rotate with the same speed, so that the further step between the crevices of the lumps 5 »6 and 6, 7 essentially without Pulling continues «, The length of the next step is selected so that that it is not greater than the effective staple length of the fibers in the roving 8 »

The drawn roving that could get out of the gap between the rollers 6 and 7 is through a. Ring-und-Läüfer winding mechanism twisted and wound into a yarn. The granted to the drawn Having. Twist runs along the gezogenen'Roving in a direction which is the movement in opposite directions from the latter _o The twist is, however, the exit of the second drawing step by the pressure roller 7 and the drive roller 6 of the other stage, which results in substantially no drag, held away.

00982A / 17 88

Bel of the second _n In Flg. 2, if the pressure roller 7 is replaced by a fourth group of rollers, which consists of a pressure roller 9 and a drive roller 10, which is driven at the same speed as the rollers 5, 6, the distance between the columns of the rollers 5 »6 and 9, 10 is chosen so that it is smaller than the effective staple length of the fibers in the roving 8, so that the majority of the fibers in the roving during the run of the roving 8 in each tent point is the distance between the rollers 5,6 and 9 »bridge 10» With this mechanism, the roving 8 is carried completely during its run through the further stage in which no pulling is carried out. Here, too, the twist applied to the drawn roving by the rollers 9-10 is prevented from running back to the exit (that is, the gap between the rollers 5-6) of the second drawing stage.

In the third embodiment, explained in FIG. 3, a double transport device system is used. The upper transport device consists of a roller 12 and a guide ll _t around which a tape 1st set 13, and the lower conveyor device consists of a roller 12a and a guide 11a, around which a tape is laid 13a. The roller 12a is a driven roller that sets the belt 13a in motion. The roller 12 is an idle roller which is driven by frictional contact with the roller 12a. The belt 13 is driven by the roller 12.

The distance between the gap between the rollers 5, 6 and the gap between the belts 13, 13a next to the guides 11, 11a is less than the effective stacking length of the fibers in the roving 8, so that at every instant the distance between the gaps is determined by the majority of the Staple fibers bridged

The rotational speed of the drive roller 12a is synchronized with that of the drive roller 5, so that another Zone is created in which there is practically no pulling.

009824/1788

and the sucked roving completely during the passage « «Wiping the crevices is worn. The drawn roving is then carried by the tapes 13x13a.

The twist applied to the sucked roving is made by the Exit (the 1st the gap between the rolls 5, 6) of the second drawing stage through the gap between the binders 13 * 13a never kept away from the rollers 12, 12a.

The fourth in Flg. 4 is a illustrated embodiment Modification of the device shown in Fig. * 1. The roles 3, 4 are "dt endless belts Ί5, 15a and guides 14, purple, so that a double transport device system" is formed in the second drawing stage.

The invention is illustrated by the following examples explained.

example 1

(a) A roving was prepared by χ 2 2.4 (246 tex) Bovlngstrfinge 100% Sudan cotton staple fibers were plied, wherein the Faeerlängen "wipe 9.6 mm and 4i _t 4 ms variierton.

The roving was made using a device such as "Is indicated in Fig. 1 of the accompanying drawings, processed, however, the role * 7 has been omitted. The first draw stage (x) had a draw ratio of approximately 1.5: 1 and the “wide draw stage (y) had a draw ratio of approximately 15.3: 1, which was a total draw of about 23.

009824/1788

BATH

The first drawing stage (χ) was set to 50.8 mn and the contested drawing stage (y) was from a setting where no crackers were formed in the sucked roving to do an attitude where treatment has become impracticable due to continued cracking build-up, changes.

(b) A similar roving was processed under the same conditions, but according to the invention, the The device shown in Fig. 1 was used with the roller 7.

Results obtained with oils are given in Table I. Table I.

Setting the
second drawing stage
(mn) Aneani aer crackers una inre lang
. (ran) 91 cm of roving each Example l (bi 35.0
33.3
31.7
3O _s 2 Example 1 (a3 without
without '
without
without
without without
2 χ 3.3 2 χ 6.3 Ix 9.6
11 χ 3.3 3 x 6.3 2 xl2.7
3 x 25, * 3 x38, l 1 x5O, 8
not treatable due to
continuous formation of
Crackers

Example 2

(a) A rovirg was made from 100 % wool fibers (64s. Quality Bradford Tops), the fiber length varying between 25.4 and 158.8 ran.

008824/1788

BATH

The roving was made on a device according to Pig. I processed, however, the rollers 3, 4 were omitted so that there was a single drawing stage set so became that a draw ratio of 23: 1 was obtained. The role 7 has also been omitted. The setting the single drawing stage was from a setting in which no crackers were formed in the drawn roving, su a setting where processing was impossible due to the continued formation of crackers, varies. . '

(b) A similar roving was processed under the same conditions but according to the invention, the in Example 2 (a) used device but with the roller was used. The results obtained are in the table 2 specified.

Example ?

(a) A roving was prepared from the staple fibers made of 100% nylon with 3 _s wherein the staple fibers different

Had lengths. The staple fibers were made from a cable

on a Pacific; Converter cutter in variable lengths' cut from 69.8 to 228.6 mm.

009124/1788

Table XX

Setting the
Drawing stage Number of crackers and their length (on)
91 each whether roving Example 2 (b) Example 2 (a) without 139.7 without without IK, 3 eat x 3.3 7 x 6.3 5 x 7.6 2 χ 19.0 2 χ 38.1 4 x5O.8 1 x 76.2 without 101.6 due to ongoing
Cracker formation does not occur · »
workable without 88.9 ditto without 76.2 ditto

V.

Using the apparatus as in Example 2 Ca), the setting of the draw ratio of the single stage being 23 t 1, a roving was processed, the setting of the drawing stage varied from 152.4 to 215.9 · The defect rate in sucked roving or Yarn was noted and reported in Table III. i

(b) A similar roving was processed according to Example 3 <a), however, with the roller 7 attached to the device. The results obtained are shown in Table III specified. . .

911124/1781

Λ.

,1

fr

I r

l; v

Table III

■ insteiitmm © er
Elhbstufe (■■) JUiMiH egg bracker uno your length im)
91 cm of roving each Example 3 (b) W ₉ H
165.1
* O3 »2
«Μ Example 3 U) * x (3.3 to 6.3)
without
without .
without
without untreatable
lahesu ongoing education
«On crackers« it is a
normal length of 25, Ί
up to 506.0 MB
83 x (3.3 to 7J6.2)
15 x (3.3 to 38.1)
* χ (3.3 to 19.0)

Example *

(a) A 1.5 (39 * t * x) roving strand of 100 % "Courtelle" (registered goods xelcnen) aeryl fibers of 3 d / f with a variable fiber length of 55.9 m to 71.1 m was made using an apparatus , as shown in Fig. 1 of the accompanying drawings "processed, in which case the roller 7 has been omitted.

Oils draw ratios in drawing stages (x) and (y) were like this elected that a total of 23 was received

de first drawing stage (x) was set to 76.2 m, and the The wide drawing level (y) was set from a setting of 66.8 • st (i.e. larger than the effective staple fiber! Finge) to cu 57 * 1 (i.e. less than, the effective staple fiber length) varies.

00982 W1788

BAO. ORIGINAL

(b) A similar roving was processed according to Example 4 (a), but with the roll 7 attached to the device. was set «

The results obtained in Examples 4 (a) and 4 (b) are given in Table IV

Table .IV

Setting the
second drawing stage
(mm) Looked! the cracker and
91 cm roving each 1 X their length (at) without 66.8 Example 4 (a) X 2 χ 3.3 3 x 12.7: Example 4 <b) without 63.5 2 x 25.4 1 x 50.8 X x 19.0 2 χ 3.8 2 χ 6.3 1 1 X19.0 2 χ 25.4 3 12.7 without 60.5 1 50.8 1 χ 76.2 38.1 without . 57.2 4 χ 3.3 6 χ 6.3 2 19.0 2 χ 25.4 1 38.1 1 76.2
1 χ 101.4
very many with the shift
the most lengths up to
355.6 mm

Example 5

(a) roving with a weight of 79.65 g / 36.4 m (2178 tex) was 100% 5 ilyeetera tape JL fibers of 3 d produced / f, wherein the Lfinge ter parsers are from 50.8 to 196, 8 mm varied. This roving was processed on the method described in Example 2 (a), where 31e setting the "one? Zieistu ·: -? s? wisc; hen 127.0 and t? 7 _t 8 mm was changed.

/, / 1 7 ο ί>

BAD OFHGiNAL

(b) A similar roving was made according to Example 5 (a) and 5 (b) processed. The results are given in Table V.

Table V

Setting the
Drawtufβ (im) Number of crackers and their lungs (mm)
91 cm of roving each Example 5 (b) 127.0
152.4
177.8 Example 5 (a) without
without
Without 1 χ 19.0 2 χ 55.8 1 xll4.3
1 x292, l 1 χ 4 * 4.5
1 χ 12.7 3 x 38.1 1 χ 63.5
1 χ 76.2
1 χ 3.3 1 x 6.3 2 χ 12.7

Example 6

A roving with a weight of 79.65 g / 36.4 m (2178 tex) was made from a mixture of 55 GeWo? 3 d / f polyester staple fibers and 45% by weight of wool fibers Fibers in the mixed roving had lengths between 31.7 mn and 158.7 mm.

This roving was based on that described in Example 2 (a) Device processed, 'being the setting of the singles Drawing step was changed between 114.3 m and 165.1 mm "

(b) A similar roving was processed according to Example 6 (a), wherein, however, the roller 7 is attached to the device became.

009824 / 1.788

BATH

The results obtained in Examples 6 (a) and 6 (b) are given in table ■ VI

Table VZ

Setting the
Drawing step (mm) Selection of the crackers and their length {asu
91 ce roving each Example 6 (b) «4.3
139.7
165.1 Example 6 (a) without
without
without 1 χ 12.7 Ix 50.8 1 xl01.6
2 χ 114.3 2 xl52.4 1 χ 254, C
1 χ 30 *, 8 1 χ 381.0
1 χ 3.3 * x 12.7 2 χ 6.3
2 χ 19.0 5 χ 25.4 3 x 38.1
1 χ 50.8 3 x 76.2
1 χ 3.3 3 χ 12.7 3 * 19.0
1 * χ 50.8

Examples 7-10

These examples explain the production of staple fiber yarns from 0.75 (788 tex) roving strands, which are suspended from various mixtures of polyester * and cotton staple fibers of different lengths. The device was of the type shown in FIG. 4 of the accompanying drawing (Examples 7 (a) to 10 {«)> · for Examples 7 (b) to 10 (b) the roller 7 was omitted * The drawing stages were set to 50.6 nm (first stage) and 43.2 nm (sweite Drawing stage), what btrJcCCwüiche Blr.etellungen xum spinning of rovings au "33, i pss long staple .. fibers are * The total sugar used was t $ ₉

BATH

i material mixture 50 Cfe) U) τ 9 50 t 75 unpinable no
cracker 8th 3 d / f χ 50.8 mi /
d / fx 38.1 mi 25: 90 ■ M. 9 9 d / f χ 50 * 8 μ
d / f χ 38.1 μ 10: 98 many
cracker « 10 ι /
I. 2 * ί occasionally
che crackers N
υ d / f χ 50.8 Mi /
d / f χ 38.1 μ d / f χ 50.8 mi /
d / f χ 38.1 μ

Example 11

After using the device (a) from Pig * $ and (b) without Holle 7, polyethylene terephthalate / Beusci ^ ll-Mieohro length (0.7? strand * 788 tex) "oak fa8 © ro kit (llx> r & 8figen contained in Yarns processed. The settings of the Zlehatufen itaren in such a way, "le ale in the examples ? 10 er-" ended. The total Zlehverhfiltnis was 32 "The dimension of each roving was 67 % 2 d / f χ 38.1 mm Polyethylene terephthalate staple fibers, 33 % Alcala cottonseed staple fibers and 2% (based on the weight of the polyester / BauMfOll vase) 2 d / f χ 50.8 mm polyethylene terephthalate staple fibers ndt ascender length.

The results showed that those using the (a) Yarns obtained from the device described above contained no crackers while the yarns obtained using of device (b) above contained occasional crackers.

BAD 0RK3H * iAL

In each of Examples 1 to 11, the sucked roving was twisted and wound up as a yarn, with a ring-and-traveler winding mechanism was used. The spindle speed of the Aufspulneenanlsnuses and the Oewleht of the The runner used were as follows in the examples:

seisp. spindle speed u / mm Laurergewic & t IgJ 1 1750 0.048 2 1500 0.172 3 1500 0.172 4th 1750 0.048 5 900 0.358 6th 1500 0.048 7th 6000 0.018 8th 6000 0.018 9 6000 0.018 IO 6000 0.018 11th 6000 0.078

In each example, the spacing between the columns of rolls 5 »6 and rolls 7.6 by 19.0. mm set

In order to produce a high quality yarn, it is desirable to set the device according to the invention in such a way that the roving emerging from the exit of the last stage does not touch any crimped surface of a roll or tape on its way to the winding mechanism the force applied when soaked roving twist to sum Off · recedes runs the letsten stage without 'will have a surface daft _t runs thereby reducing the likelihood of Fehlem that occur due to Unregelmäßigkelten upper decreased ·

009824/1788

BATH

Claims (12)

PATENT CLAIMS IJ Process for the manufacture of a yarn from a Staple fibers existing roving, in which the roving is passed through at least one stage in which it is subjected to a drawing process, and in which the drawn ne roving is twisted to form a yarn, characterized in that the twist is retained by . The drawn roving is passed through a further stage in which it is practically not drawn and is fully worn during the passage 2. The method according to claim 1, characterized in that the roving through two successive drawing stages is passed, subjecting it to a greater pull in one stage than the other, whereupon it is passed through the further stage in which essentially none Pulling takes place. 3 · The method according to claim 2, characterized in that the draw ratio of the first stage is less than the draw ratio of the second stage. 4. The method according to any one of the preceding claims, characterized in that the roving from which the yarn * is made »from synthetic, artificial or natural staple fibers or from mixtures thereof. 5. The method according to claim 4, characterized in that polyester and polyamide fibers, cellulose fibers as man-made fibers, and cellulosic fibers as natural 009824/1788 BAD ORIQINAt. - ■ 22 - · Fibers Wool and cotton fibers are used 6. Process for the production of a staple fiber yarn from a roving made of staple fibers of the cotton type, in which the roving during its passage through two consecutive Steps is sucked, with one step having a higher draw ratio than the other step, thereby characterized in that the drawn roving through a further step with a length no greater than the effective • Staple length of the fibers in the roving is passed through, in which the sucked roving is practically no longer sucked, whereupon the sucked roving is twisted and in the form of a Yarn is wound up. 7. Apparatus for producing a yarn from a roving consisting of staple fibers, characterized in that »it The following parts are to be found «Facility that contains at least one The drawing stage for the roving forms, a twining device that can apply a twist to the drawn roving, and a device that retains the twist and so acts, daft the already drawn roving is practically no longer drawn and that the drawn material during its course of the only or the last drawing stage up to the place »at by applying the twist to the drawn roving by means of the twisting device will. ■ "", ■■ 8. Apparatus according to claim 7, characterized in that it has two drawing stages. ^f ■ 9. Device according to claim 8, characterized in that that the two drawing stages consist of three groups of rollers, each group consisting of a pressure roller and a j 00SI24 / 1788 h 1956A50 Driving role consists and the groups with different Speeds can be set in rotation by the drawing ratios required for the two drawing stages are defined 10 · Device according to claim 9 »characterized in that da * systems with endless ties instead of some or all ι role groups are used · 11 · Device according to one of the speeches 7 to 10, g daduroh gekennstlehnet, daft the establishment sub withholding the winding from a single roller or from a pressure roller and drive roller or from a pair of conveyor belts consists that after the single or roof of the last Draw stage are arranged. 12. Device according to one of claims 7 to 11, characterized in that the ZHrlrnungelnrichtung from tines! Ring-and-traveler winding mechanism consists of II. ^ Li * hvorrlchtung sur manufacture of staple fiber yarns aas a group consisting of staple fibers of the Baunwolltype Moving, characterized in that they daft following parts etc. comprises: a device for feeding a roving, three groups of rolls, each group consisting of a pressure roll and a drive roller arranged and arranged to run at certain speeds are driven in such a way that swel drawing stages are formed, one having a higher drawing ratio than the other has a fourth pressure roller and an »- driving role for this, which is arranged so that it BiIt the third group tier is one of three role groups third drawing stage forms, which drawing stage does not have a length 009824/1788 1956 ^ 50 2k - greater than the effective staple length of the fibers in the hoving and works in such a way that the fourth pressure roller has a speed ratio of 1: 1 the third pressure roller, and a device for twisting and winding up the drawn roving as yarn «, 1 * 1 ο device according to claim 13 »characterized in that that the third and fourth pressure rollers are driven by a common drive roller. PAnNTANWKlTE M.-ING.H. FINCKE, DIPI.-ING. H. BOHl DIfL-ING. S. STAEOa 009824/1788 BATH ORIGINAL