US3724039A

US3724039A - Yarn texturizing apparatus and process

Info

Publication number: US3724039A
Application number: US00133054A
Authority: US
Inventors: H Li; D Prevorsek; N Rothmayer
Original assignee: Allied Chemical Corp
Current assignee: Honeywell International Inc
Priority date: 1971-04-12
Filing date: 1971-04-12
Publication date: 1973-04-03
Anticipated expiration: 1990-04-03
Also published as: DE2216023A1; FR2136354A5; IT954640B

Abstract

Apparatus and process for preventing the individual wraps of yarn from entangling as multiple wraps of a continuous length of yarn is texturized at high speeds by guiding the yarn under controlled tension and temperature in frictional engagement with a texturizing element which advances in the same direction as, but at different relative speeds with respect to, the moving yarn.

Description

O United States Patent 1191 1111 3,724,039

Li et al. 1451 Apr. 3, 1973 [54] YARN TEXTURIZING APPARATUS [56] References Cited AND PROCESS UNITED STATES PATENTS [75] Invemm: Lang ParsiPPaW; 2,553 127 5/1951 Barker .......2s/71.3 Prevomk, 2,622,182 12 1952 Forzleg et 31.... ..28/62 x York Rothmayer, Madison, al of 2,921,358 H1960 Cox et al. ..28/l.5 NJ. 3,619,874 11/1971 Li et al. ..28/1.5

[73] Assignee: Allied Chemical Corporation, New Primary Examiner Louis K. Rimmdt York Attorney-Arthur J. Plantamura et al. [22] Filed: Apr. 12, 1971 [57] ABSTRACT [21] Appl. N0.: 133,054

Apparatus and process for preventing the individual wraps of yarn from entangling as multiple wraps of a [52] US. Cl ..28/L5, 28/7213 ontinuous length of yarn is texturized at high speeds [51] Int. Cl. ..D02g 1/10 by guiding the yarn under controlled tension and tem- [58] Field of Search ..28/l.5, 1.3, 62, 71.3, 72.13, perature in frictional engagement with a texturizing element which advances in the same direction as, but

at different relative speeds with respect to, the moving yarn.

12 Claims, 10 Drawing Figures PAINTED 7 3,724,039 sum 1 OF 2 INVENTORS HSIN G Ll D N REV EK N Y. ROTHM R TORNEY PATENTEIJAPR3 ma 3.724.039

SHEET 2 OF 2 INVE RS HSIN LAN DUSAN C. PREVOR K NOEL Y. ROTHMAY WWW TORNEY 1 YARN TEXTURIZING APPARATUS AND PROCESS BACKGROUND OF THE INVENTION This invention relates to apparatus and process for making textured textile yarns by drawing the yarn at a relatively greater speed than, and in engagement with, a rotating texturizing element as disclosed in the pending commonly assigned US. Pat. application of Li, et al. Ser. No. 3,444 filed on Jan. 16, 1970 now US. Pat. No. 3,619,874, and more particularly with a device comprising an improvement thereover which substantially lessens entanglement and breakage of the yarn.

While it has been known for many years that a thermoplastic yarn drawn under tension in a sharp angular path about a stationary edge positioned at the apex of the angle will impart texture to said yarn, as disclosed for example in US. Pat. Nos. 2,919,543; 2,921,358; 3,025,584; and 3,325,988, the use of a texturizing element which moves in the direction of travel of the yarn as thereby permits substantially increased processing speeds as disclosed in said application US. Pat. No. 3,619,874 is a fairly recent development. In processing with the rotating texturizing element as disclosed in said application US. Pat. No. 3,619,874, a plurality of wraps, e.g., sometimes 50 or 100 or more wraps, of the yarn may be employed to provide the desired texture on the yarn. These relatively higher speeds and multiple wrapping around the texturizing element may result in increased tendency for the yarn to tangle and break. The aim of the present invention is to afford a novel arrangement which uniformly advances the yarn along the length of the texturizing element and substantially lessens entanglement of the yarn.

SUMMARY OF THE INVENTION We have discovered that the entanglement and breakage problems can be overcome by providing means to keep each of the individual wraps or windings of the many wraps of yarn continuously moving away from a prior wrap and thereby prevent one winding of the yarn from overlapping a prior winding. This separation of windings is effected by a suitable configuration, properly disposed, of the texturizing element and/or a rotating driven godet or helical screw or other inclined feed advance means which effects a lateral movement of each of the several windings of the yarn so that it does not interfere with a subsequent winding.

In essence, the apparatus comprises a rotating texturizing element, e.g., a blade or taut wire, over which a plurality of wraps of the yarn are frictionally drawn and which moves in the same direction as the yarn and whose rate of movement is coordinated or synchronized with the movement of the yarn and a lateral feed means which may include an inclined texturizing blade, a tapered godet roll, or a helical screw to preclude substantial overlap ofsubsequent wraps of yarn which are wound around the rotating texturizer.

It is an object of the invention to provide a novel method and an apparatus for preventing entanglement of yarn in the production of texturized thermoplastic yarn by wrapping said yarn a plurality of times around a rotating texturizing element and the rotating driven godet.

The foregoing and additional objects are accomplished by means of an arrangement that progressively feeds the yarn laterally while under tension so that prior wraps are advanced laterally and are thereby displaced from the position where they initially engage the texturizing element or godet so that subsequent wraps are not superimposed; this separates the several wraps and substantially lessens the tendency for yarn entanglement.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described with reference to the accompanying drawings in which:

FIG. la and FIG. 1b represent a schematic side view and an end view respectively of one embodiment of the invention illustrating a tilted texturizing element, as well as an optional separator roller to aid in separating the individual wraps of the yarn around the texturizing apparatus;

FIG. 2 represents a schematic side view of another embodiment of the invention in which the surface of the godet is treated to effect variation of frictional characteristics;

FIG. 3 represents a schematic side view of still another embodiment of the invention in which a separator screw is utilized in conjunction with a rotating texturizing element to accomplish yarn separation;

FIG. 4 represents a schematic side view of still another embodiment in which the yarn wraps are kept separate by means of a rotating tapered driven godet,

FIG. 5 represents a schematic side view of another embodiment in which the tapered godet is helically grooved to facilitate yarn separation;

FIG. 6 represents a schematic side view of another embodiment in which the rotating tapered driven godet, in conjunction with a tilted rotating texturizing element is utilized to facilitate yarn separation;

FIG. 7a and FIG. 7!; represent a schematic view and an end view respectively of still another embodiment illustrating the rotating texturizing edge tilted in two directions, i.e., in the X and Z axis;

FIG. 8 represents a schematic side view of another embodiment illustrating a pair of rotating texturizing edges and a modified rotating driven godet utilizing a tapered flange at one end.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is directed to an improvement which affords superior quality and greater efficiency in the technique of high-speed texturizing of textile yarns, wherein a yarn, while heated under tension, is drawn in frictional engagement with the texturizing element which imparts a crimp to the yarn; both the yarn and the texturizing element are advanced in the same direction as the yarn is being texturized. This technique is described in greater detail in the above-mentioned US. Pat. No. 3,619,874. The present invention substantially obviates the tendency of entanglement or breakage in this high-speed process. For better particularity, the texturizing element may also be referred to as knife edge or blade as so used and maybe considered synonymous; however, it will be understood that any other suitable texturizing element such as a wire, a plain or knurled bar, file, and the like, may be used as the element with which the filament or yarn comes into frictional engagement and is crimped or texturized. Also, while details of a heater for the yarn blade as shown in the aforementioned U.S. Pat. No. 3,619,874.

Referring to FIG. 1 of the drawing, a schematic arrangement which comprises a godet 20 with the desired surface finish 21 mounted on shaft 22, a texturizing element 23 and a separator element 27 are shown in operable relationship to texturize yarn which is passed thereover. The separator element or roller may be disposed at any suitable angular position relative to the texturizing element, i.e., while it is shown at approximately 180 removed from element 23, it may be located contiguous to the

element

23 or 45 or 90 removed, for example. As shown, yarn 29, which is to be texturized, is taken from the yarn supply (not shown) which may comprise a storage bobbin or may be supplied without prior storage from conventional extruding apparatus (not shown) after suitable routine pretreatment such as extrusion or drawing of the yarn. The yarn 29 is passed through tension regulating device 33 of a kind well known in the art and is wrapped around the godet 20, which may be either heated or cooled, as required, the texturizing element 23, which also may be heated or cooled, and optionally the rotating separator element 27. Each of the

elements

20, 23 and 27 is suitably mounted so that rotation of the driven godet 20 may be driven at different relative speeds with respect to the texturizing element 23 (and separator element 27 when present). The pair of

bearing assemblies

25 and 26 are shown which permit shaft 22 to rotate independently from mounting 24 for texturizing element 23 and mounting 28 for the separator element. The yarn at 29, after passing one or more times around the assembly of driven rotating godet 20, heater (not shown) and texturizing element '23, is withdrawn at 32. Yarn separation is achieved by the tilted angle of rotating element 23 aided optionally by separator element 27. Optionally, yarn separation may also be aided by means of an eccentric cam 34 synchronized with the rotating texturizing element 23 via shaft 35 by conventional mechanical means (not shown). As the texturizing element 23 rotates at some point, yarn 29 is engaged by cam 34 in such a manner that it is held at a position corresponding laterally to the high point of the cam 34A furthest away from the prior wrap. As element 23 rotates, the yarn moves laterally from 30 to 31. At the same time, the cam rotation permits the yarn entering the process to move to a position corresponding to the cams low point 34B. As the element 23 rotates into position to engage the entering yarn 29, the cam 34 has rotated to such a position-that it holds the yarn furthest away from the previous wrap, and the process repeats. A configuration of the texturizing element 23 may have several forms, i.e., it may be a knife blade, a wire, or even a square bar; it may be heated or it may be in contact with, or mounted contiguously to, a heater to form a rotating heaterblade assembly. Similarly, the separating element 27 may take several forms in addition to the circular one shown. It may have a cross-section which is elliptical or egg-shaped and equipped with various surface friction characteristics. The essential structural parts of the yarn wrap-controlling arrangement resides in the central driven rotating godet 20, the heater (not shown) and the rotating texturizing element 23. In the process of texturizing, the central driven rotating godet 20 and the texturizing element 23 rotate in the same direction but at a different angular surface velocity. The driven rotating godet whose surface 21 may be prepared to control the friction forces on the yarn supplies the yarn into the texturizing zone and also pulls the yarn away from the texturizing zone. The angle of the texturizing element 23 is appropriately arranged so that the first wrap of yarn 30 is advanced from the initial position on the driven rotating godet roll and blade to an advanced position 31, etc., as the arrangement rotates in order to accommodate a subsequent wrapped yarn without entangling. For a fuller understanding of the invention, it is important to note that the treatment of the yarn by use of a plurality of wraps around a rotating texturizing element in accordance with the invention produces a yarn which is crimped or textured in sections, that is, with each wrap a segment of the yarn is textured so that to obtain a fully, i.e., percent textured yarn, it is necessary to synchronize the relative speed between the driven rotating godet and the texturizing element and also to apply a suitable number of wraps to produce the desired result. Under these conditions, the uncrimped portion of the yarn, which has not been brought in contact with the texturizing element during the process, can be crimped on a subsequent wrap or wraps. The length of the crimp position may be increased by increasing the number of wraps and, indeed, more than 100 percent crimping or superimposed crimping is possible, if desired, that is, recrimping an already crimped section. In order to obtain a continuously texturized yarn, the following expression may be used to compute the desired number of wraps n: n velocity of yarn/(velocity of yarn velocity of blade) As can be seen from this expression, the number of wraps required to achieve a complete crimp increases with the crimping element to yarn velocity ratio and decreases with increasing difference between the yarn and crimping element velocity. For example, in a process where the yarn speed is on the order of 3,000 ft./min. and the differential speed between the yarn and blade is 30 ft./min., the number of wraps required to produce a continuous desirable level of crimp will be in the order of 100 wraps. Because the degree of texture produced by passage over the texturizing edge depends on a number of factors, including for example the temperature of the edge, the yarn tension, and the geometry of the edge in contact with the yarn, entrance and exit angles of the yarn with respect to the texturizing edge, etc., it is necessary to maintain these processing conditions, e.g., temperature, tension, geometry, etc., as constant as possible over the entire operation so as to apply minimum variation and conditioning from wrap to wrap. Apart from these factors, however, the overlapping of fibers an/or nonuniform sliding of the yarn from the entrance to the exit portion of the edge considerably hampers consistently good product processing. The yarn overlapping also leads to yarn breakage which is a serious problem because of the resulting production down-time. By use of feed advancing surfaces, as shown by and described in connection with FIG. 1 and by the embodiments shown by the figures hereinafter described in detail, entanglement of the yarn may be substantially obviated.

The embodiments shown in FIG. 2 utilizes a godet surface which has a very low coefficient of friction at the entrance zone in order to minimize the chance for overlapping of the initial wraps of the yarn. In addition, a low friction zone on the discharge end reduces the possibility of yarn breaks due to tension increase. Where low coefficient of friction surface is employed, the overlapping of the first wrap with the other wraps can be either eliminated or substantially reduced. As shown in FIG. 2, a rotating driven godet 36 mounted on shaft 39 and rotating in bearing 40 which has a low friction portion 38 and a relatively higher friction surface 37 is utilized. The driven rotating godet 36 is suitably mounted so as to rotate on a shaft 39 and a crimping element 41 suitably mounted at 42 on the bearing 50 which permits the texturizing element 41 to rotate at a differential speed around the driven rotating godet 36. The yarn 43 is fed through a tension gate 44 and makes

several wraps

45, 46, 47 and 48 around the driven rotating godet 36 and texturizing element 41 and is withdrawn at least partially texturized at 49. Since the low friction surface of the godet does not provide a good control of yarn tension and forward motion is necessary, the low friction surface 38 is kept very narrow, the sections of the yarn where the crimping is carried out, however, are wrapped around a relatively higher friction section 37 of the driven rotating godet to avoid any slippage between the yarn and the godet surface during texturizing operation. Illustratively, the low friction area, i.e., the yarn inlet zone or discharge zone, may be coated with a material which provides minimum friction such as polytetrafluoroethylene while the higher friction zone may be coated with chrome or with a rubbery material for example. In accordance with the invention, the separation of the yarn to prevent entanglement can be achieved not only by an inclined texturizing element, as described in conjunction with FIG. 1 and FIG. 2 or by an inclined tapered godet, as illustrated in conjunction with FIG. 4, but also by a positive driving of the yarn along the godet as shown in conjunction with FIG. 3 and FIG. 5.

The use of a positive method to keep the yarn separated is shown in FIG. 3. The separation of the various wraps of the yarn and lateral movement of the yarn is achieved by means of a direct contact of the yarn with a surface which maintains separation of and guides and advances the wraps of yarn. As shown schematically in FIG. 3, a yarn separator screw 57, which is provided with helical grooves or threads, is positioned contiguous to the texturizing element 56. The wraps of yarn travel within these helical grooves. The separator screw 57 is arranged to rotate only around the godet axis 55 and not around its own axis .62. The godet 54 is suitably mounted in the bearings 61, while the mounting 59 for the separator screw 57 and texturizing element 56 rotates in the bearing assembly 60 around bearing assembly 61. It is important to note that, during the crimping process as the separator screw 57 and blade 56 rotate, the separator screw 57 does not revolve around its own axis while rotating around the axis of the godet. In other words, while the texturizing element 56 is constantly disposed away from the godet 54, so that when the blade 56 has turned 180 degrees from the northerly facing position as shown in FIG. 3, the blade faces north, a given point on the surface of separator screw 57 does not rotate in this manner. Instead, while screw 57 has itself turned and is positioned 180 degrees (from the position shown in FIG. 3) with respect to the axis 55 of godet 54, a given point on the screw 57 continues to face in a northerly direction. As seen in FIG. 3, an arrangement comprising a timing belt 63 is suitably arranged to connect

pulleys

64 and 65, neither of which rotates about its axis. Pulley 65 is mounted in a locked position on axis 55, so that axis 55 rotates within pulley 6S. Pulley 64 is mounted so that it rotates only about the axis 55 of the screw and not about its own axis. It is thus seen that the yarn 67 which is fed through the tension gate 68 makes

several wraps

69, 70, 71, 72, 73 and 74 around the driven rotating godet and texturizing element-separator screw assembly and is then withdrawn as a textured yarn 75. Because of the positive drive afforded by the helical grooves in the separator screw 57, the separator arrangement of FIG. 3 may be modified so that, instead of the angularly, i.e., tilted,

assembly

56 and 57, the texturizing element and separator screw may be positioned horizontally as shown in phantom by the elements 7.6 and 77, respectively.

Illustrated in FIG. 4 is an embodiment which utilizes a tapered godet 80. As seen, the yarn separation and sideways translation of the various wraps of the yarn is achieved by modifying the profile of the central godet. The texturizing element 83 is suitably mounted at 84 on a bearing assembly 85, which is concentrically positioned over bearing assembly 86 within which shaft 82 for godet rotates. It is thus seen that, as yarn 87 passes through tension gate 88 and over the driven rotating godet and texturizing element 83, the

several wraps

89, 90, 91 and 92 progressively move to the right as the godet and the texturizing element rotate, which in turn substantially eliminates the tendency for overlap and entanglement. The texturized yarn is shown withdrawn at 93. I

The arrangement shown in FIG. 5 utilizes a threaded godet. We have found that under conditions where the tendency for overlapping is relatively high (e.g., highdenier multifilament yarn) it may be desirable to keep the yarn separated physically during a larger segment of each wrap. This can be achieved by threading the godet as shown schematically in FIG. 5. The depth and width of the helical grooves 101 on godet may be varied depending on the yarn denier and the number of wraps and other processing conditions. It is also ap parent that the use of threaded godet may be applied to a cylindrical godet as shown in phantom at 102, as well as to a cone-shaped godet 100. In the arrangement shown in FIG. 5, the godet is-suitably mounted for rotation on axis 103 set in bearing assembly 107. The texturizing element 104 mounted at 105 is arranged to rotate around axis 103 in bearing assembly 106. As shown, yarn 108 is fed through tension gate 109 and wrapped a suitable number of times, two of which are shown at 110 and 111, around godet 100 and texturizng element 104 and withdrawn after a suitable number of turns in textured condition at 112.

In the embodiment depicted in FIG. 6, a tapered godet, as well as a tilted texturizing element, is shown with the angles from horizontal slightly exaggerated for emphasis. It will be apparent that only a moderate departure from the horizontal may suffice depending upon the variable factors utilized such as tension, temperature, denier of the yarn, etc. The driven rotating godet 120 which may have a plain or grooved surface 121 is mounted on shaft 122 which is set in bearing assembly 126. Rotating around this axis is texturizing element 123 suitably mounted at 124 on bearing assembly 125. The yarn to be crimped is fed at 127 through tension gate 128 and makes a plurality of

wraps

129 and 130 around godet 120 and knife 123 and is withdrawn in a textured condition at 131.

In the arrangement of FIG. 7a, the yarn separation is achieved by proper inclination and rotation of the texturizing element angle with respect to the godet axis. FIG. 7b shows the end view of the rotating texturizer where a and b are the points where the yarn makes initial and final contact with the texturizing element which is rotated to the godet axis 138. The included angle, alpha, is the angle between the horizontal godet axis 138 and the angle the axis of the blade element 139 makes with the horizontal plane. For instance, if alpha equals zero degrees, no yarn separation occurs. If the angle alpha is large, say degrees, good yarn separation is achieved. However, the filaments may be wrapped very loosely around the driven rotating godet and the texturizing element. This may result in either poor texturizing performance, i.e., poor crimp, or yarn breakage. To offset this, it may be desirable to pivot the end 150 of texturizing element 139 out of the inclined plane which it forms with the axis of shaft 138. This may be utilized to take up any undesirable slack which may occur in the subsequent wraps as the yarn proceeds from left to right as shown in FIG. 7a. FIG. 7b shows the end view of the rotating texturizing element, pointsa and b representing points along the texturizing element 139. It is thus seen that yarn fed at 143 through tension gate 144 makes a plurality of wraps over godet 136 and texturizing element 139, four

wraps

145, 146, 147 and 148 being shown, and thereafter the texturized product was withdrawn at 149. The driven rotating godet 136 is suitably mounted on, axis 138 which rotates in bearing assembly 142 concentrically mounted on bearing assembly 141 for texturizing element support 140.

In the embodiment of FIG. 8, an assembly comprising a driven rotating godet 155 provided with flanged portions 156 and 158 and a tapered segment 159 is used in conjunction with a plurality of texturizing elements, two of which 161 and 162 are shown. The godet is arranged to rotate on an axis 157 on bearing assembly 165. The texturizing elements are arranged in a cage-like assembly so that they are supported at one end at 166 in the support member 163 which in turn is arranged to be driven through bearing assembly 164. The cage assembly rotates on bearings 16 and 169 mounted on the rotating godet so that the cage-like assembly rotates at relatively different speed than the driven rotating godet. The other ends of the

texturizing elements

161 and 162 are supported by mounting 167 on bearing 169. A suitable drive for rotating the godet 155 and

texturizing elements

161 and 162 at relative speeds is shown generally at 176. It is thus seen that yarn fed at 170 through tension gate 171 passes over the driven rotating godet and texturizing elements contacting the tapered portion 159 which relatively abruptly moves the yarn to the right thus avoiding entanglement with subsequent wraps until it contacts the horizontal segment or cylindrical portion of the godet when it is moved to the right at a more gradual pace by proper adjustment of the texturizing elements as indicated previously, three

wraps

172, 173 and 174 of the yarn being shown. The textured yarn is removed at 175.

Various modifications will be apparent to one skilled in the art, and it is not intended that this invention be limited to the details in the specific drawings and description and by way of illustration. Also, while particulars regarding the drive of the texturizing element and the godet, as well as the means for hearing the yarn at the texturizing point or on the godet, have not been either specified in detail or shown in the figures, such means are set forth in the aforementioned U.S. Pat. No. 3,619,874 and may be applied with appropriate modifications so as to accommodate the embodiments of the present invention. Accordingly, the invention is not to be limited, except to the extent necessitated by the express recitation of the appended claims.

We claim:

1. In an apparatus for texturizing yarn comprising in combination a driven rotating godet for said yarn and a texturizing element which rotates around said godet and over which a plurality of wraps of said yarn moving at a differential speed relative to said element are drawn in frictional engagement, the improvement comprising yarn advancing means to transport the yarn laterally over the texturizing surface over which said yarn is drawn in frictional engagement, said advancing means comprising an elongated texturizing element whose edge is inclined with respect to the godet axis whereby subsequent wraps of yarn are guided laterally away from the feed yarn contact position on said godet and texturizing element thereby inhibiting overlapping of subsequent wraps of said yarn during the texturizing operations.

2. The apparatus of claim 1 in which the godet is provided with a yarn advancing surface in which the coefficient of friction of the initial contact surface area of the godet is relatively less than the coefficient of friction of the advanced areas of the godet.

3. The apparatus of claim 1, wherein the means affording the yarn advancing surface comprises said inclined texturizing element in combination with a tapered godet.

4. The apparatus of claim 1, wherein the means affording the yarn advancing surface comprises a helically grooved separator screw moving with the same angular velocity as, and in combination with, the texturizing element.

5. The apparatus of claim 1, wherein the means affording the yarn advancing surface comprises a heli- 7. The apparatus of claim 1 in which a cam is employed to deposit the feed yarn to be texturized at a specific contact position on said apparatus.

8. The apparatus of claim 1 which includes a separator roll mounted on the same assembly as the texturizing element and moving with the same angular velocity as the rotating texturizing element.

9. The apparatus of claim 1, wherein the texturizing element comprises a plurality of texturizing blades mounted in a rotary assembly which houses centrally therein the godet.

10. The apparatus of claim 9, wherein the godet is essentially cylindrical and is provided with a tapered flange upon which the yarn feed is initiated before it progresses onto said godet.

11. A method for texturizing and advancing yarn by passing a plurality of wraps of the yarn over a combination of a driven rotating godet and (b) an elongated texturizing element whose rotation is coordinated with the rotation of (a) but whose linear movement is at a relatively different rate comprising inclining the edge of said texturizing element so that it approaches the axis of said godet as the yarn is advanced thereby positively advancing said yarn laterally on the godet-texturizing element assembly so that subsequent wraps of yarn fed onto a given contact position on said combination godet and texturizing element are progressively ad-

Claims

5. The apparatus of claim 1, wherein the means affording the yarn advancing surface comprises a helically grooved godet in combination with the texturizing element.

6. The apparatus of claim 1, wherein the means affording the yarn advancing surface comprises a tapered and helically grooved godet in combination with the texturizing element.

7. The apparatus of claim 1 in which a cam is employed to deposit the feed yarn to be texturized at a specific contact position on said apparatus.

11. A method for texturizing and advancing yarn by passing a plurality of wraps of the yarn over a combination of a driven rotating godet and (b) an elongated texturizing element whose rotation is coordinated with the rotation of (a) but whose linear movement is at a relatively different rate comprising inclining the edge of said texturizing element so that it approaches the axis of said godet as the yarn is advanced thereby positively advancing said yarn laterally on the godet-texturizing element assembly so that subsequent wraps of yarn fed onto a given contact position on said combination godet and texturizing element are progressively advanced from said contact position until the withdrawal position from said combination thereby substantially precluding overlapping of said wraps and entanglement of the yarn passed over the combination.

12. The method of claim 11, wherein the yarn is advanced by winding said yarn over a rotating helical screw whose axis is essentially in parallel alignment with the axis of the godet, said screw arranged so that a given point on the surface of the screw faces in the same direction while the screw rotates around the axis of the rotating godet.