JPH0317939B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method and apparatus, including a fluid jet device, for intertwining the filaments of a continuous filament yarn, such as by piling together a large number of yarns, to create a large cohesive yarn. More particularly, the present invention relates to an apparatus and method including a cylindrical guide for guiding yarn to a fluid jet filament entangling device. Fluid jet entangling devices are used to create untwisted cohesive yarns and to intertwine multiple yarns into a single cohesive yarn having filaments with varying degrees of entanglement with each other. It has been used for a long time. For example, US Patent No.
See No. 3364537 (Bunting and Nelson). The filaments of such yarns can be entangled to varying degrees, from slightly to significantly entangled, depending on the component yarns, the design of the equipment, and the severity of the entangling conditions. Therefore, this method ranges from plying thin threads to make thick threads, i.e. doubling, to plying differently colored or colorable threads to make them bulky or non-bulky. It can be used in a variety of applications such as making mixed color styling yarns, such as marl yarns or mixed color yarns. U.S. Patent No. 4069565 (Negi-shi)
describes an apparatus and method for producing a textured multifilament yarn with tight and open sections alternating along its length. In this method, a running bundle of filaments is brought into contact with two bent members spaced longitudinally from one another in such a way that the threads are bent at each point of contact. The travel path of the filament is created by applying tension to the entire space between the two members. At least one fluid stream is then directed to the bundle within the path.
The bundle is sprayed from one side, causing the individual filaments of the bundle to vibrate and intermingle randomly across the direction of the ejected fluid stream. For effective operation, the thread line must be bent at each point of contact, both above and below the entanglement area. The position of the fluid flow between the contact points is also said to be critical, preferably at the midpoint. In U.S. Pat. No. 4,059,873, a number of crimped continuous filament yarns of different colors and/or dyeability are prepared by disentangling the filaments to substantially remove cohesiveness of the yarns. A method is described for making bulky continuous filament mixed color yarns by feeding them into an entanglement zone and drawing the interlaced yarns therefrom at a rate slower than the rate of feed to the entanglement zone.
The fluid flow not only entangles the filaments, but also advances the resulting threads from the entanglement area. It is shown that the yarn is bent substantially at right angles to the path of the yarn as it enters and exits the entanglement area. It is an object of the present invention to provide an improved method (and apparatus) for making cohesive yarns, especially bulky yarns, using a fluid jet device that does not require bending the path of the yarn as it enters or exits the area. ). Another object of the invention is to provide a labor-saving and efficient method for piling yarns, especially bulky mixed color dyeable carpet yarns, and an economical method which can be operated at high yarn speeds. That's true. According to the invention, the process comprises: (a) entangling the filaments in a mid-region by means of a fluid jet having a yarn inlet and a yarn outlet, between which a closed yarn passage preferably having a substantially cylindrical shape; (b) preventing lateral filament vibration above the area; (c) subjecting the at least one yarn to at least one high velocity compression in the path; A method of intertwining at least one multifilament thread, comprising: (i) impinging a fluid jet to vibrate and entangle the filaments; and (d) finally withdrawing the thread from the area. advancing the yarn into the area along a path substantially coaxial with the passage; (ii) preventing lateral filament vibration;
At a point proximate but remote from the entrance of the thread, extending from the beginning of the section and continuing coaxially along the path for a distance of at least 3 inches above the remote point. (iii) the withdrawal of the thread from the area is carried out along a path that is substantially coaxial with the passage; An improved method is provided. The present invention is particularly effective and economical when a single jet of compressed fluid with a cross-sectional area narrower than the yarn path is impinged perpendicularly to the yarn path, particularly at yarn speeds of about 1500 ypm (1371 mpm) or higher. be. Furthermore, the method of the present invention is particularly effective and useful for converting a large number of non-cohesive yarns or yarns with low cohesiveness into a single highly cohesive yarn with a large denier, that is, for duplication. A preferred use of this method is to combine bulky yarns with different dyeing properties to produce mixed colored yarns, such as marl yarns with any degree of color mixture, from very bright to vague. Or to make mixed color yarn. In order to produce bulky mixed color yarns with a high degree of intermingling, it is preferred that the cohesion factor (CF) of the yarn entering the intertwining zone be less than 6.0. Using a feed yarn with a high degree of cohesiveness,
A color mixing effect with clear color tones with less mixing can be obtained. The method of the present invention operates satisfactorily and advantageously when a cylindrical restraint zone of length greater than 3 inches (7.62 cm) is created above the intertwining area. More satisfactory results are obtained when the restraint zone distance is at least 5 inches (12.7 cm), and the threads are more uniform. The well cylindrical restraint distance from the mixing area is at least
When the length is 10 inches (25.4 cm), good operability and thread appearance are obtained. If the bulk yarn is fed directly from the area where the filaments of the feed yarn are tensioned and detangled to facilitate intermingling of the filaments, the yarn is advanced from the area into the area where the filaments of the feed yarn are tensioned and disentangled. It is preferred to draw at a speed 2 to 15%, preferably 5 to 15% lower than the initial speed. Under certain conditions, as the yarn is drawn out of the intertwining zone, transverse vibrations to the treated yarn are restrained circumferentially (i.e., the yarn is withdrawn from the lower cylindrical zone in a similar manner to the upper cylindrical restraint zone). (By creating a cylindrical restraint area in the thread) the handling and appearance of the thread can be improved. This additional constraint can be used, for example, on feed yarns that are already dyed and therefore contain up to about 0.3% by weight yarn finish. Also in accordance with the invention there is a body member for entangling the filaments by means of a fluid jet, a yarn passageway, preferably substantially cylindrical, having an inlet end and an outlet end for the yarn passing through the body member, a yarn passageway intersecting the longitudinal axis of the passageway; at least one fluid conduit leading to the passageway through the body member, a device for supplying a compressible fluid under high pressure to the conduit, and a device for supplying a compressible fluid under high pressure to the passageway; a device for advancing the yarn, a device for withdrawing the entangled yarn from the exit end of the yarn, a yarn guide between the device for advancing the yarn and the yarn inlet, the guide being between the guide and the inlet. In an apparatus for intertwining the filaments of a continuous multifilament yarn defining a straight yarn path coaxial with the passageway, the guide is formed from a tube having a longitudinal bore substantially coaxial with the passageway. substantially consisting of a straight path between a device for advancing the yarn and the yarn entry end, the diameter of the hole being substantially smaller than the diameter of the passageway; Large enough to allow free passage, while at the same time circumferentially restraining lateral vibrations of the yarn filament and lateral yarn movement within the hole, the hole is close to the inlet end of the passageway but far away. An improved device is provided having an outlet end at a point where the length is a substantial length of at least 3 inches (7.62 cm). In the above method, the holes are preferably at least 5 inches (12.7 cm) long, more preferably at least 10 inches (25.4 cm) long. Typically the ratio of the diameter of the passageway to the diameter of the hole is at least about
1.3:1.0, and more preferably no greater than about 4.0:1.0. The apparatus of the present invention has an upper cylinder whose outlet is approximately 0.125 to 0.50 inches (0.32 inches) from the entrance of the passageway.
It is particularly effective when separated within a range of ~1.27 cm). For bulk yarns of typical carpet deniers, ie, 1000 to 15000 denier, the effective diameter of the holes for the cylinder is in the range of about 0.06 to 0.25 inches (1.52 to 6.35 cm). The device of the invention may include a guide tube of comparable dimensions and relative spacing, the tube being disposed coaxially with the thread path between the outlet end of the passageway and the withdrawal device. ing. Applying water to the threads before entanglement improves the operability and mixing effect of the process. Water application devices are well known in the art for such purposes. Water is about 5% of the weight of the thread.
It should be given at a rate of ~25%, but the amount is not very important. Referring in detail to the accompanying drawings, FIG. 1 shows a method of the present invention in which three bulky multifilament feed yarns are combined into one cohesive, bulky, mixed color dyeable yarn. Equipment is shown. The device comprises a machine front plate 10 on which a thread guide 12 is mounted, followed by a water dosing device 14, a redirecting roll 16, a pair of drive rolls, namely a roll 18 and an associated inclined roll 20. A thread advancement device is present. Next, an upper cylindrical guide 30 and an optional lower cylindrical guide 36 (the holes of which are not shown) are attached to the brackets 32 and 3, respectively.
8, it is mounted coaxially with the cylindrical thread passage 33 in the jet body member 34. Body member 34 is shown in cross-section to show passageways 33 intersecting perpendicularly with small fluid conduits 35. Fluid conduit 35 is supplied with pressurized compressible fluid from a fluid source (not shown). The space between the cylindrical guides 30 and 36 determines the length of the intertwined area created by the action of the fluid jet device. The device for drawing the entangled threads from the mixing area consists of a take-off idler roll 40. Following roll 40 is a corner roll (not shown) or other suitable roll and winding device. Roll 40 is connected to tubes 30, 36 and passage 33 by bracket 42.
The yarn is held so as to create a straight yarn path from roll 18 to roll 40, which is coaxial with the roll. As shown in FIG.
54 is drawn by rolls 18, 20 from separate packages held on a spool rack (not shown), and includes guide 12, water applicator 14, roll 1
tube 3 in a consolidated continuous state.
0 through the upper end of the jet body member 34 and the cylindrical guide 36. The yarn is attached and mixed by a roll 40 to form a cohesive bulky yarn 5 that can be dyed with mixed colors.
It is drawn out as 8. The apparatus in Figure 2 is similar to that in Figure 1, but
The optional lower cylindrical guide 36 has been omitted, a driven tension roll 24 and associated tilting roll 22 have been added, and parallel snapping pins 28 have been mounted on the platform 26 to prevent mixing before mixing. The difference is that the filament of the feeding yarn is untangled. The cylindrical guide clearly stabilizes the yarn and thus allows the jet to be entangled more efficiently in the entangling area. Also, the formation of single filament loops that occur when "misplaced" filaments are fixed in place by the entangling action is also minimized. If necessary, the entrance to the thread passage may be modified, e.g.
No. 4059873 [Nelson] by using an eccentric thread guide as shown in Figure 2, or by drilling a small diameter hole in a metal plate positioned towards the entrance to the thread passage. Slight restraint can be achieved by using concentric restraints. However, such constraints tend to reduce the efficiency of the intertwining areas and result in less entanglement in the knotted areas. If the degree of entanglement is greater than appropriate, such restraints may be applied to give the yarn a slight jet advancement effect as it exits the entanglement area, or a uniform,
It is possible to give a structure with fewer knots. The feed yarn used in the present invention is a compacted or bulked yarn. The bulked feed yarn is preferably bulked by a hot fluid jet bulking method of the type described, for example, in U.S. Pat. No. 3,781,949 (Breen et al.). Such threads have good bulk and usually have some degree of cohesiveness due to filament entanglement. However, this entanglement is usually only between some of the filaments at a given point along the thread, and rarely for all the filaments at a given location. Therefore, when two or more of these yarns are joined by the method of the invention without first being detangled, the bundle of filaments opens only to a certain extent, and the filaments of different yarns intermingle only to a certain extent. However, when the resulting yarn is then cross-dyed, the yarn is mostly a sharp mixture of individual yarns, with little blending of colors. Removing this cohesiveness by tensioning and snapping the feed yarns before intertwining them allows the filaments of the yarn to be opened and intermingling occurs freely, often resulting in multiple areas of blended colors. As used herein, the term "bulkened yarn" refers to a yarn consisting of permanently crimped filaments. That is, the filament retains its crimp when removed from the thread. The term "mixed color" refers to yarns that are dyed in different colors or tones when cross-dyed in a common dyebath. This term also includes threads of different colors. This is because even when dyed with ordinary dyes, such threads are ``dyed'' in different colors, that is, they have different colors. The cohesion factor (CF) for the intermingling of the filaments of the yarn used in the present invention is determined by clamping a sample of yarn in a vertical position under tension with a weight of 0.20 times the yarn denier but no heavier than 100 g. determined by the method. A weighted hook with a total weight in grams equal to the average denier per filament of the yarn, but not heavier than 10 g, is inserted into the bundle of yarn, and the hook is pressed until the weight of the hook is supported by the yarn.
Decrease at a rate of ~2 cm/sec. Results are expressed as "cohesiveness factor". This is defined in cm as the distance traveled as described above divided by 100. Since the filament entanglement is irregular, a sufficient number of samples are tested to define a representative average value for the yarn under test. For high denier yarns where intermingling is significant, such as carpet yarns made in accordance with the present invention, a transverse pull test provides an accurate measure of yarn cohesiveness factor. For this known test, two hooks are placed at randomly selected points approximately in the center of the bundle of sample yarns, and the filaments are divided into two groups. The hook measures its resistance to separation using a tensile tester, e.g. Instron.
The tester pulls the yarn at a rate of 5 inches/minute (12.7 cm/minute) at a 90° angle to the axis of the yarn. The hooks pull the thread apart until a force of 1 pound (454 g) is applied, at which point the machine is stopped and the distance between the two hooks is measured and recorded. Ten measurements are taken for each yarn, from which an average value of the pull-off values is obtained. Test sample yarns must be at least 4 to 6 inches (10 to 15 cm) in length and randomly selected from the entire yarn to be tested. Example 1 This example describes a commercially available bulked continuous filament nylon yarn for industrial use as a directly tufted carpet yarn, which already has a moderate degree of filament intermixing (yarn cohesion). The use of threads illustrates the importance of cylindrical guidance in the apparatus and method of the invention. Such threads typically have a cohesion factor of about 25 to about 50. The apparatus and method correspond to those described in FIG. The body member of the jet device has a thread passageway 1000 ± 0.001 inches (2540 cm) long that intersects perpendicularly at its midpoint with a cylindrical fluid conduit 0.125 ± 0.001 inches (0.32 cm) in diameter. . Conduit centerline is 0.001 inch (0.00254 cm) of aisle centerline
It intersects within The thread entrance edges and passageway exit ends are rounded and smoothed to a radius of 0.03 inches (0.76 mm). Jet device is 1500 inches (3.81 cm) wide and long.
1000 inches (2.540cm), depth 1.125 inches (2.86
cm) made from a block of type 416 stainless steel. The passage passes vertically through the block from top to bottom and has a center between each of its ends. Its centerline is located 0.500 inches (1.27 cm) from the front of the block, and the conduit enters from the rear of the block. The body member is adapted to be bolted to a manifold for supplying pressurized air to the conductor. The conduit is supplied with air at 150 psig (10.5 Kg/cm ² ), and the air flows through the conduit at 36 scm (1.02 kg/cm 2 ) at ambient temperature.
m ² /min). The forward rolls 18 and 20 move the yarn at 1000ypm (914m/
m) is operated to supply. The yarn is wrapped around the roll at least eight times to ensure a reasonable feed rate. 1.0 by water feeding device
Water is produced in the thread at a rate of gallons per hour (3.79 per hour). The speed of the take-off corner rolls is adjusted to obtain a 3% yarn overfeed from the advance roll. A commercially available seamless stainless steel tube with a hole 0.084 in. (2.13 mm) in diameter and 11.0 in. (27.9 cm) in length was subjected to lateral vibrations that circumferentially restrained the threads at the top of the jet. and coaxially with the yarn path, with a 1/4 inch (0.64 cm) clearance between its exit end and the entrance to the yarn path. The inlet end of the tube is approximately 5.5 inches (13.67 cm) from where the feed yarn leaves the surface of the advance roll in its path toward the jet device.
It is located at. Using this apparatus, an experiment was conducted using three supply threads as follows. (A) The denier of each supplied yarn is 1225 denier. These yarns are commercially available (DuPont) nylon bulked continuous filament yarns made by the hot fluid jet screen bulking process. Yarns have different dyeability, one of which is cationic dyeability (854
type), and the other one is light colored acid stainable (type 855)
The other type is deep color acid staining (type 857). The yarn contains the manufacturer's spin finish on average 0.7% of the standard value for the yarn, and the end of the package contains 0.4 to 1.35% of the yarn. The three original yarns are combined into a single cohesive yarn under the conditions described above. Visual inspection of the cross-dyed skeins shows that they have an interlaced structure with periodic nodes and a significant amount of filament entanglement (even though entanglements are already present in the feed yarns). regardless). The pull-off value of this thread is approximately 1.25 inches (3.18 cm). Other yarns were made from the same three supply yarns under the same conditions, but one guide tube with the same dimensions as above was arranged coaxially at the bottom of the yarn passage of the jet, and the exit of the passage and the outlet to the lower guide tube were arranged coaxially at the bottom of the yarn passage of the jet. The clearance between the two is 1/4 inch (0.64cm). Visual inspection of the resulting cross-dyed skeins and pull-apart cohesion values indicate that the threads are virtually the same as those installed without under-tubing. There is. (B) Interval dyed using the same process conditions as (A).
1820T-497 bulky continuous filament nylon yarn 3
Intertwine the books into a single cohesive thread. The yarn is irregularly spaced dyed, giving the wound feed yarn package a mottled beige/brown appearance. Because it was dyed, the manufacturer's spin finish on the yarn was reduced to approximately 0.25% by weight. As mentioned above, the yarn made with upper and lower tubular guides exhibits a regular periodic interlace structure along the yarn, and the pull-off value is
It is 1.6 inches (4.06 cm). If the same method is used, except that the yarn is not watered, a yarn is obtained with so little entanglement that no meaningful pull-off test can be performed. A third test was conducted without water and using only the good tubular guide.
The resulting yarn had less of the desirable knotty interlace structure that was irregularly spaced along the yarn, and had an average pull-off value of 2.3 inches (5.84 cm). It can be seen that for entangling feed yarns with a low yarn finish concentration, such as 0.3%, best results are obtained by applying water and using tubular guides at the top and bottom of the jet device. Example 2 This example uses the same feed yarn and conditions as Example 1A, but with medium cohesion of the feed yarn (CF=25~
50) was first removed from each thread, and the cohesive factor was reduced to 6
It shows the effectiveness of tubular guides when made smaller.
To do this, the apparatus of FIG. 2 is used to untangle the filaments under tension with a series of parallel snapping pins. Approximately 0.25 inches in diameter (6,
Four steel snapping pins (35 mm) were used. The pins are spaced approximately 0.5 inches (1.27 cm) apart on center. The speed of tension rolls 24, 22 is adjusted such that the tension on the yarn between the tension roll and advance roll is approximately 1.2 gpd. Using such less cohesive feed threads, the overfeed rate between the advancing roll and the take-off roll can be increased to 10%. The cross-dyed skein of the yarn made in this manner exhibits an interlaced structure with desirable regular periodic knots separated by sections of highly compounded filament. The pull test value is 0.9 inches (2.29 cm). The process was repeated under the same conditions but without applying water to the thread from the water applicator. The product was highly blended, highly entangled yarn with a pull-off value of 1.0 inches (2.54 cm), but with fewer periodic highly entangled areas than before. Therefore, under these conditions there is no need to add water to obtain a good product. This method (using water) was repeated, but the feed yarn speed was increased to 2000 ypm (1.828 mpm) and the overfeed was 12%. Cross-dyed skeins of yarn made in this way have a significantly different interlocking structure than products made at lower speeds. Instead of an interlaced structure with periodic knots of low speed threads, it has the characteristics of irregularly disposed bundles of filaments of uniform density along the thread. The degree of incorporation of the filaments is very good considering the high yarn speed and relatively low air velocity in the jet (36 scm, 1.02 m ³ /min). These tests have shown that commercially available bulk continuous filament feed yarns containing conventional amounts of spin finish (i.e., at least about 0.75%) require only a good guide tube for effective operation. Diameter 0.060 inch (1.52mm), 0.120 inch (3.05
A series of tests were conducted with similar results using 6 inch (15.24 cm) and 11 inch (27.94 cm) length guide tubes. Almost no difference was found in the color combination and degree of intertwining throughout. The clearance between the guide tube and the inlet for the thread passage is 1/1 in each tube.
It was kept at 4 inches (6.35mm). Other conditions were essentially the same. Example 3 This example essentially repeated the first experiment of Example 2 with the following conditions. The feed yarn is the same and the apparatus is again that of FIG. The forward roll speed is 1119ypm (1023mpm). Disentangle the feed yarn and apply a tension of 1.14 gpd to bring the flocculation factor below 6.0. A single guide tube with a length of 11 inches (27.94 cm) and a bore diameter of 0.152 inches (3.86 mm) was used in the jet. Its lower end is 1/4 inch (6.35 mm) from the thread passage entrance.
It is located at. The jet is of the same design as Example 2, but the fluid conduit diameter is 0.156 inches (3.96 mm).
It is. The fluid conduit is supplied with air at a pressure of 75 psig and a temperature of 25° C. at a rate of 23 scm (0.64 m ³ /min). Water applicator with 3 grooves at 1.0 gallons/hour (3.79
/hour). Corner rolls provide take-off speed of 1007 ypm (920 mpm) and overfeed of 11%. Cohesive thread products are wound into a package with a winding tension of 225g. These conditions result in a product throughput of 56 lb/position/hour (25.4
Kg). Despite the lower air pressure used in this method compared to Example 2, knitted textile fabrics made from this yarn and dyed were produced under similar conditions but not as described in U.S. Pat.
It is highly compounded compared to control yarns made using the method and apparatus of No. 4,059,873 at much higher air pressures and flow rates. Example 4 This example shows the effect of the guide tube on the operability and yarn appearance under the operating conditions of Example 3. The same experiment was performed, but with a length of 1 inch (2.54
cm), 3 inch (7.62 cm), 5 inch (12.7 cm) and 11 inch (27.94 cm) tubing, and 1/4 inch length
Tests were conducted using an inch (0.64 cm) thread guide and with no guide at all between the advance roll and the thread path. An 11-inch (27.94 cm) tube is best for maneuverability.
A thread inserted into a short tube exhibits an unstable vibration effect, but
This is especially true for 3 inch (7.62 cm) and 5 inch (12.7 cm) tubes. The cross-dyed skeins of these yarns were evaluated for appearance. It can be seen that a tube of at least 3 inches (7.62 cm) in length is required to produce a uniform, well-entangled thread. When shorter tubes and no tubes are used, threads with less entanglement and less uniform knot distribution are produced. Based on maneuverability and thread appearance, it is concluded that a suitable tube length is at least 5 inches (12.7 cm). Example 5 This example demonstrates the use of the method of the present invention to make very high denier carpet yarns. The apparatus is shown in FIG. 2, and a snapping pin was used to untangle the feed yarn to reduce the cohesiveness factor to less than 6.0. Bulky continuous filament made from three types of commercially available high temperature fluid jets66
- The nylon threads were doubled into a single thread using two threads of each type (six in total). The types are cation dyeable 1225 denier (type 494) medium gloss yarn, 1225 denier light color acid dyeable medium gloss yarn (type 495), and
2470 denier deep color acid dyeable (type 497A) yarn with medium luster. The structure of the jet body is the same as that of the above embodiment, but the diameter of the passage is
The air conduit was 0.213 inches (0.54 cm) in diameter. 100 psig (7
Kg/cm ² ) of air is supplied at 40scm (1.12m ³ /min). The forward speed is 455ypm (416mpm) and the water
Delivered at a flow rate of 20 gallons/hour (7.57/hour).
The simple guide tube is 11 inches (27.94 cm) long.
and the hole diameter is 0.152 inches (0.39 cm). Its exit is 1/4 inch (0.64
cm). Yarn withdrawal speed is controlled by corner rolls at 412ypm (377mpm), with overfeed rate of 10%. The resulting yarn has a total denier of 1040, has an interlaced structure with periodic knots, and has a significant amount of filament entanglement between the component yarns. Carpets cross-dyed with this yarn had the appearance of mixed colors without directionality, with deep-colored component yarns predominating. EXAMPLE 6 This example is an example of using the present invention to double a tight (non-bulky) yarn to create a thick denier, tightly cohesive yarn. The feed yarns were three drawn 1000 denier, zero twist, flat 66-nylon yarns with 68 filaments, which were not interlaced and had substantially no filament entanglement. The yarn contains 0.8% of regular yarn finish. The equipment is the same as Example 3, but the tension rolls and snapping pins are not used. This is because the feed yarn is already substantially free of filament entanglement. The compressible fluid is air at 100 psig (7 Kg/cm ² ) and the flow rate is 30 scm (0.84 m ³ /min). 200
Using a winding tension of g, the denier of the yarn obtained is approximately
It was 3100. Experiments were conducted using two different overfeeds, with and without a single tube guide before the entanglement section. Other process conditions are the same as in Example 3. The results obtained are as follows.

[Table] It is clear from these results that the tubular guide improves the effect of filament entanglement in the entanglement zone.

[Brief explanation of the drawing]

FIG. 1 is a schematic elevational view of the device of the invention having cylindrical thread guides arranged coaxially above and below the entangling arrangement of filaments with a fluid jet. FIG. 2 is a schematic elevational view of a device according to the invention having a cylindrical thread guide only at the top of the jet device, which is preceded by a tension zone and a snap ring for removing entanglements of filaments from the feed thread;・The pin is attached.

Claims (1)

Claims: 1. Steps: (a) providing a filament entanglement zone with a fluid jet having a yarn inlet and a yarn outlet, therebetween a closed yarn passage preferably of substantially cylindrical shape; (b) preventing lateral filament vibration above the area; (c) subjecting the at least one yarn to at least one high velocity compression in the path; A method of intertwining at least one multifilament thread, comprising: (i) impinging a fluid jet to vibrate and entangle the filaments; and (d) finally withdrawing the thread from the area. advancing the yarn into the area along a path substantially coaxial with the passage; (ii) preventing lateral filament vibration;
At a point proximate but remote from the entrance of the thread, extending from the beginning of the section and continuing coaxially along the path for a distance of at least 3 inches above the remote point. (iii) the withdrawal of the thread from the area is carried out along a path that is substantially coaxial with the passage; An improved method characterized by: 2. A method as claimed in claim 1, in which the thread is impinged in the passageway with a single jet of compressible fluid in a direction perpendicular to the longitudinal axis of the passageway. 3. The method of claim 2, wherein a number of threads are advanced through the passageway. 4. The method according to claim 3, wherein at least two of the plurality of threads have different dyeing properties. 5. The method of claim 3, wherein at least one of the plurality of threads is space dyed and is a bulky thread. 6. The method of claim 3 or claim 4, wherein the cylindrical restraint zone continues from the point for at least 5 inches. 7. The method of claim 3 or 4, wherein the cylindrical restraint zone continues from the point for at least 10 inches. 8. The method of claim 4, wherein said differently dyed threads have a cohesion factor of less than 6.0 as they are advanced into said channel. 9. The method of claim 1, 2, 3 or 4, wherein the thread is advanced into the passageway at a speed of at least 1500 ypm. 10. A method according to claim 2, 3, 4.7 or 8, wherein the cohesive thread is drawn from the zone at a rate of 2 to 15% slower than the rate at which it was advanced into the zone. 11 Patent for peripherally restraining lateral vibrations of filaments of entangled threads downstream from the outlet of said passageway by a cylindrical restraint zone extending a substantial distance from a point proximate to said outlet downstream thereof. A method according to claim 2, 3 or 4. 12. The method of claim 11, wherein the entangled yarn is withdrawn from the zone at a rate of 2 to 15% slower than the rate at which it was advanced into the zone. 13. The method according to claim 3, 4 or 8, wherein at least one of the threads is bulky. 14 a body member for entangling the filaments with a fluid jet, a yarn passageway, preferably substantially cylindrical, having an inlet end and an outlet end for the yarn through the body member, having an axis intersecting the longitudinal axis of the passageway; at least one fluid conduit leading to the passageway through the body member, a device for supplying compressible fluid under high pressure to the conduit, and a device for advancing the thread at a controlled rate to the entrance of the passageway. , a device for drawing the entangled yarn from the exit end of the yarn, a yarn guide between a device for advancing the yarn and the yarn inlet, the guide being coaxial with the passageway between the guide and the inlet. an apparatus for intertwining filaments of a continuous multifilament yarn defining a straight yarn path, said guide consisting essentially of a tube having a longitudinal bore substantially coaxial with said path; located along a straight path between the thread advancing device and the thread entry end, the diameter of the hole being substantially smaller than the diameter of the passageway, but sufficient to allow the thread to pass freely through the hole. large enough to at the same time circumferentially constrain lateral vibrations of the yarn filament and lateral yarn motion within the hole, the hole being close to the entrance end of the passageway but with an exit point at a remote point. an improved device having a length of at least 3 inches long enough to substantially prevent jet-induced lateral vibration of the filament above the exit end of the hole; . 15. The apparatus of claim 14 having a single fluid conduit perpendicularly intersecting said passageway and having a cross-sectional area substantially smaller than said passageway. 16. The device of claim 15, wherein the hole is at least 5 inches long. 17. The device of claim 15, wherein the hole is at least 10 inches long. 18 The ratio of the diameter of the passageway to the diameter of the hole is at least about
18. The device according to claim 17, wherein the ratio is 1.3:1.0. 19 The outlet end of the hole is about
Claim 1 separated by 0.125 to 0.5 inches
The device according to item 8. 20. The apparatus of claim 18, wherein the diameter of the holes ranges from about 0.060 to 0.250 inches. 21. The device for advancing the thread has a speed of at least 1500 ypm.
15. The apparatus of claim 14, wherein the apparatus is operated at a forward speed of . 22. Claim 1, wherein the device for drawing out the yarn is operated at a speed of 2 to 15% slower than the device for advancing the yarn.
5, 16 or 17. 23. The device of claim 15, wherein the device for advancing the yarn, the hole, the passageway, and the device for withdrawing the yarn define a continuous, straight yarn path between the advancement and withdrawal devices. 24 having a second tube for guiding the yarn located along the yarn path between the outlet end of the passageway and the yarn withdrawal device, the second tube being connected to the passageway and the yarn path; having a coaxial hole having a diameter smaller than the diameter of the passageway but large enough to freely pass a bulky intertwined thread therein; and peripherally restraining the movement of the filament and having a yarn entry end located near the exit of the passageway.
Apparatus described in section. 25 The device for drawing out the thread is 2 times faster than the speed of the advancing device.
Claim 2 operated at ~15% slower speed
The device according to item 4.