CA1147940A - Bounce crimp texturizing process and apparatus - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

An accumulatorless process is disclosed for bounce crimp texturizing thermoplastic yarn. The process includes the step of supplying at least one drawn multi-filament thermoplastic yarn to a bounce crimp texturizer thereby texturizing the yarn. The texturized yarn is collected by winding the yarn on a rotating winder spindle. The relative tension on the texturized yarn is sensed at a position between the bounce crimp texturizer and the winder spindle and the rate of the yarn wind-up is reduced when the sensed tension on the texturized yarn exceeds a predeter-mined tension value and the rate of the yarn wind-up is increased when the sensed tension on the yarn is equal to or less than the predetermined tension value. The pre-determined tension value is selected at a value to ensure that the freshly texturized yarn is discharged from the texturizer in an essentially tensionless state without intermediate texturized yarn accumulation.

Description

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002 BOllNCE CRIMP TEXTURIZING PROCESS AND APPARATUS

004 BACKS~ROUND OF THE INVENTION
005 1. Field of the Invention 006 This invention relates to an improved method and 007 apparatus for bounce crimp texturizing yarn. In a further 008 aspect this invention relates to an accumulatorless bounce 009 crimp process and apparatus wherein relative yarn tension is 010 sensed and yarn tension adjusted to prevent yarn tangling and 011 yarn crimp straightening.
012 2. The Prior Art 013 Synthetic tnermoplastic yarn materials are produced 014 as a nunber of continuous, straight, smooth filaments. Such 015 yarns have little bulk, and their utility in textile applica-016 tions is thus rather limited.
01? In order to enhance the bulk and texture of synthetic 018 yarns, a variety of crimping processes have been used in the 019 pas~:. One- common technique which has been used for thermo-020 plastic yarns is to bend the yarn filaments and heat the yarn 021 while the filaments are in bent or crimped configurations, 022 commonly referred to as false twist texturizing. Another type 023 of texturizing is fluidized texturizing such as, for example, 024 described in ~.S. Patent 2,869,967.
025 An especially good texturizing technique, in terras of 026 yielding a high-bulked yarn, is known as "rebound" or "bounce 027 crimping". Bounce crimping entail~ hurling yarn, propelled by 028 a heated fluid through a jet, in a continuous stream-like flow 029 against a foraminous surface upon which the yarn impinges and 030 from which the yarn instantaneously rebounds or bounces. The û31 impact of the yarn upon the foraminous surfa~e axially buckles 032 and crimps individual filaments of the yarn while the heated 033 fluid passes through the foraminous surface. The texturized 034 yarn progresses without tension and substantially by rebound 035 inertia away from the crimping zone and, in the prior art 036 process, is guided to a collection station where the yarn is 037 heated and then cooled to heat-set the crimp prior to winding 038 upon a storage spool.

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,, , ~14~940 002 Thermoplastic yarn texturized by the foregoing bounce 003 crimping process possesses, inter alia, exceptional covering 004 capability and a high degree of resiliency; note U.S. Patent 005 3,686,848.
006 The basic process and apparatus for practicing the 007 bounce crimp texturizing process is described by Clarkson in 008 U.S. Patent 3,665,567. Eriefly, the Clarkson processs entails 009 feeding a yarn through an elongate slender tube by a jet of 010 steam and hurling the yarn longitudinally against a foraminous 011 screen causing it to buckle in a random manner and bounce away 012 in a random array. The yarn is thereby crimped or texturized 013 and freely rebounds laterally through a passage from which it 014 drops down to a receiver for heat-setting. The steam primarily 01~ passes through the foraminous screen and is collected.
016 Although, bounce crimping produces a particularly 017 desirable produçt, the process has certain sensitivities. Thus-018 in order to properly conduct bounce crimping, it is Lmportant 019 that the yarn is rebounded from the screen and discharged from 020 the bounce crimper under essentially no tension. The yarn 021 cannot be pulled from the bounce crimper, since tension on the 022 yarn at this point could pull the crimp from the yarn and could 023 also cause the foraminous screen to be bypassed.
024 Various improvements in bounce crimp texturizing 025 processes and apparatus are described in U.S. Patents 026 3,859,696, 3,859,S97 and 3,887,971. All of the apparatus and 027 processes described in these patents and in U.S. Patent 028 3,665,567 are characterized by the use of a J-tube type yarn 029 accumulator wherein the yarn is accumulated (piled) and heat-030 treated (heat-set and cooled). In U.S. Patent 3,879,819, the 031 J-tube is provided with a photo-cell light sensing means for 032 maintaining a contain height (pile) of yarn in the J-tube by 033 regulating the yarn wind-up speed in response to the sensing 034 means.
035 The J-tube accumulator was used by the prior art to 036 heat-set the crimp on the yarn and to ensure that the yarn 037 rebounded from the bounce crimp screen in a tensionless state ~47940 by permitting the yarn to free fall into the J-tube accumu-lator. Subsequently, the J-tube was primarily used only for the second purpose. However, in accumulating or piling the yarn, tangles were fo~md to occur, resulting in localized pulling on the yarn as it was wound up, thus causing the crimp to be pulled out of random segments of the yarn and/or the yarn to break. The frequency of these breaks necessitated an increase in the number of operators required to operate or monitor a given number of texturizing machines and re-thread the yarn when breaks occur.
Also, where low-denier yarns ~e.g., about 500 denier or less) are used, the problem is magnified such that accumu-lator systems cannot be efficiently used. This magnification is believed caused by the fact that the lower the denier, the more loops or coils that are in contact with each other in the accumulator. Hence, the more contact the more chance there is for filaments of the various loops to tangle with each other. This increased contact, coupled with the lower weight of the loops or coils, substantially increases the likelihood of the loops being pulled out of the accumulator, resulting in increased piling and tangles, etc.
SUMMARY OF THE INVENTION
The present invention provides a felicitous method and apparatus for bounce crimp texturizing yarn wherein the yarn issuing from the bounce crimper is collected without tensioning the yarn in the critical area (i.e., the freshly ~L7~40 001 -4~

002 texturized yarn is discharged from the bounce crimper in an 003 essentially tensionless state) and which eliminates inter-004 mediate yarn accumulation (piling). By eliminating inter-005 mediate yarn accumulation the present invention eliminates the 006 tangling problems associated with such yarn accumulation and 007 very substantially reduces yarn breaks and localized segments 008 of straightened yarn and facilitates the use of high yarn 009 speeds (e.g., 5200 feet per minute).
010 In one embodiment the invention comprises an 011 accumulatorless process for bounce crimp texturizing yarn which 012 comprises supplying a yarn to a bounce crimper wherein said 013 yarn is bounce crimp texturized, winding said yarn on a 014 rotating winder spindle, preferably laterally offset from said 015 bounce crimper; sensing the tension on said texturized yarn at 016 a po~ition between said. bounce crimper and said wind-up means 017 and.decreasing the wind-up speed of said texturized.yarn when, 018 and: during the time, said. tension exceeds a predetermined 019 value; and increasing the wind-up speed of said yarn when, and 020 during the time, the sensed tension is equal to or less than 021 said predetermined value.
022 Another embodiment of the in~ention comprises a 023 bounce crimp texturizing apparatu comprising a bounce crimp 024 texturizer; means for supplying yarn to said texturizer, wind-025 up~means for collecting the texturi3ed yarn; tension sensing - 026 mean for sensing the relative tension on said yarn at a 027 lo~ation between said bounce crimp texturizer and said wind-up 028 means; controller means operatively connected to said tension 029 sensing means and a means for adjusting the rate of yarn 030 take-up,. for controlling the rate of yarn take-up in response 031 to said sensed tension whereby the rate of yarn wind-up is 032 decreased when, and so long as, the yarn tension sensed by said 033 tension sensing means exceeds a predetermined value and 034 increased when, and so long as, the tension sensed by said 035 slack sensing means is equal to or less than said predetermined 03~ value.
037 A further embodiment of the pro~esses and apparatus , _, . . _ ! . _ . .
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~79~0 002 comprises the adapta~ion of the aforedescribed processes and 003 apparatus to the production of conjugate and novelty yarns.
004 This is accomplished by feeding two or more yarns to the bounce 00S crimp texturizer.
006 In one preferred embodiment of the above processes 007 and apparatus, relative tension is sensed by sensing the 008 relative tightness of the yarn and in another preferred embodi-009 ment by sensing the relative slack of the yarn.
010 BRIEF DESCRIP$ION OF THE DRAWING
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011 The drawings represent preferred non-limiting embodi-012 ments of the process and apparatus of the invention, wherein 013 like reference numerals refer to like parts, wherein:
014 FIG. l is a schematic elevation reprssenting a yarn 015 processing system and apparatus according to the invention;
0l6 FIG. 2 is a section view of FIG. l along line 2-2;
011- FIG. 2A i5 a section view corresponding to FIG. 2 but 018 wherein the photosensing means have been repositioned to sense 0l9 yarn slack.~
020 FIG. 3 is a schematic elevation representing an 021 adaptation of the yarn processing system and apparatus shown in 022 FIG. l to the production of conjugate and novelty yarns.
023 F~RT~ER DESCRIPTIO~ OF T~E
024 INVENTION A~D PREFERRED EMBODIMENTS
025 The present invention is applicable--to thermoplastic 026 yarns and deniers which can be bounce cromp texturized. Such 027 thermoplastic- yarns include, for example, nylon yar~s, e.g., 028 nylon 66, nylon 6, polyolefin yarns, e.g., polypropylene, 029 combination yarns such as combinations of nylon and 030 polypropylene; and the like. The drawn yarn fed to the 031 texturizer typically has ~ denier in the range of about from 032 l00 to 5000.
033 Referring now to FIG. l of the drawings, a preferred 034 non~limiting embodiment of the invention will be described.
035 The overall yarn processing apparatus typically 036 comprises a panel board or frame 20 upon which the various 037 operative components of the apparatus, described hereinbelow, 79~0 002 are mounted. Undrawn thermoplastic yarn 1 (e.g., polypro-003 pylene, nylon 66, etc.) is fed from a supply package of yarn, 004 not shown, to a first driven godet roller 3 with skewed 005 separator roll 2 and then to a second driven godet roller 5 006 with skewed separator roll 4. Godet rolls 3 and 5 can be and 007 typically are heated. Rolls 4 and 5 advance the yarns at a 008 much greater speed than the rolls 2 and 3, thereby drawing the 009 yarn. For example, ~sing nylon 66, rolls 4 and 5 are typically 010 operated at a peripheral speed in the range of about from 3 to 011 3.6 times that of rolls 2 and 3, thereby effecting about a 3 to 012 3.6 draw in the nylon 66 yarn. Using nylon 66, godet rolls 3 013 and 5 are typically operated at temperatures in the range of 014 about from 275F to 325F. Using polypropylene, rolls 4 and 5 015 are typically operated at peripheral speeds in the range of 016 about 2.7 to 3.1 times that of rolls 2 and 3, thereby effecting 017 about a 2.7 to 3.1 draw~ in the polypropylene yarn, and godet 018 rolls 3 and 5 are typically operated at temperatures in the 019 range of about from 222F to 275F.
020 Yarn 1 is fed from the draw rolls via roll 4 to 021 bounce crimp texturizer 6, typically at speeds in the range of 022 about 3000 to 5000 fpm.
023 A fluid such as steam or heated air is fed to the 024 bounce crimper 6 through line 7. In the bounce crimper, a jet 025 o fluid causes the yarn to be hurled against a screen (not 026 shown) in the interior of the texturizing jet. From thare, the 027 yarns rebounds out through outlet tube 8 in a substantially 028 tensionless state. Yarn 1 leaves bounce crimper outlet tube 8 029 at a speed about 5 to 15% less than the feed speed due to the 030 shortening of the yarn caused by crimping and loop-to-loop 031 compaction, and is ultimately collected on yarn package 16 at 032 over-all average speeds of about 5-10% less than the feed speed 033 due to the retained crimping (but substantial removal of the 034 loop-to-loop compaction).
035 The present invention does not alter the operation of 036 the bounce crimper and thus the bounce crimper can be operated 037 in the usual manner. Suitable bounce crimp texturizers and 7g~0 their method of operation are, for exampleJ described in U.S. Patents 3,859,696; 3,859,697; 3,879,819 and 3,887,971.
Yarn 1 leaves outlet tube 8 in a loosely compacted state, and at this point has a diameter generally approaching or approximat-ing the internal diameter of the outlet tube 8.
Yarn l then falls into J-tube 9 wh;ch~ guides the yarn past the sensing device 10. No yarn accumulation occurs in the J-tube and its use merely represents an adaptation of existing conventional equipment. Other guide means could also be used in place of or in addition to the J-tube (e.g., idler rollers and/or guide plates).
Also, the J-tube can be provided with idler rolls to minimize yarn contact with the walls of the J-tube.
Yarn l leaves the J-tube and passes over idler roll 11 then through electromag~ttic disc tensîoner 12 and then over idler roll 13 and compensator ar~ roller 14a and is wound to wind up on package 16 driven by driving roller 15.
Referring to FIG. 2 the tension sensing means will now be described. The tension sensing means is shown as a combined light source and light receiving means 10a and a slightly tilted reflecting surface 10b positioned within J-tube 9 in generally diametrically opposed relationship on opposite sides and generally above the base path of yarn 1 (shown somewhat enlarged to facilitate illustration).
(The term "base path" generally refers to the path that the yarn would normally take when taken-up at speeds about 5-15% less than the speed at which the yarn (or core yarns in the case of novelty yarns) in fed to the bounce crimper). As the tension on yarn 1 increases, the yarn is tightened and path of yarn 1 rises, eventually preventing light from being received by the light receiving (sensing~ meansO ~hen light is not received by ~he light sensing means 10a, the light sensing means activates controller 17 (FIG. 1~ which decreases the rate or speed of yarn take-up of yarn 1 on package 16; for example, by directly reducing the speed of driving roller 15 or by activating electromagnetic ~7~40 disc tensioner 12. This in turn reduces the tightness of yarn 1 and lowers the path of yarn 1 until it no longer prevents the receipt of light by light sensing means lOa. When light is received by light sens-ing means lOa, it in turn activates controller 17 to increase the wind-up speed thereby increasing tension, thus increas;ng yarn tightness and again raising the path of yarn until it prevents the receipt of light by light sensing means lOa, thus repeating the cycle. Accordinglys the steady state is seldom reached and generally there is a more or less constant cycling (increases and decreases~ of the yarn take-up speed.
Referring again to FIG. 1, two means of controlling the rate of yarn take-up are shown; though typically, and preferably, in actual practice only one method of take-up control will be used. In the first method controller 17 directly controls the speed of driving roll 15, for example, by utilizing a conventional D.C. motor and-a speed control relay. The driving roll motor oscillates between a high and low speed setting in accordance with the command given by controller 17. In actual practice it seldom, if ever, reaches the high or low speed setting because the command is rapidly changed as the photocell is blocked and unblocked. The present speed settings will vary with the particular yarn material and denier but typically high wind-up speed setting of about from 2000 to 5000 fpm and slow speed setting of about from 1400 to 4500 fpm can be used. The variation in speed selected between the high setting and low setting will be a function of the particular system and the rapidity of response desired.
In the second control system illustrated in FIG. 1, yarn take-up speed can also be controlled by an electromagnetic disc tensioner and compensator arm system. (The compensator arm system is a conventional method of changing yarn take-up speed.) In the present system, when the yarn 1 blocks light from light receiving means lOa, it activates controller 17 which in turn activates electromagnetic disc tensioner 12 which causes disc 12a to be lightly pressed against yarn 1, thereby ~47940 001 -'9-002 increasing the tension on yarn 1 between the tensioner 12 and 003 package 16. This causes compensator arm 14 to rotate about 004 pivot point 14b in a clockwise direction causing the rate of 005 yarn take-up to increase and ultimately lowering the path of 006 yarn 1 so that light is no longer blocked from the light 007 sensing means. The light sensing means then deactivates 008 controller 17 which in turn deactivates electromagnetic disc 009 tensioner 12. Thus, decreasing the yarn tension acting on the 010 compensator arm. Spring 14c then causes the compensator arm to 011 rotate in a counterclockwide direction, which cau es the rate 012 of yarn takeup to decrease until yarn 1 again blocks light from 013 light source means lOa, thus repeatiny the cycle. Where it is 014 desired to rely on the motor speed control discussed above, 015 tensioner 12 can be deactivated and the position of compensator 016 arm 14 ~ixed so that it will not vary with yarn speed and OI7 interfere with proper operation of the control system.
018 Referring to FIG. 2A, an embodiment of the invention 019 is illustrated wherein the light source and sensing means are 020 positioned below th~ general path of yarn 1 (again shown 021 enlarged to facilitate illustration), so in this instance, 022 light is blocked from the light sensing means when yarn 023 tension, as measured by slack, decreases to a predetermined 024 value. Also in FIG. 2A a separate light source means and light 025 receiver means have been used in place of the combined light 026 source and receiving means and reflecting surface used in FIG.
027 2, for purposes of illustration. In this figure, light source 028 means lOc and light receiving means lOd are positioned 029 generally diametrically opposed on opposite sides of the slack 030 path of yarn 1 and below the selected base path of yarn 1. As 031 slack on yarn 1 increases ~or yarn tightness is decreased), its 032 path through J-tube 9 is lowered until eventually yarn 1 blocks 033 the receipt of light by light receiving means lOd. When this 034 occurs controller 17 (FIG. 1) is activated causing the rate of 035 yarn take-up of yarn 1 to be increased. When light i5 again 036 received by light receiving means lOd, controller 17 (FIG. 1) 037 is activated causing the yarn take-up speed to be reduced. The ; ~

79~0 002 operation of this embodiment is the same as described above 003 with respect to FIGS. 1 and 2 with the exception that here the 304 rate of yarn take-up is increased when light is blocked from 005 the light sensing means and decreased when it is received. And 006 again, as with the embodiment described in FIGS. 1 and 2 in 007 actual operation, there will generally be a more or less 008 constant cycling of the rate of yarn take-up.
009 Also, although reflecting means and a combined light 010 source and receiving means have been used in one instance and a 011 separated light source means and receiving means in the other, 012 it should be appreciated that either light sensing system could 013 be used in either instance or other suitable light sensing or 014 photocell systems could be used as well as other systems for OlS sensing yarn tension. Also, although the optimum vertical 016 position of the light sensing system relative to the lateral 017 base path of the yarn will vary with the process and apparatus 018 details of th~ system, typically the light sensing system is 019 positioned about from 5 to 50 ~m, preferably 10 to 30 mm above 020 or below the base path of the yarn.
021 As is readily apparent, by routine adjustment of the 022 high and low yarn take-up rates and the sensing system, the 023 present inv~ntion ensures that freshly texturized yarn is 024 discharged from the bounce crimper in an essentially tension-025 less state and eliminates yarn piling and tangles.
026 Referring to FIG. 3, an embodiment of the invention 027 is shown for preparing conjugate and novelty yarns.
028 Fluidized jet and especially bounce crimp crimpers 029 are particularly applicable to the formation of conjugate and 030 novelty yarns because they produce a greater initial separation 031 of the respective yarn fibers and subsequent intertwining of 032 the fibers of the respective yarns. Thus by simultaneously 033 passing two or more yarns through the same bounce crimping 034 means, a conjugate yarn is formed wherein the fibers of the 035 respective yarns are intertwined. If one of the yarns is fed r r ~ r~

~L4f~940 002 to the bounce criping unit at a slower rate of speed than the 003 other yarns, the faster fed yarns will loop around the slower 004 fed yarn, thus forming an outer yarn effect. The outer yarns 005 are generally referred to as the "effect yarns", whereas the 006 inner yarn is referred to as the "core yarnn. The relative 007 amount of looping of the effect yarns per unit length of the 008 slower fed yarn (i.e., core yarn) will, of course,-depend upon 009 the relative feed speeds of the core yarn and the effect yarns.
010 Because of the crimping and yarn compaction, 011 occurring in the crimping mean~, the novelty yarn will leave 012 the crimping means at a speed about 5 to 15% slower than the 013 speed at which the core yarn was fed to the crimping means.
014 Typically core yarn feed speeds in the range of about from 200 015 to 400 fpm and effect yarn to core yarn feed rate ratios up to 016 about 100:1, can be used. Also, by varying the relative feed 017 rates of the effec~ yarn, or yarns, to the core yarn, slub yarn 018 effects can be obtained.
019- All of the yarns can also be fed to the crimper at 020 about the same rate of speed in which case the resulting yarn 021 will be an intertwined composite o~ the respective yarns;
022 commonly referred to as a conjugate yarn.
023 Returning now to FIG. 3, the operation of the 024 apparatus shown in this figure is the same as described herein-025 above, with respect to FIGS. 1-3 with the exception that two 026 yarns are fed to the-bounce crimper. Thus, undrawn thermo-027 plastic yarn 1 is fed from a supply package of yarn (not shown) 028 to a first driver godet roller 3 with skewed separator roll 2 029 and then to a second driven godet roller 5 with skewed 030 separator roll 4. Godet rolls 3 and 5 can be and typically are 031 heated. Rolls 4 and 5 advance yarn l at a much greater speed 032 than the rolls 2 and 3, as already explained with respect to 033 ~IG. l, thereby drawing yarn l. Yarn l is then fed to bounce 034 crimper 6.
035 A predrawn multi-filament yarn la is fed from a 036 supply packup (not shown) to a driven godet roll l3 and about a 037 skewed separator roll 18a and roll 19 to bounce crimper 6, ~47~40 002 simultaneously with yarn 1. 8Oth yarns can be fed at the same 003 rate, in which case the texturized yarn product will be a 004 conjugate yarn, or at different rates in which case the slower 005 fed yarn will form the core yarn and the faster fed yarn will 006 form the effect yarn. Where novelty yarns are desired, 007 overfeed effect yarn:core yarn ratios as high as 100:1, or 008 higher can be used but typically will be in the range of about 009 from 3:1 to 50:1.
010 The respective yarns are crimped, intertwined by the 011 action of bounce crimper 6 and issued therefrom as a single com-012 bined yarn lb. The details of the remaining components-shown 013 in FIG. 3 and the operation thereof are the same as described 014 hereinabove with respect to FIGS. 1, 2, and will not be 015 repeated. Also, although, as shown, light sensing me~ns 10 is 016 positioned above the general yarn path, it should be 017 appreciated that the embodiment, described with respect to FIG.
018 2A could also be practiced with respect to this embodiment.
019 Yarns 1 and la can be of the same or different 020 thermoplastic materials and can have like or different deniers.
021 Also, although for ease of illustration only two yarns have 022 been ~hown per texturizing unit it should be appreciated that 023 more than two yarns could be used, for example 3 to 8 yarns, 024 depending on the size of the bounce crimper and the denier of 025 the yarns.
026 Obviously, many modifications and variations of the 027 --- invention, described hereinabove and below in the claims, can C28 be made without departing from the essence and scope thereof.

Claims (14)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. An accumulatorless process for bounce crimp textur-izing thermoplastic yarn which comprises the steps of:
(a) supplying at least one drawn multi-filament thermo-plastic yarn to a bounce crimp texturizer thereby texturizing said yarn;
(b) collecting said texturized yarn by winding said yarn on a rotating winder spindle;
(c) sensing the relative tension on said texturized yarn at a position between said bounce crimp texturizer and said winder spindle and reducing the rate of said yarn wind-up when the sensed tension on said texturized yarn exceeds a predeter-mined tension value and increasing the rate of said yarn wind-up when the sensed tension on said yarn is equal to or less than said predetermined tension value and wherein said pre-determined tension value is selected at a value to ensure that the freshly texturized yarn is discharged from said texturizer in an essentially tensionless state without intermediate texturized yarn accumulation.

2. The process of Claim 1 wherein said winder spindle is laterally offset from said bounce crimp texturizer whereby the path of said texturized yarn from said bounce crimp texturizer to said winder spindle has a lateral component.

3. The process of Claim 2 wherein the relative vertical height of the lateral component of said yarn path raises and lowers as yarn tension increases and decreases and wherein said sensed yarn tension is sensed by sensing said relative vertical height.

4. The process of Claim 3 wherein said vertical yarn height is sensed by projecting, and sensing, a beam of light across, but above the base path of said yarn and wherein said beam of light is projected relative to said yarn such that when said sensed yarn tension exceeds said predetermined value said yarn will prevent said beam of light from being sensed and wherein the rate of yarn wind-up is decreased when said light is not sensed and increased when said light is sensed.

5. The process of Claim 3 wherein said verticle yarn height is sensed by projecting and sensing a beam of light across, but below, the base path of said yarn and wherein said beam of light is projected relative to said yarn, such that when said yarn is at said predetermined relative tension value said yarn will prevent light from being sensed and wherein the rate of yarn take-up is increased when said light is not sensed and decreased when said light is sensed.

6. The process of Claim 4 or 5 wherein at least two drawn yarns are supplied to said bounce crimp texturizer there-by producing a single combined texturized yarn.

7. An accumulatorless yarn processing apparatus for bounce crimp texturizing multi-filament thermoplastic yarn, which comprises in operative relationship:
(a) a bounce crimp texturizing means for texturizing yarn;
(b) at least one yarn supply means for supplying drawn thermoplastic yarn to said bounce crimp texturizing means;
(c) a yarn take-up means comprising a rotating spindle means for collecting said texturized yarn;
(d) tension sensing means for sensing the relative tension on said texturized yarn at a position between said bounce crimp texturizer and said spindle means;
(e) means for adjusting the rate of yarn take-up; and (f) tension activated control means, operatively connected to said tension sensing means and said means for adjusting the rate of yarn take-up, for controlling the rate of yarn wind-up in response to said sensed tension whereby the rate of yarn take-up is decreased when said sensed tension exceeds a predetermined value and increased when said sensed tension is equal to or less than said predetermined tension value.

8. The apparatus of Claim 7 wherein said apparatus com-prises drawing roll means for drawing said yarn prior to supplying said yarn to said bounce crimp texturizing means.

9. The apparatus of Claim 7 wherein said spindle means is laterally offset from said bounce crimp texturizing means whereby the path of said texturized yarn from said bounce crimp texturizing means has a lateral component and whereby the relative vertical height of said lateral component raises and lowers as yarn tension increases and decreases.

10. The apparatus of Claim 9 wherein said tension sensing means. comprises a light source means for protecting a beam of light and light sensing means for sensing said beam of light, operatively positioned with respect to said texturized yarn such that when the tension on said texturized yarn exceeds said predetermined value it will prevent the receipt of light by said light sensing means thereby activating said tension activated control means to decrease the rate of texturized yarn take-up, and wherein when said light is sensed by said light sensing means, it deactivates the control means to increase the rate of yarn take-up.

11. The apparatus of Claim 9 wherein said tension sensing means comprises a light source means for protecting a beam of light and a light sensing means for sensing said light, operatively positioned with respect to said texturized yarn such that when the tension on said texturized yarn is at said predetermined value, it will prevent light from being sensed by said light sensing means thereby activating said tension activated control means to increase the rate of texturized yarn take-up and wherein when light is sensed by said sensing means, it deactivates the said control means to decrease the rate of yarn take-up.

12. The apparatus of Claim 10 or 11 wherein said yarn processing apparatus comprises a tensioning means, in operative relationship with said control means and operatively positioned with respect to said yarn, for applying tension to said texturized yarn at a position between said tension sensing means and said yarn take-up means; and a compensator arm means positioned in operative relationship with said yarn and said take-up means at a location between said yarn tensioning means and said wind-up means for adjusting the rate of yarn take-up whereby when said sensed tension exceeds said predetermined value said control means activates said tension means to apply tension to said yarn thereby causing said compensator arm means to rotate clockwise thereby reducing the rate of yarn take-up and whereby when said sensed tension is less than or equal to said predetermined value said control means deactivates said tensioning means thereby reducing said applied tension causing said compensator arm to rotate counter-clockwise and thereby increasing the rate of said texturized yarn take-up.

13. The apparatus of Claim 10 or 11 wherein said yarn processing apparatus comprises a tensioning means, in operative relationship with said control means and operatively positioned with respect to said yarn, for applying tension to said texturized yarn at a position between said tension sensing means and said yarn take-up means; and a compensator arm means positioned in operative relationship with said yarn and said take-up means at a location between said yarn tensioning means and said wind-up means for adjusting the rate of yarn take-up whereby when said sensed tension exceeds said predetermined value said control means activates said tension means to apply tension to said yarn thereby causing said com-pensator arm means to rotate clockwise thereby reducing the rate of yarn take-up and whereby when said sensed tension is less than or equal to said predetermined value said control means deactivates said tensioning means thereby reducing said applied tension causing said compensator arm to rotate counter-clockwise and thereby increasing the rate of said texturized yarn take-up and wherein said tensioning means is an electro-magnetic disc yarn tensioner.

14. The apparatus of Claim 7, 9 or 10 wherein said apparatus comprises at least two of said yarn supply means for said bounce crimping texturizer whereby at least two yarns are supplied to said bounce crimp texturizer thereby producing a single combined texturized yarn.