US3346207A - Precision cross-winding apparatus - Google Patents

Precision cross-winding apparatus Download PDF

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Publication number
US3346207A
US3346207A US472906A US47290665A US3346207A US 3346207 A US3346207 A US 3346207A US 472906 A US472906 A US 472906A US 47290665 A US47290665 A US 47290665A US 3346207 A US3346207 A US 3346207A
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Prior art keywords
yarn
winding
infinitely variable
yarn package
package
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US472906A
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English (en)
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Jenny Rudolf
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Machinenfabrik Schweiter AG
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Machinenfabrik Schweiter AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/023—Hank to spool winders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • ABSTRACT OF THE DISCLOSURE A precision cross-winding apparatus which incorporates at least one winding station for winding yarn into a package, a yarn delivery device for feeding yarn to the winding station, and an infinitely variable drive including speed adjustment means provided for the aforesaid Winding station to efiect winding of the delivered yarn into said yarn package. Additionally, a further infinitely variable drive including speed adjustment means is operatively connected with the infinitely variable drive for the yarn package and coacts with the yarn delivery device, and means are provided for forceably conjointly actuating in a predetermined relationship said adjustment means of both of the aforesaid infinitely variable drives.
  • the present invention has reference to an improved precision cross-winding apparatus, primarily for processing elastic or stretchable windable material, for instance crimp yarn and elastic yarn, e.g. rubber-like yarns, for cross-winding the same with uniform, controlled yarn tension and eliminating tension fluctuations emanating from the wind-olf body.
  • elastic or stretchable windable material for instance crimp yarn and elastic yarn, e.g. rubber-like yarns
  • the speed of rotation of the spindle of the cross-wound yarn package is reduced with increasing diameter of the yarn package or cheese wound thereon in order to obtain a yarn speed which is as constant as possible.
  • the yarn delivery device for the cross-wound yarn package in the terminal phase delivers too little yarn in comparison with the starting phase. This can lead to the formation of new yarn tension and, thus, to improper cross-wound yarn packages or cheeses possessing poor pay-01f properties.
  • a further condition which negatively influences the winding operation is that, with known constructions the rotational speed variators are directly actuated by an element which tests or scans the diameter of the yarn package, for instance a pressure or support roller. This results in that an increased and non-uniform pressure is exerted upon the aforementioned feeler element and can again lead to improperly wound yarn packages possessing poor payoff characteristics.
  • a further considerable object of this invention is directed to an improved precision cross-winding apparatus which winds yarns or other filamentous materials in such a manner that the Wound yarn is as free as possible of tension fluctuations, possessing a relatively uniform controlled yarn tension.
  • Still a further important object of this invention is to provide an improved construction of precision cross- Winding apparatus for winding up yarns or the like such that they possess good pay-ofi characteristics.
  • Another object of the present invention is directed to an improved precision cross-winder which effectively controls yarn tension at the individual winding stations, even when restarting winding at a station where there already exists a partially wound yarn package.
  • the precision cross-winding apparatus designed according to the teachings of the present invention embodies a yarn delivery device, an infinitely variable bobbin spindle drive, means for testing the diameter of the crosswound yarn package and which cooperates with the bob bin spindle drive in order to influence the speed of r0ta tion of the spindle as a function of the increase of the diameter of the yarn package.
  • Characteristic of the invention is that a further infinitely variable drive which is operatively connected with the yarn delivery device is connected with the drive of the infinitely variable bobbin spindle drive, and that adjusting elements are provided for both infinitely variable drives which are forcibly conjointly capable of actuation in a certain predetermined proportionality or relationship via a drive.
  • the cylinders or drums of the yarn delivery device are continuously positively connected with the wind-up bobbin spindle while providing for a constant proportionality of the peripheral speed of the cross-wound yarn package which is changeable in diameter to that of the aforesaid drums of the yarn delivery device.
  • the constant proportionality or relationship can be relatively changed in accordance with the coefficient of friction, the elasticity or stretchability of the windable material and/ or the desired slip, and the peripheral speed can be maintained constant, or for economic reasons slightly increases during the entire winding operation, and specifically is free of delay and without influencing the quality of the wound yarn packages by the yarn packagediameter feeler and adjusting elements. Consequently, there is ensured for the winding of yarn packages or cheeses possessing uniform tension which is controllable.
  • FIGURE 1 schematically illustrates the general physical structure of a preferred embodiment of inventive precision cross-winding apparatus
  • FIGURE 2 is a perspective view showing details of the drive and control for the winding apparatus depicted in FIGURE 1;
  • FIGURE 3 is a fragmentary, longitudinal sectional view showing a detail of the driving friction wheel or disk of the arrangement of FIGURE 2;
  • FIGURE 3 is a vertical sectional view of the arrangement of FIGURE 2, taken along the lines IVIV thereof;
  • FIGURE 5 schematically illustrates details of the mechanical control elements of the arrangement of FIG- URE 2;
  • FIGURE 6 is a view analogous to FIGURE 5, yet depicting the elements in a position corresponding to a different operating condition;
  • FIGURE 7 is an electrical circuit diagram for the embodiment of winding apparatus depicted in FIGURES 1 to 6;
  • FIGURE 8 is a graph depicting the resulting speeds of rotation for the operating conditions of the inventive .apparatusaccording to FIGURES 2, 5, 6 and 7;
  • FIGURE 9 is a graph depicting yarn tension before and after the yarn delivery device
  • FIGURE 10 is a perspective view of a second embodiment of inventive precision cross-winding apparatus.
  • FIGURE 1 1 is a circuit diagram for the embodiment of winder apparatus depicted in FIGURE 10.
  • the yarn 2 or otherwise travels from a conventional reel 1 via a resiliently biased stop motion or cut-off arm 3 to a deflecting roller 4 or equivalent expedient, then back to the stop motion or cutoff arm 3 and, thereafter, passes from a conventional paraflining device 5 to a yarn delivery device 6.
  • the yarn delivery device 6 is formed of a pair of cylinder rollers or drums 6a, 6b.
  • this yarn 2 travels via a moistening apparatus 7 through a conventional brake or yarn tensioning device 8, over a stop motion or cut-off bracket 9, then over the to-and-fro moving yarn guide 19, between the pressure roller 11 and the cross-wound yarn package or cheese 12 carried by the bobbin spindle, generally indicated at reference 12a of FIGURE 4, and the sleeve 12!), to then become wound onto the surface of such yarn package 12.
  • the yarn package 12 is rotatably mounted upon a bracket 13 neighboring the pressure or support roller 11.
  • the bracket 13 in turn is pivotally mounted to a hub or sleeve 32.
  • the relatively long stop motion arm 3 which is pulled upwards by adjustable spring force and the multiple wrapping of the yarn 2 about such stop motion arm 3 and the roller 4 prevents stretching or rupture of the yarn 2 upon sudden interruption in the delivery of yarn due to possible pay-off disturbances at the reel 1. Due to the described arrangement a suflicient reserve of yarn is provided which is then payed-0E by pivoting the stop motion arm 3 through a certain angle in clockwise direction until the pay-off disturbance at the reel is automatically removed.
  • the stop motion arm 3 is pulley downwardly through the mentioned predetermined angle, and in this case, then, actuates a switch 14 (FIGURE 6), whereby a current circuit 15 is closed.
  • An electromagnet 16 is located in this current circuit 15 which, upon excitation, brings to standstill the relevant winding station or location W in a manner to be described more fully hereinafter.
  • Shutdown of the winding station W can also be achieved by the stop or cut-oif yarn feeler bracket 9 in that such can likewise close this current circuit 15 by means of a switch 17 if, due to yarn rupture or depletion of the yarn at the reel 1, the yarn tension after the yarn tension or brake device 8 disappears, and
  • FIGURE 2 there is illustrated in perspective view the details of an exemplaryembodiment of drive and control for a winding station W and it should be understood that in order to render the drawings more understandable the spatial position of some of the elements relative to one another has been shifted from the actual position they would occupy at the machine and also the elements are not shown exactly to scale. This, however, should not impair in any way a clear understanding of the inventive apparatus since the actual cooperation between the various components of the described system is fully explained.
  • the course of travel of the yarn 2 is analogous to that described in conjunction with FIGURE 1 and should be kept in mind when considering the arrangement of FIGURE 2.
  • FIGURE 2 all elements which are not concerned with the drive have not been illustrated, that is, only those components of the inventive apparatus necessary to understand the underying teachings of the invention have been depicted in FIGURE 2.
  • a shaft 18 extends over the entire length of the machine and is driven by a non-illustrated electric motor.
  • This shaft 18 serves as common drive shaft for all winding stations W.
  • a respective friction wheel or disk 19 is arranged upon this drive shaft 18 in the region of each winding apparatus.
  • Each of these friction wheels or disks 19 is connected for rotation through the agency of a relatively long hollow cylindrical hub 20 with the drive shaft 18, yet is displaceable in axial direction.
  • a helical spring 21 arranged in the annular compartment 20a between drive shaft 18 and hollow hub 20, bears at one end 21a at an entrainment pin 22 providing the rotational connection and at the other end 21b at the hollow hub 20 and friction disk 19 respectively.
  • This spring 21 has the tendency to always press friction disk 19 against the largest diameter of a friction plate or wheel 23 cooperating with it.
  • Friction plate 23 is rotatably connected via a key or wedge 24 with a shaft 25 and is axially displaceable upon such. Moreover, friction plate 23 is pressed by means of a spring 26 against the friction disk 19, so that both are positively coupled with one another by friction.
  • a shift or control fork 27 engaging in an annular groove 28 at the hub 23a of the friction plate 23 is in operable connection via pull rod 29 with the previously considered electromagnet 16 (FIGURES 5 and 6), so that upon excitation of such electromagnet 16 the friction plate 23 is pulled away from the friction disk 19 against the action of the spring 26 (FIGURE 6), thereby interrupting the positive drive connection between these members.
  • Shaft 25 drives the wind-up or take-up yarn package 12 via a belt drive 30.
  • the bracket 13 carrying the Windup yarn package 12 is pivotably mounted via the hub 32 and with respect to the housing 33 of the winding location about two axes.
  • This bracket 13 is pressed via a spring 34 with adjustable force radially towards the pressure or support roller 11, whereas the spring 36 pivots this bracket 13 relative to the hub 32 such that the yarn package 12 during rotation always bears along a surface line at the pressure roller 11.
  • the support for the pressure roller 11 and the guide means 37 for the yarn guide 10 are fixedly connected in non-illustrated manner with the housing 33.
  • a second friction disk or wheel 38 is positively coupled by friction with the friction plate 23 at the face or side of this friction plate 23 which is opposite the friction disk 19.
  • This second friction disk 38 which is displaceably mount ed upon a shaft 39 is rotatably mounted at a cylindrical support 40 and drives via the shaft 39 and a belt drive 41 the transmission roller 42, the belt drive 43, and the shaft 44.
  • the shafts 44 and 45 which carry the cylindrical rollers or drums 6a, 6b of the yarn delivery device 6 are rotatably connected with one another via a suitable belt or cord drive arrangement 46, are disposed in one plane, yet are at a certain angle with respect to one another so that the yarn 2 wrapped about both drums 6a, 6b of the yarn delivery device 6 follow a naturally ascending or increasing line i.e. screw line, and special yarn guides are not necessary, as would be the case for instance with yarn delivery devices having only one drum where the individual wrappings have to be separated from one another by means of a comb or the like.
  • a threaded spindle 48 is mounted beneath and parallel to the drive shaft 18.
  • Spindle 48 carries a nut 47 which is parallelly guided by guide rail means 49.
  • Nut 47 carries a pressure roller 51 at a support or holder 50 which is rigidly connected with it, and against which bears the friction plate 19 pressed by the spring 21 towards the largest diameter of friction plate 23. Due to appropriate rotation of the spindle 48 it is possible to displace the friction wheel or disk 19 towards the center of the friction plate 23, whereby the speed of rotation of the winding station drive shaft 25 increases in stepless or infinitely variable manner. If the spindle 48 is rotated in the opposite sense the friction disk 19, under the action of the spring 21, follows the pressure roller 51 and the rotational speed of this drive shaft 25 decreases in stepless manner.
  • a further threaded spindle 52 is arranged beneath and parallel to the shaft 39.
  • This spindle 52 carries a nut member 54 which is parallelly guided by the guide rail means 53.
  • a rocker arm 55 constructed at its upper end in the form of a sleeve 56 is articulated at 55a to the nut member 54.
  • This rocker arm 55 is pressed towards the friction plate 23 by means of a blade or leaf spring 57 fixedly screwed or otherwise fastened onto the nut member 54.
  • the cylindrical support 40 for the shaft 39 and the friction disk or Wheel 38 is seated for lengthwise displacement in the sleeve 56 and can be fixedly clamped by means of an adjustment or winged set screw 58.
  • the arrangement of the friction disk 38 brings about that adjustment of the speed of rotation takes place forcibly in both directions by means of the spindle 52 and the nut 54, and that the frictional drive of the friction disk 38 with the friction plate 23 is continually maintained by means of the leaf spring 57.
  • the frictional drive between the friction disk 19 and the friction plate 23 can be released by the control or stop motion arm 3 via switch 14 or by the stop bracket 9 via switch 17, since by means of any one or both of these switches 14, 17 the current circuit 15 is closed, the electromagnet 16 excited, and thus the control or pull rod 29 pulled into such electromagnet.
  • each diameter of the increasing yarn package 12 corresponds to a certaln position of the friction disk 1'9 driving the package winding spindle 12a and which is ensured for by control means to be described more fully later. From the requirement that the yarn speed or velocity is maintained constant or only increases slightly throughout the entire formation of the yarn package 12 it follows that the speed of rotation of the package spindle 12a must be reduced with increasing diameter of the yarn package 12. This is achieved by displacing the friction disk 19 at the friction plate 23 from the inside towards the outside.
  • the yarn velocity or speed V is plotted as a function of the yarn package diameter D, the curve 59 representing the course of this yarn velocity.
  • the requirements exists that there is maintained the proportionality or ratio of the peripheral speed of the drums 6a, 6b of the yarn delivery device 6 with respect to the yarn speed, and that the peripheral speed of these drums of the yarn delivery device 6 must be higher than the yarn speed by a certain amount throughout the entire formation of the yarn package, namely by the amount of the slip.
  • the gear 61 of FIGURE 2 is selected to be larger than the gear 62, there results for the spindle 52 a higher speed of rotation, for the friction disk 38 a larger adjustment path and, consequently, for the drive of the yarn delivery device 6 an increased rotational speed.
  • Such analagously corresponds to an increasing peripheral speed of the rollers or drums 6a, 6b of the yarn delivery device 6.
  • two gears 61 and 62 which are unequal in size, it is possible to employ two equally large gears. In this case, then, two adjusting spindles 48 and 52 with different thread pitch provide the desired compensation.
  • the slip re. the speed difference between the yarn speed and the peripheral speed of the drums of the yarn delivery device, can be optionally adjusted in that the basic position of both friction disks 19 and 38 can be changed relative to one another, specifically by displacing the cylindrrcal support 40 in the sleeve 56 (FIGURES 2 and 5).
  • the control of the first drive or rotational speed variator 19, 23 and the adjustment of its frictional wheel or disk 19 as a function of the increasing diameter of the yarn package 12 takes place by means of a servo-follower control device, illustrated by way of example in the circuit diagram of FIGURE 7.
  • the main components of such control device embody a bridge circuit A, the switching or control emplifier B and the servomotor M, in addition to the-necessary switch elements.
  • the second potentiometer 67 has its setting made directly dependent upon the position of the nut 47, the control roller 51, and the friction disk 19. Both of the potentiometers 64 and 67 provide in the bridge circuit A,
  • transmitters which must be correlated to one another, whereby the transmitter 64 (FIGURE 7) is positively controlled and the second transmitter 67 follower controlled in that, depending upon the setting of the transmitter 67 with respect to the position of the transmitter 64 the conrol element e.g. relay 70 or 71 is actuated by the control amplifier B.
  • the conrol element e.g. relay 70 or 71 is actuated by the control amplifier B.
  • both of these control or switch elements 70 and 71 are shown in their rest positions.
  • the electric motor M is coupled in a current circuit 72.
  • Such motor M is provided with a contact 73 for rotation in counterclockwise direction and a contact 74 for rotation in clockwise direction.
  • the worm 69 is seated upon the elongated adjustment spindle 48 also is this motor M and it is rigidly connected for rotation with such spindle 48.
  • the control or switch element 71 responds and actuates the doublethrow switch 75, i.e. contact 73 is open and contact 74 closed. Consequently, the current circuit 72, 74, 77 is closed and the electric motor M rotates in clockwise direction.
  • the position of the transmitter 67 is also forcibly changed in the sense that it lags or trails behind the transmitter 64 until it has reached the latters setting and, thus, the double-throw switch 75 returns back into its rest position by means of the switch element 71, the current circuit 72, 74, 77 being opened and the motor M shut-off. If, for any reason, the transmitter 67 leads the transmitter 64, then the control or switch element 70 responds and via the double-throw switch 77a closes the contact 76. Now, the current circuit 72-76-73 is closed and the electric motor M rotates in counterclockwise direction until there is reached a position of balance for both transmitters 64 and 67, the switch 77a returns back into its rest position, the motor M again coming to standstill.
  • one of a diiferent physical type could be provided, such as mechanical-electrical, whereby two condition-dependent points serving as transmitter means can be articulated with one another by a rod, to both sides of the center of which a respective switch-in switch and switch-out switch are mounted in operable cooperation with this rod and in such a manner that when pressure is exerted upon such switches the corresponding current circuit is closed.
  • the one transmitter point is in adjustment-connection with a servomotor M and if the other is adjusted to positively lead or trail, then in analogous manner the switch disposed before or after the rod responds, whereby such controls the motor for running tothe right or left and the secondary transmitter point is permitted to follow the primary until reaching the balance position.
  • the described exemplary embodiment of precision cross- Winding apparatus due to connecting in series two rotational speed variators whose adjustment mechanism are positively or forcibly coupled in a certain ratio and dependency upon one another and wherein the relative base adjustment of the rotational speed variators can be changed with respect to one another for the purpose of accommodating the slip to the particular properties of the material being processed, i.e. accommodation of the difference of the yarn speed onto the yarn package to the peripheral speed of the drums of the yarn delivery device, renders it possible to process into Wound yarn packages of high quality the most different windable materials.
  • FIGURE 9 there is plotted along the ordinate yarn tension in grams (g.) and the yarn tension curve before the yarn delivery device 6 is designated by reference character 78 and after such by reference character 79.
  • the correspond ing locations have been designated in FIGURE 1 also by reference numerals 78 and 79.
  • FIGURES 10 and 11 The second embodiment of cross-winding apparatus according to FIGURES 10 and 11 considerably corresponds to the previously described first embodiment already considered in detail.
  • reference character W generally designates the winding station or apparatus and reference character 6 the yarn delivery device.
  • the threaded spindle 48 carries a friction wheel or disk 102 and the adjustment spindle 52 a friction disk or wheel 103.
  • a friction wheel 104 couples both friction disks 102, 103 with one another.
  • the shaft 105 is mounted in a support 106 which is displaceably guided in any suitable known manner in axial direction and, for instance, can be displaced by means of a non-illustrated, conventional hand wheel and an adjusting spindle.
  • the elements 102, 103 and 104 thus form a further infinitely variable drive, by means of which the ratio of the setting or adjustment of both spindles 48 and 52 can be changed with respect to one another.
  • a scale 108 with which cooperates a pointer 107 connected to the support 106 it is possible to read-out the functional relationship of yarn package speed of rotation and yarn package diameter and the yarn speed.
  • the rod 29 of the shutdown or stop motion device which removes the friction plate 23 from contact with the friction wheel or disk 19, is operably associated with a switch 109 which is actuated i.e. opened by the rod 29 when shutdown occurs.
  • This switch 109 is arranged in the bridge circuit A of the follower control device, the circuit diagram of which is depicted in FIGURE 11. At that side of the circuit which corresponds to the tap-off location during winding of smaller yarn package diameters i.e. thus corresponds to larger rotational speeds, there is connected in front of the reference transmitter 64 and parallel to the switch 109 disposed in the branch circuit 111 a so-called disturbance resistance whose resistance value is comparatively quite large.
  • This reference transmitter 64 is provided at the opposite side with a series connected potentiometer 112 which can be adjusted from a resistance value null up to a very high value in comparison with the resistance of the transmitter 64.
  • the potentiometer 112 i provided in known manner with a scale.
  • the control rod 29 releases the cut-off or stop switch 109 and such again closes the shunt connection 111, whereby the series resistor 110 is switched-out or bridged.
  • the conditions prevailing .at the tr nsmitter 64 directly prior to standstill of the relevant Winding-location W are again brought about, whereby the transmitter 67 is caused to hurry behind the transmitter 64 until it reaches the setting which the transmitter 67 had directly prior to bringing the winding location to standstill.
  • the winding operation begins with the smallest yarn package or bobbin spindle-rotational speed and with the smallest yarn speed, in order thereafter to be uniformly accelerated until reaching the value possessed directly prior to interruption of winding.
  • the potentiometer 112 coupled with the transmitter 64 renders it possible to adjustably increase the resistance of the positively controlled branch of the measuring bridge A. Due to the direct dependency of the transmitter 64 upon the diameter of the wound yarn package 12 the coupled-in resistance of the potentiometer 112 is mechanically not taken into consideration. Electrically, on the other hand, the entire or total resistance (resistance of transmitter 64 and the coupled-in resistance of the potentiometer 1 12) confronts the unchanged resistnce of the trailing transmitter 67.
  • This increase of the peripheral speed of the yarn package 12 is accommodated to the peripheral speed of the rollers or drums 6a, 6b of the yarn delivery device 6 in that, the transmission ratio of the infinitely variable drive 102, 104, 103 between the adjustment spindles 48 and 52 (FIGURE 10) is changed by displacing the friction disk 104 between both of the planar friction disks 102 and 103.
  • the relationship of the peripheral speed of the drums 6a, 6b of the delivery device 6 to that of the increasing yarn package 12 throughout the entire diameter range is also then maintained if the yarn speed is continuously increased by coupling a resistance 112 with the transmitter 64.
  • Adjustment or setting of the friction disk 104 takes place in accordance with the scale 108, the division and markings of which are preferably in a logical relation to the scale of the potentiometer 112. It will be appreciated that both of the elements which are to be adjusted can also be coupled with one another by suitable non-illustrated mechanical elements or other suitable elements.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, comprising at least one winding station for winding yarn into a yarn package, a yarn delivery device for feeding yarn to said winding station, an infinitely variable drive including adjustment mean-s provided for said winding station to effect winding of the delivered yarn into said yarn package, means for checking the diameter of the yarn package cooperating with said infinitely variable drive for influencing the rotational speed of said yarn package as a function of the increase of its diameter, a further infinitely variable drive including adjustment means operatively connected with said infinitely variable drive for said yarn package and coacting with said yarn delivery device, and means for forcibly conjointly actuating in a predetermined relationship said adjustment means of both of said infinitely variable drives.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 1 wherein said actuating means for both said adjustment means comprises a pair of cooperating gear members possessing a predetermined transmission ratio.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 1 wherein said actuating means for both said adjustment means comprises another infinitely variable drive which enables said predetermined relationship to be selectively altered.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 1 further including control means responsive to operation of said yarn package diameter checking means for controlling both said adjustment means of both said infinitely variable drives via said actuating means.
  • control means including a servomotor for operatmg both of said adjustment means via said actuating means, a follower control mechanism for influencing operation of said servomotor, said follower control mechamsm including an actual value transmitter operably coupled with said adjustment mechanisms of both said infinitely variable drives and a reference value transmitter operably coupled with the yarn package.
  • said reference value transmitter including a gear
  • said yarn package diameter checking means incorporating a prvotably mounted support for carrying th yarn kage and a gear element meshing with said gear of said reference value transmitter.
  • each of said adjustment means for both infinitely variable drives incorporates a threaded spindle and a nut member displaceably carried by said thread d 1 1 spindle, said actuating means for both said adjustment means including a transmission gear unit for driving interconnection of said threaded spindles, one of said threaded spindles being coupled with said servomotor.
  • both of said infinitely variable drives incorporate friction disk means, one of said friction disk means providing a driven disk for said infinitely variable drive for said yarn package and at the same time a driving disk for said further infinitely variable drive for said yarn delivery device.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 8 wherein said further infinitely variable drive incorporates a friction disk member driven by said driven disk provided by said one friction disk means, and means mounting said friction disk member and said one friction disk means so as to be conjointly displaceable in order to bring to standstill the associated winding station.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 1 wherein said yarn delivery device incorporates a pair of drum members disposed substantially in a common plane and the lengthwise axes of which enclose an acute angle.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 1 further including control means responsive to operation of said yarn package diameter checking means for controlling both said adjustment means of both said infinitely variable drives via said actuating means, said control means incorporating a servomotor for operating both of said adjustment means via said actuating means, a shutdown mechanism for interrupting the yarn winding operation at said winding station, said shutdown mechanism exhibiting a switch which when in open condition actuates said servomotor such as to reduce the speed of rotation of said infinitely variable drives.
  • Precision cross-winding apparatus particularly for winding stretchable and elastic yarns, as defined in claim 11, and control means further including a follower control mechanism possessing a control circuit, said switch being coupled in said control circuit.
  • said control circuit including a bridge connection, a reference value transmitter coupled in said bridge connection, a disturbance resistance capable of being connected in series with said reference value transmitter via said switch.
  • said actuating means including another infinitely variable drive for forcibly conjointly actuating both of said adjustment means of said infinitely variable drives and for selectively altering said predetermined relationship.
  • a precision cross-winding apparatus particularly for winding stretchable and elastic yarns, comprising at least one Winding station for winding yarn into a yarn pack-age, a yarn delivery device for feeding yarn to said winding station, an infinitely variable drive including speed adjustment means provided for said winding station to efiect winding of the delivered yarn into said yarn package, a further infinitely variable drive including speed adjustment means operatively connected with said infinitely variable drive for said yarn package and coacting with said yarn delivery device, and means for forcibly conjointly actuating in a predetermined relationship said adjustment means of both of said infinitely variable drives.

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Cited By (3)

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US3532280A (en) * 1967-02-23 1970-10-06 Mackie & Sons Ltd J Textile winding machines
US3855676A (en) * 1971-08-03 1974-12-24 Teijin Ltd Apparatus for drawing, separating and winding filament
US5017211A (en) * 1987-09-23 1991-05-21 Ciba-Geigy Corporation Heterocyclic compounds

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Publication number Priority date Publication date Assignee Title
US1952782A (en) * 1931-08-08 1934-03-27 Kent D Steadley Automatic means controlling feed of wire to wire working machines

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US1952782A (en) * 1931-08-08 1934-03-27 Kent D Steadley Automatic means controlling feed of wire to wire working machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532280A (en) * 1967-02-23 1970-10-06 Mackie & Sons Ltd J Textile winding machines
US3855676A (en) * 1971-08-03 1974-12-24 Teijin Ltd Apparatus for drawing, separating and winding filament
US5017211A (en) * 1987-09-23 1991-05-21 Ciba-Geigy Corporation Heterocyclic compounds

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AT262859B (de) 1968-06-25
CH413681A (de) 1966-05-15

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