IL37317A - Textile machine yarn storage and advancing method and device - Google Patents

Description

Textile Machine Yarn Storage and Advanc ng Device Jonathan TEXTILE MACHINE STORAGE AND ADVANCING DEVICE Abstract of the Disclosur The with textile machine having instrumentalities for performing operations upon yarn including positive feed means for advancing the of means for storing a plurality of packages of yarn and supplying the yarn to the associated textile machine under controlled In certain textile yarn is supplied to textile machines performing an operation using the yarn and including operating lities for positively feeding yarn from packages to other operating instrumentalities of the In such textile it has tofore been necessary to package yarn carefully or in a particular manner in order to assure smooth advancement of the yarn to the positive feeding instrumentalities of the textile Such preparation of yarn to be supplied to the textile operation has usually in the overall an additional or packaging step for the One specific example of the type of textile operation and machine such a situation has heretofore created difficulties is the supply of yarn to a knitting machine producing double knit In order to assure acceptable uniformity In the fabric such machines conventionally include positive yarn advancing means for gripping the ends of yarn supplied to the knitting machine and positively controlling the rate at which such ends in tension of yarn supplied to the positive feeding means have been noted to have detrimental on the quality of the fabric uniformity of tension in yarn supplied to a knitting machine of the type described above ha a been sought by winding the yarn into a package configuration from which ready advancement is assured Immediately prior to creeling at the Such an additional winding or packaging step both increases the time and cost of preparing the yarn for knitting and exposes the yarn to possible breaking or other Such deficiencies difficulties desirably could be avoided by eliminating the presently required winding or packaging step and assuring that proper advancement of yarn could be obtained without regard to the specific type of package in which the is formed by the next preceding process or the condition of the yarn in such a a difficulty encountered with packages other than those wound for free advancement of the yarn to the positive feed means of a knitting machine has been that significant fluctuations or variations in tensio occur as the yarn is withdrawn from the More where the package has undergone a finishing process such as bulking or the yarn compressed in the package so as to be somewhat Removal of the yarn from such a package proceed easily and freely for a certain incremental length and upon the occurrence of a suddenly encounter a high tension condition as the yarn Is pulled free from Such tension fluctuations may reduce the quality of the fabric produced by a knitting machine to such a point as to be and p iarticularly with fragile such tension fluctuations lead to snapping or breaking of ends of the with With certain types of yarns used in the production of double knit smooth operation of a knitting machine to which the yarns are fed requires that the yarns be treated with a suitable in a process referred as The oiling of yarns for knitting into fabrics has previousl been conducted as a separate step or operation in the preparation of yarns fo supply to the knitting either in conjunction with a winding step as discussed above or as an independent operation separate and apart from such winding of the yarns into a package configuration from which ready ment is the foregoing in it is an object of the present invention to provide in with a textile machine having operating instrumentalities including positive feeding for positively advancing a plurality of ends of yarn to the associated textile machin under controlled conditions of tension and in such a manner as to screen out and eliminate tension fluctuations resulting from uneven release of the yarn from packages In accomplishing this object of this apparatus provided for controlling the tension of each end of yarn at a predetermined level as such ends are moved along predetermined paths of travel to the positive yarn feeding Control over the tension of each end of yarn is obtained by the cooperation of yarn engaging roll means disposed in the predetermined paths of yarn travel for engagement with each end of yarn moving along those means for driving the yarn engaging roll means rotation with a predetermined linear surface and yarn tensioning mean for exerting a determinable restraining force on each of the ends of yarn to the ends engaging the roll means and after engagement with a portion of the roll By such the tension in the plurality of ends of yarn at the yarn feeding means maintained substantially even fluctuations of tension n the yarn as the same removed from yarn supply packages and advanced through yarn tensioning means to the yarn roll provision Included for applying to the ends of yarn a suitable lubricant for facilitating manipulation of the yarns during the tion of a Some of the objects and advantages of the having been others appear the description taken in connection the accompanying Figure 1 Is an elevation partially of the combination of the present nvention textile machine and an apparatus for controlling the tension of each of a plurality of ends of yarn as the same are moved along predetermined paths of travel to the operating instrumentalities of the textile Figure 2 is an enlarged elevation of the yarn tension control apparatus of Figure n partial Including a partly schematic showing of a control system for certain elements Figure 3 is a reduced side etevatlon taken generally as Indicated by the arrows in Figure Figure 4 Is an enlarged partial of the yarn engaging roll means and other portions of the yarn tension controlling atus of Figure Figure S an enlarged Illustration of the first roll member shown schematically Figure and Figure 6 an enlarged of the upper yarn feed ing now more particularly to the the present invention is there Illustrated as the a knitting machine 10 having knitting instrumentalities and means for positively feeding plurality of ends of yarn Y to the knitting instrumentalities at a predetermined demand rate feet per of an apparatus 12 for controlling the tension of each of the ends of yarn Y at a predetermined tension level as the ends are moved along predetermined paths of travel to the knitting machine At the should be understood that the disclosure herein of the combination of invention in a form w the associated textile machine a knitting machine and the apparatus for controlling the tension of each end of yarn endently of the machine and spaced some distance therefrom is illustrative and that present invention contemplates that the combination may have broader utility and be susceptible to other arrangements and so long as the principals of operation pointed out hereinafter are The details of the apparatus become more clear by to the various elevations and section of Figures those may be seen that the apparatus 12 comprises a structural frame composed of four substantially vertical corner members 14 and a number of members 16 extending A plurality of package supports 18 are secured to the structuai members and the package supports 18 the ends of yarn Y to be supplied to the knitting machine The supports 18 are adapted to receive eon yarn packages P which in one operating embodiment of the present invention corresponding to the combination illustrated in Figure dye tube packages as received from the dyeing and bulk setting process used for predetermined paths of travel to be supplied to the knitting machine as will be described In full detail Interposed along the predetermined paths of travel for the ends of yarn Y from the packages P to the knitting machine 10 are yarn engaging roll means for engagement with each end of yarn tensioning means for exerting a determinable restraining force on each of the ends of the yarn disengaging means for displacing the ends of yarn from the predetermined paths of travel upon stopping of the knitting machine stop means responsive to an improper operating condition reflected in the tension of the ends of yarn Y and operative for stopping the knitting machine and treatment applying means for plying a treatment liquid to ends of yarn as they are moved along a predetermined Each of these means be deecribed in greater detail hereinafter and the operative relationships therebetween discussed In The yarn Y from the packages P directed through a of plates and 22 eyelets 24 therein to a conventional disc type device From the tensioning device 26 yarn passes over an oiling roll 28 and through the eyelets 30 of the plate member From the plate member 32 the yarn Y takes several wraps on the roll member 34 and Is directed to a second roll member 36 through a second conventional type tensioning device The yarn Y then takes several wraps around the second roll member 36 and fed to the circular knitting machine 10 over a second oiling roll 40 through a conventional stop motion switch In the where the associated textile machine a knitting machine the positive feed means for the ends of yarn Y conventionally be a tape and cylinder drive Indicated at 44 in Figure 1 Such a yarn as a plurality of relatively cylinder members positioned above and about the needle cylinder of the knitting machine 10 and individually supported for rotational endless tape member 4Θ is positioned encircling the cylinder members 46 and in contact h portions of the peripheries The endless tape member 43 is driven in rotation by a drive which is operatlvely connected to the drive arrangement for the knitting ities of the knitting machine to be driven in rotation in coordination the knitting of yarn Upon the drive pulley being driven in the endlees tape 46 is advanced adjacent and in contact the peripheries of plurality of cylinder members to drive the in rotation at a predetermined speed correlated to the formation of stitches by the knitting machine A single end of yarn Y is passed between the engaging surfaces of each cylinder member 46 and the endless tape to be gripped tween and advanced to the knitting machine 10 at a rate correlated to the use of by the knitting Instrumentalities In this particular the primary function intended for the cylinder 46 and tape 43 to control the rate of advance of the ends of yarn and fluctuation tension the ends of yarn at the positive feeding means significantly disturbs operation of the knitting machine the textile machine of the combination of will be upon the occurrence of an improper operating condition such as a broken end or excessively high tension in the yarn being supplied in order to minimise the production of poor quality For this the apparatus 12 preferably includes stop motion devices similar to types conventionally employed with textile machines such the knitting machine In a plurality of the electrical switch means equaling in number the number of the ends of yarn Y passing from the apparatus 12 to the knitting machine are mounted on the work of the apparatus 12 for passage of the ends of yarn Y therethrough immediate the rollers 34 and 36 and the positive feeding means 44 of the knitting machine Such electrical devices are highly are actuated in response to the absence or excessive tightness of a yarn passing therethrough and are adapted for connection to the electrical system supplying current to a motor driving the knitting machine Should the stop motion switches 42 sense a broken or excessively slack or tight end of yarn the knitting machine 10 will be stopped while the motors 50 and 52 continue to drive the roll members and oiling rollers 23 and 40 in rotation and the rods 54 and 56 are moved to displace the ends of yarn Y from the path of travel and avoid loosening of the ends of yarn intermediate the apparatus 12 and the positive feed means 44 of the knitting machine 10 and excessive wicking of treatment liquid into the yarns during such Looking now in detail to Figures the tension and yarn feed control will be As pointed out oiling rolls 28 and 40 are used to oil the Oiling roll 28 Is located downstream of roll member 34 and oiling roll 40 is located upstream of roll member Both of the oiling rolls are mounted for slow rotation partially within a liquid retaining trough 55 in a direction opposite to the movement of the ends of yarn The amount of oil deposited on yarn Y by the oiling roll 28 is only enough to prevent or low molecular polymerization product build up on the roll members 34 36 and to decrease the frictional of the yarn The second oiling roll 40 supplies necessary lubricant to properly knit the yarn Y that cannot be supplied by the oiling roll 23 due to the tendency of the oil to build up on the rolls 34 and 3 Aa with the oiling roll 28 the oil supplied to the yarn tends to reduce build up at the decreases the frictional resistance of the yarn in the case of reduces the amount of lint and fly As briefly the rods 54 and 56 are pivoted to ths dotted line position whenever the knitting machine is stopped to pull the yar Y out of engagement the oiling rolls and 40 to prevent of eking of oil into the Looking again to Figures and especially Figure 4 the yarn tension control is shown in The yarn It is drawn off the packages tends to vary tension duo to frictional characteristics of the yarn packag The disc type tension regulator 26 adjusted to place the yarn the regulator and the roll member 34 at a much higher tension than the yar being fed to the This tends to compensate for a portion of the variation of yarn tension coming off the package since this variation in percentage is substantially less than it was prior to into the tension The drive means for the roll members 34 and 36 are adjusted to a predetermined speed selected for the yarn in use to a linear surface speed for the rolls in of the demand rate of the positive feed means 46 of the knitting machine Preferably this speed on the order of times the speed of positive feed means As is well known in accordance with the laws of frictional the tension of the yarn between the regulator 26 and the roll member 34 is equal to the tension of the yarn leaving the roll member times the base of natural logarithm raised to times This is expressed by the formula where equals entering equals tension e equals equals coefficient in sliding friction for the yarn on the surface of the overdrive and equals the angle subtending the arc of contact between the yar and the roll measured in It can thus be seen that the exit tension t will be less than the entering tension by an amount which depends on the frictional characteristic of the roll member and the amount of wrap thereby also reducing the initial amount of tension variation in the yarn from the In the preferred form of the see Figures 5 and at least three wraps of yarn Y are made around the rolls 34 and 36 to obtain the desired tension at the positive feed means 46 of the knitting When the yarn Y leaves the roll member the tension on the yarn is substantially reduced and the process is again repeated by supplyin the yarn Y to the disc type tension regulator 38 and to the overdrive roll member prior to contact with the oiling roll 40 prior to being knit into fabric In the preferred form of the the roll member 34 will have a matte chrome plated finish while the roll member 36 will have a highly polished chrome the present invention contemplates that the finish of the roll members 34 and 36 can be selected to accommodate the particular yarn or yarns Although I described detail preferred of I contemplate that many changes may without from the or spirit of invention and I to be only by insufficientOCRQuality

Claims (1)

1. ΕΓΗΑ Τ WHICH IS C LAIMED The method of supplying yarns under controlled tension conditions to a textile machine having yarn means for a plurality of yarns at predetermined demand rates and comprising the step directing yarn from a plurality of yarn packages of uneven density and yarn release characteristics along predetermined paths of travel to the textile machine while applying a predetermined tensioning force to each of the yarns to provide at least a predetermined minimum amount of tension therein and to at least partially compensate for the varying amounts of tension in the yarns due to the yarn package characteristics and wrapping said yarn a plurality of times around an overdriven roll member to feed each of the tensioned yarns at a linear speed greater than the predetermined demand rates while pulling the yarn from the corres ponding one of said packages to the textile and while reducing the amount of tension in each of the tensioned yarns in a predetermined ratio to further compensate and reduce the amount of variations in tension in the yarns by slipping the yarns in a controlled method according to Claim 1 and further comprising the step of subjecting the yarns to a fluid treatment during passage thereof from said packages to the textile machine being in preparation for a subsequent process to which the yarn is to be The method according to Claim 2 wherein the yarn is subjected to a further fluid treatment after said subsequent yarns to a textile machine having a ising the steps directing yarn predetermined paths of applying to compensate for the varying amounts arn package characteristic driving a ter than the predetermined demand by wrapping said yarn a plurality applying further predetermined second roll member at a linear speed and reducing the tension in l by said yarns around said times and supplying said yarns to said o Claim 4 and further comprising the id treatment during passage achine being in preparation the yarn is to be o Claim 5 wherein the yarn is subjected aid subsequent with a textile machine having operating instrumentalities including positively feeding a plurality ends of to other operating instrumentalities of the machine at a demand of apparatus for controlling the tension each end of yarn at a predetermined tension level as such ends are moved alon predetermined paths of travel to said positive yarn feeding said apparatus means spaced from said textile machine operating instrumentalities for a plurality of yarn supply yarn engaging roll disposed in said predetermined paths of travel e package support means and said yarn feeding means with of yarn moving along said predetermined yarn tensioning means disposed intermediate said package support means and said roll means for exerting a determinable restraining force on sc of said ends of means for driving said roll means in rotation with a linear surface speed greater than said predetermined demand r to reduce the tension in each of said ends of yarn from that resulting from said yarn tensioning means restraining force said predetermined tension level and to maintain a predetermined imbalance therebetween by advancing each end of yarn along said predetermined paths upon such end being drawn into transient frictional engagement with said roll said roll tensioning means and driving means cooperating with each e to maintain substantially constant tension said plurality of ends of yarn at said feeding means even during fluctuation of tension therein between said yarn supply packages and said tensioning and means to apply a fluid treatment to the yarns between said yarn engaging roll yarn feeding luid treating yarn aging roll he yarn hen said aging roll n rovided to ng roll mean id treating yarn gaging roll he yarn out said positive insufficientOCRQuality