US3911698A - Thread feeding device for inserted weft knitting machines - Google Patents

Thread feeding device for inserted weft knitting machines Download PDF

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Publication number
US3911698A
US3911698A US484650A US48465074A US3911698A US 3911698 A US3911698 A US 3911698A US 484650 A US484650 A US 484650A US 48465074 A US48465074 A US 48465074A US 3911698 A US3911698 A US 3911698A
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Prior art keywords
yarn
package
packages
elastic
carrier
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Expired - Lifetime
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US484650A
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English (en)
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Richard L Walford
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JP Stevens and Co Inc
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JP Stevens and Co Inc
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Priority to US484650A priority Critical patent/US3911698A/en
Priority to AR259461A priority patent/AR207987A1/es
Priority to CH837375A priority patent/CH594766A5/xx
Priority to CA230,453A priority patent/CA1028164A/en
Priority to DE752529126A priority patent/DE2529126C3/de
Priority to IT24929/75A priority patent/IT1039546B/it
Priority to IL47603A priority patent/IL47603A/xx
Priority to GB27664/75A priority patent/GB1519622A/en
Priority to JP50081364A priority patent/JPS5123353A/ja
Priority to AT505875A priority patent/AT341066B/de
Priority to AU82608/75A priority patent/AU494343B2/en
Priority to BR5284/75D priority patent/BR7504127A/pt
Priority to FR7520670A priority patent/FR2277167A1/fr
Priority to NL7507811A priority patent/NL7507811A/xx
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Publication of US3911698A publication Critical patent/US3911698A/en
Assigned to BANKERS TRUST COMPANY, A NY BANKING CORP. reassignment BANKERS TRUST COMPANY, A NY BANKING CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: J.P. STEVENS & CO.
Anticipated expiration legal-status Critical
Assigned to J.P. STEVENS & CO., INC. reassignment J.P. STEVENS & CO., INC. RELEASE SECURITY INTEREST & ASSIGNMENT. Assignors: BANKERS TRUST COMPANY
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge

Definitions

  • ABSTRACT Elastic yarns are fed to knitting machines by measuring predetermined amounts of the elastic thread or yarn, which otherwise would be non-uniform in length or degree of stretch because of the high and not a]- ways uniform elasticity of the yarn.
  • Both variants include feeding out from yarn packages by driving the yarn package by friction on its surface.
  • the first variant is for a weft knitting machine, such as a circular knitting machine, and in it a package of elastic yarn is moved along the needle line with a drive roller in contact with itssurface, which roller turns as the package moves. The speed of the roller determines length of the elastic yarn paid out.
  • Knitting is either by a non-elastic yarn which knits around the paid-out elastic yarn in the case of single knit machines, or in the case of double knit machines the paid-out elastic yarn may be sandwiched between the two layers of the double knit.
  • the second variant deals with a multiple-package filling-thread-feeding device for warp knitting machines of the so-called carousel type in which thread from a plurality of packages, which are moved around by an endless chain, is fed to transfer chains provided with pins which carry the filling or weft threads to the knitting line, the motion of the packages stringing successive filling thread lengths from the pins on one chain to the pins on the other, and which provides for intermittent tensioning devices for the thread, for example springpressed discs, the tension being applied to the thread as it is clamped by the pin on one chain, then the tension releases, for example by a cam, until just before reaching the corresponding pin on the second chain and the tension is reapplied.
  • the threading device is modified for feeding elastic yarn preferably by providing the yarn package, having a hollow core, with means for preventing rotation of the core for a portion of the travel of each package from carrier chain to carrier chain, the means preferably which apply a brake to the inside of the hollow core and cam which raises each package during a portion of the stringing from chain to chain which releases the braking means and permits rotation of the cores.
  • the cams are of suitable length so that the elastic yarn is paid out a desired amount.
  • the packages are moved along the cam and are turned thereby. In the unbraked portion of the travel a predetermined length of elastic yarn is paid out. Braking permits a predetermined stretch of the yarn.
  • packages may be on spindles to which intermittently brakes may be applied by any suitable means.
  • Knitting machines and preferably warp knitting machines with inserted weft or filling threads at the knitting line have achieved great commercial success because of the enormous speed possible on the knitting machine as compared with an ordinary loom for weaving.
  • the feed of wefts to a warp knitting machine presented a serious problem because of the great speed of the machine and hence the speed with which thread is taken from a package.
  • the thread or yarn which constitutes the weft is carried to the knitting line, as is conventional in warp knitting machines, bya pair of chains with pins or clips.
  • the thread as it passes the first chain is grasped by an open clip which then closes, normally under spring pressure, and the thread then strings across to the second chain, where the clipping of the pins is repeated, and normally after grasping the thread it is cut, leaving an end. If a single package is used, the thread is fed at speeds reaching 100 miles per hour and more, if the machine is to be used at the maximum speed that the other elements would permit.
  • the Jones device represented an important practical improvement on the original Carman carousel, it was still only useful with yarns which did not stretch readily. Inserted-weft warp-knit fabrics are often desirable with elastic weft yarns, which can produce one-way stretch fabrics if only the weft is elastic or two-way stretch if the warp yarns which are actually knit are also elastic. Such fabrics were not practical on the Jones device, and this left elastic knit fabric to other less efficient and complex feeding configurations.
  • One variant of the present invention deals with an improvement to the Jones knitting machine feed, which improvement permits the use of elastic wefts.
  • the present invention has two variants which, while they have a common feature, are very different in their construction.
  • the first variant is for a weft knitting machine of the single or double knit type, such as a circular knitting machine, which will be the form later on first specifically described, although it will be pointed out that the same features may be used in a weft knitting machine in which the needles are in a straight line and the feed of the weft is first in one direction across the needles and then reversed again across them in the opposite direction and so on.
  • a package of elastic yarn or if multiple yarns are needed more than one package, is moved along the needles, for example around the periphery of a circular knitting machine. The knitting takes place with non-elastic yarns and may be either single or double, but, as will be pointed out below, the elastic weft yarn is laid out by the same means.
  • the package As the yarn package or packages move along the needles the package is turned by friction of a driving roller or face driven, which causes it to pay out the elastic weft yarn at a predetermined rate, i.e., a predetermined length of elastic yarn for each revolution of a circular knitting machine or movement of the package across the needles in the case of a straight knitting machine.
  • the paying out of the yarn is not under tension because the surface of the package turns with the peripheral speed determined by the diameter of the driving roller.
  • an exact predetermined tension may be imparted by having the roller pay out elastic yarn at a slower rate than the movement of the yarn package. While the amount of yarn paid out for a particular rotation of the drive roller is constant, if the roller pays out elastic yarn at a slower rate than the movement of the yarn package along the needles, an exactly determined stretch results. In many weft knitting machines where it is desired to have a certain stretch in the final fabric it is usually essential that this amount of stretch be uniform.
  • the present invention produces the completely uniform desired degree of stretch with the simplest of mechanisms, which permit maximum speed of the knitting machine. This solves an important element of the stretch problem for high speed use because if tension is used and the yarn is pulled through the tension de vice very rapidly, the friction is high and variations in stretchability of the yarn become more serious. It has been stated above that very elaborate mechanisms would be required to provide uniform stretch. This is particularly true with elastic yarns such as Spandex, which is uncovered, a form of yarn which is desired in many knitted fabrics.
  • the present invention in its variant for weft knitting machines is applicable to single knit or double knit.
  • the actual mechanical situation in the fabric is, however, a little different.
  • the non-elastic textile yarn which is knit is knit around the elastic weft.
  • the operation of the weft knitting variant of the present invention performs essentially the same function.
  • the second variant of the present invention deals with warp knitting machines. This is at present commercially the more important one. Here several additional functions are performed over the weft knitting machine, and the present invention finds its greatest commercial advantage in the warp knitting field. While, as will appear from the description below, both variants involve friction surface or face driven turning of the elastic yarn package, their mechanisms are very different; and therefore, as will be seen, the two variants are independently claimed in different sets of claims.
  • the preferred warp knitting variant of the present invention preferably uses a carousel type of warp knitting machine with the improvement of the Jones patent referred to above.
  • the invention will be described in conjunction with a modified Jones machine in which the yarn packages are moved around by a chain on spindles, preferably extending horizontally as is described in the Jones machine rather than vertically as in the original Carman carousel, but the yarn packages are not of conventional construction, i.e., they are not packages which are mounted on spindles attached to the package carrier chains. If it is attempted to use the same design of standard yarn package that is illustrated in the Jones patent with elastic yarn packages, the yarn will stretch varying amounts because it is impossible to adjust tension so that with elastic yarn no stretch results or that a stretch of a predetermined amount results. Therefore, the Jones machine has not proven useful for feeding inserted wefts of elastic yarn or thread.
  • one or more cams on the frame of the knitting machine in addition to the cams which activate and deactivate the tension devices. These cams contact the yarn packages as they move past, causing the packages to turn and pay off a length of elastic yarn equal to the length of the cam. It is usually desirable to have more than one cam so that the paid-out lengths of elastic yarn are not too long. This is of importance as many warp knitting machines are very wide, for example up to inches. As a portion of the yarn is paid out, when it leaves the cam it is desirable to stop the rotation of the package for predetermined distances. This performs two functions.
  • the present invention in its broadest aspect contemplates any means of intermittent braking of the spinning packages at precisely predetermined points and for a precisely predetermined distance of package movement.
  • This can be effected in many ways, for example by separate cams, solenoid operation, and the like.
  • the braking mechanism can be carried by each package itself. These braking mechanisms can be deactivated by the raising of the package as it mounts the entrance ramp of each cam and activated as it is lowered when it leaves the exit ramp. This is very simple, very economical of equipment, and is preferred.
  • the description below, both in general summary and still further below in the description of preferred embodiments, will be in terms of such a modification.
  • the package is of quite different design with a relatively large cross-section hollow core on which the yarn is wound.
  • means preferably a spring attached to the yarn package carrying spindle and another shaft carrying a projecting brake shoe.
  • the inner core cannot turn about the spindle and elastic yarn is strung in a stretched state and/or slack taken up.
  • this turns the shaft carry ing the brake shoe against spring pressure and allows the package to roll freely on the cam and to unwind its elastic yarn under substantially no pressure because, of
  • the cams are arranged so that the packages are raised when the intermittent tensioning means of the Jones machine is also released.
  • the elastic yarn can be strung from carrier into carrier chain at an accurately predetermined tension.
  • the elastic weft is under some tension but the tension should be small so that the fabric does not pucker.
  • the present invention permits stringing the elastic yarn at any desired very low tension, and this can be adjusted by the length of the package raising cam or cams and, therefore, permits stringing elastic yarn under the exact tension desired.
  • the intermittent tensioning can be effected by a number of .means.
  • tensioning means actually set forth in the Jones patent because the particular tensioning means forms no part of the present invention.
  • tensioning means it is, of course, not referring to the braking and relaxation of the elastic yarn packages but rather the spring-pressed discs with wedgeshaped rods shown in the Jones patent.
  • the intermittent tensioning means of the Jones patent which are used only for extremely short periods as the yarn is clamped onto the pins of each carrying chain, are in addition to the braking of the turning packages referred to above.
  • the knitting machine described in the Jones patent need not be extensively rebuilt since the modified yarn packages with hollow cores move over the frame of the knitting machine shown in the Jones patent and the additional cam or cams are readily attachable thereto and preferably should be detachably mounted, for example, by machine bolts, so that cams of various lengths can be provided depending on the particular elastic yarn which is to be fed.
  • FIG. 1 is a plan view of the weft feed transport and carousel in semi-diagrammatic form and illustrates the modification to the standard Jones machine;
  • FIG. 2 is a section along the line 22 of FIG. 1;
  • FIG. 3 is a section at right angles to FIG. 2;
  • FIG. 4 is a section along the line 4-4 of FIG. 2;
  • FIG. 5 is similar to FIG. 4 but illustrates a retracted cam follower
  • FIG. 6 is a section through a yarn package, 91, showing the brake show in braking position
  • FIG. 7 is a similar cross-section of package 9J with the package raised by the brake show releasing cam
  • FIG. 8 is a diagrammatic illustration of a shaft and elements in FIGS. 6 and 7, the inner core of the yarn package being omitted for clarity;
  • FIG. 9 is a diagrammatic view of a variant for feeding elastic yarn in a weft knitting machine.
  • FIGS. 10 and 11 are sections along the lines 10-10 and 11-11 of FIGS.-9 to 11 show only a part of the machine.
  • FIG. 1 is a plan view modification made by the present invention. Being a plan view, the packages on the carousel are not all in one plane as the two weft carrier chains 1L and IR extend up at an angle from the plane of the carousel itself, these chains carry conventional clamping pins 2, which are opened on chain 1R as it is approached by the yarn, as will be described, and of course opened when the weft has been carried to the knitting line. The drawing does not extend this far and the knitting line is not shown as it is not changed by the present invention.
  • this modified carousel portion is built on a frame 7 provided with an endless carrier in the form of two chains, a wider chain 5 on which the yarn packages are carried and a narrower chain 8 on which the tensioning devices for each package are carried.
  • the packages which are numbered 9A to 9K, are horizontal; in other words in a modified carousel rather than the form in the original carousel patent mentioned above, in which the packages extend vertically.
  • the Jones machine can be operated with vertical packages but the present invention, while not inoperative with vertical packages, is much less convenient and the horizontal package modification illustrated in the drawings and here described constitutes a definitely preferred form.
  • the drive for the chains 1L and IR and for the chains 5 and 8 is taken from the main drive for the knitting machine, as diagrammatically indicated at 6.
  • the mechanical connections are not specifically illustrated as they would only confuse the drawings and are not changed by the present invention. Similarly, only the eleven packages which can be seen by looking down on the carousel are shown, but of course the chains 5 and 8 are endless.
  • Each package has its own tensioning device, labelled 10A to 10K, the lettering corresponding with the packages. Yarn from the packages is numbered 11A to 1 1K and runs from each package to its tensioning device.
  • the chains 5 and 8 move from right to left, as can be seen by the arrow around the shaft from the drive 6, and the chains 1L and IR move diagonally up. All the chains are, of course, endless and return, but in FIG. 1 the return is not shown.
  • Packages 9A and 9K are turning around an end sprocket, (not shown), of chain 5.
  • the mounting of the package on the chain includes a bracket 24 with a spindle 25 for each package. This spindle is not identical in design with the correspondingly numbered spindlein the Jones patent and, as can be seen in FIGS. 6 to 8, performs an additional function.
  • the spindle is in the center of the yarn package, which is fixed on it in normal manner.
  • the spindle 25 is eccentric in the large hollow center of the inner package core, which is numbered 28 in FIGS. 6 to 8. This construction does not show in the plan view of FIG. 1.
  • only one bracket 24 is shown at the right, and similarly only one bracket 26 for tensioning device 10A.
  • the brackets 24 show the spindle 25 but, again, in order to avoid confusing the drawing this reference numeral is not repeated for each package.
  • Package 98 has moved to a point so that the tail is opposite a clamp or pin on the chain 1R.
  • This pin has been temporarily opened by the well known cam, as is shown in FIG. 5 of the Carman patent. It is shown only diagrammatically in FIG. 1.
  • the pin which has received the tail 4 moves off its sprocket and clamps the yarn. Of course, this has occurred with the tails of the preceding packages 9C to 90.
  • yarns 12C to 120 are strung between the chains as the packages move.
  • the yarn does not unwind from the packages throughout the whole of their travel as it does in the Jones machine.
  • a cutter 13 cuts the yarn, leaving a tail, which can be seen as 4 in the yarn from the package 90, which is getting ready to turn around the sprocket of the chain 5. Since the yarn in FIG. 1 is elastic yarn, a separate track extends beyond the cutter 13 to the left of where the packages move past the carrier chain IL. This somewhat shorter section of cam opens the clamping discs.
  • a cam 14 is mounted on the frame 7 with an entrance ramp just beyond the tensioning device C and an exit ramp just beyond the tensioning device ION.
  • FIG. 1 is a plan view, the gentle slope of these two ramps does not show.
  • cam sections 30 under the packages. Their operation will be described in more detail below.
  • the length or lengths of the cams 30 can be varied, as has been mentioned, and it will be seen they are detachably mounted on the frame of the machine, being attachable at various points by bolts 33. These bolts fasten into a series of threaded holes in the frame but only two bolts are illustrated in FIG. 1 in order to avoid confusing the figure.
  • FIGS. 2 to 5 illustrate the intermittent tensioning devices of the Jones machine, which are present also in the present invention. They will first be described. It will be seen in FIG. 2 that the yarn enters through one grommet 19, passes around guiding rolls 23 and then between two discs 20. These discs are mounted on a bolt 21 and can move against the tension of the spring 22. This can best be seen in FIGS. 3, 4 and 5.
  • FIG. 2 represents the position occupied by tensioning discs 10D in FIG. 1 and also in the same position for tensioning devices 10E to 100.
  • a rod 15 can be seen to have been moved up by the cam 14. This rod moves in an extension 18 of the housing 10 against a spring 17 and is provided at its upper end with a wedge-shaped taper 16. The wedge shape can be seen more clearly in FIGS.
  • FIGS. 6 to 8 illustrate the new design of packages according to the present invention. This is quite different from the packages in the Jones patent, where the package holder is centrally located and does not rotate. On the contrary, as can be seen in FIGS. 6 and 7, the spindle 25 is eccentrically located. It is connected to an element 34 which turns on a shaft 29 on which a brake show 32 is mounted, which is best seen in FIG. 8. The element 34 is connected to the spindle 25 by a spring 31. When this spring is retracted, as can be seen in FIG. 6, it turns the shaft 29 and forces the brake shoe 32 into contact with the inside of the hollow core 28. This is the position shown in FIG. 6. In this position the package cannot turn, and so while in this position an elastic yarn is stretched. When the package moves on and climbs the ramp on the right hand cam 30, it is raised,
  • FIGS. 6 and 7 are to relative scale and represent the relative height of the package in both positions.
  • the yarn package can turn freely, and the stretched elastic yarn then pulls out additional yarn until the yarn is substantially relaxed.
  • the packages move off the exit ramp of the first cam section 30, which again applies the brake shoe 32, thus again locking the packages 9E and 9F against turning, and causes the elastic yarn to stretch again.
  • the entrance ramp 35 which is diagrammatically indicated in FIG. 5, again raised the package, releasing the brake shoe, and thereafter the yarn unwinds freely until the intermittent tensioning means 10I takes hold, whereupon it is pulled sufficiently taut so that it can be readily clamped by the pin 2 on chain IL.
  • cam 30 it would be possible to have only a single cam 30. However, for smoothness of operation it is better to have two or more cams, which prevent excessive sagging while the packages are moving along the cam profile and hence unlocked and free to rotate.
  • the number of sections of cam 30 can vary, and the present invention is not limited to there being a plurality and very definitely not limited to an exact number or length of cam section. However, as having a plurality of sections makes for smoother adjustment and operation, this is illustrated in FIG. 1. It will be noted as the packages climb the cams 30 they are raised somewhat against the tension of the springs 31. In FIGS.
  • FIGS. 9 to 11 illustrate the second variant, that is the application of the present invention to weft knitting.
  • the circular machine operates with movement of the yarn feeding devices in continuous motion in one direction whereas, of course, if the needles are in a straight line the movement of feeding must be an oscillatory one first in one direction and then in the other.
  • this variant of the invention is applicable either to single or double knit fabrics. In each case the knitting is by one or two yarns which are not elastic.
  • FIGS. 1 to 8 illustrate a yarn package with the large diameter core as in he first variant illustrated in FIGS. 1 to 8.
  • the yarn package is numbered 9, which is the same reference numeral given in the other variant as, of course, the package itself is the same.
  • the packages of elastic yarn have large central cores, which are also given the same reference numeral 28 as in the other figures.
  • FIG. 9 illustrates a stationary rim 52 on a circular knitting machine on which is mounted a chain 36 which is, therefore, stationary.
  • the package is moved around the periphery in synchronism with the motion of the knitting needles 51, which motion is not changed by the present invention, and therefore the needles are not shown in detail in order not to confuse the drawing.
  • This motion is effected by a drive from a pulley 53 turning in synchronism with the knitting machine drive, (not shown as it is not changed by the present invention).
  • the pulley drives a shaft 54 journaled in a fork on the stationary part 52.
  • At the other end of the shaft is a gear 55 which meshes with gear teeth on a movable rim 49 which turns around and inside the stationary rim portion 52.
  • FIG. 10 While the portions of the drive are shown in FIG. 10, the drive itself is best seen in FIGS. 9 and 11.
  • the movable element 49 is shown broken away. It extends across to the needles and drives a conventional cam which successively moves the needles up and down. This drive is not changed at all in the present invention and is therefore not shown in detail on FIGS. 9 and 11 in order not to confuce the drawings.
  • the mo-vable element 49 carries a spindle or shaft 37 on which there is a pair of rollers 38 which contact the inner surface of the package form 28. Within the hollow form there is a second shaft 39 carrying a pair of rollers 40.
  • the shaft 39 is connected to shaft 37 by two metal elements 41.
  • FIG. 10 shows the two shafts clearly but the view of FIG. 9 is a plan view at right angles to FIG. 10.
  • the shafts 37 and 39 are shown in section rather than in elevation as in FIG. 10. However, FIG. 9 permits showing that the shaft 39 extends in a fork or slot 42.
  • the shaft 39 is urged away from the shaft 37 by the spring 45.
  • a roller 43 is clamped to a spindle 44 by the set screws 46. This can be seen best in FIG. 10. Near the end of the spindle 44, which, as can be seen in FIG. 10, is journaled into the moving element 49, there is a gear 47 locked to the spindle with a set screw 48. This gear meshes with the stationary chain 36, as can best be seen in FIG. 9 since the chain does not show in FIG. 10.
  • the spindle 44, to which roller 43 is locked rotates as the gear 47 moves around the stationary chain 36. This also turns the roller 43, to which it is locked, and the roller in turn bears on the outside of the yarn package 9 causing the latter to rotate in a direction opposite to that of the spindle 44 and roller43.
  • the second package may be the same as the first package shown in FIGS. 9 and 10 and the elements which cause paying out of the elastic yarn, i.e. drive of a movable element with gear and stationary chain, are repeated. They are not shown in drawings as they would confuse the drawings unnecessarily.
  • the surface of the package 9 is in contact with the roller 43 and is rotated by it.
  • the spring 45 urges the shaft 39 away from the shaft 37, which is for the purpose of maintaining firm contact with the roller 43 as the thickness of yarn in the package changes when it is unwound.
  • the roller 43 carries a shoulder 50 on which the yarn package turns. This permits turning but does not permit the package to slide down so that it is held in contact with the roller 43 at a predetermined level.
  • the spring 45 maintains the surface of the yarn in contact with the roller 43.
  • the shaft 39 slides back in the slot 42 comprises the spring 45.
  • the rate at which yarn is unwound from the package 9 is determined by the number of teeth on the gear 47 and of course by the diameter of the roller 43. This pays out a constant length of elastic yarn.
  • the elastic weft laid under small tension which can be varied depending on the nature of the fabric desired. This is effected by the number of teeth on the gear 47 and diameter of roller 43.
  • FIG. 10 it is a very simple matter to mount gears of different diameters and teeth numbers to change the rate of paying out of the elastic yarn to produce the desired amount of tension.
  • the drive of the packages is very simple and quite positive and the mechanism for maintaining constant contact with the roller 43 is also very simple and very reliable. This makes for a very economical structure for feeding elastic yarn in a weft knitting machine.
  • an elastic weft thread feeding device for warp knitting machines comprising a first and second endless carrier with yarn clamping means thereon for opening and closing to clamp on weft thread, a third endless carrier provided with a plurality of yarn packages, each package having associated with it and moving therewith a tensioning means which, with elastic yarn, act as gripping means for the yarn, the endless carriers being synchronously driven and positioned so that as a package comes adjacent to the clamping means on the first carrier the means opens, clamps the yarn from the package, and then strings out the yarn as the package continues to move, the tensioning or gripping means being provided with means for applying pressure to the yarn intermittently to hold the yarn as it is grasped by the clamping means on the first carrier, maintaining gripping for a short distance beyond, the pressure then being released until the package approaches the clamping means on the second carrier and reactuated for a short distance as the package transfers its yarn to said clamping means on the second carrier, the yarn being tension free during the major portion of the travel of each package between carriers, the impovement which
  • a weft thread feeding device in which the yarn packages are carried on hollow cores of relatively large internal diameter, each package having within the hollow core a spindle attached to the third endless carrier and a second shaft connected to the spindle by spring means and carrying a brake show adapted, when the spindle is in its lowest position, to turn the shaft and apply the brake shoe to the inside of the hollow core, thereby locking the package against rotation, and means actuated by movement of the packages for raising the packages sufficiently to turn the shaft carrying the brake shoe to a point at which the brake shoe no longer contacts the core and hence the yarn is free to unwind, whereby when the packages carry elastic yarn it is first stretched by the locked packages as and after clamping to the first carrier, then raised to unlock the packge and permit yarn to unwind freely, whereby the yarn first unwinds to the point where it takes up the stretch and means adjacent the second endless carrier to again lock the package core from turning, the device being provided with a cutting means beyond the second endless carrier for sufficient distance to permit relaxation of the slightly stretched yarn to form
  • a device in which the carrier for the packages rotates in a vertical plane, the packages extend horizontally, and the means for raising lowering the packages are cam means attached to the knitting machine frame.
  • a device in which the intermittent tensioning or gripping means for the yarn are a pair of discs spring urged against each other and a rod pressure on the yarn.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
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US484650A 1974-07-01 1974-07-01 Thread feeding device for inserted weft knitting machines Expired - Lifetime US3911698A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US484650A US3911698A (en) 1974-07-01 1974-07-01 Thread feeding device for inserted weft knitting machines
AR259461A AR207987A1 (es) 1974-07-01 1975-01-01 Mejoras en dispositivos de alimentacion a maquinar de tejer
CH837375A CH594766A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-01 1975-06-27
DE752529126A DE2529126C3 (de) 1974-07-01 1975-06-30 Vorrichtung für die Zuführung von Schußfäden zu einer Kettenwirkmaschine
IT24929/75A IT1039546B (it) 1974-07-01 1975-06-30 Dispositivo di alimentazione del filo di trama elastico pemacchine per maglieria
IL47603A IL47603A (en) 1974-07-01 1975-06-30 Thread feeding device for inserted weft knitting machines
CA230,453A CA1028164A (en) 1974-07-01 1975-06-30 Elastic weft thread feeding device for warp knitting machines
JP50081364A JPS5123353A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-01 1975-07-01
GB27664/75A GB1519622A (en) 1974-07-01 1975-07-01 Warp knitting machine,incorporating weft thread feeding device
AT505875A AT341066B (de) 1974-07-01 1975-07-01 Schussfaden-zubringereinrichtung fur elastische schussfaden bei kettenwirkmaschinen
AU82608/75A AU494343B2 (en) 1974-07-01 1975-07-01 Thread feeding device for inserted weft knitting machines
BR5284/75D BR7504127A (pt) 1974-07-01 1975-07-01 Dispositivo de alimentacao de linha de trama elastica para maquinas de tricotagem de trama
FR7520670A FR2277167A1 (fr) 1974-07-01 1975-07-01 Dispositif d'alimentation de fils de trame pour metiers a tricoter
NL7507811A NL7507811A (nl) 1974-07-01 1975-07-01 Toevoerinrichting voor elastische inslagdraad voor een kettingbreimachine.

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US484650A US3911698A (en) 1974-07-01 1974-07-01 Thread feeding device for inserted weft knitting machines

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967469A (en) * 1974-07-29 1976-07-06 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with improved thread feeding apparatus
US4347718A (en) * 1979-10-03 1982-09-07 Hospal Medical Corporation Cutting elements for knitting machines
US4909049A (en) * 1983-03-16 1990-03-20 Bayer Aktiengesellschaft Bielastic, warp-knit fabric and its production
US5510142A (en) * 1994-09-02 1996-04-23 Lainiere De Picardie Process for manufacturing a composite base fabric intended for the reinforcement of a waistband and composite base fabric thus obtained
US5617743A (en) * 1994-08-29 1997-04-08 Rednour; Raymond J. Apparatus for knitting about a traveling strand
WO2001071075A3 (de) * 2000-03-20 2002-02-14 Iropa Ag Verfahren zum eintragen eines elastomer-fadens und fadenverarbeitungssystem
CN106245220A (zh) * 2016-06-02 2016-12-21 江南大学 一种多梳经编机花梳送经控制实现方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112813576B (zh) * 2021-03-19 2025-05-02 中山龙族自动化科技有限公司 一种适用于电脑横机的夹纱装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290628A (en) * 1942-07-21 Apparatus fob feeding elastic
US3303671A (en) * 1966-05-03 1967-02-14 Jr Thomas Anderson Oliver Yarn feeding means for knitting machines
US3364701A (en) * 1966-02-25 1968-01-23 Stevens & Co Inc J P Apparatus for feeding filling threads to a warp knitting machine
US3636731A (en) * 1970-08-04 1972-01-25 Robert F Jones Tension-relaxing device for feeding filling threads to a warp knitting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290628A (en) * 1942-07-21 Apparatus fob feeding elastic
US3364701A (en) * 1966-02-25 1968-01-23 Stevens & Co Inc J P Apparatus for feeding filling threads to a warp knitting machine
US3303671A (en) * 1966-05-03 1967-02-14 Jr Thomas Anderson Oliver Yarn feeding means for knitting machines
US3636731A (en) * 1970-08-04 1972-01-25 Robert F Jones Tension-relaxing device for feeding filling threads to a warp knitting machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967469A (en) * 1974-07-29 1976-07-06 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with improved thread feeding apparatus
US4347718A (en) * 1979-10-03 1982-09-07 Hospal Medical Corporation Cutting elements for knitting machines
US4909049A (en) * 1983-03-16 1990-03-20 Bayer Aktiengesellschaft Bielastic, warp-knit fabric and its production
US5617743A (en) * 1994-08-29 1997-04-08 Rednour; Raymond J. Apparatus for knitting about a traveling strand
US5510142A (en) * 1994-09-02 1996-04-23 Lainiere De Picardie Process for manufacturing a composite base fabric intended for the reinforcement of a waistband and composite base fabric thus obtained
WO2001071075A3 (de) * 2000-03-20 2002-02-14 Iropa Ag Verfahren zum eintragen eines elastomer-fadens und fadenverarbeitungssystem
US6752178B1 (en) 2000-03-20 2004-06-22 Iropa Ag Method for inserting an elastomeric yarn and yarn processing system
CN106245220A (zh) * 2016-06-02 2016-12-21 江南大学 一种多梳经编机花梳送经控制实现方法
CN106245220B (zh) * 2016-06-02 2017-11-07 江南大学 一种多梳经编机花梳送经控制实现方法

Also Published As

Publication number Publication date
FR2277167A1 (fr) 1976-01-30
NL7507811A (nl) 1976-01-05
CH594766A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-01-31
DE2529126C3 (de) 1979-03-01
DE2529126A1 (de) 1976-01-22
ATA505875A (de) 1977-05-15
DE2529126B2 (de) 1978-07-06
JPS5123353A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-02-24
IT1039546B (it) 1979-12-10
BR7504127A (pt) 1976-06-29
IL47603A (en) 1978-06-15
CA1028164A (en) 1978-03-21
FR2277167B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-08-24
GB1519622A (en) 1978-08-02
AR207987A1 (es) 1976-11-22
AU8260875A (en) 1977-01-06
AT341066B (de) 1978-01-25

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