US3521441A - Process and apparatus for reducing yarn waste in draw-twisters - Google Patents

Process and apparatus for reducing yarn waste in draw-twisters Download PDF

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Publication number
US3521441A
US3521441A US688757A US3521441DA US3521441A US 3521441 A US3521441 A US 3521441A US 688757 A US688757 A US 688757A US 3521441D A US3521441D A US 3521441DA US 3521441 A US3521441 A US 3521441A
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speed
period
yarn
delivery mechanism
during
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Hansruedi Lamparter
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
    • D01H1/305—Speed control of the spindles in response to the displacements of the ring rail
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/32—Driving or stopping arrangements for complete machines

Definitions

  • the speed of yarn delivery feed is varied with respect to the spindle speed in a manner to wind up smaller amounts of waste on the waste cones without impairing the quality of the yarn in the package.
  • the delivery speed is increased to the production rate at constant rates from rest or from a creep rate in staggered fashion at an inverse proportional rate with respect to the spindle speed so that the proportional ratio of such is higher during starting and stopping than during production.
  • This invention relates to a process and apparatus for reducing yarn waste in draw twisters. More particularly, this invention relates to a process and apparatus for reducing yarn waste during the starting and stopping phases of operation of a draw twister.
  • the invention provides a process for reducing the amount of waste in draW-twisters during the starting and stopping periods of the draw-twisters.
  • the process includes the feeding of a yarn to a rotating spindle during the starting period at a delivery speed which varies at a rate with respect to the spindle speed such that the rate decreases from a value which is below the critical value of the yarn twist (e.g. a critical value of about 700 turns per meter of yarn produced) and at a multiple of the production period rate to the production period rate.
  • the critical value of the yarn twist e.g. a critical value of about 700 turns per meter of yarn produced
  • the yarn delivery speed is brought from rest to a low speed and held constant. After a time delay, the yarn delivery speed is again increased at a constant rate up to the production speed.
  • the respective speeds of the yarn delivery and spindles are held to a ratio of spindle speed to delivery speed which varies at a rate which at first increases at a constant rate up to the time the delivery speed begins to increase to the production rate and then decreases at a constant rate until production of a package is started. During stopping of the machine, this ratio variation is followed in a reverse sequence. Also, the ratio of speeds during starting and stopping is maintained above the ratio of speeds existent during production of the yarn package but at all times below the critical speed ratio of the yarn.
  • the yarn delivery speed and spindle speeds are initially running at a low constant speed before the above described cycles are started and are run-down to such low speeds upon braking of the machine.
  • the delivery speed instead of being increased to a low constant speed at the start, is gradually increased at a low constant rate and then is rapidly increased at a high constant rate to the production speed. In all these embodiments the sequence of speeds of the delivery feed and spindles is followed in a reverse manner during the stopping of the machine.
  • the apparatus of the invention which is incorporated into a draw-twister having a delivery mechanism for feeding the yarn to a spindle and a drive mechanism for driving the spindle and delivery mechanism includes a means for driving the delivery mechanism at a reduced speed during portions of the starting and stopping periods.
  • This means for driving the delivery mechanism is activated at predetermined times, so that the rate of delivery speed can be varied with respect to the spindle speed to effect the waste reduction.
  • the delivery mechanism is driven by a separate drive from the spindles.
  • an auxiliary drive is provided to drive the delivery mechanism at reduced speeds during the initial phase of the starting periods and during the later phase of the stopping periods.
  • various drives are provided to run the delivery mechanism at various selected constant speed levels while the spindles are driven by separate drives or by the same drive through independent gearing.
  • suitable switching controls are used to activate the respective drives to drive the delivery mechanism and spindles at the required speeds according to the various process embodiments of the invention.
  • the creep time during which the yarn is initially drawn in can be substantially lengthened until the given take-up capacity for the Waste is exhausted.
  • This allows a longer time period for drawing-in of the yarn and, thus, the threading or drawing-in of the yarn on the spindles of the twister can be effected by less personnel.
  • the drawing-in of the yarn is not accomplished during a slow intermediate period,
  • the amount of waste wound up, for example, on a waste cone, adjacent the yarn package can be kept low. This provides a greater take-up capacity on the waste cone for the next yarn package which capacity is sufficient to permit production of several yarn packages without any need for removal of the accumulated waste between successive produced packages.
  • FIG. 1 schematically illustrates a conventional drawtwister
  • FIGS. 2a to 2d graphically illustrate the chronological sequence of the delivery speed, spindle speed, ratio of spindle speed to delivery speed, and amount of waste generated per unit of time during the starting and stopping periods of conventional draw-twisters;
  • FIGS. 3a to 3d graphically illustrate the same chronological seouence as in FIGS. 2a to 2d of a conventional draw-twister using a delivery mechanism actuated independently of the spindle;
  • FIGS. 4a to 4d graphically illustrate the same chronological sequence as in FIGS. 2a to 2d of a draw-twister utilizing the process of the invention
  • FIGS. 5a to 5d graphically illustrate the same chronological sequence as in FIGS. 4a to 4d of the draw-twister operated with an intermediate period in which the drawtwister runs at a reduced constant speed according to the invention
  • FIGS. 6a to 6d graphically illustrate the same chronological sequence as in FIGS. 4a to 4d of a draw-twister having a delivery speed proportional to the spindle speed during starting and stopping according to the invention
  • FIGS. 7a to 7d graphically illustrate the same chronological sequence as in FIGS. 5a to 5d of the draw-twister operating with an intermediate period of reduced constant speeds and with starting and stopping periods wherein the delivery speed is proportional to the spindle speed;
  • FIG. 8 schematically illustrates a draw-twister having an apparatus of the invention
  • FIGS. 8a and 8] illustrate respective modifications of the apparatus of the invention
  • FIGS. 9 to 13 schematically illustrate other modifications of the apparatus of the invention.
  • FIG. 14 illustrates a comprehensive circuit diagram for actuation of various switches in the various embodiments of the invention.
  • FIG. 1 a yarn 1 in the form of an undrawn endless filament or a strand of continuous filaments is drawn off a package 2 by means of feed rollers 3 and fed to a drawing area formed by drawing rollers 4 which run at a greater speed than the feed rollers 3.
  • the feed rollers 3 and drawing rollers 4 are driven at a fixed ratio with respect to each other and together constitute a delivery mechanism 5.
  • a motor 6 drives both the feed rollers 3 and drawing rollers 4 through a gear box 7.
  • the yarn 1 is transmitted by the drawing rollers 4 at a delivery speed V via a yarn guide 8 to a traveller 9 of a vertically reciprocal ring 10 disposed about a spindle 11.
  • the yarn 1 is then wound onto a bobbin 12 mounted on the spindle 11 or onto a waste cone 13 situated beneath the bobbin.
  • the spindles 11 are driven by a drive pulley 14 via a belt 15, the drive pulley 14 being secured on a spindle drive shaft 16 which runs longitudinally of the machine and which is driven by the motor 6 through connection with the gear box 7.
  • the waste yarn is first wound onto the waste cone 13 on the spindle 11 and, in stopping or running-out of the draw-twister, is wound either onto an upper collar 19 on the bobbin which is separated from the yarn package or again onto the waste cone 13.
  • the amount of waste, Ab illustrated as the shaded area in FIG. 2d, can be reduced only if the production period P could be extended to the maximum possible, for instance, to P
  • certain deviations from normal process conditions would have to be accepted. While such deviations in some cases, such as the cold-drawing of nylon, could possibly be accept able; such deviations would not be admissible under normal conditions, for instance in the case of heat-drawn filaments.
  • the traveller 9 rotated and the threadedthrough yarn 1 is, as a result of the absence of delivery, twisted only, this duration D must be short enough so that the resultant twist in the section of the yarn FS between the drawing roller 4 and the traveller 9 will not exceed the critical ratio above which the normal course of the yarn and the drawing roller 4 would be disturbed.
  • the delay in the start of the delivery is thereby greatly limited and the amount of waste resulting during starting can thereby only be reduced to a limited extent unless an extension of the production phase to P is also accepted as admissible.
  • the acceleration period A of the spindles candue to the higher inertia of the spindles and their drive mechanism, and especially if a variable, not over-dimensioned drive motor is used for the spindle drive-on account of the mentioned critical ratio, exceed the acceleration period A of the delivery mechanism by the period D only.
  • the time lag D cannot be extended at will but the time A must also be increased. In other words, if A is increased to A then, necessarily, A must also be extended to A However, in that case, until the onset of the production period P there again a greater amount of waste is generated if an extension of the production period P to P is unacceptable.
  • the shortest possible braking period B (FIG. 3b) of the spindles 11 is also obtained in the case of a separate drive of the delivery mechanism and the spindle by the maximum braking couple transmittable via the drive belts, and since, in theory, the delivery mechanism must after the braking period B (FIG. 20:) come to a stop simultneously with the spindles or, if necessary, practically only after a very brief and negligible delay prior to the stoppage of the spindles, it is also not possible to reduce the amount of waste occurring during the stopping period when an extension of the production period to P is unacceptable.
  • the delivery mechanism is accelerated substantially proportionally to the spindles in such a way that the ratio n /V of the speed of the spindles with respect to the delivery speed reaches a higher value than the one achieved during the production period P and remains constant for a short period until t (FIG. 40).
  • the delivery speed V is held constant at a low value until t (FIG.
  • the critical ratio K has a value corresponding with a yarn produced at 700 turns per meter.
  • the acceleration from the intermediate period Cr or Cr to the production period P and the braking from the latter one to the period Cr or Cr occurs, as in the case in accordance with FIG. 4, with respect to the delivery speed V after the interval t or before the interval t and, with respect to the spindle speed 11 after t or prior to 2 (FIGS. 5a, b).
  • the process of the invention can be varied in that the delivery mechanism in a first partial phase from t to t of the starting period A is accelerated out of its stopped condition .(FIG. 6a) or out of a lower constant delivery speed (creep rate) (FIG. 7) of an intermediary period Cr in proportion to the spindles in such a Way that the ratio 11 V is constant and at a multiple above the ratio n,/ V;, of the production period P (FIGS. 60 and 70, respectively) and below the critical ratio of K.
  • an acceleration as described above, occurs to production speed.
  • the braking following the production period P likewise occurs as described above, whereby the speed of the delivery mechanism V in the first phase (1 to i of the stopping period B is quickly lowered, and in the second phase (t to i is lowered proportionally to the spindle speed in such a way that the ratio n /V is kept constant at a multiple of the ratio during the production period P.
  • This speed reduction is continued until t (FIG. 6a), that is, until stoppage of the delivery mechanism and the spindles or (FIG. 7a) until the beginning of an intermediate period Cr at the moment of i during which the machine is operated at reduced speed.
  • a draw-twister equipped for the execution of the process described according to FIGS. 4 and '6 has a drive motor 21 for a delivery mechanism 22 and a drive motor 23 for spindles 24.
  • the machine has an additional auxiliary motor 25 which actuates a feed roller 28 via an electrically driven clutch 27.
  • the drive motor 23 is started at 1 by closing of the switch C During the first part of the starting period A in other words during the period t to t (FIGS. 4a, b) or t to t (FIG. 6a), the clutch 27 is engaged through the closing of the switch C and the auxiliary motor 25 drives the delivery mechanism 22 comprising the feed roller 28 and the delivery mechanism gear 29 including the drive for the drawing rollers 30.
  • the delivery mechanism motor 21 which is disconnected through the opening of the switch C runs along in idle condition (see also FIG. 14).
  • the delivery mechanism motor 21 is connected by the closing of the switch C the auxiliary drive 25, 26, 27 is disengaged or overrun by the opening of the switch C and the delivery mechanism is rapidly accelerated to full operating speed for the production period whereby the ratio n /V of the spindle speed to the delivery speed drops to the value desired for the product.
  • the yarn 1 is wound onto the bobbin 12' at the beginning of the production period P and the package is built up in customary fashion.
  • the spindle drive motor 23 is disconnected by opening of the switch C at the moment (FIG. 4a) and t (FIG. 6a) and the spindles are braked by means of a known braking device (not shown).
  • the delivery mechanism motor 21 is disconnected by the opening of the switch C and the delivery mechanism 22, through the effect of the yarn drawing forces or additionally after closing of the switch C and engaging of the clutch 27 by the gear 26, is braked in such a way that the lower speed of the auxiliary drive is reached.
  • the delivery mechanism 22 continues to be actuated at this speed by the auxiliary drive 25, 26, 27 (FIG. 4ad) or is further slowed down proportionally to the speed of the spindle (FIGS. 6a-d) in such a way that the ratio n /V will always amount to a multiple of the ratio during the production period P.
  • the auxiliary motor 25 is constructed as a standard asynchronous motor and the gear 26 as a reduction gear, the reduction ratio of which can be adjusted through change gears.
  • the auxiliary drive is provided with a variable speed motor 31 (FIG. 8a), preferably a direct-current motor, and a gear 32 with a fixed reduction ratio.
  • asynchronous motor 33 connected to a gear 34 (FIG. 8b) that is infinitely variable during operation can be used.
  • the clutches 27 can be designed as overriding clutches or as controlled, preferably electromagnetically, engageable and disengageable clutches or even as controlled slip clutches.
  • FIG. 9 another device for the execution of the process according to FIGS. 4 to 6 has a delivery mechanism drive motor 35 which is operated as a twospeed pole-reversible motor by means of switches C and C In its lower speed (switch C the drive motor 35 drives as an auxiliany drive the delivery mechanism via a gear 36 designed as a change gear for the mode of operation illustrated in FIGS. 4 and 5.
  • the gear 36 is designed so that its speed is infinitely variable during operation.
  • the motor 35 is changed over to the higher speed (switch C closed, C open) so as to accelerate the delivery mechanism 37 as a main drive until the onset of the production period P.
  • the drive of the spindles is effected in the same manner as with the devices illustrated in FIG. 8 and is not further described.
  • the spindle drive motor 38 is disconnected by opening of the switch C and the spindles are braked.
  • the delivery speed V is reduced in such a Way to the lower speed by a change in the motor 35 (C closed, C open) that the 11 V ratio increases to a multiple of the ratio during the production period.
  • the gear 36 is designed as an infinitely variable reduction gear .(FIG. 6)
  • the delivery speed is proportionally reduced according to FIG. 6a so that the ratio n V remains constant until the stoppage of the machine.
  • an asynchronous main drive motor 39 is used to actuate the ring twister via a reduction gear 4% ⁇ which serves for the adjustment of the machine speed.
  • the spindles 41 are driven directly from the reduction gear via drive belts 42 and a shaft 43, whereas the drive 44 of the delivery mechanism is engaged or disengaged during operation through a clutch 45 by means of switch C
  • an auxiliary drive delivery mechanism comprising an auxiliary motor 46, gear 47 and clutch 48 is designed identically to the arrangement illustrated in FIG. 8 for driving the delivery mechanism and therefore is not further described.
  • the delivery mechanism In operation, during the first part of the starting period A, the delivery mechanism is disengaged from the main drive motor 39 by opening of clutch 45 (switch C open) and is driven at a constant reduced speed by the auxiliary drive 46, 47, 43 (switch C closed) according to FIG. 4a, or proportionally to the increasing spindle speed according to FIG. 6a.
  • the clutch 45 is engaged (switch C closed) and the delivery mechanism is rapidly brought to full operating speed through the drive 44 while the auxiliary drive 46, 47, 48 is overrun or disengaged by means of the clutch 48.
  • the main motor 39 is disconnected (switch C open) and the spindles 41 are braked.
  • the clutch 45 is disengaged (switch C open) whereupon the delivery mechanism is slowed down to such an extent by the yarn draft forces that its actuation is taken over by the auxiliary motor 46 in the manner described above.
  • the drive can also be laid out without an auxiliary motor to run the delivery mechanism and the spindles according to the programs shown in FIGS. 5 and 7.
  • a motor 49 which is polereversible, for example, by means of switches C and C drives the spindles via the gear 50 at its lower speed (switch C closed) at the reduced spindle speed during the creep rate intermediate period Cr (corresponding to FIGS. 5 and 7) between two production periods.
  • the motor 49 drives the spindles at full operating speed.
  • the auxiliary drive of the delivery mechanism 51 is provided by a gear 50 through a slip clutch 53 which is controlled by a slip control 52 which reduces the delivery speed during the first part of the starting period A (FIGS.
  • the delivery speed V is lowered by controlled opening of the clutch 53 (C open, C closed) through the slip control 52 as well as a brake 54 such as an electromagnetic brake, which is applied against the delivery mechanism so that the n /V ratio rises as desired in accordance with FIGS. 40 to 70.
  • the execution of the above process can also be carried out exclusively through electric handling of the speed control by means of one controlled D-C motor for actuation of both, the delivery mechainsm and the spindle drive, as well as for the operation in the intermediate creep rate period Cr.
  • an adjustable D-C motor 55 is used to drive the delivery mechanism 56 via a rigid transmission gear 57.
  • the motor 55 is provided with a control 58 and an electric speed indicator 59.
  • the spindles are driven by means of an adjustable D-C motor 60 which is provided with a control 61 and an electric speed indicator 62 similar to the one mentioned above.
  • the control voltages of the two controls 58 and 61 are tapped off by setting means 63 and 64 through switches C C C and C
  • the setting means 63, 64 also include the circuit required for the program according to FIG. (dash-and-dot lines).
  • the respective positions of the switches C C C and C are programmed as shown in the circuit program of FIG. 14.
  • the switches are, for, simplicitys sake, provided on all figures with identical reference numbers.
  • two adjustable D-C drives which are independent of one another are provided in the drawtwister for the execution of the program shown in FIGS. 6 and 7.
  • These drives include D-C motors 65 and 66 for the delivery mechanism 67 as well as for the spindle drive 68 which are each provided with an electric speed indicator 69, 70 and a control element 71, 72 as well as a setting device 73, 74 for transmitting the control voltage of the control element.
  • the voltage of the electric speed indicator 69 influences not only the control element 71 proper to the spindle drive 68, as in FIG. 12, but also serves as an output value for the setting means 74 controlling the delivery mechanism control element 72.
  • the connections in solid lines are provided for the programs as set forth in FIG. 6 and the dash-and-dot lines for the program as illustrated in FIG. 7.
  • the circuit program of the switches C C C C that is, their closing times, is again evident from the diagrams shown in FIG. 14 and does not require any further explanation.
  • the invention provides a process and apparatus for a draw-twister which, for example, in normal operation, that is, in the production period P, has a n- /V value corresponding to -15 turns per meter in the yarn. While this value is required in order to achieve a sufficient yarn tension in the building up of a package, a ratio of n V equal to about 20 to 30 turns per meter or, in other words, a multiple of the normal operation ratio, can be used in the main period of the starting or stopping periods, whereas these values are considered as the upper limit for normal operation.
  • the critical ratio K corresponding to a yarn manufactured at 700 turns per meter must not be exceeded so that, in accordance with the invention, the draw-twister can operate during a major part of the starting and stopping period in the range between 20 to 30 turns per meter and the critical ratio K.
  • the relationships n /V are between 100 and 200 turns per meter.
  • a process for reducing yarn waste in a draw-twister having a spindle for winding of a yarn into a package and a delivery mechanism for feeding the yarn to the spindle comprising the steps of rotating the spindle during a starting period at a constant rate of acceleration to a production speed for winding of the package during a subsequent production period, and of driving the delivery mechanism during said starting period at an increasing rate of speed to a production speed to produce a ratio of spindle speed to delivery mechanism speed which decreases from a first value below a predetermined critical value corresponding to a twist maximum in the yarn causing irregularities in the yarn path to a second value equal to the value of said ratio during said production period.
  • a process as set forth in claim 1 which further comprises the steps of rotating the spindle during a stopping period subsequent to said production period at a constant rate of deceleration from the production speed, and driving the delivery mechanism during said stopping period at a decreasing rate of speed from the production speed to increase said ratio from said second value while remaining below said critical value during said stopping period.
  • a process as set forth in claim 1 which further comprises the steps of rotating the spindle during a stopping period subsequent to said production period at a constant rate of deceleration from the production speed, and driving the delivery mechanism during said stopping period at an initial deceleration rate from the production speed to increase said ratio from said second value and thereafter at a lower deceleration rate to produce a constant ratio of spindle speed to delivery mechanism speed.
  • a process as set forth in claim 8 wherein said constant ratio is of a value slightly below the critical value corresponding to a yarn twist of 700 turns per meter.
  • a process as set forth in claim 8 which further comprises the step of maintaining the spindle speed and delivery mechanism speed at said constant ratio after said stopping period during an intermediate period until a subsequent starting period is initiated.
  • an apparatus comprising first means for driving said spindle, second means for driving said delivery mechanism at a first speed, an auxiliary means for driving said delivery mechanism at a reduced speed from said first speed, and means for separately actuating said second means and said auxiliary means whereby the delivery mechanism is driven at reduced rates after starting and before acceleration to production speed and after deceleration from production speed and before stopping.
  • auxiliary means includes a drive motor, a gear operatively connected to said drive motor and a clutch operatively connected between said gear and said delivery mechanism.
  • auxiliary means further includes a controllable clutch for braking said second means.
  • said second means includes a motor for driving said delivery mechanism, a control element for controlling the drive of said motor and a value setting device for regulating said control element.
  • said first means includes a motor for driving said spindle and an electric speed indicator operatively connected to said motor for responding to the speed of said motor and operatively connected to said value setting device for controlling said value setting device.
  • an apparatus comprising a spindle drive for driving said spindle, means for selectively driving said delivery mechanism between a production speed and a reduced speed from said production speed, said means including a drive motor operable at at least two speeds corresponding to said production speed and said reducing speed and a switch means connected to said drive motor for actuating said drive motor to operate selectively at one of said two speeds whereby the delivery mechanism is driven at a reduced speed after starting and before ac celeration to production speed and after deceleration from production speed and before stopping.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US688757A 1967-06-05 1967-12-07 Process and apparatus for reducing yarn waste in draw-twisters Expired - Lifetime US3521441A (en)

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Application Number Priority Date Filing Date Title
CH799967A CH466765A (de) 1967-06-05 1967-06-05 Verfahren zur Verminderung der Abgangmenge während der An- und/oder Auslaufphase einer Streckzwirnmaschine und Vorrichtung zur Durchführung des Verfahrens

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US (1) US3521441A (nl)
BE (1) BE715789A (nl)
CH (1) CH466765A (nl)
DE (2) DE1984520U (nl)
FR (1) FR1559463A (nl)
GB (1) GB1236458A (nl)
NL (1) NL156762B (nl)

Cited By (9)

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Publication number Priority date Publication date Assignee Title
US3638414A (en) * 1969-11-07 1972-02-01 Fiber Industries Inc Programmed spindle speed
US3738095A (en) * 1970-11-23 1973-06-12 Barmag Barmer Maschf Textile machines with uniform deceleration of its drive motors
JPS4896816A (nl) * 1972-02-17 1973-12-11
US3908347A (en) * 1973-02-20 1975-09-30 Heberlein Hispano Sa Process and apparatus for the control of spinning machines
US4103210A (en) * 1972-10-21 1978-07-25 Zinser-Textilmaschinen Gmbh Draw twisting machine
US4359858A (en) * 1979-07-07 1982-11-23 Zinser Textilmaschinen Gmbh Method of and apparatus for winding a filament onto a bobbin
US5551223A (en) * 1994-01-28 1996-09-03 Zinser Textilmaschinen Gmbh Process and apparatus for optimizing spin geometry of a ring spinning machine
US6009698A (en) * 1997-03-13 2000-01-04 Zinser Textilmaschinen Gmbh Method of operating a ring-spinning machine with vertically shiftable thread-guide eyes
US20190145024A1 (en) * 2017-11-10 2019-05-16 Maschinenfabrik Rieter Ag Ring Spinning Machine with Displaceably Supported Spindle Rail

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528412B1 (nl) * 1969-05-02 1977-03-09
JPS5940927B2 (ja) * 1980-05-16 1984-10-03 株式会社豊田自動織機製作所 粗紡機における起動方法
FR2789409B1 (fr) * 1999-02-05 2001-03-09 Icbt Yarn Machine de retordage de fils, verre notamment

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US2667030A (en) * 1952-03-03 1954-01-26 Stevens & Co Inc J P Twist control means for yarn winding machines
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery
US3137987A (en) * 1962-07-18 1964-06-23 Monsanto Co Method and apparatus for drawtwisting yarn
US3316699A (en) * 1963-10-16 1967-05-02 Klinger Mfg Co Ltd Apparatus for twisting yarn
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments

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Publication number Priority date Publication date Assignee Title
US2667030A (en) * 1952-03-03 1954-01-26 Stevens & Co Inc J P Twist control means for yarn winding machines
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery
US3137987A (en) * 1962-07-18 1964-06-23 Monsanto Co Method and apparatus for drawtwisting yarn
US3316699A (en) * 1963-10-16 1967-05-02 Klinger Mfg Co Ltd Apparatus for twisting yarn
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638414A (en) * 1969-11-07 1972-02-01 Fiber Industries Inc Programmed spindle speed
US3738095A (en) * 1970-11-23 1973-06-12 Barmag Barmer Maschf Textile machines with uniform deceleration of its drive motors
JPS4896816A (nl) * 1972-02-17 1973-12-11
JPS537968B2 (nl) * 1972-02-17 1978-03-24
US4103210A (en) * 1972-10-21 1978-07-25 Zinser-Textilmaschinen Gmbh Draw twisting machine
US3908347A (en) * 1973-02-20 1975-09-30 Heberlein Hispano Sa Process and apparatus for the control of spinning machines
US4359858A (en) * 1979-07-07 1982-11-23 Zinser Textilmaschinen Gmbh Method of and apparatus for winding a filament onto a bobbin
US5551223A (en) * 1994-01-28 1996-09-03 Zinser Textilmaschinen Gmbh Process and apparatus for optimizing spin geometry of a ring spinning machine
US6009698A (en) * 1997-03-13 2000-01-04 Zinser Textilmaschinen Gmbh Method of operating a ring-spinning machine with vertically shiftable thread-guide eyes
US20190145024A1 (en) * 2017-11-10 2019-05-16 Maschinenfabrik Rieter Ag Ring Spinning Machine with Displaceably Supported Spindle Rail
US10968542B2 (en) * 2017-11-10 2021-04-06 Maschinenfabrik Rieter Ag Ring spinning machine with displaceably supported spindle rail

Also Published As

Publication number Publication date
NL6804666A (nl) 1968-12-06
FR1559463A (nl) 1969-03-07
DE1685915B2 (nl) 1974-10-24
NL156762B (nl) 1978-05-16
DE1984520U (de) 1968-04-25
DE1685915A1 (de) 1972-04-13
GB1236458A (en) 1971-06-23
BE715789A (nl) 1968-10-16
CH466765A (de) 1968-12-15

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