EP4116476A1 - Dispositif d'alimentation positive de fil motorisé à mode de fonctionnement sélectionnable et appareil d'alimentation en fil l'utilisant - Google Patents

Dispositif d'alimentation positive de fil motorisé à mode de fonctionnement sélectionnable et appareil d'alimentation en fil l'utilisant Download PDF

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Publication number
EP4116476A1
EP4116476A1 EP22183487.2A EP22183487A EP4116476A1 EP 4116476 A1 EP4116476 A1 EP 4116476A1 EP 22183487 A EP22183487 A EP 22183487A EP 4116476 A1 EP4116476 A1 EP 4116476A1
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EP
European Patent Office
Prior art keywords
tension
yarn
textile machine
control unit
control mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22183487.2A
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German (de)
English (en)
Other versions
EP4116476B1 (fr
Inventor
Mirko Ruggeri
Giovanni Pedrini
Pietro Zenoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LGL Electronics SpA
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LGL Electronics SpA
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Publication of EP4116476A1 publication Critical patent/EP4116476A1/fr
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Publication of EP4116476B1 publication Critical patent/EP4116476B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/387—Regulating unwinding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/388—Regulating forwarding speed
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a motorized positive yarn feeder with selectable operating mode, and a yarn feeding apparatus that uses it.
  • This type of feeder is provided with a motorized reel, on which the yarn is wound repeatedly (e.g., 3 or 4 windings) so as to adhere to it by friction.
  • the yarn is wound repeatedly (e.g., 3 or 4 windings) so as to adhere to it by friction.
  • the reel is rotated, the yarn is unwound from a spool upstream and is fed to a textile machine downstream.
  • Feeders are known which operate according to an operating mode known as "under controlled tension".
  • a feeder of this type is described, e.g., in EP1710334B1 .
  • the yarn tension is monitored continuously by a tension sensor, which can be integrated in the feeder itself.
  • a control unit which is also optionally integrated in the feeder, modulates the speed of the reel on the basis of the signal received from the tension sensor, so as to stabilize the tension of the yarn fed to the textile machine at a fixed value or at a profile set by the user, to the advantage of the quality of the garment.
  • the controlled tension operating mode is usually preferred for knits that contain designs or patterns (Jacquard knits) because, owing to the design, the amount of yarn picked up by the textile machine varies in a manner that is difficult to predict during the production of the garment.
  • feeders that operate under controlled tension are not capable of ensuring that the textile machine is fed the correct amount of yarn.
  • the tension although controlled proximately to the point where the yarn leaves the feeder, can vary before the yarn reaches the textile machine, owing to the friction between the yarn and the various yarn guide rings that are located along the path, the effects of friction naturally not being subject to control.
  • feeders In order to control the amount of yarn supplied, feeders are also known which operate according to a mode known as "under controlled speed". A feeder of this type is described, e.g., in EP1491673A1 .
  • the feeder is set to control the feeding speed of the yarn so as to stabilize it at a fixed value or at a profile set by the user.
  • the controlled speed operating mode is usually preferred for smooth knits, meaning, without designs or patterns (Jersey knits), since the adjustment of the rotation speed of the reels as a function of the rotation speed of the textile machine makes it possible to obtain garments that are uniform and free from "banding".
  • Jersey knits are often executed using positive feeders with mechanical actuation, in which the rotation of the reel is imparted directly by the textile machine through a belt transmission system which is designed for a preset transmission ratio.
  • This system ensures that the length of yarn provided by the feeder always corresponds exactly to the length required by the textile machine, so as to improve the quality of the garment in terms of uniformity. This is normally called operation "in mechanical axial alignment”.
  • belt feeders are not capable of operating in controlled tension mode, and operation in mechanical axial alignment, although satisfactory in terms of quality of production, still has major limitations in terms of versatility and adjustment possibilities (e.g., in order to vary the transmission ratio it is necessary to replace the pulleys of the belt transmission system with others of different diameter) and also of flexibility and simplicity of setting up the line.
  • Feeders are likewise known, e.g., from US3858416 , EP2067886B1 , EP2572023B1 and EP2809838B1 , that are capable of operating both in controlled tension mode and in controlled speed mode, which can use different logics to switch from one mode to the other.
  • the aim of the present invention is to provide a motorized positive yarn feeder in which the most suitable operating mode is selected as a function of the type of knitting, with a more precise and reliable response than the known solutions in terms of length of yarn provided with respect to the length of yarn required by the textile machine.
  • an object of the invention is to provide a yarn feeding apparatus that uses yarn feeders according to the invention.
  • a yarn feeding apparatus comprises a series of motorized positive yarn feeders 10 that feed respective yarns Y to a generic textile machine TM.
  • Each one of the feeders 10 comprises a motorized reel 12 on which the yarn Y is wound repeatedly (e.g., 3 or 4 windings) so as to adhere to the reel by friction.
  • the yarn Y is unwound from a spool S upstream and is fed to the textile machine TM downstream.
  • the feeder 10 is provided with a control unit CU which is connected in order to receive a position signal of the reel 12 from position measurement means 16 and a tension signal of the yarn exiting from the feeder 10 from a tension sensor 20, which can be advantageously incorporated in the feeder 10.
  • control unit CU is programmed to operate selectively in a position control operating mode, in which it receives a position signal ⁇ TM from the textile machine TM, and, on the basis of the signal received from the position measurement means 16, it controls the position of the reel 12 in a closed loop according to a transmission ratio that can be set electronically with respect to the position of the textile machine TM, or in a tension control operating mode, in which it controls the speed of the reel 12 in a closed loop on the basis of the signal received from the tension sensor 20, so as to stabilize the tension of the yarn Y at a reference tension value or at a tension profile that can be set by the user.
  • a position control operating mode in which it receives a position signal ⁇ TM from the textile machine TM, and, on the basis of the signal received from the position measurement means 16, it controls the position of the reel 12 in a closed loop according to a transmission ratio that can be set electronically with respect to the position of the textile machine TM, or in a tension control operating mode, in which it controls the speed of the reel 12 in
  • the textile machine TM is provided with an encoder E for generating the position signal of the textile machine ⁇ TM via a communication controller TMC.
  • This last item converts the signal generated by the encoder E into a signal suitable for transmission on a communication line, in this embodiment a serial communication line L, to which all the feeders 10 are connected.
  • the signals generated by the position measurement means 16 and by the tension sensors 20 of the various feeders 10 can be advantageously monitored by the operator using a central control system (not shown) which is connected to the serial communication line L.
  • the position signal ⁇ TM is multiplied in a multiplier block RB according to a transmission ratio (typically less than 1, e.g., 1/100 according to the geometric characteristics of the machine and of the feeder) which is configurable by the user U, so as to generate a multiplied position signal of the textile machine ⁇ TMR.
  • a transmission ratio typically less than 1, e.g., 1/100 according to the geometric characteristics of the machine and of the feeder
  • the position measurement means 16 can comprise an additional encoder EF, or a set of Hall sensors or other systems capable of generating signals as a consequence of the rotation of the reel.
  • the control unit CU comprises a position conversion block POS which converts the signal of the second encoder EF into a reel position signal ⁇ R, and a speed conversion block VEL which converts the signal of the second encoder EF into a reel speed signal ⁇ R.
  • the multiplied position signal of the textile machine ⁇ TMP and the reel position signal ⁇ R are compared in a first subtracter node NP of a position control loop PL in order to generate a position error ⁇ E.
  • the position error ⁇ E is converted into a speed reference ⁇ by means of a first proportional-integrative controller PI1.
  • the speed reference ⁇ and the reel speed signal ⁇ R are compared in a second subtracter node NV of a speed control loop VL in order to generate a speed error ⁇ E.
  • the speed error ⁇ E is converted into a current reference I by means of a second proportional-integrative controller PI2.
  • the reel 12 is actuated by an electric three-phase motor M.
  • the three current signals that power the motor M are converted into an equivalent current signal IR by quadrature by means of a current conversion block CUR.
  • the current reference I and the equivalent current signal IR are compared in a third subtracter block NI of a current control loop IL, so as to generate a current error IE.
  • the current error IE is converted into a voltage reference V by means of a third proportional-integrative block PI3.
  • the voltage reference V is sent to adjustment and actuation means which, in this embodiment, comprise a pulse width modulator PWM which controls the electric voltage supplied to the motor M by means of a MOSFET bridge.
  • adjustment and actuation means which, in this embodiment, comprise a pulse width modulator PWM which controls the electric voltage supplied to the motor M by means of a MOSFET bridge.
  • the transmission ratio can be entered directly by the user or calculated by the control unit CU, on the basis of geometric considerations, in a calculation block CR as a function of the length of yarn that the user U wishes to be inserted at each machine turn.
  • the feeder always provides exactly the amount of yarn that is taken in by the textile machine, as if the feeder and the textile machine were connected by a mechanical transmission (controlled in mechanical axial alignment). This makes it possible to prevent the compounding of error that is found in traditional systems in which, in order to control the amount of yarn fed, the speed of the reel is controlled.
  • the system switches between the two operating modes (position control and tension control) on command by the user.
  • the control unit CU can be provided with a user interface (not shown) for making the selection.
  • control unit CU can be programmed to switch automatically between position control and tension control, and vice versa, when predetermined conditions correlated to the measurement of the tension occur.
  • Figure 4 shows the progression of tension over time during a Jersey knit operation, in which the feeder 10 operates in position control mode.
  • the control unit CU continues to monitor the instantaneous voltage with a relatively high band, e.g., comprised between 500Hz and 1000Hz.
  • a first criterion can cause the system to start in position control mode (block 110) and continue to monitor the tension (block 112). If, in block 114, the system begins detecting a series of periodic tension peaks, as illustrated in Figure 5 , highlighting an irregular pickup of yarn by the textile machine (e.g., during the knitting of a pattern), the control unit CU automatically switches to tension control mode (block 116), which will act to reduce the positive and negative tension peaks, as illustrated in Figure 6 .
  • the yarn tension continues to be monitored in the block 118.
  • control unit CU switches to the position control mode again.
  • a minimum threshold and a maximum threshold of the average tension measured are set.
  • the system starts in position control mode (block 210) and continues to monitor the tension (block 212). If the system, in block 214, detects that the average tension has gone outside the threshold interval, the control unit CU automatically switches to tension control mode (block 216) in order to return the average tension to within the preset threshold interval.
  • the yarn tension continues to be monitored in the block 218.
  • control unit CU checks to see if a preset limit (e.g., a time limit or a preset number of attempts) has expired.
  • a preset limit e.g., a time limit or a preset number of attempts
  • control unit continues to operate in tension control mode.
  • control unit CU can generate an alarm (block 224) and, optionally, stop the textile machine.
  • control unit CU can be programmed to operate in tension control mode when the position signal ⁇ TM of the textile machine TM indicates that it is stopped, and to operate in position control mode when the textile machine TM is in motion.
  • This criterion is particularly advantageous in that it allows the operator to knot the yarns when the textile machine is stopped.
  • the feeder 10 is also enabled to perform take-up steps in which it rotates in the opposite direction with respect to the feeding direction in order to keep the yarn Y under tension when the textile machine TM temporarily stops picking up or returns part of the yarn previously picked up.
  • control unit CU could be programmed to operate in position control mode during feeding and in tension control mode during take-up, returning the tension of the yarn to a preset value during this last step.
  • the control unit CU automatically switches to position control mode.
  • the condition in which the textile machine TM is picking up yarn can be deduced from the instantaneous tension measured by the tension sensor 20.
  • the control unit CU can be programmed to interpret a sudden collapse in the instantaneous tension as a break in picking up the yarn, even if the textile machine TM is still in motion. In this situation, as mentioned previously, the control unit CU automatically switches to tension control mode, taking up yarn in order to restore the desired tension.
  • control unit CU can also control the position of the reel 12 and, if it detects a positive movement greater than a preset amount (for example, the amount of take-up plus 2 or 3 turns), then it knows that the feeder has resumed providing yarn to the machine, and therefore it switches to position control mode again.
  • a preset amount for example, the amount of take-up plus 2 or 3 turns
  • An additional criterion for switching between the two operating modes consists in checking the change of position made by the reel 12 while the feeder operates in tension control mode and, when this change of position is positive and close (according to preset thresholds) to the change of position required by the reference position ⁇ TMR, returning to operate in position control mode.
  • the yarn take-up function is particularly advantageous for textile machines fitted with devices known as "stripers".
  • the tension reference value to be used during operation in tension control mode can be recalculated during operation in position control mode on the basis of an average tension measured in this step.
  • the position error ⁇ E' is converted directly, by means of a proportional-integrative-derivative block PID', into a current reference I' which, similarly to the previous embodiment, is compared with the equivalent current signal IR' in the subtractor node NI' in order to generate the current error IE'.
  • the yarn feeder according to the invention makes it possible to select the operating mode both manually and automatically according to the most suitable switching criterion for the type of knitting.
  • the position control mode makes it possible to control the consumption of yarn, in terms of length of yarn supplied with respect to the length of yarn required by the textile machine, in a much more precise and reliable manner than in the traditional solutions in which the speed of the reel is controlled.
  • the feeder according to the invention in tension control mode, has a precision and reliability in the supply of yarn (in terms of length of yarn supplied per machine turn) that is comparable to that of mechanical feeders actuated by mechanical transmissions, with the advantages deriving from electric drive relating to greater flexibility of adjustment (e.g., of the transmission ratio) and greater simplicity in setting up the line.
  • Another advantage of the feeder according to the invention is that it facilitates the step of calibrating the travel of the needles of the textile machine.
  • calibrating this travel requires the production of a sample garment, during which a constant amount of yarn per machine turn must be supplied.
  • the operator adjusts the travel of the needles by attempts, seeking to equalize the tensions of all the yarns downstream of the feeders.
  • the device according to the invention being provided with its own tension sensor, makes it possible to perform the adjustment in a more practical and rapid manner.
  • the operator by way of the central control system, can monitor in real time the tensions of all the yarns and optionally act only on the yarns that deviate most from the desired tension.
  • This desired tension can be advantageously an average tension calculated by the central control system, and the yarns in which the tension is too high or low can be graphically highlighted so as to facilitate their identification by the operator.
  • the tension sensor can detect when the machine stops or resumes picking up the yarn, synchronizing with the knitting of the machine. This makes it possible to use the feeder to dispense the yarn to textile machines provided with stripers which are capable of stopping and resuming the consumption of some of the yarns while the textile machine is in motion.
  • the tension sensor makes it possible to detect yarn breakage if the take-up system is present. In fact, in the event of yarn breakage, the tension will abruptly collapse and the feeder will start to rotate in the opposite direction in an attempt to return the tension to the desired level.
  • control unit can be programmed to interpret these circumstances as a consequence of yarn breakage and generate a corresponding alarm.
  • control unit could start in tension control mode and switch to position control mode when it detects a substantially constant tension with no peaks right from the start.
  • the feeder could make use of motors of a different type from those described herein, e.g., brushless DC motors, permanent-magnet synchronous motors, single-phase brushed DC motors, asynchronous motors, stepper motors, and others, which can still be driven with MOSFET bridges and the PWM technique, or other technologies such as transistors or MOSFETs operating as linear amplifiers.
  • motors of a different type e.g., brushless DC motors, permanent-magnet synchronous motors, single-phase brushed DC motors, asynchronous motors, stepper motors, and others, which can still be driven with MOSFET bridges and the PWM technique, or other technologies such as transistors or MOSFETs operating as linear amplifiers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
EP22183487.2A 2021-07-08 2022-07-07 Dispositif d'alimentation positive de fil motorisé à mode de fonctionnement sélectionnable et appareil d'alimentation en fil l'utilisant Active EP4116476B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000017966A IT202100017966A1 (it) 2021-07-08 2021-07-08 Alimentatore di filato positivo motorizzato con modalità operativa selezionabile, ed apparato di alimentazione di filato utilizzante lo stesso.

Publications (2)

Publication Number Publication Date
EP4116476A1 true EP4116476A1 (fr) 2023-01-11
EP4116476B1 EP4116476B1 (fr) 2025-04-23

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EP22183487.2A Active EP4116476B1 (fr) 2021-07-08 2022-07-07 Dispositif d'alimentation positive de fil motorisé à mode de fonctionnement sélectionnable et appareil d'alimentation en fil l'utilisant

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EP (1) EP4116476B1 (fr)
CN (1) CN115595717A (fr)
IT (1) IT202100017966A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858416A (en) 1973-07-23 1975-01-07 Eugene F White Knitting machine yarn feeding apparatus
US4752044A (en) * 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US6269844B1 (en) * 1999-10-26 2001-08-07 L.G.L. Electronics S.P.A. Device and method for moving and controlling weft winding arm in weft feeders
US20040237600A1 (en) * 2001-10-05 2004-12-02 Filippo Omeda Electronic device for regulating and controlling the delivery of yarn coming from feed units of textile machines
EP1491673A1 (fr) 2003-06-18 2004-12-29 Orizio Paolo S.p.A. Dispositif éléctronique pour l'alimentation en fils de machines textiles
US20070210198A1 (en) * 2004-10-21 2007-09-13 Memminger-Iro Gmbh Yarn delivering apparatus having a yarn return operating mode
EP1710334B1 (fr) 2005-04-06 2008-01-16 L.G.L. Electronics S.p.A. Fournisseur de fil positif pour machines textiles
US20090183528A1 (en) * 2008-01-17 2009-07-23 B.T.S.R. International S.P.A. System For Controlling The Feed Of A Yarn Or Wire To A Machine, And Relative Method
EP2067886B1 (fr) 2007-12-04 2013-03-13 B.T.S.R. International S.p.A. Procédé et agencement pour l'alimentation d'un fil de longueur absorbée constante pour une machine textile traitant une pluralité de fils
EP2572023B1 (fr) 2010-05-18 2017-10-04 BTSR International S.P.A. Procédé et dispositif améliorés permettant d'insérer un fil à tisser ou un autre fil dans une machine de traitement avec une tension et une vitesse constantes
EP2809838B1 (fr) 2012-02-03 2020-07-29 Btsr International S.P.A. Système simplifié et procédé pour le contrôle d'alimentation en fils à une machine textile avec tension et/ou vitesse de fils constante et maîtrisant une pluralité de fils
EP3763650A1 (fr) * 2019-07-11 2021-01-13 L.G.L. Electronics S.p.A. Procédé d'alimentation d'une pluralité de fils pour une machine textile au moyen de guide-fils positifs respectifs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017045B3 (de) * 2004-04-02 2005-12-08 Memminger-Iro Gmbh Vorrichtung und Verfahren zur Fadenpositivlieferung
CN107002326B (zh) * 2014-12-09 2021-04-16 美名格－艾罗有限公司 用于监测针织机的方法和装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858416A (en) 1973-07-23 1975-01-07 Eugene F White Knitting machine yarn feeding apparatus
US4752044A (en) * 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US6269844B1 (en) * 1999-10-26 2001-08-07 L.G.L. Electronics S.P.A. Device and method for moving and controlling weft winding arm in weft feeders
US20040237600A1 (en) * 2001-10-05 2004-12-02 Filippo Omeda Electronic device for regulating and controlling the delivery of yarn coming from feed units of textile machines
EP1491673A1 (fr) 2003-06-18 2004-12-29 Orizio Paolo S.p.A. Dispositif éléctronique pour l'alimentation en fils de machines textiles
US20070210198A1 (en) * 2004-10-21 2007-09-13 Memminger-Iro Gmbh Yarn delivering apparatus having a yarn return operating mode
EP1710334B1 (fr) 2005-04-06 2008-01-16 L.G.L. Electronics S.p.A. Fournisseur de fil positif pour machines textiles
EP2067886B1 (fr) 2007-12-04 2013-03-13 B.T.S.R. International S.p.A. Procédé et agencement pour l'alimentation d'un fil de longueur absorbée constante pour une machine textile traitant une pluralité de fils
US20090183528A1 (en) * 2008-01-17 2009-07-23 B.T.S.R. International S.P.A. System For Controlling The Feed Of A Yarn Or Wire To A Machine, And Relative Method
EP2572023B1 (fr) 2010-05-18 2017-10-04 BTSR International S.P.A. Procédé et dispositif améliorés permettant d'insérer un fil à tisser ou un autre fil dans une machine de traitement avec une tension et une vitesse constantes
EP2809838B1 (fr) 2012-02-03 2020-07-29 Btsr International S.P.A. Système simplifié et procédé pour le contrôle d'alimentation en fils à une machine textile avec tension et/ou vitesse de fils constante et maîtrisant une pluralité de fils
EP3763650A1 (fr) * 2019-07-11 2021-01-13 L.G.L. Electronics S.p.A. Procédé d'alimentation d'une pluralité de fils pour une machine textile au moyen de guide-fils positifs respectifs

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Publication number Publication date
CN115595717A (zh) 2023-01-13
IT202100017966A1 (it) 2023-01-08
EP4116476B1 (fr) 2025-04-23

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