EP2230342A1 - Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser - Google Patents

Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser Download PDF

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Publication number
EP2230342A1
EP2230342A1 EP10156890A EP10156890A EP2230342A1 EP 2230342 A1 EP2230342 A1 EP 2230342A1 EP 10156890 A EP10156890 A EP 10156890A EP 10156890 A EP10156890 A EP 10156890A EP 2230342 A1 EP2230342 A1 EP 2230342A1
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EP
European Patent Office
Prior art keywords
thread
weft
nozzle
storage
weft thread
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.)
Withdrawn
Application number
EP10156890A
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German (de)
English (en)
Inventor
Hans-Dieter Scorl
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.)
Itema Switzerland Ltd
Original Assignee
Itema Switzerland Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Itema Switzerland Ltd filed Critical Itema Switzerland Ltd
Priority to EP10156890A priority Critical patent/EP2230342A1/fr
Publication of EP2230342A1 publication Critical patent/EP2230342A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • 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
    • B65H51/205—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage by means of a fluid
    • 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 invention relates to a method and to a storage device for the storage of weft threads in a weaving machine in accordance with the preamble of main method claim or with the preamble of main apparatus claim as well as to a weaving machine having one or more such storage apparatus or equipped for the carrying out of such a method.
  • Conventional weaving machines usually include a yarn store to provide a weft thread, a shed forming apparatus for the formation of a shed, a weft insertion apparatus to insert the weft thread into the shed and a reed to beat the inserted weft thread onto a fabric edge.
  • the insertion of the weft thread takes place either in a force transmitting manner, for example by means of compressed air, or in a shape matched manner, for example by means of rapiers or projectiles.
  • the weft insertion apparatus can, for example, contain nozzles for this purpose to accelerate the weft thread by means of compressed air or another fluid or rapiers in a guided or guided design into which the weft thread can be clamped or projectiles to which the weft thread can be fastened to insert the same into the shed.
  • the thread storage plays an important role for a low downtime weaving machine operation.
  • the weft thread is drawn off a supply reel package periodically in accordance with the weft insertion frequency and is stored intermediately on a drum store being held by a stop element.
  • the intermediately stored weft thread is inserted into a shed, for example by means of a force-transmitting thread transport, i.e. for example by means of acceleration nozzles and relay nozzles, and is stopped practically instantaneously at the end of the weft insertion by means of the stop element.
  • the maximum thread withdrawal speed from the supply package amounts to 20 m/s - 22 m/s for spun yarns and 25 m/s for filament yarns.
  • An intermediate storage is thus absolutely necessary since the ratio between the drawing off speed from the supply package and the maximum thread speeds on insertion is 1:3 to 1:4 and a direct, positive thread transport from the supply package via a delivery mechanism is consequently precluded.
  • the mean thread tension during the weft insertion should amount to 15% of the mean thread breaking strength and thread tension peaks should be limited to 50% of the mean thread breaking strength since higher thread tension peaks result in processing problems.
  • An alternative apparatus and method for the provision of weft threads in weaving machines is known from EP O 316 028 A .
  • the apparatus described there contains a double roller to draw the weft thread from a supply package and a storage tube which is provided with a nozzle at the inlet side to blow the drawn off weft thread into the storage tube and which is provided with a thread clip at the outlet side to clamp the weft thread tight.
  • a main nozzle is provided between the storage tube and the shed to remove the stored weft thread from the storage tube and to accelerate it in the weft direction.
  • the stored thread quantity in the storage tube is dimensioned such that the stored thread quantity is consumed toward the end of the weft insertion and the weft thread is drawn directly off the double roller only in the final phase of insertion.
  • the weft thread can thus be braked by a corresponding brake control implemented on the double roller.
  • US-A-3 669 328 further discloses a storage tube having a driving nozzle for the weft thread and a braking nozzle at the opposite end of the storage tube. No other braking devices are provided, nor additional nozzles. Due to the braking action of the second braking nozzle, poor energy is given to the flying thread upon leaving the storage device. Due to this feature, this device cannot be employed in a very fast weaving loom, since it doesn't allow complete and reliable control over timing and number of insertions of the weft thread.
  • a weft thread is blown into a storage chamber, which has an inlet side and an outlet side, from the inlet side by means of a first nozzle and is held at the outlet side of the storage chamber by means of a thread brake.
  • the thread brake is opened for the weft insertion and the weft thread is removed from the storage chamber from the outlet side toward the shed by means of a second nozzle.
  • the method is characterized in that the weft thread is kept taught by means of a third nozzle with an opposite blowing direction with respect to the second nozzle or is blown back into the storage chamber.
  • the weft thread can, for example, be kept taught before the beating up stage, whereas the blowing back of the weft thread into the storage chamber can be used, for example, for the elimination of weft defects.
  • the weft thread is advantageously drawn off a supply package by means of a delivery apparatus, for example a continuously working delivery apparatus, and is supplied to the first nozzle. Furthermore, the removed weft thread can be withdrawn from the shed by means of a controlled roller pair and supplied to the third nozzle.
  • the removed weft thread is accelerated by means of one or more acceleration nozzles which are arranged after the second nozzle in the weft direction.
  • the weft thread is braked with controlled braking force toward the end of the weft insertion by means of the weft brake.
  • the delivery apparatus and/or the blowing of the weft thread into the storage chamber and/or the removal of the weft thread from the storage chamber and/or the weft insertion and/or the blowing back of the removed weft thread is/are controlled on the basis of the measured data detected by a thread sensor which can, for example, be arranged at a mixing pipe of an acceleration nozzle and by means of which, for example, the speed and/or the length of the weft thread can be detected on the removal or on the blowing back.
  • two or more storage apparatus are respectively provided for a weft thread colour, wherein, with weft insertions with the same weft thread colour following one another, the weft thread is removed in each case alternately or cyclically from one of the storage apparatus provided for this weft thread colour.
  • an inserted thread is withdrawn from the shed and is blown back into the storage chamber by means of the third nozzle or the length of an inserted weft thread is detected by means of a thread sensor and, in the event that a weft defect is detected, the withdrawal of the weft thread from the shed takes place by means of a controlled roller pair which is docked to the weft thread for this purpose and which is controlled on the basis of the detected length of the weft thread, with the withdrawn weft thread being blown back into the storage chamber by means of the third nozzle.
  • the storage apparatus in accordance with the invention for the storage of weft threads in a weaving machine includes a storage chamber having an inlet side and an outlet side, as well as a first nozzle at the inlet side of the storage chamber for the blowing in of a weft thread and a thread brake at the outlet side of the storage chamber for the holding tight and/or braking of the weft thread and a second nozzle for the removal of the weft thread from the storage chamber.
  • the thread brake can be made as a thread brake with a controlled braking force, for example as a piezoelectric thread brake, to selectively hold the weft thread tight or to brake it with a controlled braking force.
  • the storage apparatus in accordance with the invention additionally contains a third nozzle with an opposite blowing direction with respect to the second nozzle to tauten the removed weft thread or to blow it back into the storage chamber in the event of a weft defect.
  • the storage chamber advantageously has a tubular shape, having an internal round or rounded or polygonal cross-section.
  • the storage chamber can further be made elongate and contain one, two or more storage sections in the longitudinal direction to receive the weft thread blown in and/or blown back, and the storage chamber can have a constant or tapering cross-section in the interior over at least a part of the length, for example over more than half the length.
  • the second and third nozzles contain a double injector to switch over the running direction of the weft thread between removal, on the one hand, and tautening and blowing back, on the other hand.
  • the storage apparatus additionally includes one or more acceleration nozzles which are arranged downstream of the second nozzle in the weft direction and which each contain a mixing pipe to accelerate the removed weft thread and/or the second nozzle contains a mixing pipe to accelerate the removed weft thread.
  • the storage apparatus additionally includes a thread sensor which is arranged inwardly or outwardly at a mixing pipe of the second nozzle and/or one of the acceleration nozzles to detect the speed and/or length of the weft thread on the removal or on the blowing back.
  • the storage apparatus selectively includes a delivery apparatus, for example a continuously working delivery apparatus and/or a delivery apparatus having a conveying wheel, to draw off the weft thread from a supply package and to feed it to the first nozzle; and/or a controlled roller pair for the thread withdrawal from a shed, wherein the roller pair is arranged between the shed and the second nozzle of the storage apparatus.
  • a delivery apparatus for example a continuously working delivery apparatus and/or a delivery apparatus having a conveying wheel, to draw off the weft thread from a supply package and to feed it to the first nozzle; and/or a controlled roller pair for the thread withdrawal from a shed, wherein the roller pair is arranged between the shed and the second nozzle of the storage apparatus.
  • the invention furthermore includes an arrangement having a plurality of storage apparatus in accordance with one or more of the embodiments and embodiment variants described above from which a weft thread can be removed alternately or in a pattern-controlled manner, wherein the arrangement contains at least one unit having two or more respective storage apparatus arranged next to or above one another; and wherein, in the case of a plurality of units, they are arranged over and/or next to one another If necessary, the storage apparatus of a unit can form an acute angle with one another.
  • the invention includes a weaving machine having one or more storage apparatus for the storage of weft threads in accordance with one or more of the embodiments and embodiment variants described above and/or having at least one arrangement in accordance with the above description and/or equipped for the carrying out of a method in accordance with one or more of the embodiments and embodiment variants described above.
  • the weaving machine can, for example, be made as a jet weaving machine, for example, as an air jet weaving machine, and/or as a rapier weaving machine and/or as a projectile weaving machine.
  • the one or more storage apparatus for the storage of weft threads and/or the at least one arrangement are arranged on a sley.
  • the one or more storage apparatuses for the storage of weft threads and/or the at least one arrangement is/are arranged in a stationary manner on the weaving machine and at least one acceleration nozzle is arranged on a sley.
  • the method and the storage apparatus in accordance with the present invention as well as the weaving machine in accordance with the present invention have the advantage that the thread speed at which the weft thread is drawn off the supply reel package is up to four times lower than the maximum thread speed during the weft insertion and that the weft thread can be placed in low-mass loops in the storage chamber so that the thread tension acting on the weft thread upon removal from the storage chamber is comparatively small.
  • An additional advantage is that withdrawn fault weft threads can also be placed in the storage chamber.
  • the method and the storage apparatus in accordance with the present invention are thus also suitable for the elimination of weft defects and in particular for the automatic elimination of weft breaks.
  • the thread brake arranged at the outlet side of the storage chamber can be used for braking with a controlled braking force in order thus to reduce thread tension peaks which can arise toward the end of the weft insertion when the weft thread placed in the storage chamber is consumed and the weft thread is tensioned.
  • Fig. 1 shows a jet weaving machine 1 having at least one storage apparatus 20 in accordance with the present invention.
  • the jet weaving machine can, for example, be made as an air jet weaving machine.
  • the use of the invention is, however, not limited to air jet weaving machines, but can rather also be used advantageously on other types of weaving machines such as series shed weaving machines, rapier web machines or projectile weaving machines.
  • the storage apparatus 20 for the storage of weft threads 2, 2' includes a storage tubular chamber having an inlet side and an outlet side as well as a first nozzle 21 at the inlet side of the storage chamber for the blowing in of a weft thread 2.
  • a thread brake not visible in Fig. 1 , is provided at the outlet side of the storage chamber for the holding tight and/or braking of the weft thread and a second nozzle 22 for the removal of the blown in weft thread 2' from the storage chamber.
  • the storage apparatus additionally contains a third nozzle, not visible in Fig. 1 , with an opposite blowing direction with respect to the second nozzle to keep taught the weft thread at the outlet side or to blow it back into the storage chamber in the event of a weft defect.
  • the storage apparatus additionally includes one or more acceleration nozzles 4 which are arranged downstream of the second nozzle 22 in the weft direction and which each contain a mixing pipe to accelerate the removed weft thread; alternatively the second nozzle contains itself a mixing pipe to accelerate the removed weft thread.
  • the storage apparatus 20 includes a delivery apparatus 3 which can, for example, contain a conveying wheel to draw off the weft thread 2 from a supply reel package 2a and to supply it to the first nozzle 21.
  • the storage apparatus includes a controlled roller pair 9 for the thread withdrawal from a shed, with the roller pair being arranged between the shed and the second nozzle 22 of the storage apparatus.
  • the jet weaving machine 1 illustrated in the drawings can be equipped with one or more of the following components; a supply reel package 2a; a thread centration device 2b to center the weft thread downstream of the supply reel package; a plurality of relay nozzles 5.1 a-c, 5.na-c to convey the weft threads 2' within the shed during the weft insertion; control valves 12, 13, 14, 15.1, 15.n to control the supply of fluid to the first, second and third nozzles of the storage apparatus, to the acceleration nozzle 4 and to the relay nozzles, with the latter being able to be made as individual relay nozzles each having a control valve or, as shown in Fig.
  • the one or more storage apparatus 20 for the storage of weft threads or, depending on the application, optionally an arrangement of storage apparatus are arranged stationary on the weaving machine 1.
  • at least one acceleration nozzle 4 is additionally arranged on the sley 18 just in front of the shed inlet.
  • the spacing 1 between the delivery apparatus 3 and the first nozzle 21 of the storage apparatus can be selected to be comparatively short, for example around 10 cm or 15 cm, since the storage apparatus 20 is not moving with respect to the supply reel package 2a.
  • Fig. 2 shows a second embodiment of a jet weaving machine 1 having one or more (one for each of the weft thread to be inserted by the loom) storage apparatus 20 in accordance with the present invention.
  • the weaving machine 1 shown in Fig. 2 in this respect substantially has the same components and the same design as the weaving machine of the first embodiment described above, with the exception of the one or more storage apparatus 20 which are arranged on the sley 18 in the second embodiment, i.e. they are moving integrally with the sley at each beating up of an inserted weft thread.
  • an arrangement of storage apparatus can also be arranged on the sley 18.
  • a repetition of the optionally present components of the weaving machine 1 and of the storage apparatus 20 will be dispensed with in the following since they were already named within the framework of the first embodiment described above.
  • the delivery apparatus 20 includes a respective delivery apparatus 3, the delivery apparatus is expediently arranged before the first nozzle 21 of the storage apparatus in a fixed location on the weaving machine.
  • the spacing l between the delivery apparatus 3 and the first nozzle 21 of the storage apparatus which typically amounts to 20 cm or more in the second embodiment, is advantageously selected to be so large that the weft thread does not come under tension on the beating up movement of the sley 18.
  • An additional acceleration nozzle is usually omitted with a storage apparatus arranged movable on the sley.
  • the second nozzle is mounted very close to the shed inlet and the weft thread 2' removed from the storage apparatus 20 can be accelerated by the same second nozzle 22 of the storage apparatus.
  • a roller pair for the weft withdrawal from the shed is not required. In this case, an inserted weft thread is withdrawn from the shed solely by operating the third nozzle of the storage apparatus.
  • Fig. 3 shows an embodiment of a storage apparatus 20 for the storage of weft threads in a weaving machine.
  • the storage apparatus includes a storage chamber 24 having an inlet side and an outlet side as well as a first nozzle 21 at the inlet side of the storage chamber for the blowing in of a weft thread 2 and possibly thread brake 19 at the outlet side of the storage chamber for the holding tight and/or braking of the weft thread and a second nozzle 22 for the removal of the blown in weft thread 2' from the storage chamber.
  • the thread brake device can be made as a thread brake with a controlled braking force, for example as a piezoelectric thread brake, to selectively hold the weft thread tight or to brake it with a controlled braking force.
  • the storage apparatus 20 in accordance with the invention additionally contains a third nozzle 23 with an opposite blowing direction with respect to the second nozzle to keep taught the removed weft thread or to blow it back into the storage chamber 24 in the event of a weft defect.
  • the storage chamber 24 is provided with pressure compensation openings 25 to reduce the pressure in the interior of the storage chamber so that the weft thread can be blown in and to generate a flow which conveys the blown in weft thread 2' in the direction of the outlet.
  • the number of the pressure compensation openings per unit of area typically increases toward the outlet, to guarantee that the weft thread doesn't encounter a detrimental counter pressure as it approaches the outlet of the chamber.
  • the storage chamber 24 advantageously has a round or rounded or polygonal cross-section in the interior.
  • the interior can, for this purpose, be shaped cylindrically, for example, and/or the storage chamber can be made as a pipe.
  • the storage chamber can be made elongate and contain one, two or more storage sections in the longitudinal direction to receive and house the weft thread blown in and/or blown back.
  • the storage chamber can have a constant or tapering cross-section in the interior over at least a part of the length, for example over more than half the length.
  • the second and third nozzles 22, 23 relay on a double injector, i.e. for each nozzle one injector is provided belonging to a common nozzle body or each nozzle has its own injector in one nozzle body, with the two nozzle bodies being fastened together to switch over the running direction of the weft thread between the removal phase, on the one hand, and the tautening and blowing back phase, on the other hand.
  • the second nozzle 22 contains a mixing pipe 22a to accelerate the removed weft thread.
  • the arrangement including the second and third nozzles at the outlet side of the storage chamber 24, is advantageous for keeping a good control on both tensioning and insertion timing of the weft thread.
  • the second nozzle 22, located downstream of the third nozzle can be driven independently of the third nozzle 23, to accomplish proper insertion timing of the weft into the shed; while third nozzle 23 can be controlled to properly adjust tensioning of the weft and blowing it back into the storage chamber in case of weft faults.
  • the thread brake 19 can be arranged between the second nozzle 22 and the third nozzle 23. If the second and third nozzles contain a double injector, the thread brake is advantageously arranged, as shown in Fig. 3 , between the nozzles in the common nozzle block. With nozzles made separate, it is also possible, for example, to fasten the second nozzle 22, the thread brake 19 and the third nozzle 23 to one another and/or to a common carrier.
  • the storage apparatus 20 additionally includes a delivery apparatus 3, for example a delivery apparatus having a conveying wheel to draw off the weft thread from a supply reel package and to supply it to the first nozzle.
  • a delivery apparatus 3 for example a delivery apparatus having a conveying wheel to draw off the weft thread from a supply reel package and to supply it to the first nozzle.
  • a continuously working delivery apparatus is advantageously provided. It is, however, also possible to operate the delivery apparatus intermittently if required, for example if the length of the weft thread to be inserted should be adapted or if a weft defect is repaired or the machine speed is changed. Suitable delivery devices are known, for example, from the documents EP 445489 A1 and EP 685585 A .
  • Figures 4A and 4B show an embodiment of an arrangement having two storage apparatus 20a, 20b in accordance with the present invention, viewed from the side and from above.
  • a weft thread can be removed from the storage apparatus alternately or in a pattern controlled manner.
  • the two storage apparatuses 20a, 20b or, on a case by case basis, more storage apparatuses form a unit, with the storage apparatuses expediently being arranged at an acute angle next to one another, i.e. with the weft paths forming cute angles between each other.
  • the storage apparatuses 20a, 20b each include a delivery apparatus 3a, 3b at the inlet side.
  • a reed is schematically shown as being integral with the storage apparatuses in Figures 4A and 4B to indicate that, with the exception of the delivery apparatus, the storage apparatuses are arranged on a sley together with the reed, whereas the delivery apparatus 3a, 3b are advantageously arranged in a stationary position on the weaving machine.
  • Fig. 4C shows an embodiment similar on the arrangement of Figs. 4A, 4B with selectively two or four storage apparatus, viewed from the side.
  • two storage apparatuses 20.1a, 20.2a or, on a case by case basis, more storage apparatuses are arranged over one another, with the storage apparatuses expediently forming an acute angle with one another.
  • two or, on a case by case basis, more of the units which are shown in Figures 4A and 4B and which each contain two or more storage apparatuses arranged next to one another on the horizontal plane can also be arranged over one another (on the vertical plane) to form an arrangement having at least four storage units.
  • the storage apparatuses each additionally include a delivery apparatus 3.1a, 3.2a at the inlet side.
  • a reed 8 is shown schematically as being integral with the storage apparatus to indicate that in the arrangement shown, with the exception of the delivery apparatus, the storage apparatuses are arranged movable together with the sley and the reed, whereas the delivery apparatus are advantageously arranged in a stationary position on the weaving machine.
  • Figures 5A and 5B show a second embodiment of an arrangement having two or more storage apparatus in accordance with the present invention, viewed from the side and from above.
  • a weft thread can be removed from the storage apparatus alternately or in a pattern controlled manner.
  • the two or more storage apparatus 20a, 20b form a unit, with the storage apparatuses expediently being arranged next to one another having the weft paths arranged parallel each other.
  • the storage apparatuses 20a, 20b each additionally include a delivery apparatuses 3a, 3b at the inlet side and/or at the outlet side and spaced apart from the other storage apparatus.
  • Acceleration nozzles 4a, 4b are provided with launch axis thereof arranged at an acute angle to one another.
  • a reed 8 is schematically shown as being integral with the acceleration nozzles to indicate that, in the arrangement shown, the acceleration nozzles are arranged on a sley together with the reed, whereas the storage apparatuses are advantageously arranged together with the delivery apparatus 3a, 3b in a stationary position on the weaving machine.
  • Figs. 5C and 5D show additional embodiments similar to the ones shown in Figs. 5A and 5B .
  • Two storage apparatus 20.1a, 20.2a are arranged over one another.
  • two of the units which are shown in Figures 5A and 5B and which each contain two or more storage apparatus arranged next to one another can also be arranged over one another to form an arrangement having at least four storage units.
  • the storage apparatuses additionally each include a delivery apparatus 3.1a, 3.2a at the inlet side and/or, at the outlet side and spaced apart from the other storage apparatus, in each case an acceleration nozzle 4.1a, 4.2a, with the acceleration nozzles expediently forming an acute angle.
  • the storage apparatus additionally respectively include a delivery apparatus 3.1a, 3.2a, 3,.3a at the inlet side and/or, at the outlet side and spaced apart from the other storage apparatus, in each case an acceleration nozzle 4.1a, 4.2a, 4.3a, with the acceleration nozzles expediently forming an acute angle.
  • a delivery apparatus 3.1a, 3.2a, 3,.3a at the inlet side and/or, at the outlet side and spaced apart from the other storage apparatus in each case an acceleration nozzle 4.1a, 4.2a, 4.3a, with the acceleration nozzles expediently forming an acute angle.
  • a reed 8 is schematically shown as being integral with the acceleration nozzles to indicate that, in the arrangement shown, the acceleration nozzles are arranged on a sley together with the reed, whereas the storage apparatus are advantageously arranged together with the delivery apparatus in a stationary position on the weaving machine.
  • the storage apparatus additionally includes a thread sensor which can, for example, be arranged at a mixing pipe 22a of the second nozzle 22 and/or the acceleration nozzle 4, 4a, 4b, 4.1 a - 4.3a to detect the speed and/or length of the weft thread on the removal or on the blowing back phases.
  • a thread sensor which can, for example, be arranged at a mixing pipe 22a of the second nozzle 22 and/or the acceleration nozzle 4, 4a, 4b, 4.1 a - 4.3a to detect the speed and/or length of the weft thread on the removal or on the blowing back phases.
  • Figures 6, 6A and 6B show an embodiment of such a thread sensor.
  • Fig. 6 in this respect shows a longitudinal section through the thread sensor and
  • Fig. 6A shows a cross-section.
  • the thread sensor 16 in the embodiment is made as an electrostatic measurement sensor to detect one or more movement parameters of the weft thread during the weft insertion. The detection preferably takes place in a contactless manner.
  • the thread sensor for this purpose includes a tubular carrier 16c which can simultaneously be used as a mixing pipe as required and a grid with grid elements which are arranged periodically in the thread running direction and which act as electrodes 16a, 16b.
  • the carrier can be made from an insulating pipe, for example an insulating ceramic pipe or as a plastic pipe and the electrodes can be formed at the inside or outside of the carrier.
  • the carrier can, however, also be made of a metal pipe and the electrodes can be applied to an insulating intermediate layer in the interior of the pipe.
  • the electrodes 16a, 16b are shaped cylindrically, with it also being possible, however, to use other electrode shapes inside or outside the mixing pipe such as planar electrode shapes.
  • Fig. 6B shows a possible arrangement layout of the electrodes 16a, 16b.
  • the thread sensor shown includes two electrodes with grid elements arranged periodically and in comb-like form, with a grid element of the one conductor following a grid element of the other conductor alternately in the running direction of the weft thread.
  • the individual grid elements of an electrode are each connected to one another via a conductor which can extend, as shown in Fig. 6B , for example, in the running direction of the weft thread.
  • FIG. 7A, 7B An embodiment variant of an electrode arrangement from the embodiment in accordance with Figs. 6, 6A is shown in Figs. 7A, 7B , with Fig. 7A showing a cross-section through the electrode arrangement and Fig. 7B showing a simplified view in which the electrodes are deployed into a plane for sake of clear representation.
  • the thread sensor in the embodiment of Figures 7A and 7B contains two electrodes 16a, 16b with grid elements arranged periodically and in double-comb form, with the grid elements engaging into one another and a grid element of the one conductor following a grid element of the other conductor alternately in the running direction of the weft thread.
  • the individual grid elements of an electrode are each connected to one another via a conductor which, as shown in Fig. 7B , for example, connects the grid elements at the center and can extend in the running direction of the weft thread.
  • the general operation of an electrostatic measurement sensor which is designed on the principle of the so-called spatial filtering method is known from document EP 1033579 A2 .
  • the thread sensor described above can be operated as follows, for example: If a weft thread is located in the region of the grid elements, the loads present on the weft thread generate a periodic signal component in the grid elements which can be electronically amplified and whose frequency can be detected. The detected frequency is in this respect proportional to the speed of the weft thread. The sensor is thus able not only to detect the presence, but also the instantaneous speed of a weft thread.
  • the thread sensor described above with the embodiment variants described and in particular its design at a mixing pipe of an acceleration nozzle can be used and implemented also in a system without the storage apparatus described above.
  • a weft thread 2 is blown into a storage chamber 24, which has an inlet side and an outlet side, from the inlet side by means of a first nozzle 21 and is held at the outlet side of the storage chamber by thread brake device 19.
  • the weft thread 2' is removed from the storage chamber at the outlet side by means of a second nozzle 22.
  • the method is characterized in that the removed weft thread is kept taught by means of a third nozzle 23 with an opposite blowing direction with respect to the second nozzle 22 or is blown back into the storage chamber.
  • the weft thread for example, is kept taught just before and during the beating up phase, whereas the blowing back of the weft thread into the storage chamber can be used for the elimination of weft defects.
  • the weft thread is advantageously drawn off from a supply reel package 2a by means of a delivery apparatus 3, 3a, 3b, 3.1a
  • the removed weft thread is accelerated by means of one or more additional acceleration nozzles 4, 4a, 4b, 4.1a 4.3a which are arranged downstream of the second nozzle 22 in the weft direction.
  • the weft thread is braked with controlled braking force toward the end of the weft insertion by means of the weft brake device 19, this lattter employing clamp means acting across the weft path and operated by pneumatic or electric or mechanic driving means.
  • the delivery apparatus 3, 3a, 3, 3.1 a 3, .3a and/or the blowing of the weft thread into the storage chamber 24 and/or the removal of the weft thread from the storage chamber and/or the weft insertion and/or the blowing back of the removed weft thread is/are controlled on the basis of the measured data detected by a thread sensor 16 which can, for example, be arranged at a mixing pipe 22a of the second nozzle 22 or at a mixing pipe of an acceleration nozzle 4, 4a, 4b, 4.1 a - 4.3a and by means of which, for example, the speed and/or the length of the weft thread can be detected on the removal or on the blowing back phases.
  • two or more storage apparatus 20 are respectively provided for a weft thread colour, wherein, with weft insertions with the same weft thread colour following one another, the weft thread is removed in each case alternately or cyclically from one of the storage apparatus provided for this weft thread colour.
  • weft thread colour in this respect, as usual in the textile machine sector, embraces all yarn properties such as the colour, diameter, texture, roughness and further specific yarn properties.
  • an inserted thread is withdrawn from the shed and is blown back into the storage chamber 24 by means of the third nozzle 23.
  • the inserted length of the weft thread can be detected by means of a thread sensor 16 and, in the event that a weft defect is detected, the withdrawal of the weft thread from the shed takes place by means of the third inverse operating nozzle and possibly with the aid of a controlled roller pair 9 which is docked to the weft thread for this reason.
  • the roller pair 9 is controlled on the basis of the detected length of the fault weft thread, with the withdrawn weft thread being blown back into the storage chamber 24 by means of the third nozzle.
  • the weft thread 2 is provided before the weft insertion by a delivery apparatus 3 and is blown into a storage chamber 24 which has an inlet side and an outlet side.
  • the weft thread enters the storage 24 by means of a first nozzle 21, blowing an air jet in the inserting direction, and the thread is held at the outlet side of the storage chamber by means of a thread brake 19, with the first nozzle advantageously working in the low pressure range.
  • the weft thread 2' blown in can be stored in the storage chamber 24 in loop form, for example.
  • the thread brake 19 is opened for the weft insertion and the weft thread 2' is removed from the storage chamber at the outlet side by means of the second nozzle 22, also blowing an air jet in the inserting direction.
  • the weft thread can subsequently be inserted into a shed in a known manner by means of an acceleration nozzle 4 and additional relay nozzles 5.1 a-c to 5.na-c.
  • the weft insertion is ended by closing the thread brake device 19 and the next storage procedure begins.
  • the thread delivery is typically not interrupted by the delivery apparatus at any time.
  • the emptying time of the storage chamber 24 is usually proportional to the pressure with which the second nozzle 22 and the acceleration nozzle 4 are loaded.
  • the weft thread 2' stored in the storage chamber 24 is removed in a force transmitting manner by the second nozzle 22, the acceleration nozzle 4 and the relay nozzles 5.1a-c to 5.na-c.
  • the weft thread 2' stored in the storage chamber 24 in this respect has a thread length which is smaller than the total thread length required for the weft insertion.
  • the residual thread length up to the required total thread length is delivered by the delivery apparatus 3 in shape matched manner. If the weft thread 2' stored in the storage chamber has been removed, a thread tension peak occurs due to the transition from the force-transmitting thread transport to the shape matched thread transport. This can be alleviated in that the weft thread is braked before the weft thread 2' stored in the storage chamber is used up, for example by means of a thread brake 19 with a controlled braking force.
  • the weft thread is removed alternately or cyclically from one of the storage apparatus.
  • a moderate, constant speed of the delivery apparatus results from this.
  • the speed and/or the length of the weft thread is advantageously detected during the weft insertion by a thread sensor 16 arranged at a mixing pipe 22a of the second nozzle 22 or of the acceleration nozzle and the delivery apparatus 3, on the one hand, and the braking force of the thread brake, on the other hand, are controlled using the values detected.
  • Fig. 8A shows a diagram of the thread speed v as a function of the loom drive angle during the weft insertion.
  • the drive angle is proportional to the time with a constant speed.
  • the weft thread is accelerated up to the maximum thread speed.
  • the thread speed subsequently decreases slightly through friction and the increasing thread length and drops comparatively steeply to zero toward the end of the weft insertion so that the end 1E of the weft insertion is reached.
  • the steepness of the speed drop is determined, on the one hand, by the braking force of the thread brake device 19 and, on the other hand, by the delivery speed of the delivery apparatus 3.
  • Fig. 8B shows a diagram of the path L covered by the weft thread tip as a function of the drive angle
  • Fig. 8C shows a diagram of the thread tension F as a function of the machine angle.
  • the thread tension peak toward the end of the weft insertion arises by the transition from the force transmitting thread transport to the shape matched thread transport when the weft thread stored in the storage chamber is used up and the weft thread is delivered directly from the delivery device.
  • the thread tension peak would be substantially higher without a braking of the thread speed before the transition.
  • the residual thread length delivered directly from the delivery apparatus is comparatively short in comparison with the total thread length required for the weft insertion, for example less than 20% or less than 10% or less than 5% of the required total thread length.
  • Fig. 8D shows a diagram of the opening gap S B of the thread brake device 19 as a function of the drive angle of the loom.
  • the braking force of the thread brake is in this respect dependent on the opening gap.
  • Figures 9A and 9B show the associated diagrams of the thread speeds v I , v LI , v 2 , v L2 and shed movement H during two weft insertions following one another.
  • work is carried out with two storage apparatuses 20 or, if required, more storage apparatuses and the weft thread is removed alternately from one of the storage apparatuses.
  • the weft thread 2 is provided before the weft insertion by a delivery apparatus 3 and is blown into a storage chamber 24 which has an inlet side and an outlet side from the inlet side by means of a first nozzle 21 and is held at the outlet side of the storage chamber by means of a thread brake device 19, with the first nozzle advantageously working in the low pressure range.
  • the weft thread 2' blown in can be stored in the storage chamber 24 in loop form, for example.
  • the thread brake device 19 is opened for the weft insertion and the weft thread 2' is removed from the storage chamber at the outlet side by means of a second nozzle 22.
  • the weft thread can subsequently be inserted into a shed in a known manner by means of an acceleration nozzle 4 and additional relay nozzles 5.1a-c to 5.na-c.
  • the weft insertion is ended by closing the thread brake 19 and the next storage procedure begins.
  • the thread speeds v 1 , v 2 of the first and second weft threads are shown in Fig. 9A as a function of the machine angle.
  • the first weft thread after the weft start IB 1 is accelerated up to the maximum thread speed in a first machine cycle which goes from 0° to 360°.
  • the thread speed v 1 of the first weft thread subsequently remains at a high level and drops to zero toward the end IE 1 of the weft insertion.
  • the second weft thread remains at rest during the first machine cycle.
  • the first weft thread remains at rest, whereas the second weft thread is accelerated up to the maximum thread speed after the weft start IB 2 .
  • the thread speed v 2 of the second weft thread subsequently remains at a high level and drops to zero toward the end IE 2 of the weft insertion.
  • the course of the respective thread speeds v 1 , v 2 is shown schematically in Fig. 9A . In practice, the course of the thread speeds will rather approach the course shown in Fig. 8A during a weft insertion.
  • the respective delivery speeds v L1 , v L2 at which the first and second weft threads are provided by the delivery apparatus can in this respect be substantially constant, as shown in Fig. 9A . It is, however, also possible to adapt the respective delivery speeds v L1 , v L2 , for example on adaptations of the weft thread length, on the elimination of weft defects or on changes of the machine speed. Furthermore, the weft threads can be provided intermittently as required from the delivery apparatus. Since operation is carried out with two storage apparatuses 20 in this embodiment, the weft thread can be removed alternately from one of the storage apparatus. This means that, during the weft insertion of the one weft thread, the thread store in the storage chamber belonging to the other weft thread can be filled up. A moderate and, if desired, constant speed of the delivery apparatus results from this.
  • a weft thread taken from the storage chamber 24 is kept taught by means of a third nozzle 23 with an opposite blowing direction with respect to the second nozzle 22.
  • both the first and the second weft threads are expediently tautened.
  • the embodiment described within the framework of this embodiment example for the tautening of the weft thread can, however, also be used in a corresponding manner when weft threads following one another are removed from the same storage apparatus or from more than two storage apparatus.
  • Fig. 9B shows the movement of the warp threads K 1 and K 2 in the second embodiment over two machine cycles, while the respective blowing times TT 1 , TT 2 for the tautening of the weft threads are drawn in Fig. 9A .
  • the first warp thread K 1 can be raised, for example, and the second warp thread K 2 can be lowered to form a shed for the first weft insertion.
  • the two weft threads K 1 and K 2 in this respect are representative of all warp threads of the upper shed or lower shed.
  • the first weft thread is accelerated up to the maximum thread speed after the web start IB 1 .
  • the thread speed v 1 of the first weft thread subsequently remains at a high level and drops to zero toward the end IE 1 of the weft insertion.
  • the inserted weft thread is received and held by a catching nozzle or tensioning nozzle 6 which is arranged at the catching side end of the shed.
  • a thread clip can be provided in addition to or instead of the catching and tensioning nozzle 6 at the catching side end of the shed to hold the inserted weft thread tight.
  • the respective third nozzle 23 can be pressurized to tauten the inserted weft thread also on the insertion side of the shed.
  • the respective thread brake device 19 is advantageously opened during the tautening.
  • the thread brake device 19 is normally closed and the third nozzle 23 is switched off.
  • the first warp thread K 1 is lowered and the second warp thread K 2 is raised to form a shed for the second weft insertion.
  • the tautening of the second weft thread takes place in the same manner as the tautening of the first weft thread so that reference is likewise made to the preceding description for this purpose.
  • a weft thread removed from the storage chamber 24 is blown back into the storage chamber by means of a third nozzle 23 with an opposite blowing direction with respect to the second nozzle 22.
  • Figures 10A-C show a further embodiment of a storage apparatus in accordance with the present invention, shown in connection with withdrawal of an inserted weft thread from a shed.
  • the blowing back of the weft thread into the storage chamber can be used, for example, in the automatic remedy of weft defects, for example if a weft thread standstill occurs in the shed after a weft thread brake or another disturbance, or if a weft fault occurred.
  • Fig. 10A shows a storage apparatus 20 during the weft insertion.
  • the weft thread 2 is provided before the weft insertion by a delivery apparatus 3 and is blown into a storage chamber 24 which has an inlet side and an outlet side from the inlet side by means of a first nozzle 21 and is held at the outlet side of the storage chamber by means of a thread brake device 19, with the first nozzle advantageously working in the low pressure range.
  • the storage chamber includes, as shown in Fig. 10A , two storage sections 24a, 24b which are, for example, separated from one another in the longitudinal direction by a cross-sectional restriction, the weft thread is advantageously stored in the first (i.e. the upstream one) storage section 24a.
  • the blown in weft thread 2' can be stored in loop form in the storage chamber, for example, and has the length L s directly before the weft insertion.
  • the weft thread substantially has a constant length L k from the first storage section 24a or, on a case by case basis, from the non-divided storage chamber up to a pair of thread scissors arranged at the weft side of a reed 8.
  • the thread brake device 19 is opened for the weft insertion and the weft thread 2' is removed from the storage chamber at the outlet side by means of a second nozzle 22.
  • the weft thread can subsequently be inserted into a shed in a known manner by means of an acceleration nozzle 4 and additional relay nozzles.
  • the second nozzle 22 contains a mixing pipe 22a to accelerate the removed weft thread even without using an acceleration nozzle 4.
  • a weft thread fault is detected, for example because a weft stop motion arranged at the catching side end of the shed does not deliver any arrival signal, the weaving machine is stopped. If the weaving machine comes to a standstill, the nth shed change has normally already taken place, i.e. the not completely inserted weft thread is already bound in. The weaving machine is usually moved into the open shed n-1 for the removal of an incompletely inserted weft thread from the shed.
  • Fig. 10B shows the storage apparatus 20 during an automatic weft break repair.
  • the delivery apparatus 3 is stopped as soon as a weft fault is detected.
  • a possibility of pulling the weft thread from the shed in a controlled manner is the docking of a controlled roller pair 9.
  • the weft thread drawn from the shed by means of the roller pair is subsequently blown back into the storage chamber by means of the third nozzle 23 and is stored in said storage chamber.
  • the storage chamber includes two storage sections 24a, 24b
  • the withdrawn weft thread 2" is preferably stored in the second storage section 24b, i.e. the downstream section.
  • no controlled roller pair is provided, for example with a comparatively small cloth width or if the storage apparatus is arranged together with the reed 8 on a sley, the weft thread can be withdrawn from the shed solely by the third nozzle 23.
  • the withdrawal of the weft thread is advantageously controlled by means of a thread sensor, for example by means of a thread sensor which is arranged in the mixing pipe 22a of the second nozzle 22 or in the mixing pipe of an acceleration nozzle 4.
  • the thread brake device 19 in the storage apparatus and/or a thread clip in the acceleration nozzle 4 is/are closed, the roller pair is stopped and the docking is ended when the thread tip of the withdrawn weft thread has left the shed.
  • the thread length ⁇ Ls withdrawn from the shed can, as shown in Fig. 10B , for example, be stored after the withdrawal and placing in the second storage section 24b of the storage apparatus 20, while the remaining, non-inserted web thread 2' with the length L s - ⁇ Ls can be stored in the first storage section.
  • the withdrawn weft thread is, if necessary, cut off by a pair of thread scissors arranged at the weft side end of the reed 8, for example by means of a control cut which is carried out in every case.
  • the control can be made so that the weft thread is only withdrawn under specific conditions, for example from a previously defined position of the weft thread tip in the shed.
  • Fig. 10C shows the storage apparatus 20 after the next, i.e. nth, weft insertion.
  • the inserted weft thread with the length L sn is advantageously held or clamped tight at the catching side end of the shed and is tautened by means of the third nozzle 23 to exclude thread loops on the left hand fabric side.
  • the weft thread length L sn+1 for the next weft insertion is aligned and missing lengths are added as necessary.
  • the method and the storage apparatus for the storing of weft threads as well as the weaving machine in accordance with the present invention have the advantage that they are suitable for maximum thread insertion speeds from 50 m/s to 100 m/s and more since the thread tension acting on the weft thread on the removal from the storage chamber is comparatively small.
  • a further advantage is that withdrawn weft threads can also be stored in the storage chamber so that the method described above, the described storage apparatus and the described weaving machine can also be used for the automatic weft defect repair.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP10156890A 2009-03-18 2010-03-18 Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser Withdrawn EP2230342A1 (fr)

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EP10156890A EP2230342A1 (fr) 2009-03-18 2010-03-18 Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser

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EP09155516A EP2230341A1 (fr) 2009-03-18 2009-03-18 Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser
EP10156890A EP2230342A1 (fr) 2009-03-18 2010-03-18 Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388225A (zh) * 2012-05-10 2013-11-13 史陶比尔萨尔甘斯股份公司 拉紧装置，编织机，收口机和用于将多个经纱拉紧的方法
GB2545324A (en) * 2015-12-09 2017-06-14 Griffith Textile Mach Ltd Improvements in or relating to weaving looms

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1019702A3 (nl) * 2010-12-14 2012-10-02 Picanol Werkwijze en inrichting voor het voeden van inslagdraad.
DE102012222705A1 (de) 2012-12-11 2014-06-12 Cetex Institut für Textil- und Verarbeitungsmaschinen gemeinnützige GmbH Verfahren und Vorrichtung zum Speichern von Schussfäden in einer Webmaschine
EP3106555B1 (fr) * 2015-06-16 2019-08-07 ITEMA S.p.A. Métier à tisser à pinces avec dispositif pneumatique pour l'élimination d'erreurs de trajet du préhenseur de trame et procédé
CN109943960A (zh) * 2019-04-12 2019-06-28 江门市泰林精密机械有限公司 一种钢筘装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669328A (en) 1969-06-21 1972-06-13 Luigi Castelli Yarn feeding and tensioning apparatus
CH540843A (de) * 1971-11-24 1973-08-31 Stutz Hans Verfahren und Vorrichtung zum Behandeln eines durch eine Verarbeitungsmaschine mit hoher Geschwindigkeit, gegebenenfalls ruckweise von einem Vorrat abgezogenen Fadens
EP0316028A1 (fr) 1987-11-12 1989-05-17 Picanol N.V. Méthode et appareil pour régler l'alimentation de fil de trame pour machine à tisser
EP0445489A1 (fr) 1990-03-08 1991-09-11 Sulzer RàœTi Ag Dispositif de mesure du fil de trame d'un métier à tisser
EP0685585A1 (fr) 1994-05-30 1995-12-06 Sulzer RàœTi Ag Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase
EP1033579A2 (fr) 1999-01-09 2000-09-06 Technische Universität Dresden Procédé, capteur et circuit pour la détermination sans contact du mouvement d'un fil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS152543B1 (fr) * 1969-02-21 1974-02-22
CH546845A (de) * 1972-06-16 1974-03-15 Rueti Ag Maschf Anordnung zum speichern eines fadenstueckes.
CH562346A5 (en) * 1973-10-26 1975-05-30 Rueti Ag Maschf Storing a loop of yarn for weft insertion - using a flow of air accurately adjusted to requirements
FR2296712A1 (fr) * 1974-12-31 1976-07-30 Rhone Poulenc Textile Procede et dispositif pour la formation d'entassement de fil textile
NL7600569A (nl) * 1976-01-20 1977-07-22 Rueti Te Strake Bv Weefmachine met een pneumatisch bediende buffer- inrichting voor het inslaggaren.
FR2495196A1 (fr) * 1980-11-28 1982-06-04 Alsacienne Constr Meca Procede et dispositif de formation d'une reserve de fil de trame pour metiers a tisser
HU191794B (en) * 1985-05-24 1987-04-28 Budapesti Mueszaki Egyetem Structural arrangement and yarn-storing device for looms of pneumatic weft induction
GB8815500D0 (en) * 1988-06-29 1988-08-03 Bonas Griffith Ltd Yarn store
DE3908463A1 (de) * 1989-03-15 1990-09-20 Stahlecker Fritz Vorrichtung zum zwischenspeichern eines doppelfadens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669328A (en) 1969-06-21 1972-06-13 Luigi Castelli Yarn feeding and tensioning apparatus
CH540843A (de) * 1971-11-24 1973-08-31 Stutz Hans Verfahren und Vorrichtung zum Behandeln eines durch eine Verarbeitungsmaschine mit hoher Geschwindigkeit, gegebenenfalls ruckweise von einem Vorrat abgezogenen Fadens
EP0316028A1 (fr) 1987-11-12 1989-05-17 Picanol N.V. Méthode et appareil pour régler l'alimentation de fil de trame pour machine à tisser
EP0445489A1 (fr) 1990-03-08 1991-09-11 Sulzer RàœTi Ag Dispositif de mesure du fil de trame d'un métier à tisser
EP0685585A1 (fr) 1994-05-30 1995-12-06 Sulzer RàœTi Ag Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase
EP1033579A2 (fr) 1999-01-09 2000-09-06 Technische Universität Dresden Procédé, capteur et circuit pour la détermination sans contact du mouvement d'un fil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388225A (zh) * 2012-05-10 2013-11-13 史陶比尔萨尔甘斯股份公司 拉紧装置，编织机，收口机和用于将多个经纱拉紧的方法
CN103388225B (zh) * 2012-05-10 2016-04-13 史陶比尔萨尔甘斯股份公司 拉紧装置，编织机，收口机和用于将多个经纱拉紧的方法
GB2545324A (en) * 2015-12-09 2017-06-14 Griffith Textile Mach Ltd Improvements in or relating to weaving looms
GB2545324B (en) * 2015-12-09 2022-02-16 Griffith Textile Mach Ltd Improvements in or relating to weaving looms

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