EP0184779A2 - Dispositif pour ramener un métier à tisser vers des conditions d'opération prédéterminées pour recommencer le travail après une interruption, plus particulièrement après une casse de trame - Google Patents

Dispositif pour ramener un métier à tisser vers des conditions d'opération prédéterminées pour recommencer le travail après une interruption, plus particulièrement après une casse de trame Download PDF

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Publication number
EP0184779A2
EP0184779A2 EP85115492A EP85115492A EP0184779A2 EP 0184779 A2 EP0184779 A2 EP 0184779A2 EP 85115492 A EP85115492 A EP 85115492A EP 85115492 A EP85115492 A EP 85115492A EP 0184779 A2 EP0184779 A2 EP 0184779A2
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EP
European Patent Office
Prior art keywords
loom
warp
interruption
sensor
memory
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
EP85115492A
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German (de)
English (en)
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EP0184779A3 (en
EP0184779B1 (fr
Inventor
Dore Dondi Benelli
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.)
Ergotron Sas Di Dondi Benelli Dore & C
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Ergotron Sas Di Dondi Benelli Dore & C
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Application filed by Ergotron Sas Di Dondi Benelli Dore & C filed Critical Ergotron Sas Di Dondi Benelli Dore & C
Priority to AT85115492T priority Critical patent/ATE55426T1/de
Publication of EP0184779A2 publication Critical patent/EP0184779A2/fr
Publication of EP0184779A3 publication Critical patent/EP0184779A3/en
Application granted granted Critical
Publication of EP0184779B1 publication Critical patent/EP0184779B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/002—Avoiding starting marks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping

Definitions

  • the present invention relates to a device for restoring a loom to predetermined working conditions to resume its operation after an interruption, particularly after a weft breakage.
  • the sley may, due to inertia, effect one or more empty beats, and the textile controller continues to wind the woven textile.
  • the loom having been stopped and the weft renewed, if the loom is started again with the textile and the warp in the same conditions in which the operation was effectively interrupted, defects known as weft "barres", in particular voids, are created in the textile, since several weft threads are missing at the point of restarting.
  • defects may be even more marked when the thread used in the weaving is of a type almost free from elasticity and prone to extensive yielding. In this case a stoppage of the loom even if only for a short period may cause elongation of the woven textile as well as in the chain, with consequent displacement of the beat-up line of the weft on restarting.
  • a further cause of defects in the woven textile upon resumption of weaving is that the first beat upon restarting is effected under conditions which are generally different from those during normal operation and in particular the sley arrives at the beat-up line with an accelerated movement, starting from rest.
  • the object of the present invention is to provide a device which allows the restoration of a loom to predetermined working conditions upon resumption of its operation after an interruption, particularly after a breakage or exhaustion of the weft, so as to avoid the formation of weft barres in the woven textile upon resumption of working.
  • the device further includes processing circuit means connected between the detector means and the memory means and arranged to determine cyclically the average value of the warp length unwound at each beating-up from a predetermined number of beatings-up, and to supply electrical signals indicative of this average value to the memory means.
  • the said control and operating circuit means in general are arranged to cause rewinding of the warp to an extent corresponding to a whole multiple on the average value.
  • control and operating circuit means are arranged to cause rewinding of the warp to an extent corresponding to a whole multiple plus a predetermined fraction of the average value.
  • the device according to the invention is characterised in that the said drive means are constituted by the same electric motor as that of the warp tension adjustment device.
  • This warp tension adjustment device is conveniently constituted by the patented device made and sold by the Applicant under the trade name "TENDILENE”.
  • a loom is illustrated schematically, including a support frame 1 carrying a beam 2 at one end on which the warp threads or chain 3 are wound. These threads pass over a deflector roller (back rest) 4 supported in a fixed position by the frame 1.
  • a further movable tensioning roller 5 is carried by first arms 6a of inter-pivoted, V-shaped levers 6 (of which only one is.visible in Figure 1), articulated on the frame by means of pivot pins 7.
  • Springs 8 are connected to the second arms 6b of the levers 6 and are anchored to the loom frame so as to bias the thread-carrying roller 5 upwardly.
  • the warp chain threads 3 are deflected over the roller 4 and then tensioned by the roller 5 as a result of the action of the springs 8.
  • the warp chain threads 3 then reach a series of heddles 9 which separate them into two groups defining the warp opening or shed 10 in which the weft threads are inserted in succession in operation.
  • a sley is indicated 11 which, after the insertion of a weft, beats-up the weft to form the woven textile T, usually with an angular motion.
  • the textile piece is then wound onto a beam 12 by a piece drawing roller 13.
  • the beam 12 and the piece drawing roller 13 are both carried by the frame 1.
  • the main or drive shaft of the loom, from which the sley 11 (inter alia) and the heddles 9 are driven through suitable mechanisms, is indicated 14.
  • Reference 20 indicates an electric motor fixed to the frame 1 of the loom adjacent the beam 2.
  • This motor is, for example, a single phase induction motor with a starting capacitor.
  • the output shaft 20a of this motor rotates the warp chain beam 2 through a gear transmission system 21.
  • One detailed embodiment of the gear transmission 21 is described in Italian patent application no. 68110-A/82 filed by the same Applicants. This transmission achieves a velocity reduction so that when the electric motor 20 is operated and its shaft rotates at a certain speed, it causes the warp beam 2 to rotate much more slowly.
  • the electric motor 20 and the transmission 21 form part of a warp regulating device controlled by a warp tension sensor.
  • This regulating device includes, for example, a strap 15 fixed to the arm 6a of a lever 6 as shown in Figure 1 and extending between the two arms of a photoelectric position detector generally indicated 16.
  • This detector is fixed to the loom and, in known manner, has two facing arms in which a light source (or infra-red source) and a photoelectric sensor (for example a photoresistor) are housed respectively.
  • a light source or infra-red source
  • a photoelectric sensor for example a photoresistor
  • the strap 15 cuts off the radiation from the source to the photoresistor to an extent which is variable in dependence upon the tension of the warp threads.
  • the voltage between the ends of the photoresistor varies correspondingly.
  • the photoresistor is connected in a voltage divider connected to the input of a speed regulating circuit 19 of known type for the motor 20.
  • the regulating circuit regulates the speed of the motor in dependence upon the reference voltage supplied to it by the divider including the photoresistor 18, and in dependence upon the speed of the motor itself detected by a sensor S coupled to it.
  • the device according to the invention includes a tachometric sensor 30 coupled to the electric motor 20 for providing a pulsed electrical signal at a frequency indicative of the speed of rotation of the motor and hence the speed of unwinding of the chain 3 from the beam 2.
  • the tachometric sensor 30, which may be constituted by a phonic wheel sensor, could alternatively be coupled to a member of the transmission 21 or to the shaft of the beam 2.
  • the loom has a warp regulating device with an independent electric motor for driving the beam
  • the tachometric sensor 30 and the speed sensor S of the regulator may be constituted by a single device.
  • Reference 31 indicates a sensor for detecting the operation of the loom. If the shaft 14 is driven by an electric motor, this sensor could simply be constituted by a relay in series with the supply for this electric motor, such that when the electric drive motor of the loom is supplied, this relay is energised (or de-energised), and vice versa when the motor is stopped.
  • a shaft or rotatable member of the loom is indicated 32 and is driven by the drive shaft 14 so that at each beat of the sley 11 this shaft or member effects at least one complete revolution.
  • this shaft or member effects at least one complete revolution.
  • the member 32 is effectively a shaft and that it effects exactly one revolution for each beat of the sley 11.
  • a vane or tab 33 is fixed to the shaft 32 and is associated with first and second passage sensors 34, 35 fixed to the loom.
  • Each of these sensors comprises, for example, a photoemitter-photodetector pair located in a fork so that the radiation directed from the photoemitter to the photodetector is intercepted by the passage of the vane 33.
  • the passage sensors 34 and 35 are located at two distinct angular positions which can be assumed by the vane 33.
  • the tachometric sensor 30, the electric motor 20, the loom operation sensor 31 and the passage sensors 34 and 35 described above are connected to a control and operating unit generally indicated 40 in Figure 1, housed in a container or housing 41 fixed to the loom.
  • the circuit arrangement of one embodiment of the control and operating unit 40 will be described below with reference to the diagram of Figure 2. In this latter Figure devices already described above are again indicated by the same reference numerals.
  • the control and operating unit 40 includes a pulse shaping circuit 42 connected to the output of the tachometric sensor 30, a processing and memory circuit part generally indicated 43, and an execution and control circuit part generally indicated 44.
  • the control and operating unit 40 also includes a circuit 45 for detecting the rotation of the shafts 32 and 14 in the opposite sense from normal, after the stoppage of the loom. This latter circuit is connected to the passage sensors 34 and 35 and the sensor 31 described above.
  • the circuit part 43 is intended to effect its own processing principally during the normal operation of the loom while the circuit part 44 is called upon to operate mainly after a stoppage of the operation of the loom, in order to restore the desired predetermined working conditions.
  • the processing and memory circuit part 43 includes two counters 46, 47 of the type known in English terminology as “presettable up/down counters” having preset inputs 46a, 47a connected to a single presetting device 48.
  • This latter may include switches of the "Contraves” type and a visual display device 48a for providing a visual indication of the numbers input manually by the switches, these numbers corresponding to the count module of the counters 46 and 47.
  • the counter 46 has its clock input 46b connected to the output of the pulse shaping circuit 42.
  • the clock input 47b of the counter 47 is, however, connected to the passage sensors 34, 35 by an OR circuit 49.
  • a further counter indicated 50 has its count input 50a connected to the output of the counter 46 and its "reset" input 50b connected to the output of the counter 47 through a delay circuit 51.
  • the counter 50 which is of the binary type, has a plurality of parallel outputs 50c at which information bits are output in operation, which together indicate in binary code the instantaneous value reached by the counts effected by the counter. These outputs are connected in order to corresponding inputs of a memory device 52 having a corresponding plurality of outputs 52a and a loading control input 52b connected to the output of the counter 47.
  • the counters 46 and 47 may be constituted, for example, by integrated counters type 4516, the counter 50 may be formed by three integrated counters type 4520 and correspondingly the memory device 52 may comprise three type 40175 devices.
  • the circuit 45 for detecting rotation of the shafts 14 and 32 in the contrary sense includes a bistable circuit (flip-flop) of type D, indicated 60, having its data input connected to the output of one of the two passage sensors 34 or 35 and its clock input connected to the output of the other of these sensors.
  • the output of the flip-flop 60 is connected to a first input of an AND gate 61, the second input of which is connected to the output of the sensor 31 for sensing interruption of the operation of the loom.
  • the flip-flop circuit 60 maintains the input of the AND gate 61 to which it is connected at the level "0".
  • the vane 33 passes the sensors 34 and 35 in the reverse of the normal order.
  • the flip-flop circuit 60 correspondingly outputs a signal at the level "1" to the AND gate 61.
  • the AND gate 61 may output an enabling signal at level "1" only when, in conditions in which the loom has stopped, the sensors 34 and 35 signal the rotation of the shafts 14 and 32 in the opposite sense from normal.
  • the execution and control circuit part 44 includes an AND gate 62 with a first input 62a connected to the tachometric sensor 30 through the pulse shaping circuit 42. A further input 62b of this gate is connected to the output of a circuit 63 for reversing the sense cf iotation of the motor 20, formed for example with relays, controlling the connection of the starting capacitor to the windings of the electric motor 20.
  • the reversing circuit 63 has two inputs 63a and 63b for controlling the reversal.
  • the reversing circuit 63 is arranged to cause the reversal of the sense of rotation of the motor 20 when it receives a control signal at the input 63a and to restore the normal sense of rotation when it receives a command at the input 63b.
  • the pilot circuit 64 is also connected to a speed regulating circuit 19.
  • the input 62b of the AND gate 62 is maintained at level "0" whereby the output of the AND gate also remains at the level "0" preventing, as will be clarified below, the operation of all the devices of the execution and control circuit part 44 downstream of this gate.
  • the output of the AND gate 62 is connected to a first input 65a of an enabling logic circuit 65 having two outputs 65b, 65c connected respectively to the clock inputs 66a, 67a of two counters 66, 67 of the same type as the counters 46 and 47.
  • the logic circuit 65 is arranged so as normally to allow the passage of the signals from its input 65a to the input 66a of the counter 66.
  • the signals supplied to its input 65a are instead directed to the input 67a of the counter 67 when a command signal is applied to a further input 65d of this logic circuit.
  • the counters 66 and 67 have respective manually operable devices 68 and 69 of the same type as the device 48 described above for the presetting of the counting module.
  • the "carry-out" output of the counter 66 is connected to the clock input of a counter 70 formed, for example, by three integrated circuits type 4516, with the preset inputs connected in order to the outputs 52a of the memory device 52.
  • the output of the counter 70 is connected to a first input of an AND gate 71 having its output connected to the input 63b of the reversing circuit 63, to an enabling input of the pilot circuit 64 and to an actuator device 72 for controlling the brake (not illustrated) of the motor 20.
  • the counter 67 has its "carry-out" output connected to the clock input of a counter 73 of the same type as the counter 70 but having only a certain number of the preset inputs connected in order to corresponding outputs 52a of the memory device 52.
  • this memory device has twelve output terminals and the counter 73 has eight preset inputs connected to the eight outputs of the memory 52 corresponding to the less significant bits.
  • the counters 70 and 73 may each comprise three type 4516 integrated circuits connected together in cascade.
  • the counter 73 has its output connected to a second input of the AND gate 71.
  • the execution and control circuit part 44 also includes "sample and hold" circuit 90 having its sampling input connected to the voltage divider including the photoresistor 18, a memory device 91 connected to this sample and hold circuit through an analogue/digital converter 92.
  • the memory 91 is connected to a digital/analogue converter 93, the output of which is connected to a first input of a switching device 94.
  • This latter has another input connected to the divider including the-photoresistor 18 and its output connected to the input for the reference voltage of the speed regulator 19.
  • the sample and hold circuit has its clock input connected to a timing device 95 arranged to output a pulse at each beat of the sley 11.
  • This device may be formed for example in the following manner.
  • a vane 95a ( Figure 1) is fixed to the main shaft 14 of the loom; this vane has an associated passage sensor 95b, for example of the same type as the passage sensors 34, 35 described above.
  • the timing device 95 could be constituted by the vane 33 and by one of the passage sensors 34, 35.
  • the value (sampled by the sample and hold circuit 90 and converted into digital form by the converter 92) of the reference voltage supplied to the speed regulator 19 when the vane 95a passes the sensor 95b is stored in the memory 91.
  • This stored value is indicative of the speed of rotation imposed on the motor 20 during the beating-up.
  • the tension of the warp threads may vary considerably and in a pulsed manner during each individual beat, for example following the movement of the healds. Consequently the value of the reference voltage may vary considerably (about its average value) during each individual beat.
  • the angular dimension of the vane 95a and with suitable positioning of the vane 95a on the shaft 14 or of the sensor 95b it is possible to make the sampling of the reference voltage occur in one portion of the beat cycle in which the reference voltage is substantially free from sharp variations.
  • a timer 96 has an input connected to the sensor 31 for sensing the operation of the loom, and an output connected to the control input of the switching device 94. This latter normally connects the speed regulator 19 to the divider including the photoresistor 18.
  • the sensor 31 is also connected to the block input of the memory 91.
  • the device according to the invention described above operates as follows.
  • the tachometric sensor 30 thus outputs pulses at a high frequency, this frequency increasing with time as the diameter of the beam diminishes.
  • the passage sensors 34, 35 supply the counter 47 with a pulse at each beat, and thus each time a weft thread is inserted.
  • the counters 46 and 47 output a pulse for each N pulses received, N being the number input by means of the presetting device 48.
  • the counter 50 thus counts at a frequency N times less than the frequency of the pulses supplied to the input of the counter 46 and presents the indication of the count value reached at the output 50c in the form of a combination of twelve bits in parallel.
  • the counter 47 For each N wefts inserted, the counter 47 outputs a command to the memory device 52 which thus "reads" and stores the outputs of the counter 50; the counter 47 then sets the counter 50 to zero and the cycle starts again.
  • the memory device 52 stores the average number of pulses emitted by the tachometric sensor for the insertion of a weft. This average value is clearly indicative of the average angular movement of the beam 2 effected for each beat, this average being effected on the last N wefts inserted. In other words, after the insertion of N wefts the memory 52 will have stored data indicative of the average length of warp unwound at each beat.
  • the AND gate 62 is "blocked” and hence the counters 66, 67, 70, 73 are inactive.
  • the output of the AND gate 71 is at level "0" and the reversing circuit 63 enables the rotation of the electric motor 20 in the normal sense, that is, in the sense in which it allows the unwinding of the chain from the beam.
  • the memory 91 stores data indicative of the speed of rotation of the motor 20.
  • weft-feeler sensor devices (not illustrated) of known type cause the stoppage of the loom. After one or more empty beats of the sley 11, the drive shaft 14 finally stops. As a result of the empty beats, the boundary line between shed and the woven textile is moved further towards the piece beam.
  • the sensor 31 causes the "freezing" in the memory 91 of the data indicative of the (average) speed of the motor 20 immediately before the interruption.
  • the shed In order to allow the removal of the broken weft, the shed is returned to the open configuration, in the condition in which the last weft (that broken) was inserted.
  • This may be achieved manually, for example by rotating the drive shaft 14 in the opposite sense from the normal sense of rotation. This operation is, however, achieved automatically in some more recent looms.
  • the sensors 34, 35 cause the output of the AND gate 61 to change to the level "1" and consequently the reversing circuit 63 is disposed to rotate the motor 20 in the opposite sense. With reversal accomplished, the reversing circuit brings the input 62b of the AND gate 62 to level "1".
  • the latter is thus "open” to allow the pulses from the tachometric sensor 30 to pass to the logic circuit 65.
  • the pilot circuit 64 is actuated and the motor 20 rotates in the opposite sense to the sense in which it rotates in normal operation of the loom. This motor thus starts to rotate, rotating the beam 2 in the opposite sense from normal, causing the rewinding of the chain 3.
  • the tachometric sensor 30 outputs a pulsed signal at a frequency indicative of the speed of rotation of the motor 20 to the logic circuit 65 through the AND gate 62.
  • This logic circuit passes these pulses to the counter 66.
  • the latter outputs a pulse to the counter 70 for each M pulses received, M being the number set-in by the presetting device 69.
  • the number M represents the ratio between the desired drawing back of the textile warp and the average length of warp unwound at each beat in the last group of N wefts inserted just before the stoppage of the loom.
  • This number M may be set-in manually and established previously in dependence on the characteristics of the loom (in particular the number of empty beats which the sley of the loom typically carries out after breakage of the weft, before the effective stoppage of the loom), the characteristics of the thread used and the characteristics of the weave being carried out.
  • the counter 70 in turn divides the frequency of pulses received by the number stored in the memory device 52 at the moment of stoppage of the loom. If this number is indicated L, then after the counter 70 has received L pulses, it outputs a "1" to the AND circuit 71 and to the input 65d of the logic circuit 65. This latter circuit then uncouples the counter 66 from the tachometric sensor 30 and the counter 67 is coupled to this sensor.
  • the motor 20 has caused rewinding of the warp beam by an amount equivalent to M times the average length of warp unwound on average for each weft for the last group of N wefts before the stoppage of the loom.
  • the counter 67 now coupled to the tachometric sensor 30, and the counter 73 at this point enable a possible further rewinding of the warp beam to an extent equal to a predetermined fraction of the said average value of the warp length unwound at each beat before the stoppage of the loom. This occurs as follows.
  • the counter 67 outputs a pulse for each m pulses received, m being the number set-in by means of the presetting device 69.
  • the preset inputs of the counter 73 are connected to all the outputs of the memory device 52a, except for the four outputs relating to the most significant bits. Accordingly in this embodiment, the counter 73 counts up to the number L/8. Consequently, after the counter 67 has received mL/8 pulses, the counter 73 also outputs a "1" to the AND gate 71, the output of which thus changes to the level "1", causing the activation of the brake of the motor 20 through the actuator device 72, and the reswitching of the reversing circuit 63, disposing the motor 20 for subsequent rotation in the sense corresponding to the normal operation of the loom.
  • the counters 67 and 73 thus allow a supplementary rewinding of M eighths of the average value of the length of warp unwound for each weft in the last group of N wefts inserted before the stoppage.
  • the possibility of achieving rewinding of the warp to an extent corresponding to a whole multiple plus a predetermined fraction of the said average value is very important in that it allows extremely accurate positioning in the boundary line between the warp and the woven textile on resumption of operation of the loom, and in particular allows compensation for any micro-displacements due to the resilient yielding of the threads and also compensation for any foreseeable weakness in the first beat effected by the sley upon resumption of operation.
  • the sensor 31 Upon restarting the loom, the sensor 31, through the timer 96, causes the switching device 94 to change (for a predetermined period) to the condition in which it causes the application (through the converter 93) of the reference voltage stored in the memory 91 to the speed regulator 19.
  • the switching device 94 Upon restarting, it is ensured that the speed of the motor 20 is substantially equal to the speed which it would have had if the interruption had not occurred.
  • a processing and averaging circuit arranged to average, over a predetermined number of beats, the sampled values of the reference voltage supplied to the speed regulator.
  • the direct connection between the divider, including the photoresistor 18 and the regulator 19 may be eliminated: in this case this regulator would be piloted constantly with a reference voltage derived by means of sampling during the preceding beat or during a predetermined number of preceding beats.
  • a counter (indicated 150 in Figure 2) of the same type as the counters 46 and 47, provided with a presetting device (indicated 151) such as the device 48. This device would allow sampling of every Kth beat, K being the number input by the presetting device 152.
  • control and operating circuit means (40) are arranged to cause rewinding of the warp to an extent corresponding to a whole multiple of the average value.
  • control and operating circuit means (40) are arranged to cause rewinding of the warp (3) to an extent corresponding to a whole multiple plus a predetermined fraction of the average value.
  • control and operating circuit means (40) include first manually operated input means (68, 69) for enabling the input of the quantitative value of the drawing back of the warp (3).
  • Device characterised in that it further includes sensor means (31) for sensing the condition of interruption of operation of the loom, connected to the control and operating circuit means (40), and in that these circuit means (40) are arranged to cause the rewinding of the warp (3) on the beam (2) only after the sensor means (31) have indicated an interruption in the working of the loom.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP85115492A 1984-12-10 1985-12-05 Dispositif pour ramener un métier à tisser vers des conditions d'opération prédéterminées pour recommencer le travail après une interruption, plus particulièrement après une casse de trame Expired - Lifetime EP0184779B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115492T ATE55426T1 (de) 1984-12-10 1985-12-05 Verfahren zur rueckfuehrung einer webmaschine zu vorbestimmten arbeitskonditionen nach einer unterbrechung, insbesondere nach einem schussbruch.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6822884 1984-12-10
IT68228/84A IT1179857B (it) 1984-12-10 1984-12-10 Dispositivo per ripristinare in un telaio tessile condizioni operative prestabilite alla ripresa del funzionamento dopo un interruzione in particolare dopo una rottura della trama

Publications (3)

Publication Number Publication Date
EP0184779A2 true EP0184779A2 (fr) 1986-06-18
EP0184779A3 EP0184779A3 (en) 1988-01-20
EP0184779B1 EP0184779B1 (fr) 1990-08-08

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EP85115492A Expired - Lifetime EP0184779B1 (fr) 1984-12-10 1985-12-05 Dispositif pour ramener un métier à tisser vers des conditions d'opération prédéterminées pour recommencer le travail après une interruption, plus particulièrement après une casse de trame

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EP (1) EP0184779B1 (fr)
AT (1) ATE55426T1 (fr)
DE (1) DE3579127D1 (fr)
IT (1) IT1179857B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292461A1 (fr) * 1987-04-02 1988-11-23 Picanol N.V. Méthode de rectification du trajet des fils de chaîne entre l'ensouple et la foule d'une machine à tisser et de réalisation d'un changement d'ensouple;machine à tisser mettant en oeuvre cette méthode
EP0389445A1 (fr) * 1989-03-21 1990-09-26 ERGOTRON S.a.s. di DONDI BENELLI Davide & C. Méthode et dispositif pour éviter des barrures en trame dans un tissu quand un métier est redémarré après un arrêt
EP0456274A1 (fr) * 1990-05-11 1991-11-13 Tsudakoma Corporation Dispositif de contrôle de la tension de la chaîne
EP0507739A1 (fr) * 1991-04-01 1992-10-07 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour empêcher des bandes en trames dans un métier à tisser
BE1005204A3 (fr) * 1990-11-19 1993-05-25 Toyoda Automatic Loom Works Procede et appareil pour empecher la generation d'une barre de tissage dans un metier a tisser a injection.
EP3147397A1 (fr) * 2015-09-15 2017-03-29 Tsudakoma Kogyo Kabushiki Kaisha Procédé de gestion de tissage et appareil de gestion de tissage pour métier à tisser de tissu câblé de pneu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123671A1 (de) * 1991-07-17 1993-01-21 Berger Lahr Gmbh Webmaschine

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GB2000530A (en) * 1977-06-29 1979-01-10 Nissan Motor Method of and device for detecting an improper pick of weft yarn in a weaving loom
DE3213935A1 (de) * 1981-04-18 1982-10-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur positionssteuerung hinsichtlich einer vorgegebenen stop-position bei einem webstuhl
EP0080581A2 (fr) * 1981-11-27 1983-06-08 Nissan Motor Co., Ltd. Dispositif pour supprimer des barrures en trame pour un métier à tisser
EP0116292A2 (fr) * 1983-01-18 1984-08-22 Textilma AG Métier à tisser
EP0116934A2 (fr) * 1983-02-16 1984-08-29 Tsudakoma Corporation Mécanisme de contrôle du déroulage par moteur de fils de chaîne d'un métier à tisser

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US3125127A (en) * 1964-03-17 Locher
DE2206781B2 (de) * 1971-02-26 1976-03-04 Weefautomaten Picanol N.V. (Metiers automatiques Picanol S.A.), leper (Belgien) Kettablassvorrichtung
GB2000530A (en) * 1977-06-29 1979-01-10 Nissan Motor Method of and device for detecting an improper pick of weft yarn in a weaving loom
DE3213935A1 (de) * 1981-04-18 1982-10-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur positionssteuerung hinsichtlich einer vorgegebenen stop-position bei einem webstuhl
EP0080581A2 (fr) * 1981-11-27 1983-06-08 Nissan Motor Co., Ltd. Dispositif pour supprimer des barrures en trame pour un métier à tisser
EP0116292A2 (fr) * 1983-01-18 1984-08-22 Textilma AG Métier à tisser
EP0116934A2 (fr) * 1983-02-16 1984-08-29 Tsudakoma Corporation Mécanisme de contrôle du déroulage par moteur de fils de chaîne d'un métier à tisser

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292461A1 (fr) * 1987-04-02 1988-11-23 Picanol N.V. Méthode de rectification du trajet des fils de chaîne entre l'ensouple et la foule d'une machine à tisser et de réalisation d'un changement d'ensouple;machine à tisser mettant en oeuvre cette méthode
BE1000447A4 (nl) * 1987-04-02 1988-12-06 Picanol Nv Werkwijze voor het ordenen van kettingdraden tussen de kettingboom en de gaap bij weefmachines en voor het uitvoeren van een kettingboomwissel, alsook weefmachine hiertoe aangewend.
EP0389445A1 (fr) * 1989-03-21 1990-09-26 ERGOTRON S.a.s. di DONDI BENELLI Davide & C. Méthode et dispositif pour éviter des barrures en trame dans un tissu quand un métier est redémarré après un arrêt
EP0456274A1 (fr) * 1990-05-11 1991-11-13 Tsudakoma Corporation Dispositif de contrôle de la tension de la chaîne
BE1005204A3 (fr) * 1990-11-19 1993-05-25 Toyoda Automatic Loom Works Procede et appareil pour empecher la generation d'une barre de tissage dans un metier a tisser a injection.
EP0507739A1 (fr) * 1991-04-01 1992-10-07 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour empêcher des bandes en trames dans un métier à tisser
EP3147397A1 (fr) * 2015-09-15 2017-03-29 Tsudakoma Kogyo Kabushiki Kaisha Procédé de gestion de tissage et appareil de gestion de tissage pour métier à tisser de tissu câblé de pneu

Also Published As

Publication number Publication date
EP0184779A3 (en) 1988-01-20
ATE55426T1 (de) 1990-08-15
DE3579127D1 (de) 1990-09-13
IT8468228A0 (it) 1984-12-10
EP0184779B1 (fr) 1990-08-08
IT1179857B (it) 1987-09-16
IT8468228A1 (it) 1986-06-10

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