EP0608001B1 - Métier à filer à anneaux avec dispositif de mesure de la tension d'un fil et application d'un dispositif de mesure de la tension d'un fil pour la commande d'un métier à filer à anneaux - Google Patents

Métier à filer à anneaux avec dispositif de mesure de la tension d'un fil et application d'un dispositif de mesure de la tension d'un fil pour la commande d'un métier à filer à anneaux Download PDF

Info

Publication number
EP0608001B1
EP0608001B1 EP94102738A EP94102738A EP0608001B1 EP 0608001 B1 EP0608001 B1 EP 0608001B1 EP 94102738 A EP94102738 A EP 94102738A EP 94102738 A EP94102738 A EP 94102738A EP 0608001 B1 EP0608001 B1 EP 0608001B1
Authority
EP
European Patent Office
Prior art keywords
thread
thread tension
sensor
tension sensor
spinning machine
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.)
Expired - Lifetime
Application number
EP94102738A
Other languages
German (de)
English (en)
Other versions
EP0608001A1 (fr
Inventor
Peter Anderegg
Peter Oehy
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0608001A1 publication Critical patent/EP0608001A1/fr
Application granted granted Critical
Publication of EP0608001B1 publication Critical patent/EP0608001B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • B65H63/0327—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using piezoelectric sensing means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1633—Electronic actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/20—Sensing or detecting means using electric elements
    • B65H2553/26—Piezoelectric sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a ring spinning machine a thread tension sensor, as well as the application of a Thread tension sensor for controlling a ring spinning machine.
  • the DE OS 29 19 836 discloses a thread break sensor which consists of a piezoelectric element that is on one part the thread guide is attached and its output signal to Finding a thread break is processed further.
  • a rectifier filter converts the AC signals to DC signals.
  • a voltage comparator becomes a voltage range in which normal operation is guaranteed, and on The output of the comparator has a corresponding logic Output signal on (DE-OS 29 19 836, p. 10, lines 29 to p. 11, e.g. 6).
  • the thread sensor from DE-OS 29 19 836 is only in the Able to determine thread breaks, but not the Measure thread tension.
  • the ring speed faster starting of the spindles after a gradual Sequence program and secondly an overall higher operating speed of the spindles, because the in increased thread loads occurring in these operating conditions due to the reduced relative speed between Spindle and rotor can be reduced.
  • the respective Thread loading is carried out by a thread tension sensor determined, with one for each yarn material certain, desired thread tension is selected, which should be observed during the entire spinning process.
  • the measured thread tension deviates from the desired thread tension down, so the speed of the ring track becomes changes that the measured thread tension value adjusted to the desired thread tension value.
  • Exceeds the measured thread tension value has an upper limit or if it falls below a lower limit, the Spindle speed correspondingly reduced or increased until the measured thread tension value again below the upper one or is above the lower limit. To achieve and then maintaining the desired thread tension again only the speed of the ring track controlled.
  • From DE-A-37 18 924 is an automatic winder with several Known winding units, with which the spun on a spindle wound thread unwound from this spindle and on a package of a predetermined shape and one predetermined thread volume is wound up, in the thread existing defects are eliminated.
  • the the spun Thread-bearing spindle is stationary in a spindle take-up point arranged so that a spindle drive, as a ring spinning machine has, does not exist is.
  • the thread comes from the stationary spindle in the longitudinal direction withdrawn and led straight to the package.
  • the present invention has for its object a to provide improved ring spinning machine.
  • the invention is based on the knowledge belonging to the invention that the output signal of the sensor is a complex analog signal which also contains, among other things, the speed of the rotor as a fundamental vibration in the course of the deflection of the thread guide as well as harmonic values of this fundamental vibration and the so-called thread noise. in addition to other vibrations such as the natural vibrations of the thread guides and vibrations induced by machine vibrations. Furthermore, the invention is based on the inventive finding that both the level of the rotor speed and the level of harmonic frequencies of the rotor speed are a function of the thread tension, so that an evaluation of the thread tension either at the fundamental frequency (f 1 ) or at the harmonic frequencies ( f 2 to f 9 ) of the rotor speed is possible.
  • the evaluation of the sensor signal can therefore go that a comparison of the level of thread tension is carried out with a reference level.
  • This reference level can vary from machine parameters such as Depending on the spindle speed, maintenance condition etc.
  • the result this comparison can then be used to control the corresponding Machine are used, namely for control the spindle speed of a ring spinning machine in the sense of Adherence to a predetermined thread tension or one predetermined course of the thread tension over the Coping process.
  • Ring spinning machine is preferably the thread guide as Thread guide eyelet, for example in the form of the known Sauschwanzerls trained.
  • the thread guide eyelet can its holder be fixed by means of a leaf spring, the sensor is to be attached to the leaf spring.
  • the Leaf spring itself is said to be essentially level be arranged parallel to the thread movement. But it is also possible instead of a leaf spring part of the Thread guide or the thread guide eyelet itself as a spring form, the sensor or sensors then on this spring part is or are attached.
  • the piezo sensors used in the prior art are piezo crystals that have a pronounced resonance have and thereby caused for the purpose of the invention are not sufficiently broadband.
  • a particular embodiment of the present invention is characterized in that the piezo film is a so-called PVDF film is the most inexpensive to get and is extremely thin.
  • These piezo foils are very broadband and the use of such a piezo film advantageously does not lead to falsification of the measured vibrations.
  • one or more thread tension sensors can provide a non-thread-bearing reference sensor, which is a signal dependent on machine vibrations emits, the thread tension signals with the reference signal can be compared and a difference value is formed can be.
  • the reference signal can also be used as a threshold for the generation of binary thread break information be used. But it is also possible to use the Reference sensor loud environmental noises such as ultrasound from Recognize compressed air etc. and generated in the same period Declare thread tension information.
  • Fig. 2 shows a side view a spinning station 10 of a ring spinning machine, in which a thread 12 leaves the outlet rollers 14, 16 of the drafting system and through the thread guide eyelet 18 and an anti-balloon ring 20 to one rotating on the ring track 21 of the ring bench 23
  • Ring traveler 22 leads, causing it to the rotating spindle sleeve 24 is wound up to a cop 26.
  • Balloon trains through the anti-balloon or balloon containment ring 20 is limited and in the thread guide eyelet has its top.
  • the friction and air resistance of the runner, the air resistance of the thread and the frictional resistance between thread and runner and between thread and balloon confinement ring generate a thread tension that is in place the thread guide is measurable.
  • spindle speed range between about 6000 rpm and 20,000 rpm, with the thread tension sensor, as described here, without further ado for spindle speeds or runner numbers (which only by 1 or 2% are lower than the spindle speeds and thus this can be equated) up to 30,000 rpm and higher are.
  • FIG. 1a and 1b This thread sensor is shown schematically in Figs. 1a and 1b.
  • the thread guide eyelet 18 is so tapered in the rear part, that a bendable, resilient zone 30 with the shape of a Leaf spring is created.
  • the leaf spring-like part 30 is on its end facing away from the thread guide eyelet into a clamping block 35 clamped and by means of this clamping block on Frame of the ring spinning machine on a longitudinal rod 37 of the ring spinning machine held.
  • a strain sensitive Sensor element 32 On the flat right side 34 of the bendable resilient zone of the leaf spring is a strain sensitive Sensor element 32 attached, which preferably consists of a PVDF piezo film.
  • connection cable 36 a strain-dependent electrical signal to a downstream electronics (Fig. 5).
  • the thread 12 runs essentially in a straight line from the pair of delivery rollers 14, 16 to the thread guide 18 and is due to the developing Balloons deflected on the thread guide.
  • the rotation of the Runner 22 causes the thread to make a circular movement runs inside the thread guide, causing the on alternate the forces applied to the left and the right side of it.
  • This will make the leaf spring 30 also bent to the left and to the right (L and R in Fig. 1b), so that the piezo film also executes an alternating movement and generates an alternating voltage. This changing movement is important for them How the sensor works.
  • Piezo film is arranged in a plane that the Includes the thread running direction before the thread guide, could Piezo film or the leaf spring, for example laterally to be arranged offset to the thread guide. This too Arrangement would for lateral deflection of the leaf spring lead to both sides.
  • the thread guide eyelet is formed in one piece from shaped sheet metal as in FIGS. 7a, 7b and 7c.
  • the one made of spring steel Guide eye is shaped so that it in the leaf spring part 32 originally straight or rectangular cross section (Fig. 7c) of the sheet metal strip at least essentially maintained.
  • Fig. 7c the leaf spring part 32 originally straight or rectangular cross section of the sheet metal strip at least essentially maintained.
  • Fig. 7b the Transition into the actual eyelet 18 changes this cross section in an arcuate cross-section (Fig. 7b), so that the narrowest passage of the eyelet through the curved middle Area 18 'of the strip is formed while the edge areas farther from the center of the eyelet.
  • the sheet metal strip can in the leaf spring part be wider than in the eyelet as indicated at 34 '.
  • curve 38 according to FIG. 3a essentially represents a type of sine wave 40 a superimposed high-frequency oscillation 42 of a complex type.
  • the sine wave corresponds to the speed of the ring traveler 22 and the superimposed vibrations contain information over all other vibrations that the thread guide eyelet is exposed.
  • FIG. 3b If one carries out a spectral analysis of the sensor signal according to FIG. 3a, one obtains a result, as shown in FIG. 3b.
  • the basic vibration is assigned harmonic vibrations f 2 , f 3 , f 4 to f 9 and the so-called thread noise, which ranges from f 10 to f 11 .
  • the thread noise is caused on the one hand by the fibrous surface of the thread, and on the other hand by the constantly fluctuating cross-section of the thread (thinning or thickening).
  • Both the level of the speed f 1 and the level of their harmonics f 2 to f 9 are a function of the thread tension. This makes a comparison between FIGS. 3a and 3b on the one hand and FIGS. 4a and 4b on the other hand clear.
  • Thread tension sensor ranges from less than 1 Hz to more than 1 MHz, has to Consequence that not only the thread tension of the sensor signal incoming, but also machine vibrations, the majority from the range of spindle or rotor speed, but also of high-frequency components from the area of thread noise come. If a thread runs through the thread guide eyelet, do not disturb these machine vibrations because they are too are weak. In the event of a thread break, these come Vibration signals but appear and deceive a very weak thread tension signal.
  • a reference sensor is attached to the machine who works under exactly the same conditions as that Thread tension sensor, i.e. he will also be on a thread guide attached, but on one that does not lead a thread.
  • the signal from this reference sensor is similar processed like the signals from the thread-guiding sensors. Out the signal from the reference sensor is now the upper one Reference level won.
  • the reference sensor delivers the Reference level for one or more thread break sensors. This eliminates local conditions that affect the noise level determine, taken into account. It is preferred for groups with 20 to 60 active sensors, one reference sensor each.
  • the signal present at terminal 52 the sensor is amplified with one or more amplifiers 54, with filter 56 of unwanted signal components exempt and then a rectifier / integrator 58 fed.
  • the filter 56 can be a so-called moving Be a filter that controls a center frequency according to the respective rotor speed. This Center frequency can also be asymmetrical in the frequency pass band of the filter. A particularly preferred filter This type will be described later in connection with FIG. 8 described.
  • the output signal of the rectifier / integrator 58, the on terminal 60 is present, then the circuit shown in FIG. 5b supplied as an input signal.
  • the circuit according to FIG. 5a is identified overall by the reference number 62.
  • 5b shows the signal present at terminal 60 by means of an analog / digital converter 64 into a digital signal converted by a subsequent microcontroller 66 is analyzed to gain the thread tension.
  • the Terminal 70 allows a reference voltage to the Analog / digital converter to apply, this reference voltage is obtained from the reference sensor mentioned above and for the purpose of comparison with the signal present at terminal 60 also by a circuit corresponding to circuit 62 is being prepared.
  • the one generated by the microcontroller Thread tension signal is present at terminal 68 and can Machine control fed and here in controlling the speed of rotation of the Spindle drive are taken into account.
  • 5c shows an alternative embodiment of the evaluation of the signal present at terminal 60 by a comparator 72, which compares it in analog form with a reference voltage U Ref which is present at terminal 74 and, as mentioned above, from the reference sensor via a Circuit corresponding to the circuit 62 is obtained.
  • the output signal of the comparator 72 is then further processed by a microcontroller 76 into a thread tension signal which can be tapped at the terminal 78.
  • the thread tension signal can be displayed or evaluated in accordance with the thread tension signal present at terminal 68.
  • the analog / digital conversion takes place in the microcontroller 76.
  • a predetermined reference voltage U Ref can be used, which is either constant or whose level can be varied depending on machine operating states.
  • The. Fig. 6 shows an alternative evaluation, in particular can be used if a reference sensor 80, is attached to the machine as explained above, i.e. when a reference sensor 80 is attached to a thread guide that does not have a thread.
  • FIG. 6 first shows a series of input terminals 52, 52.1, 52.2 to 52.n, each of which is the signal of a thread guiding sensor 32.
  • Each terminal 52 to 52.n leads to a respective circuit 62 according to FIG. 5a and Output terminals 60, 60.1 to 60.n of these circuits 62 applied to an electronic switch 81, which in the Is able to use the signals successively or in a particular Order or in a selected order to a continue circuit 82, this further Circuit 82 either according to Fig. 5b, or 5c can be formed.
  • the clamp 52.r carries the voltage from the reference sensor 80, which also by means of a circuit 62 corresponding to FIG. 5a is amplified, filtered or integrated.
  • Like the arrow 84 shows the output signal of the reference sensor 80 associated circuit 62 the reference voltage for the Further processing circuit according to FIG. 5b or FIG. 5c.
  • the level of the reference sensor 80 becomes with the level of the thread guiding sensors 32, 32.1, 32.2 to 32.n compared. The difference is then considered pure Thread tension signal processed further, for example corresponding to Fig. 5b or 5c.
  • the switch 62 is in Usually not designed as a mechanical switch, but as an electronic circuit, for example after a multiplexing process. 6 has an arrangement the advantage that only a complex evaluation circuit is required to receive signals from a variety of thread break sensors to further process thread tension signals.
  • a ring spinning machine with several spinning positions, for example 1000 or 1200 spinning positions, becomes a piezo film sensor provided with each thread guide, so that a thread break signal from each of the total available spinning positions can be generated.
  • the wiring made so that at certain spinning positions, for example every twentieth or fiftieth spinning position a possibility there is to measure the respective thread tension.
  • the machine will then have one or two thread guides per side provided that do not lead a thread, but which just like the other thread guides trained and also with Piezo film sensors are equipped to the above mentioned Generate reference signals.
  • FIG. 8 A particularly preferred version of a moving Filters is shown in FIG. 8. It is here a block diagram showing the application of a filter in the SC version (SC means "switched capacitor"), which is preferably in the form of a chip, namely the Chip MF / 10 from National Semiconductors.
  • SC switching capacitor
  • the spindles are one Main motor 100 driven, via a so-called vertical shaft 102 and belts (not shown), each four spindles drive. The exact design of this drive is in the state well known in the art, e.g. Rieter ring spinning machines G5 / 1.
  • n is the ratio of the speed spindle to the speed main motor drive.
  • This clock frequency is then on a two-phase clock generator 114, which is part of the SC filter 56.
  • This two-phase clock generator two around the phases ⁇ 1 and ⁇ 2 generated shifted signals, which serve over the lines shown as an arrow, two To operate the switch.
  • These switches serve one purpose Condenser with the negative terminal from time to time another capacitor 122 provided with an operational amplifier 120 to connect. The rate at which the switches closed and opened at the same time determines the effective impedance of the capacitance at the input of the opamp what again defines the center frequency of the bandpass filter. Center frequency of the filter leads.
  • the amplified sensor signal coming from the amplifier 54 becomes therefore placed at the input of the filter, and the filtered signal the rectifier / integrator is then at the output of the filter 56 58 fed, according to the circuit 5a.
  • the described type of thread tension measurement can be performed at all rotor frequencies that well above the fundamental vibration frequency of the thread guide, i.e. the natural vibration frequency of the thread guide eyelet Suspension system lies.
  • This fundamental oscillation frequency is normally at about 10 to 20 Hz and the label "Significantly above” indicates frequencies that are at one Factor of about 4 to 10 or higher. So that can Thread tension measuring method according to the present invention Rotor speeds above 100 Hz, i.e. approx. 6000 rpm be used. Because such speeds are below those of interest Useful speeds of the spindles of the ring spinning machine this lower limit of the voltage evaluation in practice no restriction.
  • An advantage of an SC-type filter is that the bandwidth of the pass band of the filter is proportional is changed to the center frequency in that the quality Q of the filter remains at least essentially constant, which the signal evaluation benefits.
  • the sensor should be in the form of Piezo film in a plane containing the thread running direction or a plane parallel to this can be arranged such that the suspension of the thread guide to elastic movements both sides, based on the direction of the thread.
  • the thread running direction means for example the direction of the thread between the Delivery roller pair and the thread guide or the middle Direction of the thread within the thread balloon, with the the geometric axis of the thread balloon.
  • FIG. 9 shows a thread tension sensor which works differently than previously described.
  • FIG. 9 schematically shows that the thread guide eyelet 18 is attached to a web 92 of a thread guide holder 94 via a first load cell 90. More specifically, the thread guide eyelet is attached to one end face of the load cell 90, while the other end face of the load cell is attached to the web 92. On the other side of the web 92 there is another force measuring cell 96, which is also fastened to the web 92 with its one end, while a compensation mass 98 with the mass m 2 is attached to the end of the force measuring cell 96 facing away from the web. The load cell 96 is therefore aligned with the load cell 90, but is arranged on the other side of the web 92.
  • the thread guide eyelet 18 has a mass m 1 .
  • vibrations of the thread guide eyelet are generated and these lead to vibrations of the web, which are denoted by a in the drawing.
  • Vibrations of the thread guide holder 94 also lead to vibrations of the web. Due to the fluctuating acceleration of the masses m 1 and m 2, these vibrations lead to fluctuations in the forces on the load cells 90 and 96, so that these deliver output signals U1 and U2 with corresponding fluctuations.
  • A is the acceleration of the web 92 and F is the desired thread tension.
  • F is approximately equal to ⁇ U divided by C1.
  • m 1 is constant and ⁇ U can be measured directly, a signal for the thread tension has been obtained by means of the invention.
  • a thread tension sensor of the type described last is therefore characterized in that a thread guide eyelet via a load cell on one side of a web a thread guide bracket is attached that on the another load cell on the other side of the web attached and with the first load cell is aligned, one being the mass of the thread guide eyelet compensating mass attached to the second load cell and that the output signals of the two load cells are supplied to a differential circuit whose Output signal of the thread tension is proportional.
  • PVDF piezo films available from various manufacturers are, for example from the US company PENNWALT Corporation under the name "KYNAR" (registered trademark).
  • PVDF is an abbreviation for polyvinylidene fluoride, which leads to the Class of piezoelectric polymers.
  • Piezo foils of this type, suitable for use with the present Suitable are invention are preferably broadband with a Quality factor Q striving towards zero.
  • 10a shows a particularly preferred embodiment for the processing of signals from a group of sensors 52.1 to 52.n and by a reference sensor 52.r, by means of of a multiplexer that has 16 inputs.
  • n will normally have a maximum value of 15 and the further input is for the reference sensor used.
  • a blind thread guide intended for each group of 15 real thread guides i.e. of thread guides that actually have a thread on one Lead spinning station and the circuit according to Fig. 10a is for each group of 15 real thread guides can be duplicated.
  • the sensor signals i.e. the signals from sensors 52.1 to 52.n are amplified before multiplexer 150, filtered and rectified by the circuit according to Fig. 5a.
  • the individual channels i.e. the signals from sensors 52.1 to 52.n and 52.r with the analog / digital converter 152 one after the other connected, the microcontroller 154 to the multiplexer Sensor address determined.
  • the levels of the sensors 52.1 to 52.n are compared with the reference level from the reference sensor 52.r compared in terms of amount, the difference corresponds to Thread tension and can either be used as a reference or after corresponding calibration as an absolute value.
  • FIG. 10b shows a further improvement, after which each sensor only a respective amplifier is assigned, and the filter and the analog / digital converter are arranged after the multiplexer.
  • Microcontroller 154 gives that Multiplexer the sensor address to be switched through. Behind the signal is filtered in the multiplexer, for example by means of a circuit according to FIG. 8, and by the Analog / digital converter 152 converted into a digital signal. This signal is then sent to the microcontroller 154 fed.
  • the system works, consisting of analog / digital converter and microcontrollers not fast enough so a rectifier 156 becomes between the filter and the A / D converter used, which means that no more frequencies up must be converted to 300 Hz and evaluated, but only frequencies of approx. 1 Hz have to be measured.
  • the individual Amplifier stages in / at the sensors are replaced by a single gain stage behind the multiplexer.
  • the 10a and 10b describe circuit variants which the Allow thread tension measurement on all sensors.
  • Fig. 11 deals with the finding whether the thread is broken at the respective spinning positions.
  • the sensor signals are processed in parallel here. they are again in groups 52.1 to 52.n together with one Reference sensor 52.r combined. In this case, the The total number of sensors in a group can be up to 32.
  • the signals are first amplified, filtered and rectified and then they become in respective comparators, each of which is the comparator 72 5c correspond with the reference signal from the reference sensor 52.r compared.
  • the output of the respective comparators 72 is actually a digital signal since the comparator only decides whether the level of one active sensor is higher or lower than the reference level from the reference sensor. All signals are sent to the microcontroller 154 connected to parallel (port) inputs.
  • a simple and poorly performing i.e. inexpensive microcontroller used can be (for example, type 80C31 from Intel). A Thread tension measurement is excluded here.
  • each Microcontroller 154 each of a single sensor group are assigned, all with a serial data bus communicate, for example the type RS232 or RS485.
  • microcontrollers are exemplary for all circuit variants (about 50 pieces per machine) over an advantageous serial data bus connected to a master controller, which, for example, also through the component (chip) 80C31 can be formed by Intel.
  • This master controller is intended for the evaluation of thread information and represents the machine control or a process control compressed Data, possibly statistically evaluated, are available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Claims (11)

  1. Machine à filer à anneaux avec un entraínement de broche, avec au moins un poste de filage (10) comprenant une broche (24), avec un entraínement de broche (100) entraínant en rotation la broche (24), avec au moins un guide-fil (18) pour guider le fil (12) essentiellement non filé allant depuis une unité d'alimentation de fil (14,16) vers le poste de filage (10), avec au moins un tâteur de tension de fil (32) pour la génération d'un signal de tension de fil, représentatif pour la tension de fil du fil (12), amené dans le poste de filage (10), signal dont le niveau est comparé avec un niveau de référence dépendant de paramètres de machine, comme, par exemple, le nombre de tours de broche, l'état d'entretien, ou similaire, de sorte que le résultat de la comparaison peut être alimenté dans la commande de la machine, et peut être pris en considération lors de la commande de la vitesse de rotation de l'entraínement de broche (100), dans le but de maintenir une tension de fil prédéterminée ou un déroulement prédéterminé de la tension de fil pendant le déroulement du procédé de formation de la bobine.
  2. Machine à filer à anneaux selon revendication 1,
    caractérisée par le fait,
    qu'un tâteur de tension de fil est prévu pour la mesure de la tension de fil dans des postes de filage déterminés, par exemple, à tous les vingt ou cinquante postes de filage.
  3. Machine à filer à anneaux selon revendication 1 ou 2,
    caractérisée par le fait que
    le tâteur de tension de fil est combiné avec le guide-fil d'au moins un des postes de filage, ce par quoi le fil ne subit aucune charge supplémentaire.
  4. Machine à filer à anneaux selon l'une des revendications 1 à 3,
    caractérisée par le fait que
    le tâteur de tension de fil peut être appliqué dans la suspension (30) d'un guide-fil (18), et où le tâteur livre un signal électrique qui reflète les trépidations produites par le mouvement du fil dans le guidage du fil.
  5. Machine à filer à anneaux selon l'une des revendications précédentes 1 à 4,
    caractérisée par le fait
    qu'un tâteur de référence est prévu, qui est également soumis aux vibration de la machine, comme le tâteur de tension de fil proprement dit (32), respectivement les tâteurs de tension de fil proprement dits (32, 32.1,...,32.n), qui n'est cependant guère ou pas influencé par un fil (12) se déplaçant, et que le signal du tâteur de référence (80) livre un niveau de référence (URef) pour le tâteur de tension de fil (32) respectivement les autres tâteurs de mesure (32,32.1, ...,32.n).
  6. Machine à filer à anneaux selon l'une des revendications 1 à 5,
    caractérisée par le fait que
    le tâteur de tension de fil est un piézofilm dont le plan est au moins essentiellement disposé dans un plan contenant la direction de déplacement du fil, ou dans un plan lui étant parallèle, de telle sorte que la suspension du guide-fil réalise des mouvements élastiques des deux côtés, qu'un filtre à traitement immédiat (56) est prévu pour la filtration du signal de commande, filtre dont la bande de transmission est conduite pour un facteur de qualité, au moins essentiellement constant, selon la fréquence (f1) d'un élément enroulant le fil, afin d'obtenir soit la fréquence (f1) d'un élément (22) enroulant le fil (12) et/ou des harmoniques (f2 à f9) de cette fréquence (f1), et qu'un arrangement (66,76) est prévu pour la mesure du niveau de la fréquence filtrée, ou des fréquences, dont le signal de sortie correspond à la tension du fil.
  7. Machine à filer à anneaux selon l'une des revendications l à 3
    caractérisée par le fait que
    le tâteur de tension de fil est réalisé de telle sorte qu'un oeillet de guidage de fil (18) est mis en place sur un côté d'un barreau (92) d'une fixation de guidage de fil (94), via une cellule de mesure de force (90), que, de l'autre côté du barreau (92), une autre cellule de mesure de force (96) est mise en place sur celui-ci et alignée avec la première cellule de mesure de force (90), et où une masse m2 est mise en place sur la deuxième cellule de mesure de force pour compenser la masse m1 de l'oeillet de guidage de fil (18), et que les signaux de sortie des deux cellules de mesure de force (90,96) sont dirigés vers un circuit différenciateur, dont le signal de sortie est proportionnel à la tension du fil.
  8. Utilisation d'un tâteur de tension de fil pour la commande du nombre de tours de broche d'une machine à filer à anneaux, selon l'une des revendications 1 à 7, et où, le niveau du signal de tension de fil est comparé avec un niveau de référence dépendant de paramètres de machine, comme, par exemple, le nombre de tours de broche, l'état d'entretien, ou similaire, le résultat de la comparaison est alimenté dans la commande de la machine, et est pris en considération lors de la commande du maintien d'une tension de fil prédéterminée ou d'un déroulement prédéterminé de la tension de fil pendant le déroulement du procédé de formation de la bobine.
  9. Utilisation d'un tâteur de tension de fil selon revendication 8,
    caractérisée par le fait que
    le tâteur de tension de fil est un piézofilm dont le plan est au moins essentiellement disposé dans un plan contenant la direction de déplacement du fil, ou dans un plan lui étant parallèle, de telle sorte que la suspension du guide-fil réalise des mouvements élastiques des deux côtés, qu'un filtre à traitement immédiat (56) est prévu pour la filtration du signal de commande, filtre dont la bande de transmission est conduite pour un facteur de qualité, au moins essentiellement constant, selon la fréquence (f1) d'un élément enroulant le fil, afin d'obtenir soit la fréquence (f1) d'un élément (22) enroulant le fil (12) et/ou des harmoniques (f2 à f9) de cette fréquence (f1), et qu'un arrangement (66,76) est prévu pour la mesure du niveau de la fréquence filtrée, ou des fréquences, dont le signal de sortie correspond à la tension du fil.
  10. Utilisation d'un tâteur de tension de fil selon revendication 8 ou 9,
    caractérisée par le fait que
    le tâteur de tension de fil peut être appliqué dans la suspension (30) d'un guide-fil (10), et où le tâteur livre un signal électrique qui reflète les trépidations produites par le mouvement du fil dans le guidage du fil.
  11. Utilisation d'un tâteur de tension de fil selon revendication 8,
    caractérisée par le fait
    qu'un oeillet de guidage de fil (18) est mis en place sur un côté d'un barreau (92) d'une fixation de guidage de fil (94), via une cellule de mesure de force (90), que, de l'autre côté du barreau (92), une autre cellule de mesure de force (96) est mise en place sur celui-ci et alignée avec la première cellule de mesure de force (90), et où une masse m2 est mise en place sur la deuxième cellule de mesure de force pour compenser la masse m1 de l'oeillet de guidage de fil (18), et que les signaux de sortie des deux cellules de mesure de force (90,96) sont dirigés vers un circuit différenciateur, dont le signal de sortie est proportionnel à la tension du fil.
EP94102738A 1989-12-22 1990-12-21 Métier à filer à anneaux avec dispositif de mesure de la tension d'un fil et application d'un dispositif de mesure de la tension d'un fil pour la commande d'un métier à filer à anneaux Expired - Lifetime EP0608001B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3942685A DE3942685A1 (de) 1989-12-22 1989-12-22 Verfahren zur gewinnung eines fadenspannungssignals sowie fadensensor
DE3942685 1989-12-22
EP90125114A EP0436204B1 (fr) 1989-12-22 1990-12-21 Procédé pour l'obtention d'un signal représentant un fil en mouvement

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP90125114.0 Division 1990-12-21

Publications (2)

Publication Number Publication Date
EP0608001A1 EP0608001A1 (fr) 1994-07-27
EP0608001B1 true EP0608001B1 (fr) 1999-07-28

Family

ID=6396263

Family Applications (2)

Application Number Title Priority Date Filing Date
EP94102738A Expired - Lifetime EP0608001B1 (fr) 1989-12-22 1990-12-21 Métier à filer à anneaux avec dispositif de mesure de la tension d'un fil et application d'un dispositif de mesure de la tension d'un fil pour la commande d'un métier à filer à anneaux
EP90125114A Expired - Lifetime EP0436204B1 (fr) 1989-12-22 1990-12-21 Procédé pour l'obtention d'un signal représentant un fil en mouvement

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90125114A Expired - Lifetime EP0436204B1 (fr) 1989-12-22 1990-12-21 Procédé pour l'obtention d'un signal représentant un fil en mouvement

Country Status (5)

Country Link
US (1) US5164710A (fr)
EP (2) EP0608001B1 (fr)
JP (1) JPH06229855A (fr)
CS (1) CS643490A2 (fr)
DE (3) DE3942685A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136202A (en) * 1990-08-31 1992-08-04 Atochem North America, Inc Material sensor
IT1262088B (it) * 1993-03-17 1996-06-19 Atex Spa Sistema di controllo qualita' filato e relativo dispositivo
WO1994025870A1 (fr) * 1993-04-29 1994-11-10 Barmag Ag Procede de controle d'un fil en defilement
DE4423548A1 (de) * 1993-08-25 1995-03-02 Rieter Ag Maschf Fadenüberwachungsvorrichtung
US5606113A (en) * 1994-09-06 1997-02-25 The University Of Chicago Acoustic methods to monitor sliver linear density and yarn strength
DE4443716A1 (de) * 1994-12-09 1996-06-13 Hottinger Messtechnik Baldwin Kraftmeßvorrichtung zur Messung der Zugspannung von Fäden, Bändern oder dergleichen sowie Federblatt und Verfahren zur Herstellung eines Federblatts
DE19614027A1 (de) * 1996-04-09 1998-01-22 Inst Textil & Faserforschung Verfahren zum Nachweis von untexturierten Garnabschnitten in texturierten Filamentgarnen mittels Bestimmung hochfrequenter Fadenzugkraftsschwankungen
DE19625513A1 (de) * 1996-06-26 1998-01-02 Schlafhorst & Co W Verfahren und Vorrichtung zum Herstellen von Kreuzspulen
JP2000110039A (ja) * 1998-09-30 2000-04-18 Murata Mach Ltd 多重撚糸機
FI990651A (fi) * 1999-03-23 2000-09-24 Valmet Corp Menetelmä ja laitteisto paperi- tai kartonkirainan päänviennin suorittamiseksi
GB9910331D0 (en) * 1999-05-06 1999-06-30 Fibrevision Limited Yarn quality monitoring
DE19940161A1 (de) 1999-08-25 2001-03-01 Schlafhorst & Co W Vorrichtung zum Abgleich eines Fadenzugkraftsensors
DE10249278A1 (de) * 2002-10-23 2004-06-09 Memminger-Iro Gmbh Fadenspannungssensor
EP1707523A1 (fr) * 2005-03-31 2006-10-04 Schärer Schweiter Mettler AG Méthode et dispositif pour rebobiner des fils textiles
US7832190B2 (en) * 2005-11-18 2010-11-16 Uster Technologies Ag Characterization of fancy yarn
JP4931069B2 (ja) * 2007-06-08 2012-05-16 株式会社豊田中央研究所 糸張力検出器及びジェットルームにおける緯糸張力検出装置
JP5838768B2 (ja) 2011-11-30 2016-01-06 ソニー株式会社 検知装置、受電装置、非接触電力伝送システム及び検知方法
CN104328549B (zh) * 2013-01-29 2016-08-17 潍坊医学院 一种用于减少细纱机纱线断头的控制方法及装置
CN107190377B (zh) * 2017-07-10 2022-08-26 江南大学 在线检测环锭细纱机纺纱张力的装置及方法
CN111411429A (zh) * 2020-04-01 2020-07-14 东华大学 一种四罗拉环锭细纱机的须条检测装置

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930179A (en) * 1958-11-03 1960-03-29 Adams Inc Control system for textile machines
DE1273861B (de) * 1964-02-25 1968-07-25 Heim Sigrid Anordnung zum Messen einer Faden-, Band- oder Drahtspannung, insbesondere von Fadenspannungen bei Spulmaschinen der Textilindustrie
DE1573747A1 (de) * 1966-01-24 1969-07-24 Palitex Project Co Gmbh Geraet zum elektrischen Messen der Spannung an laufenden Faeden in Textilmaschinen
CH439034A (de) * 1966-02-21 1967-06-30 Dolder Alfred Verfahren zur Erzeugung eines Steuersignals beim Auftreten eines Fadenbruches an Textilmaschinen und Einrichtung zur Durchführung des Verfahrens
NL6808471A (fr) * 1968-06-15 1969-07-25
DE1917601C3 (de) * 1969-04-05 1980-09-25 Bayer Ag, 5090 Leverkusen Benzoxazolyl-(2)-dihydronaphtho [4,5-b] thiophene und deren Verwendung als optische Aufheller
CH542296A (de) * 1972-10-11 1973-09-30 Peyer Siegfried Fadenüberwachungsvorrichtung für Textilmaschinen
NL7310809A (fr) * 1973-08-06 1975-02-10
CH580533A5 (fr) * 1974-07-12 1976-10-15 Loepfe Ag Geb
CH587974A5 (fr) * 1975-04-23 1977-05-31 Loepfe Ag Geb
IT1054038B (it) * 1976-01-09 1981-11-10 Lanerossi Spa Metodo e dispositivi per la rile vazione automatica della presenza o assenza del filo nelle macchine di filatura
CH625484A5 (fr) * 1977-10-05 1981-09-30 Loepfe Ag Geb
CH625188A5 (en) * 1977-12-20 1981-09-15 Zellweger Uster Ag Process for evaluating an analog signal derived from the cross-section or diameter of an elongate textile product
US4254613A (en) * 1978-05-16 1981-03-10 Shinzo Kitamura Yarn break detector in ring frames
DE2919836A1 (de) * 1978-06-13 1980-02-21 Kitamura Shinzo Fadenbruchdetektor
US4182167A (en) * 1978-09-07 1980-01-08 Toray Industries, Inc. Yarn tension meter
CH639486A5 (de) * 1979-09-14 1983-11-15 Mettler S Fr Soehne Ag Maschin Piezoelektrischer geber zum erzeugen eines von der fadenzugkraft eines textilfadens abhaengigen signals.
DE3236942A1 (de) * 1981-10-09 1983-04-28 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Aufspulvorrichtung fuer synthetische faeden
DE3506698A1 (de) * 1985-02-26 1986-08-28 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Vorrichtung zum messen der fadenzugkraft eines fadens
DD248382A1 (de) * 1986-04-21 1987-08-05 Textima Veb K Verfahren und vorrichtung zur gewinnung einer fadenlaufinformation an ringspinn- und ringzwirnmaschinen
US4830296A (en) * 1986-06-05 1989-05-16 Murata Kikai Kabushiki Kaisha Automatic winder
DD251166A1 (de) * 1986-07-16 1987-11-04 Textima Veb K Fadenlaufsensor, insbesondere fuer ringspinnmaschinen
CS260729B1 (en) * 1987-04-28 1989-01-12 Zdenek Vitamvas Pickup of textile threads' tractive force
EP0368608A1 (fr) * 1988-11-08 1990-05-16 Hiroshi Yamaguchi Dispositif de filage à panneau équipé d'un moteur d'anneau et méthode pour contrôler l'opération de filage dudit dispositif

Also Published As

Publication number Publication date
DE3942685A1 (de) 1991-06-27
CS643490A2 (en) 1991-10-15
EP0436204B1 (fr) 1995-02-08
EP0608001A1 (fr) 1994-07-27
DE59010879D1 (de) 1999-09-02
JPH06229855A (ja) 1994-08-19
DE59008432D1 (de) 1995-03-23
US5164710A (en) 1992-11-17
EP0436204A1 (fr) 1991-07-10

Similar Documents

Publication Publication Date Title
EP0608001B1 (fr) Métier à filer à anneaux avec dispositif de mesure de la tension d'un fil et application d'un dispositif de mesure de la tension d'un fil pour la commande d'un métier à filer à anneaux
DE2409882C3 (de) Vorrichtung zum Erkennen des fehlerhaften Arbeiten« von Spinnmaschinen
DE2905713A1 (de) Garnwickelvorrichtung
DE102007005601A1 (de) Vorrichtung an einer Spinnereivorbereitungsmaschine, insbesondere Karde, Krempel o. dgl., zur Erfassung von Kardierprozessgrößen
DE2543839B1 (de) Vorrichtung zum erzeugen eines gleichmaessigen textilen faserbandes
DE3425345A1 (de) Verfahren und vorrichtung zum erzeugen einer gleichmaessigen, kontinuierlichen fasermenge
EP1454133A2 (fr) Utilisation de micro-ondes dans l'industrie de la filature
EP1101846A2 (fr) Dispositif de rattache containant un dispositif d'evaluation des paramètres d'une procedure de rattachement automatique
EP1960574B1 (fr) Procede pour rattacher un fil ainsi que machine de filature a rotor pour la mise en uvre du procede
DE10204328B4 (de) Verfahren zum Ermitteln der Bandmasse eines bewegten Faserverbandes und Spinnereivorbereitungsmaschine zur Durchführung dieses Verfahrens
CH672323A5 (fr)
DE102005058142A1 (de) Verfahren zur Bestimmung einer Dehnungseigenschaft einer Papierbahn
WO2016026734A1 (fr) Procédé de bobinage d'une pluralité de fils et bobineuse
DE10236778B4 (de) Verfahren und Vorrichtung zum Verstrecken von mindestens eines Faserband
DE10140645B4 (de) Verfahren zum Betreiben eines Streckwerks sowie Streckwerk
DE10297812B4 (de) Fadenspulvorrichtung und Verfahren und Vorrichtung zur Spannungsermittlung
DE102017114792A1 (de) Ringspinnmaschine mit einer Vielzahl von Spinnstellen
DE2528290C3 (de) Arbeitsverfahren und Vorrichtung zum Überwachen des gesponnenen Fadens an Offen-End-Rotorspinnmaschinen
DE4211684A1 (de) Verfahren und Vorrichtung zur Drehzahlregelung von Spinnmaschinen
EP0678601A2 (fr) Banc d'étirage contrôlé
EP1687469B1 (fr) Dispositif d'etirage pour metier a filer
CH522051A (de) Verfahren und Vorrichtung zur Überwachung und/oder Regelung der Speisung von Karden
WO2006070008A1 (fr) Procede pour determiner la masse lineique ou la section d'un composite fibreux textile et dispositif correspondant
EP1357213A2 (fr) Dispositif et procédé de réglage de la tension du fil dans des machines textiles
EP0754788B1 (fr) Méthode et dispositif pour éviter des fluctuations de masse d'un matériau fibreux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 436204

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19940906

17Q First examination report despatched

Effective date: 19951012

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 436204

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990728

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990728

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990728

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59010879

Country of ref document: DE

Date of ref document: 19990902

ITF It: translation for a ep patent filed

Owner name: GUZZI E RAVIZZA S.R.L.

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19990728

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20011127

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021127

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051221