EP0109929A2 - Détecteur de fil de trame - Google Patents

Détecteur de fil de trame Download PDF

Info

Publication number
EP0109929A2
EP0109929A2 EP83810477A EP83810477A EP0109929A2 EP 0109929 A2 EP0109929 A2 EP 0109929A2 EP 83810477 A EP83810477 A EP 83810477A EP 83810477 A EP83810477 A EP 83810477A EP 0109929 A2 EP0109929 A2 EP 0109929A2
Authority
EP
European Patent Office
Prior art keywords
control
monitor according
weaving machine
output
weft
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Withdrawn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
EP83810477A
Other languages
German (de)
English (en)
Other versions
EP0109929A3 (fr
Inventor
Hans Peter Keller
Beat De Coi
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.)
Loepfe AG Gebrueder
Original Assignee
Loepfe AG Gebrueder
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 Loepfe AG Gebrueder filed Critical Loepfe AG Gebrueder
Publication of EP0109929A2 publication Critical patent/EP0109929A2/fr
Publication of EP0109929A3 publication Critical patent/EP0109929A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/3073—Detection means therefor
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • the invention relates to a weft monitor on weaving machines, in particular on pneumatic weaving machines, with a scanning head for the weft thread having a transmitter and a receiver and an evaluation device connected to the scanning head.
  • a known device of this type (DE OS 25 13 356) has a transmitting part with at least one radiation source and a receiving part with an even number of radiation detectors.
  • the radiation sources and the radiation detectors are attached to the inner circumference of a ring through which the recording medium flows, each radiation detector receiving the radiation from only one radiation source.
  • the transmitter and receiver are connected to a differential amplifier, an evaluation device for evaluating the signals formed by the differential amplifier during a monitoring period and a switching device for switching off the weaving machine.
  • a comparator circuit of the evaluation device is periodically made ready for operation by a switching device for certain monitoring intervals. The comparator circuit compares the signals with a setpoint.
  • a photoelectric transmitter and receiver are installed in the ends of a ring-shaped weft transport fork, which emits a signal when the weft thread passes through after it is inserted and struck against the existing weave, or likewise in the absence thereof Signals are given.
  • a loop thread monitoring device on a pneumatic weaving machine with a transport channel integrated in the weaving reed has a transmitter and receiver at the catch end of the reed.
  • a respective reed with a corresponding width must be used so that the weft monitoring device can be used.
  • the aim of the invention is a weft monitor, which can be easily assembled and disassembled on the reed at various points according to the width of the woven material, without having to make any modifications. I.e. it should be possible to weave differently wide fabrics with weft monitoring using a reed. In addition, it should be possible to adapt the scanning beam intensity automatically to external influences, e.g. to obtain reliable thread detection in the event of unavoidable soiling. This thread monitor should also be usable for several working speeds of the weaving machine. In addition, the proper function of the weaving machine should also be controllable and controllable with the weft monitor.
  • the arms 4 of the scanning head 1 lie between two adjacent slats 3 of a reed 2, if the Scanning head 1 is placed on this.
  • the component with the receiver 11 on one side of the reed 2, preferably on the side of the integrated transport channel 5 for the weft 6, is detachably attached to the arms 4 of the component carrying the transmitter lo. This component can be anodized on the other side of the reed 2 facing away from the transport channel 5.
  • Transmitter lo and receiver 11 are opposite each other in a straight line.
  • the axis transmitter-receiver 11 forms the axis of the scanning beam 7. When mounting the scanning head 1, the axis of the scanning beam 7 is adjusted so that it generally cuts the path of the weft thread 6.
  • Transmitter 10 and receiver 11 are connected to an electronic evaluation device 15.
  • This has a detector circuit 16 and a control circuit 17 connected to it.
  • the detector circuit 16 regulates the intensity of the scanning beam as a function of external influences such as pollution, external light, aging, etc., in order to obtain a system-dependent, largely constant scanning beam intensity and thus reliable thread detection signals.
  • the detector circuit supplies the thread detection signals and suppresses interference signals which originate, for example, from fluff or other thread parts or from extraneous light.
  • the control circuit 17 distinguishes the thread signals which arrive correctly with respect to the working cycle of the weaving machine WM from the error-caused ones and controls the weaving machine WM accordingly or switches it off. This is particularly the case when the thread breaks.
  • the detector circuit 16 has a control circuit 2o and a thread detection circuit 4o connected to it and is connected to the control and control circuit 17 of the evaluation device 15.
  • the detector circuit 16 contains an electrical part 21 or 26 each of the transmitter 10 and the receiver 11 (hereinafter briefly also called transmitter 21 and receiver 26).
  • the transmitter 21 is located at the output of a controllable current source 22, which in turn is connected to a controllable control element, for example a sample and hold element 23, consisting of a switch and a capacitor.
  • a controllable control element for example a sample and hold element 23, consisting of a switch and a capacitor.
  • One input of this sample and hold element 23 is connected to the control and control circuit 17 and the other input to a comparison element 24, which in turn is fed by a reference element 25, which supplies an adjustable voltage, and the receiver 26.
  • the receiver 26 is also at the yarn detection circuit 4 0, ie, 41 at the first comparator This is followed in series an integrator 42 and a second comparator 43.
  • the second comparator 43 is connected to the control and control circuit 17.
  • the monitoring and control circuit 17 comprises a switch controlled by the weaving machine WM encoder 5 0, for example, a trigger, on which, in a specific time in each operating period of the loom WM, for example at 22 0 °, a start pulse and at a subsequent time, for example, at 31 0 °, gives a stop pulse as a limitation for a Steer interval.
  • This control interval can be the same as a control interval, which is used to determine the correct weft thread entry.
  • the control interval can also contain the control interval as a real subset. Only when the thread signal is within the control interval is the weft not only entered but also entered at the right time.
  • the output of the trigger is connected to a first AND gate 51 and a third AND gate 65.
  • an adjustable, monostable flip-flop 62 which acts as a timing element, and to a counter, in particular a five-stage up counter 83 of the counter and display unit Bo.
  • the adjustable, monostable flip-flop 62 lies on the one hand on a second AND element 64 and on the other hand on a first monostable Toggle element 63, which is located at the second input of the second AND element 64 and at the output of the third AND element 65.
  • the output of the first monostable trigger element is connected to the sample and hold element 23 of the detector circuit 16.
  • the second AND gate 64 the second input of each first and third AND element 6l and 65 as well as an input of a fourth AND element 71 of a counting pulse unit 7 is 0.
  • the fourth AND gate 71 is connected to a pulse generator, in particular to a stable flip-flop 72, which also belongs to the counting pulse unit.
  • the pulses of the Zählimpulsgenerators 72 are of a five-stage up-counter 83 recorded a counting and display unit 8 0, the output of the up-counter 83eine remind 9o at the second input of the fourth AND element 71 and the other hand to an input of a fifth AND element 91 of a control unit lies.
  • the second input of the fifth AND gate 91 is connected to the output of the third AND gate 65.
  • the counting and display unit 80 includes Außem the up counter 83 has a memory 81, which with its one input to the second comparator 43 of the thread detection circuit 4 0 with its other input of the first monostable multivibrator 63 and to its output, depending on a display device 82, and the five-stage up-counter 83 lies. These two are also related.
  • the control unit 9o is a series circuit consisting of the fifth AND element 91, a second monostable flip-flop 92 and a relay 93 of the loom WM.
  • the detector circuit 16 supplies a signal to the control and control circuit 17, which determines whether the thread signal was generated at the right time with regard to the working cycle of the weaving machine WM. If this is not the case, a signal for switching off the loom WM is generated and fed to the relay 93 of the loom.
  • the regulation of the intensity of the scanning beam 7 is carried out by the control circuit 20 when a signal is not present at the input of the sample and hold element 23 on the control and control circuit side.
  • the switch in this element 23 is closed and its capacitor is charged.
  • control interval and the control interval do not overlap.
  • a quick control process i.e. a control interval less than one working period, proved to be more advantageous.
  • control interval in which it is determined whether a thread signal and whether it occurs at the correct time.
  • the trigger 5o controlled by the WM loom emits a stop pulse (FIG. 4) and a stop pulse some time later. For example at 22 0 ° or at 31 0 °. These impulses determine the control interval.
  • the start pulse completes the regulation of the intensity of the scanning beam 7 in the control circuit 20. This is done by opening the switch in the sample and hold element 23. Since the capacitor of this element 23 is charged, it takes over the control of the current source 22 in order to emit the current for the scanning beam 7 in accordance with the last intensity value before the end of the control interval.
  • the control interval is, for example, a partial interval of the control interval and is determined by the feedback timer unit 6o and the counting and display unit 80. If a weft thread cuts the scanning beam 7 in this control interval, a voltage jump occurs in the receiver 26, which reaches the first comparator 41. If this pulse lasts for a sufficiently long time, the voltage in the integrator 42 rises to a value corresponding to the threshold value of the second comparator 43 connected downstream with a rise time which is matched to the conditions. This emits a thread pulse to the memory 81.
  • the start and trigger pulse 5o puts the control and control circuit 17 in a state (control interval) in which a thread signal from the receiver 26 can be accepted. That is, the adjustable, monostable flip-flop 62 and the first monostable flip-flop 63 tilt. The adjustable point in time of the tilting back of the adjustable, monostable flip-flop 62 triggers the sequence of counting pulses in the astable flip-flop 72 of the counting pulse unit 7o. This series of count pulses is applied to a five-stage up counter 83. This stops when a thread pulse lying in the control interval arrives from the detector circuit via memory 81. If no thread impulse arrives, it stops at a certain counter level.
  • a display device 82 is connected to the five-stage up counter 83 and has a light-emitting diode for each count pulse or each pulse group. Only the light-emitting diode assigned to the corresponding counting pulse lights up with that Thread signal coincides. If the thread signal occurs in the target area, a green light-emitting diode lights up, for example, and no control pulse is given to the relay 93 of the loom WM to switch it off. If the thread signal occurs before or after the target range, then for example one red LED lights up and a switch-off pulse is emitted.
  • this display device can also be used as an error display when the weaving machine is running incorrectly, since the position of the thread signal permits such interpretations.
  • the evaluation device can be set so that the same light-emitting diode always lights up when the thread signal arrives at the right time. If the thread signal does not arrive at the right time, the corresponding display can be fixed, because the troubleshooting is simplified.
  • Thread lint is distinguished from the weft thread 6 by the thread detection circle 4o.
  • a fluff only gives a short impulse.
  • the integrator 42 cannot reach the threshold value for the subsequent second comparator 43 in the event of a short pulse due to its rise time. This threshold value is selected and set in relation to a real thread pulse. The lint pulse can thus be clearly separated from the thread pulse.
  • the thread vibration is also filtered out by this thread detection circuit 4o. If the weft thread 6 briefly emerges from the area of the scanning beam 7, the short time is not sufficient for the integrator 42 to lower the tension value below the threshold value of the second comparator 43. This means that the signal does not change. The thread pulse remains at the memory 81.
  • the transmitter lo can be arranged in the scanning head 1 such that it is on the back of the reed 2 and the receiver 11 comes to lie on the front.
  • this transmitter / receiver arrangement can be advantageous because a shorter distance between the weft thread 6 and the receiver 11 results in a larger covering field, which can outweigh the higher contrast at a greater distance.
  • polygonal test beam paths 7 consisting of two or more straight lines are provided, mirrors or the like being used for deflecting the rays.
  • Such beam paths can be advantageous for a particularly compact design of the scanning head 1 or in the case of special space conditions in the reed 2.
  • FIG. 10 Another variant of an evaluation device (FIG. 10) has a control circuit 20! with a transmitter 21 ', which is controlled by an amplitude-controlled oscillator 29' and this by a sample and hold element 23 '.
  • a comparison element 24' At the sample and hold element 23 'there is the output of a comparison element 24' which receives the signal from the receiver 26 'via a selective filter 27', a rectifier 28'-1 and a smoothing element 2B'-2 with the reference voltage of a reference element 25 '. compares.
  • the smoothing element 28'-2 is the thread detection circuit as in the variant according to FIG. 3.
  • This variant with pulsating light functions in the same way as the regulating element with constant, controllable light.
  • Another control circuit 2 0 “ (Fig. 11) has an oscillator 3 0 ", which is located at the transmitter. From the receiver 26 ", the signal passes through an iron-selective amplifier 31", a rectifier 28 "-1 and a smoothing element 28" -2, on which the thread detection circuit is also connected, to a comparison element 24 ", where it is at the constant reference voltage of the reference element 25 "is compared and passed to a sample and hold element 23". When this element 23 "is closed, it reaches the selective amplifier and controls it. If there is a difference ⁇ o in the comparator 24 ", the amplifier range is adjusted. The trigger pulse ends the control process and the selective amplifier 31" is held in its last working range.
  • an inverter 51 * is provided, which is connected to the trigger 5o * on the input side, which also feeds a memory 81 * and the sample and hold element 23 * , and is connected to a control unit 9o * on the output side . This is also connected to the memory 81 * . It whips a fifth AND link 91 *, which is in series with a dynamic monostable flip-flop 95 * and a relay 93 * for controlling the weaving machine.
  • Another control unit 9o ** is controlled directly by trigger 5o ** and memory 81 ** . It contains a dynamic AND gate 95 ** , to which a second monostable multivibrator 92 ** . and a relay 93 ** of the weaving machine WM is connected to this, the second input of the dynamic AND element 95 ** being connected to the memory 81 ** .
  • an evaluation device has microprocessors which can perform all switching functions of the circuit combinations described above. oo782 / P o7.11.1982 / RT

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP83810477A 1982-11-11 1983-10-17 Détecteur de fil de trame Withdrawn EP0109929A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6566/82A CH659672A5 (de) 1982-11-11 1982-11-11 Schussfadenwaechter.
CH6566/82 1982-11-11

Publications (2)

Publication Number Publication Date
EP0109929A2 true EP0109929A2 (fr) 1984-05-30
EP0109929A3 EP0109929A3 (fr) 1985-08-28

Family

ID=4311607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810477A Withdrawn EP0109929A3 (fr) 1982-11-11 1983-10-17 Détecteur de fil de trame

Country Status (4)

Country Link
US (1) US4565224A (fr)
EP (1) EP0109929A3 (fr)
JP (1) JPS5988950A (fr)
CH (1) CH659672A5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137380A3 (en) * 1983-10-10 1986-03-19 Roj Electrotex S.P.A. Optical weft sensor for air jet weaving looms
EP0212727A1 (fr) * 1985-08-26 1987-03-04 Picanol N.V. Détecteur optique de fil de trame pour métiers à tisser avec un peigne en forme de U

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8302456A (nl) * 1983-07-11 1985-02-01 Rueti Te Strake Bv Inrichting ter bevestiging van een hulporgaan aan het riet van een spoelloze weefmachine.
JPS6155239A (ja) * 1984-08-16 1986-03-19 津田駒工業株式会社 不良緯糸自動補修制御装置
JPS61231246A (ja) * 1985-04-05 1986-10-15 津田駒工業株式会社 織機の集中制御方法
JPS61252343A (ja) * 1985-04-25 1986-11-10 株式会社豊田自動織機製作所 ジエツトル−ムにおける緯糸検出方法
EP0204093B1 (fr) * 1985-04-05 1989-08-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Méthode et dispositif pour détecter des fils de trame dans un métier automatique à fils de trame
JPS63239353A (ja) * 1987-03-26 1988-10-05 Mazda Motor Corp デイ−ゼルエンジンの排気還流装置
DE3843683A1 (de) * 1988-12-23 1990-06-28 Dornier Gmbh Lindauer Schussfadenwaechter fuer luftwebmaschinen
BE1006073A3 (nl) * 1992-07-03 1994-05-03 Picanol Nv Inslagwachter voor weefmachines.
ITTO20040795A1 (it) * 2004-11-12 2005-02-12 Microtex Sas Dispositivo e metodo per la rivelazione del filo di trama in un telaio tessile a getto, con sensore ottico a luce trasmessa, non invasivo, a posizionamento registrabile in modo continuo, ad alta fidatezza e sensibilita'
US20070044957A1 (en) * 2005-05-27 2007-03-01 Oil Sands Underground Mining, Inc. Method for underground recovery of hydrocarbons
US8287050B2 (en) * 2005-07-18 2012-10-16 Osum Oil Sands Corp. Method of increasing reservoir permeability
US8127865B2 (en) * 2006-04-21 2012-03-06 Osum Oil Sands Corp. Method of drilling from a shaft for underground recovery of hydrocarbons
WO2008064305A2 (fr) 2006-11-22 2008-05-29 Osum Oil Sands Corp. Récupération de bitume par excavation hydraulique

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH485054A (de) * 1968-10-10 1970-01-31 Sulzer Ag Optischer Schussfadenwächter für eine Webmaschine
US3824401A (en) * 1971-11-16 1974-07-16 Enshu Seisaku Kk Photoelectric type weft sensing process and weft sensor
CH547371A (de) * 1972-01-13 1974-03-29 Sulzer Ag Verfahren zum ueberwachen des eintragens der schussfaeden bei einer webmaschine, vorrichtung zur durchfuehrung des verfahrens.
NL7206367A (fr) * 1972-05-10 1973-11-13
NL7206368A (fr) * 1972-05-10 1973-11-13
FR2269593A1 (en) * 1974-04-22 1975-11-28 Rockwell International Corp Shuttleless loom weft monitor - has photo-electric units mounted to reed to allow high-speed operation
DE2451533A1 (de) * 1974-10-30 1976-05-06 Leuze Electronic Kg Vorrichtung zum abtasten von faeden, fadenaehnlichen gebilden und dergleichen
CH589738A5 (fr) * 1975-03-21 1977-07-15 Sulzer Ag
JPS52155262A (en) * 1976-06-17 1977-12-23 Nissan Motor Woof detector
JPS52155261A (en) * 1976-06-17 1977-12-23 Nissan Motor Woof detector
CH614246A5 (fr) * 1977-02-17 1979-11-15 Loepfe Ag Geb
CH630126A5 (de) * 1978-03-09 1982-05-28 Loepfe Ag Geb Elektronischer fadenwaechter fuer eine webmaschine mit ortsfester schussgarn-vorratsspule.
JPS54147262A (en) * 1978-04-28 1979-11-17 Tsudakoma Ind Co Ltd Method and apparatus for setting sensitivity of detector of warp passing condition
US4295499A (en) * 1978-12-12 1981-10-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Detection of weft in shuttleless loom
JPS5953932B2 (ja) * 1979-08-02 1984-12-27 宏 水越 光電式緯糸探知方法
JPS5668142A (en) * 1979-11-07 1981-06-08 Toyoda Automatic Loom Works Accident detecting method of weft yarn detector in loom
JPS6328225Y2 (fr) * 1980-03-15 1988-07-29
CH647279A5 (de) * 1980-10-14 1985-01-15 Loepfe Ag Geb Elektronischer schussfadenwaechter an einer luftduesenwebmaschine.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137380A3 (en) * 1983-10-10 1986-03-19 Roj Electrotex S.P.A. Optical weft sensor for air jet weaving looms
EP0212727A1 (fr) * 1985-08-26 1987-03-04 Picanol N.V. Détecteur optique de fil de trame pour métiers à tisser avec un peigne en forme de U
US4716942A (en) * 1985-08-26 1988-01-05 Picanol N.V. Optical weft stop motion for looms with a U-shaped reed

Also Published As

Publication number Publication date
US4565224A (en) 1986-01-21
CH659672A5 (de) 1987-02-13
EP0109929A3 (fr) 1985-08-28
JPS5988950A (ja) 1984-05-23

Similar Documents

Publication Publication Date Title
EP0109929A2 (fr) Détecteur de fil de trame
DE2236434C3 (de) Implantierbares elektromedizinisches Reizstromgerät
DE2513356C3 (de) Photoelektrischer Schußfadenwächter
EP0184254B1 (fr) Circuit de discrimination des deux trames d'un signal de télévision
DE2653633C2 (de) Vorrichtung zum Erfassen eines fehlerhaften Schußfadeneintrages bei einer Webmaschine
CH630126A5 (de) Elektronischer fadenwaechter fuer eine webmaschine mit ortsfester schussgarn-vorratsspule.
DE2220786A1 (de) Positionsfuehlvorrichtung
DE3335656C2 (de) Vorrichtung zur fotoelektrischen Überwachung einer Kettenwirkmaschine
DE69022662T2 (de) Pulsmeter.
DE2803182C2 (de) Elektronischer Schußfadenwächter für schützenlose Webmaschinen
DE2543045C3 (de) Elektrische Überwachungsvorrichtung für das Webfach einer Webmaschine
CH622561A5 (fr)
DE2644793A1 (de) Herzschrittmacher
DE1937246A1 (de) Nadelwaechter einer Rundstrickmaschine
DE3046260C2 (de) Vorrichtung zur automatischen Nahtkontrolle an Doppelkettenstich-Nähmaschinen
DE2456036B2 (de) Dokumentenfeststellvorrichtung
DE2518371A1 (de) Elektronische vorrichtung zur kontrolle der schussfadeneintragung in webmaschinen
DE3335875A1 (de) Verfahren und vorrichtung zur ueberwachung der fadenspannung eines elastischen fadens
DE2256930B2 (de) Schaltungsanordnung für eine zur Auslösung von Uberwachungsaufgaben und/ oderSteuerfunktionen dienende Infrarot-Lichtschranke
DE4300581C2 (de) Vorrichtung zur fotoelektrischen Überwachung
DE2329937C3 (de) Strahlenschranke
DE3028476A1 (de) Verfahren zum ueberwachen einer wirkmaschine auf unregelmaessigkeiten im fadenzulauf und vorrichtung zu dessen durchfuehrung
DE2050508C2 (de) Vorrichtung zur Überwachung einer Reihe von Fadenstellen einer Spinn- oder Zwirnmaschine auf Fadenbruch
AT353716B (de) Photoelektrischer schussfadenwaechter
DE3142977C2 (de) Eigensicherer Flammenwächter

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

AK Designated contracting states

Designated state(s): BE DE FR IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE DE FR IT SE

17P Request for examination filed

Effective date: 19850913

17Q First examination report despatched

Effective date: 19861021

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19900911

R18W Application withdrawn (corrected)

Effective date: 19900911

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DE COI, BEAT

Inventor name: KELLER, HANS PETER