EP0799915B1 - Procédé et appareil pour la régulation de ruban dans une machine de cardage - Google Patents

Procédé et appareil pour la régulation de ruban dans une machine de cardage Download PDF

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Publication number
EP0799915B1
EP0799915B1 EP97810174A EP97810174A EP0799915B1 EP 0799915 B1 EP0799915 B1 EP 0799915B1 EP 97810174 A EP97810174 A EP 97810174A EP 97810174 A EP97810174 A EP 97810174A EP 0799915 B1 EP0799915 B1 EP 0799915B1
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EP
European Patent Office
Prior art keywords
speed
feed roller
carding machine
machine according
doffing cylinder
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EP97810174A
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German (de)
English (en)
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EP0799915A2 (fr
EP0799915A3 (fr
EP0799915B2 (fr
Inventor
Jürg Faas
Christian Müller
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/62—Slubbing-winding apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions

Definitions

  • the invention relates to a method and an apparatus for band regulation for a Carding machine, that is, a machine that a drum equipped with a set (also Called drum), the clothing of the drum with around the circumference of the Distributed working elements (e.g. revolving cover) works together to create a To achieve carding effect.
  • a Carding machine also includes a material feed e.g. with a breeze - also called a licker-in - and a speed-controllable one Feed roller and a so-called outlet, which includes a customer, which a nonwoven takes over from the drum and passes it on.
  • the invention relates to a method and an apparatus for controlling a Card during a so-called "transient" phase, i.e. during a period where the outlet speed changes.
  • transient phase i.e. during a period where the outlet speed changes.
  • Examples of such phases are the start-up phase when starting, the braking phase when switching off and the corresponding Acceleration phases (positive and negative) when changing the can.
  • the basic object of the invention is to control the process during a To improve the transient phase in such a way that band breaks can be avoided.
  • a secondary task (the preferred solution) is to do this in this way improve that regulation is also used during the transient phase can be.
  • a known known revolving card e.g. the card C50 the Applicant, shown schematically.
  • the fiber material is in the form of dissolved and cleaned flakes fed into the filling shaft 20 by a breeze 32 (FIG. 3) (also called pioneer) adopted as a wadding, a drum (or Drum) 40 and through the cooperation of the drum with a Moving cover set 52 dissolved and cleaned.
  • the covers of the revolving cover set 52 through a suitable drive system of the revolving cover unit Deflection rollers along a closed path (in the same direction or in the opposite direction to Direction of rotation of the drum).
  • Nonwovens are removed by a customer 70 and in a different one Rolling existing outlet section 80 formed into a sliver 90.
  • This Carding tape 90 is transferred from a tape storage (not shown) into a transport can cycloidal turns.
  • Figure 2 shows schematically a computer 4 with input and output signals. Signals are entered from two sensors B5 and B6, which are described in more detail below are explained, as well as signals which, among other things, the speed of the Card sliver at the outlet (Va) and various data such as Setpoints for Show tape weight.
  • the basic principle of conventional belt regulation is based on two measures, namely a "long-term” regulation and a regulation with "Short-term addition" at the inlet, where disturbances are balanced at the time of feeding should be. According to this invention, a third measure is taken, however is only explained after an explanation of the conventional system.
  • a sensor B5 detects which is on a feed trough 6B is arranged, the unevenness of the weight of the incoming Watt template. These correspond to the deflections of the pivoted Feed trough opposite the feed roller 6A (see also FIG. 3).
  • the sensor B5, as in 1 shows the computer 4 a cross-section-dependent signal 6. Die Electronics influence the drive motor with the signal 7 via a control unit 8 (not shown) of the feed roller 6A and thus the speed of the feed roller.
  • the further sensor B6 shown in FIG. 1 scans the card sliver that is running out and delivers an electrical signal 2 dependent on the belt weight to the regulation (the Computer) 4.
  • a funnel 13 see Fig. 5, this is the tape take-off leaving card sliver to the nip point of two step rollers 11, 12.
  • the lower roller 12 is driven, the upper roller 11 is spring-loaded Lever can be moved vertically.
  • This roller is driven by the card sliver that runs out and the stroke of the roller 11 (shown from the distance L between the axes of the 4) corresponds to the thickness of the card sliver.
  • After one The new strip must break the strip again through the hopper 13 between the rollers 11, 12 are threaded and forwarded to the tape storage. This takes place at a relatively low, constant delivery speed (in "creep speed").
  • An actual value is the input signal 2 to the computer 4 regardless of the Run-out speed read in and with the previously entered in the electronics Belt weight setpoint compared, cf. also Fig. 2.
  • the speed of the feed roller is influenced by the control accordingly to the strip weight in the outlet to keep constant.
  • the sensor B5 delivers measured values, which are processed by the computer 4 for the "Short-term supplement” are used while the sensor B6 delivers measured values from the Computer 4 can be used to implement a "long-term regulation".
  • long-term regulation the "dead time” of the controlled system be taken into account, i.e. the time that passes after a change to the Feed roller is carried out until the corresponding effect at the measuring point (on Sensor B6) appears. This dead time in the card is so long that the Long-term regulation only used for "keeping numbers” (to avoid drift) becomes.
  • the dead time from the feed roller 6A to the measuring point B6 is related to this invention is of minor importance. But there is a corresponding one (somewhat shorter but still considerable) dead time from the feed roller 6A to Transition point from the drum 40 to the customer 70. The latter dead time is of central importance in connection with the invention, is in the Description of Figures 7, 8 and 9 used.
  • the outlet speed is changed when a setpoint is changed (i.e. during a transient phase, e.g. by a control loop during start-up or during run-down controlled. This serves the speed of the phase-out motor 50 in FIG. 6 accordingly adjust.
  • the initiator (FIG. 1) on the stepped rollers 11, 12 supplies the computer 4 Impulse. These are converted into the speed at the outlet (V outlet). This speed is compared with a predetermined runout speed, See FIG. 2.
  • the resulting manipulated variable 60 is sent to the frequency converter 30 in FIG given.
  • the known band regulation only works after the operating state has been reached provided that this condition has a runout speed greater than 50m / min required. Below 50 m / min, as well as when starting up and braking automatically switched to unregulated operation, i.e. the short term supplement and the Long-term regulation are inactive. This is where the invention begins. It affects one Belt regulation for use during the run-up and run-down phases of the Delivery speed.
  • the invention is initially based on the Diagrams of Figures 7, 8 and 9 explained.
  • the first two sections of the course are the same in all diagrams (i), (ii) and (iii), i.e. at the first acceleration (section a) until the end of the creeper phase (Section b) where threading at constant (low) exit speed takes place. In all three cases there is a constant ratio between the speed the feed roller and that of the customer. In the state of the art (Diagram i) the same ratio when accelerating further from the Maintain crawl speed up to operating speed (section c).
  • Fig. 8 is a timing chart for the rate of increase of a carding machine in the so-called through phase, e.g. in the phase where the different Rollers have not yet reached their operating speed after switching on the machine to have.
  • the curves S and A show the increasing speed of the feed roller 6A and pickup 70, T and V curves the increasing speed of the Drum 40 and licker 32.
  • the through phase mentioned above is e.g. on the abscissa between the time values T2 and T3 visible for the feed roller and the customer. Also a Braking is a through phase, such as. B. on the above The abscissa between time values T4 and Te is shown for the drum and the licker-in is.
  • Fig. 8 also shows the order in which the individual rolls of a card are usually turned on.
  • EP-A-701 012 it is known to insert a separate asynchromotor for the feed roller 6A into the card others for the drum 40 (this also becomes the breeze and revolving cover driven) and a separate asynchromotor for the outlet 80 (inclusive customer 70) to be provided.
  • a separate asynchromotor for the feed roller 6A into the card others for the drum 40 (this also becomes the breeze and revolving cover driven) and a separate asynchromotor for the outlet 80 (inclusive customer 70) to be provided.
  • FIG. 8 it can also be seen from the diagram in FIG. 8 that in Time T2 on the abscissa, in which feed roller and customers start the Drum and the licker in (or at least near) the Operating speed.
  • FIG. 9 shows schematically and simplified the effect of Dead time in the formation of a card sliver from a template during a transient Phase.
  • I, II and III indicate the sections of the fiber flow on the feed roller (6A), the licker-in and the drum (32, 40) and the outlet (80).
  • the effect of the default i.e. the Differences in speed from roll to roll
  • the effects shown are only those of the speed changes in the Run-up processes.
  • the feed roller gives the licker-in and the spool a non-woven fabric (from a wad of cotton) with a thickness D at any time during start-up, for example at time Tw (FIG. 8).
  • 9 now represents a "snapshot" of the fiber flow through the card at the same time Tw.
  • the thickness of the fiber layer corresponds to the time Tw the transition point to the customer is not D but D1 (D 1 ⁇ D).
  • This lower thickness corresponds to the fleece, which was delivered by the feed roller to the licker-in 32 at an earlier point in time Tw-Tz, but which only becomes effective at the point of transition Tw to the customer 70.
  • the pickup (according to FIG. 8) ran at such a speed that it could take over and forward a fiber layer corresponding to the thickness D1 from the drum.
  • Tw time Tw
  • it is already running at a higher speed.
  • the rapidly rotating customer "tries” to take off more material than is made available to him. This forms a thin band at the outlet, the weight of which is below the intended weight, see curve K2 in FIG. 10.
  • a similar (but inverse) problem arises in the braking phase, cf. right side of the diagram in Fig. 10, where too thick a card sliver is produced, as will be explained in more detail below.
  • Delay time (technically called “dead time"), which (on average) is one Fiber needs to get from the feed roller to the customer.
  • Fig. 10 represents a run-up and braking curve K1 for the speed of the belt and represents a curve K2 for the strip thickness.
  • the speed VA is on the left ordinate of the tape, on the right ordinate the tape weight in ktex, on the Abscissa the time of the start-up process or the brake-running process. Furthermore, that is Setpoint or setting value for the strip thickness entered. As can be seen, it follows here for the ramp-up, i.e. from a tape speed in the area 15m / s up to the operating speed an undesirable banding where a band below the setpoint is produced. From the right side of the Diagram shows that an undesirable (too thick) tape is produced.
  • FIGS. 11 and 12 Two solution variants are proposed, which are based on FIGS. 11 and 12 can be explained. In these figures only the solutions for the startup are shown shown, whereby these solutions can be adapted to the draft.
  • the first embodiment sees a mutual adjustment of the speeds the rollers at the inlet and outlet.
  • the ramp up of the The speed of the customer 70 in the outlet is compared to the run-up Speed of the feed roller 6A in the inlet shifted such that the customer 70 starts running up at a later time. So that the feed roller 6A deliver more material to drum 40 in the critical period of startup can. This prevents that at any point in time Removing a fleece from the drum surface, there is a layer of material with a smaller thickness than that of the same time effective speed of the customer corresponds. Rather, it becomes a layer of material of sufficient thickness so that no diluted fleece on the Is handed over to the customer.
  • Figure 10 is the deceleration with curves VE and VA shown.
  • Curve VE shows the increase in speed at the inlet, curve VA the Increase in speed at the outlet.
  • the speed VE starts at Increase time TI until it reaches its intended size at time TIII (in Normal operation of the machine).
  • the speed VA begins to increase to rise at a later time TII and thus also at a later time Time TIV your intended size. This results in a delay TI, TII the abscissa t.
  • the adjustment begins the speeds of the two rollers first at time TI (not at time T0), since the time period T0-TI for threading the fuse in the area of the funnel is needed.
  • FIG. 12 Another embodiment (Fig. 12) of the invention resides in that in the critical Phase the speed (VE) of the feed roller 6A compared to that VA of the Customer 70 is accelerated more.
  • This process is illustrated in FIG. 12 explained. Unlike the process shown in FIG. 11, the process begins Influencing the speed of the two rollers at the inlet and outlet to the same time TG. During the speed of the feed roller to this Time increases sharply, however, the acceleration of the customer in the Time interval TG-TG1 relatively slow, i.e. it only starts strong at time TG1 to increase.
  • this diagram also shows that regulation the feed roller at a belt exit speed of approx. 0.15 m / min is carried out and that of the customer at a speed in the range of about 15 m / min. This process is carried out in such a way that from the computer 4 to same time TG signals 7 and 60 to the drive motors of the two rollers go. The slopes of the two driving curves are pre-programmed.
  • the processes according to FIGS. 11 and 12 are also for the Adaptation phase.
  • the computer 4 solves the slowdown of the Customer 70 (of the outlet 80) at the time when the slowdown of the Feed roller begins, the steepness of the "braking curve" for the feed roller being higher than the steepness of the braking curve is chosen for the runout.
  • the rollers of the outlet 80 are matched to one another such that the Transition from the drum 40 to the doffer 70 formed nonwoven at the transition to the subsequent roller (take-off roller) practically completely from the customer removed and then passed on as a fleece until this fleece forms a band 90 is merged.
  • the rollers of the inlet are in a corresponding way matched to each other, so that from the feed roller 6A from the cotton wool peeled nonwoven at each transition is passed on as a nonwoven until the fibers get on the drum 40.
  • a predetermined tape weight requires a corresponding fleece thickness on the Customer.
  • the two parameters mentioned must can be coordinated with one another, as shown in FIGS. 9 and 10 for the case of Ramp-up was explained.
  • the faster buyer has the "few” the fibers made available to him warped too much and thus diluted what to can lead to a crack.
  • a "too slow" towing device causes a traffic jam in the Fiber flow, which can lead to constipation.
  • the outlet speed must be at a predetermined one Time Tk first from the value for normal operation to a lower value be reduced and then increased again to the operating speed, e.g. to be able to change the can. From a certain point in time is the setpoint for the outlet speed according to a predetermined "Braking ramp” reduces, causing the pickup 70 to decelerate immediately. However, the drum 40 runs at an undiminished speed (Peripheral speed) further. In addition, the drum 40 carries one Fiber layer to the pickup 70 by the feed roller 6A at a time (Tk-Tz, see Fig. 8) was fed. The speed of the feed roller is of course also discontinued at time Tk. However, this change may occur at the time because of the Dead time does nothing at the transition to the customer.
  • the outlet speed is again increased in order to restart the card to the target production (operating state).
  • the ratio of the peripheral speed of the customer compared to The peripheral speed of the drum is increased, the customer takes one lower proportion of the fiber covering from the drum, this fiber covering from for the reasons mentioned compared to the operating state.
  • the fat of the fiber covering on the customer decreases again.
  • the long-term regulation can do this Do not counteract effect due to dead time.
  • the Control algorithm of the long-term controller in the software or programming of the Computers 4 realizes
  • the Control algorithm of the long-term controller normally an integral part. Have so far Fiber flow changes during a transient phase with this Integral part of the algorithm interacts that the occurring error for the time being is rather enlarged before it can then be corrected.
  • the Long-term control has therefore so far been during the run-up and run-down phases (i.e. during transient phases) have been switched off since they compensate for the fluctuations of the Belt weight not corrected, but rather a compensation difficult.
  • the thickness of the fiber covering on the Drum changed in time so that the subsequent influence of a (transient) Change of outlet speed on the belt weight (on the decrease of Fibers from the drum) is at least partially balanced.
  • the exact Pilot control characteristics must depend on the details of the Card construction (empirically) be determined i.e. depending on the effective dead time feed roller ⁇ take-off point and from the effective change of the "Collective performance" of the customer for a given change in his speed. Since these factors themselves depend on other operating parameters (e.g. on the effective Operating number of the drum) (see e.g. DE-C-3143285) must if necessary, additional effects in the programming are taken into account, whereby the complexity of the system should preferably not be increased unnecessarily (Only those parameters should be considered that have a noticeable impact exercise).
  • the invention By means of this feedforward control it is easily possible to keep the fiber flow during the To improve transient phases in such a way that band breaks can be avoided.
  • the invention also enables a further improvement - the fiber flow can be stabilized in such a way that long-term regulation is also possible in the event of a transient Phase no longer has a disruptive effect but an improvement in Band uniformity causes.
  • the computer 4 can therefore be programmed that the long-term regulation already during the ramp-up (after the completion of the Creeper) is switched on and when braking to a corresponding Outlet speed remains switched on. Long-term regulation remains active during can change.
  • An improvement in tape uniformity can e.g. can be achieved in that the long-term regulation is activated from an outlet speed of approx. 35 m / min can be.
  • the present invention is in no way limited to the above, for example only mentioned embodiments.
  • the controller (the computer) 41 can be programmed to: detects an upcoming transient phase (e.g. by changing the setpoint for the outlet speed) and a corresponding feedforward control of the fiber flow by controlling the feed roller speed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (17)

  1. Un procédé pour la commande d'une carde avec un peigneur et un cylindre d'alimentation, qui présentent chacun un entraínement contrôlé, caractérisé par un tracé non linéaire du rapport entre le régime du cylindre d'alimentation et celui du peigneur pendant au moins une phase transitoire.
  2. Une carde avec un peigneur (70), un cylindre d'alimentation (6A), un entraínement pour le peigneur et pour le cylindre d'alimentation et une commande (4) pour les deux entraínements, caractérisée en ce que la commande (4) est conçue de telle façon qu'elle induit un tracé non linéaire du rapport entre le régime du cylindre d'alimentation (6A) et celui du peigneur (70) pendant au moins une phase transitoire.
  3. Une carde selon la revendication 2, caractérisée en ce que le tracé non linéaire induit une pré-commande du flux de fibre par rapport à une variation imminente de la vitesse de sortie pendant la phase transitoire.
  4. Une carde selon la revendication 2 ou 3, caractérisée en ce que la phase transitoire comprend l'accélération de la carde, par exemple à partir de la vitesse lente, et la commande (4) est pourvue d'un programme de commande pour l'accélération.
  5. Une carde selon la revendication 2 ou 3,caractérisée en ce que la phase transitoire comprend le ralentissement de la carde, par exemple jusqu'à l'arrêt, et la commande (4) est équipée d'un programme de commande pour le ralentissement.
  6. Une carde selon la revendication 2 ou 3, caractérisée en ce que la phase transitoire comprend aussi bien le ralentissement que l'accélération successive et la commande (4) est équipée d'un programme de commande pour cette opération, par exemple pour le changement de pot.
  7. Une carde selon l'une quelconque des revendications 2 à 6, caractérisée en ce qu'un capteur (B6) est prévu pour le poids de bande et l'alimentation en fibre est commandée par un régulateur en fonction des valeurs mesurées de ce capteur.
  8. Une carde selon la revendication 7, caractérisée en ce que le régulateur travaille selon un algorithme de régulation qui comprend une fraction d'intégrale.
  9. Une carde selon la revendication 7 ou 8, caractérisée en ce que le régulateur est désactivé par la commande (4) en cas de vitesses de sortie inférieures à une limite prédéfinie.
  10. Une carde selon la revendication 9, caractérisée en ce que le régulateur est activé pendant une phase transitoire.
  11. Carde avec un cylindre d'alimentation, un peigneur et une commande, caractérisée en ce que le cylindre d'alimentation est commandé par rapport au peigneur de telle sorte que les phénomènes transitoires, qui surviennent lors de l'accélération ou du ralentissement, sont compensés au moins en partie lors de la formation de ruban.
  12. Carde qui présente un cylindre d'alimentation (6A) et un peigneur (AU), dont la vitesse est influencée par un ordinateur 4 dans des phases de passage, caractérisée en ce que la vitesse des deux cylindres est réciproquement adaptée lors de l'accélération ou du ralentissement.
  13. Carde selon la revendication 12, caractérisée en ce que l'accroissement de la vitesse du peigneur est retardé par rapport au cylindre d'alimentation.
  14. Carde selon la revendication 13, caractérisée en ce que la temporisation est effectuée à partir de la vitesse lente, par exemple dans le cas d'une vitesse de sortie du ruban dans la plage de 15 m/min.
  15. Carde selon la revendication 7, caractérisée en ce que des signaux adaptés à partir d'un ordinateur (4) sont envoyés aux moteurs d'entraínement du cylindre d'alimentation (6A) et du peigneur (AU).
  16. Carde selon la revendication 15, caractérisée en ce qu'un signal pour la modification de la vitesse du cylindre d'alimentation (6A) est envoyé d'abord à l'instant T1 à l'entraínement du signal d'alimentation et un signal est envoyé ensuite au peigneur à l'instant TII.
  17. Carde selon la revendication 15, caractérisée en ce qu'un signal pour influer sur la vitesse du cylindre d'alimentation (6A) et du peigneur (AU) est envoyé au même instant (TG), sachant que la vitesse du cylindre d'alimentation (6A) est fortement modifiée à cet instant et que la forte accélération ou le fort ralentissement du peigneur est retardé de l'intervalle de temps TG-TG1.
EP97810174A 1996-04-05 1997-03-25 Procédé et appareil pour la régulation de ruban dans une machine de cardage Expired - Lifetime EP0799915B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH87296 1996-04-05
CH872/96 1996-04-05
CH87296 1996-04-05

Publications (4)

Publication Number Publication Date
EP0799915A2 EP0799915A2 (fr) 1997-10-08
EP0799915A3 EP0799915A3 (fr) 1998-05-13
EP0799915B1 true EP0799915B1 (fr) 2002-07-17
EP0799915B2 EP0799915B2 (fr) 2007-03-07

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EP (1) EP0799915B2 (fr)
DE (1) DE59707702D1 (fr)

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US6581248B1 (en) * 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet
AU3807999A (en) * 1998-05-13 1999-11-29 Maschinenfabrik Rieter A.G. Machine for processing a textile material and comprising a drawing system
AU2001285600B2 (en) * 2000-09-08 2006-10-12 Commonwealth Scientific And Industrial Research Organisation Fluid mixer
CN106757553A (zh) * 2016-12-24 2017-05-31 卓郎（常州）纺织机械有限公司 一种梳理机生产中断再启动被加工材料接续不中断的方法
CN109402800A (zh) * 2018-12-24 2019-03-01 经纬纺织机械股份有限公司 一种梳棉机生条不断头的方法
DE102020104475A1 (de) 2020-02-20 2021-08-26 Trützschler GmbH & Co Kommanditgesellschaft Verfahren zum Erzeugen eines Faserbandes und Karde

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JP2848405B2 (ja) * 1989-09-14 1999-01-20 豊和工業株式会社 カードにおけるスライバ斑制御装置
DE9007406U1 (de) * 1990-03-21 1991-08-22 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum Abbremsen einer umlaufenden Walze, z. B. Trommel, an einer Spinnereivorbereitungsmaschine, z. B. Ballenöffner, Reiniger, Karde oder Krempel
DE9103127U1 (de) * 1990-03-21 1991-08-29 Trützschler GmbH & Co KG, 41199 Mönchengladbach Vorrichtung zum Abbremsen einer umlaufenden Walze, z.B. Trommel, an einer Spinnereivorbereitungsmaschine, z.B. Ballenöffner, Reiniger, Karde oder Krempel
DE4018803A1 (de) * 1990-06-12 1991-12-19 Rieter Ag Maschf Verfahren und vorrichtung zur regelung eines oeffnungsvorganges, beispielsweise an einer karde
US5152033A (en) * 1991-07-15 1992-10-06 Myrick-White, Inc. Textile apparatus/method for reducing variations in silver weight
DE4332329B4 (de) * 1992-11-07 2005-10-20 Truetzschler Gmbh & Co Kg Vorrichtung an einer Karde für Textilfasern, z. B. Baumwolle, Chemiefasern u. dgl., zur Produktionssteuerung
DE59510122D1 (de) * 1994-09-08 2002-05-02 Rieter Ag Maschf Verfahren und Vorrichtung zum Steuern der Antriebe einer Kardiermaschine oder eines Krempels
EP0984088B1 (fr) * 1996-02-15 2002-09-18 Maschinenfabrik Rieter Ag Appareil de réglage dans une machine de cardage

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EP0799915A2 (fr) 1997-10-08
DE59707702D1 (de) 2002-08-22
EP0799915A3 (fr) 1998-05-13
US5915509A (en) 1999-06-29
EP0799915B2 (fr) 2007-03-07

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