EP0303023B1 - Eine faserverarbeitende Anlage und Verfahren zu dessen Steuerung - Google Patents

Eine faserverarbeitende Anlage und Verfahren zu dessen Steuerung Download PDF

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Publication number
EP0303023B1
EP0303023B1 EP88109626A EP88109626A EP0303023B1 EP 0303023 B1 EP0303023 B1 EP 0303023B1 EP 88109626 A EP88109626 A EP 88109626A EP 88109626 A EP88109626 A EP 88109626A EP 0303023 B1 EP0303023 B1 EP 0303023B1
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EP
European Patent Office
Prior art keywords
fibre
flock
machines
installation
fan
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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.)
Revoked
Application number
EP88109626A
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German (de)
English (en)
French (fr)
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EP0303023A1 (de
Inventor
Christoph Staeheli
Urs Staeheli
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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    • 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
    • D01G23/08—Air draught or like pneumatic arrangements

Definitions

  • This invention relates to a fiber processing installation or to a method for controlling a fiber processing installation according to the preamble of claims 1 and 10 in particular (but not exclusively) on cards or cards.
  • Pneumatic systems for feeding fiber flakes to a plurality of cards in a spinning mill have been in practical use for more than 25 years.
  • DOS 3442942 This DOS indicates systems which were known even earlier, in which the air volume and / or the air speed were set as a function of party-specific data or on the number of processing cards. However, such adjustments required a certain amount of effort, since they would have to be carried out by replacing the V-belt pulleys on the transport fan and its drive motor.
  • the registration company of DOS 3442942 therefore wanted to patent the automation of the adjustment of the air volume or air speed.
  • a control should determine the number of cards to be fed directly or indirectly and set the operating point (the speed) of the transport fan accordingly.
  • the air pressure in the system, the air volume, the air speed and the number of connected cards are to be determined by the control and the speed of the transport fan is changed accordingly, the question how the determined variables are to be processed in the control is not dealt with in this DOS.
  • the control device which controls the transport fan is intended to work together with a control device, "which regulates the amount of fiber flakes supplied". No further details of this arrangement can be found in the DOS.
  • the state of the art also includes the proposal published in DOS 2435677 (and in US equivalent 4353667), according to which the quantity of flakes supplied can be determined by measuring e.g. the static pressure at the outlet of the fan is first determined and then regulated. The system is not arranged to react to a change in the system structure. In addition, this proposal provides for a continuous variation in the production of the food machine, which is not readily desirable.
  • the "current production” of a food machine during stop-go operation is either the (adjustable) maximum production (Pm - machine switched on) or zero (machine switched off). Where the word “production” is used in the description below without qualifying it refers to the maximum production Pm currently set.
  • the "effective production" of the food processor during stop-go operation depends on the maximum production Pm set and on the ratio of running time / lactation, for example with a ratio of running time / lactation of 9: 1 the effective production is 90% of the maximum production Pm.
  • the (maximum) production can be adjusted by changing the speed of the working elements of the food processor. It is known (Aerofeed F systems from Maschinenfabrik Rieter AG) to automatically adapt this production to the number of cards allocated to the food processor.
  • the (flake) supply (or supply) can be regarded as the above-mentioned effective production in stop-go operation and is controlled in normal stop-go operation (with a fixed maximum production Pm) via changes in the runtime / lactation ratio .
  • This is done depending on the filling conditions in the filling chutes of the connected cards, but normally the food processor control does not receive any information directly from level sensors in the chutes themselves. Rather, the control must respond to a selected operating parameter (e.g. the static pressure in the feed channel), which represents an "average" of the filling conditions in all connected filling shafts.
  • a selected operating parameter e.g. the static pressure in the feed channel
  • the current production of the food machine can be regulated depending on the filling conditions in the filling shafts.
  • the conveyor system preferably comprises a feed channel, means for generating an air flow in this channel and means for supplying flakes in the channel.
  • feed channel here refers to the connection between the connected fiber processing machines and the flake or air supply means supplying them.
  • a pipe is connected to two food machines and is provided with separating means in order to determine the allocation to the food machines, the duct sections from the respective food machines to the separating means each represent a "feed channel”.
  • the supply of flakes or the current production of the food machine is regulated depending on an operating parameter.
  • the static pressure in the feed channel upstream of the first fiber processing machine is preferably selected as the operating parameter.
  • other, correspondingly changing parameters can be selected, for example the drive torque required for driving a fan or the instantaneous value of the power of the fan drive, which have been mentioned in US Pat. No. 4,353,667 as alternatives for measuring the static pressure.
  • the air quantity mentioned in DOS 34 42 942 can also be selected as the operating parameter.
  • a means for generating an air flow is preferably driven continuously during normal operation, but the air supply can either adapt itself automatically to the conveying conditions or can be controlled.
  • the means determining the target value can define a target range with an upper and a lower limit, so that the delivery means is switched on when the instantaneous value of the parameter is a limit of the range, and is switched off when the instantaneous value of the parameter reaches the other limit of the range.
  • the target range therefore corresponds to "acceptable" filling conditions in connected filling shafts. Exceeding one or the other limit indicates “unacceptable” conditions (too high or too low), which requires a corresponding change in the state (stop or go) of the feed machine.
  • the delivery means can then work under predeterminable conditions, which makes it easier to maintain constant quality in the end product.
  • the production of the delivery means during the switch-on phase can be determined independently of changes in the mentioned operating parameter.
  • This "total production" of the delivery means can be determined as a function of the total number of fiber processing machines coupled to the feed channel, regardless of whether all these machines are currently in use. Means for determining the number of machines coupled to a feed channel are already known, e.g. from the aforementioned DOS 3442942 and in connection with the aforementioned Aerofeed F systems, and can be used to adjust the total production of the delivery means.
  • the system shown as an example in FIG. 1 comprises a so-called "strand" of a total of eight cards 20.
  • a common feed channel 22 runs over these cards.
  • the cards are arranged in two rows and the feed channel is therefore U-shaped, but such an arrangement is irrelevant to this invention.
  • a fan 24 or 26 delivering conveying air is coupled to each end of the transport line 22.
  • Each fan 24 or 26 is assigned a respective feed machine 28 or 30 for the delivery of fiber flakes.
  • Each card 20 is assigned a respective filling shaft 32, which receives flakes from the channel 22 and it delivers as a cotton wool to the corresponding card 20.
  • the air flow path between duct 22 and exhaust system 34 is described in our European patent application no. 176668, which description is also included in this application.
  • the carding strand shown in FIG. 1 can be separated into two so-called "lines" by suitable separating means.
  • suitable release agents for this are described in our European patent application no. 175056, but also in DOS 3442942, although other suitable release agents were also used in the above-mentioned Aerofeed F systems.
  • the release agents After the release agents have been set accordingly, one card line with flakes from the feed machine 28 and the other card line with flakes from the feed machine 30 can be put into operation, the number of cards per line can be adapted to the production conditions of the spinning mill.
  • FIGS. 2 and 3 we refer to only one line, namely that which is fed with flakes from the feeder 28. What is said for this line also applies to the other line of the overall system.
  • the schematically indicated separating agent T has separated the card strand in two lines of four cards each, so that the cards 201, 202, 203 and 204 together with the corresponding duct piece 221 have been assigned to the fan 24 and the feed machine 28.
  • the line delimited in this way offers the fan 24 a certain flow resistance, which is expressed in a determinable static pressure on a measuring device M in the channel 22 between the fan 24 and the first card 201.
  • this newly defined line offers the fan 24 one other, higher flow resistance, which manifests itself in an increased static pressure on the measuring device M.
  • the static pressure P at the outlet of the fan is connected to the amount of air Q conveyed via the characteristic curve (FIG. 3) of the fan.
  • the fan 24 With the higher flow resistance of the system (higher static pressure on the measuring device M), the fan 24 promotes a relatively low amount of air, e.g. Operating point A.
  • the fan 24 At unchanged speed n, but greatly reduced resistance (static pressure), the fan 24 promotes a significantly higher amount of air, e.g. Operating point X.
  • This behavior of the fan 24 can be adapted to the conditions in the line, since a larger number of cards in the line means a reduced flow resistance (static pressure), but at the same time requires an increased amount of air. So it’s not necessary perform the required adjustment of the air volume by a corresponding shift in the characteristic curve of the fan (for example, for an increase in the air volume, by a corresponding increase in the speed of the fan from n to N, as indicated by dashed lines in FIG. 3).
  • the "definition" of the line connected to the fan determines the static pressure at the outlet of the fan and thereby the amount of air conveyed by the fan without further action.
  • a system according to FIGS. 2 and 3 has another advantage - it can not only adapt to the "definition" of the line, but also to the current operating conditions in this line, provided that a Significant change in operating conditions (e.g. failure of a card) leads to a corresponding change in flow resistance (static pressure) in the system.
  • a Significant change in operating conditions e.g. failure of a card
  • flow resistance static pressure
  • Fig. 4 The line shown in Fig. 4 is similar to that of Fig. 2, but is greatly simplified to facilitate the explanation of the basic principles. After these principles have been clarified, their application for more complex systems, for example according to FIGS. 1 and 2, will also be clear.
  • FIG. 4 This comprises a feed machine S, a fan V, a feed channel K, two cards C1 and C2, each with a filling shaft (not indicated), a microprocessor control ⁇ P and a controllable drive A for the feed machine S.
  • a measuring device M is in the channel K between the Fan V and the first card C1 installed to measure the static pressure. It delivers an output signal to the microprocessor ⁇ P.
  • Each card C1 or C2 delivers a signal to the microprocessor ⁇ P to show whether this card is currently in operation or not.
  • the microprocessor control ⁇ P delivers a control signal to the drive A of the food processor S.
  • the fan drive not shown, cannot be controlled by the control ⁇ P. In operation, it runs at a constant speed n, which corresponds to a specific characteristic (FIG. 5).
  • the control system should cooperate with the other elements in such a way that the filling chute of each card being produced remains “full” (within certain tolerances).
  • the static pressure in the channel K in the measuring device M can represent the filling ratios.
  • a given value of static pressure can have different "meanings" for the filling ratios depending on the operating conditions.
  • the upper area B1 corresponds to the operation of the line when only one of the two cards (C1 or C2) is in use.
  • the second card (C2 or C1) does not produce, e.g. due to a breakdown (malfunction), during the can change, to carry out maintenance work or simply because the production of a single card is currently sufficient.
  • the upper limit of the pressure range B1 corresponds to the status "filling shaft full" for the card that is still running (C1 or C2).
  • the lower limit of the same area corresponds to the "Refill required" state for the same card that is still running.
  • the control ⁇ P is arranged in such a way that it switches on the drive A of the food processor when the lower limit of the range B1 is reached and switches off when the upper limit of this range is reached.
  • the lower operating area B2 corresponds to the operation with the two cards C1 and C2 in use.
  • the upper limit of area B2 corresponds to the state "both filling chutes full”.
  • the lower limit of this area corresponds to the state "refill (one or the other or both cards required)".
  • the microprocessor control ⁇ P is designed in such a way that it switches off the food processor when the upper limit of area B2 is reached and when Switches on when the lower limit is reached.
  • control In order to be able to identify the correct switch-off points, the control must have ⁇ P information about the number of cards that are currently in use. The control receives this information e.g. Via the schematically represented signal lines from the respective cards.
  • each work area B1 or B2 depends less on the conveyor system than on the signal system. It is advisable to incorporate a certain hysteresis in the signaling system in order to avoid the constant switching on and off of the feed drive.
  • the minimum acceptable hysteresis is preferably selected, and this will be the same for the two working areas B1 and B2.
  • areas B1 and B2 in FIG. 5 have been kept apart. Overlapping neighboring areas does not play a significant role in practice.
  • the switch-off points P1 and P2 must be determined on a case-by-case basis as a function of the system structure and input to the microprocessor, which can be carried out or preprogrammed by a manually operated input unit E connected to the control unit ⁇ P.
  • the width of the various work areas can also be communicated to the controller in this way. This information is stored in the controller so that it can be called up.
  • Box a indicates a waiting state in which no material is requested because neither of the two cards is running (producing).
  • Box b indicates a new condition, in which at least one card produces (requires material).
  • the control program proceeds to box c, in which the information for the work area B1 or B2 is called up depending on the number of producing cards.
  • Box d indicates a comparison between the signal received by the measuring device M and the data for the currently operative work area B1 or B2. If the pressure Pi determined by the device M is within or below the called working range, the control switches on the feed drive (box e). When the upper limit of this working range is reached, the control switches off the feed drive (box f).
  • step d determines whether Pi is already above the upper limit of the retrieved work area. If it is determined in step d that Pi is already above the upper limit of the retrieved work area, the control initially moves to box f and only to box e when the lower limit of the area is reached. If there is no change in the number of cards to be delivered, the control will continue to move back and forth between boxes e and f in order to switch the supply on and off accordingly.
  • the controller first switches off the food processor drive and either goes to box a (waiting state) or back to box b (determining the number of cards to be delivered).
  • the number of cards to be delivered can be changed at any time, so that, for example, when changing from one to two cards, the operating pressure Pi is already well above the new upper limit P2 when the change is made, and the control accordingly moves from box d to box f for the time being.
  • the control ⁇ P only switches the feed drive A on and off, in this example it has no influence on the speed of the drive, i.e. on the production of the food machine.
  • This production is predetermined for normal operation and kept constant, so that a constant quality (processing of the fibers) is achieved.
  • the discontinued production must be sufficient for the greatest possible "demand” from the connected cards. Normally, a certain "overproduction” is set, so that when all connected cards produce as quickly as possible, there is an efficient relationship between the idle time and the running time of the food processor in stop-go mode, e.g. 90% runtime to 10% downtime. If the number of producing cards is reduced, as already mentioned above, the production of the food machine (during its runtime) remains the same as before, but the runtime / lactation ratio deteriorates.
  • the line contains a separating means T, as indicated by dashed lines in FIG. 4, this separating means can also be connected to the control ⁇ P by a signal line, so that the control is informed of the currently "effective structure" of the line.
  • the separating agent T blocks the feed channel K between card C2 and a third card C3. If this release agent T is rendered ineffective, the card C3 can also be fed from the feed machine S via the channel K flakes, but when all three connected cards produce, the control ⁇ P has a third work area B3 (FIG. 5) for the Operating pressure Pi.
  • each card connected to the system has the same production.
  • the production of the food machine to be set by the control ⁇ P is then a linear function of the number of cards allocated to this food machine. If the different cards have different productions, the production of the food processor to be set is a non-linear function of the number of cards allocated, which can, however, be taken into account when programming the control ⁇ P.
  • the type of control of the food processor drive by the central control ⁇ P can be adapted to the design of the units.
  • the central control could e.g. deliver two different signals to the food processor via respective lines, namely an on / off signal via one line and a signal representing the required speed via a second line. However, these signals could be combined and sent over a single line, e.g. if the signal level is adjusted to the required speed during the on phase.
  • reference numeral 40 indicates the schematically illustrated central control unit for the feeder system of FIG. 1.
  • the signal connections between this center and certain units of a single line of the system are also indicated, namely the line with the feeder 28 and the fan 24.
  • a pressure sensor 36 (for the static pressure) is in the duct section between the fan 24 and the first Card of the line installed and is also connected to the control center 40.
  • Each filling shaft 32 (only one shaft is indicated in FIG. 7) is also connected to the control center by signal lines.
  • each shaft 32 has two separating units assigned to it, one of which is connected upstream of the shaft in the flock transport direction and the other is connected downstream.
  • the settings of the various separation units are monitored to determine whether the unit leaves or blocks the feed channel for the flow of transport air or flakes.
  • a respective initiator can be assigned to each separation unit, which monitors the current position of the main elements of the separation unit.
  • Each shaft 32 is thus assigned two monitoring sensors, which is shown schematically in FIG. 7 by the reference numerals 38, 39 is indicated. These monitoring elements are also connected directly to the control center 40 by a respective signal line.
  • the two connections important for this invention route respective signals from the control center to the feed machine (or to its drive) in order to (1) determine the production of the feed machine and (2) switch the feed machine on and off, as already in connection with Fig. 4 has been described.
  • the additional lines can conduct various status signals (e.g. readiness, malfunction, operation) between the feed machine and the control center.
  • the connections between the fan 24 and the control center 40 only transmit status signals or an on / off signal from the control center to the fan.
  • the speed of the fan cannot be controlled by the central unit and the fan must run continuously during normal operation, whether flakes are conveyed or not.
  • the pressure sensor 36 delivers a signal representing the actual value of the operating pressure to the control center.
  • This signal can be an analog signal or a discrete digital signal, in the latter case the continuously variable actual value for the operating pressure being converted into a sequence of digitally encrypted values by a sampling method.
  • every initiator for example the Initiators 38, 39 (Fig. 7)
  • a signal to the control center 40 which represents the current state of the corresponding separation unit.
  • the control center 40 is able to determine the current allocation of the cards 20 (FIG. 1) to the feeders 28, 30.
  • the operating personnel therefore only have to set the separating units by hand in the conditions suitable for the desired arrangement of the entire system.
  • the allocation thus determined is used by the control center 40 to determine the corresponding production of each food machine 28, 30 and to notify the food machine accordingly.
  • the control center also needs information about the production per card, which can be entered manually by the operating personnel via an input unit 42 of the control center.
  • the control center exchanges 40 status signals with each shaft 32.
  • the signal "shaft in operation" from the shaft to the control center 40 plays an important role in this embodiment because it is decisive for the determination of the currently effective working area (see FIG. 5) for the operating pressure and therefore for the food processor control. Since the filling chutes 32 according to our European patent application No. 176668 are formed, this signal can be obtained by monitoring the position of the flap arranged between the shaft 32 and the exhaust system 34 (FIG. 1).
  • the invention is not restricted to the combination with a filling shaft according to European patent application 176668.
  • the signals for determining the operating conditions of the cards can easily be obtained from other elements, e.g. from the drive of the card taker. As already indicated in the preceding description, where the card and the shaft have been combined to form an operating unit, this signal can be obtained either from the shaft or from the card.
  • control center 40 must receive information about the plant-specific work area (FIG. 5) for the operating pressure. This information could of course also be entered via the input unit 42. However, they are preferably preprogrammed in the control center, it being possible to "shift" the work areas together (to take account of the variability of different systems) by means of an adjustable "system constant". Such a constant is preferably not to be changed via the input unit 42, but rather by means of a specific setting element which can be set during the assembly of the system and does not have to be subsequently adjusted if the system structure is not changed.
  • the invention is not restricted to the details of the described embodiments. In particular, it is not essential to the invention that the amount of conveying air automatically adjusts itself to the number of cards produced. If this air volume is adapted to the operating conditions by changing the speed of the fan, there may not be a corresponding change in the static pressure in the feed channel (see the shift of the fan characteristic from n to N in FIG. 3). Nevertheless, there is a recognizable corresponding change in other operating parameters, e.g. In the performance of the fan by installing suitable sensors (e.g. in the connection between the fan and a power supply, not shown), such changes can be determined by the central control and compared with a work area for this parameter which is dependent on the number of cards produced. The food processor can be switched on and off accordingly.
  • Essential to this invention is a detectable change in a predetermined operating parameter corresponding to a change in the number of machines to be supplied. This change does not necessarily have to be brought about, it can be inherent in the system, as has been described in connection with FIGS. 1 to 3. It has been shown, for example, that in an applicant's Aerofeed U system the operating pressure drops from approx. 650 Pascal to approx. 300 Pascal if the number of tied-up manholes (cards) is increased in a line from one to ten.
  • the pressure measured in the feed channel is used in the preferred variants only to switch the feed machine on and off.
  • the central control it is not absolutely necessary for the central control to receive information about the current operating pressure.
  • a suitable measuring device could e.g. determine yourself whether the operating pressure is within the specified limits or not.
  • the device itself must then be equipped with a suitable, adjustable evaluation, and the setting must be carried out by the control according to the number of machines to be supplied.
  • the on / off signal could then be sent directly from the measuring device to the food processor (without going through the central control).
  • the amount of air delivered must be adapted to a changed structure of the overall system.
  • the amount of air itself thus represents an operating parameter that could be used to determine the necessary adjustment of the flake supply. Measuring the amount of air is more difficult than measuring static pressure, and the latter measurement is therefore preferred if possible.
  • the static pressure cannot be used to generate a clear signal for determining the flake production, it would still be possible to use the measurement of the air volume.
  • the dynamic pressure (instead of the static pressure) could be selected as the operating parameter.
  • the aforementioned separation units are not necessarily manual operable - they could also be set automatically.
  • the production of the cards (to determine the set maximum production Pm of the feed machine) could also be automatically communicated to the control.
  • the supply of flakes (effective production during stop-go operation of the food machine) is regulated on the basis of the recording of the filling ratios in the filling shafts.
  • the filling ratios are not recorded directly, but rather via their effects on a predetermined parameter of the conveyor system, e.g. to the static pressure at the fan outlet.
  • the relationship between this parameter and the fill ratios is a function of the number of producing (i.e. fiber-related) cards.
  • the control characteristics are adjusted accordingly to the number of fiber-related cards.
  • the invention is not restricted to regulating the supply of flakes (in stop-go operation). It can also be used to control the current production in continuous operation. In general, where the regulation of the flake feeding is carried out on the basis of changes in a given operating parameter, and this parameter itself depends on the number of fiber-related machines, this invention is used.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • General Preparation And Processing Of Foods (AREA)
EP88109626A 1987-08-12 1988-06-16 Eine faserverarbeitende Anlage und Verfahren zu dessen Steuerung Revoked EP0303023B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH310987 1987-08-12
CH3109/87 1987-08-12

Publications (2)

Publication Number Publication Date
EP0303023A1 EP0303023A1 (de) 1989-02-15
EP0303023B1 true EP0303023B1 (de) 1996-10-23

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EP88109626A Revoked EP0303023B1 (de) 1987-08-12 1988-06-16 Eine faserverarbeitende Anlage und Verfahren zu dessen Steuerung

Country Status (5)

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US (1) US4940367A (enrdf_load_stackoverflow)
EP (1) EP0303023B1 (enrdf_load_stackoverflow)
JP (1) JPS6445820A (enrdf_load_stackoverflow)
DE (1) DE3855625D1 (enrdf_load_stackoverflow)
IN (1) IN172152B (enrdf_load_stackoverflow)

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EP1103640B1 (de) 1999-11-24 2004-03-03 Maschinenfabrik Rieter Ag Selektive Reinigungslinie
DE10064655B4 (de) * 2000-12-22 2012-01-26 TRüTZSCHLER GMBH & CO. KG Vorrichtung zur Regelung der mindestens einer Karde zuzuführenden Faserflockenmenge
DE10305049B4 (de) * 2003-02-07 2018-08-02 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum pneumatischen Speisen mindestens einer Spinnereivorbereitungsmaschine, z.B. Karde, Reiniger
DE102004060403A1 (de) * 2004-12-14 2006-07-06 Trützschler GmbH & Co KG Vorrichtung in der Spinnereivorbereitung zur Speisung einer Mehrzahl von Füllschächten, insbesondere Mischer, mit Fasermaterial
DE102015106415A1 (de) * 2014-12-13 2016-06-16 Trützschler GmbH + Co KG Textilmaschinenfabrik Verfahren und Vorrichtung zum Beschicken einer Anlage mit Fasern
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DE1802951A1 (de) * 1968-10-14 1970-06-25 Spinnereimaschb Karl Marx Stad Fuellschacht zum pneumatischen Speisen von Karden
AR207121A1 (es) * 1973-08-22 1976-09-15 Rieter Ag Maschf Dispositivo para la medicion de una cantidad de material fibroso transportada por una corriente de aire
DE3218114C2 (de) * 1981-05-20 1995-10-05 Truetzschler Gmbh & Co Kg Vorrichtung an einer Karde zur Vergleichmäßigung von Kardenbändern
DE3205776C3 (de) * 1982-02-18 1996-06-13 Truetzschler Gmbh & Co Kg Verfahren und Vorrichtung zur Regulierung der einer Krempel zuzuführenden Fasermenge
IN158614B (enrdf_load_stackoverflow) * 1982-04-01 1986-12-27 Truetzschler & Co
JPS5929962U (ja) * 1982-08-20 1984-02-24 石崎家具株式会社 ベビ−ベツド
DE3442942A1 (de) * 1984-11-24 1986-05-28 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum pneumatischen speisen einer anzahl von karden
DE3513295C2 (de) * 1985-04-13 1998-05-14 Truetzschler Gmbh & Co Kg Vorrichtung zum Abtragen von Faserballen
DE3617526A1 (de) * 1986-05-24 1987-11-26 Truetzschler & Co Verfahren und vorrichtung zum speisen einer anzahl von karden, krempeln o. dgl.

Also Published As

Publication number Publication date
DE3855625D1 (de) 1996-11-28
US4940367A (en) 1990-07-10
IN172152B (enrdf_load_stackoverflow) 1993-04-17
JPS6445820A (en) 1989-02-20
EP0303023A1 (de) 1989-02-15

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