EP0159567B1 - Method for removing clog in a false-twisting spinning unit - Google Patents

Method for removing clog in a false-twisting spinning unit Download PDF

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Publication number
EP0159567B1
EP0159567B1 EP85103711A EP85103711A EP0159567B1 EP 0159567 B1 EP0159567 B1 EP 0159567B1 EP 85103711 A EP85103711 A EP 85103711A EP 85103711 A EP85103711 A EP 85103711A EP 0159567 B1 EP0159567 B1 EP 0159567B1
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EP
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Prior art keywords
suction member
cleaning
spinning unit
suction part
false twist
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Expired
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EP85103711A
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German (de)
French (fr)
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EP0159567A1 (en
Inventor
Emil Briner
Urs Keller
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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
    • D01H—SPINNING OR TWISTING
    • D01H11/00—Arrangements for confining or removing dust, fly or the like
    • D01H11/005—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines

Definitions

  • the invention relates to a method for removing a blockage in a false twist spinning unit as described for example in the preamble of the first claim.
  • a number of false twist spinning devices are already known in which a fiber sliver emitted from a can is drawn in a drafting device for each spinning station, spun in a false twist spinning unit and the finished yarn is then wound up in a winding unit.
  • a yarn monitoring device is usually provided, which either reports so-called thick spots in the yarn or the absence of the yarn.
  • the whole can be done either manually or by means of a controlled device.
  • the yarn production is also stopped immediately in order to determine the reason for the missing yarn.
  • the fiber material in the suction part must be worked out manually with a suitable tool in order to then carry out the piecing process again.
  • this object is achieved by the steps defined in the characterizing part of claim 1.
  • this method requires a special false-twist spinning unit in which the suction part is designed to be automatically displaceable.
  • a sliver 1 is removed from a sliver can 2 and fed to a drafting device 3.
  • a so-called false twist spinning unit 4 comprises a suction part 5, one or more swirl sensors 6 adjoining it and a pair of take-off rolls 7.
  • the single swirl sensor is mentioned as representative for several.
  • a game monitoring device 9 is provided in the garniank between the pair of draw rollers 7 and a winding unit 8.
  • the fiber structure 10 released by the drafting system 3 is taken over by the suction part 5 and passed on to the swirl sensor 6. Due to the function of the twister 6, a finished yarn 11 is formed, which is taken over by the pair of take-off rollers 7 and passed on to the winding unit 8 via the thread monitoring device 9.
  • the suction part is connected to a suction device 13 by means of a connection 12.
  • the suction part can also work without the suction device 13, provided that the following swirl sensor 6 is a pneumatic swirl sensor with suction effect, which is coupled directly to the suction part.
  • the whole, d. H. from the sliver can 2 to the winding unit 8, is referred to as the spinning station.
  • FIG. 2 shows that, for cleaning the suction part 5, it is lifted or swung away from the operating position (shown with a broken line) into a cleaning position (shown with a solid line).
  • Lifting or swiveling away. the return to the operating position is carried out either manually or by a device 15 which is assigned to each spinning station or a moving cleaning machine.
  • This variant offers the advantage that the cleaning process does not have to be carried out within the operating arrangement of the elements.
  • the cleaning process can be repeated if the piecing process is successful.
  • connection 12 to the suction device 13 is interrupted or not interrupted for cleaning the suction part 5.
  • FIG. 3 a variant is shown, in which the suction part 5 is blocked by means of a device 16 for exchanging the suction part in an ejection position (shown with dashed line), in which the suction part 5 is removed from the spinning position, which is indicated by an arrow E is hinted at.
  • the removal of the blocked suction part and the detection of an operational suction part can be carried out manually or by means of the device 16 mentioned.
  • Ready-to-use and clogged suction parts can be accommodated in multiple magazines.
  • FIGS. 4 and 5 show a combination of the method steps which were set out using FIGS. 2 and 3.
  • the suction part 5 is cleaned in the raised position (shown with dashed lines) by means of the cleaning element 14 and then checked for the degree of cleaning by means of a control element 17 and then reinserted into the operating position (shown with a solid line), in order to then do so carry out the piecing process again.
  • the piecing process can then be carried out again.
  • checking the suction part 5 after cleaning by means of the cleaning element 14 can also be used for the cleaning methods described with FIG. 2.
  • connection 12 between the suction part 5 and the suction device 13 can also be interrupted for the cleaning process of the suction part 5 in the method shown with FIGS. 4 and 5.
  • the swirl sensor 6 can be a pneumatic or a mechanical swirl sensor. Any measures during piecing using a mechanical swirl sensor to take over the fiber material emitting from the suction part to the swirl sensor are not part of this invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Beheben einer Verstopfung in einer Falschdrall-Spinneinheit wie beispielsweise im Oberbegriff des ersten Anspruches beschrieben.The invention relates to a method for removing a blockage in a false twist spinning unit as described for example in the preamble of the first claim.

Es sind bereits eine Anzahl Falschdrall-Spinnvorrichtungen bekannt, bei welchen pro Spinnstelle eine aus einer Kanne abgegebene Faserlunte in einem Streckwerk verstreckt, in einer Falschdrall-Spinneinheit versponnen und das fertige Garn im Anschluss daran in einer Aufwindeeinheit aufgewunden wird.A number of false twist spinning devices are already known in which a fiber sliver emitted from a can is drawn in a drafting device for each spinning station, spun in a false twist spinning unit and the finished yarn is then wound up in a winding unit.

Zwischen der Falschdrall-Spinneinheit und der Aufwindevorrichtung ist in der Regel eine Garnüberwachungsvorrichtung vorgesehen, welche entweder sogenannte im Garn vorhandene Dickstellen oder das Fehlen des Garnes meldet.Between the false twist spinning unit and the winding device, a yarn monitoring device is usually provided, which either reports so-called thick spots in the yarn or the absence of the yarn.

Bei sogenannten Dickstellen wird die Gamproduktion unverzüglich stillgesetzt und das mit der Dickstelle versehene Garnstück entfernt. Im Anschluss'daran wird wieder neu angesponnen.In so-called thick spots, the yarn production is stopped immediately and the piece of yarn provided with the thick spot is removed. Afterwards it is spun again.

Das Ganze kann entweder manuell oder mittels einer gesteuerten Vorrichtung durchgeführt werden.The whole can be done either manually or by means of a controlled device.

Bei der Meldung eines fehlenden Garnes wird die Gamproduktion ebenfalls unverzüglich stillgesetzt, um den Grund des fehlenden Garnes festzustellen.If a missing yarn is reported, the yarn production is also stopped immediately in order to determine the reason for the missing yarn.

Bei der Verwendung eines pneumatischen Ansaugteiles, um den vom Streckwerk abgegebenen Faserverband zu übernehmen, besteht in vielen Fällen die Gefahr, dass sich im Ansaugteil eine Verstopfung bildet, beispielsweise falls Fremdkörper oder Faserbüschel im Faserverband vorhanden sind, welche eine den Ansaugteil abschliessende Blende resp. Verengung nicht durchqueren. (Siehe z. B. DE-A-3 238 986).When using a pneumatic suction part to take over the fiber structure emitted by the drafting system, in many cases there is a risk that a blockage will form in the suction part, for example if foreign bodies or tufts of fibers are present in the fiber structure, which have a panel that closes off the suction part. Do not cross the constriction. (See e.g. DE-A-3 238 986).

In solchen Fällen muss mit einem geeigneten Werkzeug das im Ansaugteil vorhandene Fasermaterial manuell herausgearbeitet werden, um im Anschluss daran den Anspinnvorgang wieder vorzunehmen.In such cases, the fiber material in the suction part must be worked out manually with a suitable tool in order to then carry out the piecing process again.

Dieses manuelle Herausarbeiten der Verstopfung hat jedoch den Nachteil, dass eine Gefahr der Beschädigung des Ansaugteiles durch die Bedienungsperson besteht und dadurch Verstopfungen durch beispielsweise an rauhen Oberflächen zurückgehaltenen Fasern noch haufiger als zuvor vorkommen. Ausserdem ist das manuelle Beheben der Störung sehr arbeitsintensiv und mit Wartezeiten auf das Bedienungspersonal verbunden.However, this manual working out of the blockage has the disadvantage that there is a risk of the suction part being damaged by the operator, and blockages due to fibers retained on rough surfaces, for example, occur even more frequently than before. In addition, the manual elimination of the fault is very labor intensive and involves waiting times for the operating personnel.

Es ist deshalb die Aufgabe der Erfindung, ein Verfahren bzw. eine Vorrichtung zu finden, welches die Beschädigungen vermeidet und welches die Spinnstelle auf eine rasche und rationelle Weise wieder in Betriebsbereitschaft versetzt.It is therefore the object of the invention to find a method or a device which avoids the damage and which brings the spinning station back into operational readiness in a quick and efficient manner.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil des Anspruches 1 definierte Schritte gelöst. Vorrichtungsmäßig erfordert dieses Verfahren eine besondere Falschdrall- Spinneinheit, bei der das Ansaugteil von dieser automatisch versetzbar ausgebildet ist.According to the invention, this object is achieved by the steps defined in the characterizing part of claim 1. In terms of the device, this method requires a special false-twist spinning unit in which the suction part is designed to be automatically displaceable.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß die Ansaugteile unbeschädigt und mit Sicherheit sauber gereinigt werden und daß im weiteren die Spinnstelle in kürzester Zeit wieder betriebsbereit ist. Zudem kommt der wesentliche Vorteil, daß der Reinigungsvorgang nicht innerhalb der Betriebsanordnung der Elemente durchgefühhrt werden muß.The advantages achieved by the invention are essentially to be seen in the fact that the suction parts are undamaged and safely cleaned clean and that the spinning station is ready for operation again in the shortest possible time. In addition, there is the significant advantage that the cleaning process does not have to be carried out within the operating arrangement of the elements.

Zwar ist es aus der FR-A-2 368 557 bekannt, beim Rotoroffenendspinnen zwecks automatischer Reinigung des Rotors die Spinnbox zu öffnen und ein Reinigungswerkzeug in den Rotor einzuführen, der Rotor wird jedoch nicht für den Reinigungsvorgang entfernt.Although it is known from FR-A-2 368 557 to open the spinning box for the purpose of automatic cleaning of the rotor and to insert a cleaning tool into the rotor, the rotor is not removed for the cleaning process.

Die Erfindung wird im folgenden anhand von lediglich Ausführungswege darstellenden Zeichnungen näher erläutert. Es zeigt :

  • Fig. 1 eine schematische Darstellung eines Spinnverfahrens,
  • Fig. 2 eine schematische Darstellung einer Variante des Verfahrens von Fig. 1,
  • Fig. 3 eine schematische Darstellung eines weiteren Verfahrens in der Reinigungsphase,
  • Fig. 4 ein weiteres Verfahren, schematisch und ebenfalls in der Reinigungsphase dargestellt,
  • Fig. 5 eine Variante des Verfahrens von Fig. 5.
The invention is explained in more detail below with the aid of drawings which only show execution routes. It shows :
  • 1 is a schematic representation of a spinning process,
  • FIG. 2 shows a schematic illustration of a variant of the method from FIG. 1, FIG.
  • 3 shows a schematic representation of a further method in the cleaning phase,
  • 4 shows a further method, shown schematically and also in the cleaning phase,
  • 5 shows a variant of the method of FIG. 5.

In einem sogenannten Falschdrall-Spinnverfahren wird ein Faserband 1 aus einer Faserbandkanne 2 entnommen und einem Streckwerk 3 zugeführt.In a so-called false twist spinning process, a sliver 1 is removed from a sliver can 2 and fed to a drafting device 3.

Eine sogenannte Falschdrall-Spinneinheit 4 umfasst einen Ansaugteil 5, einen oder mehrere daran anschliessende Drallgeber 6 und ein Abzugswalzenpaar 7. Im folgenden wird stellvertretend auch für mehrere nur noch der einzelne Drallgeber erwähnt.A so-called false twist spinning unit 4 comprises a suction part 5, one or more swirl sensors 6 adjoining it and a pair of take-off rolls 7. In the following, only the single swirl sensor is mentioned as representative for several.

Zwischen dem Abzugswalzenpaar 7 und einer Aufwindeeinheit 8 ist im Garniauf eine Gamüberwachungsvorrichtung 9 vorgesehen. Der vom Streckwerk 3 abgegebene Faserverband 10 wird vom Ansaugteil 5 übernommen und an den Drallgeber 6 weitergegeben. Durch die Funktion des Drallgebers 6 bildet sich ein fertiges Garn 11, welches durch das Abzugswalzenpaar 7 übemommen und via die Gamüberwachungseinrichtung 9 an die Aufwindeeinheit 8 weitergeleitet wird.A game monitoring device 9 is provided in the garniauf between the pair of draw rollers 7 and a winding unit 8. The fiber structure 10 released by the drafting system 3 is taken over by the suction part 5 and passed on to the swirl sensor 6. Due to the function of the twister 6, a finished yarn 11 is formed, which is taken over by the pair of take-off rollers 7 and passed on to the winding unit 8 via the thread monitoring device 9.

Der Ansaugteil ist mittels einer Verbindung 12 mit einer Absaugvorrichtung 13 verbunden. Der Ansaugteil kann aber auch ohne die Absaugvorrichtung 13 arbeiten, vorausgesetzt, dass der nachfolgende Drallgeber 6 ein pneumatischer Drallgeber mit Ansaugwirkung ist, welcher direkt mit dem Ansaugteil gekoppelt ist.The suction part is connected to a suction device 13 by means of a connection 12. However, the suction part can also work without the suction device 13, provided that the following swirl sensor 6 is a pneumatic swirl sensor with suction effect, which is coupled directly to the suction part.

Das Ganze, d. h. von der Faserbandkanne 2 bis zur Aufwindeeinheit 8, wird als Spinnstelle bezeichnet.The whole, d. H. from the sliver can 2 to the winding unit 8, is referred to as the spinning station.

Fig. 2 zeigt, dass für das Reinigen des Ansaugteiles 5 dieses aus der Betriebsposition (mit gestrichelter Linie dargestellt) in eine Reinigungsposition (mit ausgezogener Linie dargestellt) weggehoben oder weggeschwenkt wird.FIG. 2 shows that, for cleaning the suction part 5, it is lifted or swung away from the operating position (shown with a broken line) into a cleaning position (shown with a solid line).

Das Wegheben oder das Wegschwenken resp. das Zurückbringen in die Betriebsposition erfolgt entweder manuell oder durch eine Vorrichtung 15, welche jeder Spinnstelle oder einem wandernden Reinigungsautomaten zugeordnet ist.Lifting or swiveling away. the return to the operating position is carried out either manually or by a device 15 which is assigned to each spinning station or a moving cleaning machine.

Diese Variante bietet den Vorteil, dass der Reinigungsvorgang nicht innerhalb der Betriebsanordnung der Elemente durchgeführt werden muss.This variant offers the advantage that the cleaning process does not have to be carried out within the operating arrangement of the elements.

Nach dem Positionieren des Ansaugteiles 5 zurück in die Betriebsposition wird der Anspinnvorgang durchgeführt.After positioning the suction part 5 back into the operating position, the piecing process is carried out.

Der Reinigungsvorgang kann wiederholt werden, falls der Anspinnvorgang erfolgles verläuft.The cleaning process can be repeated if the piecing process is successful.

Je nach verwendeter Reinigungsvorrichtung wird für das Reinigen des Ansaugteils 5 die Verbindung 12 zur Ansaugvorrichtung 13 unterbrochen oder nicht unterbrochen.Depending on the cleaning device used, the connection 12 to the suction device 13 is interrupted or not interrupted for cleaning the suction part 5.

Mit Fig. 3 ist eine Variante gezeigt, in welcher bei Verstopfung des Ansaugteiles 5 dieses mittels einer Vorrichtung 16 zum Auswechseln des Ansaugteiles in eine Ausstoßposition (mit gestrichelter Linie dargestellt) gebracht, in welcher das Ansaugteil 5 aus der Spinnstelle entfernt wird, was mit Pfeil E andeutungsweise dargestellt ist.With Fig. 3 a variant is shown, in which the suction part 5 is blocked by means of a device 16 for exchanging the suction part in an ejection position (shown with dashed line), in which the suction part 5 is removed from the spinning position, which is indicated by an arrow E is hinted at.

Im Anschluß daran wird in derselben Lage oder, wie in Fig. 3 mit strichpunktierten Linien dargestellt, in einer weiteren Lage ein betriebsbereites Ansaugteil 5.1 erfaßt, was andeutungsweise mit dem Pfeil F dargestellt ist und in die Betriebsposition (mit ausgezogener Linie dargestellt) gebracht, so daß der Anspinnvorgang wieder eingesetzt werden kann.Subsequently, in the same position or, as shown in Fig. 3 with dash-dotted lines, in a further position an operational intake 5.1 is detected, which is indicated by the arrow F and brought into the operating position (shown with a solid line), so that the piecing process can be used again.

Das Entfernen des verstopften Ansaugteiles und das Erfassen eines betriebsbereiten Ansaugteiles kann manuell oder mittels der genannten Vorrichtung 16 durchgeführt werden.The removal of the blocked suction part and the detection of an operational suction part can be carried out manually or by means of the device 16 mentioned.

Betriebsbereite und verstopfte Ansaugteile können in Mehrfachmagazinen untergebracht sein.Ready-to-use and clogged suction parts can be accommodated in multiple magazines.

Nach dem vorgenannten Entfernen des Ansaugteiles 5 kann dieses Teil in einem separaten Arbeitsgang gereinigt und in eine Bereitschaftsposition gebracht werden, aus welcher das Ansaugteil mit der mit dem Pfeil F angedeuteten Bewegung wieder herausgeholt werden kann. Die Figuren 4 und 5 zeigen eine Kombination der Verfahrensschritte, welche mittels der Figuren 2 und 3 dargelegt wurden.After the aforementioned removal of the suction part 5, this part can be cleaned in a separate operation and brought into a standby position, from which the suction part can be taken out again with the movement indicated by the arrow F. FIGS. 4 and 5 show a combination of the method steps which were set out using FIGS. 2 and 3.

In diesem Verfahren wird das Ansaugteil 5 in der herausgehobenen Position (mit gestrichelten Linien dargestellt) mittels dem Reinigungselement 14 gereinigt und anschliessend mittels eines Kontrollelements 17 auf den Reinigungsgrad geprüft sowie anschliessend wieder in die Betriebsposition (mit ausgezogener Linie dargestellt) eingesetzt, um im Anschluss daran den Anspinnvorgang wieder vorzunehmen.In this method, the suction part 5 is cleaned in the raised position (shown with dashed lines) by means of the cleaning element 14 and then checked for the degree of cleaning by means of a control element 17 and then reinserted into the operating position (shown with a solid line), in order to then do so carry out the piecing process again.

Das Verfahren nach Fig. 5 enthält den Zusatz, dass nach erfolgloser Reinigung des Ansaugteiles 5 dieses, wie mit Pfeil E angedeutet, entfernt und im Anschluss daran ein neues, betriebsbereites Ansaugteil 5, wie mit Pfeil F angedeutet, erfasst und in die Betriebsposition (mit ausgezogener Linie dargestellt) gebracht wird.5 includes the addition that after unsuccessful cleaning of the suction part 5, as indicated by arrow E, it is removed and then a new, ready-to-use suction part 5, as indicated by arrow F, is detected and in the operating position (with solid line) is brought.

Im Anschluss daran kann wieder der Anspinnvorgang vorgenommen werden.The piecing process can then be carried out again.

Es versteht sich, daß das Kontrollieren des Ansaugteiles 5 nach dem Reinigen mittels des Reinigungselementes 14 auch für die mit Fig. 2 beschriebenen Reinigungsverfahren angewendet werden kann.It goes without saying that checking the suction part 5 after cleaning by means of the cleaning element 14 can also be used for the cleaning methods described with FIG. 2.

Ebenfalls versteht es sich, daß auch bei den mit Fig. 4 und 5 gezeigten Verfahren die Verbindung 12 zwischen dem Ansaugteil 5 und der Ansaugvorrichtung 13 für den Reinigungsvorgang des Ansaugteiles 5 unterbrochen werden kann.It is also understood that the connection 12 between the suction part 5 and the suction device 13 can also be interrupted for the cleaning process of the suction part 5 in the method shown with FIGS. 4 and 5.

.Im weiteren sei erwähnt, daß der Drallgeber 6 ein pneumatischer oder ein mechanischer Drallgeber sein kann. Allfällige Maßnahmen beim Anspinnen unter Verwendung eines mechanischen Drallgebers zur Übernahme des vom Ansaugteil abgebenden Fasermaterials an den Drallgeber sind nicht Bestandteil dieser Erfindung.It should also be mentioned that the swirl sensor 6 can be a pneumatic or a mechanical swirl sensor. Any measures during piecing using a mechanical swirl sensor to take over the fiber material emitting from the suction part to the swirl sensor are not part of this invention.

Claims (6)

1. Method of removing a blockage in a false twist spinning unit (4) in particular in a suction member (5) upstream of a twisting element (6) as considered in the direction of yam movement, and to avoid damage to the suction member (5), a yarn monitoring device (9) being provided downstream of the false twist spinning unit (4) as considered in the direction of yarn movement, such device (9) serving to detect a blockage in the false twist spinning unit (4) characterised by the following method steps:
1. opening of the spinning unit (4) after detection of a blockage,
2. movement of suction member (5) into a cleaning position,
3. cleaning (14) of suction member (5),
4. checking (17) of suction member (5),
5. return of suction member (5) to operational position,
6. restarting spinning.
2. Method according to claim 1, characteristed in that after the suction member (5) has been moved into the cleaning position it is replaced by a serviceable suction member in the spinning unit.
3. Method according to claim 1 or 2, characterised in that after the cleaning of the moved suction member (5) in the cleaning position it is then moved into a standby position.
4. Method according to claim 1, characterised in that in the event of inadequate cleaning of the suction member (5), the said member is removed (E) and is replaced (F) by a suction member (5.1) in an operational condition.
5. Method according to claims 3 to 6, characterised in that the method steps are controlled automatically.
6. Apparatus for performing the method accor- dint to one or more of the preceding claims, characterised in tthat the suction member (5) is so devised as to be automatically movable by the false twist spinning unit (4).
EP85103711A 1984-04-25 1985-03-28 Method for removing clog in a false-twisting spinning unit Expired EP0159567B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH202784 1984-04-25
CH2027/84 1984-04-25

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EP0159567A1 EP0159567A1 (en) 1985-10-30
EP0159567B1 true EP0159567B1 (en) 1989-08-30

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US (1) US4669258A (en)
EP (1) EP0159567B1 (en)
JP (1) JPH0670287B2 (en)
DE (1) DE3572699D1 (en)
IN (1) IN163298B (en)

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DE4026191A1 (en) * 1990-08-18 1992-02-20 Schlafhorst & Co W Cleaning of air vortex spinning head - in which direction of air flow through spinning head is reversed and waste is removed by suction

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JPH0789623A (en) 1993-09-22 1995-04-04 Canon Inc Sheet feeding device and sheet material property detecting device

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Publication number Priority date Publication date Assignee Title
DE1933930B2 (en) 1969-07-04 1981-06-19 Wilhelm Stahlecker Gmbh, 7341 Reichenbach Open-end spinning machine with several spinning units
EP0019595A1 (en) 1979-05-17 1980-11-26 Officine Savio S.p.A. Method and device for cleaning rotors in spinning machines of the open-end type
DE2924938A1 (en) 1979-06-21 1981-01-22 Fritz Stahlecker Open=end spinner sliver opening roller - has monitor to check roller operation
JPH0789623A (en) 1993-09-22 1995-04-04 Canon Inc Sheet feeding device and sheet material property detecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026191A1 (en) * 1990-08-18 1992-02-20 Schlafhorst & Co W Cleaning of air vortex spinning head - in which direction of air flow through spinning head is reversed and waste is removed by suction
DE4026191C2 (en) * 1990-08-18 1999-09-16 Schlafhorst & Co W Cleaning of air vortex spinning head - in which direction of air flow through spinning head is reversed and waste is removed by suction

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IN163298B (en) 1988-09-03
JPH0670287B2 (en) 1994-09-07
DE3572699D1 (en) 1989-10-05
EP0159567A1 (en) 1985-10-30
US4669258A (en) 1987-06-02
JPS60231829A (en) 1985-11-18

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