EP0345558B1 - Method for inserting a fibre web into the pressing rolls of a lap-forming machine - Google Patents

Method for inserting a fibre web into the pressing rolls of a lap-forming machine Download PDF

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Publication number
EP0345558B1
EP0345558B1 EP89109498A EP89109498A EP0345558B1 EP 0345558 B1 EP0345558 B1 EP 0345558B1 EP 89109498 A EP89109498 A EP 89109498A EP 89109498 A EP89109498 A EP 89109498A EP 0345558 B1 EP0345558 B1 EP 0345558B1
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EP
European Patent Office
Prior art keywords
plate
axis
front part
flat structure
rollers
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EP89109498A
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German (de)
French (fr)
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EP0345558A1 (en
Inventor
Paul Scheurer
Peter Baechinger
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0345558A1 publication Critical patent/EP0345558A1/en
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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
    • D01G27/00—Lap- or sliver-winding devices, e.g. for products of cotton scutchers, jute cards, or worsted gill boxes

Definitions

  • Textile fibers that are to be combed are usually fed to a combing machine as wadding in the form of wadding rolls.
  • a cotton tape is produced on a tape winding machine from several stretch tapes and then wound up. Before winding, the cotton is calendered to smooth its surfaces so that the cotton can subsequently be unwound from the winding on the combing machine without any problems.
  • Known tape winding machines contain two rotatable winding rollers which carry a cotton roll during winding and a roller calender arranged adjacent to one of the winding rollers.
  • An arrangement in which four calender rolls are arranged in a row which is approximately concentric with one of the winding rolls has proven particularly useful.
  • the calender rolls are pressed against one another with a predetermined force. When pulling in the beginning of a new cotton tape, the force is released, which creates small gaps between the calender rolls.
  • the guide plate should be the beginning of a cotton tape around the bottom of the Guide the calender roll around in the gap between this calender roll and the next calender roll while slowly turning the calender rolls.
  • the device with the guide plate does not work reliably. In particular, if the guide plate is dirty, it can easily clog between the guide plate and the calender roller.
  • the invention therefore has set itself the goal of providing a method with which the difficulties described can be avoided and the beginning of a cotton tape easily and safely around the inaccessible underside of one calender roll and through the gap between this calender roll and the next Calender roll can be passed.
  • the method according to the invention for drawing in a cotton tape between calender rolls on a tape winding machine, with which the specified aim is achieved is characterized in that a plate, of which at least one front section is curved in a bowl shape around an axis, with a front edge in the gap between two adjacent ones of the calender rolls are inserted and moved around one of the two rolls into the gap between this and a third of the calender rolls and that an initial section of the cotton tape is placed on a flexible sheet and / or cloth sheet material attached to a rear edge of the plate and then the plate and the sheet are moved on until the sheet has passed through the second gap.
  • the invention also relates to an auxiliary device for carrying out the method according to the invention, which auxiliary device is characterized by a plate, of which at least one front section is curved in a shell-like manner around an axis, and a flexible sheet made of film and / or cloth attached to an edge of the plate .
  • Fig. 1 shows a cotton roll 1, which rests on two rotatable winding rollers 2 and 3.
  • a cotton tape 4 shown with a broken line runs through a roller calender before it runs to the cotton roll 1 and is wound thereon.
  • the calender consists of four calender rolls 5, 6, 7 and 8, which are arranged adjacent to the winding roll 2 in a row approximately concentric to this. In operation, the calender rolls 5, 6, 7 and 8 are pressed against one another by a means, not shown, with a predetermined force.
  • the pressing force is released and the calender rolls 5, 6, 7 and 8 are slightly separated from each other, so that a small gap of, for example, about 3 mm width is created between two adjacent calender rolls. It can be seen that it is then relatively easy to insert the beginning of the new cotton band from above between the rollers 5 and 6 between the rollers 7 and 8, while the rollers are allowed to rotate slowly. However, it is very difficult to ensure that the beginning of the cotton tape passes between the rollers 6 and 7 from below without any aids.
  • auxiliary device shown in Fig. 2 used. This consists of a plate 11 with a front edge 12 and a rear edge 13 and a flexible sheet 14 fastened to the plate 11 at the rear edge 13 and made of film and / or cloth.
  • the plate 11 has a front section 15, which is curved in the shape of a shell around an axis A, and a rear section 16, which is less curved or preferably approximately flat.
  • the radius of curvature R of the front section 15 is approximately the same as or slightly larger than the radius of the calender rolls, in particular the calender roll 6.
  • the front section 15 extends, viewed from the axis A, over a winding ⁇ (in one to the axis A vertical plane measured) of more than 180 °, e.g. 190 to 230 °, preferably about 210 °.
  • the length d of the rear section 16 is approximately 20 to 70% of the radius of curvature R.
  • the rear section 16 could also be omitted, that is to say have a length of zero.
  • the plate 11 can suitably consist of plastic, e.g. made of polyvinyl chloride with a thickness of about 1 to 2.5 mm.
  • the flexible sheet 14 consists of a film, e.g. Plastic film, and / or cloth.
  • the fabric 14 is, for example, a fabric that is coated on the underside with a plastic film and on the top is covered with projecting, inclined fine bristles or fibers or hooks, which are directed towards the edge 13 of the plate 11. Sheets of this type are known as textile brush covers.
  • the Plate 11 with the leading edge 12 first inserted manually from above between the rollers 5 and 6 and moved around the roller 6 until the leading edge 12 between the rollers 6 and 7 comes up again, as shown in FIG. 3.
  • the plate 11 is somewhat elastic, but in any case sufficiently stiff to ensure that the front edge 12 of the plate 11 inserted between the rollers 5 and 6 always reaches the gap between the rollers 6 and 7.
  • the fabric 14 fastened to the rear edge of the plate 11 is placed over the roller 5, and an initial section of the new cotton tape 4 is placed on the fabric.
  • the calender rollers 5, 6, 7, 8 are then rotated further until the plate 11 is pushed out completely from the nip between the rollers 6 and 7 and also the sheet 14 with the initial section of the new cotton tape 4 has left this nip, as shown in Fig. 5. If the initial section of the cotton tape 4 detaches from the fabric 14 and falls onto the roller 6, then this does not bother.
  • the auxiliary device is now removed and the initial section of the cotton tape 4 is placed over the roller 7 and inserted between the rollers 7 and 8.
  • the calender rolls are no longer pressed against each other, so that there is again a small gap between the rolls 7 and 8.
  • the cotton tape 4 emerging downward from the gap between the rollers 7 and 8 then runs onto the circumference of the winding roller 2 (FIG. 1) and is taken by it to the cotton roll 1.

Description

Textilfasern, die gekämmt werden sollen, werden einer Kämmaschine in der Regel als Watten in Form von Wattewickeln zugeführt. Ein Watteband wird auf einer Bandwickelmaschine aus mehreren Streckenbändern hergestellt und dann aufgewickelt. Vor dem Aufwickeln ist ein Kalandern der Watte zum Glätten ihrer Oberflächen erforderlich, damit die Watte von dem Wickel nachher auf der Kämmaschine problemlos wieder abgewickelt werden kann.Textile fibers that are to be combed are usually fed to a combing machine as wadding in the form of wadding rolls. A cotton tape is produced on a tape winding machine from several stretch tapes and then wound up. Before winding, the cotton is calendered to smooth its surfaces so that the cotton can subsequently be unwound from the winding on the combing machine without any problems.

Bekannte Bandwickelmaschinen enthalten zwei drehbare Wickelwalzen, die einen Wattewickel während des Aufwickelns tragen, und einen benachbart zu einer der Wickelwalzen angeordneten Walzenkalander. Dabei hat sich insbesondere eine Anordnung bewährt, bei der vier Kalanderwalzen in einer zu einer der Wickelwalzen etwa konzentrischen Reihe angeordnet sind. Im Betrieb werden die Kalanderwalzen mit einer vorbestimmten Kraft gegeneinandergepresst. Für das Einziehen des Anfangs eines neuen Wattebandes wird die Kraft aufgehoben, wodurch sich zwischen den Kalanderwalzen kleine Spalte bilden.Known tape winding machines contain two rotatable winding rollers which carry a cotton roll during winding and a roller calender arranged adjacent to one of the winding rollers. An arrangement in which four calender rolls are arranged in a row which is approximately concentric with one of the winding rolls has proven particularly useful. In operation, the calender rolls are pressed against one another with a predetermined force. When pulling in the beginning of a new cotton tape, the force is released, which creates small gaps between the calender rolls.

Das Einziehen des Anfangs eines neuen Wattebandes ist jedoch schwierig, wenn, insbesondere bei einer Anordnung mit vier Kalanderwalzen, das Watteband um die der Wickelwalze zugekehrte Unterseite einer der Kalanderwalzen herum und dann durch den Spalt zwischen dieser Kalanderwalze und der nächsten Kalanderwalze wieder nach aussen geführt werden muss. Die der Wickelwalze zugekehrten Unterseiten der Wickelwalzen sind nicht zugänglich und normalerweise noch nicht einmal einsehbar.However, pulling in the beginning of a new cotton band is difficult if, particularly in the case of an arrangement with four calender rolls, the cotton band is passed around the underside of one of the calender rolls facing the winding roll and then out again through the gap between this calender roll and the next calender roll got to. The undersides of the winding rollers facing the winding roller are inaccessible and normally cannot even be seen.

Es ist bekannt, unter der Kalanderwalze, um deren Unterseite das Watteband herumgeführt werden muss, ein Führungsblech anzuordnen. Das Führungsblech soll den Anfang eines Wattebandes um die Unterseite der Kalanderwalze herum in den Spalt zwischen dieser Kalanderwalze und der nächsten Kalanderwalze führen, während man die Kalanderwalzen langsam drehen lässt. Die Einrichtung mit dem Führungsblech funktioniert jedoch nicht zuverlässig. Insbesondere wenn das Führungsblech verschmutzt ist, kommt es leicht zur Verstopfung zwischen dem Führungsblech und der Kalanderwalze.It is known to arrange a guide plate under the calender roll, around the underside of which the cotton tape has to be guided. The guide plate should be the beginning of a cotton tape around the bottom of the Guide the calender roll around in the gap between this calender roll and the next calender roll while slowly turning the calender rolls. However, the device with the guide plate does not work reliably. In particular, if the guide plate is dirty, it can easily clog between the guide plate and the calender roller.

Die Erfindung hat sich daher zum Ziel gesetzt, ein Verfahren zur Verfügung zu stellen, mit dem die geschilderten Schwierigkeiten vermieden werden können und der Anfang eines Wattebandes problemlos und sicher um die nicht zugängliche Unterseite einer Kalanderwalze herum und durch den Spalt zwischen dieser Kalanderwalze und der nächsten Kalanderwalze hindurchgeführt werden kann.The invention therefore has set itself the goal of providing a method with which the difficulties described can be avoided and the beginning of a cotton tape easily and safely around the inaccessible underside of one calender roll and through the gap between this calender roll and the next Calender roll can be passed.

Das erfindungsgemässe Verfahren zum Einziehen eines Wattebandes zwischen Kalanderwalzen an einer Bandwickelmaschine, mit dem das angegebene Ziel erreicht wird, ist dadurch gekennzeichnet, dass eine Platte, von der wenigstens ein vorderer Abschnitt schalenförmig um eine Achse gekrümmt ist, mit einem vorderen Rand in den Spalt zwischen zwei benachbarten der Kalanderwalzen eingeführt und um eine der beiden Walzen bis in den Spalt zwischen dieser und einer dritten der Kalanderwalzen herumbewegt wird und dass ein Anfangsabschnitt des Wattebandes auf ein an einem hinteren Rand der Platte befestigtes biegsames Flächengebilde aus Folie und/oder Tuch aufgelegt wird und dann die Platte und das Flächengebilde weiterbewegt werden, bis das Flächengebilde durch den zweitgenannten Spalt hindurchgetreten ist.The method according to the invention for drawing in a cotton tape between calender rolls on a tape winding machine, with which the specified aim is achieved, is characterized in that a plate, of which at least one front section is curved in a bowl shape around an axis, with a front edge in the gap between two adjacent ones of the calender rolls are inserted and moved around one of the two rolls into the gap between this and a third of the calender rolls and that an initial section of the cotton tape is placed on a flexible sheet and / or cloth sheet material attached to a rear edge of the plate and then the plate and the sheet are moved on until the sheet has passed through the second gap.

Die Erfindung betrifft auch ein Hilfsgerät für die Durchführung des erfindungsgemässen Verfahrens, welches Hilfsgerät gekennzeichnet ist durch eine Platte, von der wenigstens ein vorderer Abschnitt schalenförmig um eine Achse gekrümmt ist, und ein an einem Rand der Platte befestigtes biegsames Flächengebilde aus Folie und/oder Tuch.The invention also relates to an auxiliary device for carrying out the method according to the invention, which auxiliary device is characterized by a plate, of which at least one front section is curved in a shell-like manner around an axis, and a flexible sheet made of film and / or cloth attached to an edge of the plate .

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnungen näher erläutert. In diesen zeigen:

  • Fig. 1 einen schematischen Vertikalschnitt durch Teile einer Bandwickelmaschine,
  • Fig. 2 in grösserem Massstab eine perspektivische Ansicht eines Hilfsgerätes, das zum Einziehen eines Wattebandes zwischen die in Fig. 1 gezeigten Kalanderwalzen verwendet wird, und
  • Fig. 3 bis 5 die in Fig. 1 gezeigten Kalanderwalzen jeweils während verschiedener Stufen des Einziehens eines Wattebandes.
Embodiments of the invention are explained below with reference to the drawings. In these show:
  • 1 is a schematic vertical section through parts of a tape winding machine,
  • Fig. 2 on a larger scale a perspective view of an auxiliary device which is used for pulling a cotton tape between the calender rolls shown in Fig. 1, and
  • Fig. 3 to 5, the calender rolls shown in Fig. 1 each during different stages of pulling a cotton tape.

Die Fig. 1 zeigt eine Wattewickel 1, der auf zwei drehbaren Wickelwalzen 2 und 3 aufliegt. Ein mit einer unterbrochenen Linie dargestelltes Watteband 4 läuft durch einen Walzenkalander, bevor es dem Wattewickel 1 zuläuft und auf diesem aufgewickelt wird. Der Kalander besteht aus vier Kalanderwalzen 5, 6, 7 und 8, die benachbart zur Wickelwalze 2 in einer zu dieser etwa konzentrischen Reihe angeordnet sind. Im Betrieb werden die Kalanderwalzen 5, 6, 7 und 8 durch nicht dargestellte Mittel mit einer vorbestimmten Kraft gegeneinandergepresst.Fig. 1 shows a cotton roll 1, which rests on two rotatable winding rollers 2 and 3. A cotton tape 4 shown with a broken line runs through a roller calender before it runs to the cotton roll 1 and is wound thereon. The calender consists of four calender rolls 5, 6, 7 and 8, which are arranged adjacent to the winding roll 2 in a row approximately concentric to this. In operation, the calender rolls 5, 6, 7 and 8 are pressed against one another by a means, not shown, with a predetermined force.

Für das Einziehen des Anfangs eines neuen Wattebandes 4 zwischen die Kalanderwalzen wird die Presskraft aufgehoben und werden die Kalanderwalzen 5, 6, 7 und 8 geringfügig voneinander entfernt, so dass zwischen je zwei benachbarten Kalanderwalzen ein kleiner Spalt von beispeilsweise etwa 3 mm Breite entsteht. Es ist ersichtlich, dass es dann relativ einfach ist, den Anfang des neuen Wattebandes von oben zwischen die Walzen 5 und 6 zwischen die Walzen 7 und 8 einzuführen, während man die Walzen langsam drehen lässt. Es ist jedoch ohne Hilfsmittel sehr schwierig, dafür zu sorgen, dass der Anfang des Wattebandes von unten her zwischen den Walzen 6 und 7 hindurchtritt.For the pulling in of the beginning of a new cotton tape 4 between the calender rolls, the pressing force is released and the calender rolls 5, 6, 7 and 8 are slightly separated from each other, so that a small gap of, for example, about 3 mm width is created between two adjacent calender rolls. It can be seen that it is then relatively easy to insert the beginning of the new cotton band from above between the rollers 5 and 6 between the rollers 7 and 8, while the rollers are allowed to rotate slowly. However, it is very difficult to ensure that the beginning of the cotton tape passes between the rollers 6 and 7 from below without any aids.

Um das letztere in einfacher Weise stets sicher und störungsfrei zu erreichen, wird erfindungsgemäss das in Fig. 2 dargestellte Hilfsgerät verwendet. Dieses besteht aus einer Platte 11 mit einem vorderen Rand 12 und einem hinteren Rand 13 und aus einem beim hinteren Rand 13 an der Platte 11 befestigten biegsamen Flächengebilde 14 aus Folie und/oder Tuch.In order to always achieve the latter in a simple and safe and trouble-free manner, the method according to the invention the auxiliary device shown in Fig. 2 used. This consists of a plate 11 with a front edge 12 and a rear edge 13 and a flexible sheet 14 fastened to the plate 11 at the rear edge 13 and made of film and / or cloth.

Die Platte 11 besitzt einen vorderen Abschnitt 15, der schalenförmig um eine Achse A gekrümmt ist, und einen hinteren Abschnitt 16, der weniger start gekrümmt oder vorzugsweise etwa eben ist. Der Krümmungsradius R des vorderen Abschnittes 15 ist etwa gleich gross wie oder wenig grösser als der Radius der Kalanderwalzen, insbesondere der Kalanderwalze 6. Der vordere Abschnitt 15 erstreckt sich, von der Achse A aus gesehen, über einen Wickel α (in einer zur Achse A senkrechten Ebene gemessen) von mehr als 180°, z.B. 190 bis 230°, vorzugsweise etwa 210°. Die Länge d des hinteren Abschnittes 16 beträgt etwa 20 bis 70% des Krümmungsradius R. Der hintere Abschnitt 16 könnte jedoch auch weggelassen werden, das heisst, die Länge null haben. Die Platte 11 kann zweckmässig aus Kunststoff bestehen, z.B. aus Polyvinylchlorid mit einer Dicke von etwa 1 bis 2,5 mm.The plate 11 has a front section 15, which is curved in the shape of a shell around an axis A, and a rear section 16, which is less curved or preferably approximately flat. The radius of curvature R of the front section 15 is approximately the same as or slightly larger than the radius of the calender rolls, in particular the calender roll 6. The front section 15 extends, viewed from the axis A, over a winding α (in one to the axis A vertical plane measured) of more than 180 °, e.g. 190 to 230 °, preferably about 210 °. The length d of the rear section 16 is approximately 20 to 70% of the radius of curvature R. However, the rear section 16 could also be omitted, that is to say have a length of zero. The plate 11 can suitably consist of plastic, e.g. made of polyvinyl chloride with a thickness of about 1 to 2.5 mm.

Das biegsame Flächengebilde 14 besteht aus einer Folie, z.B. Kunststoffolie, und/oder aus Tuch. Das Flächengebilde 14 ist beispielweise ein Gewebe, das an seiner Unterseite mit einer Kunststoffolie beschichtet ist und an seiner Oberseite mit vorstehenden, geneigten feinen Borsten oder Fasern oder Häkchen besetzt ist, welche zum Rand 13 der Platte 11 hin gerichtet sind. Flächengebilde dieser Art sind als Textilbürstenbezüge bekannt.The flexible sheet 14 consists of a film, e.g. Plastic film, and / or cloth. The fabric 14 is, for example, a fabric that is coated on the underside with a plastic film and on the top is covered with projecting, inclined fine bristles or fibers or hooks, which are directed towards the edge 13 of the plate 11. Sheets of this type are known as textile brush covers.

Die Verwendung des beschriebenen Hilfsgerätes zum Einziehen des Anfangs S eines neuen Wattebandes 4 zwischen die Kalanderwalzen 5, 6, 7, 8 wird nachstehend anhand der Fig. 3 bis 5 erläutert.The use of the auxiliary device described for pulling in the start S of a new cotton tape 4 between the calender rolls 5, 6, 7, 8 is explained below with reference to FIGS. 3 to 5.

Zuerst wird, während die Kalanderwalzen nicht gegeneinander gepresst sind und zwischen ihnen die schon erwähnten kleinen Spalte vorhanden sind, die Platte 11 mit dem vorderen Rand 12 voran manuell von oben her zwischen die Walzen 5 und 6 eingeführt und um die Walze 6 herumbewegt, bis der vordere Rand 12 zwischen den Walzen 6 und 7 wieder nach oben heraustritt, wie in Fig. 3 gezeigt. Die Platte 11 ist zwar etwas elastisch, jedoch in jedem Fall genügend steif, um zu gewährleisten, dass der vordere Rand 12 der zwischen die Walzen 5 und 6 eingeführten Platte 11 stets den Spalt zwischen den Walzen 6 und 7 erreicht. Dann wird, wie ebenfalls in Fig. 3 gezeigt, das am hinteren Rand der Platte 11 befestigte Flächengebilde 14 über die Walze 5 gelegt, und auf das Flächengebilde wird ein Anfangsabschnitt des neuen Wattebandes 4 aufgelegt.First, while the calender rolls are not pressed against each other and between them there are the small gaps already mentioned, the Plate 11 with the leading edge 12 first inserted manually from above between the rollers 5 and 6 and moved around the roller 6 until the leading edge 12 between the rollers 6 and 7 comes up again, as shown in FIG. 3. The plate 11 is somewhat elastic, but in any case sufficiently stiff to ensure that the front edge 12 of the plate 11 inserted between the rollers 5 and 6 always reaches the gap between the rollers 6 and 7. Then, as also shown in FIG. 3, the fabric 14 fastened to the rear edge of the plate 11 is placed over the roller 5, and an initial section of the new cotton tape 4 is placed on the fabric.

Dann werden die Kalanderwalzen 5, 6, 7, 8 gegeneinandergepresst und langsam gedreht. Dadurch wird die Platte 11 in der Klemmstelle zwischen den Walzen 6 und 7 nach oben gezogen, bis sie die in Fig. 4 gezeigte Stellung erreicht. Der etwa ebene hintere Abschnitt 16 (Fig. 2) der Platte 11 hat die Wirkung, dass der vordere Abschnitt der Platte etwas von der Walze 6 abhebt und nicht erneut in die Klemmstelle zwischen den Walzen 5 und 6 eintritt. Das am hinteren Rand der Platte 11 befestigte Flächengebilde 14 und der auf diesem haftende Anfangsabschnitt des neuen Wattebandes 4 erstrekken sich in der Stellung gemäss Fig. 4 um die Unterseite der Walze 6 herum.Then the calender rolls 5, 6, 7, 8 are pressed against each other and slowly rotated. As a result, the plate 11 is pulled upwards in the nip between the rollers 6 and 7 until it reaches the position shown in FIG. 4. The approximately flat rear section 16 (FIG. 2) of the plate 11 has the effect that the front section of the plate lifts somewhat from the roller 6 and does not re-enter the nip between the rollers 5 and 6. The flat structure 14 fastened to the rear edge of the plate 11 and the initial section of the new cotton tape 4 adhering to it extend in the position according to FIG. 4 around the underside of the roller 6.

Die Kalanderwalzen 5, 6, 7, 8 werden dann weiter gedreht, bis die Platte 11 ganz aus der Klemmstelle zwischen den Walzen 6 und 7 nach oben herausgestossen ist und auch das Flächengebilde 14 mit dem Anfangsabschnitt des neuen Wattebandes 4 diese Klemmstelle verlassen hat, wie in Fig. 5 gezeigt. Wenn sich der Anfangsabschnitt des Wattebandes 4 dabei vom Flächengebilde 14 löst und auf die Walze 6 fällt, dann stört das nicht.The calender rollers 5, 6, 7, 8 are then rotated further until the plate 11 is pushed out completely from the nip between the rollers 6 and 7 and also the sheet 14 with the initial section of the new cotton tape 4 has left this nip, as shown in Fig. 5. If the initial section of the cotton tape 4 detaches from the fabric 14 and falls onto the roller 6, then this does not bother.

Das Hilfsgerät wird nun abgenommen, und der Anfangsabschnitt des Wattebandes 4 wird über die Walze 7 gelegt und zwischen die Walzen 7 und 8 eingeführt. Dabei sind die Kalanderwalzen nicht mehr gegeneinandergepresst, so dass zwischen den Walzen 7 und 8 wieder der kleine Spalt vorhanden ist. Das aus dem Spalt zwischen den Walzen 7 und 8 nach unten austretende Watteband 4 läuft dann auf den Umfang der Wickelwalze 2 (Fig. 1) auf und wird von diesem zum Wattewickel 1 mitgenommen.The auxiliary device is now removed and the initial section of the cotton tape 4 is placed over the roller 7 and inserted between the rollers 7 and 8. The calender rolls are no longer pressed against each other, so that there is again a small gap between the rolls 7 and 8. The cotton tape 4 emerging downward from the gap between the rollers 7 and 8 then runs onto the circumference of the winding roller 2 (FIG. 1) and is taken by it to the cotton roll 1.

Claims (13)

1. A method of drawing in a lap sheet between calender rollers of a lap winder, characterised in that a plate (11), of which at least a front part (15) is curved shell-fashion around an axis (A), is introduced by way of a front edge (12) into the gap between two adjacent calender rollers (5, 6) and is moved around one (6) of the two rollers until it engages into the gap between said roller and a third (7) of the calender rollers, and that an initial part of the lap sheet (4) is placed on a flexible flat structure (14) which is made of foil and/or cloth and which is secured to a rear edge (13) of the plate (11), whereupon the plate (11) and the flat structure (14) are advanced until the flat structure (14) has passed through the second-mentioned gap (6-7).
2. A method according to Claim 1, characterised in that to produce the advance the calender rollers (5, 6, 7, 8) are pressed against one another and driven.
3. A method according to Claim 1 or 2, characterised in that the plate (11) has a substantially plane rear end portion (16).
4. A method according to Claim 3, characterised in that the substantially plane rear end portion (16) of the plate (11), considered in the direction of movement of the plate ― i.e. perpendicularly to the axis (A) ― has a length (d) of 20 to 70% of the radius (R) of curvature of the front part (15) of the plate (11).
5. A method according to Claims 1-4, characterised in that the plate (11) or the curved front part (15) thereof extends, considered from the axis (A), at an angle (a) of 190° to 230°, preferably approximately 210°.
6. A method according to any of Claims 1-5, characterised in that the plate (11) is made of plastics, preferably polyvinylchloride of a thickness of 1 to 2.5 mm.
7. A method according to any of Claims 1-6, characterised in that the flexible flat structure (14) has projecting, inclined bristles or fibres or hooks.
8. An auxiliary device for performing the method according to any of Claims 1-7, characterised by a plate (11), of which at least a front part (15) is curved shell-fashion around an axis, and a flexible flat structure (14) which is made of foil and/or cloth and which is secured to a rear edge (13) of the plate (11).
9. A device according to Claim 8, characterised in that the plate (11) comprises, before the said rear edge (13), a substantially plane rear end portion (16).
10. A device according to Claim 9, characterised in that the substantially plane, rear end portion (16) of the plate (11), perpendicularly to the axis (A), has a length (d) of 20 to 70% of the radius (R) of curvature of the front part (15) of the plate (11).
11. A device according to any of Claims 8-10, characterised in that the plate (11) or the curved front part (15) thereof extends, considered from the axis (A), at an angle (α) of 190° to 230°, preferably approximately 210°.
12. A device according to any of Claims 8-11, characterised in that the plate (11) is made of plastics, preferably polyvinylchloride of a thickness of 1 to 2.5 mm.
13. A device according any of Claims 8-12, characterised in the the flexible flat structure (14) has projecting, inclined bristles or fibres or hooks.
EP89109498A 1988-06-06 1989-05-26 Method for inserting a fibre web into the pressing rolls of a lap-forming machine Expired - Lifetime EP0345558B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH214988 1988-06-06
CH2149/88 1988-06-06

Publications (2)

Publication Number Publication Date
EP0345558A1 EP0345558A1 (en) 1989-12-13
EP0345558B1 true EP0345558B1 (en) 1992-01-08

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Family Applications (1)

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EP89109498A Expired - Lifetime EP0345558B1 (en) 1988-06-06 1989-05-26 Method for inserting a fibre web into the pressing rolls of a lap-forming machine

Country Status (5)

Country Link
US (1) US5001976A (en)
EP (1) EP0345558B1 (en)
JP (1) JPH0233328A (en)
DD (1) DD287536A5 (en)
DE (1) DE58900690D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630922A1 (en) * 1996-07-31 1998-02-05 Rieter Ag Maschf Winding device
DE19904180C1 (en) * 1999-02-03 2000-08-31 Voith Sulzer Papiertech Patent calender
CH695500A5 (en) * 2002-02-27 2006-06-15 Rieter Ag Maschf Cotton web feeding machine for wrapping fixture arrangement, has openings provided on circumference of cylindrical rollers and disembogue into rollers cavity, and valve, conduits, hole and coupler connecting cavity with low pressure source
CH695690A5 (en) * 2002-07-25 2006-07-31 Rieter Ag Maschf Drive for calender rolls.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR368252A (en) * 1905-07-25 1906-11-23 Jean Hellich Safety device for automatically starting the winding of the web around the mandrel, on openers, beaters and similar machines
NL74499C (en) * 1950-01-23
FR1038111A (en) * 1950-06-05 1953-09-25 Rieter Joh Jacob & Cie Ag Method and device for forming webs of textile fibers
US2776605A (en) * 1952-02-29 1957-01-08 Mcafoos Herbert Ward Threading device for calender rollers
CA639680A (en) * 1958-12-04 1962-04-10 Aktiebolaget Svenska Flaktfabriken Method and apparatus for so-called threading of a web-like material
US3462054A (en) * 1967-03-20 1969-08-19 Eastman Kodak Co Multiple strip leader
US4110774A (en) * 1976-11-08 1978-08-29 Kreonite, Inc. Film guide for film processing equipment
IN161192B (en) * 1983-10-10 1987-10-17 Rieter Ag Maschf
US4693405A (en) * 1985-02-07 1987-09-15 Ross Pulp And Paper Inc. Threading belt for pulp floater dryers

Also Published As

Publication number Publication date
DD287536A5 (en) 1991-02-28
DE58900690D1 (en) 1992-02-20
JPH0233328A (en) 1990-02-02
US5001976A (en) 1991-03-26
EP0345558A1 (en) 1989-12-13

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