EP0379726A1 - Cleaning machine for textile fibres - Google Patents

Cleaning machine for textile fibres Download PDF

Info

Publication number
EP0379726A1
EP0379726A1 EP89123946A EP89123946A EP0379726A1 EP 0379726 A1 EP0379726 A1 EP 0379726A1 EP 89123946 A EP89123946 A EP 89123946A EP 89123946 A EP89123946 A EP 89123946A EP 0379726 A1 EP0379726 A1 EP 0379726A1
Authority
EP
European Patent Office
Prior art keywords
cleaning machine
air
dust
roller
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89123946A
Other languages
German (de)
French (fr)
Other versions
EP0379726B1 (en
Inventor
René Schmid
Jürg Koller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0379726A1 publication Critical patent/EP0379726A1/en
Application granted granted Critical
Publication of EP0379726B1 publication Critical patent/EP0379726B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/04—Opening or cleaning fibres, e.g. scutching cotton by means of beater arms

Definitions

  • the invention relates to a cleaning machine for textile fibers transported in a conveying air flow, with a horizontal roller with impact elements, under the underside of which bar gratings are arranged and over the top of which an inlet at one end of the roller and an outlet for the conveying air flow and at the other end delimited transfer chambers for the air flow rotating about the roller axis are arranged between the inlet and the outlet of guide plates inclined to the roller axis.
  • At least one such cleaning machine is known and available on the market. It serves to dissolve the fiber flakes supplied in the conveying air flow and to remove impurities from them.
  • the fiber material is dragged over the bar gratings and also tapped to a certain extent by the impact on the walls delimiting the transfer chambers, as a result of which contaminants are detached from the material.
  • Coarse contaminants e.g. Shell parts, pass through the bar grids and are then suctioned off. Fine, dust-like contaminants, however, remain in the known machines at least partially in the conveying air flow and then leave the machine together with the fiber material transported by the conveying air flow.
  • the object of the invention is to design the cleaning machine specified at the outset in such a way that it can largely separate even fine, dust-like impurities from the fiber material.
  • the object has been achieved according to the invention in that the transfer chambers are at least partially covered with an air- and dust-permeable wall, over which a hood connects at least one vacuum chamber connected to a suction line forms is.
  • Air can be sucked out of the transfer chambers through the air- and dust-permeable wall of the transfer chambers, with which the very light, dust-like dirt particles can be separated from the conveying air flow transporting the fiber material.
  • the air and dust permeable wall of the transfer chambers is, for example, a sieve or a perforated plate with holes of approximately 1.5 mm in diameter.
  • each transfer chamber - or possibly in one or some of the transfer chambers - it can form at least part of the cover.
  • the vacuum chamber can be assigned to all transfer chambers together; however, it is also possible to arrange separate vacuum chambers for each of the transfer chambers or for each of some of the transfer chambers.
  • Means are preferably provided for adjusting the negative pressure in the negative pressure chamber or the negative pressure chambers or the amount of air drawn off by them, e.g. an adjustable throttle valve in the suction line or between it and the vacuum chamber. If there are several separate vacuum chambers, each of them can also be assigned its own throttle element (flap, slide or the like).
  • the coarse cleaning machine shown in FIGS. 1 to 3 has an opening roller 1 which is rotatably mounted in a housing 2 about a horizontal axis and the circumference of which is occupied in the usual way with striking pins 3.
  • the roller 1 is rotated in operation by a drive motor, not shown, in the direction of the arrow in FIG. 1.
  • Two bar grids 4 and 5, which are only shown in FIG. 1, are arranged under the underside of the roller 1.
  • the top of the roller 1 is covered at a distance from the circumference of the roller with a wall, of which a horizontal, central section 6 and two laterally adjoining, approximately 45 o inclined side sections 7 and 8 are permeable to air and dust.
  • the three wall sections 6, 7 and 8 are arranged like a terrace roof, that is to say in cross section approximately like three sides of an isosceles trapezoid, and two of the wall sections each form an angle ( ⁇ ) of approximately 135 ° .
  • the wall sections 6, 7 and 8 are formed, for example, by a perforated plate with holes of approximately 1.5 mm in diameter or by a sieve.
  • An inlet line 9 opens into the wall section 7 at one end of the roller 1
  • an outlet line 10 opens into the wall section 8 at the other end of the roller 1.
  • a hood formed by an upper part 2a of the housing 2 delimits a vacuum chamber 14 above the wall with the wall sections 6, 7, 8, to which a suction line 15 is connected.
  • the coarse cleaning machine has flake-like textile fibers to be cleaned and dissolved supplied in a conveying air flow through the inlet line 9.
  • the conveying air with the fiber flakes essentially flows first around the underside of the rotating roller 1, then through the transfer chamber between the guide plates 11 and 12, which moves the air in the direction of the axis of the roller 1, then again around the underside of the roller, then through the transfer chamber between the guide plates 12 and 13 and again around the underside of the roller 1 to finally leave the machine through the outlet line 10.
  • the flakes of fiber are processed and increasingly dissolved by the striking pins 3, and impurities are separated from the fibers.
  • the coarser impurities such as shell parts, are separated through the bar grids 4 and 5 and sucked out of the space under the bar grids by a suction device, not shown. Thereafter, the fiber flakes fly upward into the next transfer chamber, where they are further loosened by hitting the wall sections 6, 7, 8. Fine, dust-like impurities which have been separated from the fibers can at most be partially sucked off through the bar grids 4 and 5, while a large part of the dust remains in the conveying air flow.
  • the air and dust-permeable wall sections 6, 7, 8, the vacuum chamber 14 and the suction line 15 serve to separate these fine impurities from the conveying air flow, so that they cannot ultimately exit through the outlet line 10 together with the fibers.
  • the suction line 15 is connected to a vacuum source or suction device, not shown, which sucks air laden with dust through the wall sections 6, 7, 8.
  • the size of the negative pressure generated in the negative pressure chamber 14 or of the air flow sucked through the wall sections 6, 7, 8 is adjustable, at for example in that the vacuum source or suction device is adjustable, or in that an adjustable throttle element, for example an adjustable throttle valve 16, is arranged in the suction line 15.
  • the air flow is adjusted so that it is sufficient to suction the dust through the line 15, so that the dust is not deposited on the top of the wall sections 6, 7, 8.
  • viewing windows 17 are provided in the upper housing part 2a, for example as indicated in FIG. 1 on the upper side thereof. It may also be expedient to arrange at least one purge air inlet 18 in the upper housing part 2a, through which purge air can be sucked into the vacuum chamber 14 from the surroundings.
  • the purge air inlets 18 also contain adjustable throttle elements, for example throttle valves 19 (FIG. 2).
  • the underside of the air- and dust-permeable wall sections 6, 7, 8 is always kept clean by the conveying air flow flowing through the transfer chambers or by the fiber flakes transported by it. If the wall sections 6, 7, 8 are perforated, then the holes on the underside of the wall sections should not have any sharp edges so that no fibers or contaminants can get caught on these edges.
  • the wall sections 6, 7, 8 can expediently be formed by a perforated plate which has a galvanic coating on the underside. The coating then extends - with a rounded surface - somewhat into the holes.
  • the wall sections 6, 7, 8 are essentially permeable to air and dust over their entire surface.
  • FIG. 4 One can see again the three guide plates 11, 12 and 13, which delimit two transfer chambers above the top of the roller 1, which are covered with a wall that is permeable to air and dust. From this wall sections 6 'and 7' are visible. Above the wall, two vacuum chambers 20 and 21 are formed, which are delimited by partitions 22, 23 and 24.
  • the partition walls 22, 23 and 24 are aligned with the guide plates 11, 12 and 13, so that each of the vacuum chambers 20 and 21 is aligned with one of the two transfer chambers.
  • the vacuum chambers 20 and 21 are each connected via an outlet 25 or 26, in each of which an adjustable throttle valve is arranged, with a suction line 15 '.

Landscapes

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

Abstract

Die Maschine besitzt eine liegende, mit Schlagstiften (3) besetzte Walze (1), unter deren Unterseite Stabroste (4, 5) angeordnet sind. Ueber der Oberseite der Walze (1) münden bei einem Ende derselben eine Einlassleitung (9) und beim anderen Ende eine Auslassleitung (10) für einen die Textilfasern in Flockenform transportierenden Förderluftstrom. Zwischen den Mündungen der Einlassleitung (9) und der Auslassleitung (10) sind über der Oberseite der Walze (1) schräg gestellte Leitplatten (11) angeordnet. Die Leitplatten (11) begrenzen Ueberleitkammern, welche den Förderluftstrom in Richtung der Achse der Walze (1) weiterbewegen. Die Ueberleitkammern sind mit einer luft- und staubdurchlässigen Wand (6, 7, 8) abgedeckt, über welcher eine an eine Saugleitung (15) angeschlossene Unterdruckkammer (14) liegt. Die Maschine kann damit aus dem Faserflokkenstrom nicht nur gröbere Verunreinigungen durch die Stabroste (4, 5) hindurch abscheiden, sondern auch feine, staubförmige Verunreinigungen, die durch die luft- und staubdurchlässige Wand (6, 7, 8) hindurch in die Unterdruckkammer (14) und dann in die Saugleitung (15) gesaugt werden.The machine has a horizontal roller (1) with impact pins (3), under the underside of which bar grids (4, 5) are arranged. Above the top of the roller (1) an inlet line (9) opens at one end thereof and an outlet line (10) at the other end for a conveying air flow that transports the textile fibers in flake form. Between the mouths of the inlet line (9) and the outlet line (10), slanted guide plates (11) are arranged above the top of the roller (1). The guide plates (11) delimit transfer chambers which move the conveying air flow further in the direction of the axis of the roller (1). The transfer chambers are covered with an air- and dust-permeable wall (6, 7, 8), over which lies a vacuum chamber (14) connected to a suction line (15). The machine can not only separate coarse impurities through the rod grates (4, 5) from the fiber flake stream, but also fine, dust-like impurities that pass through the air and dust-permeable wall (6, 7, 8) into the vacuum chamber (14 ) and then sucked into the suction line (15).

Description

Die Erfindung bezieht sich auf eine Reinigungs­maschine für in einem Förderluftstrom transportierte Textilfasern, mit einer liegenden, mit Schlagelementen besetzten Walze, unter deren Unterseite Stabroste ange­ordnet sind und über deren Oberseite bei einem Ende der Walze ein Einlass und beim anderen Ende ein Auslass für den Förderluftstrom und zwischen dem Einlass und dem Auslass von zur Walzenachse schräg gestellten Leitplat­ten begrenzte Ueberleitkammern für den um die Walzen­achse drehenden Luftstrom angeordnet sind.The invention relates to a cleaning machine for textile fibers transported in a conveying air flow, with a horizontal roller with impact elements, under the underside of which bar gratings are arranged and over the top of which an inlet at one end of the roller and an outlet for the conveying air flow and at the other end delimited transfer chambers for the air flow rotating about the roller axis are arranged between the inlet and the outlet of guide plates inclined to the roller axis.

Mindestens eine solche Reinigungsmaschine ist be­kannt und auf dem Markt erhältlich. Sie dient dazu, die im Förderluftstrom zugeführten Faserflocken aufzulösen und Verunreinigungen daraus zu entfernen. Das Faserma­terial wird über die Stabroste geschleppt und auch durch den Aufprall auf die die Ueberleitkammern begrenzenden Wände gewissermassen geklopft, wodurch Verunreinigungen von dem Material gelöst werden. Gröbere Verunreinigun­gen, wie z.B. Schalenteile, treten durch die Stabroste hindurch und werden dann abgesaugt. Feine, staubförmige Verunreinigungen verbleiben jedoch in den bekannten Ma­schinen mindestens teilweise im Förderluftstrom und verlassen dann die Maschine zusammen mit dem vom Förder­luftstrom transportierten Fasermaterial.At least one such cleaning machine is known and available on the market. It serves to dissolve the fiber flakes supplied in the conveying air flow and to remove impurities from them. The fiber material is dragged over the bar gratings and also tapped to a certain extent by the impact on the walls delimiting the transfer chambers, as a result of which contaminants are detached from the material. Coarse contaminants, e.g. Shell parts, pass through the bar grids and are then suctioned off. Fine, dust-like contaminants, however, remain in the known machines at least partially in the conveying air flow and then leave the machine together with the fiber material transported by the conveying air flow.

Die Aufgabe der Erfindung besteht nun darin, die eingangs angegebene Reinigungsmaschine derart auszubil­den, dass sie auch feine, staubförmige Verunreinigungen weitgehend von dem Fasermaterial abscheiden kann.The object of the invention is to design the cleaning machine specified at the outset in such a way that it can largely separate even fine, dust-like impurities from the fiber material.

Die Aufgabe ist erfindungsgemäss dadurch gelöst worden, dass die Ueberleitkammern mindestens teilweise mit einer luft- und staubdurchlässigen Wand abgedeckt sind, über welcher durch eine Haube mindestens eine an eine Saugleitung angeschlossene Unterdruckkammer ge­ bildet ist.The object has been achieved according to the invention in that the transfer chambers are at least partially covered with an air- and dust-permeable wall, over which a hood connects at least one vacuum chamber connected to a suction line forms is.

Durch die luft- und staubdurchlässige Wand der Ueberleitkammern hindurch kann aus den Ueberleitkammern Luft abgesaugt werden, mit welcher die sehr leichten, staubförmigen Schmutzteilchen aus dem das Fasermaterial transportierenden Förderluftstrom abgeschieden werden können.Air can be sucked out of the transfer chambers through the air- and dust-permeable wall of the transfer chambers, with which the very light, dust-like dirt particles can be separated from the conveying air flow transporting the fiber material.

Die luft- und staubdurchlässige Wand der Ueberleit­kammern ist beispielsweise ein Sieb oder ein Lochblech mit Löchern von etwa 1,5 mm Durchmesser. Sie kann bei jeder Ueberleitkammer - oder gegebenenfalls bei einer oder einigen der Ueberleitkammern - jeweils wenigstens einen Teil der Abdeckung bilden.The air and dust permeable wall of the transfer chambers is, for example, a sieve or a perforated plate with holes of approximately 1.5 mm in diameter. In each transfer chamber - or possibly in one or some of the transfer chambers - it can form at least part of the cover.

Die Unterdruckkammer kann allen Ueberleitkammern gemeinsam zugeordnet sein; es ist aber auch möglich, getrennte Unterdruckkammern für jede der Ueberleitkam­mern oder für jeweils einige der Ueberleitkammern anzu­ordnen. Vorzugsweise sind Mittel vorgesehen zum Einstel­len des Unterdrucks in der Unterdruckkammer oder den Unterdruckkammern bzw. der durch diese abgesaugten Luft­menge, z.B. eine einstellbare Drosselklappe in der Saug­leitung oder zwischen dieser und der Unterdruckkammer. Wenn mehrere getrennte Unterdruckkammern vorhanden sind, kann auch jeder derselben ein eigenes Drosselorgan (Klappe, Schieber o.dgl.) zugeordnet sein.The vacuum chamber can be assigned to all transfer chambers together; however, it is also possible to arrange separate vacuum chambers for each of the transfer chambers or for each of some of the transfer chambers. Means are preferably provided for adjusting the negative pressure in the negative pressure chamber or the negative pressure chambers or the amount of air drawn off by them, e.g. an adjustable throttle valve in the suction line or between it and the vacuum chamber. If there are several separate vacuum chambers, each of them can also be assigned its own throttle element (flap, slide or the like).

Ausführungsbeispiele der erfindungsgemässen Reinigungsmaschine werden nachstehend anhand der Zeich­nung näher erläutert. In dieser zeigen:

  • Fig. 1 einen schematischen Vertikalschnitt durch eine Grobreinigungsmaschine,
  • Fig. 2 eine Draufsicht zu Fig. 1 im Schnitt nach der Linie II-II in Fig. 1,
  • Fig. 3 einen zu Fig. 1 senkrechten Vertikalschnitt durch die Maschine und
  • Fig. 4 einen Teilschnitt ähnlich Fig. 3 für eine abgeänderte Ausführungsform der Grobreinigungsmaschine.
Exemplary embodiments of the cleaning machine according to the invention are explained in more detail below with reference to the drawing. In this show:
  • 1 is a schematic vertical section through a coarse cleaning machine,
  • 2 is a plan view of FIG. 1 in section along the line II-II in Fig. 1,
  • 3 a vertical section through FIG. 1 through the machine and
  • Fig. 4 is a partial section similar to FIG. 3 for a modified embodiment of the coarse cleaning machine.

Die in den Fig. 1 bis 3 dargestellte Grobreini­gungsmaschine besitzt eine Auflösewalze 1, die in einem Gehäuse 2 um eine horizontale Achse drehbar gelagert ist und deren Umfang in üblicher Weise mit Schlagstiften 3 besetzt ist. Die Walze 1 wird im Betrieb von einem nicht dargestellten Antriebsmotor in Pfeilrichtung ge­mäss Fig. 1 gedreht. Unter der Unterseite der Walze 1 sind zwei nur in Fig. 1 dargestellte Stabroste 4 und 5 angeordnet. Die Oberseite der Walze 1 ist im Abstand vom Walzenumfang mit einer Wand überdeckt, von der ein horizontaler, mittlerer Abschnitt 6 und zwei seitlich an diesen anschliessende, etwa 45o geneigte Seitenab­schnitte 7 und 8 Luft- und staubdurchlässig sind. Die drei Wandabschnitte 6, 7 und 8 sind terrassendachartig angeordnet, das heisst im Querschnitt etwa wie drei Seiten eines gleichschenkligen Trapezes, und je zwei der Wandabschnitte schliessen miteinander jeweils einen Winkel (α) von etwa 135o ein. Die Wandabschnitte 6, 7 und 8 sind beispielsweise von einem Lochblech mit Lö­chern von etwa 1,5 mm Durchmesser oder von einem Sieb gebildet. In den Wandabschnitt 7 mündet bei einem Ende der Walze 1 von oben eine Einlassleitung 9, und in den Wandabschnitt 8 mündet beim anderen Ende der Walze 1 eine Auslassleitung 10. Zwischen den Mündungen der Ein­lassleitung 9 und der Auslassleitung 10 sind über der Oberseite der Walze 1, unterhalb der Wandabschnitte 6, 7, 8, drei zur Achse der Walze 1 schräg gestellte Leit­bleche 11, 12 und 13 angeordnet, welche zwei Ueberleit­kammern zwischen der Oberseite der Walze 1 und der Wand mit den Wandabschnitten 6, 7, 8 begrenzen. Eine von einem Oberteil 2a des Gehäuses 2 gebildete Haube be­grenzt über der Wand mit den Wandabschnitten 6, 7, 8 eine Unterdruckkammer 14, an welche eine Saugleitung 15 angeschlossen ist.The coarse cleaning machine shown in FIGS. 1 to 3 has an opening roller 1 which is rotatably mounted in a housing 2 about a horizontal axis and the circumference of which is occupied in the usual way with striking pins 3. The roller 1 is rotated in operation by a drive motor, not shown, in the direction of the arrow in FIG. 1. Two bar grids 4 and 5, which are only shown in FIG. 1, are arranged under the underside of the roller 1. The top of the roller 1 is covered at a distance from the circumference of the roller with a wall, of which a horizontal, central section 6 and two laterally adjoining, approximately 45 o inclined side sections 7 and 8 are permeable to air and dust. The three wall sections 6, 7 and 8 are arranged like a terrace roof, that is to say in cross section approximately like three sides of an isosceles trapezoid, and two of the wall sections each form an angle (α) of approximately 135 ° . The wall sections 6, 7 and 8 are formed, for example, by a perforated plate with holes of approximately 1.5 mm in diameter or by a sieve. An inlet line 9 opens into the wall section 7 at one end of the roller 1, and an outlet line 10 opens into the wall section 8 at the other end of the roller 1. Between the mouths of the inlet line 9 and the outlet line 10 are above the top of the roller 1 , below the wall sections 6, 7, 8, three baffles 11, 12 and 13 arranged obliquely to the axis of the roller 1, which delimit two transfer chambers between the top of the roller 1 and the wall with the wall sections 6, 7, 8. A hood formed by an upper part 2a of the housing 2 delimits a vacuum chamber 14 above the wall with the wall sections 6, 7, 8, to which a suction line 15 is connected.

Im Betrieb werden der Grobreinigungsmaschine zu reinigende und aufzulösende Textilfasern in Flockenform in einem Förderluftstrom durch die Einlassleitung 9 zu­geführt. Die Förderluft mit den Faserflocken strömt im wesentlichen zunächst um die Unterseite der drehen­den Walze 1 herum, dann durch die Ueberleitkammer zwi­schen den Leitblechen 11 und 12, welche die Luft in Richtung der Achse der Walze 1 weiterbewegt, dann wie­der um die Unterseite der Walze, dann durch die Ueber­leitkammer zwischen den Leitblechen 12 und 13 und wie­der um die Unterseite der Walze 1, um die Maschine schliesslich durch die Auslassleitung 10 zu verlassen. Beim Herumlaufen um die Unterseite der Walze 1 werden die Faserflocken durch die Schlagstifte 3 bearbeitet und zunehmend aufgelöst, und Verunreinigungen werden von den Fasern getrennt. Die gröberen Verunreinigungen, wie z.B. Schalenteile, werden durch die Stabroste 4 und 5 hindurch abgeschieden und aus dem Raum unter den Stab­rosten durch eine nicht dargestellte Absaugeinrichtung abgesaugt. Danach fliegen die Faserflocken jeweils nach oben in die nächstfolgende Ueberleitkammer, wo sie durch Aufprallen auf die Wandabschnitte 6, 7, 8 weiter gelok­kert werden. Feine, staubförmige Verunreinigungen, die von den Fasern getrennt worden sind, können höchstens teilweise durch die Stabroste 4 und 5 hindurch abgesaugt werden, während ein grosser Teil des Staubes im Förder­luftstrom verbleibt. Die luft- und staubdurchlässigen Wandabschnitte 6, 7, 8, die Unterdruckkammer 14 und die Saugleitung 15 dienen dazu, auch diese feinen Verunrei­nigungen vom Förderluftstrom zu trennen, so dass sie nicht am Ende mit diesem und den Fasern durch die Aus­lassleitung 10 austreten können. Die Saugleitung 15 ist an eine nicht dargestellte Unterdruckquelle bzw. Absaug­einrichtung angeschlossen, welche mit Staub beladene Luft durch die Wandabschnitte 6, 7, 8 hindurch absaugt.In operation, the coarse cleaning machine has flake-like textile fibers to be cleaned and dissolved supplied in a conveying air flow through the inlet line 9. The conveying air with the fiber flakes essentially flows first around the underside of the rotating roller 1, then through the transfer chamber between the guide plates 11 and 12, which moves the air in the direction of the axis of the roller 1, then again around the underside of the roller, then through the transfer chamber between the guide plates 12 and 13 and again around the underside of the roller 1 to finally leave the machine through the outlet line 10. When running around the underside of the roller 1, the flakes of fiber are processed and increasingly dissolved by the striking pins 3, and impurities are separated from the fibers. The coarser impurities, such as shell parts, are separated through the bar grids 4 and 5 and sucked out of the space under the bar grids by a suction device, not shown. Thereafter, the fiber flakes fly upward into the next transfer chamber, where they are further loosened by hitting the wall sections 6, 7, 8. Fine, dust-like impurities which have been separated from the fibers can at most be partially sucked off through the bar grids 4 and 5, while a large part of the dust remains in the conveying air flow. The air and dust-permeable wall sections 6, 7, 8, the vacuum chamber 14 and the suction line 15 serve to separate these fine impurities from the conveying air flow, so that they cannot ultimately exit through the outlet line 10 together with the fibers. The suction line 15 is connected to a vacuum source or suction device, not shown, which sucks air laden with dust through the wall sections 6, 7, 8.

Die Grösse des in der Unterdruckkammer 14 erzeug­ten Unterdrucks bzw. des durch die Wandabschnitte 6, 7, 8 hindurch abgesaugten Luftstroms ist einstellbar, bei­ spielsweise dadurch, dass die Unterdruckquelle bzw. Ab­saugeinrichtung einstellbar ist, oder dadurch, dass in der Saugleitung 15 ein einstellbares Drosselorgan, z.B. wie gezeichnet eine einstellbare Drosselklappe 16, an­geordnet ist. Der Luftstrom wird so eingestellt, dass er ausreicht, um den Staub durch die Leitung 15 abzu­saugen, so dass sich der Staub nicht auf der Oberseite der Wandabschnitte 6, 7, 8 ablagert. Um das beobachten zu können, sind im Gehäuseoberteil 2a, z.B. wie in Fig. 1 angedeutet auf dessen Oberseite, Sichtfenster 17 vorgesehen. Es kann ferner zweckmässig sein, im Gehäuse­oberteil 2a wenigstens einen Spüllufteinlass 18 anzu­ordnen, durch welchen aus der Umgebung Spülluft in die Unterdruckkammer 14 gesaugt werden kann. Die Spülluft­einlässe 18 enthalten ebenfalls einstellbare Drossel­organe, z.B. Drosselklappen 19 (Fig. 2).The size of the negative pressure generated in the negative pressure chamber 14 or of the air flow sucked through the wall sections 6, 7, 8 is adjustable, at for example in that the vacuum source or suction device is adjustable, or in that an adjustable throttle element, for example an adjustable throttle valve 16, is arranged in the suction line 15. The air flow is adjusted so that it is sufficient to suction the dust through the line 15, so that the dust is not deposited on the top of the wall sections 6, 7, 8. In order to be able to observe this, viewing windows 17 are provided in the upper housing part 2a, for example as indicated in FIG. 1 on the upper side thereof. It may also be expedient to arrange at least one purge air inlet 18 in the upper housing part 2a, through which purge air can be sucked into the vacuum chamber 14 from the surroundings. The purge air inlets 18 also contain adjustable throttle elements, for example throttle valves 19 (FIG. 2).

Die Unterseite der luft- und staubdurchlässigen Wandabschnitte 6, 7, 8 wird durch den durch die Ueber­leitkammern strömenden Förderluftstrom bzw. durch die von diesem transportierten Faserflocken stets sauber gehalten. Wenn die Wandabschnitte 6, 7, 8 perforiert sind, dann sollten die Löcher an der Unterseite der Wandabschnitte keine scharfen Kanten aufweisen, damit an diesen Kanten keine Fasern oder Verunreinigungen hängen bleiben können. Die Wandabschnitte 6, 7, 8 kön­nen zweckmässig von einem Lochblech gebildet sein, das an der Unterseite einen galvanischen Ueberzug aufweist. Der Ueberzug erstreckt sich dann - mit einer gerundeten Oberfläche - etwas in die Löcher hinein.The underside of the air- and dust-permeable wall sections 6, 7, 8 is always kept clean by the conveying air flow flowing through the transfer chambers or by the fiber flakes transported by it. If the wall sections 6, 7, 8 are perforated, then the holes on the underside of the wall sections should not have any sharp edges so that no fibers or contaminants can get caught on these edges. The wall sections 6, 7, 8 can expediently be formed by a perforated plate which has a galvanic coating on the underside. The coating then extends - with a rounded surface - somewhat into the holes.

In der beschriebenen Ausführungsform der Grobrei­nigungsmaschine sind die Wandabschnitte 6, 7, 8 im we­sentlichen auf ihrer ganzen Fläche luft- und staub­durchlässig. Es ist aber natürlich auch möglich, die Wandabschnitte 6, 7, 8 nur stellenweise luft- und staub­durchlässig auszubilden, z.B. nur über einer der von den Leitblechen 11, 12 und 13 begrenzten Ueberleitkam­ mern oder nur über einem Teil der Länge dieser Kammern (in Richtung des Förderluftstroms durch die Kammern ge­sehen).In the described embodiment of the coarse cleaning machine, the wall sections 6, 7, 8 are essentially permeable to air and dust over their entire surface. However, it is of course also possible to make the wall sections 6, 7, 8 only partially permeable to air and dust, for example only over one of the transfer lines delimited by the guide plates 11, 12 and 13 or only over part of the length of these chambers (viewed in the direction of the conveying air flow through the chambers).

In einer anderen Variante können anstelle der in den Fig. 1 und 3 gezeigten einzigen Unterdruckkammer 14, die allen Ueberleitkammern gemeinsam zugeordnet ist, auch mehrere getrennte Unterdruckkammern vorgesehen sein, die je einer (oder ggf. einigen) der Ueberleit­kammern zugeordnet sind. Eine solche Variante ist in Fig. 4 dargestellt. Man sieht dort wieder die drei Leit­bleche 11, 12 und 13, welche über der Oberseite der Wal­ze 1 zwei Ueberleitkammern begrenzen, die mit einer luft- und staubdurchlässigen Wand abgedeckt sind. Von dieser Wand sind Abschnitte 6′ und 7′ sichtbar. Ueber der Wand sind zwei Unterdruckkammern 20 und 21 gebil­det, die von Trennwänden 22, 23 und 24 begrenzt sind. Die Trennwände 22, 23 und 24 fluchten mit den Leitble­chen 11, 12 und 13, so dass jede der Unterdruckkammern 20 und 21 auf eine der beiden Ueberleitkammern ausge­richtet ist. Die Unterdruckkammern 20 und 21 sind über je einen Auslass 25 bzw. 26, in welchem jeweils eine einstellbare Drosselklappe angeordnet ist, mit einer Saugleitung 15′ verbunden.In another variant, instead of the single vacuum chamber 14 shown in FIGS. 1 and 3, which is assigned to all transfer chambers in common, a plurality of separate vacuum chambers can also be provided, each of which is assigned to one (or possibly some) of the transfer chambers. Such a variant is shown in FIG. 4. One can see again the three guide plates 11, 12 and 13, which delimit two transfer chambers above the top of the roller 1, which are covered with a wall that is permeable to air and dust. From this wall sections 6 'and 7' are visible. Above the wall, two vacuum chambers 20 and 21 are formed, which are delimited by partitions 22, 23 and 24. The partition walls 22, 23 and 24 are aligned with the guide plates 11, 12 and 13, so that each of the vacuum chambers 20 and 21 is aligned with one of the two transfer chambers. The vacuum chambers 20 and 21 are each connected via an outlet 25 or 26, in each of which an adjustable throttle valve is arranged, with a suction line 15 '.

Letztlich besteht auch die Möglichkeit, die Wand­stärke d der Wandabschnitte 6, 7, 8 derart zu wählen, dass diese Wandabschnitte im Betrieb, infolge ihrer ab­gewinkelten Anordnung, durch den Aufprall des im Förder­luftstrom transportierten Fasermaterials in Vibrationen versetzt werden.Ultimately, there is also the possibility of choosing the wall thickness d of the wall sections 6, 7, 8 in such a way that, during operation, due to their angled arrangement, these wall sections are vibrated by the impact of the fiber material transported in the conveying air flow.

Claims (9)

1. Reinigungsmaschine für in einem Förderluft­strom transportierte Textilfasern, mit einer liegenden, mit Schlagelementen(3) besetzten Walze (1), unter deren Unterseite Stabroste (4, 5) angeordnet sind und über de­ren Oberseite bei einem Ende der Walze ein Einlass (9) und beim anderen Ende ein Auslass (10) für den Förder­luftstrom und zwischen dem Einlass (9) und dem Auslass (10) von zur Walzenachse schräg gestellten Leitplatten (11, 12, 13) begrenzte Ueberleitkammern für den um die Walzenachse drehenden Luftstrom angeordnet sind, da­durch gekennzeichnet, dass die Ueberleitkammern (11-12, 12-13) mindestens teilweise mit einer luft- und staub­durchlässigen Wand (6, 7, 8) abgedeckt sind, über wel­cher durch eine Haube (2a) mindestens eine an eine Saug­leitung (15; 15′) angeschlossene Unterdruckkammer (14; 20, 21) gebildet ist.1. Cleaning machine for textile fibers transported in a conveying air stream, with a horizontal roller (1) with impact elements (3), under the underside of which bar grids (4, 5) are arranged and over the top of which an inlet (9) at one end of the roller and at the other end there is an outlet (10) for the conveying air flow and between the inlet (9) and the outlet (10) of guide plates (11, 12, 13) bounded at an angle to the roller axis for the air stream rotating about the roller axis, characterized in that the transfer chambers (11-12, 12-13) are at least partially covered with an air- and dust-permeable wall (6, 7, 8) over which at least one is connected to a suction line (15; 15 ') connected vacuum chamber (14; 20, 21) is formed. 2. Reinigungsmaschine nach Anspruch 1, gekenn­zeichnet durch Mittel (16) zum Einstellen der Höhe des Unterdrucks in der bzw. jeder Unterdruckkammer (14; 20, 21).2. Cleaning machine according to claim 1, characterized by means (16) for adjusting the level of the vacuum in the or each vacuum chamber (14; 20, 21). 3. Reinigungsmaschine nach Anspruch 2, dadurch gekennzeichnet, dass die genannten Mittel mindestens ein einstellbares Drosselorgan, z.B. eine Drosselklappe (16), enthalten.3. Cleaning machine according to claim 2, characterized in that the said means at least one adjustable throttle element, e.g. a throttle valve (16) included. 4. Reinigungsmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Haube (2a) wenigstens ein Sichtfenster (17) aufweist, durch wel­ches Staubablagerungen auf der luft- und staubdurchläs­sigen Wand (6, 7, 8) beobachtbar sind.4. Cleaning machine according to one of claims 1 to 3, characterized in that the hood (2a) has at least one viewing window (17) through which dust deposits on the air and dust-permeable wall (6, 7, 8) can be observed. 5. Reinigungsmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Haube (2a) wenigstens einen Lufteinlass (18) für die Zufuhr von Spülluft in die Unterdruckkammer (14) bzw. in wenig­stens eine der Unterdruckkammern (20, 21) aufweist.5. Cleaning machine according to one of claims 1 to 4, characterized in that the hood (2a) has at least one air inlet (18) for the supply of purge air into the vacuum chamber (14) or at least one of the vacuum chambers (20, 21) . 6. Reinigungsmaschine nach Anspruch 5, dadurch gekennzeichnet, dass im Lufteinlass (18) ein einstellba­res Drosselorgan, z.B. eine Drosselklappe (19), angeord­net ist.6. Cleaning machine according to claim 5, characterized in that in the air inlet (18) an adjustable throttle body, e.g. a throttle valve (19) is arranged. 7. Reinigungsmaschine nach einem der Ansprüche bis 6, dadurch gekennzeichnet, dass die luft- und staubdurchlässige Wand (6, 7, 8) von einem Lochblech gebildet ist, welches auf der von den Textilfasern be­aufschlagten Seite mit einem galvanischen Ueberzug versehen ist.7. Cleaning machine according to one of claims to 6, characterized in that the air and dust permeable wall (6, 7, 8) is formed by a perforated plate which is provided on the side acted upon by the textile fibers with a galvanic coating. 8. Reinigungsmaschine nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die luftdurchläs­sige Wand wenigstens drei terrassendachartig angeord­nete Wandabschnitte (6, 7, 8) aufweist, von denen je zwei miteinander jeweils einen Winkel (α) von vorzugs­weise etwa 135o einschliessen.8. Cleaning machine according to one of claims 1 to 7, characterized in that the air-permeable wall has at least three terrace roof-like wall sections (6, 7, 8), two of which each include an angle (α) of preferably about 135 o . 9. Reinigungsmaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die luftdurchlässi­ge Wand (6, 7, 8) eine Wandstärke (d) aufweist, welche derart gewählt ist, dass die Wand (6, 7, 8) im Betrieb durch den Aufprall des im Förderluftstrom transportier­ten Textilfasermaterials in Vibrationen versetzt wird.9. Cleaning machine according to one of claims 1 to 8, characterized in that the air-permeable wall (6, 7, 8) has a wall thickness (d) which is chosen such that the wall (6, 7, 8) during operation the impact of the textile fiber material transported in the conveying air stream is vibrated.
EP89123946A 1989-01-26 1989-12-27 Cleaning machine for textile fibres Expired - Lifetime EP0379726B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH24289 1989-01-26
CH242/89 1989-01-26

Publications (2)

Publication Number Publication Date
EP0379726A1 true EP0379726A1 (en) 1990-08-01
EP0379726B1 EP0379726B1 (en) 1992-07-22

Family

ID=4182532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123946A Expired - Lifetime EP0379726B1 (en) 1989-01-26 1989-12-27 Cleaning machine for textile fibres

Country Status (4)

Country Link
US (1) US4964196A (en)
EP (1) EP0379726B1 (en)
JP (1) JPH02229220A (en)
DE (1) DE58901892D1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464441A1 (en) * 1990-07-02 1992-01-08 Maschinenfabrik Rieter Ag Method and apparatus for cleaning cotton fibres
US5319830A (en) * 1990-03-23 1994-06-14 Maschinenfabrik Rieter Ag Cleaning machine for textile fibers
DE19630018A1 (en) * 1996-07-25 1998-01-29 Rieter Ag Maschf Assembly especially for use in processing cotton fibre materials
WO2006047897A1 (en) * 2004-11-04 2006-05-11 Maschinenfabrik Rieter Ag Cleansing device for fibre flocks
EP2336405A1 (en) 2009-12-17 2011-06-22 Maschinenfabrik Rieter AG Cleaning device for fiber flock
CN103993392A (en) * 2014-05-26 2014-08-20 江苏双盈纺织科技有限公司 Efficient opener
CN105780200A (en) * 2016-04-13 2016-07-20 吴江澳明纺织品有限公司 Novel cotton slitter
CN106012112A (en) * 2016-08-09 2016-10-12 姚雅珍 Full-automatic opener for garments
EP3431641A1 (en) 2017-07-17 2019-01-23 Maschinenfabrik Rieter AG Cleaning device

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932282A1 (en) * 1989-09-27 1991-04-04 Hollingsworth Gmbh DEVICE FOR OPENING AND CLEANING FIBER GOODS
CH681020A5 (en) * 1990-04-30 1992-12-31 Rieter Ag Maschf
US5237727A (en) * 1990-07-02 1993-08-24 Maschinenfabrik Rieter Ag Adjustable cleaning of fibers in a spiralled air path and apparatus
US5203052A (en) * 1991-06-17 1993-04-20 Phoenix Associates Noise suppression box for fiber processing machinery
EP0810309B1 (en) 1996-05-20 2004-09-29 Maschinenfabrik Rieter Ag Arrangement for the processing of fibres
DE10143671A1 (en) * 2001-09-06 2003-03-27 Truetzschler Gmbh & Co Kg Device on a card, cleaning machine or the like. for textile material
DE102011119171B3 (en) * 2011-11-23 2013-02-21 Khs Gmbh Apparatus for treating containers with a suction device
CN103934240B (en) * 2014-04-29 2016-08-31 北京国兴五佳高分子纤维再生科技有限公司 A kind of dry type deliming machine
CN104032415A (en) * 2014-06-17 2014-09-10 黄祝辉 Dust collection device for being mounted on upper portion of opener
CN107570491A (en) * 2017-10-10 2018-01-12 浙江跃云纺织品有限公司 Dust arrester
CN115652603B (en) * 2022-09-23 2023-09-01 南通如日纺织有限公司 Coating device for coating cloth production

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345749C (en) * 1915-08-22 1921-12-17 Friedrich Emil Max Hilbert Method and device for opening and cleaning fiber material, in particular cotton fibers
FR1220618A (en) * 1958-05-12 1960-05-25 Rieter Joh Jacob & Cie Ag Single drum cleaner-opener
DE3030278A1 (en) * 1980-08-09 1982-02-25 Temafa, Textilmaschinenfabrik Meissner, Morgner & Co Gmbh, 5070 Bergisch Gladbach Raw fibre preparation unit - has an additional grid plate to increase fibre opening and dust release
DE3333750A1 (en) * 1983-09-19 1985-04-18 Trützschler GmbH & Co KG, 4050 Mönchengladbach DEVICE AND METHOD FOR OPENING AND CLEANING FIBER GOODS

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102017A (en) * 1976-03-08 1978-07-25 Foerster Process Systems, Inc. Cotton lint cleaner
FR2360694A1 (en) * 1976-08-03 1978-03-03 Schubert & Salzer Maschinen DEVICE FOR THE REMOVAL OF SOIL FROM A FIBER RAW MATERIAL, IN PARTICULAR COTTON
DE2826908A1 (en) * 1977-06-24 1979-01-18 Platt Saco Lowell Ltd DEVICE FOR OPENING AND CLEANING FIBER MATERIAL AND PROCESS FOR SEPARATING DUST FROM FIBER MATERIAL
AU534972B2 (en) * 1980-07-01 1984-02-23 Ronald Thomas Anderson Wool cleaning beater
US4479286A (en) * 1981-10-15 1984-10-30 The United States of America as represented by the Secretary of _Agriculture Apparatus to extract fine trash and dust during high-velocity discharging of cotton from opener cleaner
US4399260A (en) * 1982-01-04 1983-08-16 The Goodyear Tire & Rubber Company Increasing the reactivity of coupling of block polymers
US4637096A (en) * 1985-10-18 1987-01-20 Wise Industries, Inc. Method and apparatus for cleaning cotton
DE3540259C2 (en) * 1985-11-13 1995-05-11 Truetzschler Gmbh & Co Kg Device for separating from fiber spinning machines, in particular blow room machines and cards, extracted fiber waste and the like. Like impurities
DE3615416A1 (en) * 1986-05-07 1987-11-12 Truetzschler & Co DEVICE FOR CLEANING TEXTILE FIBER FLAKES
DE3711642A1 (en) * 1987-04-07 1988-10-27 Hollingsworth Gmbh DEVICE FOR FINE OPENING AND CLEANING OF FIBER MATERIAL AND THE LIKE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345749C (en) * 1915-08-22 1921-12-17 Friedrich Emil Max Hilbert Method and device for opening and cleaning fiber material, in particular cotton fibers
FR1220618A (en) * 1958-05-12 1960-05-25 Rieter Joh Jacob & Cie Ag Single drum cleaner-opener
DE3030278A1 (en) * 1980-08-09 1982-02-25 Temafa, Textilmaschinenfabrik Meissner, Morgner & Co Gmbh, 5070 Bergisch Gladbach Raw fibre preparation unit - has an additional grid plate to increase fibre opening and dust release
DE3333750A1 (en) * 1983-09-19 1985-04-18 Trützschler GmbH & Co KG, 4050 Mönchengladbach DEVICE AND METHOD FOR OPENING AND CLEANING FIBER GOODS

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319830A (en) * 1990-03-23 1994-06-14 Maschinenfabrik Rieter Ag Cleaning machine for textile fibers
EP0464441A1 (en) * 1990-07-02 1992-01-08 Maschinenfabrik Rieter Ag Method and apparatus for cleaning cotton fibres
DE19630018A1 (en) * 1996-07-25 1998-01-29 Rieter Ag Maschf Assembly especially for use in processing cotton fibre materials
WO2006047897A1 (en) * 2004-11-04 2006-05-11 Maschinenfabrik Rieter Ag Cleansing device for fibre flocks
CN101052759B (en) * 2004-11-04 2016-03-30 里特机械公司 Device for cleaning fiber wadding
EP2336405A1 (en) 2009-12-17 2011-06-22 Maschinenfabrik Rieter AG Cleaning device for fiber flock
CN103993392A (en) * 2014-05-26 2014-08-20 江苏双盈纺织科技有限公司 Efficient opener
CN103993392B (en) * 2014-05-26 2016-02-10 江苏双盈纺织科技有限公司 A kind of high-efficiency opener
CN105780200A (en) * 2016-04-13 2016-07-20 吴江澳明纺织品有限公司 Novel cotton slitter
CN106012112A (en) * 2016-08-09 2016-10-12 姚雅珍 Full-automatic opener for garments
EP3431641A1 (en) 2017-07-17 2019-01-23 Maschinenfabrik Rieter AG Cleaning device

Also Published As

Publication number Publication date
JPH02229220A (en) 1990-09-12
EP0379726B1 (en) 1992-07-22
US4964196A (en) 1990-10-23
DE58901892D1 (en) 1992-08-27

Similar Documents

Publication Publication Date Title
EP0379726B1 (en) Cleaning machine for textile fibres
DE10139163B4 (en) Device on a card in which the clothing of the drum opposite cover elements are present
DE1274476B (en) Device for removing dust from cards or cards and removing waste
DE3429024C2 (en) Method and device for separating dust from fiber material
EP0447966B1 (en) Cleaning machine for textile fibres
DE4213342A1 (en) Device for mechanical cleaning of surfaces
CH621153A5 (en)
EP0754485A1 (en) Process and device for cleaning dusty air
DE3637351C2 (en)
DE69309035T2 (en) Dust collector with means for spraying water
DE3731591A1 (en) DEVICE FOR SEPARATING IMPURITIES FROM A FLOW OF FIBER GOODS, IN PARTICULAR TEXTILE FIBER FIBERS
EP2336405B1 (en) Cleaning device for fiber flock
CH682085A5 (en)
DE2213006A1 (en) Spindleless spinning machine
DE2264299B2 (en) Device for separating dissolved fiber flakes from a conveying air stream
DE4408247A1 (en) Floor cleaning machine for sports halls
DE3715217A1 (en) DEVICE FOR EXTRACTION AND FILTERING DUST- AND / OR FIBER-AIR-BASED AIR ON SPINNING MACHINES
EP0748645B1 (en) Method using a rotating filter
DE29814547U1 (en) Cleaning device for a pleated filter in a suction device
CH629855A5 (en) Apparatus for opening and cleaning fibre material
DE3716585C2 (en) Device for separating various substances from a mixture, in particular for separating waste
AT206795B (en) Device on a card for pneumatic waste removal
DE2515780A1 (en) Opener and cleaner for fibres to be spun - esp cotton, etc. for rotor spinning, removing all dust
CH637037A5 (en) Device for separating heavy material and light material of a solids mixture
DE2614992C3 (en) Device for separating the fiber fly entrained in a suction flow

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19900818

17Q First examination report despatched

Effective date: 19911216

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920722

REF Corresponds to:

Ref document number: 58901892

Country of ref document: DE

Date of ref document: 19920827

ITF It: translation for a ep patent filed

Owner name: GUZZI E RAVIZZA S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19961121

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20011123

Year of fee payment: 13

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021227

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20021227

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20051212

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070703

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071222

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081227