EP0450361A1 - Drafting arrangement with at least one drafting apron - Google Patents

Drafting arrangement with at least one drafting apron Download PDF

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Publication number
EP0450361A1
EP0450361A1 EP91103938A EP91103938A EP0450361A1 EP 0450361 A1 EP0450361 A1 EP 0450361A1 EP 91103938 A EP91103938 A EP 91103938A EP 91103938 A EP91103938 A EP 91103938A EP 0450361 A1 EP0450361 A1 EP 0450361A1
Authority
EP
European Patent Office
Prior art keywords
apron
pair
guide element
drafting system
cage
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
EP91103938A
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German (de)
French (fr)
Other versions
EP0450361B1 (en
Inventor
Jürg Solenthaler
Herbert Dr. Stalder
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
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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.)
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0450361A1 publication Critical patent/EP0450361A1/en
Application granted granted Critical
Publication of EP0450361B1 publication Critical patent/EP0450361B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the invention relates to a drafting system of a spinning machine, at least consisting of an apron draft zone according to the preamble of claim 1.
  • Such a drafting system is known, for example, from DE-B-11 15 160.
  • a tensioning device is described for top aprons of an apron drafting system which are guided in an apron cage with a rigid turning rail.
  • the bent reversing rail tensions the top strap by means of a resilient, supported tendon and is pressed against a fixed stop with an adjusting screw.
  • Such a conventional apron drafting system has the disadvantage that there is only a clamping surface between the two aprons. It is very difficult to apply a uniformly high pressure on the sliver to be drawn. In particular, the pressure on the pair of rollers of the apron drafting system is significantly greater than the pressure on the apron cage. This results in an uneven guidance of the fibers in the draft zone, which is particularly undesirable for spinning from an untwisted, parallelized fiber sliver.
  • the object of the invention is to improve a drafting arrangement of the type mentioned above in such a way that the fiber guidance between the two aprons becomes much more precise and the drafting arrangement is particularly suitable for the so-called band spinning.
  • FIG. 1 shows an apron warping zone 1 with input rollers 2 and 3 and output rollers 4 and 5.
  • a lower apron 6 is driven over the lower roller 2 and guided by a guide element 7 facing the pair of output rollers 4, 5 and a deflection roller 8.
  • An upper apron 9 is guided over the upper roller 3 and around an apron cage 10 (only indicated).
  • the cage 10 is pressed against the guide element 7 by means of a spring 11, the spring being supported against the machine frame 12.
  • the guide element 7 has a step 13 in the contact zone of the two straps 6 and 9 and an edge 14 facing the output roller pair 4, 5.
  • the end of the top apron cage 10 is now arranged above the edge 14 of the guide element 7, so that a second clamping surface is formed next to the clamping line between the rollers 2 and 3.
  • the distance between this clamping line and the clamping surface should be chosen so that it is less than or at most equal to the average staple fiber length to be processed.
  • the end 15 of the cage 10 and the edge 14 are both rounded so that excessive friction with the straps 6 and 9 is prevented.
  • the top strap 9 ' is shorter than the top strap 9 in FIG. 1.
  • the step 13 brings about a certain relaxation of the lower apron 6 in the region of the guide element 7.
  • this second clamping surface is fixed in the area of step 13.
  • Both variants ensure precise fiber guidance, the variant according to FIG. 1 ensuring that the fiber sliver is directed more towards the lower roller 5 and in the variant according to FIG. 2 towards the upper roller 4 and is given additional guidance through a kind of wrap around these rollers .
  • the end 15 of the upper apron cage 10 is arranged as close as possible to the lower roller 5 (FIG. 1) or the edge 14 as close as possible to the upper roller 4 (FIG. 2) of the pair of output rollers.
  • Both versions have proven their worth, especially for a ring spinning machine in which spinning is carried out directly from the untwisted sliver.
  • the above-mentioned drafting system is also extremely suitable for the known nozzle spinning.

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

Abstract

A novel drafting apron (1) having a stepped guide element (7) is presented. The upper apron cage (10) defines with this guide element (7) a second clamping surface. <IMAGE>

Description

Die Erfindung betrifft ein Streckwerk einer Spinnmaschine, zumindest bestehend aus einer Riemchenverzugszone nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a drafting system of a spinning machine, at least consisting of an apron draft zone according to the preamble of claim 1.

Ein solches Streckwerk ist beispielsweise bekannt aus DE-B-11 15 160. Dort ist eine Spannvorrichtung beschrieben für in einem Riemchenkäfig mit starrer Wendeschiene geführten Oberriemchen eines Riemchenstreckwerks. Die abgebogene Wendeschiene spannt das Oberriemchen mittels eines federnden abgestützten Spanngliedes und wird dabei mit einer Stellschraube gegen einen festen Anschlag gedrückt.Such a drafting system is known, for example, from DE-B-11 15 160. There, a tensioning device is described for top aprons of an apron drafting system which are guided in an apron cage with a rigid turning rail. The bent reversing rail tensions the top strap by means of a resilient, supported tendon and is pressed against a fixed stop with an adjusting screw.

Ein solches herkömmliches Riemchenstreckwerk hat den Nachteil, dass bloss eine Klemmfläche zwischen den beiden Riemchen vorhanden ist. Dabei ist es sehr schwierig, einen gleichmässig grossen Druck auf dem zu verstreckenden Faserband auszuüben. Insbesondere ist der Druck auf das Walzenpaar des Riemchenstreckwerkes wesentlich grösser als der Druck auf dem Riemchenkäfig. Es entsteht dadurch eine ungleichmässige Führung der Fasern in der Verzugszone, welche vor allem für das Spinnen ab einem ungedrehten, parallelisierten Faserband unerwünscht ist.Such a conventional apron drafting system has the disadvantage that there is only a clamping surface between the two aprons. It is very difficult to apply a uniformly high pressure on the sliver to be drawn. In particular, the pressure on the pair of rollers of the apron drafting system is significantly greater than the pressure on the apron cage. This results in an uneven guidance of the fibers in the draft zone, which is particularly undesirable for spinning from an untwisted, parallelized fiber sliver.

Der Erfindung stellt sich nun die Aufgabe, ein Streckwerk der obengenannten Art derart zu verbessern, dass die Faserführung zwischen den beiden Riemchen wesentlich präziser wird und das Streckwerk für das sog. Bandspinnen besonders geeignet ist.The object of the invention is to improve a drafting arrangement of the type mentioned above in such a way that the fiber guidance between the two aprons becomes much more precise and the drafting arrangement is particularly suitable for the so-called band spinning.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.

Die Erfindung hat den grossen Vorteil, dass am Anfang und am Ende im Riemchenstreckwerk zwei Klemmflächen vorhanden sind, wobei der Abstand zwischen den beiden Klemmflächen kleiner oder höchstens gleich der Stapelfaserlänge ist. Vor allem bewirkt die zweite Klemmfläche eine enge und präzise Faserführung in das Ausgangswalzenpaar der Riemchenverzugszone. Wichtig ist, dass das erfindungsgemässe Riemchenstreckwerk keinen Anschlag zwischen Riemchenkäfig und dem Führungselement für das Unterriemchen aufweist. Weitere Vorteile der Erfindung folgen aus der nachstehenden Beschreibung. Dort wird die Erfindung anhand eines in den Zeichnungen näher erläuterten Beispieles erklärt. Es zeigt:

Fig. 1
eine erste Anordnung des Oberriemchenkäfigs in einer Riemchenverzugszone und
Fig. 2
eine zweite Anordnung des Oberriemchenkäfigs in derselben Riemchenverzugszone.
The invention has the great advantage that there are two clamping surfaces at the beginning and at the end of the apron stretcher are, the distance between the two clamping surfaces is less than or at most equal to the staple fiber length. Above all, the second clamping surface ensures tight and precise fiber guidance into the exit roller pair of the apron warping zone. It is important that the apron drafting device according to the invention has no stop between the apron cage and the guide element for the lower apron. Further advantages of the invention follow from the description below. There, the invention is explained using an example explained in more detail in the drawings. It shows:
Fig. 1
a first arrangement of the upper apron cage in an apron warpage and
Fig. 2
a second arrangement of the upper apron cage in the same apron warping zone.

In beiden Figuren werden für dieselben Elemente dieselben Bezugszeichen verwendet. Fig. 1 zeigt eine Riemchenverzugszone 1 mit Eingangswalzen 2 und 3 und Ausgangswalzen 4 und 5. Ein Unterriemchen 6 wird über die Unterwalze 2 angetrieben und durch ein dem Ausgangswalzenpaar 4,5 zugewandten Führungselement 7 und eine Umlenkrolle 8 geführt. Ein Oberriemchen 9 wird über der Oberwalze 3 und um ein Riemchenkäfig 10 (nur andeutungsweise dargestellt) herumgeführt. Der Käfig 10 wird mittels einer Feder 11 gegen das Führungselement 7 gedrückt, wobei die Feder gegen das Maschinengestell 12 abgestützt ist. Das Führungselement 7 weist in der Berührungszone der beiden Riemchen 6 und 9 eine Stufe 13 auf und eine dem Ausgangswalzenpaar 4,5 zugewandte Kante 14 auf. Das Ende des Oberriemchenkäfigs 10 ist nun vorstehend über der Kante 14 des Führungselementes 7 angeordnet, so dass eine zweite Klemmfläche neben der Klemmlinie zwischen den Walzen 2 und 3 entsteht. Der Abstand zwischen dieser Klemmlinie und der Klemmfläche soll so gewählt werden, dass er kleiner oder höchstens gleich der zu verarbeitenden mittleren Stapelfaserlänge ist. Das Ende 15 des Käfigs 10 und die Kante 14 sind beide abgerundet, damit eine zu grosse Reibung mit den Riemchen 6 und 9 verhindert wird.The same reference numerals are used in both figures for the same elements. 1 shows an apron warping zone 1 with input rollers 2 and 3 and output rollers 4 and 5. A lower apron 6 is driven over the lower roller 2 and guided by a guide element 7 facing the pair of output rollers 4, 5 and a deflection roller 8. An upper apron 9 is guided over the upper roller 3 and around an apron cage 10 (only indicated). The cage 10 is pressed against the guide element 7 by means of a spring 11, the spring being supported against the machine frame 12. The guide element 7 has a step 13 in the contact zone of the two straps 6 and 9 and an edge 14 facing the output roller pair 4, 5. The end of the top apron cage 10 is now arranged above the edge 14 of the guide element 7, so that a second clamping surface is formed next to the clamping line between the rollers 2 and 3. The distance between this clamping line and the clamping surface should be chosen so that it is less than or at most equal to the average staple fiber length to be processed. The end 15 of the cage 10 and the edge 14 are both rounded so that excessive friction with the straps 6 and 9 is prevented.

In Fig. 2 ist dieselbe Riemchenverzugszone 1 dargestellt, wobei hier der Oberriemchenkäfig 10 in die Stufe 13 des Führungselementes 7 gedrückt wird. Das Oberriemchen 9' ist dazu kürzer als das Oberriemchen 9 in Fig. 1.2 shows the same apron warping zone 1, the upper apron cage 10 being pressed into the step 13 of the guide element 7 here. To this end, the top strap 9 'is shorter than the top strap 9 in FIG. 1.

Bei der Ausführungsvariante nach Fig. 1 bewirkt die Stufe 13 eine gewisse Entspannung des Unterriemchens 6 im Bereich des Führungselementes 7. Dadurch wird die zweite Klemmfläche im Bereich der Kante 14 genau definiert. Bei der Ausführungsvariante nach Fig. 2 wird diese zweite Klemmfläche im Bereich der Stufe 13 festgelegt. Beide Varianten gewährleisten eine präzise Faserführung, wobei die Variante nach Fig. 1 dafür sorgt, dass das Faserband eher zur Unterwalze 5 und in der Variante nach Fig. 2 eher zur Oberwalze 4 gerichtet ist und durch eine Art Umschlingung um diese Walzen eine zusätzliche Führung erfährt. Das Ende 15 des Oberriemchenkäfigs 10 ist dazu so nahe wie möglich zur unteren Walze 5 (Fig. 1) oder die Kante 14 so nahe wie möglich zur oberen Walze 4 (Fig. 2) des Ausgangswalzenpaares angeordnet. Beide Ausführungsvarianten haben sich ausgezeichnet bewährt, insbesondere für eine Ringspinnmaschine, bei welcher direkt ab dem unverdrehten, Faserband gesponnen wird. Jedoch ist das obengenannte Streckwerk ebenfalls ausgezeichnet geeignet für das bekannte Düsenspinnen.In the embodiment variant according to FIG. 1, the step 13 brings about a certain relaxation of the lower apron 6 in the region of the guide element 7. This precisely defines the second clamping surface in the region of the edge 14. 2, this second clamping surface is fixed in the area of step 13. Both variants ensure precise fiber guidance, the variant according to FIG. 1 ensuring that the fiber sliver is directed more towards the lower roller 5 and in the variant according to FIG. 2 towards the upper roller 4 and is given additional guidance through a kind of wrap around these rollers . For this purpose, the end 15 of the upper apron cage 10 is arranged as close as possible to the lower roller 5 (FIG. 1) or the edge 14 as close as possible to the upper roller 4 (FIG. 2) of the pair of output rollers. Both versions have proven their worth, especially for a ring spinning machine in which spinning is carried out directly from the untwisted sliver. However, the above-mentioned drafting system is also extremely suitable for the known nozzle spinning.

Claims (7)

Streckwerk einer Spinnmaschine zumindest bestehend aus einer Riemchenverzugszone (1) mit einem Eingangswalzenpaar (2,3), einem Oberriemchen (9) und einem Unterriemchen (6), einem federbelasteten Oberriemchenkäfig (10), einem Führungselement (7) für das Unterriemchen (6) und einem Ausgangswalzenpaar (4,5), dadurch gekennzeichnet, dass das Führungselement (7) zumindest auf der dem Unterriemchen zugewandten Seite eine stufenförmige Vertiefung (13) aufweist und dass das Oberriemchen (9) mittels des federbelasteten Riemchenkäfigs (10) vorstehend über eine Kante (13;14) des Führungselementes (7) direkt auf das Unterriemchen (6) drückend angeordnet ist, so dass neben der Klemmlinie des Eingangswalzenpaares (2,3) eine Klemmfläche unmittelbar nach der dem Ausgangswalzenpaar (4,5) zugewandten Kante (13;14) des Führungselementes (7) zwischen den beiden Riemchen (6,9) besteht (Fig. 1,2).Drafting system of a spinning machine at least consisting of an apron warping zone (1) with an input roller pair (2, 3), an upper apron (9) and a lower apron (6), a spring-loaded upper apron cage (10), a guide element (7) for the lower apron (6) and a pair of output rollers (4, 5), characterized in that the guide element (7) has a step-shaped depression (13) at least on the side facing the lower apron and that the upper apron (9) projects above an edge by means of the spring-loaded apron cage (10) (13; 14) of the guide element (7) is arranged pressing directly onto the lower apron (6), so that in addition to the clamping line of the input roller pair (2, 3), a clamping surface immediately after the edge (13; 14) of the guide element (7) between the two straps (6,9) (Fig. 1,2). Streckwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Oberriemchen (9) in bezug auf das Ausgangswalzenpaar (4,5) vorstehend zum Unterriemchen (6) angeordnet ist, und dass das Ende (15) des Oberriemchenkäfigs (10) das Oberriemchen (9) über die äussere, dem Ausgangswalzenpaar (4,5) zugewandte Kante (14) des Führungselementes (7) drückt (Fig. 1).Drafting system according to claim 1, characterized in that the upper apron (9) is arranged above the lower apron (6) with respect to the pair of output rollers (4, 5), and in that the end (15) of the upper apron cage (10) the upper apron (9) presses over the outer edge (14) of the guide element (7) facing the pair of output rollers (4, 5) (FIG. 1). Streckwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Oberriemchen (9) in bezug auf das Ausgangswalzenpaar (4,5) zurückversetzt zum Unterriemchen (6) angeordnet ist, und dass das Ende (15) des Oberriemchenkäfigs (10) in die stufenförmige Vertiefung (13) hineindrückt (Fig. 2)Drafting system according to claim 1, characterized in that the top apron (9) is arranged set back with respect to the pair of output rollers (4, 5) to the bottom apron (6), and in that the end (15) of the top apron cage (10) into the step-shaped recess ( 13) pushes in (Fig. 2) Streckwerk nach Anspruch 2, dadurch gekennzeichnet, dass das Ende (15) des Oberriemchenkäfigs (10) möglichst nahe zur unteren Walze (5) des Ausgangswalzenpaares angeordnet ist (Fig. 1).Drafting system according to claim 2, characterized in that the end (15) of the upper apron cage (10) is arranged as close as possible to the lower roller (5) of the pair of output rollers (Fig. 1). Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass die Kante (14) des Führungselementes (7) möglichst nahe zur oberen Walze (4) des Ausgangswalzenpaares angeordnet ist (Fig. 2).Drafting system according to claim 3, characterized in that the edge (14) of the guide element (7) is arranged as close as possible to the upper roller (4) of the pair of output rollers (Fig. 2). Streckwerk nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die dem Ausgangswalzenpaar (4,5) zugewandten Kanten (13;14) abgerundet sind und die Stufe (13) des stufenförmigen Führungselementes (7) annähernd in dessen Mitte vorgesehen ist (Fig. 1,2).Drafting system according to one of claims 2 to 5, characterized in that the edges (13; 14) facing the pair of output rollers (4, 5) are rounded and the step (13) of the step-shaped guide element (7) is provided approximately in the center thereof (Fig . 1,2). Streckwerk nach einem der vorangehenden Ansprüchen, dadurch gekennzeichnet, dass der Abstand zwischen der Klemmlinie des Eingangswalzenpaares (2,3) und der Klemmfläche zwischen dem Riemchenkäfig (10) und der Kante (13,14) des Führungselementes (7) kleiner oder höchstens gleich der mittleren Stapelfaserlänge ist (Fig. 1,2).Drafting system according to one of the preceding claims, characterized in that the distance between the clamping line of the input roller pair (2, 3) and the clamping surface between the apron cage (10) and the edge (13, 14) of the guide element (7) is less than or at most equal to that average staple fiber length (Fig. 1,2).
EP19910103938 1990-04-06 1991-03-14 Drafting arrangement with at least one drafting apron Expired - Lifetime EP0450361B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1175/90 1990-04-06
CH117590A CH680374A5 (en) 1990-04-06 1990-04-06

Publications (2)

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EP0450361A1 true EP0450361A1 (en) 1991-10-09
EP0450361B1 EP0450361B1 (en) 1996-05-22

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EP19910103938 Expired - Lifetime EP0450361B1 (en) 1990-04-06 1991-03-14 Drafting arrangement with at least one drafting apron

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JP (1) JPH0649720A (en)
CH (1) CH680374A5 (en)
DE (1) DE59107829D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344319C2 (en) * 1993-01-28 2003-12-24 Rieter Ag Maschf Doppelriemchenstreckwerk
EP2130956A1 (en) * 2008-06-03 2009-12-09 Kabushiki Kaisha Toyota Jidoshokki Apron cradle for spinning frames
CH708812A1 (en) * 2013-11-05 2015-05-15 Rieter Ag Maschf Drafting system with a pressure element.
CN105155048A (en) * 2015-09-30 2015-12-16 浙江中新毛纺织有限公司 Spinning frame structure
CN105177772A (en) * 2015-09-30 2015-12-23 浙江中新毛纺织有限公司 Improved spinning frame

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20221912U1 (en) * 2002-11-11 2009-06-10 Spindelfabrik Suessen Gmbh Spinning machine with compacting device
CN100371511C (en) * 2005-04-08 2008-02-27 成立强 Pressure bar top pin
CN114293291B (en) * 2021-12-31 2022-12-09 安徽兰翔智能制造有限公司 Weaving rubber ring subassembly convenient to change

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1115160B (en) * 1957-11-15 1961-10-12 Skf Kugellagerfabriken Gmbh Tensioning device for upper aprons on spinning machine draw frames
DE1144160B (en) * 1960-07-15 1963-02-21 Ernst Toenniessen Double apron drafting system for spinning machines
DE1176532B (en) * 1961-08-30 1964-08-20 Skf Kugellagerfabriken Gmbh Double apron drafting system for spinning machines
DE2750416A1 (en) * 1977-11-11 1979-05-17 Skf Kugellagerfabriken Gmbh DRAWER FOR SPINNING MACHINERY AND METHOD FOR ASSEMBLING ITS SUSPENDING STRAP TENSIONERS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1115160B (en) * 1957-11-15 1961-10-12 Skf Kugellagerfabriken Gmbh Tensioning device for upper aprons on spinning machine draw frames
DE1144160B (en) * 1960-07-15 1963-02-21 Ernst Toenniessen Double apron drafting system for spinning machines
DE1176532B (en) * 1961-08-30 1964-08-20 Skf Kugellagerfabriken Gmbh Double apron drafting system for spinning machines
DE2750416A1 (en) * 1977-11-11 1979-05-17 Skf Kugellagerfabriken Gmbh DRAWER FOR SPINNING MACHINERY AND METHOD FOR ASSEMBLING ITS SUSPENDING STRAP TENSIONERS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344319C2 (en) * 1993-01-28 2003-12-24 Rieter Ag Maschf Doppelriemchenstreckwerk
EP2130956A1 (en) * 2008-06-03 2009-12-09 Kabushiki Kaisha Toyota Jidoshokki Apron cradle for spinning frames
CH708812A1 (en) * 2013-11-05 2015-05-15 Rieter Ag Maschf Drafting system with a pressure element.
CN105155048A (en) * 2015-09-30 2015-12-16 浙江中新毛纺织有限公司 Spinning frame structure
CN105177772A (en) * 2015-09-30 2015-12-23 浙江中新毛纺织有限公司 Improved spinning frame

Also Published As

Publication number Publication date
JPH0649720A (en) 1994-02-22
CH680374A5 (en) 1992-08-14
DE59107829D1 (en) 1996-06-27
EP0450361B1 (en) 1996-05-22

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