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EP0704301A1 - Pressure roll for channel-free pressure - Google Patents

Pressure roll for channel-free pressure Download PDF

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Publication number
EP0704301A1
EP0704301A1 EP95106689A EP95106689A EP0704301A1 EP 0704301 A1 EP0704301 A1 EP 0704301A1 EP 95106689 A EP95106689 A EP 95106689A EP 95106689 A EP95106689 A EP 95106689A EP 0704301 A1 EP0704301 A1 EP 0704301A1
Authority
EP
European Patent Office
Prior art keywords
printing
roller
intermediate layer
printing roller
core
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
EP95106689A
Other languages
German (de)
French (fr)
Other versions
EP0704301B1 (en
Inventor
Eduard Dr. Hoffmann
Wolfgang Prem
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0704301A1 publication Critical patent/EP0704301A1/en
Application granted granted Critical
Publication of EP0704301B1 publication Critical patent/EP0704301B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • such a printing roller is made of a metallic material and preferably has a chrome coating as a protection against corrosion from common printing media.
  • Such a pressure roller has become known from German patent application P 43 42 159.8.
  • a sleeve-shaped printing form is described there.
  • the sleeve whose inner diameter is smaller than the cylinder diameter of the supporting part, is mechanically expanded to the larger cylinder diameter after precentering by means of a conical chamfer piece of the pressure roller body, so that the sleeve can be pushed completely onto the roller body via an air cushion.
  • the object of the present invention is therefore to further develop a generic printing roller such that when a sleeve-shaped printing or transfer form is pushed onto the printing roller, it can be adjusted and mounted precisely and stationary on the printing roller without the principle underlying the sleeve technology being restricted becomes.
  • the single figure shows a highly schematic partial longitudinal section of a printing roller, on the roller core 1 of which a printing or transfer mold 2 is partially pushed.
  • the roller core 1 is usually designed as a hollow body which has a greater wall thickness than the sleeve-shaped printing or transfer form 2. For the most part, the roller core 1 is designed with a larger cylinder diameter than the inside diameter of the printing or transfer mold 2.
  • a cylinder piece in the form of a pre-centering cone 3 with a smaller diameter than the inside diameter of the printing cylinder 2 is provided on one end of the printing roller, by means of which the printing cylinder 2 can be roughly positioned on the printing roller.
  • the pressure cylinder 2 By pushing it further onto a conical push-on cone 4 of the pressure roller, the pressure cylinder 2 is expanded to a diameter corresponding to the diameter of the surface area 5 of the roller core 1, in which the air outlet bores 6 open.
  • the Printing cylinder 2 is elastically stretched by the emerging air and can slide on its compressed air cushion into its end position on the printing roller.
  • a thin intermediate layer 7 is provided between the surface of the roller core 1 and the inner surface of the sleeve-shaped printing cylinder 2, for the adjustment and better anchoring of the printing cylinder 2 on the printing roller.
  • the surface of the roller core 1 has an area 9 in the form of a reduction in diameter corresponding to the thickness of the thin intermediate layer 7, so that the surface areas 5 of the roller core 1, into which the air outlet bores 6 open, are higher than the area 9.
  • the stepped area 9 of the roll core 1 is covered all around with the thin intermediate layer 7, such that the surface area 5 with the air outlet bores 6 and the stepped surface area 9 of the roll core 1 with the intermediate layer covering run flat. Both end faces of such a pressure roller can be made the same.
  • the thin intermediate layer 7 is a self-adhesive plastic film that is easily exchangeable.
  • a recess 8 for guiding a cutting tool is provided between a stepped area 9 and an elevated area 5 around the roll core 1.
  • the thin intermediate layer 7 can also be formed as a coating of the complete surface, preferably of the stepped surface area 9 of the roller core 1.
  • the coating can consist of plastic, lacquer, metallic base material or ceramic materials.
  • a GfK coating is provided as the intermediate layer 7, which has a thermally insulating effect.
  • a further advantage of such a coating would be the thermal insulation of the roller core 1, which would make cooling the sleeve-shaped printing form 2 easier.
  • a thermally insulating intermediate layer 7 prevents an undesired outflow of heat from the sleeve-shaped printing form in the roller core 1. This in turn has advantages when filling gravure printing form sleeves with a thermoplastic substance, as well as in general with heat-assisted thermal transfer processes.
  • the thin intermediate layer can of course also be designed as an interchangeable sleeve.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

There is a thin intermediate layer (7) over at least part of the area between the surface of the roll core (1) and the internal surface of the shell-shaped printing or copying form (2) for the adjustment and improved anchoring of the printing form on the printing roll (1,3,4,6). The intermediate layer may consist of a self-sticking plastics foil laid on the surface of the roll core, or a coating of plastics or lacquer, or of a basically metal material, or of ceramic. It may be in the form of a changeable shell.

Description

In der heutigen Hülsentechnik, d. h. in der Technologie für den kanallosen Druck - und zwar mit Gummituch und Druckform - ist es üblich zum Aufbringen der hülsenförmigen Druck- oder Übertragungsform auf eine Druckwalze, die Druck- oder Übertragungsform unter Aufweiten mittels Druckluft auf die Druckwalze aufzuschieben. Die Wegnahme der Druckluft bewirkt ein formschlüssiges Anlegen der Druck- oder Übertragungsform nach dem Prinzip einer Schrumpfpassung auf der Druckwalze. Durch erneute Zufuhr von Druckluft kann die Druck- oder Übertragungsform wieder von der Druckwalze genommen werden.In today's sleeve technology, d. H. In the technology for channelless printing - with a blanket and printing form - it is customary to apply the sleeve-shaped printing or transfer form to a printing roller, to push the printing or transfer form onto the printing roller while expanding with compressed air. The removal of the compressed air results in a form-fitting application of the printing or transfer form on the principle of a shrink fit on the printing roller. By re-supplying compressed air, the printing or transfer form can be removed from the printing roller again.

In der Regel ist eine solche Druckwalze aus einem metallischen Werkstoff gefertigt und weist vorzugsweise als Korrosionsschutz vor gängigen Druckmedien eine Chrombeschichtung auf.As a rule, such a printing roller is made of a metallic material and preferably has a chrome coating as a protection against corrosion from common printing media.

Aus der deutschen Patentanmeldung P 43 42 159.8 ist eine derartige Druckwalze bekannt geworden. Dort ist eine hülsenförmige Druckform beschrieben. Die Hülse, deren Innendurchmesser kleiner als der Zylinderdurchmesser des tragenden Teils ist, wird nach dem Vorzentrieren mittels eines kegelförmigen Fasenstücks des Druckwalzenkörpers mechanisch auf den größeren Zylinderdurchmesser aufgeweitet, so daß die Hülse über ein Luftkissen vollständig auf den Walzenkörper aufgeschoben werden kann.Such a pressure roller has become known from German patent application P 43 42 159.8. A sleeve-shaped printing form is described there. The sleeve, whose inner diameter is smaller than the cylinder diameter of the supporting part, is mechanically expanded to the larger cylinder diameter after precentering by means of a conical chamfer piece of the pressure roller body, so that the sleeve can be pushed completely onto the roller body via an air cushion.

Desweiteren ist es heutzutage in der Druckindustrie bekannt, zur Justage von herkömmlichen Gummitüchern und plattenförmigen Druckformen, aber auch zur Verlängerung und zur Verminderung des Druckbildes Kunststoff-Folien als Unterlage zu verwenden. Die Übertragung solcher Kunststoff-Folien auf die Hülsentechnik ist jedoch bis jetzt nicht möglich.Furthermore, it is known today in the printing industry to use plastic foils as a base for adjusting conventional rubber blankets and plate-like printing plates, but also for lengthening and reducing the printed image. However, the transfer of such plastic films to the sleeve technology has not yet been possible.

Aufgabe der vorliegenden Erfindung ist es deshalb, eine gattungsbildende Druckwalze derart weiterzubilden, daß beim Aufschieben einer hülsenförmigen Druck- oder Übertragungsform auf die Druckwalze diese genau und ortsfest auf der Druckwalze justiert, bzw. montiert werden kann, ohne daß das der Hülsentechnik zugrunde liegende Prinzip eingeschränkt wird.The object of the present invention is therefore to further develop a generic printing roller such that when a sleeve-shaped printing or transfer form is pushed onto the printing roller, it can be adjusted and mounted precisely and stationary on the printing roller without the principle underlying the sleeve technology being restricted becomes.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Bevorzugte Ausgestaltungen der übergeordneten Maßnahmen sind den Unteransprüchen zu entnehmen.This object is achieved by the features of claim 1. Preferred configurations of the superordinate measures can be found in the subclaims.

Ein bevorzugtes Ausführungsbeispiel der Erfindung wird im folgenden unter Bezugnahme der Zeichnung beschrieben.A preferred embodiment of the invention is described below with reference to the drawing.

Die einzige Figur zeigt stark schematisiert einen teilweisen Längsschnitt einer Druckwalze, auf deren Walzenkern 1 teilweise eine Druck- oder Übertragungsform 2 aufgeschoben ist.The single figure shows a highly schematic partial longitudinal section of a printing roller, on the roller core 1 of which a printing or transfer mold 2 is partially pushed.

Der Walzenkern 1 ist üblicherweise als Hohlkörper ausgebildet, der im Vergleich zur hülsenförmigen Druck- oder Übertragungsform 2 eine größere Wandstärke aufweist. Größtenteils ist der Walzenkern 1 mit einem größeren Zylinderdurchmesser ausgeführt als der Innendurchmesser der Druck- oder Übertragungsform 2 beträgt.The roller core 1 is usually designed as a hollow body which has a greater wall thickness than the sleeve-shaped printing or transfer form 2. For the most part, the roller core 1 is designed with a larger cylinder diameter than the inside diameter of the printing or transfer mold 2.

Um das Aufziehen der Druck- oder Übertragungsform 2 zu erleichtern, ist an einer Stirnseite der Druckwalze ein Zylinderstück in Form eines Vorzentrierkonuses 3 mit kleinerem Durchmesser als der Innendurchmesser des Druckzylinders 2 vorgesehen, mittels diesem der Druckzylinder 2 grob auf der Druckwalze positioniert werden kann.In order to facilitate the mounting of the printing or transfer form 2, a cylinder piece in the form of a pre-centering cone 3 with a smaller diameter than the inside diameter of the printing cylinder 2 is provided on one end of the printing roller, by means of which the printing cylinder 2 can be roughly positioned on the printing roller.

Durch ein weiteres Aufschieben auf einen kegelförmigen Aufschiebekonus 4 der Druckwalze wird der Druckzylinder 2 auf einen Durchmesser entsprechend dem Durchmesser des Oberflächenbereichs 5 des Walzenkerns 1, in dem die Luftauslaßbohrungen 6 münden, aufgeweitet. Beim Passieren der Luftauslaßbohrungen 6 wird der Druckzylinder 2 durch die austretende Luft elastisch gedehnt und kann auf einem Druckluftpolster in seine Endposition auf der Druckwalze gleiten.By pushing it further onto a conical push-on cone 4 of the pressure roller, the pressure cylinder 2 is expanded to a diameter corresponding to the diameter of the surface area 5 of the roller core 1, in which the air outlet bores 6 open. When passing the air outlet holes 6, the Printing cylinder 2 is elastically stretched by the emerging air and can slide on its compressed air cushion into its end position on the printing roller.

Zwischen der Oberfläche des Walzenkerns 1 und der Innenoberfläche des hülsenförmigen Druckzylinders 2 ist eine dünne Zwischenschicht 7 zur Justage und besseren Verankerung des Druckzylinder 2 auf der Druckwalze vorgesehen.Between the surface of the roller core 1 and the inner surface of the sleeve-shaped printing cylinder 2, a thin intermediate layer 7 is provided for the adjustment and better anchoring of the printing cylinder 2 on the printing roller.

Dafür weist die Oberfläche des Walzenkerns 1 einen entsprechend der Dicke der dünnen Zwischenschicht 7 abgesetzten Bereich 9 in Form einer Durchmesserveringerung auf, so daß die Oberflächenbereiche 5 des Walzenkerns 1, in die die Luftauslaßbohrungen 6 münden, gegenüber dem abgesetzten Bereich 9 erhöht liegen.For this purpose, the surface of the roller core 1 has an area 9 in the form of a reduction in diameter corresponding to the thickness of the thin intermediate layer 7, so that the surface areas 5 of the roller core 1, into which the air outlet bores 6 open, are higher than the area 9.

Der abgesetzte Bereich 9 des Walzenkerns 1 ist rundum mit der dünnen Zwischenschicht 7 belegt, derart, das der Oberflächenbereich 5 mit den Luftauslaßbohrungen 6 und der abgesetzte Oberflächenbereich 9 des Walzenkerns 1 mit der Zwischenschichtbelegung plan verlaufen. Beide Stirnseiten einer derartigen Druckwalze können gleich ausgeführt sein.The stepped area 9 of the roll core 1 is covered all around with the thin intermediate layer 7, such that the surface area 5 with the air outlet bores 6 and the stepped surface area 9 of the roll core 1 with the intermediate layer covering run flat. Both end faces of such a pressure roller can be made the same.

Im vorliegenden Beispiel ist die dünne Zwischenschicht 7 eine selbstklebende Kunststoff-Folie, die leicht austauschbar ist. Zum genauen Zuschnitt der Folie auf dem Walzenkern 1 ist zwischen einem abgesetzten Bereich 9 und einem erhöht liegenden Bereich 5 jeweils rundum des Walzenkerns 1 verlaufend ein Einstich 8 zur Führung eines Schneidwerkzeuges vorgesehen.In the present example, the thin intermediate layer 7 is a self-adhesive plastic film that is easily exchangeable. For the precise cutting of the film on the roll core 1, a recess 8 for guiding a cutting tool is provided between a stepped area 9 and an elevated area 5 around the roll core 1.

Alternativ zur Folie kann die dünne Zwischenschicht 7 auch als Beschichtung der kompletten Oberfläche, vorzugsweise des abgesetzten Oberflächenbereichs 9 des Walzenkerns 1 ausgebildet sein. Die Beschichtung kann aus Kunststoff, Lack, metallischem Basiswerkstoff oder aus keramischen Werkstoffen bestehen.As an alternative to the film, the thin intermediate layer 7 can also be formed as a coating of the complete surface, preferably of the stepped surface area 9 of the roller core 1. The coating can consist of plastic, lacquer, metallic base material or ceramic materials.

Im Besonderen ist als Zwischenschicht 7 eine GfK-Beschichtung vorgesehen, die thermisch isolierend wirkt. Ein weiterer Vorteil einer solchen Beschichtung wäre die thermische Isolation des Walzenkerns 1, wodurch eine Kühlung der hülsenförmigen Druckform 2 erleichtert wäre.In particular, a GfK coating is provided as the intermediate layer 7, which has a thermally insulating effect. A further advantage of such a coating would be the thermal insulation of the roller core 1, which would make cooling the sleeve-shaped printing form 2 easier.

Andererseits verhindert eine thermisch isolierende Zwischenschicht 7 einen unerwünschten Abfluß von Wärme von der hülsenförmigen Druckform in den Walzenkern 1. Dies wiederum hat Vorteile beim Befüllen von Tiefdruckformhülsen mit einer thermoplastischen Substanz, sowie allgemein bei durch Wärme unterstützten Thermotransferverfahren.On the other hand, a thermally insulating intermediate layer 7 prevents an undesired outflow of heat from the sleeve-shaped printing form in the roller core 1. This in turn has advantages when filling gravure printing form sleeves with a thermoplastic substance, as well as in general with heat-assisted thermal transfer processes.

Es ist auch denkbar, eine Kunststoff-Folie auf die komplette Oberfläche des Walzenkerns 1, der dann keinen abgesetzten Oberflächenbereich aufweist, zu kleben. Hierbei müssen dann die Luftauslaßbohrungen in der Folie ausgespart werden.It is also conceivable to glue a plastic film to the complete surface of the roll core 1, which then has no stepped surface area. The air outlet holes in the film must then be left blank.

Analog dazu kann natürlich die dünne Zwischenschicht auch selbst als austauschbare Hülse ausgebildet sein.Analogously, the thin intermediate layer can of course also be designed as an interchangeable sleeve.

Auf einer derart ausgebildeten Druckwalze ist es somit möglich, hülsenförmige Druckzylinder in Form von Gummitüchern oder Druckformen wie bei dem herkömmlichen Offset-Druck, bei dem die Gummitücher und Druckformen nicht hülsenförmig vorliegen, einerseits zu justieren und andererseits eine optimale Haftung auf dem Walzenkern zu bieten.On a printing roller designed in this way, it is thus possible on the one hand to adjust sleeve-shaped printing cylinders in the form of blankets or printing forms, as in conventional offset printing, in which the blankets and printing forms are not in the form of a sleeve, and on the other hand to offer optimum adhesion to the roller core.

Claims (11)

Druckwalze für den kanallosen Druck, insbesondere für eine Offset-Rotationsdruckmaschine, mit einem Walzenkern (1), auf den eine hülsenförmige Druck- oder Übertragungsform (2) aufbringbar ist, dadurch gekennzeichnet, daß zumindest teilweise zwischen der Oberfläche des Walzenkerns (1) und der Innenoberfläche der hülsenförmigen Druck- oder Übertragungsform (2) eine dünne Zwischenschicht (7) zur Justage und besseren Verankerung der Druck- oder Übertragungsform (2) auf der Druckwalze (1, 3, 4, 6) vorgesehen ist.Printing roller for channelless printing, in particular for an offset rotary printing machine, with a roller core (1) to which a sleeve-shaped printing or transfer form (2) can be applied, characterized in that at least partially between the surface of the roller core (1) and the A thin intermediate layer (7) for adjustment and better anchoring of the printing or transfer form (2) on the printing roller (1, 3, 4, 6) is provided on the inside surface of the sleeve-shaped printing or transfer form (2). Druckwalze nach Anspruch 1, dadurch gekennzeichnet, daß die dünne Zwischenschicht (7) eine selbstklebende Kunststoff-Folie ist, die auf die Oberfläche des Walzenkerns (1) gelegt ist.Printing roller according to Claim 1, characterized in that the thin intermediate layer (7) is a self-adhesive plastic film which is placed on the surface of the roller core (1). Druckwalze nach Anspruch 1, dadurch gekennzeichnet, daß die dünne Zwischenschicht (7) als Beschichtung der Oberfläche des Walzenkerns (1) ausgebildet ist.Printing roller according to Claim 1, characterized in that the thin intermediate layer (7) is designed as a coating on the surface of the roller core (1). Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die Beschichtung aus Kunststoff besteht.Printing roller according to claim 3, characterized in that the coating consists of plastic. Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die Beschichtung aus Lack besteht.Printing roller according to claim 3, characterized in that the coating consists of lacquer. Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die Beschichtung aus einem metallischen Basiswerkstoff besteht.Printing roller according to claim 3, characterized in that the coating consists of a metallic base material. Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die Beschichtung aus keramischen Werkstoffen besteht.Printing roller according to claim 3, characterized in that the coating consists of ceramic materials. Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die dünne Zwischenschicht (7) als austauschbare Hülse ausgebildet ist.Printing roller according to claim 3, characterized in that the thin intermediate layer (7) is designed as an exchangeable sleeve. Druckwalze nach Anspruch 3, dadurch gekennzeichnet, daß die Zwischenschicht (7) als eine GfK-Beschichtung ausgeführt ist, die thermisch isolierend wirkt.Printing roller according to Claim 3, characterized in that the intermediate layer (7) is designed as a GRP coating which has a thermally insulating effect. Druckwalze nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche des Walzenkerns (1) einen entsprechend der Dicke der dünnen Zwischenschicht (7) abgesetzten Bereich (9) in Form einer Durchmesserveringerung aufweist, so daß die Oberflächenbereiche (5) des Walzenkerns (1), in die Luftauslaßbohrungen (6) münden, gegenüber dem abgesetzten Bereich (9) erhöht liegen.Printing roller according to claim 1, characterized in that the surface of the roller core (1) has an area (9) in the form of a reduction in diameter corresponding to the thickness of the thin intermediate layer (7), so that the surface areas (5) of the roller core (1), open into the air outlet bores (6), lie higher than the offset area (9). Druckwalze für den kanallosen Druck nach Anspruch 9, dadurch gekennzeichnet, daß zwischen einem abgesetzten Bereich (9) und einem erhöht liegendem Bereich (5) jeweils rundum des Walzenkerns (1) verlaufend ein Einstich (8) zur Führung eines Schneidwerkzeuges vorgesehen ist.Printing roller for channelless printing according to Claim 9, characterized in that a recess (8) for guiding a cutting tool is provided between a stepped area (9) and an elevated area (5) in each case running all around the roller core (1).
EP95106689A 1994-09-15 1995-05-04 Pressure roll for channel-free pressure Expired - Lifetime EP0704301B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432816 1994-09-15
DE4432816A DE4432816A1 (en) 1994-09-15 1994-09-15 Printing roller for channelless printing

Publications (2)

Publication Number Publication Date
EP0704301A1 true EP0704301A1 (en) 1996-04-03
EP0704301B1 EP0704301B1 (en) 1998-12-02

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EP95106689A Expired - Lifetime EP0704301B1 (en) 1994-09-15 1995-05-04 Pressure roll for channel-free pressure

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US (1) US6038975A (en)
EP (1) EP0704301B1 (en)
JP (1) JP2865596B2 (en)
CA (1) CA2157318C (en)
DE (2) DE4432816A1 (en)

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Publication number Priority date Publication date Assignee Title
FR2831097A1 (en) * 2001-10-20 2003-04-25 Roland Man Druckmasch Sleeve-like form for e.g. printing cylinder, has metallic support sleeve with chamfer provided on entire inner circumference of each longitudinal end
US7077062B2 (en) 2001-10-20 2006-07-18 Man Roland Druckmaschinen Ag Sleeve-like printing or transfer form and device for chamfering the longitudinal ends of a sleeve-like printing or transfer form
DE10258048A1 (en) * 2002-12-11 2004-06-24 Man Roland Druckmaschinen Ag Blanket cylinders for offset printing machines
US6854389B2 (en) 2002-12-11 2005-02-15 Man Roland Druckmaschinen Ag Blanket cylinder for offset presses

Also Published As

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US6038975A (en) 2000-03-21
CA2157318A1 (en) 1996-03-16
EP0704301B1 (en) 1998-12-02
DE59504404D1 (en) 1999-01-14
JPH0890751A (en) 1996-04-09
DE4432816A1 (en) 1996-03-21
CA2157318C (en) 2001-05-01
JP2865596B2 (en) 1999-03-08

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