EP0919379B1 - Method and device for transferring the trailing end of a sheet in a turn-over device of a printing machine - Google Patents

Method and device for transferring the trailing end of a sheet in a turn-over device of a printing machine Download PDF

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Publication number
EP0919379B1
EP0919379B1 EP98121101A EP98121101A EP0919379B1 EP 0919379 B1 EP0919379 B1 EP 0919379B1 EP 98121101 A EP98121101 A EP 98121101A EP 98121101 A EP98121101 A EP 98121101A EP 0919379 B1 EP0919379 B1 EP 0919379B1
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EP
European Patent Office
Prior art keywords
sheet
gripper device
trailing edge
conveying cylinder
downstream
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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.)
Expired - Lifetime
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EP98121101A
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German (de)
French (fr)
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EP0919379A1 (en
Inventor
Willi Becker
Andreas Dr. Fricke
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0919379A1 publication Critical patent/EP0919379A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines
    • B41F21/10Combinations of transfer drums and grippers
    • B41F21/106Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a method and an apparatus for transferring the Trailing edge of a sheet in a turning device Sheet-fed rotary printing machine according to the preamble of claims 1 and 11.
  • the suction gripper is inserted into the periphery of the downstream arch-guiding cylinder on a trochoidal track. Due to the transfer of the inside of the periphery The trailing edge of the sheet as well as the complexity of the gear used is with the described turning device a passable handover, especially at high production speeds, not possible. Furthermore, tend at device described the bow, especially in larger Paper weights, due to centrifugal force in their suction cups from Printing cylinder lifted off rear part to form a bulge, which one appropriate takeover by the following gripper devices additionally stands in the way.
  • DE-PS 38 29 626 C2 describes a sheet-fed rotary printing press with one Turning device, in which the Trailing edge of sheet by one from the periphery of a subordinate suction cup from the upstream swiveling cylinder Impression cylinder is lifted off.
  • the suction pad under the periphery of the downstream arc-guiding cylinder becomes the movement of the suction cup in the manner controlled by a gear that the bow against the direction of rotation of the downstream sheet-guiding cylinder be tightened.
  • the object of the invention is to achieve a method and a method Device for transferring the trailing edge of a printed sheet in one To create turning device of a sheet-fed rotary printing machine, which the Avoid disadvantages of the prior art and a passport and accurate register transfer of the trailing edge of the sheet even at high Production speeds as well as when processing large Ensure substrate thicknesses.
  • Die Sheet lifting means 12 can, for example, by one or more in the 2a to 2c and 3a to 3d, from the periphery 16 of the Subordinate arc-guiding cylinder 8 swing-out suction pad 18th be formed, as described for example in DE 38 29 626 C2.
  • the suction gripper 18 for transferring the Trailing edge 2 several machine angle degrees, for example 10 - 40 ° away from one between the turning centers 20a and 20b of the upstream and subordinate arc-guiding cylinders 4, 8 imaginary connecting line 22 out of the periphery 16 of the downstream sheet-guiding cylinder 8 and up to the periphery 24 of the upstream sheet-guiding cylinder 4 swung up where he trailed the 2 on the upstream sheet-guiding cylinder 4 guided sheet 6 grips.
  • the upstream sheet-guiding cylinder 4 can be, for example, an impression cylinder Printing unit, the one in relation to the associated plate cylinder and / or blanket cylinder has a double large diameter.
  • Swinging out the suction pad 18 in the figures in the area in front of the imaginary connecting line 22 is shown, this can also be done in the same way Passing the connecting line 22, i. H. in the area of the lower half of the 2a-2c, and 3a-3c, respectively.
  • 2a to 2c illustrated preferred embodiment of the invention is the Gripper device 14 preferably by a known, not by a shown cam gear pivotable about an axis of rotation 30 Gripper device formed, in which the one sheet holding surface 28a on one Gripper fingers 32 and the second sheet holding surface 28b on the gripper support 34 Gripper device 14 are formed.
  • the grasp from the peripheral 16 of the downstream arc-guiding cylinder 8 extended first and second Sheet holding surfaces 28a, 28b the rear edge 2 of the sheet 6 outside the Periphery 16 of the downstream sheet-guiding cylinder 8, while the The rear edge 2 of the sheet 6 is held taut by the suction gripper 18.
  • the Grip the sheet trailing edge 2 through the sheet holding surfaces 28a, 28b, or the Takeover of the trailing edge 2 of the suction pads 18 by the Sheet holding surfaces 28a, 28b of the gripper device 14 are preferably carried out on or in the area of one between the peripheries 16, 24 of the cylinders 4, 8 extending line 36 which is perpendicular to the the centers of rotation 20a, 20b of the Cylinder 4, 6 connecting imaginary line 22 is arranged. Because of Simplification, line 36 is referred to below as the tangent line, although strictly speaking they are in the center of the between the two Surfaces of the cylinders 6 and 8 formed gap, which for example, can have a gap width of several 1/10 mm. While the transfer of the sheet trailing edge 2 to the sheet holding surfaces 28a, 28b are the sheet holding surfaces and suction pads 18 with respect to the downstream cylinder 8 preferably at rest.
  • the transfer of the trailing edge 2 results outside the periphery 16 of the downstream sheet-guiding cylinder 8, in particular on or in the region of the tangent line 36 the advantage that the Transfer of the sheet trailing edge 2 to the sheet holding surfaces 28a, 28b of the Gripper device 14 until the release of the leading edge of the sheet associated gripper device of the upstream cylinder almost none Relative movements between the sheet holding surfaces 28a, 28b and Occur trailing edge 2. This has a negative impact on the Transfer register excluded in perfect and reverse printing.
  • the gripper device 14 after grabbing the trailing edge 2 and releasing the Front edge of the sheet pivoted back about the axis 30 that the Sheet trailing edge 2 holding sheet holding surfaces 28a, 28b before passing through the Line 22 into the periphery 16 of the downstream sheet-guiding cylinder 8 be reduced.
  • the pivoting of the gripper device 14 around the Axis 30 is preferably such that the sheet holding surfaces 28a, 28b essentially always in the direction of the bow leading from the upstream Cylinder 4 arc section 40 extending towards the gripper device 14 point. This ensures that the sheet-holding surfaces 28a, 28b held rear trailing edge 2 is not bent in a disadvantageous manner.
  • the gripper device 14 transfers the Back trailing edge 2 to another gripper device 42, the for example as one within the peripheral 16 of the downstream arc-guiding cylinder 8 arranged pivotable Pliers gripper device can be formed.
  • the further gripper device 42 can also have angled sheet holding surfaces 44a, 44b, and is at a further rotation of the cylinders 4, 8 preferably in that shown in Fig. 2d Way pivoted such that the trailing edge 2 after pivoting directly in the area of the periphery 16 of the downstream sheet-guiding Cylinder 8 runs.
  • the trailing edge 2 of the sheet Sheet 6 then in a known manner one not shown conventional gripper device of a further subordinate sheet-guiding cylinder, for example an impression cylinder in one subordinate printing unit to be handed over.
  • Figs. 3a to 3c illustrated embodiment of the Invention can the gripper device of the downstream Sheet guide cylinder 8 immediately known as a Pliers gripper device 114, which preferably has ball-shaped sheet holding surfaces 128a and 128b.
  • a Pliers gripper device 114 which preferably has ball-shaped sheet holding surfaces 128a and 128b.
  • the pliers gripper device 114 of the subordinate arc-guiding cylinder 8 for example by means of a not shown, on the gripper shaft 152 of the pliers gripper device 114 attacking swivel drive from the periphery 16 of the downstream arc-guiding cylinder 8 retractable.
  • the gripper device 114 Immediately after gripping the trailing edge 2 of the sheet 6 by the Sheet holding surfaces 128a, 128b of the gripper device 114 and after the Release of the leading edge of the sheet by the unspecified Gripper device, the gripper device 114 is in the direction of Arrow 150b in the periphery 16 of the downstream sheet leading Cylinder 8 retracted so that there is no collision Gripper device 114 with the surface of the upstream sheet-guiding Cylinder 4 comes when the trailing edge 2 holding Gripper device 114, the connecting line 22 between the turning centers 20a, 20b the cylinder 4, 8 happens.

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  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Übergabe der Hinterkante eines Bogens in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine gemäß dem Oberbegriff von Anspruch 1 und 11.The invention relates to a method and an apparatus for transferring the Trailing edge of a sheet in a turning device Sheet-fed rotary printing machine according to the preamble of claims 1 and 11.

Zum beidseitigen Bedrucken von bogenförmigem Material in einer Bogenrotationsdruckmaschine im Schön- und Widerdruckbetrieb ist es erforderlich, den Bogen nach dem Bedrucken der Bogenoberseite durch eine Wendeeinrichtung zu wenden, um den Bogen anschließend auf der Bogenrückseite bedrucken zu können.For double-sided printing of sheet material in one It is sheet-fed rotary printing press in perfecting mode required, the sheet after printing on the top of the sheet by a Turning device to turn the sheet on the To be able to print the back of the sheet.

Aus der DE-OS 24 51 987 ist eine Wendeeinrichtung bekannt, bei der im Schönund Widerdruckbetrieb die Hinterkante eines auf einem Gegendruckzylinder geführten Bogens durch einen aus der Peripherie eines nachgeordneten bogenführenden Zylinders herausschwenkbaren Sauggreifer ergriffen und vor dem Passieren der Übergabezentralen zwischen den beiden Zylindern in die Peripherie des nachgeordneten bogenführenden Zylinders geführt wird. In der Peripherie des nachgeordneten bogenführenden Zylinders wird die Bogenhinterkante dann einer weiteren Greifereinrichtung übergeben, welch letztere die Bogenhinterkante an eine dritte Greifereinrichtung übergibt, die ebenfalls innerhalb der Peripherie verschwenkbar angeordnet ist. Um eine zu Registerfehlern führende Relativbewegung zwischen der Bogenhinterkante und den noch auf dem Gegendruckzylinder haftenden Bogenteilen entgegenzutreten, wird der Sauggreifer beim Einfahren desselben in die Peripherie des nachgeordneten bogenführenden Zylinders auf einer Trochoidenbahn geführt. Aufgrund der im Inneren der Peripherie erfolgenden Übergabe der Bogenhinterkante sowie der Komplexität der verwendeten Getriebe ist mit der beschriebenen Wendeeinrichtung eine passerhaltige Übergabe, insbesondere bei hohen Fortdruckgeschwindigkeiten, nicht möglich. Weiterhin neigen bei der beschriebenen Vorrichtung die Bogen, insbesondere bei größeren Papiergewichten, fliehkraftbedingt in ihrem von den Sauggreifem vom Druckzylinder abgehobenen hinteren Teil zu einer Bauschen-Bildung, die einer passergerechten Übernahme durch die nachfolgenden Greifereinrichtungen zusätzlich entgegensteht.From DE-OS 24 51 987 a turning device is known in the Schönund Back pressure operation the trailing edge of one on an impression cylinder guided arch through one from the periphery of a subordinate gripped and swiveling suction cup gripped and in front passing the transfer centers between the two cylinders in the Periphery of the downstream sheet-guiding cylinder is guided. In the The periphery of the downstream sheet-guiding cylinder is the Then pass the trailing edge of the sheet to another gripper device, which the latter passes the trailing edge of the sheet to a third gripper device which is also arranged pivotably within the periphery. To one Relative movement between the trailing edge of the sheet and register errors to counter the sheet parts still adhering to the impression cylinder, the suction gripper is inserted into the periphery of the downstream arch-guiding cylinder on a trochoidal track. Due to the transfer of the inside of the periphery The trailing edge of the sheet as well as the complexity of the gear used is with the described turning device a passable handover, especially at high production speeds, not possible. Furthermore, tend at device described the bow, especially in larger Paper weights, due to centrifugal force in their suction cups from Printing cylinder lifted off rear part to form a bulge, which one appropriate takeover by the following gripper devices additionally stands in the way.

Die DE-PS 38 29 626 C2 beschreibt eine Bogenrotationsdruckmaschine mit einer Wendeeinrichtung, bei der im Schön- und Widerdruckbetrieb die Bogenhinterkante durch einen aus der Peripherie eines nachgeordneten bogenführenden Zylinders herausschwenkbaren Sauggreifer vom vorgeordneten Gegendruckzylinder abgehoben wird. Beim Zurückfahren des Sauggreifers unter die Peripherie des nachgeordneten bogenführenden Zylinders wird die Bewegung des Sauggreifers in der Weise durch ein Getriebe gesteuert, das die Bogen entgegen der Drehrichtung des nachgeordneten bogenführenden Zylinders gestrafft werden.DE-PS 38 29 626 C2 describes a sheet-fed rotary printing press with one Turning device, in which the Trailing edge of sheet by one from the periphery of a subordinate suction cup from the upstream swiveling cylinder Impression cylinder is lifted off. When returning the suction pad under the periphery of the downstream arc-guiding cylinder becomes the movement of the suction cup in the manner controlled by a gear that the bow against the direction of rotation of the downstream sheet-guiding cylinder be tightened.

Aufgrund der Übergabe der Bogenhinterkante durch die Sauggreifer innerhalb der Peripherie des nachgeordneten bogenführenden Zylinders entstehen bei den Vorrichtungen nach der DE-PS 38 29 626 C2 sowie der DE-OS 24 51 987 zwischen den Bogen und den im Inneren angeordneten Greifereinrichtungen vergleichsweise große Relativbewegungen, die bei einer fehlenden Nachführung der verwendeten Greifer und Sauger beispielsweise zu einem sogenannten "Rupfen" führen können, da der die Bogenvorderkante haltende Greifer noch geschlossen ist, welches wiederum gravierende Passerproblemen nach sich zieht. Weiterhin kann es aufgrund eines ungleichen Greiferschlusses, bzw. einer ungleichen Greiferöffnung, wie sie häufig zwischen der Antriebsseite und der Bedienerseite einer Bogenrotationsdruckmaschine aufgrund der Elastizität der Greiferwellen auftritt, zu einem zeitlich versetzten "Rupfen" zwischen der Antriebsseite und der Bedienerseite kommen. Die Ursachen für den unterschiedlichen Greiferschluß sind dynamisch bedingt und werden zum Beispiel durch unterschiedliche Greiferwellentorsion, Drehzahlunterschiede etc. hervorgerufen. Darüber hinaus können insbesondere bei dicken Bedruckstoffen Passerfehler verursachende Verspannungen der Bogen auftreten. Diese sind darauf zurückzuführen, daß der gemeinsame Greiferschluß zwischen dem Öffnen des Vorderkantengreifers des Gegendruckzylinders und dem Schließen des Hinterkantengreifers, welcher in der Regel im Bereich von ca. 1-2 Maschinenwinkelgraden liegt, in Folge der erhöhten Dicke der Bedruckstoffe weiter vergrößert wird.Due to the transfer of the trailing edge of the sheet by the suction pads within the The periphery of the subordinate sheet-guiding cylinder is created in the Devices according to DE-PS 38 29 626 C2 and DE-OS 24 51 987 between the sheet and the gripper devices arranged inside comparatively large relative movements that occur when there is no tracking the grippers and suction cups used, for example, to form a so-called "Plucking" can lead because the gripper still holding the leading edge of the sheet is closed, which in turn causes serious registration problems. Furthermore, it may be due to an uneven gripper closure, or one uneven gripper opening, as often between the drive side and the Operator side of a sheet-fed rotary printing press due to the elasticity of the Gripper shafts occur at a staggered "picking" between the Drive side and the operator side come. The causes of that different gripper closings are dynamic and are, for example due to different gripper shaft torsion, speed differences etc. caused. In addition, especially with thick substrates Tension of the elbows causing register errors occurs. These are due to the fact that the common gripper closure between the opening the front edge gripper of the impression cylinder and closing the Trailing edge gripper, which is usually in the range of approx. 1-2 The machine angle is due to the increased thickness of the substrates is further enlarged.

Durch die Erfindung soll die Aufgabe gelöst werden, ein Verfahren und eine Vorrichtung zur Übergabe der Hinterkante eines bedruckten Bogens in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine zu schaffen, welche die Nachteile des Standes der Technik vermeiden und die eine passerhaltige und registergenaue Übergabe der Bogenhinterkante auch bei hohen Fortdruckgeschwindigkeiten sowie bei der Verarbeitung von großen Bedruckstoffstärken sicherstellen.The object of the invention is to achieve a method and a method Device for transferring the trailing edge of a printed sheet in one To create turning device of a sheet-fed rotary printing machine, which the Avoid disadvantages of the prior art and a passport and accurate register transfer of the trailing edge of the sheet even at high Production speeds as well as when processing large Ensure substrate thicknesses.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale von Anspruch 1 und 11 gelöst.This object is achieved by the features of claims 1 and 11 solved.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Erfindung wird nachfolgend mit Bezug auf die Zeichnungen anhand von Beispielen beschrieben. In den Zeichnungen zeigen:

Fig. 1
eine schematische Darstellung eines vorgeordneten bogenführenden Zylinders und eines nachgeordneten bogenführenden Zylinders einer Wendeeinrichtung mit einer erfindungsgemäßen Vorrichtung zur Übergabe der Hinterkante des auf dem vorgeordneten bogenführenden Zylinders geführten Bogens,
Fig. 2a bis c
eine schematische Darstellung verschiedener Stadien der Übergabe der Hinterkante eines bedruckten Bogens bei einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung,
Fig. 3a bis d
eine schematische Darstellung verschiedener Stadien der Übergabe der Hinterkante eines bedruckten Bogens bei einer zweiten Ausführungsform der Erfindung, bei der die Greifereinrichtung des nachgeordneten bogenführenden Zylinders durch einen einzigen verschwenkbaren und aus der Peripherie des Zylinders verfahrbaren Zangengreifer gebildet wird.
The invention is described below with reference to the drawings using examples. The drawings show:
Fig. 1
1 shows a schematic representation of a preceding sheet-guiding cylinder and a subsequent sheet-guiding cylinder of a turning device with a device according to the invention for transferring the rear edge of the sheet guided on the preceding sheet-guiding cylinder,
2a to c
1 shows a schematic representation of different stages of the transfer of the rear edge of a printed sheet in a first embodiment of a device according to the invention,
3a to d
a schematic representation of different stages of the transfer of the rear edge of a printed sheet in a second embodiment of the invention, in which the gripper device of the downstream sheet-guiding cylinder is formed by a single pivotable and movable from the periphery of the cylinder gripper.

Wie in Fig. 1 dargestellt ist, umfaßt eine erfindungsgemäße Vorrichtung 1 zur Übergabe der Hinterkante 2 eines auf einem vorgeordneten bogenführenden Zylinder 4 geführten Bogens 6 an einen nachgeordneten bogenführenden Zylinder 8 einer Wendeeinrichtung 10, Bogenabhebemittel 12 sowie eine am nachgeordneten bogenführenden Zylinder angeordnete Greifereinrichtung 14. Die Bogenabhebemittel 12 können beispielsweise durch einen oder mehrere in den Fig. 2a bis 2c und 3a bis 3d dargestellten, aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 ausschwenkbaren Sauggreifer 18 gebildet sein, wie er beispielsweise in der DE 38 29 626 C2 beschrieben ist.As shown in Fig. 1, an inventive device 1 for Transfer of the rear edge 2 of a sheet leading on an upstream Cylinder 4 guided sheet 6 to a downstream sheet-guiding Cylinder 8 of a turning device 10, sheet lifting means 12 and a downstream gripping device arranged gripper device 14. Die Sheet lifting means 12 can, for example, by one or more in the 2a to 2c and 3a to 3d, from the periphery 16 of the Subordinate arc-guiding cylinder 8 swing-out suction pad 18th be formed, as described for example in DE 38 29 626 C2.

Wie in Fig. 2a gezeigt ist, wird der Sauggreifer 18 zur Übergabe der Bogenhinterkante 2 mehrere Maschinenwinkelgrade, beispielsweise 10 - 40° entfernt von einer zwischen den Drehzentren 20a und 20b des vorgeordneten und nachgeordneten bogenführenden Zylinders 4, 8 gedachten Verbindungslinie 22 aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 heraus und bis an die Peripherie 24 des vorgeordneten bogenführenden Zylinders 4 herangeschwenkt, wo er die Hinterkante 2 des auf dem vorgeordneten bogenführenden Zylinder 4 geführten Bogens 6 ergreift. Der vorgeordnete bogenführende Zylinder 4 kann beispielsweise ein Gegendruckzylinder eines Druckwerks sein, der einen im Verhältnis zum zugehörigen Plattenzylinder und/oder Gummituchzylinder doppelt großen Durchmesser aufweist. Obwohl das Herausschwenken des Sauggreifers 18 in den Figuren im Bereich vor der gedachten Verbindungslinie 22 gezeigt ist, kann dies in gleicher Weise auch nach Passieren der Verbindungslinie 22, d. h. im Bereich der unteren Hälfte der Fig. 2a - 2c, bzw. 3a - 3c, erfolgen.As shown in Fig. 2a, the suction gripper 18 for transferring the Trailing edge 2 several machine angle degrees, for example 10 - 40 ° away from one between the turning centers 20a and 20b of the upstream and subordinate arc-guiding cylinders 4, 8 imaginary connecting line 22 out of the periphery 16 of the downstream sheet-guiding cylinder 8 and up to the periphery 24 of the upstream sheet-guiding cylinder 4 swung up where he trailed the 2 on the upstream sheet-guiding cylinder 4 guided sheet 6 grips. The upstream sheet-guiding cylinder 4 can be, for example, an impression cylinder Printing unit, the one in relation to the associated plate cylinder and / or blanket cylinder has a double large diameter. Although that Swinging out the suction pad 18 in the figures in the area in front of the imaginary connecting line 22 is shown, this can also be done in the same way Passing the connecting line 22, i. H. in the area of the lower half of the 2a-2c, and 3a-3c, respectively.

Nachdem der Sauger des Sauggreifers 18 die Bogenhinterkante 2 ergriffen hat, schwenkt dieser in Richtung der Peripherie 16 des Zylinders 8 zurück, wobei der Schwenkvorgang durch ein nicht näher dargestelltes Kurvengetriebe gesteuert wird. Hierbei kann es vorgesehen sein, daß die'Bewegung des Sauggreifers 18 durch das nicht dargestellte Getriebe in der Weise gesteuert erfolgt, daß der Bogen 6 entgegen der durch die Pfeile 26a, 26b angedeuteten Drehrichtung der Zylinder 4, 8 gestrafft wird, während der Bogen 6 noch vollständig auf der Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 4 aufliegt. In gleicher Weise kann es jedoch auch vorgesehen sein, daß ein Straffen des Bogens 6 durch den Sauggreifer 18 zusätzlich auch während und/oder nach dem Abheben der Bogenhinterkante 2 von der Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 4 erfolgt.After the suction device of the suction gripper 18 has gripped the trailing edge 2 of the sheet, pivots back in the direction of the periphery 16 of the cylinder 8, the Swivel process controlled by a cam gear, not shown becomes. It can be provided here that the movement of the suction gripper 18 controlled by the transmission, not shown, in such a way that the Bow 6 against the direction of rotation indicated by the arrows 26a, 26b Cylinder 4, 8 is tightened while the sheet 6 is still completely on the Circumferential surface of the upstream sheet-guiding cylinder 4 rests. In in the same way, however, it can also be provided that a tightening of the Sheet 6 by the suction pad 18 also during and / or after Lifting the sheet trailing edge 2 from the peripheral surface of the upstream sheet-guiding cylinder 4 takes place.

Im wesentlichen gleichzeitig mit dem Erfassen und/oder Abheben der Bogenhinterkante 2 durch den Sauggreifer 18 werden die Bogenhalteflächen 28a und 28b der Greifereinrichtung 14 aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 herausgefahren. In der in den Fig. 2a bis 2c dargestellten bevorzugten Ausführungsform der Erfindung wird die Greifereinrichtung 14 vorzugsweise durch eine bekannte, über ein nicht dargestelltes Kurvengetriebe um eine Drehachse 30 verschwenkbare Greifereinrichtung gebildet, bei der die eine Bogenhaltefläche 28a an einem Greiferfinger 32 und die zweite Bogenhaltefläche 28b an der Greiferauflage 34 der Greifereinrichtung 14 gebildet sind.Essentially simultaneously with the detection and / or lifting of the Sheet trailing edge 2 by the suction pad 18 become the sheet holding surfaces 28a and 28b of the gripper device 14 from the periphery 16 of the downstream one retracted sheet-guiding cylinder 8. 2a to 2c illustrated preferred embodiment of the invention is the Gripper device 14 preferably by a known, not by a shown cam gear pivotable about an axis of rotation 30 Gripper device formed, in which the one sheet holding surface 28a on one Gripper fingers 32 and the second sheet holding surface 28b on the gripper support 34 Gripper device 14 are formed.

Wie in Fig. 2b gezeigt ist, ergreifen die aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 herausgefahrenen ersten und zweiten Bogenhalteflächen 28a, 28b die Hinterkante 2 des Bogens 6 außerhalb der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8, während die Hinterkante 2 des Bogens 6 durch den Sauggreifer 18 gestrafft gehalten wird. Das Ergreifen der Bogenhinterkante 2 durch die Bogenhalteflächen 28a, 28b, bzw. die Übernahme der Bogenhinterkante 2 von den Sauggreifern 18 durch die Bogenhalteflächen 28a, 28b der Greifereinrichtung 14 erfolgt dabei vorzugsweise auf oder im Bereich einer zwischen den Peripherien 16, 24 der Zylinder 4, 8 verlaufenden Linie 36, die senkrecht zu der die Drehzentren 20a, 20b der Zylinder 4, 6 verbindenden gedachten Linie 22 angeordnet ist. Aus Gründen der Vereinfachung wird die Linie 36 nachfolgend als Tangentenlinie bezeichnet, obgleich sie sich genaugenommen im Zentrum des zwischen den beiden Oberflächen der Zylinder 6 und 8 gebildeten Spalts befindet, welcher beispielsweise eine Spaltbreite von mehreren 1/10 mm aufweisen kann. Während der Übergabe der Bogenhinterkante 2 an die Bogenhalteflächen 28a, 28b befinden sich die Bogenhalteflächen und der Sauggreifer 18 bezüglich des nachgeordneten Zylinders 8 vorzugsweise in Ruhe.As shown in Fig. 2b, the grasp from the peripheral 16 of the downstream arc-guiding cylinder 8 extended first and second Sheet holding surfaces 28a, 28b the rear edge 2 of the sheet 6 outside the Periphery 16 of the downstream sheet-guiding cylinder 8, while the The rear edge 2 of the sheet 6 is held taut by the suction gripper 18. The Grip the sheet trailing edge 2 through the sheet holding surfaces 28a, 28b, or the Takeover of the trailing edge 2 of the suction pads 18 by the Sheet holding surfaces 28a, 28b of the gripper device 14 are preferably carried out on or in the area of one between the peripheries 16, 24 of the cylinders 4, 8 extending line 36 which is perpendicular to the the centers of rotation 20a, 20b of the Cylinder 4, 6 connecting imaginary line 22 is arranged. Because of Simplification, line 36 is referred to below as the tangent line, although strictly speaking they are in the center of the between the two Surfaces of the cylinders 6 and 8 formed gap, which for example, can have a gap width of several 1/10 mm. While the transfer of the sheet trailing edge 2 to the sheet holding surfaces 28a, 28b are the sheet holding surfaces and suction pads 18 with respect to the downstream cylinder 8 preferably at rest.

Wie sich gezeigt hat, ergibt sich durch die Übergabe der Bogenhinterkante 2 außerhalb der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8, insbesondere auf oder im Bereich der Tangentenlinie 36 der Vorteil, daß bei der Übergabe der Bogenhinterkante 2 an die Bogenhalteflächen 28a, 28b der Greifereinrichtung 14 bis zur Freigabe der Bogenvorderkante durch die zugehörige Greifereinrichtung des vorgeordneten Zylinders nahezu keine Relativbewegungen zwischen den Bogenhalteflächen 28a, 28b und der Bogenhinterkante 2 auftreten. Hierdurch sind negative Auswirkungen auf den Übergabepasser im Schön- und Widerdruckbetrieb ausgeschlossen. So bewegen sich die Relativbewegungen bei der erfindungsgemäßen Vorrichtung im Bereich von wenigen 1/1000 mm pro Maschinenwinkelgrad, wohingegen bei bekannten Wendeeinrichtungen mit Übergabe deutlich unterhalb der Peripherie, die Relativbewegungen bis zu mehreren 1/10 mm pro Maschinenwinkelgrad betragen können. As has been shown, the transfer of the trailing edge 2 results outside the periphery 16 of the downstream sheet-guiding cylinder 8, in particular on or in the region of the tangent line 36 the advantage that the Transfer of the sheet trailing edge 2 to the sheet holding surfaces 28a, 28b of the Gripper device 14 until the release of the leading edge of the sheet associated gripper device of the upstream cylinder almost none Relative movements between the sheet holding surfaces 28a, 28b and Occur trailing edge 2. This has a negative impact on the Transfer register excluded in perfect and reverse printing. So move the relative movements in the device according to the invention are in the range of a few 1/1000 mm per machine angle degree, whereas with known ones Turning devices with transfer well below the periphery Relative movements up to several 1/10 mm per machine angle degree can.

Wie in Fig. 2c durch den Pfeil 38 angedeutet ist, wird die Greifereinrichtung 14 nach dem Ergreifen der Bogenhinterkante 2 und der Freigabe der Bogenvorderkante in der Weise um die Achse 30 zurückverschwenkt, daß die die Bogenhinterkante 2 haltenden Bogenhalteflächen 28a, 28b vor dem Passieren der Linie 22 in die Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 zurückgefahren werden. Das Verschwenken der Greifereinrichtung 14 um die Achse 30 erfolgt dabei vorzugsweise derart, daß die Bogenhalteflächen 28a, 28b im wesentlichen stets in Richtung des sich vom vorgeordneten bogenführenden Zylinder 4 zur Greifereinrichtung 14 hin erstreckenden Bogenabschnitts 40 weisen. Hierdurch wird sichergestellt, daß die von den Bogenhalteflächen 28a, 28b gehaltene Bogenhinterkante 2 nicht in nachteiliger Weise abgeknickt wird.As indicated in FIG. 2c by the arrow 38, the gripper device 14 after grabbing the trailing edge 2 and releasing the Front edge of the sheet pivoted back about the axis 30 that the Sheet trailing edge 2 holding sheet holding surfaces 28a, 28b before passing through the Line 22 into the periphery 16 of the downstream sheet-guiding cylinder 8 be reduced. The pivoting of the gripper device 14 around the Axis 30 is preferably such that the sheet holding surfaces 28a, 28b essentially always in the direction of the bow leading from the upstream Cylinder 4 arc section 40 extending towards the gripper device 14 point. This ensures that the sheet-holding surfaces 28a, 28b held rear trailing edge 2 is not bent in a disadvantageous manner.

Wie weiterhin in Fig. 2c dargestellt ist, übergibt die Greifereinrichtung 14 die Bogenhinterkante 2 anschließend an eine weitere Greifereinrichtung 42, die beispielsweise als eine innerhalb der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 angeordnete verschwenkbare Zangengreifereinrichtung ausgebildet sein kann. Die weitere Greifereinrichtung 42 kann ferner abgewinkelte Bogenhalteflächen 44a, 44b aufweisen, und wird bei einer Weiterdrehung der Zylinder 4, 8 vorzugsweise in der in Fig. 2d gezeigten Weise derart verschwenkt, daß die Bogenhinterkante 2 nach dem Verschwenken unmittelbar im Bereich der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 verläuft. Hierdurch kann die Bogenhinterkante 2 des gewendeten Bogens 6 anschließend in bekannter Weise einer nicht dargestellten herkömmlichen Greifereinrichtung eines weiteren nachgeordneten bogenführenden Zylinders, beispielsweise eines Gegendruckzylinders in einem nachgeordneten Druckwerk übergeben werden.2c, the gripper device 14 transfers the Back trailing edge 2 to another gripper device 42, the for example as one within the peripheral 16 of the downstream arc-guiding cylinder 8 arranged pivotable Pliers gripper device can be formed. The further gripper device 42 can also have angled sheet holding surfaces 44a, 44b, and is at a further rotation of the cylinders 4, 8 preferably in that shown in Fig. 2d Way pivoted such that the trailing edge 2 after pivoting directly in the area of the periphery 16 of the downstream sheet-guiding Cylinder 8 runs. As a result, the trailing edge 2 of the sheet Sheet 6 then in a known manner one not shown conventional gripper device of a further subordinate sheet-guiding cylinder, for example an impression cylinder in one subordinate printing unit to be handed over.

Gemäß einer weiteren, in den Figs. 3a bis 3c dargestellten Ausführungsform der Erfindung kann die Greifereinrichtung des nachgeordneten Bogenführungszylinders 8 unmittelbar als eine bekannte Zangengreifereinrichtung 114 ausgebildet sein, welche vorzugsweise ballenförmige Bogenhalteflächen 128a und 128b aufweist. Wie in Fig. 3b durch die Pfeile 150a und 150b angedeutet, ist die Zangengreifereinrichtung 114 des nachgeordneten bogenführenden Zylinders 8, beispielsweise mittels eines nicht dargestellten, an der Greiferwelle 152 der Zangengreifereinrichtung 114 angreifenden Schwenkantriebs aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 herausfahrbar.According to another, in Figs. 3a to 3c illustrated embodiment of the Invention can the gripper device of the downstream Sheet guide cylinder 8 immediately known as a Pliers gripper device 114, which preferably has ball-shaped sheet holding surfaces 128a and 128b. As shown in Fig. 3b the arrows 150a and 150b indicated, the pliers gripper device 114 of the subordinate arc-guiding cylinder 8, for example by means of a not shown, on the gripper shaft 152 of the pliers gripper device 114 attacking swivel drive from the periphery 16 of the downstream arc-guiding cylinder 8 retractable.

In gleicher Weise wie bei der im Zusammenhang mit den Figs. 2a bis 2d beschriebenen Ausführungsform der Erfindung, übernehmen die Bogenhalteflächen 128a und 128b der Zangengreifereinrichtung 114 die Hinterkante 2 des durch den Sauggreifer 18 vom vorgeordneten bogenführenden Zylinder 4 abgehobenen Bogens 6 außerhalb der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 vorzugsweise im Bereich der Tangentenlinie 36, wie dies in Fig. 3b gezeigt ist. Während der Übergabe der Bogenhinterkante 2 an die Bogenhalteflächen 128a, 128b der Greifereinrichtung 114 befinden sich die Bogenhalteflächen und der Sauggreifer 18 bezüglich des nachgeordneten Zylinders 8 vorzugsweise in Ruhe.In the same way as in the context of FIGS. 2a to 2d described embodiment of the invention, take over Sheet holding surfaces 128a and 128b of the gripper device 114 die Trailing edge 2 of the upstream through the suction pad 18 from the leading sheet Cylinder 4 lifted sheet 6 outside the periphery 16 of the Subordinate arc-guiding cylinder 8 preferably in the area of Tangent line 36, as shown in Fig. 3b. During the handover of the Sheet trailing edge 2 to the sheet holding surfaces 128a, 128b of the Gripper device 114 are the sheet holding surfaces and the Suction pad 18 with respect to the downstream cylinder 8, preferably at rest.

Unmittelbar nach dem Ergreifen der Bogenhinterkante 2 des Bogens 6 durch die Bogenhalteflächen 128a, 128b der Zangengreifereinrichtung 114 und nach der Freigabe der Bogenvorderkante durch die nicht näher bezeichneten Greifereinrichtung wird die Zangengreifereinrichtung 114 in Richtung des Pfeiles 150b in die Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 zurückgefahren, so daß es nicht zu einer Kollision der Greifereinrichtung 114 mit der Oberfläche des vorgeordneten bogenführenden Zylinders 4 kommt, wenn die die Bogenhinterkante 2 haltende Greifereinrichtung 114 die Verbindungslinie 22 zwischen den Drehzentren 20a, 20b der Zylinder 4, 8 passiert.Immediately after gripping the trailing edge 2 of the sheet 6 by the Sheet holding surfaces 128a, 128b of the gripper device 114 and after the Release of the leading edge of the sheet by the unspecified Gripper device, the gripper device 114 is in the direction of Arrow 150b in the periphery 16 of the downstream sheet leading Cylinder 8 retracted so that there is no collision Gripper device 114 with the surface of the upstream sheet-guiding Cylinder 4 comes when the trailing edge 2 holding Gripper device 114, the connecting line 22 between the turning centers 20a, 20b the cylinder 4, 8 happens.

In gleicher Weise wie bei der Ausführungsform nach den Figuren 2a bis 2d kann es auch bei der in den Figuren 3a bis 3c gezeigten Ausführungsform der Erfindung vorgesehen sein, daß die Zangengreifereinrichtung 114 während und/oder nach dem Einfahren in die Peripherie 16 des Zylinders 8 in der Weise verschwenkt wird, daß die Hinterkante 2 des Bogens 6 beim Weiterdrehen der Zylinder 4, 8 im wesentlichen tangential in den balligen Bogenhalteflächen 128a, 128b liegt und bezüglich des sich vom vorgeordneten bogenführenden Zylinder 4 zur Greifereinrichtung 114 erstreckenden Bogenabschnitts 40 nicht abgewinkelt wird (Fig. 3c).In the same way as in the embodiment according to FIGS. 2a to 2d it also in the embodiment shown in Figures 3a to 3c Invention can be provided that the pliers gripper device 114 during and / or after entering the periphery 16 of the cylinder 8 in the manner is pivoted that the rear edge 2 of the sheet 6 when turning the Cylinders 4, 8 are essentially tangential in the spherical arch-holding surfaces 128a, 128b lies and with respect to the cylinder 4 leading from the upstream arc arc section 40 extending to gripper device 114 is not angled will (Fig. 3c).

Der Weg, um den die Greifereinrichtung 14 von Figs. 2, bzw. die Zangengreifereinrichtung 114 von Figs. 3 aus der Peripherie 16 des nachgeordneten bogenführenden Zylinders 8 herausfahrbar ist, liegt beispielsweise im Bereich von mehreren mm. The path by which the gripper device 14 of Figs. 2, or the Plier gripper device 114 from FIGS. 3 from the periphery 16 of the subordinate sheet-guiding cylinder 8 can be moved out for example in the range of several mm.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
erfindungsgemäße Vorrichtungdevice according to the invention
22
BogenhinterkanteSheet trailing edge
44
vorgeordneter bogenführender Zylinderupstream bow-guiding cylinder
66
Bogenarc
88th
nachgeordneter bogenführender Zylinderdownstream arc-guiding cylinder
1010
Wendeeinrichtungturning device
1212
BogenabhebemittelBogenabhebemittel
1414
GreifereinrichtungGripper device
1616
Peripherie des nachgeordneten bogenführenden ZylindersPeriphery of the downstream sheet-guiding cylinder
1818
SauggreiferSuction pads
20a, b20a, b
Drehzentrumturning center
2222
Verbindungslinieconnecting line
2424
Peripherie des vorgeordneten bogenführenden ZylindersPeriphery of the upstream sheet-guiding cylinder
26a, b26a, b
Drehrichtung des ZylindersDirection of rotation of the cylinder
28a28a
Bogenhaltefläche der Greifereinrichtung 14Sheet holding surface of the gripper device 14
28b28b
BogenhalteflächeSheet holding area
3030
Schwenkachseswivel axis
3232
Greiferfingergripper fingers
3434
GreiferauflageGripper pad
3636
Tangentenlinietangent line
3838
Pfeilarrow
4040
Bogenabschnittarc section
4242
weitere Greifereinrichtungfurther gripper device
44a, b44a, b
abgewinkelte Bogenhaltefläche der weiteren Greifereinrichtungangled sheet holding surface of the further gripper device
114114
ZangengreifereinrichtungPincer gripper device
128a, b128a, b
Bogenhalteflächen der Greifereinrichtung nach Fig. 3Sheet holding surfaces of the gripper device according to FIG. 3
152152
Greiferwelle der ZangengreifereinrichtungGripper shaft of the gripper device

Claims (22)

  1. A method for transferring the trailing edge of a sheet which is conveyed on an upstream sheet-conveying cylinder, in particular a impression cylinder, to a gripper device which belongs to a downstream sheet-conveying cylinder, has sheet-holding surfaces and takes over the sheet trailing edge, in a turning device of a sheet-fed rotary printing machine,
    characterized by
    the following steps:
    lifting means lift the sheet trailing edge from the upstream sheet-conveying cylinder,
    the sheet-holding surfaces of the gripper device are moved out of the periphery of the downstream sheet-conveying cylinder,
    the sheet-holding surfaces take over the sheet trailing edge outside the periphery, and
    the sheet-holding surfaces are moved back into the periphery of the downstream sheet-conveying cylinder.
  2. The method as claimed in claim 1,
    characterized in that the sheet-holding surfaces take over the sheet trailing edge a few degrees of arc away from an imaginary connecting line between the centers of rotation of the upstream and the downstream sheet-conveying cylinders.
  3. The method as claimed in one of the preceding claims,
    characterized in that the sheet-holding surfaces take over the sheet trailing edge on or in the region of a line which runs between the peripheries of the cylinders and is arranged perpendicular to an imaginary connecting line between the centers of rotation of the upstream and downstream sheet-conveying cylinders.
  4. The method as claimed in one of the preceding claims,
    characterized in that the sheet-holding surfaces of the gripper device of the downstream sheet-conveying cylinder can be moved several millimeters out of the periphery of said cylinder.
  5. The method as claimed in one of the preceding claims,
    characterized in that the sheet-holding surfaces are moved out of the periphery of the downstream sheet-conveying cylinder, and moved back into said periphery, by pivoting the gripper device.
  6. The method as claimed in one of the preceding claims,
    characterized in that, during the transfer of the sheet trailing edge to the sheet-holding surfaces of the gripper device, the sheet-holding surfaces of the gripper device and the sheet lifting means are at rest with respect to the downstream sheet-conveying cylinder.
  7. The method as claimed in one of the preceding claims,
    characterized in that the sheet trailing edge is lifted from the upstream sheet-conveying cylinder by a suction gripper that can be pivoted out of the periphery of the downstream sheet-conveying cylinder.
  8. The method as claimed in one of the preceding claims,
    characterized in that the sheet-holding means tauten the sheet before the sheet trailing edge is transferred to the gripper device.
  9. The method as claimed in one of the preceding claims,
    characterized in that, once it has gripped the sheet trailing edge, the gripper device of the downstream sheet-conveying cylinder is pivoted in such a way that the sheet-holding surfaces are oriented essentially in the direction of that section of the sheet which extends from the upstream sheet-conveying cylinder to the gripper device of the downstream sheet-conveying cylinder.
  10. The method as claimed in one of the preceding claims,
    characterized in that the gripper device of the downstream sheet-conveying cylinder transfers the trailing edge of the sheet to a further gripper device of the downstream sheet-conveying cylinder.
  11. An apparatus for transferring the trailing edge (2) of a sheet (6) which is guided on an upstream sheet-conveying cylinder (4) to a downstream sheet-conveying cylinder (8) of a turning device (10) in a sheet-fed rotary printing machine,
    characterized by
    lifting means (12) to lift the sheet trailing edge (2) from the upstream sheet-conveying cylinder (4), and a gripper device (14, 114) which is arranged on the downstream sheet-conveying cylinder (8) and has sheet-holding surfaces (28a, 28b; 128a, 128b) which can be moved out of the periphery (16) of the downstream sheet-conveying cylinder (8), take over the sheet trailing edge (2) from the lifting means (12) outside the periphery (16) and, after taking over said edge, are moved back into the periphery (16).
  12. The apparatus as claimed in claim 11,
    characterized in that the sheet-holding surfaces (28a, 28b; 128a, 128b) take over the sheet trailing edge (2) a few degrees of arc away from an imaginary connecting line (22) between the centers of rotation (20a, 20b) of the upstream and the downstream sheet-conveying cylinders (4, 8).
  13. The apparatus as claimed in claim 11 or 12,
    characterized in that the sheet-holding surfaces of the gripper device (14, 114) can be moved several millimeters out of the periphery (16).
  14. The apparatus as claimed in one of claims 11 to 13,
    characterized in that the sheet-holding surfaces (28a, 28b; 128a, 128b) of the gripper device (14, 114) take over the sheet trailing edge (2) on or in the region of a line (36) which runs between the peripheries (16, 24) of the cylinders (8, 4) and is arranged perpendicular to an imaginary connecting line (22) between the centers of rotation (20a, 20b) of the upstream and downstream sheet-conveying cylinders (4, 8).
  15. The apparatus as claimed in one of claims 11 to 14,
    characterized in that the gripper device (14, 114) can be pivoted in such a way that the sheet-holding surfaces (28a, 28b; 128a, 128b) are oriented essentially in the direction of that section (40) of the sheet which extends from the upstream sheet-conveying cylinder (4) to the gripper device (14, 114).
  16. The apparatus as claimed in one of claims 11 to 15,
    characterized in that, during the transfer of the sheet trailing edge (2) to the sheet-holding surfaces of the gripper device (14, 114), the sheet-holding surfaces (28a, 28b; 128a, 128b) of the gripper device (14, 114) and the sheet lifting means (12) are at rest with respect to the downstream sheet-conveying cylinder (8).
  17. The apparatus as claimed in one of claims 11 to 16,
    characterized in that the sheet lifting means are formed by a suction gripper (18) that can be pivoted out of the periphery (16) of the downstream sheet-conveying cylinder (8).
  18. The apparatus as claimed in one of claims 11 to 17,
    characterized in that the sheet lifting means (12, 18) are constructed in such a way that they tauten the sheet before the sheet trailing edge (2) is taken over by the gripper device (14, 114).
  19. The apparatus as claimed in one of claims 11 to 18,
    characterized in that a further gripper device (42), which takes over the sheet trailing edge (2), is provided on the downstream sheet-conveying cylinder (8).
  20. The apparatus as claimed in claim 19,
    characterized in that the further gripper device (42) contains a tongs-like gripper.
  21. The apparatus as claimed in one of claims 11 to 18,
    characterized in that the gripper device is formed by a tongs-like gripper device (114).
  22. The apparatus as claimed in one of claims 11 to 21,
    characterized in that the upstream sheet-conveying cylinder (4) is a impression cylinder.
EP98121101A 1997-11-28 1998-11-06 Method and device for transferring the trailing end of a sheet in a turn-over device of a printing machine Expired - Lifetime EP0919379B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19752680A DE19752680A1 (en) 1997-11-28 1997-11-28 Method and device for transferring the trailing edge of a sheet in a turning device of a sheet-fed rotary printing press
DE19752680 1997-11-28

Publications (2)

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EP0919379A1 EP0919379A1 (en) 1999-06-02
EP0919379B1 true EP0919379B1 (en) 2002-07-03

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EP98121101A Expired - Lifetime EP0919379B1 (en) 1997-11-28 1998-11-06 Method and device for transferring the trailing end of a sheet in a turn-over device of a printing machine

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US (1) US6089157A (en)
EP (1) EP0919379B1 (en)
JP (1) JPH11221905A (en)
CN (1) CN1161232C (en)
CZ (1) CZ292401B6 (en)
DE (2) DE19752680A1 (en)
RU (1) RU2211149C2 (en)

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RU2211149C2 (en) 2003-08-27
DE19752680A1 (en) 1999-06-02
CN1218741A (en) 1999-06-09
CN1161232C (en) 2004-08-11
JPH11221905A (en) 1999-08-17
DE59804646D1 (en) 2002-08-08
CZ302798A3 (en) 1999-06-16
EP0919379A1 (en) 1999-06-02
CZ292401B6 (en) 2003-09-17
US6089157A (en) 2000-07-18

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