EP0773179B1 - Dispositif pour faire des piles auxiliaires pendant l'échange en continue de piles dans un empileur d'une machine à imprimer - Google Patents

Dispositif pour faire des piles auxiliaires pendant l'échange en continue de piles dans un empileur d'une machine à imprimer Download PDF

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Publication number
EP0773179B1
EP0773179B1 EP96117493A EP96117493A EP0773179B1 EP 0773179 B1 EP0773179 B1 EP 0773179B1 EP 96117493 A EP96117493 A EP 96117493A EP 96117493 A EP96117493 A EP 96117493A EP 0773179 B1 EP0773179 B1 EP 0773179B1
Authority
EP
European Patent Office
Prior art keywords
sheet
separator
separator blade
sheets
conveying direction
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.)
Expired - Lifetime
Application number
EP96117493A
Other languages
German (de)
English (en)
Other versions
EP0773179A2 (fr
EP0773179A3 (fr
Inventor
Rainer Klenk
Richard Mack
Gerd Raasch
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0773179A2 publication Critical patent/EP0773179A2/fr
Publication of EP0773179A3 publication Critical patent/EP0773179A3/fr
Application granted granted Critical
Publication of EP0773179B1 publication Critical patent/EP0773179B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/32—Auxiliary devices for receiving articles during removal of a completed pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/426—Forming batches
    • B65H2301/4262—Forming batches by inserting auxiliary support as defined in B65H31/32
    • B65H2301/42622—Forming batches by inserting auxiliary support as defined in B65H31/32 and using auxiliary means for facilitating introduction of the auxiliary support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a device for auxiliary stack formation in Non-stop stack change in the delivery of a printing press according to the generic term of Claim 1.
  • Such training features are known from DE 12 31 721 C1.
  • a machine insertable between two incoming sheets in the sheet conveying direction In the known version, slatted frame forms the auxiliary stack carrier to which the Sheets temporarily form an auxiliary stack so that the main stack is removed and on new main stack carrier can be brought into position.
  • the stack is changed while the machine is running and printing continues. At least on machines with higher ones Printing speeds is a reduction in batch changes Machine speed required to insert the slatted frame between to enable two successive arches. The course of the If necessary, the stack can be changed automatically.
  • Other Auxiliary stack carrier designs which are suitable for mechanical insertion, are disclosed for example by DE 30 28 865 A1 or DE 42 21 928 A1.
  • auxiliary stack carriers in this or modified training could have so far been thinner in high-speed machines, especially when machining Paper types, do not enforce. Inserting and poses a big problem Pull out the auxiliary stack carrier and the caused thereby Bow damage.
  • the object of the invention is to design a device for automatic ongoing non-stop stack change in the delivery of a printing press, which especially for sheet printing machines with high printing speed without Speed reduction is suitable and damage to the laid out arches avoids.
  • the invention solves this problem with a device according to claim 1.
  • the holding device provided thereafter secures that on the separating belt overlying bow against damage.
  • the separating sword is very dense even at high printing speeds consecutive sheets between two sheets in the area of the trailing edge of the incoming arches can be inserted and creates a gap all over Arc width with a greater height than the arc distance from each other, in which is then an auxiliary stack carrier suitable training with activated text holding device can be inserted.
  • the separating sword supports the upper arch only in the area its trailing edge over the entire width of the sheet.
  • the holding device is a separating wedge, which can be acted upon by suction air and on its wedge-shaped Surface has suction nozzles.
  • This separating wedge works with the separating sword in the Way together that the movable wedge in the sheet conveying direction Separating sword as soon as this in the trailing edge area between two successive incoming arches is inserted, under-run and then through the upper arch Suction in the rear edge area holds until the auxiliary stack carrier is retracted.
  • the retention device comprises one or more Grippers that grip and hold the upper sheet at the rear edge, at the Auxiliary stack carrier is retracted.
  • the separating sword is preferably located at a cross to the sheet conveying direction circumferentially drivable band, in particular a steel band, formed this belt is mounted in a carriage that is adjustable in the direction of sheet conveyance is so that the separating sword can be adjusted to the sheet format.
  • the separating sword can be attached to the steel belt by an angle to the sheet conveying direction extending widening be formed.
  • the separating sword moves with it a kind of cutting movement between two successively arriving sheets.
  • the insertion of the separating sword is thereby even with the smallest time Spaces between two successively arriving sheets.
  • the gap formed by the separating sword can be by driving under the Separating swords are stabilized with the separating wedge, the separating wedge bottom sheet of the auxiliary stack now forming through at its rear edge Suction holds so that a suitable auxiliary stack carrier under the separating wedge into the gap now enlarged, for example, by lowering the main stack can be inserted.
  • Both bar rakes as well as auxiliary pile carriers are Auxiliary stacking boards, for example so-called hurdle boards, are suitable.
  • FIG. 1-4 shows an embodiment of the Subject of the invention, in which a separating sword 1 on an endlessly rotating Steel band 2 formed and a linearly guided in the sheet conveying direction Separating wedge 3 is movable at a level below the separating sword 1.
  • a known auxiliary stack carrier 4 for Example a bar rake, a hurdle board or the like, also linear movably guided so that the auxiliary stack carrier in the sheet conveying direction in the through the Separating sword 1 in cooperation with the separating wedge 3 between two arches in the Sheet stack 5 formed gap is insertable and incoming sheets themselves temporarily in an auxiliary stack in a manner known per se, so that the Main stack can be changed.
  • the steel strip 2 is over two upper deflection rollers 6 and two lower deflection rollers 7 guided like a portal, so that for example by endless conveyor chains with it attached sheet gripper bridges caused sheet transport from the printing press to to the sheet stack 5 through this portal and the incoming sheets with the participation of any brake bands 20 for storage on the sheet stack 5 be slowed down.
  • the steel strip 2 is below the incoming arches Area of maximum arc width by a transverse crossmember 8 horizontally guided parallel to the arch plane.
  • the rear edge of the Endless steel strip 2 has a bevel 9, each in the same Vertical plane both in the deflection rollers 6 and 7 and in the crossmember 8 arranged guide groove 10 engages.
  • the separating wedge 3 is arranged below the crossmember 8 and in the sheet conveying direction slidable.
  • the separating wedge 3 has a hollow box profile in cross section, the Interior to a suction air source, preferably to the suction air system of the machine, connected.
  • the top of the front in the insertion direction of the separating wedge 3 The area is chamfered up to a wedge-shaped tip and has suction air openings 3a on.
  • the separating wedge 3 can extend continuously over the sheet width or from several parts arranged next to each other across the width of the sheet be composed.
  • the guide rollers that guide the steel strip are 6 and 7 in a carriage 11 mounted, the side parts of which on the side walls 12 of the frame the machine is guided horizontally.
  • the traverse 8 connects the side parts of the carriage 11, which are interconnected by further cross members 13.
  • On this carriage 11 is also the separating wedge 3 in the sheet conveying direction horizontally movable, so that a format setting together with the Separating sword 1 takes place.
  • the in guides 14 of the side parts 12 of the machine frame horizontally movable carriage 11 is for format adjustment, for example, by a Chain 15 connected to drive means.
  • pneumatic drives made of compressed air Piston-cylinder units are provided for driving the belt 2 which can be driven transversely to the sheet conveying direction with the separating sword 1 formed thereon and the separating wedge 3 in the sheet conveying direction.
  • the pneumatic drive for the Horizontal movement of the separating wedge 3 is shown schematically in FIG. 2.
  • the Piston rod 16 of the cylinder 17 which can be pressurized with compressed air engages with one Gearing into a gear 18 rotatably mounted on the slide 11, the Toothing meshes with a rack 19, which on the slide 11th horizontally movable and on which the separating wedge 3 is attached.
  • Figure 3 is the one-piece design of the separating sword 1 on the steel belt 2 shown.
  • the separating sword 1 is made by an approximately at an angle of 45 ° widening of the steel strip running at an angle to the sheet conveying direction, the length of this widening transversely to the sheet conveyance being about the sheet width, preferably the maximum sheet width, so that the at Auxiliary stack formation in the trailing edge area sheets to be supported over their entire width is supported.
  • the rest position representing the starting position 3 shows the separating sword 1 immediately to the side of the sheet stack 5, so that this is controlled by a non-stop stack change preferably pneumatic drive, which is not shown in the drawing, with a kind of cutting movement at high speed from the side between two sheets in the upper loosened area of the sheet stack and this as well the overlying sheets in the sheet conveying direction in the rear edge area for a short time supports, so that in the gap thus formed the separating wedge 3 to over The leading edge of the separating sword retracts and the bow is supported holds by suction.
  • the auxiliary stack carrier 4 inserted in a conventional manner, the Separating sword 1 withdrawn or by rotating the band 2 from the Area of the stack of sheets moved into the rest position shown in Figure 3 becomes.
  • Embodiment After triggering the non-stop stack change, it moves at the one shown Embodiment first the separating sword 1 on the bow format set device in the sheet stack and separates this sheet stack in Area of the trailing edge of the sheet. At the same time are not shown in the drawing Lowered stops for the trailing edge of the sheet, for example pivoted away, and then the separating wedge 3 moves in below the separating sword 1 and sucks it through the separating sword on the trailing edge also in the area of his Trailing edge. The separating sword then moves out of the area of the sheet stack out and at the same time the main stack is lowered. In the widened gap the auxiliary stack carrier moves in between two sheets so that the separating wedge also extends the area of the sheet stack are withdrawn against the sheet conveying direction can. After changing the main stack, the auxiliary stack is lowered to the Main stack so that the auxiliary stack carrier in its shown in the drawing Can return to the end position.
  • Two pivotable rear edge stops are also attached to the cross member 108 138a and 138b, on which the rear edge of the sheet stack 5 (FIG. 1) is aligned.
  • gripper modules at the points designated 103a and 103b arranged, which represent a holding device, with the help of the rear edge of the upper bow resting on the separating sword and for as long can be held until the auxiliary stack carrier is inserted under the sheet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Pile Receivers (AREA)
  • Discharge By Other Means (AREA)

Claims (16)

  1. Dispositif de changement non-stop de pile dans le receveur de sortie de feuilles d'une machine d'impression, comportant un support auxiliaire de pile (4) d'empilages, qui reçoit transitoirement les feuilles arrivantes et peut être inséré dans le dispositif d'entraínement des feuilles entre deux feuilles séparées l'une de l'autre au niveau de leur bord arrière, ainsi qu'un couteau de séparation (1), qui supporte pendant une brève durée la feuille supérieure parmi ces deux feuilles au niveau de son bord arrière sur toute la largeur de feuille, jusqu'à ce que le support auxiliaire de pile (4) ait atteint sa position insérée, caractérisé par
    un dispositif séparé de fixation (3;103), qui coopère avec le couteau de séparation de telle sorte qu'il bloque la feuille supérieure uniquement dans la zone du bord arrière, contre un déplacement produit par le support auxiliaire de pile (4) d'empilage.
  2. Dispositif selon la revendication 1, caractérisé en ce
    que le dispositif de fixation est un coin de séparation (3), qui peut être chargé par de l'air d'aspiration, comporte des buses d'aspiration (3a) situées au niveau de la surface supérieure en forme de coin et coopère avec le couteau de séparation (1) de telle sorte que le coin de séparation (3), qui est déplaçable dans la direction d'entraínement des feuilles, se déplace au-dessous du couteau de séparation (1) et maintient fermement par aspiration la feuille supérieure au niveau du bord arrière, jusqu'à ce que le support auxiliaire de pile (4) ait été introduit.
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce
    que le couteau de séparation (1) est fixé sur une bande circonférentielle (2) pouvant être entraínée et est supporté avec cette bande dans un chariot (11) qui est guidé de manière à être déplaçable dans la direction d'entraínement des feuilles.
  4. Dispositif selon les revendications 1 à 3, caractérisé en ce
    que le couteau de séparation (1) est formé par une partie élargie, qui s'étend obliquement par rapport à la direction d'entraínement des feuilles, d'une bande souple, notamment d'une bande d'acier (2), et est recouvert par une matière plastique, notamment du polytétrafluoroéthylène.
  5. Dispositif selon l'une des revendications 3-4, caractérisé en ce
    que le chariot (11) servant à supporter la bande d'acier (2), sur laquelle est formé le couteau de séparation (1), est disposé de manière à être réglable en fonction du format.
  6. Dispositif selon la revendication 4, caractérisé en ce que
    la bande d'acier (2) pourvue du couteau de séparation (1) est guidée par des rouleaux de renvoi (6,7) montés dans le chariot (11) ou analogue dans la zone de la largeur maximale de la feuille, parallèlement au plan de la feuille et au-dessous des feuilles arrivantes.
  7. Dispositif selon les revendications 4 et 6, caractérisé en ce
    que la bande d'acier (2), qui peut être entraínée circonférentiellement et sur laquelle est formé le couteau de séparation (1), s'engage, par un rebord (9), un bourrelet ou analogue, dans une gorge de guidage (10) située sur la périphérie des rouleaux de renvoi (6,7) guidant la bande d'acier (2).
  8. Dispositif selon les revendications 6 et 7, caractérisé en ce
    que la bande d'acier (2) est guidée parallèlement au plan de la feuille au niveau de son bord arrière, dans la direction d'entraínement des feuilles, dans une traverse (8) qui s'étend sur la largeur de la feuille.
  9. Dispositif selon l'une des revendications précédentes 2-8, caractérisé en ce
    que le coin de séparation (3) possède en coupe transversale, parallèlement à la direction d'entraínement de la feuille, un profil en forme de boíte plate, qui est biseauté au niveau du côté supérieur situé en avant dans la direction d'avance et possède, au niveau de ce biseau, des buses d'aspiration (3a) qui sont raccordées au moyen de l'espace intérieur du profil de boíte à une source d'air d'aspiration, de préférence au système d'air d'aspiration de la machine d'impression.
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce
    que des unités pneumatiques à piston-cylindre sont prévues pour l'entraínement du couteau de séparation (1) et pour l'entraínement du coin de séparation (3).
  11. Dispositif selon l'une ou plusieurs des revendications précédentes, caractérisé en ce
    que la butée de bord arrière (138a,b) pour les feuilles dans la pile de feuilles est disposée de manière à pouvoir être abaissée ou de manière à pouvoir pivoter.
  12. Dispositif selon la revendication 1, caractérisé en ce
    que le dispositif de fixation comprend un ou plusieurs organes de saisie (103a,103b), qui coopèrent avec le couteau de séparation (1) de telle sorte que le ou les éléments de saisie (103a,b) saisissent la feuille supérieure au niveau du bord arrière et la retiennent jusqu'à ce que le support auxiliaire de pile (4) soit rentré.
  13. Dispositif selon la revendication 12, caractérisé en ce
    que le ou les éléments de saisie (103a,103b) sont déplaçables dans la direction d'entraínement des feuilles.
  14. Dispositif selon la revendication 12, caractérisé en ce que
    le ou les éléments de saisie (103a,103b) saisissent et retiennent la feuille supérieure ou éventuellement d'autres feuilles disposées sur la feuille supérieure.
  15. Dispositif selon la revendication 12, caractérisé en ce
    que le ou les organes de saisie enserrent, par leurs mâchoires de saisie ouvertes (113,114), la bande de séparation (2) ou le couteau de séparation (1) et serrent la feuille supérieure et éventuellement d'autres feuilles disposées sur la feuille supérieure, contre la bande de séparation (2) ou le couteau de séparation (1).
  16. Dispositif selon la revendication 13, caractérisé en ce
       qu'au moins l'une des mâchoires (114) de l'organe ou des organes de saisie (103a,b) est maintenue ouverte par la force d'un ressort (116) et comporte un biseau (117) qui coopère avec une butée (118) de telle sorte que la mâchoire de saisie (114) se ferme lorsqu'il rencontre la butée (118).
EP96117493A 1995-11-09 1996-10-31 Dispositif pour faire des piles auxiliaires pendant l'échange en continue de piles dans un empileur d'une machine à imprimer Expired - Lifetime EP0773179B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19541792 1995-11-09
DE19541792A DE19541792B4 (de) 1995-11-09 1995-11-09 Einrichtung zur Hilfsstapelbildung beim Nonstopstapelwechsel im Ausleger einer Druckmaschine

Publications (3)

Publication Number Publication Date
EP0773179A2 EP0773179A2 (fr) 1997-05-14
EP0773179A3 EP0773179A3 (fr) 1997-10-01
EP0773179B1 true EP0773179B1 (fr) 2001-05-30

Family

ID=7777028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117493A Expired - Lifetime EP0773179B1 (fr) 1995-11-09 1996-10-31 Dispositif pour faire des piles auxiliaires pendant l'échange en continue de piles dans un empileur d'une machine à imprimer

Country Status (4)

Country Link
US (1) US5915688A (fr)
EP (1) EP0773179B1 (fr)
JP (1) JP3816997B2 (fr)
DE (2) DE19541792B4 (fr)

Families Citing this family (13)

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DE19612293C2 (de) * 1996-03-28 1998-10-08 Heidelberger Druckmasch Ag Einrichtung zur automatischen Formateinstellung im Ausleger einer Rotationsdruckmaschine
DE59810407D1 (de) * 1998-07-21 2004-01-22 Gerhard Kurt Einrichtung zur Bildung einer Lücke
DE19928367A1 (de) 1999-06-21 2000-12-28 Will E C H Gmbh & Co Verfahren und Vorrichtung zum Wechseln von Paletten für Bogenstapel
DE10000512B4 (de) * 2000-01-08 2006-03-09 Koenig & Bauer Ag Einrichtung an kontinuierlich arbeitenden Bogenanlegern
JP4227824B2 (ja) * 2003-03-28 2009-02-18 三菱重工業株式会社 枚葉印刷機の排紙装置
US7021617B2 (en) * 2003-12-22 2006-04-04 Xerox Corporation Clamp actuator system and method of use
DE102005046685A1 (de) * 2005-09-29 2007-04-05 Heidelberger Druckmaschinen Ag Bogenleiteinrichtung für Bogenanleger
US7900904B2 (en) 2007-04-30 2011-03-08 Xerox Corporation Modular finishing assembly with function separation
DE102009046590A1 (de) 2009-11-10 2011-05-12 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Bildung von Stapeln aus Beuteln
DE102012021268B4 (de) 2011-11-25 2023-10-05 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zur Bildung eines Hilfsstapels
DE102015217170B4 (de) 2014-09-17 2023-10-05 Heidelberger Druckmaschinen Ag Vorrichtung zur Vereinigung eines Hilfsstapels mit einem Hauptstapel
DE102020123987A1 (de) 2020-09-15 2022-03-17 Koenig & Bauer Ag Auslage für eine bogenverarbeitende Maschine und Verfahren zum Ablegen von Bogen in einer Auslage
DE102020123986A1 (de) 2020-09-15 2022-03-17 Koenig & Bauer Ag Auslage für eine bogenverarbeitende Maschine und Verfahren zum Ablegen von Bogen in einer Auslage

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DE1231721B (de) 1966-04-30 1967-01-05 Maschf Augsburg Nuernberg Ag Zwischenstapelvorrichtung an einer bogenverarbeitenden Maschine
DE2441459B2 (de) * 1974-08-29 1976-07-01 Roland-Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Vorrichtung zum voruebergehenden auffangen und festhalten eines auf einem stapel abzulegenden bogens
US4359218A (en) * 1980-06-23 1982-11-16 Beloit Corporation Continuous sheet collection and discharge system
DE3028865C2 (de) 1980-07-30 1983-12-01 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zwischenstapeleinrichtung für Non-Stop-Stapelwechsel in Auslegern von Druckmaschinen
DE3114414C2 (de) * 1981-04-09 1984-08-09 Jagenberg-Werke AG, 4000 Düsseldorf Vorrichtung zum Stapeln von Bögen
DE3413597A1 (de) * 1984-04-11 1985-10-24 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum ablegen von in einem bogenfluss transportierten bogen in einem stapel
DE3616470A1 (de) * 1985-12-17 1987-06-25 Jagenberg Ag Verfahren und vorrichtung zum ablegen kontinuierlich zu einer stapelstelle gefoerderter bogen
DE3739194A1 (de) * 1987-11-19 1989-06-01 Jagenberg Ag Vorrichtung zum abstapeln von boegen
DE4011286A1 (de) * 1990-04-06 1991-10-17 Heidelberger Druckmasch Ag Bogenausleger fuer druckmaschinen oder dergleichen
DE4021676C1 (fr) * 1990-07-07 1991-11-21 Hilmar 5653 Leichlingen De Vits
DE4217816C2 (de) * 1992-05-29 1995-01-26 Heidelberger Druckmasch Ag Einrichtung zur kontinuierlichen Auslage flächiger Druckprodukte
DE4221928B4 (de) 1992-07-03 2004-06-24 Heidelberger Druckmaschinen Ag Vorrichtung zum Non-Stop-Stapelwechsel im Ausleger einer Druckmaschine
DE4317357C1 (de) * 1993-05-25 1994-11-24 Roland Man Druckmasch Verfahren und Vorrichtung zur exakten Trennung eines Hilfsstapels von einem Hauptstapel bei Non-Stop-Auslegern von bogenverarbeitenden Druckmaschinen

Also Published As

Publication number Publication date
DE59606994D1 (de) 2001-07-05
EP0773179A2 (fr) 1997-05-14
JPH09169465A (ja) 1997-06-30
US5915688A (en) 1999-06-29
JP3816997B2 (ja) 2006-08-30
DE19541792B4 (de) 2004-09-30
DE19541792A1 (de) 1997-05-15
EP0773179A3 (fr) 1997-10-01

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