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EP0306684B1 - Dispositif pour presser une feuille contre le cylindre de contre-pression dans une presse rotative à feuilles pour l'impression en plusieurs couleurs - Google Patents

Dispositif pour presser une feuille contre le cylindre de contre-pression dans une presse rotative à feuilles pour l'impression en plusieurs couleurs Download PDF

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Publication number
EP0306684B1
EP0306684B1 EP88112090A EP88112090A EP0306684B1 EP 0306684 B1 EP0306684 B1 EP 0306684B1 EP 88112090 A EP88112090 A EP 88112090A EP 88112090 A EP88112090 A EP 88112090A EP 0306684 B1 EP0306684 B1 EP 0306684B1
Authority
EP
European Patent Office
Prior art keywords
sheet
printing
impression cylinder
fingers
blowing
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
EP88112090A
Other languages
German (de)
English (en)
Other versions
EP0306684A3 (en
EP0306684A2 (fr
Inventor
Josef Dipl.-Ing. Mathes
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
Priority to AT88112090T priority Critical patent/ATE74554T1/de
Publication of EP0306684A2 publication Critical patent/EP0306684A2/fr
Publication of EP0306684A3 publication Critical patent/EP0306684A3/de
Application granted granted Critical
Publication of EP0306684B1 publication Critical patent/EP0306684B1/fr
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
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a device according to the preamble of the first claim.
  • blowing devices work satisfactorily in straight printing. However, they are unsuitable for improving the register-containing removal of a turned sheet from the upstream printing cylinder by means of suction cups, grippers or the like arranged on the sheet reversing cylinder, or also unsuitable for enabling the wrinkle-free transfer to the subsequent printing unit of the sheet already turned.
  • a disadvantage of these devices is that the mechanical means, if there are no pressure-free corridors, always blur or impair the printed image.
  • the advantage of the invention is that the force of flowing air can be used to press a sheet onto the impression cylinder not only in face printing but also in perfecting, which was not previously possible.
  • a sheet-turning cylinder 3 is arranged between a printing cylinder 1 and printing cylinder 2 of successive printing units.
  • the diameter of this cylinder is equal to the diameter of the impression cylinders 1, 2 and twice as large as the diameter of the other cylinders.
  • two suction systems 8, 10 and two gripper systems 9, 11 are also arranged diametrically on a shaft rotatably mounted eccentrically to the axis of the sheet turning cylinder 3.
  • Fig. 1 it can be seen how the sheet 13 rests on the closed surface of the printing cylinder 1.
  • the front edge of the sheet 13 has been guided by the grippers of the gripper system 4 over the tangent point 12 and the end of the sheet has reached the tangent point.
  • Suction cups 16 of the suction system 8 suck the bow end from the surface of the printing cylinder 1 immediately before or at the tangent point 12 and the grippers of the gripper system 4 of the printing cylinder 1 release the sheet 13.
  • the suction system 8 and the gripper system 9 are swung during the further rotation of the cylinders 1, 2, 3 onto the center of the sheet turning cylinder 3 and towards one another in a known manner.
  • the bow 13 is during the further rotation of the cylinders 1, 2, 3 by the grippers of the gripper system 9 accepted. After the transfer, both systems 8, 9 are swung back into the starting position in a known manner.
  • the arch 13 is thus turned and is guided by the gripper system 9 with the trailing edge first to the subsequent tangent point. There, the sheet 13 is transferred from the gripper system 9 to the gripper system 6 of the printing cylinder 2.
  • the gripper system 6 of the printing cylinder 2 leads the turned sheet 13 to the following printing unit for printing on the back of the sheet.
  • a sheet following the sheet 13 during the printing process is in the same way by the corresponding sheet guide systems arranged diametrically to the described system, i.e. the gripper system 5 on the pressure cylinder 1, the suction system 10 and the gripper system 11 on the sheet turning cylinder 3 and the gripper system 7 on the pressure cylinder 2 through the machine.
  • a device which has a blowing finger support tube 15, which runs axially parallel above the printing cylinder 1 and extends over the entire length of the printing cylinder 1.
  • Blown fingers 14 are arranged on the blower finger support tube 15 at a distance from one another, the area with their lower air outlet surfaces 18 and air outlet openings 17 into the transfer zone up to the tangent point 12 between the suction devices 16 of the suction system 8; 10 are performed.
  • the air outlet surface 18 is adapted to the contour of the printing cylinder 1, so that there is a constant gap width.
  • the device according to the invention is lifted out of the transfer area by means of an adjusting device 19 and it can be lowered again in the case of face and back printing by means of the same device.
  • the coupling gear provided for this purpose is shown schematically in FIG. 4.
  • the adjusting device 19 each has an angled support bracket 23 which is fastened with one arm to the respective end of the blowing finger support tube 15.
  • a groove curve 24 is incorporated, which slides on a bolt 21 fixed to the frame.
  • a hand lever 25 is further articulated by means of a swivel joint 27, which has a bolt 20 fixed to the frame.
  • the device By pivoting the hand lever 25 counter-clockwise around the bolt 20 fixed to the frame, the device can be lifted from the working position perfecting together with the blowing fingers 14 into the position 14 'shown in dashed lines in Figure 2'.
  • the circular pivoting movement of the hand lever 25 is superimposed on a pushing movement.
  • the device according to the invention can be lowered back into the working position perfecting and printing in the transfer area directly to the tangent point 12.
  • the air flow indicated by arrows in FIGS. 2 and 3 is fed via an air supply pipe 29 to a block 28 which is seated on the blowing finger support pipe 15.
  • the blower finger support tube 15 is provided with an opening at this point, so that the air flow supplied can get into the blower finger support tube 15 and further via bores 32 into the cavity 31 of the blow finger 14.
  • the amount of air flow is adjustable, e.g. by a control valve (not shown in more detail) or by a throttle valve 30 interposed in the air supply pipe 29.
  • the sheet turning cylinder 3 also regularly has recesses 26 distributed over the circumference across the width of the turning cylinder in such a way that a collision with the tip of the blowing fingers 14 is avoided in the working position perfecting. If the blowing fingers 14 the gripper systems 9; 11 are to be arranged opposite one another, these gripper systems 9 and 11 must also have swung in time in the direction of the center of the sheet-turning cylinder 3 during the rotation of the drum in order to print in perfecting, ie in the Working position to avoid the collision with the blowing fingers 14. This can be achieved in a known manner by extending the corresponding curve section of the control curve. Collisions with the blower fingers 14 in straight printing are not possible, since in this operating mode of the printing press the device has to be lifted out of the transfer area beforehand by means of the adjusting device 19.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Printing Methods (AREA)
  • Screen Printers (AREA)

Claims (5)

  1. Dispositif dans une presse rotative à feuilles pour l'impression en plusieurs couleurs selon une impression recto et une impression recto-verso, le dispositif étant monté à la suite de la zone d'impression au-dessus d'un cylindre d'impression, et comportant des moyens pour appliquer une feuille contre le cylindre d'impression par l'action de la force exercée par de l'air de soufflage en écoulement,
    caractérisé en ce que des doigts de soufflage (14) sont montés de manière fixe en rotation et en étant espacés régulièrement entre-eux, sur un tube de support de doigts de soufflage (15) disposé au-dessus du cylindre d'impression (1) avec son axe parallèle à l'axe du cylindre d'impression et en s'étendant sur la totalité de la largeur de ce dernier, en ce que les doigts de soufflage (14) présentent dans leur zone inférieure pourvue d'ouvertures de sortie d'air (17), une surface de sortie d'air (18) qui est adaptée au contour extérieur du cylindre d'impression (1) et qui s'étend jusqu'au point de tangence (12) entre le cylindre d'impression (1) et un cylindre de retournement de feuille (3) qui lui succède, et en ce que les doigts de soufflage (14) sont montés, ensemble avec le tube de support de doigts de soufflage (15), sur des parties de machine fixes (20 à 22) de manière à ce qu'à l'aide d'un dispositif de déplacement (19), ils peuvent être dégagés en les éloignant du point de tangence (12) dans le cas de l'impression recto, et peuvent à nouveau être ramenés en direction du point de tangence (12) pour l'impression recto-verso.
  2. Dispositif selon la revendication 1, caractérisé en ce que les deux extrémités du tube de support de doigts de soufflage (15) sont fixées chacune sur un bras d'un étrier de support coudé (23), en ce que l'autre bras de i'étrier de support coudé (23) comporte une came en forme de rainure (24) qui est guidée sur une broche (21) fixe sur le bâti, et en ce que l'étrier de support coudé (23) comporte en son sommet, une articulation de rotation (27) qui est reliée à un levier à main (25) monté de manière pivotante sur un axe (20) fixe sur le bâti.
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que l'écoulement d'air peut être amené à l'espace creux (31) des doigts de soufflage (14), par l'intermediaire d'un tube d'alimentation on air (29) et de trous (32) dans le tube de support de doigts de soufflage (15), et en ce que l'écoulement d'air est réglable ou moyen d'un clapet d'étranglement (30), d'une soupape de régulation ou analogue, disposés dans le tube d'alimentation en air (29).
  4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'écoulement d'air vers les doigts de soufflage (14) peut être commandé par une soupape de commande.
  5. Dispositif selon les revendications 1 à 4, caractérisé en ce que sur un arbre rotatif à un tour, sont disposés deux disques de commande qui sont réglables l'un par rapport à l'autre en direction périphérique, et qui commandent l'écoulement d'air de manière à ce qu'en fonction du format de feuille, l'écoulement d'air s'effectue uniquement dans la zone allant du début à la fin de la feuille (13).
EP88112090A 1987-09-11 1988-07-27 Dispositif pour presser une feuille contre le cylindre de contre-pression dans une presse rotative à feuilles pour l'impression en plusieurs couleurs Expired - Lifetime EP0306684B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112090T ATE74554T1 (de) 1987-09-11 1988-07-27 Vorrichtung in mehrfarbenbogenrotationsdruckmaschinen zum anpressen eines bogens auf den druckzylinder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730484 1987-09-11
DE3730484 1987-09-11

Publications (3)

Publication Number Publication Date
EP0306684A2 EP0306684A2 (fr) 1989-03-15
EP0306684A3 EP0306684A3 (en) 1990-05-02
EP0306684B1 true EP0306684B1 (fr) 1992-04-08

Family

ID=6335754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112090A Expired - Lifetime EP0306684B1 (fr) 1987-09-11 1988-07-27 Dispositif pour presser une feuille contre le cylindre de contre-pression dans une presse rotative à feuilles pour l'impression en plusieurs couleurs

Country Status (7)

Country Link
US (1) US4869166A (fr)
EP (1) EP0306684B1 (fr)
JP (1) JPH0712656B2 (fr)
AT (1) ATE74554T1 (fr)
BR (1) BR8804722A (fr)
DE (1) DE3869876D1 (fr)
ES (1) ES2031187T3 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405166A2 (fr) * 1989-06-24 1991-01-02 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour déplisser les feuilles sur le cylindre d'impression dans une presse rotative à feuilles
EP0490087A1 (fr) * 1990-12-10 1992-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour déplisser les feuilles sur le cylindre d'impression dans une presse rotative à feuilles
US5156090A (en) * 1989-06-24 1992-10-20 Heidelberger Druckmaschinen Ag Device for smoothing a sheet on an impression cylinder of a sheet-fed rotary printing machine
US5398925A (en) * 1992-05-29 1995-03-21 Heidelberger Druckmaschinen Ag Device for achieving a flat contact of stocks or printing materials
DE4434778C1 (de) * 1994-09-29 1995-11-30 Roland Man Druckmasch Bogenführungsmodul für eine Wendeeinrichtung in einer für Schöndruck oder Schön- und Wiederdruck einsetzbaren Rotationsdruckmaschine
EP0705689A1 (fr) 1994-09-30 1996-04-10 MAN Roland Druckmaschinen AG Entraînement pour une machine à imprimer des feuilles en plusieurs couleurs
US5537922A (en) * 1994-05-14 1996-07-23 Heidelberger Druckmaschinen Ag Press-on device in a printing unit of a printing press
DE19516374A1 (de) * 1995-05-04 1996-11-07 Kba Planeta Ag Blaseinrichtung zur Bogenführung
EP0858889A2 (fr) * 1997-02-15 1998-08-19 MAN Roland Druckmaschinen AG Système de dépoussiérage avec un dispositif de guidage de feuilles
US6619201B1 (en) 1999-05-27 2003-09-16 Heidelberger Druckmaschinen Ag Assembly including a device for holding a sheet on a cylinder participating in a reversal of the sheet in a sheet-processing machine
DE19700370B4 (de) * 1997-01-08 2005-01-05 Koenig & Bauer Ag Blasrohr in Druckmaschinen zum taktweisen Blasen

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5183251A (en) * 1988-10-13 1993-02-02 Sardella Louis M Conveyor system and feeding sheets
DE4039311A1 (de) * 1989-06-24 1992-06-11 Heidelberger Druckmasch Ag Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine
DE4410189A1 (de) * 1994-03-24 1995-09-28 Heidelberger Druckmasch Ag Leiteinrichtung für bewegtes Bogenmatrial in Druckmaschinen
DE19514252C1 (de) * 1995-04-15 1996-08-22 Heidelberger Druckmasch Ag Bogenrotationsdruckmaschine
DE19523076C5 (de) * 1995-06-24 2007-05-16 Heidelberger Druckmasch Ag Vorrichtung zur Erzielung einer einwandfreien Auflage eines Bedruckstoffs in einer Druckmaschine
DE29607087U1 (de) * 1996-04-19 1996-07-11 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogenleiteinrichtung für einen bogenführenden Druckmaschinenzylinder
US6089156A (en) * 1997-03-21 2000-07-18 Heidelberger Druckmaschinen Aktiengesellschaft Turning device for a printing press
DE19814320C1 (de) * 1998-03-31 1999-04-01 Roland Man Druckmasch Verfahren und Vorrichtung zum Wenden eines Bogens in einer Druckmaschine
GB2344070B (en) * 1998-11-24 2000-11-01 Roland Man Druckmasch Sheet guiding unit for a printing press
JP4494577B2 (ja) * 2000-03-17 2010-06-30 株式会社小森コーポレーション 両面印刷機のシート状物案内装置
DE10033838A1 (de) * 2000-07-12 2002-01-24 Roland Man Druckmasch Einrichtung zur Bogenführung
CA2392429C (fr) * 2001-07-23 2006-10-10 Mitsubishi Heavy Industries, Ltd. Presse margee a la feuille et cylindre intermediaire pour presse margee a la feuille
DE10164255A1 (de) * 2001-12-27 2003-07-17 Heidelberger Druckmasch Ag Drei-Trommel-Wendeeinrichtung für bogenverarbeitende Maschine
DE10310690A1 (de) * 2002-04-12 2003-10-30 Heidelberger Druckmasch Ag Bogenführungseinrichtung in einer bogenverarbeitenden Maschine
DE10315193A1 (de) * 2002-04-18 2003-10-30 Heidelberger Druckmasch Ag Gegendruckzylinder in einer Wendeeinrichtung einer bogenverarbeitenden Maschine
EP1556300B1 (fr) * 2002-10-19 2008-11-05 Koenig & Bauer Aktiengesellschaft Elements de guidage de machine de production ou de traitement de bandes de matiere
DE10350621A1 (de) * 2003-10-30 2005-06-02 Koenig & Bauer Ag Bogenführungseinrichtung
DE102006060686B4 (de) * 2006-01-20 2014-10-16 Heidelberger Druckmaschinen Ag Vorrichtung zum Fördern eines Bogens durch eine drucktechnische Maschine
CN113772456A (zh) * 2021-09-23 2021-12-10 南昌印钞有限公司 一种展平装置及涂布机

Family Cites Families (18)

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US2931647A (en) * 1956-01-20 1960-04-05 Papa Paolo Sheet reversing cylinder with blowing tubes for stop-cylinder printing machines
DE1561101A1 (de) * 1966-12-27 1970-01-08 Planeta Veb Druckmasch Werke Bogenleiteinrichtung fuer Bogenfuehrungszylinder
DE2354418C3 (de) * 1973-10-31 1980-04-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenübergabetrommel für Druckmaschinen
US4122773A (en) * 1974-04-24 1978-10-31 Heidelberger Druckmaschinen Ag Change-over means for a storage drum for sheet transferral
DE2460503C3 (de) * 1974-12-20 1979-05-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Umstell- und Einstellvorrichtung einer Übergabetrommel zur Bogenüberführung
IT1040008B (it) * 1975-07-24 1979-12-20 Cigardi Omc Sa Sistema e dispositivo per il rove sciamento sequenziale dei fogli su machine da stampa offset da foglio a piu colori
DE2603483B2 (de) * 1976-01-30 1978-06-08 Reinhard Mohn Ohg, 4830 Guetersloh Verfahren zum Führen eines Bogens zum gleichzeitigen Bedrucken mit einem Schön- und Widerdruck sowie Vorrichtung zur Durchführung des Verfahrens
DE2621250C2 (de) * 1976-05-13 1982-07-22 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenabfragevorrichtung in einer Rotationsdruckmaschine
DE2807151C3 (de) * 1978-02-20 1980-10-30 M.A.N. Roland Druckmaschinen Ag, 6050 Offenbach Vorrichtung zum Spannen und Glätten eines Bogens auf einer Übergabetrommel bei einer Wendeeinrichtung einer Schön- und Widerdruckmaschine
US4579446A (en) * 1982-07-12 1986-04-01 Canon Kabushiki Kaisha Both-side recording system
EP0132857B1 (fr) * 1983-07-26 1987-12-23 De La Rue Giori S.A. Machine rotative d'impression combinée
DE3411029A1 (de) * 1984-03-24 1985-10-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum fuehren von ein- und beidseitig bedruckten bogen
DE3422443C2 (de) * 1984-06-16 1989-11-23 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Folie für bogenführende Zylinder und Trommeln in Rotations-Offsetdruckmaschinen
DD229360A1 (de) * 1984-11-27 1985-11-06 Polygraph Leipzig Blaslufttrommel als uebergabetrommel und auslagetrommel an bogenverarbeitenden maschinen
DD238357A1 (de) * 1985-06-17 1986-08-20 Polygraph Leipzig Einrichtung zur abschmierfreien bogenfuehrung in bogendruckmaschinen
DE3533081A1 (de) * 1985-09-17 1987-03-26 Roland Man Druckmasch Bogenwendevorrichtung fuer rotationsdruckmaschinen
DE3542649A1 (de) * 1985-12-03 1987-06-04 Roland Man Druckmasch Bogenwendevorrichtung fuer rotationsdruckmaschinen in reihenbauweise
DD248321A1 (de) * 1986-04-21 1987-08-05 Polygraph Leipzig Sauger in wendetrommeln von druckmaschinen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405166A3 (en) * 1989-06-24 1991-07-31 Heidelberger Druckmaschinen Aktiengesellschaft Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine
US5086698A (en) * 1989-06-24 1992-02-11 Heidelberger Druckmaschinen Ag Device for smoothing a sheet on an impression cylinder of a sheet-fed rotary printing machine
US5156090A (en) * 1989-06-24 1992-10-20 Heidelberger Druckmaschinen Ag Device for smoothing a sheet on an impression cylinder of a sheet-fed rotary printing machine
EP0405166A2 (fr) * 1989-06-24 1991-01-02 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour déplisser les feuilles sur le cylindre d'impression dans une presse rotative à feuilles
EP0490087A1 (fr) * 1990-12-10 1992-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour déplisser les feuilles sur le cylindre d'impression dans une presse rotative à feuilles
US5398925A (en) * 1992-05-29 1995-03-21 Heidelberger Druckmaschinen Ag Device for achieving a flat contact of stocks or printing materials
US5537922A (en) * 1994-05-14 1996-07-23 Heidelberger Druckmaschinen Ag Press-on device in a printing unit of a printing press
DE4434778C1 (de) * 1994-09-29 1995-11-30 Roland Man Druckmasch Bogenführungsmodul für eine Wendeeinrichtung in einer für Schöndruck oder Schön- und Wiederdruck einsetzbaren Rotationsdruckmaschine
US5598779A (en) * 1994-09-29 1997-02-04 Man Roland Druckmaschinen Ag Sheet guiding apparatus for a turning device in a rotary printing machine for face-printing and/or perfecting
EP0705689A1 (fr) 1994-09-30 1996-04-10 MAN Roland Druckmaschinen AG Entraînement pour une machine à imprimer des feuilles en plusieurs couleurs
DE19516374A1 (de) * 1995-05-04 1996-11-07 Kba Planeta Ag Blaseinrichtung zur Bogenführung
DE19516374B4 (de) * 1995-05-04 2005-08-11 Koenig & Bauer Ag Blaseinrichtung zur Bogenführung
DE19700370B4 (de) * 1997-01-08 2005-01-05 Koenig & Bauer Ag Blasrohr in Druckmaschinen zum taktweisen Blasen
EP0858889A2 (fr) * 1997-02-15 1998-08-19 MAN Roland Druckmaschinen AG Système de dépoussiérage avec un dispositif de guidage de feuilles
US6619201B1 (en) 1999-05-27 2003-09-16 Heidelberger Druckmaschinen Ag Assembly including a device for holding a sheet on a cylinder participating in a reversal of the sheet in a sheet-processing machine

Also Published As

Publication number Publication date
BR8804722A (pt) 1989-04-18
EP0306684A3 (en) 1990-05-02
ES2031187T3 (es) 1992-12-01
US4869166A (en) 1989-09-26
EP0306684A2 (fr) 1989-03-15
JPH01108044A (ja) 1989-04-25
DE3869876D1 (de) 1992-05-14
JPH0712656B2 (ja) 1995-02-15
ATE74554T1 (de) 1992-04-15

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