EP0699527B1 - Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative - Google Patents

Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative Download PDF

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Publication number
EP0699527B1
EP0699527B1 EP95110975A EP95110975A EP0699527B1 EP 0699527 B1 EP0699527 B1 EP 0699527B1 EP 95110975 A EP95110975 A EP 95110975A EP 95110975 A EP95110975 A EP 95110975A EP 0699527 B1 EP0699527 B1 EP 0699527B1
Authority
EP
European Patent Office
Prior art keywords
sheet
cylinder
impression cylinder
printing
impression
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
EP95110975A
Other languages
German (de)
English (en)
Other versions
EP0699527A2 (fr
EP0699527A3 (fr
Inventor
Norbert Kreuzer
Reinhard Rückert
Wolfgang Rozek
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6526503&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0699527(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0699527A2 publication Critical patent/EP0699527A2/fr
Publication of EP0699527A3 publication Critical patent/EP0699527A3/fr
Application granted granted Critical
Publication of EP0699527B1 publication Critical patent/EP0699527B1/fr
Anticipated expiration legal-status Critical
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/12—Revolving grippers, e.g. mounted on arms, frames or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/36—Article guides or smoothers, e.g. movable in operation
    • B65H5/38—Article guides or smoothers, e.g. movable in operation immovable in operation
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5125—Restoring form
    • B65H2301/51256—Removing waviness or curl, smoothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means

Definitions

  • the invention relates to a method and an apparatus for flat guidance of sheets fixed in the gripper closure on one curved surface of a printing cylinder of a rotary printing press.
  • a sheet guiding device of this type is from the DE-AS 1 102 767 known.
  • This device has one above a transfer drum in the area downstream in the direction of sheet travel Blowing device arranged in the pressure cylinder.
  • This Blowing device consists of a across the width of the transfer drum reaching and with a slot blow pipe, whose jet of air is directed at the bow.
  • the blowing device is a sheet guiding device adjacent to the transfer drum, Called envelope, assigned.
  • DE 4 039 311 C2 and DE 4 217 813 A1 Devices for smoothing sheets on the circumference of the printing cylinder after the transfer area (sheet guide cylinder / impression cylinder) and before the subsequent printing nip (impression cylinder / blanket cylinder) known. These devices work as a blowing device by they "press" the sheet onto the surface of the cylinder. By the of Printing cylinders outbound dragging the ambient air, too Called drag flow, forms between the bow and the pressure cylinder an air cushion, the size of which depends on the machine speed, the format size and the basis weight of the Depends on the substrate.
  • the blowing device acts counter to the sheet transport direction, but due to its association with the impression cylinder, it must "press out” the air cushion already located between the impression cylinder and sheet. This is more and more difficult to achieve, in particular at higher machine speeds and a lower basis weight 100 100 g / m 2 , so that the sheet in front of the printing nip shows the so-called pre-doubling.
  • This forward doubling is a clap of the undulating sheet against the blanket cylinder and can also lead to the rear sheet corners turning over.
  • a sheet guiding device is known from DE 3 411 029 C2, the one integrated in the guide surface with blown air or suction air has pressurized air nozzles.
  • DE 4 211 381 A1 is a sheet guiding device known, which has a guide plate with holes as a guide surface and below the tangent point of the transfer and impression cylinders (Transfer area) has a pneumatic system which is opposite the transfer drum a suction air flow and at the same time against the pressure cylinder directed generates a blown air jet.
  • the sheet should be in the sheet transfer area over the entire length between the bowing drum and the downstream one Printing cylinders have a smooth sheet run by the Sheet lies smoothly on the impression cylinder.
  • This lifting of the rear part of the sheet leads to doubling (preliminary doubling / clap) in the entry zone of the blanket cylinder and impression cylinder.
  • the rear sheet corners may turn over or the rear sheet end may curl up.
  • the object of the invention is that mentioned in the prior art Eliminate disadvantages by starting the sheet from the transfer area of sheet guiding cylinder and impression cylinder a flat Has guide on the impression cylinder.
  • the object is achieved by Claims 1 and 2 solved. Further training results from the subclaims. It was found that the arch is flat the transfer area is guided on the printing cylinder by the Air cushion between sheet and impression cylinder by stretching the Arc strongly reduced or evacuated against the direction of sheet travel becomes. The decurling effect of the bow straightener leaves the trailing edge of the bow lie flat on the cylinder and prevents thereby clapping.
  • Each printing unit shows in known Way a printing cylinder 1 or 2, a blanket cylinder 5 and a plate cylinder 4 on which a dampening unit and an inking unit assigned.
  • a Sheet guide cylinder 3 also called transfer drum, arranged between the printing cylinders 1 and 2 .
  • a sheet guiding device 6 arranged, which consists of two parts according to FIG. 1.
  • the Sheet guiding device 6 preferably forms a continuous one Guide surface and has air nozzles in the form of holes that with at least one flow channel are connected. The air vents can act as blowing nozzles or as suction nozzles on the sheet 16.
  • Sheet running direction 9 is below one through the sheet guide cylinder 3 and the transfer cylinder 15 formed in the printing cylinder 2
  • An arc smoothing device 8 is arranged in the arc riser.
  • the Sheet smoothing device 8 has at least one smoothing gap, the e.g. is formed by suction slots. Furthermore, the sheet smoothing device 8 directly adjacent to the impression cylinder 2 Drag flow 10 of the pressure cylinder 2 in front of the transfer area 15 to reduce.
  • the sheet smoothing device 8 therefore has one Baffle surface 7 on which the major part of the drag flow 10 is deflected in front of the transfer area 15.
  • the sheet smoothing device 8 In the direction of sheet travel 9 is the sheet smoothing device 8 at the end of the sheet guiding device 6 arranged. You can also in the upstream sheet guide 6 be integrated.
  • the sheet smoothing device 8 is a line system 11 assigned, which is connected to a suction air source is.
  • the sheet smoothing device 8 has one in its smoothing gap across the format width transverse to the sheet running direction 9 Squeegee on, the holes, slots or a continuous groove owns.
  • the sheet smoothing device 8 can also the format width at variable intervals on pressure-free zones have adjustable bow brakes.
  • the bow brakes are in the essentially as suction rolls or with a rotating conveyor belt executed.
  • the sheet 16 against his from upstream printing cylinder 1 predetermined curvature from the sheet guide cylinder 3 is adopted, depending on the curvature, Basis weight and subject of the sheet 16, in the printing mode the suction air source of the sheet smoothing device 8 is also switched off become.
  • a circular arc 12 above the transfer area 15 is the Printing cylinder 2 assigned a guide device 14, the one over the format width blowing device or a mechanical Sheet guide device (e.g. with guide rods).
  • the circular arc 12 is through the transfer area 15 and the pressure zone 13 characterized between the pressure cylinder 2 and the associated Blanket cylinder 5 is formed.
  • the invention is also suitable for a sheet-fed rotary printing press, that between the impression cylinders 1, 2 three in a row arranged sheet guide cylinder 3 has.
  • the invention The device is then assigned to the sheet guiding cylinder 3, which is arranged downstream of the impression cylinder 2 in the direction of sheet travel 9 is adjacent.
  • the operation of the device according to the invention is as follows: The one of a sheet guide cylinder 3 in the sheet running direction 9th fed sheet 16 is in the transfer area 15 to the printing cylinder 2 passed.
  • the one that extends across the entire format range Sheet smoothing device 8 causes compared to the sheet guide cylinder 3 a negative pressure in that ambient air is supplied via a line system 11 is sucked off in the suction direction (FIG. 1, arrow).
  • the bow 16 will to the sheet smoothing device 8 via the undulating curve Contour drawn.
  • a Decurle effect achieved by the pressure cylinder 2 in the gripper fixed sheet 16 stretched against the sheet running direction 9 becomes.
  • the stretching of the sheet 16 against the running direction 9 causes the sheet 16 fixed on the impression cylinder 2 on the Scope of the pressure cylinder 2 already the formation of an air cushion (between sheet 16 and impression cylinder 2) noticeably reduced.
  • the Sheet 16 is pulled tight on the impression cylinder 2 and receives an improved by the shape of the sheet smoothing device 8 Flatness, especially in the rear area of the arch 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Discharge By Other Means (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Claims (6)

  1. Procédé pour le guidage en surface de feuilles (16) fixées dans l'emprise des pinces sur une surface cintrée d'un cylindre d'impression (2) d'une machine d'impression rotative avant la zone d'impression (13) au moyen d'un dispositif de guidage (14), un cylindre de guidage de feuilles (3) étant disposé en amont du cylindre d'impression (2) dans la direction d'avance des feuilles (9), et, dans un arc de cercle (12) déterminé approximativement par la zone d'impression (13) et la zone de transition (15) du cylindre d'impression (2) et du cylindre de guidage de feuilles (3) disposé en amont, se déroulant une feuille (16) guidée de façon pneumatique ou mécanique sur le cylindre d'impression (2) dans la direction d'avance des feuilles (9) avant la zone de transition (15), ladite feuille étant étendue à l'encontre de sa direction d'avance.
  2. Dispositif pour la mise en oeuvre du procédé,
    caractérisé en ce qu'un dispositif de lissage de feuilles (8), qui est couplé à une source d'air d'aspiration, est associé à un dispositif de guidage de feuilles (14) agencé dans un arc de cercle (12) avant la zone d'impression (13) du cylindre d'impression (2) au-dessous de la zone de transition (15) du cylindre de guidage de feuilles (3) et du cylindre d'impression (2).
  3. Dispositif selon la revendication 2,
    caractérisé en ce que le dispositif de guidage (14) est un dispositif de soufflage s'étendant sur la largeur du cylindre d'impression (2) ou un dispositif de guidage mécanique.
  4. Dispositif selon la revendication 2,
    caractérisé en ce qui le dispositif de lissage de feuilles (8) présente une surface d'impact (7) sur laquelle est déviée la partie principale du courant d'entraínement (10) du cylindre d'impression (2) avant la zone de transition (15).
  5. Dispositif selon la revendication 2,
    caractérisé en ce que le dispositif de lissage de feuilles (8), pour l'impression du verso, est formé d'une pluralité de freins de feuilles, pouvant être alimentés de façon pneumatique et déplaçables transversalement à la direction d'avance des feuilles (9).
  6. Dispositif selon la revendication 2,
    caractérisé en ce que la source d'air d'aspiration du dispositif de lissage de feuilles (8) peut être coupée.
EP95110975A 1994-08-25 1995-07-13 Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative Expired - Lifetime EP0699527B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4430105A DE4430105C2 (de) 1994-08-25 1994-08-25 Verfahren und Vorrichtung zur flächigen Führung von im Greiferschluß fixierten Bogen auf einer gekrümmten Oberfläche eines Zylinders einer Roationsdruckmaschine
DE4430105 1994-08-25

Publications (3)

Publication Number Publication Date
EP0699527A2 EP0699527A2 (fr) 1996-03-06
EP0699527A3 EP0699527A3 (fr) 1996-10-09
EP0699527B1 true EP0699527B1 (fr) 1999-04-07

Family

ID=6526503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110975A Expired - Lifetime EP0699527B1 (fr) 1994-08-25 1995-07-13 Procédé et dispositif pour le guidage plat de feuilles fixées dans les pinces sur la surface courbe d'un cylindre dans une machine à imprimer rotative

Country Status (3)

Country Link
EP (1) EP0699527B1 (fr)
AT (1) ATE178531T1 (fr)
DE (2) DE4430105C2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638311B4 (de) * 1995-11-08 2005-10-27 Koenig & Bauer Ag Verfahren zum Leiten eines Bogens in Druckmaschinen mit einer Leitereinrichtung dafür
DE19623657A1 (de) * 1996-06-13 1997-12-18 Weitmann & Konrad Fa Saugvorrichtung zur Luftabsaugung im Bereich des Einlaufspaltes zwischen einer Materialbahn und einer Kühlwalze einer Rollenoffsetdruckmaschine
DE19753091A1 (de) * 1997-11-29 1999-06-02 Roland Man Druckmasch Bogenführungseinrichtung in einer Druckmaschine
DE29817879U1 (de) 1998-10-07 1998-12-17 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogenführungseinrichtung für einseitig oder beidseitig bedruckte Bogen in einer Druckmaschine
ES2218084T3 (es) * 2000-02-10 2004-11-16 Mitsubishi Heavy Industries, Ltd. Unidad de guiado de hojas en una prensa de alimentacion de hojas.
DE10119097A1 (de) * 2001-04-19 2002-10-24 Koenig & Bauer Ag Bogenleiteinrichtung in der Bogenanlage von Druckmaschinen
DE10157566B4 (de) 2001-11-23 2006-10-19 Man Roland Druckmaschinen Ag Bogenleiteinrichtung mit einer Führungsfläche in einer Druckmaschine
DE102005028838A1 (de) * 2005-06-25 2007-01-04 Man Roland Druckmaschinen Ag Bogendruckmaschine und Verfahren zum Transportieren von Druckbogen in einer Bogendruckmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217813A1 (de) * 1992-05-29 1993-12-02 Heidelberger Druckmasch Ag Vorrichtung zum Erzielen einer flächigen Anlage von Bedruckstoffen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102767B (de) * 1958-08-21 1961-03-23 Miehle Goss Dexter Inc Bogentransporteinrichtung an Druckpressen
US4060236A (en) * 1973-05-10 1977-11-29 Carstedt Howard B Automatic sheet decurler
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
DE3920730A1 (de) * 1989-06-24 1991-01-10 Heidelberger Druckmasch Ag Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine
DE4039311A1 (de) 1989-06-24 1992-06-11 Heidelberger Druckmasch Ag Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine
DE4109876C2 (de) * 1991-03-26 1996-03-14 Kba Planeta Ag Bogenglätter in Auslagen von Druckmaschinen
DE4211381C2 (de) * 1992-04-04 1997-05-07 Kba Planeta Ag Leiteinrichtung in einer Bogendruckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217813A1 (de) * 1992-05-29 1993-12-02 Heidelberger Druckmasch Ag Vorrichtung zum Erzielen einer flächigen Anlage von Bedruckstoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Lexikon des Offsetdrucks"; Band 4, Teil 1, des Lexikons der gesamten grafischen Technik; Wolfgang Walenski; Seite 48; Verlag Beruf + Schule, Itzehoe; 1993 *

Also Published As

Publication number Publication date
DE59505568D1 (de) 1999-05-12
DE4430105A1 (de) 1996-02-29
EP0699527A2 (fr) 1996-03-06
EP0699527A3 (fr) 1996-10-09
ATE178531T1 (de) 1999-04-15
DE4430105C2 (de) 1996-07-04

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