EP0706882B1 - Tambour de transfert de feuilles pour une machine d'impression - Google Patents

Tambour de transfert de feuilles pour une machine d'impression Download PDF

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Publication number
EP0706882B1
EP0706882B1 EP95116073A EP95116073A EP0706882B1 EP 0706882 B1 EP0706882 B1 EP 0706882B1 EP 95116073 A EP95116073 A EP 95116073A EP 95116073 A EP95116073 A EP 95116073A EP 0706882 B1 EP0706882 B1 EP 0706882B1
Authority
EP
European Patent Office
Prior art keywords
sheet guiding
sheet
blowing device
arrangement according
drum
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
EP95116073A
Other languages
German (de)
English (en)
Other versions
EP0706882A1 (fr
EP0706882B2 (fr
Inventor
Karlheinz Sellmann
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=6530903&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0706882(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 EP0706882A1 publication Critical patent/EP0706882A1/fr
Publication of EP0706882B1 publication Critical patent/EP0706882B1/fr
Application granted granted Critical
Publication of EP0706882B2 publication Critical patent/EP0706882B2/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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/102—Combinations of transfer drums and grippers with pneumatic means

Definitions

  • the invention relates to a sheet-guiding drum arrangement for a printing press, provided with at least one gripper bridge, which enables the contact-free sheet transport within the printing press, preferably between the printing units or their further processing units, e.g. Painting works, serves.
  • a device of this type is known from DE-AS 1 102 767. Then one or two (in the case of a double-sized drum with two sheet-bearing lateral surfaces) gripper bridges are arranged on a sheet-guiding drum.
  • the gripper bar is designed with a rectangular cross-section and causes a uniform vacuum between the sheet and the associated sheet guiding device (envelope body) when rotating. The gripper bar sucks some of the air from the sheet guide, so that the sheet is pressed against the sheet guide by the normal air pressure from the inside of the sheet.
  • the disadvantage here is that the sheet is pressed against the sheet guiding device as a result of the normal air pressure. If the side facing the sheet guiding device is printed, this leads to impairments in the print quality (the sheet smears off).
  • Another disadvantage is that after the sheet has been transferred from the sheet-guiding drum to the next printing cylinder, the rear area of the sheet can no longer be guided on the sheet guiding device as a result of the reduced vacuum, i.e. the bow lifts off.
  • a further drum is known from EP 0 230 032 B1, which has guiding surfaces which are essentially secant between at least two gripper bridges within the drum circumference owns.
  • the guiding surfaces are intended to serve as air scoops, which generate an air jam in printing operation, which keeps the respective sheet with the printed surface away from the guiding surfaces and thus should ensure lubrication-free and guillotine-free sheet guidance.
  • the guide surfaces can also implement the sheet guidance with a sheet guiding device arranged outside the lateral surface of the drum.
  • the guide surfaces which can also be formed by guide plates, serve to guide the trailing edge of the sheet when the sheet is transferred to the subsequent printing cylinder.
  • a disadvantage of these designs is that the drum has a high mass due to its design. In printing operation, depending on the number of gripper bars, centrifugal forces occur which have a negative effect on the registration. Furthermore, the desired dynamic pressure is dependent on the machine speed and is therefore subject to fluctuations.
  • a rotary printing press with a transfer body arranged between two printing units is known, which is preferably suitable for sheet metal printing.
  • This transfer body has two conical support disks or stops on a shaft for guiding the sheets on the side edges or the rear edge.
  • Continuous gripper bridges, which are supported with their side surfaces on the shaft, are arranged concentrically around the support disks / stops.
  • a sheet guiding device is known in the delivery drum area.
  • the sheets are removed from a printing cylinder by a rapier system, which are arranged on endless chains, passed around a chain wheel and fed to the delivery stack.
  • a fixed blowing device is arranged within the circumference of the chain wheels, which influences the sheet travel outwards against the sheet guide path by means of blowing air.
  • the disadvantage here is that the sheet is guided with the printed side against the blowing device and thus the print quality can be impaired.
  • a transfer drum for drying sheets printed on one side is known.
  • the transfer drum has an outer surface made of perforated sheet metal or similar mesh.
  • a first channel for supplying warm air and a second channel for supplying cold air are arranged inside the transfer drum in the direction of sheet travel.
  • the air is directed to the inner surface of the jacket by means of pipes and exits from the pipe openings and the openings in the perforated sheet.
  • the sheet is to be conveyed while floating on the drum circumference and can be partially pressed against an adjacent sheet guide.
  • a blow air drum with an adjacent sheet guide, in the form of a blow plate is known.
  • the blown air drum has drum caps that rotate together with the bows in the gripper closure.
  • the drum caps have blowing nozzles which are intended to build up an air cushion between the outer surface of the blowing air drum and the underside of the bend. The radial position of the drum caps can be adjusted.
  • the object of the invention is to provide a sheet-guiding drum body with low mass, which allows contactless sheet transport, in particular for sheets printed on both sides.
  • the drum body ensures non-contact sheet transport from a printing cylinder to a downstream printing cylinder or a downstream drum.
  • the sheet (except for the front edge fixed in the gripper closure) is guided freely on an air cushion.
  • the blower is flowed approximately perpendicularly on both sides by the blowing device and the sheet guiding device, so that a contactless Arch guidance is achieved.
  • the inflow takes place with approximately the same pressure conditions, so that there is no negative pressure which has a negative effect on the sheet guide.
  • the blowing device of the drum body preferably comprises a circular sector which is approximately formed by the transfer area of the upstream cylinder and the transfer area of the downstream cylinder / drum.
  • the blowing device can comprise a larger circular sector, for example if the freshly printed or lacquered sheet is to be guided on the upstream printing cylinder for as long as possible.
  • at least one separate air outlet opening is additionally provided within the blowing device, the air flow of which is directed approximately tangentially to the upstream pressure cylinder. In a further embodiment, this can also be achieved by a fixed blowpipe, the air flow of which is also directed tangentially to the upstream pressure cylinder.
  • the invention is suitable for drum bodies with one, two, three or four gripper bridges arranged symmetrically on the circumference.
  • a sheet-guiding drum body 4 is arranged downstream of a printing cylinder 2 of the preceding printing unit in an offset rotary printing press, and the drum body 4 is a sheet guiding cylinder 13 downstream of a drying unit.
  • the impression cylinder 2 is operatively connected to a blanket cylinder 3.
  • the blanket cylinder 3 can, for example, also be a forme cylinder of a coating unit.
  • a sheet guide cylinder 1 is arranged upstream of the impression cylinder 2 in the direction of sheet travel.
  • the drum body 4 (according to FIGS. 1 and 2), based on a single-sized pressure cylinder, is designed with a double-sized diameter and thus carries two gripper bridges 6, 7.
  • each gripper bridge 6 or 7 consists of a gripper shaft, grippers and at least one gripper bar.
  • the gripper bar supports support blocks assigned to each gripper for the individual gripper support.
  • the drum body 4 is rotatably received with its two shaft journals 15 in a mounting of a frame 14.
  • the aligned shaft journals 15 are hollow. Each pin 15 is fixed to a support disk 16, which are connected to each other by a gripper bar 18 per gripper bridge 6, 7. The complete gripper bridge 6 or 7 is fixed on the gripper bar 18.
  • the support disks 16 are designed to run essentially as a secant to form a gripper envelope circle 5.
  • an axis 8 fixed to the frame is concentrically arranged, on which two support arms 17 are fixed.
  • the support arms 17 support a blower device 9 connecting the support arms 17.
  • the blower device is assigned a plurality of fans for generating blown air.
  • the air generation can also be realized via a pneumatic system with an external air supply.
  • blow pipe 10 In order to guide a sheet 11 without smearing on the pressure cylinder 2, an air flow directed approximately tangentially against the pressure cylinder 2 is generated by a blow pipe 10, which is adjacent to the blowing device 9. The rear part of the arch is supported by an air cushion.
  • This blow pipe 10 has an external air supply.
  • the blowpipe 10 preferably has a plurality of openings arranged distributed over the cylinder width.
  • the mode of operation is as follows: the sheet 11 is transferred from the impression cylinder 2 to the gripper bridge 6 or 7 of the drum body 4. The rear part of the sheet 11 still located on the pressure cylinder 2 is supported by an air flow emerging from the blowpipe 10 so that the sheet 11 does not come into contact with the drum body 4.
  • the blowpipe 10 can also be designed so that it can be switched off, so that only the blowing device 9 takes over the sheet guidance.
  • the blowing device 9 now supports the sheet 11 by the air flow while the gripper bridge 6 or 7 with the sheet 11 moves into the sheet outlet. Blown air is applied to the sheet guiding device 12, so that air flows from both sides onto the printed sheet 11 and is guided through the sheet outlet and the subsequent sheet emergence without contact.
  • the sheet 11 is then transferred to the subsequent sheet guide cylinder 13.

Landscapes

  • 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)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Replacement Of Web Rolls (AREA)
  • Ink Jet (AREA)

Claims (8)

  1. Dispositif à tambour de guidage de feuilles pour une machine d'impression, de préférence entre des unités d'impression ou des unités de traitement supplémentaire, comportant un corps de tambour (4) comprenant au moins un pont de preneur (6,7) agencé à la périphérie, ainsi qu'un dispositif de conduction de feuilles (12) agencé de façon adjacente,
    caractérisé en ce que le corps de tambour (4) comporte des tourillons d'arbre (15) qui sont agencés frontalement et sont montés dans des bâtis latéraux (14) et deux disques porteurs (16) qui sont montés, de façon rotative, avec les tourillons d'arbre (15), de façon concentrique sur un axe (8) fixé au bâti, et sont reliés par au moins un pont de preneur périphérique (6,7), un dispositif de soufflage (9) étant fixé sur l'axe (8) à l'intérieur d'un cercle d'enveloppe de preneur (5), autour duquel les ponts de preneur (6,7) peuvent tourner et le dispositif de conduction de feuilles (12) adjacent au dispositif de soufflage (9) pouvant être alimenté pneumatiquement.
  2. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que le dispositif de soufflage (9) est couplé à des ventilateurs ou à une alimentation d'air externe.
  3. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que deux bras porteurs (17) qui sont reliés par le dispositif de soufflage (9) sont fixés sur l'axe (8).
  4. Dispositif à tambour de guidage de feuilles selon l'une des revendications 1 et 2,
    caractérisé en ce que le dispositif de soufflage (9) présente un contour externe approximativement convexe.
  5. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que le dispositif de soufflage (9) comporte de plus au moins une ouverture de sortie d'air séparée, dont le courant d'air est orienté approximativement tangentiellement à un cylindre de pression (2) agencé en amont.
  6. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce qu'un tube de soufflage (10) est adjacent au dispositif de soufflage (9), dont le courant d'air est orienté approximativement tangentiellement au cylindre de pression (2) agencé en amont.
  7. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que le dispositif de conduction de feuilles (12) peut être commuté de l'air de soufflage à l'air d'aspiration.
  8. Dispositif à tambour de guidage de feuilles selon la revendication 1,
    caractérisé en ce que les disques porteurs (16) s'étendent essentiellement comme des sécantes par rapport au cercle d'enveloppe (5).
EP95116073A 1994-10-15 1995-10-12 Tambour de transfert de feuilles pour une machine d'impression Expired - Lifetime EP0706882B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436955A DE4436955C2 (de) 1994-10-15 1994-10-15 Vorrichtung zum berührungslosen Bogentransport
DE4436955 1994-10-15

Publications (3)

Publication Number Publication Date
EP0706882A1 EP0706882A1 (fr) 1996-04-17
EP0706882B1 true EP0706882B1 (fr) 1997-12-29
EP0706882B2 EP0706882B2 (fr) 2001-01-17

Family

ID=6530903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116073A Expired - Lifetime EP0706882B2 (fr) 1994-10-15 1995-10-12 Tambour de transfert de feuilles pour une machine d'impression

Country Status (3)

Country Link
EP (1) EP0706882B2 (fr)
AT (1) ATE161473T1 (fr)
DE (2) DE4436955C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629370A1 (de) * 1996-07-20 1998-01-22 Heidelberger Druckmasch Ag Rotationsdruckmaschine mit einer Einrichtung zum Behandeln der Oberfläche von Bogen
DE19713361B4 (de) * 1997-03-29 2007-12-27 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum abschmierfreien Führen eines bedruckten Bogens auf einem bogenführenden Zylinder einer Druckmaschine, insbesondere auf einer Wendetrommel einer Bogenrotations-Offsetdruckmaschine, im Schöndruckbetrieb
ATE249384T1 (de) 1998-12-03 2003-09-15 Heidelberger Druckmasch Ag Ausleger einer bogen verarbeitenden maschine
DE10042887A1 (de) * 2000-08-31 2002-03-14 Heidelberger Druckmasch Ag Maschine zur Verarbeitung von Bogen
JP4638165B2 (ja) 2003-07-16 2011-02-23 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 枚葉紙を処理する機械
JP6384987B2 (ja) * 2014-05-22 2018-09-05 株式会社小森コーポレーション 枚葉印刷機

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE510456C (de) * 1925-08-25 1930-10-18 Albert Schnellpressen Vorrichtung zum Trocknen der bedruckten Bogen bei Mehrfarben- Rotationstiefdruckmaschinen
DE725705C (de) * 1941-01-25 1942-09-28 Willy Mailaender Rotationsgummidruckmaschine zum mehrfarbigen Bedrucken von Blechtafeln
DE1102767B (de) * 1958-08-21 1961-03-23 Miehle Goss Dexter Inc Bogentransporteinrichtung an Druckpressen
US3334897A (en) * 1965-05-25 1967-08-08 Richard E Sharkey Method and apparatus for controlling curvature in printed sheets being withdrawn from an impression cylinder
DE2017417B2 (de) * 1970-04-11 1972-07-20 Maschf Augsburg Nuernberg Ag Bogenübergabetrommel an Bogenrotationsoffsetdruckmaschinen
DE2914362C3 (de) * 1979-04-09 1984-12-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogentransporttrommel an Rotationsdruckmaschinen
DD228795A1 (de) † 1984-11-19 1985-10-23 Polygraph Leipzig Bogenleiteinrichtung im auslagetrommelbereich von druckmaschinen
DD229360A1 (de) * 1984-11-27 1985-11-06 Polygraph Leipzig Blaslufttrommel als uebergabetrommel und auslagetrommel an bogenverarbeitenden maschinen
DD242028A1 (de) † 1985-10-31 1987-01-14 Polygraph Leipzig Trockeneinrichtung in druckmaschinen
DE3602084A1 (de) * 1986-01-24 1987-07-30 Heidelberger Druckmasch Ag Bogenueberfuehrtrommel zwischen den druckwerken von rotationsdruckmaschinen
DE3717093A1 (de) † 1987-05-21 1988-12-08 Heidelberger Druckmasch Ag Bogen-rotationsdruckmaschine zur herstellung von einseitigem mehrfarbendruck oder schoen- und widerdruck
DE4244499C2 (de) * 1992-12-30 1995-04-06 Heidelberger Druckmasch Ag Druckmaschine mit bogenführender Fläche

Also Published As

Publication number Publication date
DE4436955C2 (de) 1999-11-11
DE59501163D1 (de) 1998-02-05
EP0706882A1 (fr) 1996-04-17
DE4436955A1 (de) 1996-04-18
EP0706882B2 (fr) 2001-01-17
ATE161473T1 (de) 1998-01-15

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