EP1514683B1 - Procédé pour faire fonctionner une machine à imprimer - Google Patents

Procédé pour faire fonctionner une machine à imprimer Download PDF

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Publication number
EP1514683B1
EP1514683B1 EP04021092.4A EP04021092A EP1514683B1 EP 1514683 B1 EP1514683 B1 EP 1514683B1 EP 04021092 A EP04021092 A EP 04021092A EP 1514683 B1 EP1514683 B1 EP 1514683B1
Authority
EP
European Patent Office
Prior art keywords
foil
printing
cylinder
circumferential surface
coarse structure
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
EP04021092.4A
Other languages
German (de)
English (en)
Other versions
EP1514683A1 (fr
Inventor
Arndt Jentzsch
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer 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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1514683A1 publication Critical patent/EP1514683A1/fr
Application granted granted Critical
Publication of EP1514683B1 publication Critical patent/EP1514683B1/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
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/02—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to impression cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers

Definitions

  • the present invention relates to a method of operating a printing press comprising a plurality of printing units with printing cylinders and a sheet turning device arranged between the printing units.
  • the lateral surfaces of the sheet-guiding cylinders may come into contact with ink which has not completely dried.
  • ink which has not completely dried.
  • printing cylinders which are arranged in perfecting machines after the turning device, such contact in the production of double-sided sheet is technologically required.
  • the outer surfaces of such pressure cylinder ink repellent In order to avoid the accumulation of printing ink on the lateral surfaces of the printing cylinder, designed the outer surfaces of such pressure cylinder ink repellent. This is achieved by the use of ink-repellent materials and by the creation of special structures which repel color and facilitate the removal of the printed sheets from the impression cylinder.
  • the DE 42 07 119 A1 discloses a sheet-guiding printing cylinder shell profile for a printing cylinder in sheet-fed presses, which consists of statistically evenly distributed, forming the counter-pressure surface, arranged plane-parallel to the impression cylinder axis lines having a certain screen fineness. From the DE 199 14 136 A1 It is also known to produce on the surface of a sheet-guiding cylinder by coating with plasma an outward structure and to provide them with an organic, ink-repellent coating.
  • the printing cylinder is formed by arranging additional fastening devices in such a way that an ink-repellent film acting as a counterpressure surface can be detachably fastened to the lateral surface of the printing cylinder.
  • a printing cylinder of this type has a smooth surface. When dimensioning the circumference of the printing cylinder, the thickness of the film is taken into account.
  • Serving as elevators for printing cylinder foils are usually constructed of the same materials as the outer surfaces acting as counter-pressure surfaces of the impression cylinder of the former type and have the same structure on Raupatented.
  • a film of this kind is for example from the DE 39 31 479 A1 known. This consists of a chemically resistant, wear-resistant and incompressible carrier layer, on which a silicone coating is applied.
  • From the DE 40 36 252 A1 is a sheet-guiding film known as an elevator for a printing cylinder of rotary offset printing machines for perfecting, one surface of which is smooth and the other surface is provided with evenly distributed spherical caps and a micro-roughness compensating chromium layer.
  • Object of the present invention is, while avoiding the aforementioned disadvantages, a method for operating a perfecting press with a sheet turning device downstream pressure cylinder whose outer surface comprises a color-repellent acting RauWORK to create that allows for long periods of operation a consistent print quality without replacing the printing cylinder ,
  • the decisive advantage of the method according to the invention is that a printing press with a color-repellent cylinder in the first years of operation in a known Operated manner using the ink-repellent properties of the outer surface of the printing cylinder and can be equipped with the achievement of the wear limit in a simple manner by arranging a film for further years of operation.
  • This proves to be advantageous in particular in connection with the operation of such perfecting machines whose printing cylinder does not include means for attaching a color-guiding elevator, because a complex and associated with downtime replacement of the printing cylinder deleted.
  • a further advantage consists in that, for carrying out the method according to the invention for operating a printing press, the materials used are merely a film which is designed to repel ink in a manner known per se, and adhesion promoters. In this case, the bonding agent takes the place of the fastening device in comparison to the known solutions.
  • a preferred development of the invention provides to apply the film with the interposition of the adhesion promoter on the printing cylinder and while the printing cylinder rotates circumferentially with applied film to hire the provided for this purpose with a hard-lift blanket cylinder, so that this evenly presses the film until the primer has cured. This further improves the accuracy of applying the film, particularly to those films which are relatively rigid.
  • a thermoplastic material is preferably used.
  • compounds from the group of ethylene-vinyl acetate copolymers which have a melting range between about 130 ° and 180 ° C., which can be adjusted by adding modified waxes, have proven to be suitable.
  • the bonding agent can also be used for the repair of printing cylinders, which is associated with an intermediate dryer and thus are exposed to increased heat load. To remove the film, such a bonding agent only needs to be heated.
  • thermoplastic adhesion promoters having lower melting temperatures.
  • thermoplastic adhesion promoters it is not necessary to completely remove them when replacing a worn film with a new one, since adhesive residues, after being fused, are for attachment a new film can be used and have the same properties as newly applied adhesion promoter.
  • epoxy adhesives which cure chemically and require no heating can also be used as adhesion promoters.
  • a heating of the printing cylinder can be used here specifically to accelerate the curing process.
  • the application of the primer is done in a simple manner by brushing or spraying.
  • the accompanying drawing shows a schematic representation of a printing unit with double-sized impression cylinder. 4
  • the printing cylinder 4 together with its associated blanket cylinder 2 and the plate cylinder 1, a printing unit.
  • the printing unit is part of an otherwise not shown printing machine, which includes a plurality of printing units and a sheet turning device, which is arranged downstream of it in the sheet running direction.
  • the printing cylinder 4 carries two gripper systems, which are formed from grippers 5 and gripper mounts 6 and fix the printing material on the leading edge, while they are transported by the printing gap between the printing cylinder 4 and blanket cylinder 2.
  • the lateral surface 9 of the printing cylinder 4 has a rough structure. In the illustrated state, this structure is already worn due to the continued contact with the printing material to the extent that it does not substantiate sufficient color-repellent properties.
  • a film 7 is fixed on the lateral surface, which is smooth on its side facing the lateral surface 9 and whose side facing away from the lateral surface 9 has a color-rejecting structure.
  • the lateral surface 9 is cleaned and then an adhesion promoter 8 is sprayed onto the lateral surface 9 and / or the lower side of the film 7.
  • the pressing of the film 7 is carried out by the blanket cylinder 2, which is provided for this purpose with a hard elevator 3 and to which is turned on with applied film 7 printing cylinder 4.
  • the adjustment takes place up to a pressure of between 0.05 and 0.2 mm.
  • the printing pressure is increased in small steps until the specified values are reached, with the printing cylinder 4 making several revolutions after every change in the pressure.
  • the bonding agent 8 is evenly distributed, which hardens gradually at a constant volume and compensates for unevenness of the printing cylinder 4.
  • the blanket cylinder 2 acts with the applied hard elevator 3 as normal.
  • the thickness of the applied film 7 is less than or equal to 0.3 mm, so that the printing press can always print substrates with thicknesses in the range up to 1 mm.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)

Claims (9)

  1. Procédé de gestion d'une machine d'impression ayant plusieurs groupes d'impression avec des cylindres d'impression et une installation de retournement de feuilles entre les groupes d'impression,
    - la surface enveloppe (9) d'au moins un cylindre d'impression (4) en aval de l'installation de retournement de feuilles et dans le sens de défilement des feuilles, a une structure rugueuse ayant un effet de répulsion d'encre,
    procédé selon lequel
    on imprime des feuilles avec la machine d'impression jusqu'à ce que la structure rugueuse de la surface enveloppe (9) soit usée pour que l'effet de répulsion d'encre passe en-dessous d'un seuil prédéfini, et
    ensuite sur la surface enveloppe (9) on installe un film (7) amovible dont le côté opposé à la surface enveloppe (9) a une structure rugueuse à effet de répulsion d'encre.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'on remplace le film (7) rapporté, après traitement d'autres feuilles, par un film (7) analogue lorsque la structure rugueuse du film (7) rapporté est usée pour que son effet de répulsion d'encre passe en-dessous d'un seuil prédéfini.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    la surface enveloppe (9) du cylindre d'impression (4) et le film (7) ont la même structure rugueuse avant leur usure par le contact avec les feuilles.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le film (7) est fixé par collage à l'aide d'un adhésif (8).
  5. Procédé selon la revendication 4,
    caractérisé en ce que le film (7) est appliqué sur le cylindre d'impression (4) avec interposition d'un adhésif (8) et, pendant que le cylindre d'impression (4) tourne avec le film (7) mis en place, pour être pressé par le cylindre branché, appliqué contre et muni à cet effet d'un revêtement dur (3) jusqu'à ce que l'adhésif (8) soit durci.
  6. Procédé selon la revendication 4 ou 5,
    caractérisé en ce que
    l'adhésif (8) est une matière thermoplastique, que l'on chauffe pour fixer et pour enlever le film (7).
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    l'on utilise un film métallique.
  8. Procédé selon la revendication 7,
    caractérisé en ce que
    le film métallique a une épaisseur inférieure à 0,3 mm.
  9. Procédé selon la revendication 7,
    caractérisé en ce que
    le film (7) a une couche de support élastique et une couche fonctionnelle à structure rugueuse.
EP04021092.4A 2003-09-09 2004-09-04 Procédé pour faire fonctionner une machine à imprimer Expired - Lifetime EP1514683B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341373 2003-09-09
DE10341373 2003-09-09

Publications (2)

Publication Number Publication Date
EP1514683A1 EP1514683A1 (fr) 2005-03-16
EP1514683B1 true EP1514683B1 (fr) 2013-06-05

Family

ID=34129694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021092.4A Expired - Lifetime EP1514683B1 (fr) 2003-09-09 2004-09-04 Procédé pour faire fonctionner une machine à imprimer

Country Status (3)

Country Link
US (1) US7461595B2 (fr)
EP (1) EP1514683B1 (fr)
DE (1) DE102004043839A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016685B4 (de) 2008-05-08 2020-06-04 Heidelberger Druckmaschinen Ag Flächenförmiger, Bedruckstoff führender Aufzug für einen Transportzylinder
DE102008060557B4 (de) 2008-12-04 2018-11-22 Heidelberger Druckmaschinen Ag Verfahren zum Aufbringen eines Aufzugsblechs auf einen Druckzylinder einer Offsetdruckmaschine
DE102009009460A1 (de) 2009-02-18 2010-08-19 Manroland Ag Bogenführungszylinder mit Aufzug in einer Verarbeitungsmaschine
DE102010010142B4 (de) 2009-03-26 2022-03-17 Heidelberger Druckmaschinen Ag Bogenführungselement und Verfahren zur Herstellung eines Bogenführungselementes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931479A1 (de) * 1989-09-21 1991-04-04 Heidelberger Druckmasch Ag Bogenfuehrende folie als aufzug fuer gegendruckzylinder und bogenueberfuehrungszylinder in bogenoffsetdruckmaschinen fuer schoen- und widerdruck

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161130A (en) 1963-05-27 1964-12-15 Miller Printing Machinery Co Printing apparatus
DE2916505A1 (de) * 1979-04-24 1980-10-30 Heidelberger Druckmasch Ag Bogenfuehrende folie als aufzug fuer gegendruckzylinder
US5042384A (en) * 1990-04-30 1991-08-27 Howard W. DeMoore Anti-marking method and apparatus for use with perfector cylinders of rotary sheet-fed printing presses
DE4036252C1 (fr) 1990-11-14 1992-01-02 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
US5890430A (en) * 1990-11-14 1999-04-06 Heidelberger Druckmaschinen Ag Impression cylinder having a multiple diameter and a sheet guiding foil
DE4207119C2 (de) 1992-03-06 1999-09-02 Roland Man Druckmasch Bogenführendes Druckzylindermantelprofil
DE4323750C2 (de) * 1993-07-15 1997-03-27 Roland Man Druckmasch Offset-Druckform und Verfahren zur Herstellung einer solchen Offset-Druckform
DE19914136B4 (de) 1999-03-27 2009-02-26 Koenig & Bauer Aktiengesellschaft Oberfläche für Maschinenteile in Druckmaschinen
DE20107182U1 (de) * 2001-04-26 2001-06-28 Man Roland Druckmaschinen Ag, 63069 Offenbach Bogenführungszylinder in einer Mehrfarben-Druckmaschine
US7082873B2 (en) * 2002-02-25 2006-08-01 Printing Research, Inc. Inexpensive, wash-free integrated cover for printing press transfer cylinders

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931479A1 (de) * 1989-09-21 1991-04-04 Heidelberger Druckmasch Ag Bogenfuehrende folie als aufzug fuer gegendruckzylinder und bogenueberfuehrungszylinder in bogenoffsetdruckmaschinen fuer schoen- und widerdruck

Also Published As

Publication number Publication date
US7461595B2 (en) 2008-12-09
DE102004043839A1 (de) 2005-04-07
EP1514683A1 (fr) 2005-03-16
US20060213385A1 (en) 2006-09-28

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