EP0182156B1 - Machine d'impression offset - Google Patents

Machine d'impression offset Download PDF

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Publication number
EP0182156B1
EP0182156B1 EP85113793A EP85113793A EP0182156B1 EP 0182156 B1 EP0182156 B1 EP 0182156B1 EP 85113793 A EP85113793 A EP 85113793A EP 85113793 A EP85113793 A EP 85113793A EP 0182156 B1 EP0182156 B1 EP 0182156B1
Authority
EP
European Patent Office
Prior art keywords
blanket
cylinder
rubber
web feed
feed rotary
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
EP85113793A
Other languages
German (de)
English (en)
Other versions
EP0182156A3 (en
EP0182156B2 (fr
EP0182156A2 (fr
Inventor
Detlef Dipl.-Ing. Stork
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
Albert Frankenthal AG
Koenig and Bauer Albert 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=6250019&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0182156(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Albert Frankenthal AG, Koenig and Bauer Albert AG filed Critical Albert Frankenthal AG
Publication of EP0182156A2 publication Critical patent/EP0182156A2/fr
Publication of EP0182156A3 publication Critical patent/EP0182156A3/de
Application granted granted Critical
Publication of EP0182156B1 publication Critical patent/EP0182156B1/fr
Publication of EP0182156B2 publication Critical patent/EP0182156B2/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
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines
    • 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
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a web rotary offset printing press according to the preamble of claim 1.
  • Arrangements of this type are used above all where a very slim plate cylinder with a comparatively short circumference is required.
  • cylinders of this type have only a comparatively low stability. Due to the multiple circumference of the blanket cylinder, however, the stability of the overall arrangement can be increased here in such a way that deflections and vibrations caused by the pressing forces required for printing are largely avoided.
  • the plate cylinder unwinds several times with each revolution of the rubber cylinder, so that the rubber cylinder receives the same color application several times per revolution and several copies are printed per revolution of the rubber cylinder. It has been shown that these copies do not have the same print quality.
  • the blanket cylinder with a plurality of clamping channels on the circumference and to cover it with a plurality of blankets each comprising a circumferential section assigned to a development of the plate cylinder.
  • different printing qualities result in the area of the successive peripheral sections of the blanket cylinder.
  • Another disadvantage of such an arrangement would be seen in the fact that after one of the rubber blankets has worn out, the other rubber blanket or the other rubber blankets would inevitably have to be exchanged in order to at least approximate the same conditions.
  • Another disadvantage would be the fact that in the case of several blankets, several tensioning devices would also be required. An arrangement of this kind would therefore prove to be not simple, user-friendly and reliable enough, and would therefore prove to be uneconomical.
  • a sheet-fed rotary offset printing press is known from DE-C 256 705, which indeed has a rubber cylinder which is twice the size of the plate cylinder and impression cylinder. However, this has two circumferential halves which are separated from one another by opposing cylinder pits, on each of which an associated rubber blanket, which extends over only one circumferential half, is received.
  • DE-C 29 48 489 shows a similarly constructed blanket cylinder for a sheet-fed rotary printing press, in which, in contrast to the above arrangement, a blanket is provided which extends over both circumferential halves, the ends of which are held in one cylinder pit and the middle area of which is in the other cylinder pit arranged clamping device is tensioned.
  • the tensioning device divides the rubber blanket, which is continuous over the entire cylinder circumference, into two mutually independent halves. Apart from that, the clamping device required is cumbersome and complex.
  • the known arrangement according to DE-C 29 48 489 is accordingly not suitable for eliminating the disadvantages of the generic prior art.
  • DE-C 21 51 650 shows a sheet-fed offset printing press with cylinders of the same size, at least one of which is to have a spiral circumferential contour which is to extend over the entire cylinder circumference from the front to the rear edge of the cylinder pit provided here. Such an arrangement would also not be suitable for avoiding the disadvantages of the generic prior art.
  • the contact pressure in the areas concerned is practically largely reduced, so that when these areas pass through the mutual contact area between the blanket cylinder and plate cylinder in the blanket, the same tension compensation can take place as during the passage of the Clamping channel.
  • the measures according to the invention thus advantageously result in a simulation of a tensioning channel with regard to the possibility of tension compensation in the rubber blanket, so that practically the same tension ratios in the rubber blanket can be expected each time the plate cylinder is processed on the rubber cylinder, which is advantageous for the expected print quality of the individual copies produced on the circumference of the rubber blanket. Since the tension compensation takes place here by means of measures on the rubber cylinder side, the opening cross section of the cylinder pit on the plate cylinder side can advantageously be kept as small as possible, which has an advantageous effect on paper consumption and the achievable cylinder stability.
  • the device for relieving the rubber blanket can be designed as a retraction of the circumferential contour of the steel jacket of the rubber cylinder spanned by the rubber blanket with respect to a circular contour.
  • Another advantageous embodiment of the superordinate measures can consist in that the device for relieving the rubber blanket is designed as a recess in the rubber blanket. In this case, advantageously, no change in the cylinder construction is required, so that this embodiment can also be used with existing machines.
  • a further advantageous embodiment of the superordinate measures can consist in the device for relieving the rubber blanket being designed as a recess or interruption of the pad.
  • An arrangement of this type can advantageously be produced in any printing house, since the base usually consists of cardboard which can easily be cut to size in the desired manner.
  • the double printing unit on which FIG. 1 is based consists of two adjacent rubber cylinders 1 which have the same diameter and thus the same circumference and to which an associated, slender plate cylinder 2 is attached.
  • the circumferences of the blanket cylinder 1 and plate cylinder 2 are coordinated here so that the plate cylinder 2 unwind twice on the associated blanket cylinder 1 with each revolution.
  • the plate cylinders 2 are covered with pressure plates 4 which run around their entire circumference and whose ends are suspended from a clamping device arranged in the area of a cylinder pit 5.
  • the plate tensioning device can consist, in a manner known per se, of flaps which are movably arranged in the cylinder pit 5 or simply of slots or the like which are inclined at an angle to one another.
  • the rubber cylinders 1 are each covered with a rubber blanket 6 running around their entire circumference, at the ends of which a rubber blanket tensioning device arranged in an associated tensioning channel 7 engages.
  • the Gummituchspannvor direction can consist in a conventional manner from arranged in the clamping channel 7 rotatable spindles or the like.
  • the rubber cylinders 1 each have a rubber blanket relief device 9 offset by 180 ° relative to their tensioning channel 7, when the rubber blanket 6 is relieved when it passes through the contact area between the rubber cylinder and the associated plate cylinder 2.
  • the tensioning channel 7 and the rubber blanket relief device 9 meet in the area of contact between the rubber cylinder 1 and the associated Paltten cylinder 2 with its cylinder pit 5.
  • the rubber blanket 6 is therefore relieved each time the cylinder pit 5 passes through the contact area, so that each time the plate cylinder 2 is uncoiled on the associated rubber cylinder 1, the same tension conditions are present in the rubber blanket 6, as indicated in FIG. 1 above with reference to the spiral lines 10 which illustrate the build-up of tension .
  • the build-up of tension in the blanket 6 between two relief processes can be represented by a spiral line of the type indicated at 10.
  • the spiral lines 10 each encompass half the circumference of the rubber cylinder, each starting from the tension channel 7 to the relief device 9 or starting from the latter to the tension channel 7.
  • the radially outer circumference of the rubber cylinder 1 covered with the rubber blanket 6 is so far reduced with respect to a circular contour that when the relevant peripheral section, here offset by 180 ° relative to the tensioning channel 7, passes through the contact area between the rubber cylinder 1 and assigned plate cylinder 2, the mutual contact pressure between these two cylinders is reduced to such an extent that a complete tension compensation can take place in the rubber blanket 6, regardless of the width of the opening cross section of the cylinder pit 5 on the plate cylinder side.
  • the cylinder pit 5 can therefore have a very narrow opening cross section, which is has a positive effect on paper consumption.
  • the relief device 9 can be integrated in the steel structure of the rubber cylinder 1.
  • the rubber cylinder 1 generally consists, as can be seen in FIG. 2, of a steel jacket 11 which receives the rubber blanket 6.
  • the steel jacket 11 for forming the relief device in the region offset by 180 ° from the tensioning channel 7 is provided with a groove-shaped recess 9a parallel to the tensioning channel and extending over the entire length of the cylinder, which is spanned by the rubber blanket 6.
  • the depth of the groove-shaped recess 9a can be significantly less than the depth of the tensioning channel 7.
  • a groove depth of the order of one or a few millimeters is sufficient to achieve the desired blanket relief.
  • FIG. 3 A similar construction principle is based on FIG. 3.
  • the rubber blanket 6 supported by a support 12 resting on the circumference of the steel jacket 11.
  • the underlay 12 can consist of arc-shaped cardboard.
  • the pad 12 is provided in the present case in the area opposite the tensioning channel 7 with an interruption 9b, which also ensures that the rubber blanket 6 is practically support-free in this area and therefore when passing through the contact area between the rubber cylinder 1 and assigned plate cylinder 2 can yield radially inwards so that a voltage equalization can take place.
  • the base 12 consists of two cardboard sheets which are spaced from one another in the region of the interruption 9b and are each assigned to a cylinder circumferential half and which are fixed on the cylinder side with their front end in the direction of rotation.
  • the one bow can be fixed with its front end together with the rubber sheet 6 in the region of the tension channel 7.
  • An insertion slot 13 in the steel jacket 11, which limits the interruption 9b, is assigned to the front end of the other sheet of the base 12. This ensures that when using separate sheets to form the base 12 these separate sheets cannot slip.
  • the steel jacket 11 of the rubber cylinder 1 is provided with a circumferential flattening 9c offset in the desired manner in relation to the tensioning channel 7 in order to form the relief device.
  • the circumferential flattening is so deep that when it passes through the mutual contact area between the blanket cylinder 1 and the associated plate cylinder 2, the mutual pressure decreases to such an extent that a complete tension compensation can take place in the blanket 6.
  • the flattened portion 9c can be ground or milled.
  • the relief device itself is moved into the area of the rubber blanket 6.
  • the rubber blanket 6 is provided with a circumferential recess 9d.
  • the depth of the recess 9d only comprises the compressible area of the rubber blanket 6.
  • the fabric 14 provided in the area of the lower base layer remains unaffected by this, which has an advantageous effect on the achievable load-bearing capacity.
  • the edges of the recess 9d are appropriately slightly rounded.
  • the side flanks 15 of the recess 9d are inclined with respect to one another in a V-shape.
  • the groove-shaped recess 9a according to FIG. 2 or strip-shaped interruption 9b according to FIG. 3 or flattening 9c according to FIG. 4 or recess 9d according to FIG. 5 provided to form the relief device 9 are each arranged parallel to the tensioning channel 7 and extend over the entire cylinder length.
  • the width and depth can correspond to the width and depth of the tensioning channel 7. As a rule, however, one can get by with a smaller width and depth in order to simulate a tension channel with regard to the tension conditions in the rubber blanket 6 and thus bring about a tension compensation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)

Claims (9)

1. Machine pour l'impression offset rotative à bobines, comportant au moins un cylindre porte-plaques (2) ayant sur sa périphérie un dispositif de fixation de plaques comprenant une cavité (5) dans le cylindre, et au moins un cylindre à blanchet (1) qui comporte sur sa périphérie un dispositif de fixation de blanchet comprenant un canal de fixation (7) et dont la circonférence utile, quand le blanchet (6) est posé, correspond à un multiple entier de la circonférence utile du cylindre porte-plaques (2) équipé de plaques d'impression, caractérisée en ce que la surface périphérique du blanchet (6) est en retrait par rapport au profil circulaire dans chaque zone se trouvant, par rapport au canal de fixation (7) du cylindre à blanchet (1) équipé d'un seul blanchet en caoutchouc qui est continu et tendu sans subdivision, à une distance égale à la circonférence du cylindre porte-plaques ou à un multiple entier de celle-ci.
2. Machine selon la revendication 1, caractérisée en ce que le profil circonférentiel du manteau en acier (11) du cylindre à blanchet (1) comporte au moins une zone située en retrait par rapport à un profil circulaire et traversée par le blanchet (6).
3. Machine selon la revendication 2, caractérisée en ce que le manteau en acier (11) du cylindre à blanchet (1) comporte au moins un creux (9a) en forme de rainure.
4. Machine selon la revendication 2, caractérisée en ce que le manteau en acier (11) du cylindre à blanchet (1) comporte au moins un méplat (9c).
5. Machine selon la revendication 1, caractérisée en ce que le blanchet (6) comporte au moins un creux (9d).
6. Machine selon la revendication 5, caractérisée en ce que le creux (9d) du blanchet (6) est prévu dans une partie radialement extérieure et compressible du blanchet (6).
7. Machine selon l'une des revendications 5 à 6, caractérisée en ce que les flancs (15) du creux (9d) du blanchet (6) sont inclinés en V l'un par rapport à l'autre.
8. Machine selon la revendication 1, caractérisée en ce qu' un support intermédiaire (12) s'étendant sous le blanchet (6) comporte au moins une interruption.
9. Machine selon la revendication 8, caractérisée en ce que le support intermédiaire (12) est formé de plusieurs tronçons qui présentent un écartement mutuel en direction circonférentielle et dont le bord avant est fixé dans le canal de fixation (7) ou dans une fente d'insertion (13) qui délimite l'interruption correspondante (9b).
EP85113793A 1984-11-10 1985-10-30 Machine d'impression offset Expired - Lifetime EP0182156B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3441175 1984-11-10
DE19843441175 DE3441175A1 (de) 1984-11-10 1984-11-10 Offsetdruckmaschine

Publications (4)

Publication Number Publication Date
EP0182156A2 EP0182156A2 (fr) 1986-05-28
EP0182156A3 EP0182156A3 (en) 1988-01-20
EP0182156B1 true EP0182156B1 (fr) 1991-04-03
EP0182156B2 EP0182156B2 (fr) 1996-07-03

Family

ID=6250019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113793A Expired - Lifetime EP0182156B2 (fr) 1984-11-10 1985-10-30 Machine d'impression offset

Country Status (2)

Country Link
EP (1) EP0182156B2 (fr)
DE (2) DE3441175A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005058601A2 (fr) 2003-12-16 2005-06-30 Koenig & Bauer Aktiengesellschaft Blanchet a plaque support indeformable, procede de production d'un tel blanchet et mecanisme d'impression pour machine a imprimer sans dispositif de mouillage
DE102004011882A1 (de) * 2003-12-16 2005-07-21 Koenig & Bauer Ag Druckwerk für eine Druckmaschine ohne Feuchtwerk sowie Drucktuch
DE102006027142B3 (de) * 2006-06-12 2007-05-24 Koenig & Bauer Ag Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006044979A1 (de) * 2006-09-23 2008-04-10 Man Roland Druckmaschinen Ag Druckwerk einer Druckmaschine
DE102013107995A1 (de) * 2013-07-26 2015-01-29 Manroland Web Systems Gmbh Druckwerk und Kontaktstruktur für ein Druckwerk
DE102007010481B4 (de) 2007-03-03 2018-12-20 Koenig & Bauer Ag Bogenrotationsdruckmaschine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19958133C2 (de) * 1999-12-02 2003-03-06 Koenig & Bauer Ag Druckeinheit
DE10016409B4 (de) * 1999-12-02 2007-03-15 Koenig & Bauer Ag Druckeinheit einer Rotationsdruckmaschine
EP0194617B1 (fr) * 1985-03-14 1990-08-29 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Elément d'impression pour une rotative offset
DE19740475A1 (de) * 1997-09-15 1999-03-18 Roland Man Druckmasch Druckende Zylinder in einer Rollenrotationsdruckmaschine mit zueinander versetzten Spannkanälen
DE19803809A1 (de) * 1998-01-31 1999-08-05 Roland Man Druckmasch Offsetdruckwerk
DE10066162B4 (de) * 1999-12-02 2004-08-19 Koenig & Bauer Ag Druckwerk einer Rotationsdruckmaschine
DE20023414U1 (de) 1999-12-02 2004-02-26 Koenig & Bauer Ag Übertragungszylinder einer Rotationsdruckmaschine
EP1378351B1 (fr) * 2001-04-09 2009-06-17 Koenig & Bauer Aktiengesellschaft Groupe d'impression d'une machine d'imprimerie comportant un cylindre de transfert pivotant
DE10250690B4 (de) * 2002-10-31 2006-03-02 Koenig & Bauer Ag Rotationskörper einer Druckmaschine mit einem Ballen
WO2005047011A1 (fr) 2003-11-10 2005-05-26 Day International, Inc. Structure de blanchet d'impression et procede de fabrication dudit blanchet
DE102005005302A1 (de) * 2005-02-04 2006-08-10 Koenig & Bauer Ag Druckwerk einer Druckmaschine
DE102006010551A1 (de) * 2006-03-07 2007-09-13 Maschinenfabrik Wifag Entlastungselement
US8515475B2 (en) * 2010-03-17 2013-08-20 Htc Corporation Apparatuses and methods for handling network initiated connection release procedures
JP6410617B2 (ja) * 2015-01-19 2018-10-24 西研グラフィックス株式会社 ブランケット胴の製造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE256705C (fr) *
US3395638A (en) * 1965-08-13 1968-08-06 Miehle Goss Dexter Inc Impression cylinder construction to prevent streaking in letterpress
DE2103711A1 (de) * 1971-01-27 1972-08-17 Schnellpressenfabrik Koenig & Bauer AG, 8700 Würzburg Zurichtung für Gummizylinder
IT966154B (it) * 1971-10-16 1974-02-11 Maschf Augsburg Nuernberg Ag Perfezionamento nelle macchine da stampa offset
JPS5299106A (en) * 1976-02-16 1977-08-19 Jiyuichi Inaba Method of and apparatus for offset printing continuous unit patterns on continuous sheet
DE2948489C2 (de) * 1979-12-01 1982-08-26 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Gummizylinder für eine Bogen-Offsetdruckmaschine
DE3203879C2 (de) * 1982-02-05 1984-10-31 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Bogen-Offset-Rotationsdruckmaschine
DE3315506A1 (de) * 1983-04-28 1984-10-31 Siegfried Dipl.-Ing. Geiger (FH), 8039 Puchheim Offset-tuch fuer den offset-zylinder des druckwerks einer offset-druckmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005058601A2 (fr) 2003-12-16 2005-06-30 Koenig & Bauer Aktiengesellschaft Blanchet a plaque support indeformable, procede de production d'un tel blanchet et mecanisme d'impression pour machine a imprimer sans dispositif de mouillage
DE102004011882A1 (de) * 2003-12-16 2005-07-21 Koenig & Bauer Ag Druckwerk für eine Druckmaschine ohne Feuchtwerk sowie Drucktuch
US7533608B2 (en) 2003-12-16 2009-05-19 Koenig & Bauer Aktiengesellschaft Printing blanket having a dimensionally stable carrier plate, a method for producing a printing blanket of this type, and a printing unit for a printing machine without a damping unit
DE102006027142B3 (de) * 2006-06-12 2007-05-24 Koenig & Bauer Ag Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006044979A1 (de) * 2006-09-23 2008-04-10 Man Roland Druckmaschinen Ag Druckwerk einer Druckmaschine
DE102007010481B4 (de) 2007-03-03 2018-12-20 Koenig & Bauer Ag Bogenrotationsdruckmaschine
DE102013107995A1 (de) * 2013-07-26 2015-01-29 Manroland Web Systems Gmbh Druckwerk und Kontaktstruktur für ein Druckwerk

Also Published As

Publication number Publication date
EP0182156A3 (en) 1988-01-20
EP0182156B2 (fr) 1996-07-03
DE3441175A1 (de) 1986-05-22
EP0182156A2 (fr) 1986-05-28
DE3441175C2 (fr) 1987-01-22
DE3582401D1 (de) 1991-05-08

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