EP2829402A2 - Unité d'impression offset et habillage pour le blanchet - Google Patents

Unité d'impression offset et habillage pour le blanchet Download PDF

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Publication number
EP2829402A2
EP2829402A2 EP14177386.1A EP14177386A EP2829402A2 EP 2829402 A2 EP2829402 A2 EP 2829402A2 EP 14177386 A EP14177386 A EP 14177386A EP 2829402 A2 EP2829402 A2 EP 2829402A2
Authority
EP
European Patent Office
Prior art keywords
transfer cylinder
contact structure
printing
blanket
cylinder
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.)
Withdrawn
Application number
EP14177386.1A
Other languages
German (de)
English (en)
Other versions
EP2829402A3 (fr
Inventor
Michael Seidenschwang
Helmut Stuhlmiller
Hans-Peter Hartmann
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 Goss Web Systems GmbH
Original Assignee
Manroland Web Systems GmbH
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 Manroland Web Systems GmbH filed Critical Manroland Web Systems GmbH
Publication of EP2829402A2 publication Critical patent/EP2829402A2/fr
Publication of EP2829402A3 publication Critical patent/EP2829402A3/fr
Withdrawn legal-status Critical Current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
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/193—Transfer cylinders; Offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
    • 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
    • B41F7/025—Multicolour printing or perfecting on sheets or on one or more webs, in one printing unit
    • 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
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/06—Blanket structure facilitating fastening to, or location on, supports

Definitions

  • the invention relates to a printing unit according to the preamble of claim 1. Furthermore, the invention relates to a contact structure for a printing unit.
  • Fig. 1 shows a schematic view of a known from the prior art printing unit of a printing machine, namely an offset printing unit of a web press.
  • printing unit 11 includes an inking unit 11, alternatively a dampening unit 12, a forme cylinder 13 and a transfer cylinder 14.
  • On an outer periphery of the forme cylinder 13 at least one printing plate 15 is arranged.
  • printing ink and with the help of the alternative dampening 12 fountain solution can be applied to the or each positioned on the forme cylinder 13 printing form 15.
  • an ink fountain 16 From the inking unit 11, an ink fountain 16, a fountain roller 17 and a plurality of other inking rollers 18 are shown.
  • a Feuchtdosiersystem 19 and a plurality of dampening rollers 20 are shown.
  • At the periphery of the transfer cylinder 14 at least one transfer mold 23 is positioned, which can be designed as a blanket or as a blanket plate.
  • Printing ink which is applied with the aid of the inking unit 11 to the or each printing plate 15 positioned on the forme cylinder 13, can be applied to a printing substrate 21 starting from the or each printing form 15 via the or each transfer mold 23 positioned on the transfer cylinder 14.
  • the printing material 21 is printed in a printing nip 22 which is formed between the transfer cylinder 14 of the printing unit 10 shown and an adjacent transfer cylinder 14 of an adjacent printing unit.
  • the printing nip 22 for printing on the printing material 21 may alternatively be arranged between the transfer cylinder 14 of the printing unit 10 and another impression cylinder, for example a satellite cylinder. be educated.
  • the embodiment shown of inking unit 11 and dampening unit 12 is purely exemplary nature.
  • At least one transfer mold 23 is positioned on the transfer cylinder 14 of the printing unit 10, which can be designed as a blanket or as a blanket plate.
  • the invention relates to a printing unit in which at least one blanket is positioned on the transfer cylinder 14 as a transfer mold and at least one printing plate is positioned on the forme cylinder 13 as a printing forme.
  • Blankets have in contrast to blanket plates on no metallic support structure, wherein the setting of a required for ink transfer pressure via a contact structure 24 which is applied to the outer surface of the transfer cylinder 14 and thus with positioned on the transfer cylinder 14 blanket between the blanket and the transfer cylinder 14 is arranged.
  • the contact structure 24 serves not only to set defined compression ratios on the transfer cylinder 14, but also to protect the cylinder surface of the transfer cylinder 14.
  • printing problems can occur during operation.
  • Such printing problems can be caused by the fact that the printing plates are damaged by the bending or bending process at the leading end and trailing end so that the printing plates at the leading and trailing ends unintentionally tend to ink acceptance.
  • the ink taken up by the printing plates in the region of their leading and trailing ends is then unintentionally transferred to the printing substrate 22 via the or each blanket, which is positioned on the transfer cylinder 14. This then leads to an unwanted Mitdrucken plate edges of the printing plates, whereby the print quality is impaired. This is a disadvantage.
  • the present invention seeks to provide a novel printing unit of a printing press and a novel contact structure for a printing unit.
  • a printing unit changes in the circumferential direction of the transfer cylinder, the radial thickness of the contact structure.
  • the contact structure has at those peripheral portions a smaller radial thickness, at which in the printing operation leading and trailing ends of the or each pressure plate on the or each Roll off the blanket.
  • pressure conditions on the transfer cylinder can be influenced in such a way that in the region of the leading ends and trailing ends of the or each printing plate collecting printing ink can not be transferred to the respective blanket. Therefore, printing problems, namely the unwanted printing of plate edges, can be avoided.
  • the contact structure according to the invention is defined in claim 3.
  • the contact structure of a plurality of films is formed, which are applied to the transfer cylinder such that seen in the circumferential direction of the transfer cylinder a plurality of films or film sections are positioned one behind the other on the transfer cylinder, namely with formation of at least one gap between the circumferentially consecutively positioned slides or foil sections.
  • This embodiment of the contact structure is easy to prepare and can also be easily applied to the transfer cylinder.
  • a plurality of films one above the other on the transfer cylinder such that at least a plurality of radially outer films are present, which are seen forming the or each gap between them in the circumferential direction of the transfer cylinder successively positioned together on a radially inner film over which the contact structure on a transfer cylinder can be applied as a unit.
  • the contact structure is formed by a single foil which can be applied to the transfer cylinder, wherein the foil has at least one depression on one side, on which the or each blanket comes to rest.
  • This embodiment of the contact structure is easy to prepare and easy to apply to a transfer cylinder.
  • the present invention relates to a printing unit of a printing press, in particular an offset printing unit of a web-fed printing press.
  • the basic structure of such a printing unit has already been described with reference to Fig. 1 described.
  • the invention relates to a contact structure for at least one on a transfer cylinder of a printing unit to be positioned blanket.
  • FIGS. 2 and 3 show details of a first contact structure 24 according to the invention, which is to be applied to a transfer cylinder 14 of a printing unit 10 of a printing press, namely in the unwound state.
  • the contact structure 24 is formed such that it has in the mounted state on the transfer cylinder 14 in the circumferential direction of the transfer cylinder 14 has a varying thickness, namely a varying radial thickness, namely at least in such peripheral portions of the transfer cylinder 14, at which in operation leading and trailing ends of or roll each on the form cylinder 13 positioned pressure plate 15 on the or each also positioned on the transfer cylinder 14 blanket 23.
  • a color transfer of printing ink which can collect in the region of the leading and trailing ends of the or each printing plate 15, be avoided on the blanket 23 and thus on the printed material 22 to be printed.
  • the contact structure 24 is formed by a single film 25 which can be applied to the transfer cylinder 14, wherein the film 25 has at least one recess 27 on a first side 26 against which the respective blanket 23 abuts.
  • the film 25 has such a recess 27 which extends in the mounted on the transfer cylinder 14 state of the film 25 at a circumferential position of the transfer cylinder 14 in the axial direction thereof, namely at such a circumferential position at which the leading ends in the printing operation and trailing ends of the or each positioned on the forme cylinder 13 pressure plate 15 roll.
  • the leading ends and the trailing ends of the or each pressure plate 15 roll on the same circumferential position of the transfer cylinder 14 on the same, so that such a recess 27 is sufficient.
  • two printing plates are positioned one behind the other on the same, then two such depressions 27 are formed on the film 25, which are then spaced apart in the circumferential direction of the transfer cylinder 14 and are preferably diametrically opposed.
  • FIGS. 2 and 3 the contact structure 24 formed by a single film 25, wherein the in FIGS. 2 and 3 shown recess 27 is formed by the fact that in the region of the first side 26 of the film 25 is removed from the film 25 material, for example by grinding, planing or other material-removing method.
  • the film 25 has a thickness x in such areas which serve to set a color transfer surface pressure.
  • a blanket 23 to be placed on the contact structure 24 or film 25 assumes no printing ink in the region of the recess 27 the side 26 of the film 25 material removed, namely by the dimension y.
  • the recess 27, which extends in the axial direction of the transfer cylinder 14, thus has in the radial direction of the transfer cylinder 14 over the depth y.
  • the film 25 is preferably carried out self-adhesive, so that the film 25 for forming the contact structure 24 on the transfer cylinder 14 with the self-adhesive side 28 can be positioned or fixed on the surface of the transfer cylinder 14.
  • a second embodiment of a contact structure 24 according to the invention in unwound state show 4 and 5 ,
  • the contact structure 24 is formed by a plurality of films.
  • two outer films 29, 30 are applied to an inner film 32 to form a gap 31 therebetween, wherein in a state of the contact structure 24 mounted on the transfer cylinder 14, the two outer films 29, 30 are positioned one behind the other as viewed in the circumferential direction of the transfer cylinder 14, namely forming the gap 31, in which the transmission structure 24 has the reduced radial thickness.
  • the contact structure 24 formed by the foils 29, 30 and 32 can be easily applied together or as a unit on the outer circumference of the transfer cylinder 14,
  • the radially inner film 32 of the contact structure 24 on one side 33 thereof is made self-adhesive, so that accordingly the contact structure 24 with the self-adhesive side 33 of the inner film 32 applied to the surface of the transfer cylinder 14, namely glued, can be.
  • the radially inner film 32 which serves as a common carrier film for the two outer films 29, 30, over a radial thickness y.
  • the radially outer foils 29, 30 have radial thicknesses x or z, wherein these radial thicknesses x, z of the two radially outer foils 29, 30 may be different.
  • it is also possible that the two radially outer foils 29, 30 have identical thicknesses x z.
  • the two radially outer foils 29, 30, which define the gap 31, seen in the axial direction of the peripheral cylinder 14, over equal widths and in the circumferential direction of the transfer cylinder 14 seen over equal lengths.
  • FIGS. 6, 7 and 8 A further embodiment of a contact structure 24 according to the invention FIGS. 6, 7 and 8 , Also in the embodiment of Fig. 6 to 8 the contact structure 24 is formed by a plurality of films, namely by a radially inner film 34 and a radially outer film 35.
  • the radially inner film 34 has according to FIGS. 7 and 8 over a radial thickness y and the radially outer foil 35 applied to the radially inner foil 34 has a radial thickness x.
  • the contact structure 24 can be applied as a unit to the surface of the transfer cylinder 14, namely glued, become.
  • the radially outer film 35 has a peelable strip 36 which is detachable in particular after application of the contact structure 24 on the surface of the transfer cylinder 14 from the contact structure 24 by peeling, namely forming a recess 37 between then adjacent, after formation of the gap 37th adjacent film sections 38, 39 of the radially outer film 35. Then, when the contact structure 24 of Fig.
  • the film sections 38 and 39 of the radially outer film 35 are positioned in the circumferential direction of the transfer cylinder 14 successively positioned, namely under training of the gap 37 between the film sections 38 and 39, in which case a blanket which is positioned on the contact structure 24 in the areas which cover the gap 37, receives no ink due to the reduced surface pressure.
  • a contact structure 24 is thus used on a transfer cylinder 14 of a printing unit which is positioned between the cylinder surface of the transfer cylinder 14 and the or each blanket 23 positioned thereon, the contact structure 24 being provided by at least one film.
  • the contact structure 24 reduces in those areas of the transfer cylinder 14 at which the or each positioned on the same blanket 23 of trailing and leading ends of the or each positioned on the forme cylinder 13 printing plate 15, the surface pressure, so as to ensure that in Area of the leading and trailing ends of the or each printing plate 15 collecting ink is not transferred to the respective blanket 23.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP14177386.1A 2013-07-26 2014-07-17 Unité d'impression offset et habillage pour le blanchet Withdrawn EP2829402A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013107995.4A DE102013107995A1 (de) 2013-07-26 2013-07-26 Druckwerk und Kontaktstruktur für ein Druckwerk

Publications (2)

Publication Number Publication Date
EP2829402A2 true EP2829402A2 (fr) 2015-01-28
EP2829402A3 EP2829402A3 (fr) 2015-09-02

Family

ID=51211588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14177386.1A Withdrawn EP2829402A3 (fr) 2013-07-26 2014-07-17 Unité d'impression offset et habillage pour le blanchet

Country Status (2)

Country Link
EP (1) EP2829402A3 (fr)
DE (2) DE102013107995A1 (fr)

Citations (3)

* 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
DE102008004892A1 (de) 2008-01-17 2009-07-23 Manroland Ag Druckwerk einer Druckmaschine und Übertragungsform

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441175C2 (de) * 1984-11-10 1987-01-22 Albert-Frankenthal Ag, 6710 Frankenthal Gummituchzylinder für eine Offsetdruckmaschine
DE19947228A1 (de) * 1999-10-01 2001-04-05 Koenig & Bauer Ag Zylinder
ES2203575T3 (es) * 2001-11-27 2004-04-16 Printgraph Waterless S.R.L. Empaquetadura universal inferior para tejidos recubiertos de goma en los cilindros de prensa de impresion offset.
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
DE102006040388A1 (de) * 2006-08-29 2008-03-13 Maschinenfabrik Wifag Anordnung von Drucktüchern auf Druckzylindern einer Rotationsdruckmaschine
DE102006044979A1 (de) * 2006-09-23 2008-04-10 Man Roland Druckmaschinen Ag Druckwerk einer Druckmaschine
US20120325098A1 (en) * 2010-02-24 2012-12-27 Kyocera Corporation Printing blanket, manufacturing method thereof, blanket cylinder, and printing press

Patent Citations (3)

* 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
DE102008004892A1 (de) 2008-01-17 2009-07-23 Manroland Ag Druckwerk einer Druckmaschine und Übertragungsform

Also Published As

Publication number Publication date
DE202013103877U1 (de) 2013-10-18
EP2829402A3 (fr) 2015-09-02
DE102013107995A1 (de) 2015-01-29

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