EP0544126A2 - Printing machine - Google Patents

Printing machine Download PDF

Info

Publication number
EP0544126A2
EP0544126A2 EP92118823A EP92118823A EP0544126A2 EP 0544126 A2 EP0544126 A2 EP 0544126A2 EP 92118823 A EP92118823 A EP 92118823A EP 92118823 A EP92118823 A EP 92118823A EP 0544126 A2 EP0544126 A2 EP 0544126A2
Authority
EP
European Patent Office
Prior art keywords
printing machine
impression cylinder
cylinder
printing
back pressure
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Withdrawn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
EP92118823A
Other languages
German (de)
French (fr)
Other versions
EP0544126A3 (en
Inventor
Gerd Dipl.-Ing. Wockenfuss
Herbert Ing. Köhne
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0544126A2 publication Critical patent/EP0544126A2/en
Publication of EP0544126A3 publication Critical patent/EP0544126A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B41F13/18—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

Definitions

  • the invention relates to a printing press, preferably a flexographic printing press, with at least one impression cylinder and at least one printing unit with format cylinder and inking unit, the format cylinder of which can be adjusted to the impression cylinder.
  • the object of the invention is to provide a printing machine of the type specified in the introduction, in which drying of penetrated ink on the impression cylinder is excluded.
  • this object is achieved in a printing press of the generic type in that the impression cylinder in the area between the supplied and the removed web to be printed on, in which it is not wrapped by a web, a spray device for spraying on a liquid which prevents sticking of ink Release agent or solvent is assigned to the impression cylinder.
  • a liquid release agent is sprayed continuously or at intervals onto the impression cylinder, which mixes with the ink on the impression cylinder and prevents it from drying, so that the mixture of printing ink and release agent or solvent from the back the web is, as it were, sucked and taken away by a blotter.
  • the spray device provided according to the invention thus ensures that dry ink adhering to the impression cylinder need not be removed by hand or by other complex devices.
  • the spray device expediently consists of a spray tube arranged parallel to a surface line of the impression cylinder at a distance from the latter.
  • the spray tube can be covered by a hood, which essentially prevents areas other than the continuous surface of the impression cylinder from being wetted with the release agent.
  • the printing machine provided with the spraying device can only have one impression cylinder with a plurality of them which can be adjusted Have printing units.
  • Glycerin, polyethylene glycols, silicone oils or high-boiling hydrocarbons can preferably be used as release or solvent.
  • the flexographic printing press shown in the drawing has a customary known construction and has only a single impression cylinder 1, on which a total of 6 printing units with format cylinders and inking units 2 can be set.
  • the structure of the flexographic printing machine is known per se and is therefore not described in more detail here.
  • a trough-shaped hood 4 is also provided which is closed on its front sides and which points with its edges against the impression cylinder 1 and is fastened to the frame 5 of the printing press.
  • a spray tube 6 is arranged in the hood 4, through which a separating agent, for example glycerin or liquid polyethylene glycols, can be sprayed onto the surface of the impression cylinder 1.
  • a separating agent for example glycerin or liquid polyethylene glycols

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Printing Methods (AREA)

Abstract

The invention relates to a printing machine having at least one back pressure cylinder (1) and at least one printing unit with a forme cylinder and inking unit (2), whose forme cylinder can be engaged with the back pressure cylinder (1). To achieve the object of providing a printing machine of this type, in which drying of printed-through printing ink on the back pressure cylinder (1) is ruled out, a spraying device (6) is assigned to the back pressure cylinder (1), in that region between the supplied and the delivered web to be printed in which said cylinder is not wrapped by a web, for spraying a liquid separating agent or solvent onto the back pressure cylinder (1), which prevents the ink from drying on. <IMAGE>

Description

Die Erfindung betrifft eine Druckmaschine, vorzugsweise Flexodruckmaschine, mit mindestens einem Gegendruckzylinder und mindestens einem Druckwerk mit Formatzylinder und Farbwerk, dessen Formatzylinder an den Gegendruckzylinder anstellbar ist.The invention relates to a printing press, preferably a flexographic printing press, with at least one impression cylinder and at least one printing unit with format cylinder and inking unit, the format cylinder of which can be adjusted to the impression cylinder.

Insbesondere wenn mit einer Flexodruckmaschine sehr dünne oder sehr weiche Papierbahnen bedruckt werden, kann es geschehen, daß die Druckfarbe durch die Bahn durchschlägt und sich am Gegendruckzylinder ablagert. Nach längerem Betrieb trocknet die Farbe an, so daß es erforderlich ist, die angetrocknete oder anklebende Druckfarbe von Zeit zu Zeit von dem Gegendruckzylinder abzurakeln oder in sonstiger Weise zu entfernen.In particular if very thin or very soft paper webs are printed on with a flexographic printing machine, it can happen that the printing ink penetrates through the web and is deposited on the impression cylinder. After a long period of operation, the ink dries, so that it is necessary from time to time to scrape off or otherwise remove the dried or adhesive printing ink from the impression cylinder.

Bei einer in der DE-AS 21 51 185 beschriebenen Druckmaschine ist es bekannt, die an einem Gegendruckzylinder anhaftende Farbe abzubürsten und mit einem aufgetragenen, das Abschmieren der Farbe verhindernden Puder zu vermengen und abzusaugen, um sicher zu stellen, daß weder Farbe noch Puder an dem Gegendruckzylinder haften bleiben.In a printing machine described in DE-AS 21 51 185, it is known to brush off the ink adhering to an impression cylinder and to mix and vacuum with an applied powder that prevents smearing of the ink, in order to ensure that neither ink nor powder is present the impression cylinder stick.

Aufgabe der Erfindung ist es, eine Druckmaschine der eingangs angegebenen Art zu schaffen, bei der ein Antrocknen von durchgeschlagener Druckfarbe auf dem Gegendruckzylinder ausgeschlossen ist.The object of the invention is to provide a printing machine of the type specified in the introduction, in which drying of penetrated ink on the impression cylinder is excluded.

Erfindungsgemäß wird diese Aufgabe bei einer Druckmaschine der gattungsgemäßen Art dadurch gelöst, daß dem Gegendruckzylinder in dem Bereich zwischen der zugeführten und der abgeführten zu bedruckenden Bahn, in dem dieser nicht von einer Bahn umschlungen ist, eine Sprüheinrichtung zum Aufsprühen eines das Ankleben von Farbe verhindernden flüssigen Trenn- oder Lösemittels auf den Gegendruckzylinder zugeordnet ist. Mit dem erfindungsgemäß vorgesehenen Trenn- oder Lösemittel wird ständig oder in Intervallen ein flüssiges Trennmittel auf den Gegendruckzylinder aufgesprüht, daß sich mit der auf dem Gegendruckzylinder befindlichen Farbe vermischt und deren Antrocknen verhindert, so daß das Gemisch aus Druckfarbe und Trenn- oder Lösemittel von der Rückseite der Bahn gleichsam wie durch ein Löschblatt abgesogen und mitgenommen wird. Durch die erfindungsgemäß vorgesehene Sprüheinrichtung ist somit sichergestellt, daß weder von Hand noch über andere aufwendige Vorrichtungen an den Gegendruckzylinder anhaftende trockene Farbe entfernt werden muß.According to the invention, this object is achieved in a printing press of the generic type in that the impression cylinder in the area between the supplied and the removed web to be printed on, in which it is not wrapped by a web, a spray device for spraying on a liquid which prevents sticking of ink Release agent or solvent is assigned to the impression cylinder. With the release agent or solvent provided according to the invention, a liquid release agent is sprayed continuously or at intervals onto the impression cylinder, which mixes with the ink on the impression cylinder and prevents it from drying, so that the mixture of printing ink and release agent or solvent from the back the web is, as it were, sucked and taken away by a blotter. The spray device provided according to the invention thus ensures that dry ink adhering to the impression cylinder need not be removed by hand or by other complex devices.

Zweckmäßigerweise besteht die Sprüheinrichtung aus einem parallel zu einer Mantellinie des Gegendruckzylinders im Abstand von diesem angeordneten Sprührohr.The spray device expediently consists of a spray tube arranged parallel to a surface line of the impression cylinder at a distance from the latter.

Das Sprührohr kann durch eine Haube abgedeckt sein, die im wesentlichen verhindert, daß andere Bereiche als die durchlaufende Oberfläche des Gegendruckzylinders mit dem Trennmittel benetzt werden.The spray tube can be covered by a hood, which essentially prevents areas other than the continuous surface of the impression cylinder from being wetted with the release agent.

Die mit der Sprüheinrichtung versehene Druckmaschine kann nur einen Gegendruckzylinder mit mehreren an diesen anstellbaren Druckwerken aufweisen.The printing machine provided with the spraying device can only have one impression cylinder with a plurality of them which can be adjusted Have printing units.

Als Trenn- oder Lösemittel können vorzugsweise Glyzerin, Polyäthylen-Glykole, Silikon-Öle oder hochsiedende Kohlenwasserstoffe verwendet werden.Glycerin, polyethylene glycols, silicone oils or high-boiling hydrocarbons can preferably be used as release or solvent.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung, in deren einziger Figur eine schematische Seitenansicht einer Flexodruckmaschine dargestellt ist, näher erläutert.An embodiment of the invention is explained below with reference to the drawing, in the single figure of which a schematic side view of a flexographic printing machine is shown.

Die in der Zeichnung dargestellte Flexodruckmaschine weist einen üblichen bekannten Aufbau auf und besitzt nur einen einzigen Gegendruckzylinder 1, an den insgesamt 6 Druckwerke mit Formatzylinder und Farbwerken 2 anstellbar sind. Der Aufbau der Flexodruckmaschine ist an sich bekannt und wird daher hier nicht näher beschrieben.The flexographic printing press shown in the drawing has a customary known construction and has only a single impression cylinder 1, on which a total of 6 printing units with format cylinders and inking units 2 can be set. The structure of the flexographic printing machine is known per se and is therefore not described in more detail here.

Die Durchlaufrichtung der zu bedruckenden bzw. bedruckten Bahn ist durch Pfeile angegeben. Im Bereich zwischen dem Zu- und Ablauf der Bahn 3 ist eine auch an ihren Stirnseiten geschlossene muldenförmige Haube 4 vorgesehen, welche mit ihren Rändern gegen den Gegendruckzylinder 1 weist und am Rahmen 5 der Druckmaschine befestigt ist. In der Haube 4 ist ein Sprührohr 6 angeordnet, durch welches ein Trennmittel, beispielsweise Glyzerin oder flüssige Polyäthylen-Glykole, auf die Oberfläche des Gegendruckzylinders 1 aufgesprüht werden können. Die gegen die Oberfläche des Gegendruckzylinders 1 weisenden Ränder der Haube 4 begrenzende enge Spalte, so daß aufgesprühtes Trennmittel nicht unkontrolliert austreten kann.The direction of travel of the web to be printed or printed is indicated by arrows. In the area between the inflow and outflow of the web 3, a trough-shaped hood 4 is also provided which is closed on its front sides and which points with its edges against the impression cylinder 1 and is fastened to the frame 5 of the printing press. A spray tube 6 is arranged in the hood 4, through which a separating agent, for example glycerin or liquid polyethylene glycols, can be sprayed onto the surface of the impression cylinder 1. The narrow gaps which delimit the edges of the hood 4 and point against the surface of the impression cylinder 1, so that sprayed-on release agent cannot escape in an uncontrolled manner.

Claims (5)

Druckmaschine, vorzugsweise Flexodruckmaschine, mit mindestens einem Gegendruckzylinder und mindestens einem Druckwerk mit Formatzylinder und Farbwerk, dessen Formatzylinder an den Gegendruckzylinder anstellbar ist,
dadurch gekennzeichnet,
daß dem Gegendruckzylinder (1) in dem Bereich zwischen der zugeführten und der abgeführten zu bedruckenden Bahn (3), in dem dieser nicht von einer Bahn umschlungen ist, eine Sprüheinrichtung (6) zum Aufsprühen eines das Antrocknen von Farbe verhindernden flüssigen Trenn- oder Lösemittels auf den Gegendruckzylinder (1) zugeordnet ist.Printing machine, preferably flexographic printing machine, with at least one impression cylinder and at least one printing unit with format cylinder and inking unit, the format cylinder of which can be adjusted to the impression cylinder,
characterized,
that the impression cylinder (1) in the area between the fed and the discharged web to be printed (3), in which this is not wrapped by a web, a spray device (6) for spraying on a paint-preventing liquid separating agent or solvent is assigned to the impression cylinder (1). Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Sprüheinrichtung aus einem parallel zu einer Mantellinie des Gegendruckzylinders (1) im Abstand von diesem angeordneten Sprührohr (6) besteht.Printing machine according to claim 1, characterized in that the spraying device is arranged at a distance from it from a parallel to a surface line of the impression cylinder (1) Spray tube (6) exists. Druckmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Sprührohr (6) durch eine Haube (4) abgedeckt ist.Printing machine according to claim 1 or 2, characterized in that the spray tube (6) is covered by a hood (4). Druckmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß diese nur einen Gegendruckzylinder aufweist, dem mehrere Druckwerke (2) zugeordnet sind.Printing machine according to one of claims 1 to 3, characterized in that it has only one impression cylinder, to which several printing units (2) are assigned. Druckmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Lösemittel Glyzerin, Polyäthylen-Glykole, Silikon-Öle oder hochsiedende Kohlenwasserstoffe verwendet werden.Printing machine according to one of claims 1 to 4, characterized in that glycerin, polyethylene glycols, silicone oils or high-boiling hydrocarbons are used as solvents.
EP19920118823 1991-11-21 1992-11-03 Printing machine Withdrawn EP0544126A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4138326 1991-11-21
DE4138326 1991-11-21
DE19924200767 DE4200767A1 (en) 1991-11-21 1992-01-14 PRINTING MACHINE
DE4200767 1992-01-14

Publications (2)

Publication Number Publication Date
EP0544126A2 true EP0544126A2 (en) 1993-06-02
EP0544126A3 EP0544126A3 (en) 1993-06-09

Family

ID=25909358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920118823 Withdrawn EP0544126A3 (en) 1991-11-21 1992-11-03 Printing machine

Country Status (2)

Country Link
EP (1) EP0544126A3 (en)
DE (1) DE4200767A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1238803A1 (en) * 1998-12-31 2002-09-11 Koenig & Bauer Aktiengesellschaft Method for cleaning a roller
EP1354703A3 (en) * 2002-04-20 2004-10-27 Koenig & Bauer Aktiengesellschaft Sheet guiding device
EP1834770A2 (en) * 2006-03-18 2007-09-19 MAN Roland Druckmaschinen AG Satellite print unit for a web printing press
WO2017207577A1 (en) * 2016-05-30 2017-12-07 Windmöller & Hölscher Kg Device and method for cleaning a central impression cylinder of a flexographic printing press

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI101059B (en) * 1995-03-24 1998-04-15 Rolltest Oy Procedure for cleaning the center cylinder of a printing machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE106592C (en) *
US2267975A (en) * 1939-03-13 1941-12-30 Hugh J Mooney Impression cylinder spray apparatus
FR2587274A3 (en) * 1985-09-16 1987-03-20 Mareels Gerard Anti-maculating device for transporting a printed strip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE106592C (en) *
US2267975A (en) * 1939-03-13 1941-12-30 Hugh J Mooney Impression cylinder spray apparatus
FR2587274A3 (en) * 1985-09-16 1987-03-20 Mareels Gerard Anti-maculating device for transporting a printed strip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1238803A1 (en) * 1998-12-31 2002-09-11 Koenig & Bauer Aktiengesellschaft Method for cleaning a roller
EP1354703A3 (en) * 2002-04-20 2004-10-27 Koenig & Bauer Aktiengesellschaft Sheet guiding device
EP1834770A2 (en) * 2006-03-18 2007-09-19 MAN Roland Druckmaschinen AG Satellite print unit for a web printing press
EP1834770A3 (en) * 2006-03-18 2012-03-07 manroland AG Satellite print unit for a web printing press
WO2017207577A1 (en) * 2016-05-30 2017-12-07 Windmöller & Hölscher Kg Device and method for cleaning a central impression cylinder of a flexographic printing press

Also Published As

Publication number Publication date
EP0544126A3 (en) 1993-06-09
DE4200767A1 (en) 1993-05-27

Similar Documents

Publication Publication Date Title
DE2815388C3 (en) Device for washing cylinders on printing machines, in particular offset printing machines
EP0429852B1 (en) Printing tower comprising at least two superposed printing units of the &#34;satellite&#34; type
DE2202545B2 (en) Screen printing process and apparatus
DE2414657A1 (en) DEVICE FOR APPLYING LIQUID OR PASTOESE MASSES ON A TRUCK
DE3432807C2 (en)
DE4439144C2 (en) Inking unit of a rotary offset printing press
DE3241124A1 (en) COLOR DIVIDER IN A COLOR BOX OF A ROTARY PRINTING MACHINE
EP0751256A2 (en) Doctoring assembly
DE3329331A1 (en) PRINT WORK WITH SHORT INK
EP0544126A2 (en) Printing machine
DE102005039078B3 (en) Powder spraying device for use in printing machine, has spray nozzles, where powder density is increased in boundary region of elbow or web as nozzles are inclined in boundary region
DE3125434A1 (en) DEVICE FOR SUPPLYING COLOR TO THE PRINT PLATE OF A PRINTING MACHINE
DE69835725T2 (en) Method and device for coloring a printing plate with a paint container
DE3203948C2 (en) Rotary offset printing machine
DE3040388A1 (en) SHEET PRINTING MACHINE WITH AT LEAST ONE PRINTING UNIT FOR BEAUTIFUL AND REPRINTING
DE4211638C2 (en) Process and device for painting and for printing sheets in a coating unit with a printing unit
EP0657282B1 (en) Inking device
DE2754663A1 (en) DEVICE FOR APPLYING MEDIA INTO A SUBSTRATE
DE19516068C2 (en) Cleaning device for printing units of rotary printing machines
DE7718008U1 (en) Flachoff set press
DE3211454C2 (en) Web-fed rotary printing press for continuous printing
DE1187245B (en) Device for cleaning the printing plates on the forme cylinder of printing machines
DE3907366A1 (en) Device for printing by the offset printing method
AT236326B (en) Method and device for producing a print through in thick fabric webs
DE1943610A1 (en) Device on machines for handling paper webs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE DK ES FR GB IT

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE DK ES FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19931210