EP0544126A2 - Printing machine - Google Patents
Printing machine Download PDFInfo
- 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- Withdrawn
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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
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
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
Claims (5)
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).
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)
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)
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)
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 |
-
1992
- 1992-01-14 DE DE19924200767 patent/DE4200767A1/en not_active Withdrawn
- 1992-11-03 EP EP19920118823 patent/EP0544126A3/en not_active Withdrawn
Patent Citations (3)
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)
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 |
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Effective date: 19931210 |