EP0394700B1 - Impression cylinder, especially for offset-machine - Google Patents

Impression cylinder, especially for offset-machine Download PDF

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Publication number
EP0394700B1
EP0394700B1 EP90106105A EP90106105A EP0394700B1 EP 0394700 B1 EP0394700 B1 EP 0394700B1 EP 90106105 A EP90106105 A EP 90106105A EP 90106105 A EP90106105 A EP 90106105A EP 0394700 B1 EP0394700 B1 EP 0394700B1
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EP
European Patent Office
Prior art keywords
impression cylinder
cover surface
cylinder
depressions
cover
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
EP90106105A
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German (de)
French (fr)
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EP0394700A2 (en
EP0394700A3 (en
Inventor
Bert Cappel
Werner Sondergeld
Hubert Zschetzsche
Georg Hartung
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 AG
Original Assignee
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0394700A2 publication Critical patent/EP0394700A2/en
Publication of EP0394700A3 publication Critical patent/EP0394700A3/en
Application granted granted Critical
Publication of EP0394700B1 publication Critical patent/EP0394700B1/en
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Classifications

    • 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
    • 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
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments

Definitions

  • the invention relates to a printing cylinder for printing machines, in particular offset printing machines.
  • duplication is known in sheet rotation. This means a stretching of the halftone dot or the appearance of a double dot in the printed image. The print becomes full and out of focus. The point can duplicate on all sides depending on the cause. The same applies to parts of writing and drawings.
  • Various causes are blamed for duplicating in sheet rotation. For example, an incorrect handling, a rubber blanket that is too loose, wrong direction of the rubber blanket, a rubber blank that is too long, loose clamping strips of the rubber blanket, a moving plate cylinder, loosened grippers, dented paper or paper with different force-elongation behavior, electrostatically charged paper and a pressure cylinder, the surface of which is not clean, ie is smeared by paint residues, rust and the like.
  • a sheet-guiding film is known as an elevator for impression cylinders, which has good ink delivery behavior.
  • an arrangement for preventing the soiling of the impression cylinder of a counterpressure unit or between an offset printing unit and a counterpressure unit is arranged Sheet transfer cylinder known by means of an ink-repellent surface.
  • the object of the invention is to provide a printing cylinder for printing machines, e.g. To create offset printing machines, the sheet-guiding surface of which prevents different expansions of the paper and on this basis also the point shift in the printed image.
  • a jacket surface consisting of a metallic material, preferably copper, is effective against duplication if a wrinkled-grain screen structure with a screen fineness between 12 and 50 lines / cm is etched into the metallic jacket surface.
  • the production can be carried out, for example, in a manner comparable to the production of a gravure etching of gravure cylinders or rotogravure plates.
  • the jacket surface can be a direct component of the printing cylinder or a plate, film or the like, which is glued or stretched onto the printing cylinder.
  • an additional coating with a wear-resistant material e.g. a chrome plating is provided.
  • a wear-resistant material e.g. a chrome plating
  • the latter also works against smearing, since it is color-repellent. This is of particular importance on an impression cylinder of an offset printing unit.
  • the jacket surface according to the invention is thus suitable as the surface of impression cylinders, particularly in face and back printing.
  • the pressure cylinder 1 shown schematically in FIG. 1 is provided with a jacket surface 2, which according to FIG. 2 has a relief or a structure 3 in section, which consists of cup-like depressions 4, which are etched directly between grid bars 5 of a wrinkled grid Sheath surface 2 of the printing cylinder 1 or in a plate or the like that has been subsequently clamped or glued onto the printing cylinder 1.
  • the screen fineness of the wrinkled screen structure 3 is 12 to 50 lines (depressions) / cm depending on whether cardboard or thin paper is being processed.
  • the coarser structure of 12 lines (depressions) / cm is suitable for cardboard, while the finer structure of 30 to 50 lines (depressions) / cm is suitable for thin paper.
  • the jacket surface 2 consisting of copper, after the wrinkled grain structure 3 has been deeply etched into the jacket surface 2, is coated with a wear-resistant material, preferably with chrome.
  • a wear-resistant material preferably with chrome.
  • Such a structured outer surface 2 of the printing cylinder 1 prevents duplication and / or smearing of freshly printed sheets on sheet-guiding cylinders, since movement of the paper on the surface of the printing cylinder 1 is prevented, while at the same time preventing the structured surface from being marked in the printed image because the jacket surface 2 according to the invention forms a uniform base for the entire printed image.
  • the printing cylinder jacket surface 2 according to the invention is produced on a plate, an elevator, a film or the like, which is to be subsequently glued on or clamped onto the printing cylinder 1, the method steps mentioned under 1 to 3 can be omitted. Individual process steps can also be replaced by equivalent steps, e.g. Imprint a corresponding random structure before etching.
  • the production method alternatively also includes the stamping, engraving of metallic copper jacket surfaces 2 or the washing out of plastic surfaces. Details not mentioned, for example process parameters corresponding to the known intaglio etching of intaglio cylinders or intaglio plates. The same applies to the other methods mentioned for producing a jacket surface 2 with the wrinkled grain grid structure 3 according to the invention.
  • the gripper pad in the channel of the printing cylinder 1 is indicated by 6.

Abstract

In order to avoid doubling, the outer surface (2), consisting of copper, of a printing cylinder (1) has an etched distorted grain screen structure (3) with a screen definition of 12-50 lines/cm. <IMAGE>

Description

Die Erfindung betrifft einen Druckzylinder für Druckmaschinen, insbesondere Offsetdruckmaschinen.The invention relates to a printing cylinder for printing machines, in particular offset printing machines.

In der Bogenrotation ist das Phänomen des Dublierens bekannt. Hierunter versteht man ein Strecken des Rasterpunktes oder das Erscheinen eines doppelten Punktes im Druckbild. Der Druck wird voll und unscharf. Der Punkt kann je nach Ursache nach allen Seiten dublieren. Dasselbe gilt für Schrift- und Zeichnungsanteile. Für das Dublieren in der Bogenrotation werden verschiedene Ursachen verantwortlich gemacht. Beispielsweise eine falsche Abwicklung, ein zu locker sitzendes Gummituch, falsche Laufrichtung des Gummituches, ein zu langes Gummituch, lockere Klemmleisten des Gummituches, ein wandernder Plattenzylinder, zu lockere Greifer, randwelliges verbeultes Papier bzw. Papier mit unterschiedlichem Kraft-Dehnungsverhalten, elektrostatisch aufgeladenes Papier und ein Druckzylinder, dessen Manteloberfläche nicht sauber, d.h. durch Farbreste, Rost und dgl. verschmiert ist.The phenomenon of duplication is known in sheet rotation. This means a stretching of the halftone dot or the appearance of a double dot in the printed image. The print becomes full and out of focus. The point can duplicate on all sides depending on the cause. The same applies to parts of writing and drawings. Various causes are blamed for duplicating in sheet rotation. For example, an incorrect handling, a rubber blanket that is too loose, wrong direction of the rubber blanket, a rubber blank that is too long, loose clamping strips of the rubber blanket, a moving plate cylinder, loosened grippers, dented paper or paper with different force-elongation behavior, electrostatically charged paper and a pressure cylinder, the surface of which is not clean, ie is smeared by paint residues, rust and the like.

Aus der EP 0 017 776 A1 ist eine bogenführende Folie als Aufzug für Gegendruckzylinder bekannt, die ein gutes Farbabgabeverhalten besitzt.From EP 0 017 776 A1, a sheet-guiding film is known as an elevator for impression cylinders, which has good ink delivery behavior.

Gemäß der DE 2 820 549 A1 ist eine metallische Bogenführungsfolie, die ein Abschmieren der frischbedruckten Bogenseite vermeidet.According to DE 2 820 549 A1, there is a metallic sheet guiding film which avoids smearing of the freshly printed sheet side.

Nach der DE-AS 1 258 873 ist eine Anordnung zum Verhüten des Beschmutzens des Gegendruckzylinders eines Widerdruckwerks oder des zwischen einem Schöndruck- und einem Widerdruckwerk angeordneten Bogenübertragungszylinders mittels farbabstoßender Oberfläche bekannt.According to DE-AS 1 258 873, an arrangement for preventing the soiling of the impression cylinder of a counterpressure unit or between an offset printing unit and a counterpressure unit is arranged Sheet transfer cylinder known by means of an ink-repellent surface.

Aufgabe der Erfindung ist es, einen Druckzylinder für Druckmaschinen, z.B. Offsetdruckmaschinen zu schaffen, dessen bogenführende Manteloberfläche unterschiedliche Dehnungen des Papiers und auf dieser Grundlage auch die Punktverschiebung im Druckbild verhindert.The object of the invention is to provide a printing cylinder for printing machines, e.g. To create offset printing machines, the sheet-guiding surface of which prevents different expansions of the paper and on this basis also the point shift in the printed image.

Es wurde gefunden, daß eine aus einem metallischen Werkstoff, vorzugsweise Kupfer bestehende Manteloberfläche gegen Dublieren wirksam ist, wenn in die metallische Manteloberfläche eine Runzelkornrasterstruktur mit einer Rasterfeinheit zwischen 12 bis 50 Linien/cm eingeätzt ist. Die Herstellung kann beispielsweise vergleichbar der Herstellung einer Tiefdruckätzung von Tiefdruckformzylindern bzw. Tiefdruckplatten erfolgen.It has been found that a jacket surface consisting of a metallic material, preferably copper, is effective against duplication if a wrinkled-grain screen structure with a screen fineness between 12 and 50 lines / cm is etched into the metallic jacket surface. The production can be carried out, for example, in a manner comparable to the production of a gravure etching of gravure cylinders or rotogravure plates.

Alternativ ist es auch möglich äquivalente Verfahren z.B. Gravieren, Prägen von Metallfolien oder Auswaschen von Kunststoffolien, wie sie ebenfalls bei der Herstellung von Tiefdruckplatten oder bei der Tiefdruckformzylinderherstellung üblich sind, einzusetzen.Alternatively, it is also possible to use equivalent processes e.g. Engraving, embossing of metal foils or washing out of plastic foils, as are also common in the production of gravure plates or in gravure cylinder production.

Die Manteloberfläche kann dabei unmittelbar Bestandteil des Druckzylinders sein oder auch einer Platte, Folie oder dgl. sein, die auf den Druckzylinder aufgeklebt oder aufgespannt wird.The jacket surface can be a direct component of the printing cylinder or a plate, film or the like, which is glued or stretched onto the printing cylinder.

Zur Erhöhung der Verschleißfestigkeit ist eine zusätzliche Beschichtung mit einem verschleißfesten Werkstoff, z.B. ein Chromüberzug vorgesehen. Letzterer wirkt außerdem gegen Abschmieren, da er farbabweisend ist. Von besonderer Bedeutung ist das auf einem Gegendruckzylinder eines Widerdruckwerkes. Die erfindungsgemäße Manteloberfläche ist somit als Oberfläche von Druckzylindern insbesondere im Schön- und Widerdruck geeignet.To increase wear resistance, an additional coating with a wear-resistant material, e.g. a chrome plating is provided. The latter also works against smearing, since it is color-repellent. This is of particular importance on an impression cylinder of an offset printing unit. The jacket surface according to the invention is thus suitable as the surface of impression cylinders, particularly in face and back printing.

Das in der Zeichnung schematisch dargestellte Ausführungsbeispiel der Erfindung zeigt in

Fig. 1
einen Druckzylinder, schematisch,
Fig. 2
einen Schnitt in Achsrichtung durch die Manteloberfläche des Druckzylinders nach Fig. 1,
Fig. 3
eine Draufsicht auf das Runzelkornraster der Manteloberfläche des Druckzylinders in einer Vergrößerung 50:1.
The embodiment of the invention shown schematically in the drawing shows in
Fig. 1
a pressure cylinder, schematically,
Fig. 2
2 shows a section in the axial direction through the outer surface of the printing cylinder according to FIG. 1,
Fig. 3
a plan view of the wrinkled grid of the surface of the impression cylinder in an enlargement 50: 1.

Der in Fig. 1 schematisch dargestellte Druckzylinder 1 ist mit einer Manteloberfläche 2 versehen, die gemäß Fig. 2 im Schnitt ein Relief bzw. eine Struktur 3 aufweist, welche aus näpfchenartigen Vertiefungen 4 besteht, die durch Ätzen zwischen Rasterstegen 5 eines Runzelkornrasters unmittelbar in der Manteloberfläche 2 des Druckzylinders 1 oder in einer auf den Druckzylinder 1 nachträglich aufgespannten oder aufgeklebten Platte oder dgl. entstanden sind. Die Rasterfeinheit der Runzelkornrasterstruktur 3 beträgt 12 bis 50 Linien (Vertiefungen)/cm je nachdem ob Karton oder dünnes Papier verarbeitet wird. Die gröbere Struktur von 12 Linien (Vertiefungen)/cm ist für Karton geeignet, während die feinere Struktur ab 30 bis 50 Linien (Vertiefungen)/cm für dünnes Papier geeignet ist. Vorzugsweise wird die aus Kupfer bestehende Manteloberfläche 2, nach dem die Runzelkornrasterstruktur 3 tiefgeätzt in die Manteloberfläche 2 eingebracht wurde, mit einem verschleißfesten Werkstoff, vorzugsweise mit Chrom überzogen. Eine derart strukturierte Manteloberfläche 2 des Druckzylinders 1 verhindert Dublieren und/oder Abschmieren frischbedruckter Bogen auf bogenführenden Zylindern, da eine Bewegung des Papiers auf der Oberfläche des Druckzylinders 1 verhindert wird, wobei zugleich verhindert wird, daß die strukturierte Oberfläche sich im Druckbild markiert, weil die erfindungsgemäße Manteloberfläche 2 für das gesamte Druckbild eine gleichmäßige Unterlage bildet.The pressure cylinder 1 shown schematically in FIG. 1 is provided with a jacket surface 2, which according to FIG. 2 has a relief or a structure 3 in section, which consists of cup-like depressions 4, which are etched directly between grid bars 5 of a wrinkled grid Sheath surface 2 of the printing cylinder 1 or in a plate or the like that has been subsequently clamped or glued onto the printing cylinder 1. The screen fineness of the wrinkled screen structure 3 is 12 to 50 lines (depressions) / cm depending on whether cardboard or thin paper is being processed. The coarser structure of 12 lines (depressions) / cm is suitable for cardboard, while the finer structure of 30 to 50 lines (depressions) / cm is suitable for thin paper. Preferably, the jacket surface 2 consisting of copper, after the wrinkled grain structure 3 has been deeply etched into the jacket surface 2, is coated with a wear-resistant material, preferably with chrome. Such a structured outer surface 2 of the printing cylinder 1 prevents duplication and / or smearing of freshly printed sheets on sheet-guiding cylinders, since movement of the paper on the surface of the printing cylinder 1 is prevented, while at the same time preventing the structured surface from being marked in the printed image because the jacket surface 2 according to the invention forms a uniform base for the entire printed image.

Nachfolgend werden kurz wesentliche Verfahrensschritte zur Herstellung eines erfindungsgemäßen Druckzylinders 1 mit Manteloberfläche 2 beschrieben:

  • 1. Abkleben bzw. Abdecken der Schmitzringe, der Stirnflächen, der Zapfen und des Kanalbereiches des Offset-Druckzylinders 1.
  • 2. Aufkupfern des Druckzylinders 1, z.B. galvanisch, Schichtdicke ca. 0,4 mm, Badzeit ca. 4 Stunden.
  • 3. Schleifen und Polieren der so erzeugten Kupferoberfläche.
  • 4. Aufsprühen eines Photolackes.
  • 5. Aufkopieren einer Runzelkornrasterstruktur 3, d.h. einer Zufallsstruktur mit einer Rasterfeinheit von 12 bis 50 Linien/cm, je nach Anforderung des Papiers.
  • 6. Entwickeln des Photolackes.
  • 7. Tiefätzen des Druckzylinders, Ätzzeit ca. 10 Min., Ätztiefe t ca. 5-100 Micrometer, hierbei entsteht eine Manteloberfläche 2 mit einem planflächigen Traganteil von ca. 20 bis 50% Rasterstege 5, welche die verbleibenden näpfchenartigen Vertiefungen 4 allseitig umschließen.
  • 8. Verchromen, z.B. glavanisch, der geätzten Runzelkornrasterstruktur 3 mit einer Schichtdicke von ca. 10 bis 20 Micrometer.
Essential process steps for producing a printing cylinder 1 according to the invention with a jacket surface 2 are briefly described below described:
  • 1. Mask or cover the bearer rings, the end faces, the pins and the channel area of the offset printing cylinder 1.
  • 2. Coppering the printing cylinder 1, for example galvanically, layer thickness approx. 0.4 mm, bath time approx. 4 hours.
  • 3. Grinding and polishing the copper surface produced in this way.
  • 4. Spray on a photoresist.
  • 5. Copying a wrinkled grain grid structure 3, ie a random structure with a grid fineness of 12 to 50 lines / cm, depending on the requirements of the paper.
  • 6. Develop the photoresist.
  • 7. Deep etching of the printing cylinder, etching time approx. 10 min., Etching depth t approx. 5-100 micrometers, this creates a jacket surface 2 with a flat bearing portion of approx. 20 to 50% grid bars 5, which enclose the remaining cup-like depressions 4 on all sides.
  • 8. Chromium plating, for example Glavanian, of the etched wrinkle grain structure 3 with a layer thickness of approximately 10 to 20 micrometers.

Erfolgt die Herstellung der erfindungsgemäßen Druckzylindermanteloberfläche 2 auf einer Platte, einem Aufzug, einer Folie oder dgl., die nachträglich aufgeklebt oder auf den Druckzylinder 1 aufgespannt werden soll, können die vorstehend unter 1. bis 3. genannten Verfahrensschritte entfallen. Auch können einzelne Verfahrensschritte durch äquivalente Schritte ersetzt werden, z.B. Aufdrucken einer entsprechenden Zufallsstruktur vor dem Ätzen.If the printing cylinder jacket surface 2 according to the invention is produced on a plate, an elevator, a film or the like, which is to be subsequently glued on or clamped onto the printing cylinder 1, the method steps mentioned under 1 to 3 can be omitted. Individual process steps can also be replaced by equivalent steps, e.g. Imprint a corresponding random structure before etching.

Als Herstellungsverfahren bietet sich neben dem Ätzen alternativ auch das Prägen, Gravieren metallischer Kupfermantelflächen 2 an bzw. das Auswaschen von Kunststoff-Oberflächen. Nicht erwähnte Einzelheiten, z.B. Verfahrensparameter entsprechend er bekannten Tiefdruckätzung von Tiefdruckformzylindern bzw. Tiefdruckplatten. Gleiches gilt für die anderen erwähnten Verfahren zur Herstellung einer Manteloberfläche 2 mit der erfindungsgemäßen Runzelkornrasterstruktur 3.In addition to the etching, the production method alternatively also includes the stamping, engraving of metallic copper jacket surfaces 2 or the washing out of plastic surfaces. Details not mentioned, for example process parameters corresponding to the known intaglio etching of intaglio cylinders or intaglio plates. The same applies to the other methods mentioned for producing a jacket surface 2 with the wrinkled grain grid structure 3 according to the invention.

In der Zeichnung ist mit 6 die Greiferauflage im Kanal des Druckzylinders 1 angedeutet.In the drawing, the gripper pad in the channel of the printing cylinder 1 is indicated by 6.

Claims (7)

  1. Impression cylinder (1) for printing presses characterised in that the cover surface (2) consisting of a metallic material has a wrinkled granular raster structure (3) with a raster fineness of 12 to 50 depressions (4) on a line of 1 cm length (Fig. 3).
  2. Impression cylinder (1) according to Claim 1, characterised in that the cover surface (2) is overcoated with a wear resistant material, preferably with chromium.
  3. Impression cylinder (1) according to Claim 1 and 2, characterised in that the cover surface (2) component is a plate foil, a cover or the like which is fixed or tensioned on to the impression cylinder (1).
  4. Impression cylinder (1) according to Claim 1 and 2, characterised in that the cover surface (2) is directly a part of the impression cylinder (1).
  5. Impression cylinder (1) for printing presses characterised in that the cover surface (2) consists of a wear resistant plastics on to which a wrinkled grain raster structure with a raster fineness of 12 to 50 depressions (4) on a line of 1 cm length is applied and that by stamping, engraving or the like the little basin like depressions (4) and supporting area portions (5) are generated, comparable with a gravure etching.
  6. Impression cylinder (1) according to Claim 5, characterised in that the cover surface (2) component is a plate, foil, a cover or the like which is fixed or tensioned on the impression cylinder (1).
  7. Impression cylinder (1) according to Claim 5, characterised in that the cover surface (2) is directly a component of the impression cylinder (1).
EP90106105A 1989-04-26 1990-03-30 Impression cylinder, especially for offset-machine Expired - Lifetime EP0394700B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913818 1989-04-26
DE3913818A DE3913818A1 (en) 1989-04-26 1989-04-26 PRINT CYLINDERS FOR PRINTING MACHINES, IN PARTICULAR OFFSET PRINTING MACHINES

Publications (3)

Publication Number Publication Date
EP0394700A2 EP0394700A2 (en) 1990-10-31
EP0394700A3 EP0394700A3 (en) 1991-07-10
EP0394700B1 true EP0394700B1 (en) 1994-09-07

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Application Number Title Priority Date Filing Date
EP90106105A Expired - Lifetime EP0394700B1 (en) 1989-04-26 1990-03-30 Impression cylinder, especially for offset-machine

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EP (1) EP0394700B1 (en)
AT (1) ATE111034T1 (en)
DE (2) DE3913818A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207119C2 (en) * 1992-03-06 1999-09-02 Roland Man Druckmasch Arch-guiding pressure cylinder jacket profile
DE19515393B4 (en) * 1995-04-26 2004-01-15 Man Roland Druckmaschinen Ag Surface structure carrying substrates, preferably for printing press cylinders or their elevators
US6048446A (en) * 1997-10-24 2000-04-11 R.R. Donnelley & Sons Company Methods and apparatuses for engraving gravure cylinders

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258873C2 (en) * 1963-05-27 1974-01-24 ARRANGEMENT TO PREVENT THE SOILING OF THE COUNTERPRINTING CYLINDER OF A COUNTERPRINTING UNIT OR THE ARC TRANSFER CYLINDERS, SITUATED BETWEEN A COLLAR PRINTING UNIT AND A REPOSITING UNIT, WITH A COLOR-REPELLENT SURFACE
DE2820549A1 (en) * 1977-06-24 1979-01-04 Von Roll Ag METALLIC CURVED GUIDE FILM
EP0017776A1 (en) * 1979-04-24 1980-10-29 Heidelberger Druckmaschinen Aktiengesellschaft Sheet guiding blanket for covering an impression cylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1831636U (en) * 1960-12-22 1961-05-25 Ludwig Nagel PAPER GUIDE ROLLER FOR ROTARY PRINTING MACHINES.
DE2245301A1 (en) * 1972-09-15 1974-04-04 Springer Ag Verlag Axel PAINT APPLICATION ROLLER
DD136480A1 (en) * 1978-05-26 1979-07-11 Herbert Patzelt ONE OR MULTILAYER COAT FOR BOW-LEADING CYLINDERS
JPS6160558A (en) * 1984-08-28 1986-03-28 Mutoh Ind Ltd Sheet feed roller
JPS6160557A (en) * 1984-08-28 1986-03-28 Mutoh Ind Ltd Method of forming projection on feed roller surface
GB2192254B (en) * 1986-07-02 1990-03-21 Nippon Tenshashi Kk Metal roller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258873C2 (en) * 1963-05-27 1974-01-24 ARRANGEMENT TO PREVENT THE SOILING OF THE COUNTERPRINTING CYLINDER OF A COUNTERPRINTING UNIT OR THE ARC TRANSFER CYLINDERS, SITUATED BETWEEN A COLLAR PRINTING UNIT AND A REPOSITING UNIT, WITH A COLOR-REPELLENT SURFACE
DE2820549A1 (en) * 1977-06-24 1979-01-04 Von Roll Ag METALLIC CURVED GUIDE FILM
EP0017776A1 (en) * 1979-04-24 1980-10-29 Heidelberger Druckmaschinen Aktiengesellschaft Sheet guiding blanket for covering an impression cylinder

Also Published As

Publication number Publication date
EP0394700A2 (en) 1990-10-31
DE3913818A1 (en) 1990-10-31
DE59007026D1 (en) 1994-10-13
EP0394700A3 (en) 1991-07-10
ATE111034T1 (en) 1994-09-15
DE3913818C2 (en) 1992-09-24

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