EP0531878A1 - Forme cylinder in an offset printing machine - Google Patents

Forme cylinder in an offset printing machine Download PDF

Info

Publication number
EP0531878A1
EP0531878A1 EP92115030A EP92115030A EP0531878A1 EP 0531878 A1 EP0531878 A1 EP 0531878A1 EP 92115030 A EP92115030 A EP 92115030A EP 92115030 A EP92115030 A EP 92115030A EP 0531878 A1 EP0531878 A1 EP 0531878A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pores
cylinder jacket
forme cylinder
forme
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.)
Granted
Application number
EP92115030A
Other languages
German (de)
French (fr)
Other versions
EP0531878B1 (en
Inventor
Barbara Dr. Nüssel
Josef Dr. Schneider
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 EP0531878A1 publication Critical patent/EP0531878A1/en
Application granted granted Critical
Publication of EP0531878B1 publication Critical patent/EP0531878B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/006—Printing plates or foils; Materials therefor made entirely of inorganic materials other than natural stone or metals, e.g. ceramics, carbide materials, ferroelectric materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • 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
    • B41F13/10—Forme cylinders
    • 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
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • 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 forme cylinder in an offset printing machine for an erasable direct imaging with a cylinder jacket with a hydrophilic or hydrophilizable surface that can be pulled onto a cylinder body.
  • a generic forme cylinder is known from DE-PS 36 36 129.
  • This type of forme cylinder has a cylinder jacket with a printing surface that has heat-insulating properties and a hydrophilic character.
  • An image information transmission unit within the printing press is assigned to the forme cylinder, via which the image information is transferred to the surface of the printing form in the form of ink-accepting surface elements.
  • the image information can be deleted and the form cylinder within the printing press can be rewritten for an image change.
  • the fountain solution is supplied to the forme cylinder in the manner customary in offset printing by means of additional dampening rollers or dampers.
  • US Pat. No. 4,967,663 proposes the use of an unengraved dosing roller made of porous ceramic, in which the pores of the ceramic have the function of taking up the ink liquid instead of ink cups.
  • the production of a porous ceramic cylinder is state of the art and also described in detail using the example of a metering roller in US Pat. No. 4,967,663.
  • Pore size and number of pores is set by adding organic fillers to the ceramic mass. The organic fillers burn when the ceramic is fired, leaving a porous ceramic body. Suitable organic fillers are e.g. B. ground walnut shells, wood powder, straw powder, fish oil, etc.
  • a plastic foam e.g. B. Polyurethane foam is immersed in a ceramic suspension. When the ceramic is fired, the plastic foam burns out, leaving a so-called foam ceramic. In this way, pore diameters between 3 and 100 ⁇ m and a porosity between 2 and 90% can be set.
  • the object of the invention is to form a porous ceramic cylinder so that it can be directly imaged and erased, ie. H. Reusable forme cylinder can be used and to which dampening solution can be fed to the surface of the forme cylinder without additional dampening rollers and dampers.
  • a forme cylinder of the type mentioned in the introduction in which the cylinder jacket has a plurality of pores which are essentially of the same size and are uniformly distributed.
  • the pore size and the number of pores can be adjusted in terms of production.
  • the preferred porosity is between 20 and 45%.
  • An advantageous measure consists in varying the diameter of the pores in such a way that it decreases from the inside of the cylinder jacket to the outside of the cylinder jacket and is of the order of 3 to 100 ⁇ m.
  • the pores of the ceramic cylinder jacket communicate with each other.
  • Fountain solution can be guided through the roller body in such a way that the fountain solution can reach the surface thereof through the pores of the cylinder jacket.
  • the dampening solution is guided through the cylinder core in a manner known per se, as is used in the cooling of dampening or ink rubbers.
  • a dampening solution chamber is provided between the cylinder jacket and the cylinder core, into which dampening solution supply or discharge lines open.
  • Suitable porous ceramics for the application on which the invention is based are e.g. B. aluminum oxide (Al2O3), zirconium oxide (ZrO3), cordierite (Al-Mg silicate), steatite (Mg silicate) or silicon carbide (SiC).
  • porous forme cylinders In addition to ceramics, materials from which porous forme cylinders can be produced are glass or metals or metal alloys.
  • bronzes and chromium-nickel alloys are used as materials.
  • a forme cylinder 1 can be seen in a spatial representation, the cylinder core 2 any material, for. B. iron, and has a coated cylinder jacket 3 made of porous ceramic.
  • An advantageous measure with high porosity of the cylinder jacket 3 is to use a steel cylinder body for better mechanical stabilization of the cylinder jacket 3.
  • FIG. 2 shows a section of the imageable surface 4 of the cylinder jacket 3. It has a hydrophilic character and has uniformly distributed pores 5 of essentially the same size which are open towards the surface 4.
  • a dampening solution space 6 is provided in the pressure area of the surface 4 of the cylinder jacket 3 and is delimited on the front sides by the cylinder body 2 and the circumference by the cylinder jacket 3.
  • the dampening solution can be supplied to the dampening solution space via dampening agent supply and discharge lines through the roller core 2 and reaches the surface 4 of the same through the pores 5 of the ceramic cylinder jacket 3 that communicate with one another.
  • Such an endless cylinder jacket 3 made of porous ceramic can, for. B. via thermal transfer, ink-jet or similar methods directly by means of an image information transmission unit within the printing machine.
  • the surface 4 of the cylinder jacket 3 is dampened directly from the interior of the porous ceramic forme cylinder 1. This has the particular advantage that no additional dampening rollers and / or dampers are necessary.
  • the pores 5 are clogged, the dampening solution cannot get to the surface 4, so that ink-carrying and water-carrying areas on the surface are desired 4 of the cylinder jacket 3 arise.
  • the imaging must be removed. This can e.g. B. by low pressure plasma treatment, burning with an oxyhydrogen flame or mechanical grinding.
  • the interior of the porous cylinder 1 becomes hotter Water vapor or other hot gases are supplied, which lift or detach the imaging from the printing form surface 4.
  • An advantage of this deletion method is that the attack to remove the imaging takes place directly at the critical point, ie at the places where the imaged material is located, and not some atomic layers of imaged material have to be softened before the decisive weakening of the Adhesion between oleophilic material and printing form surface 4 can take place.

Abstract

In a forme cylinder in an offset printing machine for erasable direct imaging, having a cylinder shell with a hydrophilic surface, which cylinder shell can be mounted on a cylinder body, the cylinder shell has a plurality of pores. The pores are of substantially equal size and are distributed evenly. The size and number of pores are adjustable. A damping medium can be passed through the cylinder body in such a way that the damping medium can pass through the pores to the surface of the cylinder shell. <IMAGE>

Description

Die Erfindung betrifft einen Formzylinder in einer Offsetdruckmaschine für eine löschbare Direktbebilderung mit einem auf einen Zylinderkörper aufziehbaren Zylindermantel mit hydrophiler bzw. hydrophilierbarer Oberfläche.The invention relates to a forme cylinder in an offset printing machine for an erasable direct imaging with a cylinder jacket with a hydrophilic or hydrophilizable surface that can be pulled onto a cylinder body.

Aus der DE-PS 36 36 129 ist ein gattungsgemäßer Formzylinder bekannt. Diese Art eines Formzylinders weist einen Zylindermantel mit einer druckenden Oberfläche auf, die wärmeisolierende Eigenschaften und einen hydrophilen Charakter besitzt. Dem Formzylinder ist eine Bildinformations-Übertragungseinheit innerhalb der Druckmaschine zugeordnet, über die die Bildinformation in Form von farbannehmenden Flächenelementen auf die Oberfläche der Druckform übertragen wird. Die Bildinformation ist löschbar und der Formzylinder innerhalb der Druckmaschine für eine Bildänderung erneut umschreibbar. Die Feuchtmittelversorgung des Formzylinders wird in der im Offsetdruck üblichen Weise mittels zusätzlicher Feuchtauftragswalzen bzw. Feuchtreiber vorgenommmen.A generic forme cylinder is known from DE-PS 36 36 129. This type of forme cylinder has a cylinder jacket with a printing surface that has heat-insulating properties and a hydrophilic character. An image information transmission unit within the printing press is assigned to the forme cylinder, via which the image information is transferred to the surface of the printing form in the form of ink-accepting surface elements. The image information can be deleted and the form cylinder within the printing press can be rewritten for an image change. The fountain solution is supplied to the forme cylinder in the manner customary in offset printing by means of additional dampening rollers or dampers.

In der US-PS 4 967 663 wird die Anwendung einer ungravierten Dosierwalze aus poröser Keramik vorgeschlagen, bei der die Poren der Keramik die Funktion haben, die Farbflüssigkeit anstatt von Farbnäpfchen aufzunehmen. Die Herstellung eines porösen keramischen Zylinders ist Stand der Technik und auch am Beispiel einer Dosierwalze in der US-PS 4 967 663 im einzelnen beschrieben. Porengröße und Anzahl der Poren wird durch den Zusatz organischer Füllstoffe zur Keramikmasse eingestellt. Die organischen Füllstoffe verbrennen beim Brennen der Keramik, zurück bleibt ein poröser Keramikkörper. Geeignete organische Füllstoffe sind z. B. gemahlene Walnußschalen, Holzpulver, Strohpulver, Fischöl, etc.US Pat. No. 4,967,663 proposes the use of an unengraved dosing roller made of porous ceramic, in which the pores of the ceramic have the function of taking up the ink liquid instead of ink cups. The production of a porous ceramic cylinder is state of the art and also described in detail using the example of a metering roller in US Pat. No. 4,967,663. Pore size and number of pores is set by adding organic fillers to the ceramic mass. The organic fillers burn when the ceramic is fired, leaving a porous ceramic body. Suitable organic fillers are e.g. B. ground walnut shells, wood powder, straw powder, fish oil, etc.

In der DE-PS 38 40 137 ist eine andere Möglichkeit zur Herstellung eines porösen keramischen Skeletts offenbart. Ein Kunststoffschaum, z. B. Polyurethanschaum wird in eine Keramiksuspension getaucht. Beim Brennen der Keramik brennt der Kunststoffschaum heraus, zurück bleibt eine sogenannte Schaumkeramik. Auf diese Weise lassen sich Porendurchmesser zwischen 3 und 100 µm, sowie eine Porosität zwischen 2 und 90 % einstellen.Another possibility for producing a porous ceramic skeleton is disclosed in DE-PS 38 40 137. A plastic foam, e.g. B. Polyurethane foam is immersed in a ceramic suspension. When the ceramic is fired, the plastic foam burns out, leaving a so-called foam ceramic. In this way, pore diameters between 3 and 100 µm and a porosity between 2 and 90% can be set.

Aufgabe der Erfindung ist es, einen porösen Keramikzylinder so auszubilden, daß er als direktbebilderbarer und löschbarer, d. h. wiederverwendbarer Formzylinder einsetzbar ist und zu dem ohne zusätzliche Feuchtauftragswalzen und Feuchtreiber Feuchtmittel zur Oberfläche des Formzylinders zuführbar ist.The object of the invention is to form a porous ceramic cylinder so that it can be directly imaged and erased, ie. H. Reusable forme cylinder can be used and to which dampening solution can be fed to the surface of the forme cylinder without additional dampening rollers and dampers.

Die Lösung dieser Aufgabe gelingt erfindungsgemäß durch einen Formzylinder der eingangs genannten Art, bei welchem der Zylindermantel eine Mehrzahl von Poren aufweist, die im wesentlichen gleicher Größe und gleichmäßig verteilt sind. Die Porengröße und die Anzahl` der Poren ist herstellungsmäßig einstellbar. Die bevorzugte Porösität liegt zwischen 20 und 45 %. Eine vorteilhafte Maßnahme besteht darin, den Durchmesser der Poren in der Weise zu variieren, daß er von der Innenseite des Zylindermantels zur Außenseite desselben hin abnimmt und sich in der Größenordnung von 3 bis 100 µm bewegt. Die Poren des keramischen Zylindermantels kommunizieren miteinander. Durch den Walzenkörper ist Feuchtmittel in der Weise führbar, daß das Feuchtmittel durch die Poren des Zylindermantels an die Oberfläche desselben gelangen kann. Die Feuchtmittelführung durch den Zylinderkern geschieht in an sich bekannter Weise, wie sie bei der Kühlung von Feucht- oder Farbreibern angewendet wird. Zwischen Zylindermantel und Zylinderkern ist ein Feuchtmittelraum vorgesehen, in den Feuchtmittelzuführ- bzw. Ablaufleitungen münden.This object is achieved according to the invention by a forme cylinder of the type mentioned in the introduction, in which the cylinder jacket has a plurality of pores which are essentially of the same size and are uniformly distributed. The pore size and the number of pores can be adjusted in terms of production. The preferred porosity is between 20 and 45%. An advantageous measure consists in varying the diameter of the pores in such a way that it decreases from the inside of the cylinder jacket to the outside of the cylinder jacket and is of the order of 3 to 100 μm. The pores of the ceramic cylinder jacket communicate with each other. Fountain solution can be guided through the roller body in such a way that the fountain solution can reach the surface thereof through the pores of the cylinder jacket. The dampening solution is guided through the cylinder core in a manner known per se, as is used in the cooling of dampening or ink rubbers. A dampening solution chamber is provided between the cylinder jacket and the cylinder core, into which dampening solution supply or discharge lines open.

Geeignete poröse Keramiken für die der Erfindung zugrundeliegende Anwendung sind z. B. Aluminiumoxid (Al₂O₃), Zirkonoxid (ZrO₃), Cordierit (Al-Mg-Silikat), Steatit (Mg-Silikat) oder Siliciumcarbid (SiC).Suitable porous ceramics for the application on which the invention is based are e.g. B. aluminum oxide (Al₂O₃), zirconium oxide (ZrO₃), cordierite (Al-Mg silicate), steatite (Mg silicate) or silicon carbide (SiC).

Materialien aus denen poröse Formzylinder hergestellt werden können sind neben Keramik auch Glas oder Metalle bzw. Metallegierungen. Die pulvermetallurgische Herstellung von Filtern aus Sintermetall, auch in Form von Rohren, ist Stand der Technik, ebenso, wie die gezielte Einstellung unterschiedlicher Porengrößen und Porenverteilungen. Als Werkstoffe kommen insbesondere Bronzen und Crom-Nickel-Legierungen zum Einsatz.In addition to ceramics, materials from which porous forme cylinders can be produced are glass or metals or metal alloys. The powder metallurgical production of filters made of sintered metal, also in the form of tubes, is state of the art, as is the targeted setting of different pore sizes and pore distributions. In particular, bronzes and chromium-nickel alloys are used as materials.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt. Es zeigt

Fig. 1
einen Ausschnitt einer räumlichen Darstellung eines erfindungsgemäßen Formzylinder,
Fig. 2
eine vergrößerte Teilansicht der Oberfläche des Zylindermantels,
Fig. 3
einen Schnitt durch den erfindungsgemäßen Formzylinder.
An embodiment of the invention is shown schematically in the drawing. It shows
Fig. 1
a section of a spatial representation of a forme cylinder according to the invention,
Fig. 2
an enlarged partial view of the surface of the cylinder jacket,
Fig. 3
a section through the forme cylinder according to the invention.

In Fig. 1 ist ein Formzylinder 1 in räumlicher Darstellung zu sehen, der einen Zylinderkern 2 beliebigen Materials, z. B. Eisen, und einen darauf überzogenen Zylindermantel 3 aus poröser Keramik aufweist. Eine vorteilhafte Maßnahme bei hoher Porösität des Zylindermantels 3 besteht darin, zur besseren mechanischen Stabilisierung des Zylindermantels 3 einen Zylinderkörper aus Stahl zu verwenden.In Fig. 1, a forme cylinder 1 can be seen in a spatial representation, the cylinder core 2 any material, for. B. iron, and has a coated cylinder jacket 3 made of porous ceramic. An advantageous measure with high porosity of the cylinder jacket 3 is to use a steel cylinder body for better mechanical stabilization of the cylinder jacket 3.

Fig. 2 zeigt einen Ausschnitt der bebilderbaren Oberfläche 4 des Zylindermantels 3. Sie besitzt einen hydrophilen Charakter und weist gleichmäßig verteilte, zur Oberfläche 4 hin offene Poren 5 im wesentlichen gleicher Größe auf.2 shows a section of the imageable surface 4 of the cylinder jacket 3. It has a hydrophilic character and has uniformly distributed pores 5 of essentially the same size which are open towards the surface 4.

Fig. 3 zeigt nochmals den Formzylinder 1 im Schnitt. Zwischen dem Zylindermantel 3 und dem Zylinderkern 2 ist im Druckbereich der Oberfläche 4 des Zylindermantels 3 ein an den Stirnseiten durch den Zylinderkörper 2 und im Umfang durch den Zylindermantel 3 begrenzter ein Feuchtmittelraum 6 vorgesehen. Ober Feuchtmittelzuführ- bzw. Abführleitungen durch den Walzenkern 2 ist Feuchtmittel dem Feuchtmittelraum zuführbar und gelangt durch die miteinander kommunizierenden Poren 5 des keramischen Zylindermantels 3 an die Oberfläche 4 desselben.3 again shows the forme cylinder 1 in section. Between the cylinder jacket 3 and the cylinder core 2, a dampening solution space 6 is provided in the pressure area of the surface 4 of the cylinder jacket 3 and is delimited on the front sides by the cylinder body 2 and the circumference by the cylinder jacket 3. The dampening solution can be supplied to the dampening solution space via dampening agent supply and discharge lines through the roller core 2 and reaches the surface 4 of the same through the pores 5 of the ceramic cylinder jacket 3 that communicate with one another.

Der grundsätzliche Aufbau und die Wirkungsweise der Feuchtmittelzufuhr eines Zylinders ist im Zusammenhang mit gekühlten Feucht- bzw. Farbreibern an sich bekannt und bedürfen daher im vorliegenden Zusammenhang keiner eingehenden Erläuterung mehr.The basic structure and the mode of action of the dampening solution supply of a cylinder are known per se in connection with cooled dampening or ink rubbers and therefore do not require any detailed explanation in the present context.

Ein solch endloser aus poröser Keramik hergestellter Zylindermantel 3 kann z. B. über Thermotransfer-, Ink-jet- oder ähnlichen Verfahren direkt mittels einer Bildinformations-Übertragsungseinheit innerhalb der Druckmaschine bildmäßig beschrieben werden. Die Feuchtung der Oberfläche 4 des Zylindermantels 3 erfolgt direkt aus dem Inneren des porösen keramischen Formzylinders 1. Dies hat den besonderen Vorteil, daß keine zusätzlichen Feuchtauftragswalzen und/oder Feuchtreiber notwendig sind.Such an endless cylinder jacket 3 made of porous ceramic can, for. B. via thermal transfer, ink-jet or similar methods directly by means of an image information transmission unit within the printing machine. The surface 4 of the cylinder jacket 3 is dampened directly from the interior of the porous ceramic forme cylinder 1. This has the particular advantage that no additional dampening rollers and / or dampers are necessary.

An den Stellen, an denen auf der Oberfläche 4 des keramischen Zylindermantels 3 bildmäßig aufgebrachtes, farbannehmendes Material sitzt, sind die Poren 5 verstopft, das Feuchtmittel kann nicht bis an die Oberfläche 4 gelangen, so daß in gewünschter Weise farbführende und wasserführende Bereiche auf der Oberfläche 4 des Zylindermantels 3 entstehen. Zur wiederholten Verwendung des Formzylinders 1 muß die Bebilderung entfernt werden. Dies kann z. B. durch Niederdruckplasmabehandlung, Abbrennen mit einer Knallgasflamme oder mechanisches Abschleifen erfolgen. Bei einem weiteren Löschverfahren, daß sich die Porösität des Formzylinders 1 zu Nutze macht, werden vom inneren des porösen Zylinders 1 heißer Wasserdampf oder andere heiße Gase zugeführt, die die Bebilderung von der Druckformoberfläche 4 abheben bzw. absprengen. Vorteilhaft bei diesem Löschverfahren ist, daß der Angriff zur Entfernung der Bebilderung direkt an der kritischen Stelle, d. h. an den Stellen, an denen das bildmäßig aufgebrachte Material sitzt, erfolgt und nicht erst einige Atomlagen bildmäßig aufgebrachtes Material erweicht werden müssen, bevor die entscheidende Schwächung der Adhäsion zwischen oleophilem Material und Druckformoberfläche 4 erfolgen kann.At the points where there is an image-accepting, ink-accepting material on the surface 4 of the ceramic cylinder jacket 3, the pores 5 are clogged, the dampening solution cannot get to the surface 4, so that ink-carrying and water-carrying areas on the surface are desired 4 of the cylinder jacket 3 arise. To use the forme cylinder 1 repeatedly, the imaging must be removed. This can e.g. B. by low pressure plasma treatment, burning with an oxyhydrogen flame or mechanical grinding. In a further extinguishing process that makes use of the porosity of the forme cylinder 1, the interior of the porous cylinder 1 becomes hotter Water vapor or other hot gases are supplied, which lift or detach the imaging from the printing form surface 4. An advantage of this deletion method is that the attack to remove the imaging takes place directly at the critical point, ie at the places where the imaged material is located, and not some atomic layers of imaged material have to be softened before the decisive weakening of the Adhesion between oleophilic material and printing form surface 4 can take place.

Claims (5)

Formzylinder in einer Offsetdruckmaschine für eine löschbare Direktbebilderung mit einem auf einen Zylinderkörper aufziehbaren Zylindermantel mit hydrophiler bzw. hydrophilierbarer Oberfläche, dadurch gekennzeichnet, daß der Zylindermantel (3) eine Mehrzahl von Poren (5), die im wesentlichen gleicher Größe und gleichmäßig verteilt sind, aufweist, wobei die Porengröße und die Anzahl der Poren (5) einstellbar ist und durch den Walzenkörper (2) in der Weise Feuchtmittel führbar ist, daß das Feuchtmittel durch die Poren (5) und die Oberfläche (4) des Zylindermantels (3) gelangen kann.Forme cylinder in an offset printing machine for an erasable direct imaging with a cylinder jacket with a hydrophilic or hydrophilizable surface that can be pulled onto a cylinder body, characterized in that the cylinder jacket (3) has a plurality of pores (5) which are essentially of the same size and are evenly distributed , wherein the pore size and the number of pores (5) is adjustable and can be guided through the roller body (2) in such a way that the dampening solution can get through the pores (5) and the surface (4) of the cylinder jacket (3) . Formzylinder nach Anspruch 1, dadurch gekennzeichnet, daß die Porosität zwischen 20 und 45 % eingestellt ist.Forme cylinder according to claim 1, characterized in that the porosity is set between 20 and 45%. Formzylinder nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Porendurchmesser von der Innenseite des Zylindermantels (3) zur Außenseite desselben hin variiert.Forme cylinder according to one of the preceding claims, characterized in that the pore diameter varies from the inside of the cylinder jacket (3) to the outside of the same. Formzylinder nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet daß, der Zylinderkörper (2) bei hoher Porosität des Zylindermantels (3) zur besseren mechanischen Stabilisierung desselben aus Stahl gefertigt ist.Forme cylinder according to one of the preceding claims, characterized in that the cylinder body (2) with high porosity of the cylinder jacket (3) is made of steel for better mechanical stabilization thereof. Formzylinder nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der poröse Zylindermantel (3) aus Keramik, Glas oder metallischen Werkstoffen besteht.Forme cylinder according to one of the preceding claims, characterized in that the porous cylinder jacket (3) consists of ceramic, glass or metallic materials.
EP92115030A 1991-09-12 1992-09-03 Forme cylinder in an offset printing machine Expired - Lifetime EP0531878B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4130264 1991-09-12
DE4130264A DE4130264A1 (en) 1991-09-12 1991-09-12 FORM CYLINDERS IN AN OFFSET PRINTING MACHINE

Publications (2)

Publication Number Publication Date
EP0531878A1 true EP0531878A1 (en) 1993-03-17
EP0531878B1 EP0531878B1 (en) 1996-11-27

Family

ID=6440393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115030A Expired - Lifetime EP0531878B1 (en) 1991-09-12 1992-09-03 Forme cylinder in an offset printing machine

Country Status (5)

Country Link
US (1) US5293817A (en)
EP (1) EP0531878B1 (en)
JP (1) JP3318005B2 (en)
CA (1) CA2076274C (en)
DE (2) DE4130264A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0769372A1 (en) * 1995-10-20 1997-04-23 Eastman Kodak Company Method of lithographic printing
EP0872339A1 (en) * 1997-04-18 1998-10-21 Eastman Kodak Company Zirconia alloy cylinders and sleeves for lithographic imaging and printing methods
US5836249A (en) * 1995-10-20 1998-11-17 Eastman Kodak Company Laser ablation imaging of zirconia-alumina composite ceramic printing member
US5836248A (en) * 1997-05-01 1998-11-17 Eastman Kodak Company Zirconia-alumina composite ceramic lithographic printing member
US5839369A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Method of controlled laser imaging of zirconia alloy ceramic lithographic member to provide localized melting in exposed areas
US5839370A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Flexible zirconia alloy ceramic lithographic printing tape and method of using same
US5855173A (en) * 1995-10-20 1999-01-05 Eastman Kodak Company Zirconia alloy cylinders and sleeves for imaging and lithographic printing methods
US5870956A (en) * 1995-12-21 1999-02-16 Eastman Kodak Company Zirconia ceramic lithographic printing plate
US5893328A (en) * 1997-05-01 1999-04-13 Eastman Kodak Company Method of controlled laser imaging of zirconia-alumina composite ceramic lithographic printing member to provide localized melting in exposed areas
US5925496A (en) * 1998-01-07 1999-07-20 Eastman Kodak Company Anodized zirconium metal lithographic printing member and methods of use
US5927207A (en) * 1998-04-07 1999-07-27 Eastman Kodak Company Zirconia ceramic imaging member with hydrophilic surface layer and methods of use

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700296B1 (en) * 1993-01-14 1995-02-24 Nipson Printing process and press for implementation.
US6779449B1 (en) * 1994-09-15 2004-08-24 Man Roland Druckmaschinen Ag Carrying sleeve for printing and transfer forms and a process for production of such a carrying sleeve
US5660109A (en) * 1995-02-06 1997-08-26 Constantino; Ronald Liquid metering roll
DE19740245A1 (en) * 1997-09-12 1999-03-18 Heidelberger Druckmasch Ag Thermal spray process for carrier body and device for carrying out the process
JP3739962B2 (en) 1998-05-18 2006-01-25 富士写真フイルム株式会社 Planographic printing plate precursor, lithographic printing plate making method using the same, and lithographic printing plate precursor manufacturing method
DE19911965C2 (en) * 1999-03-17 2003-04-30 Wifag Maschf Printing form, process for its production and printing forme cylinder for a wet offset printing
DE19911906A1 (en) * 1999-03-17 2000-09-28 Wifag Maschf Illustration of a printing form for wet offset printing
US6673391B1 (en) 2002-08-09 2004-01-06 Alcoa Inc. Ceramic applicator device and method of use
DE102015202757B3 (en) * 2015-02-16 2015-10-08 Koenig & Bauer Ag Offset

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2329744A1 (en) * 1972-06-12 1974-01-03 Matek Corp CAPILLARY DEVICES AND METHODS FOR THEIR MANUFACTURING
EP0264604A2 (en) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Lithographic-printing plate
DE9012211U1 (en) * 1990-08-24 1990-10-25 Siemens Ag, 8000 Muenchen, De
EP0396114A2 (en) * 1989-05-02 1990-11-07 Praxair S.T. Technology, Inc. Liquid transfer articles and method for producing them
EP0400595A2 (en) * 1989-06-01 1990-12-05 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Forme cylinder in an offset printing machine for a direct image transfer

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US683478A (en) * 1899-04-25 1901-10-01 Carl Anatole Meyer Rotary printing-machine.
US1201599A (en) * 1915-05-18 1916-10-17 Julius Lutz Printing process.
US2302816A (en) * 1941-01-11 1942-11-24 Toland Planographic printing
US2464040A (en) * 1945-01-23 1949-03-08 William C Huebner Dampening or moistening roller
US2913980A (en) * 1957-11-27 1959-11-24 Harris Intertype Corp Lithographic dampening mechanism and method
US3059573A (en) * 1960-08-26 1962-10-23 Dominic J Marzullo Dampening system for an offset lithography machine
US4458399A (en) * 1981-11-18 1984-07-10 Monarch Marking Systems, Inc. Ink roller assembly with capillary ink supply
US4967663A (en) * 1988-10-24 1990-11-06 Coors Porcelain Company Unengraved metering roll of porous ceramic
DE3840137C1 (en) * 1988-11-29 1990-03-29 Feldmuehle Ag, 4000 Duesseldorf, De
US5046417A (en) * 1990-10-01 1991-09-10 Paulson Harold E Vapor film equalizer dampening system for printing plate cylinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2329744A1 (en) * 1972-06-12 1974-01-03 Matek Corp CAPILLARY DEVICES AND METHODS FOR THEIR MANUFACTURING
EP0264604A2 (en) * 1986-10-23 1988-04-27 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Lithographic-printing plate
EP0396114A2 (en) * 1989-05-02 1990-11-07 Praxair S.T. Technology, Inc. Liquid transfer articles and method for producing them
EP0400595A2 (en) * 1989-06-01 1990-12-05 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Forme cylinder in an offset printing machine for a direct image transfer
DE9012211U1 (en) * 1990-08-24 1990-10-25 Siemens Ag, 8000 Muenchen, De

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0769372A1 (en) * 1995-10-20 1997-04-23 Eastman Kodak Company Method of lithographic printing
US5743188A (en) * 1995-10-20 1998-04-28 Eastman Kodak Company Method of imaging a zirconia ceramic surface to produce a lithographic printing plate
US5836249A (en) * 1995-10-20 1998-11-17 Eastman Kodak Company Laser ablation imaging of zirconia-alumina composite ceramic printing member
US5839369A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Method of controlled laser imaging of zirconia alloy ceramic lithographic member to provide localized melting in exposed areas
US5839370A (en) * 1995-10-20 1998-11-24 Eastman Kodak Company Flexible zirconia alloy ceramic lithographic printing tape and method of using same
US5855173A (en) * 1995-10-20 1999-01-05 Eastman Kodak Company Zirconia alloy cylinders and sleeves for imaging and lithographic printing methods
US5870956A (en) * 1995-12-21 1999-02-16 Eastman Kodak Company Zirconia ceramic lithographic printing plate
EP0872339A1 (en) * 1997-04-18 1998-10-21 Eastman Kodak Company Zirconia alloy cylinders and sleeves for lithographic imaging and printing methods
US5836248A (en) * 1997-05-01 1998-11-17 Eastman Kodak Company Zirconia-alumina composite ceramic lithographic printing member
US5893328A (en) * 1997-05-01 1999-04-13 Eastman Kodak Company Method of controlled laser imaging of zirconia-alumina composite ceramic lithographic printing member to provide localized melting in exposed areas
US5925496A (en) * 1998-01-07 1999-07-20 Eastman Kodak Company Anodized zirconium metal lithographic printing member and methods of use
US5927207A (en) * 1998-04-07 1999-07-27 Eastman Kodak Company Zirconia ceramic imaging member with hydrophilic surface layer and methods of use

Also Published As

Publication number Publication date
US5293817A (en) 1994-03-15
DE4130264A1 (en) 1993-03-18
JP3318005B2 (en) 2002-08-26
EP0531878B1 (en) 1996-11-27
DE59207581D1 (en) 1997-01-09
CA2076274C (en) 1996-10-15
JPH05221172A (en) 1993-08-31
CA2076274A1 (en) 1993-03-13

Similar Documents

Publication Publication Date Title
EP0531878B1 (en) Forme cylinder in an offset printing machine
DE4426012C2 (en) Erasable printing form, its use and methods for erasing and regenerating the printing form
DE3109314A1 (en) CERAMIC HONEYCOMB STRUCTURE BODY
EP0058812B1 (en) Porous ceramic filter and process for producing the same
DE69729488T2 (en) STOPPING AND DORN BAR FOR ROLLING A SEAMLESS STEEL TUBE AND METHOD FOR PRODUCING A SEAMLESS STEEL TUBE
DE1758532A1 (en) Ceramic hollow core, metal-ceramic composite hollow body and process for its production
DD250900A5 (en) METHOD AND DEVICE FOR PRINTING A TRACK
EP1973681A1 (en) Water-based liquid size containing a seeding agent
EP0570879B1 (en) Process and device for erasing the ink-bearing layer on the surface of an imaged printing form
DE3943746C2 (en) Carrier sheath, esp. for offset cylinders for rotary printing
DE3715536C2 (en)
DE19846677C2 (en) Print roller with replaceable outer jacket
DE3030625A1 (en) Investment mold and process for its manufacture
AT350516B (en) PROCESS FOR THE MANUFACTURING OF A PROTECTIVE SHEATH FOR FILLING A COMPRESSED GAS TANK
CH403538A (en) Grinding tool and process for its manufacture
EP1316423B1 (en) Engraved roller and method for its production and reprocessing
EP1132209B1 (en) Screen roller for a flexographic press
DE3809915C2 (en)
DE1583537A1 (en) Device for precision molding
DE3910603C2 (en)
DE4040975A1 (en) Cylinder block prodn. of light metal alloy - comprising application of an abrasion resistant coating to the support collars
DE2205694A1 (en) Process for the heat treatment of metallic flat material and support roller therefor
DE3900281A1 (en) Intaglio printing cylinder, in particular for illustration printing
DE2916046C3 (en) Continuous casting roll for steel continuous casting plants
EP0615862B1 (en) Inking roller for a printing machine

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19930330

17Q First examination report despatched

Effective date: 19940926

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

REF Corresponds to:

Ref document number: 59207581

Country of ref document: DE

Date of ref document: 19970109

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970124

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030828

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030901

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401

EUG Se: european patent has lapsed
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050401

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: MAN ROLAND DRUCKMASCHINEN AG

Free format text: MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE) -TRANSFER TO- MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE)

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: MANROLAND AG

Free format text: MAN ROLAND DRUCKMASCHINEN AG#POSTFACH 10 12 64#63012 OFFENBACH (DE) -TRANSFER TO- MANROLAND AG#MUEHLHEIMER STRA?E 341#63075 OFFENBACH (DE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20080915

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080912

Year of fee payment: 17

Ref country code: IT

Payment date: 20080925

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080918

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080919

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090903

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090903

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090903