EP0096275B1 - Gravure printing plate to be clamped on a clamping cylinder, and process for its production - Google Patents
Gravure printing plate to be clamped on a clamping cylinder, and process for its production Download PDFInfo
- Publication number
- EP0096275B1 EP0096275B1 EP83105073A EP83105073A EP0096275B1 EP 0096275 B1 EP0096275 B1 EP 0096275B1 EP 83105073 A EP83105073 A EP 83105073A EP 83105073 A EP83105073 A EP 83105073A EP 0096275 B1 EP0096275 B1 EP 0096275B1
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- EP
- European Patent Office
- Prior art keywords
- plate
- layer
- printing
- polymeric
- areas
- 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.)
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Links
- 238000007646 gravure printing Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000007639 printing Methods 0.000 claims description 64
- 239000000463 material Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/18—Curved printing formes or printing cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
- B41F27/1281—Devices for attaching printing elements or formes to supports for attaching flexible printing formes details of the printing plate ends
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- 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
- B41N1/16—Curved printing plates, especially cylinders
- B41N1/22—Curved printing plates, especially cylinders made of other substances
-
- 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
- B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
Definitions
- the present invention relates to an intaglio printing plate with a polymeric printing layer applied to a dimensionally stable, flexible support, which is suitable for clamping onto an intaglio clamping cylinder.
- the invention further relates to a method for producing such an intaglio printing plate.
- a plastic layer For the production of gravure printing plates with plastic printing layers, one can either apply a plastic layer to a suitable printing layer support and form the ink-absorbing depressions (cups) in the plastic layer by mechanical engraving (cf. e.g. DE-OS 27 52 500) or one is based on a light-sensitive recording material with a photopolymerizable layer applied to a dimensionally stable support, which is used e.g. B. by a raster or line positive or a halftone positive with Mariehungsraster template exposed imagewise with actinic light and then washing the unexposed portions of the layer with formation of the cell and raster structure using a developer liquid (cf. e.g. DE-OS 20 54 833, DE-OS 20 61 287, JA-PS 41361/72, DE-OS 31 28 949 and DE-OS 31 28 951).
- a developer liquid cf. e.g. DE-OS 20 54 833, DE-OS 20 61 287, JA-PS 4
- rotogravure plates are generally clamped onto a cylinder base body using a suitable clamping device.
- clamping cylinders with a cylinder channel with means for fastening and clamping the printing plates are known and are also described in the literature (cf., for example, US-A-2 157 621).
- US-A-3 191 532 describes a method for mounting thin printing plates on a cylinder for rotary printing. After clamping the printing plate, a clear gap remains in the clamping area in the clamping area, which is not closed. Obviously this publication does not concern gravure printing. The special problems which arise when clamping gravure printing plates onto a cylinder are not addressed in US Pat. No. 3,191,532; there is also no indication of their solution. Rather, the method for mounting printing plates on cylinders shown in US Pat. No. 3,191,532 is unsuitable for gravure printing.
- the present invention was based on the object of producing in a simple manner an intaglio printing plate with a plastic printing layer which can be easily and easily clamped onto intaglio clamping cylinders without the formation of an annoying gap.
- intaglio printing plates can be produced simply if, in the case of an intaglio printing plate, the polymeric printing layer, which is adherently attached to a dimensionally stable, flexible support, is removed from the support in the areas of the intaglio printing plate which are used to secure the plate to the Serve clamping cylinders and must be folded over for this.
- the invention accordingly relates to a method for producing intaglio printing plates with a polymeric printing layer applied to a dimensionally stable, flexible support for mounting on an intaglio clamping cylinder, which is characterized in that the polymeric printing layer is removed from the areas of the support to be edged for mounting.
- the invention further relates to the gravure printing plates produced in this way, suitable for clamping onto a clamping cylinder, in which the support is free of the polymeric printing layer in the areas to be folded over for clamping.
- the invention furthermore relates to special embodiments of the method and the intaglio printing plates as described below.
- the rotogravure plates according to the invention can be easily and easily attached to the conventional rotogravure clamping cylinders.
- the polymeric printing layer in these intaglio printing plates extends only over the actual printing surface corresponding to the cylinder circumference.
- conventional intaglio printing plates in which the polymeric printing layer extends over the entire length of the printing plate and is accordingly folded over onto a tensioning cylinder and inserted into the cylinder gap,
- the polymeric printing layer has a layer thickness in the range from approximately 100 to 500 .mu.m, since a particularly good gap seal is then achieved.
- the edging line running across the width of the printing plate can run perpendicular to the longitudinal sides of the printing plate and thus, after clamping, parallel to the cylinder axis;
- these fold lines, up to which the polymeric printing layer is removed from the carrier run somewhat obliquely to the cylinder axis, i. H. not exactly perpendicular to the long sides of the pressure plate.
- the supports for the rotogravure plates according to the invention which are known and known per se are dimensionally stable and flexible support materials, in particular plate-shaped steel or aluminum sheets, but also, if appropriate, suitable plastic films.
- the polymeric printing layer which is applied adherently to the carrier, for example by means of a suitable adhesion promoter, can be a simple plastic layer, such as is used for. B. is described in DE-OS 27 52 500, in which the ink-receiving recesses are mechanically engraved.
- this printing layer is preferably a photopolymeric layer which has been produced by imagewise exposure and development of a photopolymerizable layer of a mixture of a polymeric binder, photopolymerizable, ethylenically unsaturated monomers and / or oligomers and a photoinitiator compatible therewith (cf. DE-OS 20 54 833, DE-OS 20 61 287, DE-OS 3 128 949 and DE-OS 31 28 951
- the removal of the polymeric printing layer from the areas of the carrier that are to be folded over for fastening on the tensioning cylinder is advantageously carried out before the actual folding and can be done mechanically, for example, by cutting, milling or engraving.
- the rotogravure plates according to the invention can be produced particularly easily and simply, in particular with the required accuracy and precision, if one starts from a light-sensitive recording material with a photopolymerizable layer of the type mentioned and described above adhered to a dimensionally stable, flexible support.
- the photosensitive recording materials as described in DE-OS 31 28 949, to which reference is made here for details on the composition of these recording materials and on the production of gravure forms, have proven to be very advantageous.
- the intaglio printing plates according to the invention are produced by means of these light-sensitive recording materials by, in a manner known per se, the photopolymerizable layer for producing the printing layer by means of a suitable template, e.g. B. by a raster or line positive or a halftone positive with a guide raster template, imagewise exposed to actinic light and the unexposed portions of the layer using a suitable developer liquid in the formation of the raster and cell structure the unexposed portions, but not the exposed portions of the layer, are soluble, washed out and removed.
- a suitable template e.g. B. by a raster or line positive or a halftone positive with a guide raster template
- imagewise exposed to actinic light and the unexposed portions of the layer using a suitable developer liquid in the formation of the raster and cell structure the unexposed portions, but not the exposed portions of the layer, are soluble, washed out and removed.
- the exposure of the photopolymerizable layer is carried out in such a way that the photopolymerizable layer remains unexposed in the areas which are later to be folded over for clamping the printing plate, so that the photopolymeric layer in these areas is washed out with the developer liquid is removed at the same time as the remaining unexposed portions of this layer.
- the exposure of the photopolymerizable layer is preferably carried out via a register. An intaglio printing plate according to the invention is thus obtained directly, in which the areas of the support to be folded over for clamping onto the tensioning cylinder are free of the polymeric printing layer.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
Die vorliegende Erfindung betrifft eine Tiefdruckplatte mit einer auf einem dimensionsstabilen, biegsamen Träger haftfest aufgebrachten polymeren Druckschicht, die zum Aufspannen auf einen Tiefdruck-Spannzylinder geeignet ist. Die Erfindung betrifft des weiteren Verfahren zur Herstellung einer solchen Tiefdruckplatte.The present invention relates to an intaglio printing plate with a polymeric printing layer applied to a dimensionally stable, flexible support, which is suitable for clamping onto an intaglio clamping cylinder. The invention further relates to a method for producing such an intaglio printing plate.
Zur Herstellung von Tiefdruckplatten mit Kunststoff-Druckschichten kann man entweder eine Kunststoffschicht auf einen geeigneten Druckschicht-Träger aufbringen und die farbaufnehmenden Vertiefungen (Näpfchen) in der Kunststoffschicht durch mechanische Gravur ausbilden (vgl. z. B. DE-OS 27 52 500) oder man geht von einem lichtempfindlichen Aufzeichnungsmaterial mit einer auf einem dimensionsstabilen Träger aufgebrachten photopolymerisierbaren Schicht aus, die man z. B. durch ein Raster- oder Strich-Positif oder ein Halbton-Positiv mit Fürhungsraster-Vorlage bildmäßig mit aktinischem Licht belichtet und wobei man anschließend die nicht belichteten Anteile der Schicht unter Ausbildung der Näpfchen- und Rasterstruktur mit Hilfe einer Entwickler-Flüssigkeit auswäscht (vgl. z. B. DE-OS 20 54 833, DE-OS 20 61 287, JA-PS 41361/72, DE-OS 31 28 949 und DE-OS 31 28 951).For the production of gravure printing plates with plastic printing layers, one can either apply a plastic layer to a suitable printing layer support and form the ink-absorbing depressions (cups) in the plastic layer by mechanical engraving (cf. e.g. DE-OS 27 52 500) or one is based on a light-sensitive recording material with a photopolymerizable layer applied to a dimensionally stable support, which is used e.g. B. by a raster or line positive or a halftone positive with Fürhungsraster template exposed imagewise with actinic light and then washing the unexposed portions of the layer with formation of the cell and raster structure using a developer liquid (cf. e.g. DE-OS 20 54 833, DE-OS 20 61 287, JA-PS 41361/72, DE-OS 31 28 949 and DE-OS 31 28 951).
Für den Rotations-Tiefdruck werden solche Tiefdruckplatten im allgemeinen mittels einer geeigneten Spannvorrichtung auf einen Zylinder-Grundkörper aufgespannt. Entsprechende Spannzylinder mit einem Zylinderkanal mit Mitteln zum Befestigen und Spannen der Druckplatten sind bekannt und ebenfalls in der Literatur beschrieben (vgl. z. B. US-A-2 157 621).For rotogravure printing, such rotogravure plates are generally clamped onto a cylinder base body using a suitable clamping device. Corresponding clamping cylinders with a cylinder channel with means for fastening and clamping the printing plates are known and are also described in the literature (cf., for example, US-A-2 157 621).
Ein Problem hierbei ist der Spalt, der sich beim Aufspannen an den Stoßstellen der Druckplatte ausbildet. Um beim Druck ein Eindrücken der parallel zur Zylinderachse ausgerichteten Rakel in den Spalt und ein Springen der Rakel und damit eine Beschädigung von Rakel und Druckschicht zu vermeiden, wurde bereits vorgeschlagen, die Druckplatte so auf den Zylinder aufzuspannen, daß der Spalt leicht schräg zur Zylinderachse verläuft. Auch wenn somit das Eindrücken der Rakel in diesen Spalt und ein Springen der Rakel vermieden wird, füllt sich dieser Spalt beim Druck doch mit Farbe, die nicht abgerakelt werden kann, so daß sich der Spalt auf dem Druck abzeichnet.One problem here is the gap that forms at the abutment points of the pressure plate when it is clamped. In order to prevent the squeegee, which is aligned parallel to the cylinder axis, from being pressed into the gap and the squeegee from jumping and thus damaging the squeegee and the printing layer, it has already been proposed to clamp the printing plate onto the cylinder in such a way that the gap runs slightly obliquely to the cylinder axis . Thus, even if the squeegee is not pressed into this gap and the squeegee does not jump, this gap fills up with ink that cannot be scraped off, so that the gap appears on the print.
In der US-A-3 191 532 wird eine Methode zum Aufspannen von dünnen Druckplatten auf einen Zylinder für den Rotationsdruck beschrieben. Nach dem Aufspannen der Druckplatte verbleibt im Spannbereich ein deutlicher Spalt in der Druckschicht, der nicht verschlossen wird. Ganz offensichtlich betrifft diese Druckschrift nicht den Tiefdruck. Die sich beim Aufspannen von Tiefdruckplatten auf einen Zylinder ergebenden speziellen Probleme werden in der US-A-3 191 532 nicht angesprochen ; es ergibt sich hieraus auch kein Hinweis auf deren Lösung. Vielmehr ist die in der US-A-3 191 532 dargestellte Methode zum Aufspannen von Druckplatten auf Zylinder für den Tiefdruck ungeeignet.US-A-3 191 532 describes a method for mounting thin printing plates on a cylinder for rotary printing. After clamping the printing plate, a clear gap remains in the clamping area in the clamping area, which is not closed. Obviously this publication does not concern gravure printing. The special problems which arise when clamping gravure printing plates onto a cylinder are not addressed in US Pat. No. 3,191,532; there is also no indication of their solution. Rather, the method for mounting printing plates on cylinders shown in US Pat. No. 3,191,532 is unsuitable for gravure printing.
Auch wenn bereits viele Versuche unternommen worden sind, Druckformen zu schaffen, die keine Stoßstellen aufweisen und dennoch leicht und einfach auf dem Zylinder-Grundkörper zu befestigen sind, ist es bis heute nicht gelungen, durch Aufspannen einer Tiefdruckplatte auf einen Spannzylinder eine spaltfreie Druckform zu erhalten. Vielmehr muß bis jetzt immer noch zur Vermeidung des Abdruckes der Spalt nachträglich, beispielsweise durch einen gesonderten Kunststoffstreifen, verschlossen werden.Even if many attempts have already been made to create printing forms that have no joints and are nevertheless easy and simple to attach to the cylinder base body, it has not yet been possible to obtain a gap-free printing form by clamping a gravure printing plate onto a clamping cylinder . Rather, the gap must still be closed subsequently, for example by a separate plastic strip, in order to avoid the impression.
Der vorliegenden Erfindung lag die Aufgabe zugrunde, in einfacher Weise eine Tiefdruckplatte mit Kunststoff-Druckschicht herzustellen, die sich leicht und problemlos auf Tiefdruck-Spannzylinder ohne Bildung eines störenden Spaltes aufspannen läßt.The present invention was based on the object of producing in a simple manner an intaglio printing plate with a plastic printing layer which can be easily and easily clamped onto intaglio clamping cylinders without the formation of an annoying gap.
Es wurde nun überraschend gefunden, daß sich solche Tiefdruckplatten einfach herstellen lassen, wenn man bei einer Tiefdruckplatte die polymere Druckschicht, die haftfest auf einem dimensionsstabilen, biegsamen Träger aufgebracht ist, in den Bereichen der Tiefdruckplatte vom Träger entfernt, die zum Befestigen der Platte auf dem Spannzylinder dienen und hierzu umgekantet werden müssen.It has now surprisingly been found that such intaglio printing plates can be produced simply if, in the case of an intaglio printing plate, the polymeric printing layer, which is adherently attached to a dimensionally stable, flexible support, is removed from the support in the areas of the intaglio printing plate which are used to secure the plate to the Serve clamping cylinders and must be folded over for this.
Gegenstand der Erfindung ist demzufolge ein Verfahren zur Herstellung von Tiefdruckplatten mit einer auf einem dimensionsstabilen, biegsamen Träger aufgebrachten polymeren Druckschicht zum Aufspannen auf einen Tiefdruck-Spannzylinder, welches dadurch gekennzeichnet ist, daß man die polymere Druckschicht auf den zum Aufspannen umzukantenden Bereichen des Trägers entfernt.The invention accordingly relates to a method for producing intaglio printing plates with a polymeric printing layer applied to a dimensionally stable, flexible support for mounting on an intaglio clamping cylinder, which is characterized in that the polymeric printing layer is removed from the areas of the support to be edged for mounting.
Gegenstand der Erfindung sind weiterhin die so hergestellten, zum Aufspannen auf einen Spannzylinder geeigneten Tiefdruckplatten, bei welchen der Träger in den zum Aufspannen umzukantenden Bereichen frei von der polymeren Druckschicht ist. Gegenstand der Erfindung sind weiterhin spezielle Ausgestaltungsformen des Verfahrens und der Tiefdruckplatten gemäß der nachfolgenden Beschreibung.The invention further relates to the gravure printing plates produced in this way, suitable for clamping onto a clamping cylinder, in which the support is free of the polymeric printing layer in the areas to be folded over for clamping. The invention furthermore relates to special embodiments of the method and the intaglio printing plates as described below.
Die erfindungsgemäßen Tiefdruckplatten lassen sich leicht und problemlos auf den gebräuchlichen Tiefdruck-Spannzylindern befestigen. Durch das erfindungsgemäße Entfernen der polymeren Druckschicht vom Träger in den Bereichen der Druckplatte, die zur Befestigung der Druckplatte im Spannzylinder umgekantet werden, erstreckt sich bei diesen Tiefdruckplatten die polymere Druckschicht nur über die tatsächliche, dem Zylinderumfang entsprechende eingentliche Druckfläche. Im Gegensatz zu den herkömmlichen Tiefdruckplatten, bei denen sich die polymere Druckschicht über die gesamte Länge der druckplatte erstreckt und dementsprechend beim Aufspannen auf einen Spannzylinder mit umgekantet und in den Zylinderspalt eingeführt wird,The rotogravure plates according to the invention can be easily and easily attached to the conventional rotogravure clamping cylinders. By removing the polymeric printing layer from the support according to the invention in the areas of the printing plate which are folded over for fastening the printing plate in the tensioning cylinder, the polymeric printing layer in these intaglio printing plates extends only over the actual printing surface corresponding to the cylinder circumference. In contrast to conventional intaglio printing plates, in which the polymeric printing layer extends over the entire length of the printing plate and is accordingly folded over onto a tensioning cylinder and inserted into the cylinder gap,
wobei sich an der Stoßstelle stets ein Spalt in der druckenden Oberfläche ausbildet, werden beim Aufspannen der erfindungsgemäßen Druckplatten die Kanten der polymeren Druckschicht fest und bündig gegeneinander gestoßen und gepreßt, so daß eine nahezu stoßstellenfreie Oberfläche ohne störenden Spalt, der sich beim Druck abbildet, entsteht.whereby a gap is always formed in the printing surface at the joint, the edges of the polymeric printing layer are firmly and flush butted and pressed against one another when the printing plates according to the invention are clamped, so that an almost joint-free surface is formed without an annoying gap which is formed during printing .
Es hat sich dabei als vorteilhaft erweisen, wenn bei den erfindungsgemäßen Tiefdruckplatten die polymere Druckschicht eine Schichtdicke im Bereich von etwa 100 bis 500 ....m besitzt, da dann ein besonders guter Spaltverschluß erzielt wird. Bei den erfindungsgemäßen Tiefdruckplatten kann die über die Breite der Druckplatte verlaufende Umkantungslinie zwar senkrecht zu den Längsseiten der Druckplatte und somit nach dem Aufspannen parallel zu der Zylinderachse verlaufen ; in einer besonderen Ausgestaltungsform verlaufen diese Umkantungslinien, bis zu denen die polymere Druckschicht vom Träger entfernt wird, jedoch etwas schräg zur Zylinderachse, d. h. nicht genau senkrecht zu den Längsseiten der Druckplatte.It has proven to be advantageous if, in the case of the intaglio printing plates according to the invention, the polymeric printing layer has a layer thickness in the range from approximately 100 to 500 .mu.m, since a particularly good gap seal is then achieved. In the case of the intaglio printing plates according to the invention, the edging line running across the width of the printing plate can run perpendicular to the longitudinal sides of the printing plate and thus, after clamping, parallel to the cylinder axis; In a special embodiment, these fold lines, up to which the polymeric printing layer is removed from the carrier, run somewhat obliquely to the cylinder axis, i. H. not exactly perpendicular to the long sides of the pressure plate.
Als Träger für die erfindungsgemäßen Tiefdruckplatten können die an sich üblichen und bekannten dimensionsstabilen und biegsamen Trägermaterialien dienen, insbesondere plattenförmig Stahl- oder Aluminiumbleche, aber gegebenenfalls auch geeignete Kunststoffolien. Die polymere Druckschicht, die haftfest beispielsweise mittels eines geeigneten Haftvermittlers auf dem Träger aufgebracht ist, kann eine einfache Kunststoffschicht sein, wie sie z. B. in der DE-OS 27 52 500 beschrieben ist, in die die farbaufnehmenden Vertiefungen mechanisch eingraviert sind. Bevorzugt ist diese Druckschicht jedoch eine photopolymere Schicht, die durch bildmäßiges Belichten und Entwickeln einer photopolymerisierbaren Schicht einer Mischung von einem polymeren Bindemittel, damit verträglichen photopolymerisierbaren, ethylenisch ungesättigten Monomeren und/oder Oligomeren und einem Photoinitiator erzeugt worden ist (vgl. DE-OS 20 54 833, DE-OS 20 61 287, DE-OS 3 128 949 und DE-OS 31 28 951The supports for the rotogravure plates according to the invention which are known and known per se are dimensionally stable and flexible support materials, in particular plate-shaped steel or aluminum sheets, but also, if appropriate, suitable plastic films. The polymeric printing layer, which is applied adherently to the carrier, for example by means of a suitable adhesion promoter, can be a simple plastic layer, such as is used for. B. is described in DE-OS 27 52 500, in which the ink-receiving recesses are mechanically engraved. However, this printing layer is preferably a photopolymeric layer which has been produced by imagewise exposure and development of a photopolymerizable layer of a mixture of a polymeric binder, photopolymerizable, ethylenically unsaturated monomers and / or oligomers and a photoinitiator compatible therewith (cf. DE-OS 20 54 833, DE-OS 20 61 287, DE-OS 3 128 949 and DE-OS 31 28 951
Das Entfernen der polymeren Druckschicht von den zum Befestigen auf dem Spannzylinder umzukantenden Bereichen des Trägers wird vorteilhaft vor dem eigentlichen Umkanten vorgenommen und kann beispielsweise mechanisch durch Spänen, Fräsen oder Gravieren erfolgen.The removal of the polymeric printing layer from the areas of the carrier that are to be folded over for fastening on the tensioning cylinder is advantageously carried out before the actual folding and can be done mechanically, for example, by cutting, milling or engraving.
Besonders leicht und einfach, insbesondere mit der erforderlichen Genauigkeit und Präzision, können die erfindungsgemäßen Tiefdruckplatten hergestellt werden, wenn man von einem lichtempfindlichen Aufzeichnungsmaterial mit einer auf einem dimensionsstabilen, biegsamen Träger haftfest aufgebrachten photopolymerisierbaren Schicht der oben erwähnten und beschriebenen Art ausgeht. Als sehr vorteilhaft haben sich dabei die lichtempfindlichen Aufzeichnungsmaterialien erwiesen, wie sie in der DE-OS 31 28 949 beschrieben sind, auf die wegen Einzelheiten zur Zusammensetzung dieser Aufzeichnungsmaterialien sowie zur Herstellung von Tiefdruckformen hieraus verwiesen wird.The rotogravure plates according to the invention can be produced particularly easily and simply, in particular with the required accuracy and precision, if one starts from a light-sensitive recording material with a photopolymerizable layer of the type mentioned and described above adhered to a dimensionally stable, flexible support. The photosensitive recording materials as described in DE-OS 31 28 949, to which reference is made here for details on the composition of these recording materials and on the production of gravure forms, have proven to be very advantageous.
Die erfindungsgemäßen Tiefdruckplatten werden mittels dieser lichtempfindlichen Aufzeichnungsmaterialien hergestellt, indem in an sich bekannter Weise die photopolymerisierbare Schicht zur Erzeugung der Druckschicht durch eine geeignete Vorlage, z. B. durch ein Raster-oder Strich-Positiv oder ein Halbton-Positiv mit einer Führungsraster-Vorlage, bildmäßig mit aktinischem Licht belichtet wird und unter Ausbildung der Raster- und Näpfchenstruktur die unbelichteten Anteile der Schicht mit Hilfe einer geeigneten Entwickler-Flüssigkeit, in der die unbelichteten Anteile, nicht aber die belichteten Anteile der Schicht löslich sind, ausgewaschen und entfernt werden. In einer bevorzugten, weil sehr einfachen Ausführungsform dieses Verfahrens wird die Belichtung der photopolymerisierbaren Schicht so durchgeführt, daß die photopolymerisierbare Schicht in den später zum Aufspannen der Druckplatte umzukantenden bereichen unbelichtet bleibt, so daß die photopolymere Schicht in diesen Bereichen beim Auswaschen mit der Entwickler-Flüssigkeit gleichzeitig mit den übrigen unbelichteten Anteilen dieser Schicht mit entfernt wird. Um die erforderliche Präzision und Paßgenauigkeit zu gewährleisten, wird in dieser Ausführungsform des erfindungsgemäßen Verfahrens die Belichtung der photopolymerisierbaren Schicht vorzugsweise über ein Register vorgenommen. Man erhält so direkt eine erfindungsgemäße Tiefdruckplatte, bei der die zum Aufspannen auf den Spannzylinder umzukantenden Bereiche des Trägers frei von der polymeren Druckschicht sind.The intaglio printing plates according to the invention are produced by means of these light-sensitive recording materials by, in a manner known per se, the photopolymerizable layer for producing the printing layer by means of a suitable template, e.g. B. by a raster or line positive or a halftone positive with a guide raster template, imagewise exposed to actinic light and the unexposed portions of the layer using a suitable developer liquid in the formation of the raster and cell structure the unexposed portions, but not the exposed portions of the layer, are soluble, washed out and removed. In a preferred, because very simple embodiment of this method, the exposure of the photopolymerizable layer is carried out in such a way that the photopolymerizable layer remains unexposed in the areas which are later to be folded over for clamping the printing plate, so that the photopolymeric layer in these areas is washed out with the developer liquid is removed at the same time as the remaining unexposed portions of this layer. In order to ensure the required precision and accuracy of fit, in this embodiment of the method according to the invention the exposure of the photopolymerizable layer is preferably carried out via a register. An intaglio printing plate according to the invention is thus obtained directly, in which the areas of the support to be folded over for clamping onto the tensioning cylinder are free of the polymeric printing layer.
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823221206 DE3221206A1 (en) | 1982-06-04 | 1982-06-04 | LOW PRINT PLATE FOR CLAMPING ON A LOW PRINT CLAMPING CYLINDER AND METHOD FOR THEIR PRODUCTION |
| DE3221206 | 1982-06-04 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0096275A2 EP0096275A2 (en) | 1983-12-21 |
| EP0096275A3 EP0096275A3 (en) | 1986-03-12 |
| EP0096275B1 true EP0096275B1 (en) | 1988-07-27 |
Family
ID=6165379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83105073A Expired EP0096275B1 (en) | 1982-06-04 | 1983-05-21 | Gravure printing plate to be clamped on a clamping cylinder, and process for its production |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0096275B1 (en) |
| JP (1) | JPS58224795A (en) |
| DE (2) | DE3221206A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1231223B (en) * | 1987-09-11 | 1991-11-26 | Cerutti Spa Off Mec | METHOD FOR JOINING THE ENDS OF A SHEET FOR ROTARY PRINTING AND JOINTING SO OBTAINED |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2285116A (en) * | 1938-10-12 | 1942-06-02 | Interchem Corp | Printing plate |
| US3191532A (en) * | 1963-12-26 | 1965-06-29 | Miehle Goss Dexter Inc | Plate clamping mechanism for rotary printing press |
| US3413706A (en) * | 1964-05-11 | 1968-12-03 | Paper Converting Machine Co | Printing plate preparation |
| DE2003325A1 (en) * | 1970-01-26 | 1971-08-19 | Leo Heinrichson | Method and device for correcting photosensitive plates, films or sheets |
| US3765329A (en) * | 1971-09-28 | 1973-10-16 | A Kirkpatrick | Cylinder cover fastening devices |
| US3973496A (en) * | 1973-10-29 | 1976-08-10 | Ball Corporation | Apparatus for mounting and locking printing plates |
-
1982
- 1982-06-04 DE DE19823221206 patent/DE3221206A1/en not_active Withdrawn
-
1983
- 1983-05-21 EP EP83105073A patent/EP0096275B1/en not_active Expired
- 1983-05-21 DE DE8383105073T patent/DE3377481D1/en not_active Expired
- 1983-06-01 JP JP58095861A patent/JPS58224795A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58224795A (en) | 1983-12-27 |
| EP0096275A2 (en) | 1983-12-21 |
| JPH0249640B2 (en) | 1990-10-30 |
| DE3377481D1 (en) | 1988-09-01 |
| DE3221206A1 (en) | 1983-12-08 |
| EP0096275A3 (en) | 1986-03-12 |
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