EP0588091A1 - Foil as covering for an impression cylinder of a sheet-fed offset rotary perfecting press - Google Patents
Foil as covering for an impression cylinder of a sheet-fed offset rotary perfecting press Download PDFInfo
- Publication number
- EP0588091A1 EP0588091A1 EP93113247A EP93113247A EP0588091A1 EP 0588091 A1 EP0588091 A1 EP 0588091A1 EP 93113247 A EP93113247 A EP 93113247A EP 93113247 A EP93113247 A EP 93113247A EP 0588091 A1 EP0588091 A1 EP 0588091A1
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- European Patent Office
- Prior art keywords
- convex
- structural elements
- sheet
- film
- concave
- 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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Classifications
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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
- B41N7/00—Shells for rollers of printing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F22/00—Means preventing smudging of machine parts or printed articles
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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
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12389—All metal or with adjacent metals having variation in thickness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
- Y10T428/12854—Next to Co-, Fe-, or Ni-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12993—Surface feature [e.g., rough, mirror]
Definitions
- the invention relates to a film as an elevator for an impression cylinder of an offset sheet-fed rotary printing machine for perfecting and printing, according to the preamble of patent claim 1.
- Such a film is known from EP 0 017 776 B1.
- nickel, chromium-nickel steel or a plastic with a high modulus of elasticity is provided as the carrier layer, and a chromium layer which compensates for the micro-roughness is located on this carrier layer.
- the carrier layer has a surface, known from DE 24 46 188 C3, of statistically uniform, but irregularly distributed, convex and concave structural elements, the concave structural elements being designed in the form of spherical caps, so that the arc is supported on the poles of these spherical caps.
- the ink release behavior of the sheet surface of the impression cylinder guiding the sheet is considerably improved compared to previously known designs.
- the film not only prevents smear marks in face printing after the sheet is turned, but also improves the print quality of the reverse printing.
- the improvement was essentially attributed to the formation of the surfaces supporting the bow as a spherical cap, because the spherical shape encourages the removal of the assumed color.
- the chrome plating of the film already leads to good ink release behavior in the start-up time and is also easier to wash than the initially somewhat rougher carrier layer.
- the very hard chrome layer extends the life of the sheet guiding the sheet, so that practically also the good Color release behavior of the film is preserved over its life.
- an arc-guiding foil made of nickel is known as an elevator for the impression cylinder of rotary printing presses for perfecting, one surface of which is smooth and the opposite surface of which is provided with statistically uniformly distributed, equally high spherical caps.
- This metal foil is made from nickel using a galvanic impression process using a negative mold.
- the first foils molded in such a negative form are relatively smooth. However, the more foils that are produced, the more micro-roughness occurs on the structured surface. On the other hand, it was observed that such films showed reduced ink release behavior after start-up in the start-up phase. The optimal ink delivery behavior was only achieved after long use of the elevator in the machine.
- the invention solves this problem by means of the training features according to claim 1.
- a special form of realizing the features of the invention accordingly also provides that the convex elements of the spherical structure have the shape of an ice tip in the optical enlargement.
- a film of a conventional type is retained, for example a film exchange for orders in a changed print pattern, for example up to 120 lines per cm.
- the mold for the galvanic molding of the surface structure or the film according to the invention can be produced by means of galvanic techniques by etching or else by laser engraving.
- the manufacturing process of the film is not influenced by the features of the invention.
- the sheet 1 guiding or supporting the sheet on the circumference of the impression cylinder of a printing press is made of nickel, chromium-nickel steel or plastic. It has a thickness of approximately 0.2 to 0.4 mm.
- the surface of the film 1 is composed of statistically uniformly distributed convex and concave structural elements, the convex structural elements 2 being designed as domes which are approximately at the same height with their poles. On these poles of the tops 2, the arch is supported on the impression cylinder.
- the Height of the dome 2 compared to the concave structure is about 0.03 to 0.04 mm.
- On the left edge of the picture in FIG. 1, the color splitting is symbolically illustrated when the sheet is lifted off a crest 2.
- the convex structural elements 2 according to the invention allow a larger space for receiving color than the known spherical caps. This favorable space distribution also favors the removal of deposited paint, ie the film is easier and faster to wash.
- FIG. 2 shows the same film 1, but without color guidance.
- the convex structural elements 2 have an oval shape, in which the radius of curvature from the pole 4 to the transition 5 into the concave structural elements 6 increases continuously. In a special embodiment, this results in the shape of the tip of an egg 7, which is only shown for clarity in FIG. 2, in particular a chicken egg, the greatest length of which is determined by the tip of the pole 4 and the rear side 8 of the film. It follows from this that the radius of curvature of the convex structural elements, which are determined by the ice tip, increases continuously from the pole to the transition into the concave structural elements 6.
- the tips of the poles 4 of the convex structural elements 2 are at the same height.
- the latter are distributed statistically as uniformly as possible, albeit irregularly, in a known manner.
- the convex structural elements 2 merge directly into the concave structural elements 6, so that the convex structural elements 2 are narrower than in the known arrangement according to FIG. 1
- the resulting, relatively close arrangement of the convex structural elements is shown in FIG. 3.
- FIG. 4 shows the arrangement of a film 1 as described above on a double-sized impression cylinder 9 of an offset sheet-fed printing machine in reverse printing after the sheet has been turned by the two cylinders 10 and 15.
- the sheet 13 printed in face printing in the printing nip between the blanket cylinder 11 and a double-sized counter-pressure cylinder 12 is fed to the storage cylinder 10 by the transfer cylinder 14 and then transported in the printing nip between the blanket cylinder 16 and the counter-pressure cylinder 9 through the turning cylinder 15.
Abstract
Description
Die Erfindung betrifft eine Folie als Aufzug für einen Gegendruckzylinder einer Offset-Bogen-Rotationsdruckmaschine zum Schön- und Widerdruck nach dem Oberbegriff des Patentanspruches 1.The invention relates to a film as an elevator for an impression cylinder of an offset sheet-fed rotary printing machine for perfecting and printing, according to the preamble of
Eine solche Folie ist aus der EP 0 017 776 B1 bekannt. Als Trägerschicht ist hiernach Nickel, Chromnickelstahl oder ein Kunststoff mit hohem Elastizitätsmodul vorgesehen, und auf dieser Trägerschicht befindet sich eine die Mikrorauhheit ausgleichende Chromschicht. Die Trägerschicht weist eine aus der DE 24 46 188 C3 bekannte Oberfläche aus statistisch gleichmäßig, aber unregelmäßig verteilten, konvexen und konkaven Strukturelementen auf, wobei die konkaven Strukturelemente kugelkalottenförmig ausgebildet sind, so daß sich der Bogen auf den Polen dieser Kugelkalotten abstützt. Mit einer solchen, auf den Gegendruckzylinder aufgezogenen Folie - häufig als Antischmierfolie bezeichnet - wird das Farbabgabeverhalten der den Bogen führenden Mantelfläche des Gegendruckzylinders gegenüber früher bekannten Ausbildungen erheblich verbessert. Die Folie verhindert nicht nur Abschmiererscheinungen in Schöndruck nach der Bogenwendung, sondern verbessert auch die Druckqualität des Widerdrucks. In Verbindung mit dem Werkstoff der Trägerschicht wurde die Verbesserung wesentlich auf die Ausbildung der den Bogen tragenden Flächen als Kugelkalotte zurückgeführt, weil die Kugelform das Abziehen angenommener Farbe begünstigt. Die Verchromung der Folie führt bereits in der Anfahrzeit zu einem guten Farbabgabeverhalten und läßt sich auch leichter waschen als die anfangs etwas rauhere Trägerschicht. Die sehr harte Chromschicht verlängert die Lebensdauer der den Bogen führenden Folie, so daß praktisch auch das gute Farbabgabeverhalten der Folie über deren Lebensdauer hinweg erhalten bleibt.Such a film is known from EP 0 017 776 B1. According to this, nickel, chromium-nickel steel or a plastic with a high modulus of elasticity is provided as the carrier layer, and a chromium layer which compensates for the micro-roughness is located on this carrier layer. The carrier layer has a surface, known from DE 24 46 188 C3, of statistically uniform, but irregularly distributed, convex and concave structural elements, the concave structural elements being designed in the form of spherical caps, so that the arc is supported on the poles of these spherical caps. With such a film, which is drawn onto the impression cylinder - frequently referred to as anti-lubrication film - the ink release behavior of the sheet surface of the impression cylinder guiding the sheet is considerably improved compared to previously known designs. The film not only prevents smear marks in face printing after the sheet is turned, but also improves the print quality of the reverse printing. In connection with the material of the carrier layer, the improvement was essentially attributed to the formation of the surfaces supporting the bow as a spherical cap, because the spherical shape encourages the removal of the assumed color. The chrome plating of the film already leads to good ink release behavior in the start-up time and is also easier to wash than the initially somewhat rougher carrier layer. The very hard chrome layer extends the life of the sheet guiding the sheet, so that practically also the good Color release behavior of the film is preserved over its life.
Andere Vorschläge zur Verbesserung des Farbabgabeverhaltens eines Druckzylinders einer Offset-Bogen-Rotationsdruckmaschine für den Schön- und Widerdruck haben das Ergebnis der Folie gemäß EP 0 017 776 B1 nicht erreichen können. So ist es aus der DE 28 20 549 A1 bekannt, auf die sandgestrahlte Oberfläche einer Trägerschicht aus Aluminium oder Kupfer eine dünne Nickelschicht mit einer Hartnickelauflage aufzubringen. Anstelle dieser Nickelschicht soll gemäß der DE 12 58 873 B1 eine Chromschicht aufgebracht sein. Eine das Farbabgabeverhalten verbessernde Wirkung bleibt jedoch hinter der Wirkung einer Folie gemäß EP 0 017 776 B1 zurück.Other suggestions for improving the ink delivery behavior of a printing cylinder of an offset sheet-fed rotary printing machine for face and reverse printing have not been able to achieve the result of the film according to EP 0 017 776 B1. It is known from DE 28 20 549 A1 to apply a thin nickel layer with a hard nickel coating to the sandblasted surface of a support layer made of aluminum or copper. Instead of this nickel layer, a chrome layer should be applied according to
Aus einer Firmendruckschrift mit dem Titel "Der Zylinderaufzug wird reformiert" der Firma Minnesota Mining & Manufacturing Co. GmbH., Düsseldorf, Immermannstraße 40, ist ein Deckbogen für den Gegendruckzylinder einer Rollendruckmaschine aus einer starken Hanfpapierunterlage mit einer Kunstharzbeschichtung und einem darin gehaltenen Pulver aus mikroskopisch kleinen Glaskugeln bekannt. Mit dieser Anordnung wird bei: Bedrucken von Bahnen im Schön- und Widerdruck ebenfalls durch eine Oberflächenstruktur aus Kugelkalotten eine Annäherung an Ergebnisse der Verwendung einer Folie nach EP 0 017 776 B1 angestrebt.From a company publication entitled "The cylinder lift is being reformed" by Minnesota Mining & Manufacturing Co. GmbH., Duesseldorf, Immermannstrasse 40, is a cover sheet for the impression cylinder of a web printing press made of a strong hemp paper base with a synthetic resin coating and a microscopic powder contained therein known small glass balls. With this arrangement, in the case of printing webs in face and back printing, also by means of a surface structure made of spherical caps, an attempt is made to approximate the results of using a film according to EP 0 017 776 B1.
Aus der FR-A-2 283 995 ist eine bogenführende Folie aus Nickel als Aufzug für den Gegendruckzylinder von Rotationsdruckmaschinen für den Schön- und Widerdruck bekannt, deren eine Fläche glatt ausgebildet und deren gegenüberliegende Fläche mit statistisch gleichmäßig verteilten, gleich hohen Kugelkalotten versehen ist. Diese Metallfolie wird nach dem Verfahren der galvanoplastischen Abformung mit Hilfe einer Negativform aus Nickel hergestellt.From FR-A-2 283 995 an arc-guiding foil made of nickel is known as an elevator for the impression cylinder of rotary printing presses for perfecting, one surface of which is smooth and the opposite surface of which is provided with statistically uniformly distributed, equally high spherical caps. This metal foil is made from nickel using a galvanic impression process using a negative mold.
Die ersten in einer solchen Negativform abgeformten Folien sind relativ glatt. Je mehr Folien jedoch produziert werden, desto stärker stellt sich auf der strukturierten Oberfläche eine Mikrorauhheit ein. Andererseits wurde beobachtet, daß solche Folien nach Inbetriebnahme in der Anlaufphase ein gemindertes Farbabgabeverhalten zeigten. Erst nach längerem Gebrauch des Aufzuges in der Maschine wurde das optimale Farbabgabeverhalten erreicht.The first foils molded in such a negative form are relatively smooth. However, the more foils that are produced, the more micro-roughness occurs on the structured surface. On the other hand, it was observed that such films showed reduced ink release behavior after start-up in the start-up phase. The optimal ink delivery behavior was only achieved after long use of the elevator in the machine.
Es ist Aufgabe der Erfindung, eine Verbesserung der drucktechnischen Eigenschaften einer Folie nach dem Oberbegriff im Hinblick auf eine Qualitätssteigerung des Druckergebnisses im Schön- und Widerdruck, vor allem beim Mehrfarbendruck und beim Druck mit kleinem Rastermaß, unter Aufrechterhaltung aller bisher bekannten Vorteile zu erreichen.It is an object of the invention to achieve an improvement in the printing properties of a film according to the preamble with regard to an increase in the quality of the printing result in perfecting, especially in multi-color printing and in printing with a small grid size, while maintaining all previously known advantages.
Diese Aufgabe löst die Erfindung durch die Ausbildungsmerkmale nach dem Patentanspruch 1.The invention solves this problem by means of the training features according to
Erreicht wird dadurch eine erhebliche Begünstigung des Farbabgabeverhaltens, welches zu einer deutlich sichtbaren Qualitätsverbesserung des Druckes, vor allem bei matten Papieren, dünneren Papieren und bei kleinere: Raster im Bereich 80 - 100 Linien pro cm, führt. Ermöglicht wird durch die neue Formgebung ein engerer Tragpunktabstand bei gleicher Gegendruckfläche, so daß die spezifische Pressung pro Kuppe verringert wird. Durch Schleifen der Folie auf der Rückseite lassen sich sehr genaue Dicken in äußerst engen Toleranzgrenzen erzielen, so daß die Folie insbesondere auch für doppeltgroße Druckzylinder im Schön- und Widerdruck ohne Trocknung geeignet ist.This achieves a significant advantage in the ink release behavior, which leads to a clearly visible improvement in the quality of the print, especially with matt papers, thinner papers and with smaller: rasters in the range of 80 - 100 lines per cm. The new design enables a closer support point distance with the same counter pressure surface, so that the specific pressure per tip is reduced. By grinding the film on the back, very precise thicknesses can be achieved within extremely narrow tolerance limits, so that the film is particularly suitable for double-size printing cylinders in perfecting without drying.
Eine deutlich erkennbare Qualitätssteigerung des Druckbildes im Schön- und Widerdruck und bei heute stark nachgefragten Acht-Farben-Druckmaschinen im Einsatz 4/4 läßt sich in Verbindung mit einer gemeinsamen Feineinstellung der Pressung im Druckspalt über eine elektronische Rechnersteuerung nach der Bogenwendung in Abhängigkeit von der Papierqualität und der Druckform erreichen.A clearly noticeable increase in the quality of the printed image in face and reverse printing and in today's eight-color printing presses in
Wesentlich für die Vorteile ist die der Spitzenform eines Hühnereis oder dergleichen angenäherte Kontur der konvexen Strukturelemente, die alle auf gleicher Höhe liegen und ein gezieltes und differenziertes Farbabgabeverhalten ergeben. Vorteilhaft ist die Möglichkeit der Anordnung der Tragpunkte in größerer Dichte als bisher, so daß die Tragpunkte enger stehen als bei Kugelkalottenformen und bei gleicher Gegendruckfläche mit einer geringeren Flächenpressung gearbeitet werden kann.What is essential for the advantages is the contour of the convex structural elements which approximates the tip shape of a chicken egg or the like, all of which are at the same height and result in a targeted and differentiated color-giving behavior. The possibility of arranging the support points with greater density than before is advantageous, so that the support points are narrower than with spherical cap shapes and can be worked with a lower surface pressure with the same counter pressure surface.
Eine besondere Form der Realisierung der Erfindungsmerkmale sieht dementsprechend auch vor, daß die konvexen Elemente der Kalottenstruktur in der optischen Vergrößerung die Form einer Eispitze aufweisen.A special form of realizing the features of the invention accordingly also provides that the convex elements of the spherical structure have the shape of an ice tip in the optical enlargement.
Erhalten bleiben in jedem Falle die bei Folien aus einer Trägerschicht aus z.B. Nickel und einer Chromschicht bekannten und genutzten Vorteile, insbesondere die Austauschbarkeit der Folie, um durch Auswahl der Folie, zum Beispiel unterschiedlicher Dicke oder unterschiedlicher Noppenstruktur, eine Voranpassung an die zu bedruckende Papierqualität und an die Druckform durchzuführen, und auch die Option eines Austausches gegen eine Folie herkömmlicher Art erhalten bleibt, zum Beispiel ein Folientausch bei Aufträgen in einem veränderten Druckraster, zum Beispiel bis 120 Linien pro cm.In any case, those of films made from a carrier layer made of e.g. Known and used advantages of nickel and a chrome layer, in particular the interchangeability of the film, in order to carry out a pre-adjustment to the paper quality to be printed and the printing form by selecting the film, for example different thicknesses or different nub structure, and also the option of an exchange for one A film of a conventional type is retained, for example a film exchange for orders in a changed print pattern, for example up to 120 lines per cm.
Der Einsatz einer dem Druckauftrag entsprechenden Folie bezüglich der Struktur kann gegebenenfalls im Schnellaustausch mit Hilfe einer automatischen Folienwechselvorrichtung besonders effektiv erzielt werden.The use of a film corresponding to the print order with regard to the structure can, if appropriate, be achieved particularly effectively in a rapid exchange using an automatic film changing device.
Die Herstellung der Form zur galvanischen Abformung der Oberflächenstruktur bzw. der Folie nach der Erfindung kann mittels galvanischer Techniken durch Ätzen oder auch durch Lasergravur erfolgen. Das Herstellungsverfahren der Folie wird durch die Erfindungsmerkmale nicht beeinflußt.The mold for the galvanic molding of the surface structure or the film according to the invention can be produced by means of galvanic techniques by etching or else by laser engraving. The manufacturing process of the film is not influenced by the features of the invention.
Zur weiteren Erläuterung der Erfindung wird nunmehr auf die Zeichnung Bezug genommen, in der die Erfindung graphisch dargestellt ist. Es zeigen:
Figur 1- in einem vergrößerten Maßstab einen Schnitt durch eine Farbe tragende Folie nach der Erfindung,
Figur 2- einen Schnitt entsprechend
Figur 1 und im gleichen Maßstab durch eine Folie gemäß der Erfindung ohne Farbführung, Figur 3- Draufsicht auf einen Ausschnitt der Folie gemäß
Figur 2 mit der strukturierten Oberfläche und Figur 4- schematisch und in einem wesentlich kleineren Maßstab als in den vorhergehenden Figuren die Anordnung der Folie auf dem Gegendruckzylinder in einer Druckmaschine für den Schön- und Widerdruck.
- Figure 1
- on an enlarged scale a section through a color-bearing film according to the invention,
- Figure 2
- 2 shows a section corresponding to FIG. 1 and on the same scale through a film according to the invention without color guidance,
- Figure 3
- Top view of a section of the film according to FIG. 2 with the structured surface and
- Figure 4
- schematically and on a much smaller scale than in the previous figures, the arrangement of the film on the impression cylinder in a printing press for perfecting.
Die den Bogen am Umfange des Gegendruckzylinders einer Druckmaschine führende bzw. tragende Folie 1 besteht aus Nickel, Chromnickelstahl oder Kunststoff. Sie weist eine Dicke von ca. 0,2 bis 0,4 mm auf. Die Oberfläche der Folie 1 setzt sich aus statistisch gleichmäßig verteilten konvexen und konkaven Strukturelementen zusammen, wobei die konvexen Strukturelemente 2 als Kuppen ausgebildet sind, die mit ihren Polen etwa auf gleicher Höhe liegen. Auf diesen Polen der Kuppen 2 stutzt sich der Bogen am Gegendruckzylinder ab. Die Höhe der Kuppe 2 gegenüber der konkaven Struktur beträgt etwa 0,03 bis 0,04 mm. Am linken Bildrand in Figur 1 ist die Farbspaltung beim Abheben des Bogens von einer Kuppe 2 symbolisch veranschaulicht. Die in Figur 1 eingezeichneten Kreise 3 veranschaulichen die Form von Kugelkalotten bekannter Ausführungen, um dadurch die Unterschiede der erfindungsgemäßen Ausbildung gegenüber dem Stande der Technik hervorzuheben. Die erfindungsgemäßen konvexen Strukturelemente 2 ermöglichen einen größeren Zwischenraum zur Aufnahme von Farbe als die bekannten Kugelkalotten. Diese günstige Raumaufteilung begünstigt auch das Entfernen von abgelagerter Farbe, d. h. die Folie ist einfacher und schneller zu waschen.The
Die Figur 2 zeigt die gleiche Folie 1, jedoch ohne Farbführung. Die konvexen Strukturelemente 2 weisen eine ovale Form auf, bei der der Krümmungsradius vom Pol 4 zum übergang 5 in die konkaven Strukturelemente 6 stetig größer wird. Dadurch ergibt sich bei einer besonderen Ausführungsform in der optischen Vergrößerung die Form der Spitze eines in der Figur 2 lediglich zur Verdeutlichung eingezeichneten Eis 7, insbesondere eines Hühnereis, dessen größte Länge durch die Spitze des Pols 4 und die Rückseite 8 der Folie bestimmt wird. Daraus folgt, daß der Krümmungsradius der konvexen Strukturelemente, die durch die Eispitze bestimmt werden, vom Pol zum übergang in die konkaven Strukturelemente 6 stetig größer wird.FIG. 2 shows the
Auch bei dieser Anordnung liegen die Spitzen der Pole 4 der konvexen Strukturelemente 2 auf gleicher Höhe. Letztere sind in bekannter Weise statistisch möglichst gleichmäßig verteilt, wenn auch unregelmäßig angeordnet. In einer bevorzugten Ausbildung gehen die konvexen Strukturelemente 2 unmittelbar in die konkaven Strukturelemente 6 über, so daß die konvexen Strukturelemente 2 enger stehen als bei der bekannten Anordnung entsprechend Figur 1. Die sich daraus ergebende, relativ enge Anordnung der konvexen Strukturelemente ist in der Figur 3 dargestellt. In Abkehr von der bisherigen Auffassung, daß eine Kugelform die Farbspaltung bei der Ablösung des Bogens vom Gegendruckzylinder begünstigt, wurde herausgefunden, daß die ovale Form gemäß der Erfindung mit einem zur Polspitze hin stetig kleiner werdenden Krümmungsradius der konvexen Strukturelemente eine wesentliche Verbesserung der Farbspaltung ergibt, die eine erkennbare Verbesserung der Druckqualität mit sich bringt. Durch die kleinere Tragfläche der Kuppen 2 gegenüber den Kugelkalotten reduziert sich auch die Farbführung, so daß der Folgebogen weniger Farbe abtragen muß. Der Farbweitertransport wird dadurch sicherer.In this arrangement, too, the tips of the
In Figur 4 ist die Anordnung einer Folie 1 entsprechend der vorstehenden Beschreibung auf einem doppeltgroßen Gegendruckzylinder 9 einer Offset-Bogendruckmaschine im Widerdruck nach der Bogenwendung durch die beiden Zylinder 10 und 15 dargestellt. Der im Druckspalt zwischen dem Gummituchzylinder 11 und einem doppeltgroßen Gegendruckzyllnder 12 im Schöndruck bedruckte Bogen 13 wird durch den Umführzyllnder 14 dem Speicherzylinder 10 zugeführt und dann gewendet durch den Wendezylinder 15 in den Druckspalt zwischen dem Gummituchzylinder 16 und dem Gegendruckzylinder 9 transportiert.FIG. 4 shows the arrangement of a
- 11
- Foliefoil
- 22nd
- Strukturelement (Kuppe)Structural element (dome)
- 33rd
- Kreis einer KugelkalotteCircle of a spherical cap
- 44th
- Pol (Polspitze)Pole (pole tip)
- 55
- übergangcrossing
- 66
- konkave Strukturconcave structure
- 77
- EiformEgg shape
- 88th
- Rückseiteback
- 99
- GegendruckzylinderImpression cylinder
- 1010th
- SpeicherzylinderStorage cylinder
- 1111
- GummituchzylinderBlanket cylinder
- 1212th
- Gegendruckzylinder vor der WendungImpression cylinder before the turn
- 1313
- Bogenarc
- 1414
- umführzylindertransfer cylinder
- 1515
- WendezylinderTurning cylinder
- 1616
- GummituchzylinderBlanket cylinder
Claims (4)
dadurch gekennzeichnet,
daß die konvexen Strukturelemente (2) eine ovale Form mit einem vom Pol (4) zum übergang (5) in die konkaven Strukturelemente (6) größer werdenden Krümmungsradius aufweisen.Foil as a lift for a impression cylinder of an offset sheet-fed rotary printing machine for perfecting, consisting of an unyielding, chemically resistant and wear-resistant carrier layer with good ink delivery behavior and with a surface made of a spherical structure with statistically evenly distributed, convex and concave structural elements and out a chromium layer thereon, which forms the surface of the counter-pressure cylinder which guides the arc and reduces the micro-roughness, the arc being supported on the poles of the convex structural elements,
characterized by
that the convex structural elements (2) have an oval shape with a radius of curvature that increases from the pole (4) to the transition (5) into the concave structural elements (6).
dadurch gekennzeichnet,
daß die konvexen Strukturelemente (2) der Kalottenstruktur in der optischen Vergrößerung die Form einer Eispitze aufweist.Film according to claim 1,
characterized by
that the convex structural elements (2) of the spherical structure have the shape of an ice tip in the optical enlargement.
dadurch gekennzeichnet,
daß die konvexen und die konkaven Strukturelemente (2, 6) unmittelbar ineinander übergehen.Film according to claims 1 and 2,
characterized by
that the convex and concave structural elements (2, 6) merge directly into one another.
dadurch gekennzeichnet,
daß entsprechend dem zu erledigenden Druckauftrag eine Folie mit günstigem Verhältnis von Kuppe zu Tal bzw. von konvexen zu konkaven Strukturelementen (2, 6) zum Einsatz kommt.Use of a film according to claims 1 to 3,
characterized by
that a film with a favorable ratio of dome to valley or from convex to concave structural elements (2, 6) is used in accordance with the print job to be carried out.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4230567 | 1992-09-12 | ||
| DE4230567A DE4230567C2 (en) | 1992-09-12 | 1992-09-12 | Foil as elevator for an impression cylinder of an offset sheet-fed rotary printing press for perfecting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0588091A1 true EP0588091A1 (en) | 1994-03-23 |
| EP0588091B1 EP0588091B1 (en) | 1996-03-13 |
Family
ID=6467816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93113247A Expired - Lifetime EP0588091B1 (en) | 1992-09-12 | 1993-08-19 | Foil as covering for an impression cylinder of a sheet-fed offset rotary perfecting press |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5397651A (en) |
| EP (1) | EP0588091B1 (en) |
| JP (1) | JP2703717B2 (en) |
| CN (1) | CN1030973C (en) |
| AT (1) | ATE135289T1 (en) |
| CA (1) | CA2077871C (en) |
| DE (2) | DE4230567C2 (en) |
| HK (1) | HK2197A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0718100A1 (en) * | 1994-12-20 | 1996-06-26 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for applying a spacing-substance on a printing sheet and sheet printing press provided for carrying out such a method |
| FR2775474A1 (en) * | 1998-02-27 | 1999-09-03 | Heidelberger Druckmasch Ag | PAPER STRIP GUIDE ROLL |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19607037C2 (en) * | 1996-02-24 | 1999-03-25 | Roland Man Druckmasch | Process for cleaning a printing press cylinder surface with a surface structure |
| US5981084A (en) * | 1996-03-20 | 1999-11-09 | Metal Technology, Inc. | Electrolytic process for cleaning electrically conducting surfaces and product thereof |
| DE19745763A1 (en) * | 1997-10-16 | 1999-04-22 | Heidelberger Druckmasch Ag | Transport drum in rotary printing machines |
| DE20107183U1 (en) | 2001-04-26 | 2001-07-05 | Roland Man Druckmasch | Elevator for a sheet guiding cylinder in a processing machine |
| CN100434271C (en) * | 2001-07-23 | 2008-11-19 | 三菱重工业株式会社 | Single-sheet conveying printing machine |
| DE10346659B3 (en) * | 2003-09-10 | 2004-11-18 | Janko Despot | Cleaning device for cylindrical surface in printing press using rotating brush roller with oval cross-section bristle set having bristles of high elasticity and lesser elasticity in alternating zones in peripheral direction |
| JP2008132721A (en) * | 2006-11-29 | 2008-06-12 | Nitto Denko Corp | Cushioning sheet for printing apparatus, printing apparatus and printing method |
| US8462391B2 (en) * | 2009-03-13 | 2013-06-11 | Heidelberger Druckmaschinen Ag | Method for producing a pseudo-stochastic master surface, master surface, method for producing a cylinder cover, cylinder cover, machine processing printing material, method for producing printed products and method for microstamping printing products |
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|---|---|---|---|---|
| US2011181A (en) * | 1932-12-14 | 1935-08-13 | Carborundum Co | Method for preventing offset in printing |
| US3308522A (en) * | 1962-12-14 | 1967-03-14 | Velcro Corp | Anti-offset roll |
| US3874331A (en) * | 1971-01-18 | 1975-04-01 | Gaf Corp | Apparatus for applying liquid to a web |
| FR2286715A2 (en) * | 1974-10-01 | 1976-04-30 | Meudec Alain | Printing roller with textile fibre coating - has elastic binder holding fibres of specified parameters |
| US4005654A (en) * | 1971-12-14 | 1977-02-01 | Xerox Corporation | Process for shallow relief printing |
| 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 |
| EP0486841A1 (en) * | 1990-11-14 | 1992-05-27 | Heidelberger Druckmaschinen Aktiengesellschaft | Printing cylinder with multiple diameters |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US487121A (en) * | 1892-11-29 | Mulleb | ||
| DE486841C (en) * | 1925-06-18 | 1929-11-26 | Aeg | Coal combustion with an ash hopper |
| US2064322A (en) * | 1933-10-11 | 1936-12-15 | Western Electric Co | Method of surface finishing articles |
| US2221890A (en) * | 1937-11-23 | 1940-11-19 | Certain Teed Prod Corp | Pebbled surface |
| FR956760A (en) * | 1943-04-19 | 1950-02-07 | ||
| FR955065A (en) * | 1947-01-13 | 1950-01-07 | ||
| US3261288A (en) * | 1964-06-08 | 1966-07-19 | Henry R Dickerson | Antismear jacket for transfer drum |
| DE2446188C3 (en) * | 1974-09-27 | 1983-11-24 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Sheet-guiding outer surface of impression cylinders or sheet transfer cylinders in rotary offset printing machines |
| GB2081178A (en) * | 1980-07-29 | 1982-02-17 | Heidelberger Druckmasch Ag | Sheet-guiding Foil as a Dressing for Back Pressure Cylinders |
| DE3422443C2 (en) * | 1984-06-16 | 1989-11-23 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Foil for sheet-guiding cylinders and drums in rotary offset printing machines |
-
1992
- 1992-09-12 DE DE4230567A patent/DE4230567C2/en not_active Expired - Fee Related
-
1993
- 1993-07-06 CA CA002077871A patent/CA2077871C/en not_active Expired - Fee Related
- 1993-08-19 EP EP93113247A patent/EP0588091B1/en not_active Expired - Lifetime
- 1993-08-19 AT AT93113247T patent/ATE135289T1/en active
- 1993-08-19 DE DE59301871T patent/DE59301871D1/en not_active Expired - Lifetime
- 1993-09-02 CN CN93109743A patent/CN1030973C/en not_active Expired - Fee Related
- 1993-09-10 JP JP5225767A patent/JP2703717B2/en not_active Expired - Fee Related
- 1993-09-13 US US08/121,046 patent/US5397651A/en not_active Expired - Lifetime
-
1997
- 1997-01-02 HK HK2197A patent/HK2197A/en not_active IP Right Cessation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2011181A (en) * | 1932-12-14 | 1935-08-13 | Carborundum Co | Method for preventing offset in printing |
| US3308522A (en) * | 1962-12-14 | 1967-03-14 | Velcro Corp | Anti-offset roll |
| US3874331A (en) * | 1971-01-18 | 1975-04-01 | Gaf Corp | Apparatus for applying liquid to a web |
| US4005654A (en) * | 1971-12-14 | 1977-02-01 | Xerox Corporation | Process for shallow relief printing |
| FR2286715A2 (en) * | 1974-10-01 | 1976-04-30 | Meudec Alain | Printing roller with textile fibre coating - has elastic binder holding fibres of specified parameters |
| 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 |
| EP0486841A1 (en) * | 1990-11-14 | 1992-05-27 | Heidelberger Druckmaschinen Aktiengesellschaft | Printing cylinder with multiple diameters |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0718100A1 (en) * | 1994-12-20 | 1996-06-26 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for applying a spacing-substance on a printing sheet and sheet printing press provided for carrying out such a method |
| US5797326A (en) * | 1994-12-20 | 1998-08-25 | Heidelberger Druckmaschinen Ag | Method for applying spacing material to a printed sheet of paper, and a sheet-fed printing press equipped for performing the method |
| FR2775474A1 (en) * | 1998-02-27 | 1999-09-03 | Heidelberger Druckmasch Ag | PAPER STRIP GUIDE ROLL |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1085162A (en) | 1994-04-13 |
| ATE135289T1 (en) | 1996-03-15 |
| DE4230567A1 (en) | 1994-03-17 |
| DE4230567C2 (en) | 1994-06-30 |
| US5397651A (en) | 1995-03-14 |
| JP2703717B2 (en) | 1998-01-26 |
| EP0588091B1 (en) | 1996-03-13 |
| CA2077871C (en) | 1999-07-06 |
| CN1030973C (en) | 1996-02-14 |
| DE59301871D1 (en) | 1996-04-18 |
| CA2077871A1 (en) | 1994-03-13 |
| HK2197A (en) | 1997-01-10 |
| JPH06183173A (en) | 1994-07-05 |
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