EP1466727B1 - Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression - Google Patents

Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression Download PDF

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Publication number
EP1466727B1
EP1466727B1 EP03008351A EP03008351A EP1466727B1 EP 1466727 B1 EP1466727 B1 EP 1466727B1 EP 03008351 A EP03008351 A EP 03008351A EP 03008351 A EP03008351 A EP 03008351A EP 1466727 B1 EP1466727 B1 EP 1466727B1
Authority
EP
European Patent Office
Prior art keywords
text
image
engraving
support screen
support grid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03008351A
Other languages
German (de)
English (en)
Other versions
EP1466727A1 (fr
Inventor
Ernst Rudolf Dr. Weidlich
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.)
Hell Gravure Systems GmbH and Co KG
Original Assignee
Hell Gravure Systems GmbH and Co KG
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 Hell Gravure Systems GmbH and Co KG filed Critical Hell Gravure Systems GmbH and Co KG
Priority to EP03008351A priority Critical patent/EP1466727B1/fr
Priority to DE50310151T priority patent/DE50310151D1/de
Priority to AT03008351T priority patent/ATE401194T1/de
Priority to JP2003150831A priority patent/JP2004314583A/ja
Priority to CN03138408.0A priority patent/CN1273290C/zh
Publication of EP1466727A1 publication Critical patent/EP1466727A1/fr
Application granted granted Critical
Publication of EP1466727B1 publication Critical patent/EP1466727B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal

Definitions

  • the invention relates to a method for engraving printing cylinders for gravure printing with an electronic engraving machine, according to the preamble of claim 1.
  • support grids are also engraved. These support grids have the task of binding the printing ink locally during the printing process. If these support grid were not provided, the ink would extend beyond the engraving areas, in particular in the case of deep engravings. This bleeding of the printing ink occurs all the more, the deeper and larger the text and / or image engravings are.
  • a separate support grid is often formed, which is not formed as in the vibratory engraving by the grid arrangement of the local wells, but must be applied separately when using the line engraving said support grid.
  • the supporting grid has the same effects both in vibration engraving and in line engraving, namely to prevent the printing ink from extending beyond the engraved areas.
  • the support grid are on the printing cylinder with a defined mesh size, which is constant before. This means that, for example, text or text which has been engraved is also traversed by the support grid, that is, to remain in this example, even the font to be engraved has a support grid, which would thus equally apply to the image. This means that as a result, the support points of the support grid are again constantly spaced from each other. If the distance chosen is small, although the vernikhus is improved, the volume advantages are mitigated, however, especially if finely tapered, thin logos are to be engraved or printed. If, on the other hand, the distance is chosen to be large, there is a poorer printability, especially in areas of large-area lettering.
  • the DE 101 16 250 A1 discloses a method of performing line engraving for gravure printing.
  • a support pad for the Squeegee and / or to prevent the bending of the substrate in this pool a support grid or grid islands to stand and to save when engraving.
  • the DE 101 32 599 A1 discloses a method for signal processing of engraving data for the engraving of printing cylinders, in which an engraving element with an engraving stylus controlled by an engraving stylus as a cutting tool axially on a moves along rotating printing cylinder and engraving line arranged in a printing grid arranged wells cut into the printing cylinder.
  • the DE 101 32 599 A1 deals in particular with the problem that fine line elements of text are reproduced in different widths depending on the density value of the background and proposes to solve this problem to form a density difference between the background density and the text density and the density values of lying on a text outline and / or to correct the text contour of adjacent pixels as a function of the density difference.
  • a correction of the density values means that shallower and smaller or deeper and larger wells are engraved in these areas, for example by narrowing a positive bar element with shallower and smaller wells or by rendering a negative bar element with deeper and larger wells wider.
  • the object is achieved according to the invention in that the support grid with respect to at least the width of the cells or meshes depending on the shape and / or size of the text and / or image data on the printing cylinder is variably fixed.
  • the advantage of the solution according to the invention consists essentially in the fact that the support grid can now be adapted so flexibly to the engraving data, i. the distance of the support points of the support grid is selectable and executable in an engraving on the printing cylinder, that the support grid is always the actual engraving data or images and texts in the best possible way able to cover.
  • the support grid can change according to the present boundary conditions of the font, but also of images, with regard to at least the size of the text and / or the images.
  • Fine writings of a text are not torn by the support grid.
  • the support grid has an arbitrary selectable direction relative to the text and / or image.
  • a parameter determining the orientation of the support grid can be the type of text or image to be engraved or printed. For certain text and / or image types, different orientations of the support grid can be selected.
  • the distance of the webs of the support grid from each other is kept substantially constant in the presence of large-scale text and / or image areas. In such a case, therefore, a static support grid is preferred.
  • the distance between the webs should be fixed, in order, for example, to achieve the desired printing density.
  • the support grid which regularly has square, rectangular or rhombic-shaped cells is selected in a still further advantageous embodiment of the method such that the course of the main axes of the Support grid relative to the text and / or image is indeed arbitrary, but preferably selected such that a major axis perpendicular to the text and / or image.
  • Such a course is extremely useful in certain provided with the printing cylinder support grids, if in a later printing process very high print densities are to be achieved.
  • a major axis is at an acute angle to the text and / or image, i. the main axes of the support grid would wrap around the impression cylinder, as it were, analogous to a helix.
  • the support grid is formed into the edge area of negative text and / or image, ie that in this case, for example, the actual contour areas of a font or a Textes but also of a picture are not occupied with the Sützraster, whereby a so-called.
  • Outlining the edges of the font or image is achieved, both in the case of positive and negative font and also positive and negative image.
  • the support grid is preferably determined in the edge region of the text and / or the image with respect to at least its size different from that of the remaining area of the text and / or the image, it is preferably achieved that in the region of finely tapered areas of fonts and images, the support grid does not have as much influence as in large areas. This means that in these areas the support grid has less influence on the later printing process. This may e.g. be realized by a change in the density of the support grid.
  • the support grid it is also possible for the support grid to completely exclude at least the contour regions of the text and / or the image, which is possible in the case of positive as well as negative writing or text but also in images, and thus an outlining in the edge area of the font or text of the picture.
  • the depth of the engraving of the support grid have a certain amount, which corresponds to a density between the density of the surface and the density of the data to be engraved. For this reason, it may be extremely advantageous to set the depth of the engraving of the support grid in dependence on the data provided for the engraving of the text and / or the image variable, ie by means of this measure, the density would be freely parameterizable and could the later printing process with the According to the invention occupied with the support grid pressure cylinder can be adjusted.
  • both the geometry and the density of the webs of the support grid can be adapted to the geometry of the font and its density.
  • Fig. 1 indicates the use of a static support grid 10 Printing cylinders in a cutout.
  • This static support grid 10 corresponds to the support grids, as they have been used in the prior art. This clearly gives rise to two disadvantages.
  • the support grid 10 runs on the one hand in the negative writing and even with positive writings, the support grid 10 is not optimal, see. Picture right and picture left.
  • the actual support grid 10 extends here, for example, helically around the impression cylinder, in both directions.
  • the reference numeral 11 designates the periodically repeating webs of the support grid 10.
  • the support grid here form in both examples square, approximately square fields or mesh.
  • Out Fig. 2 is clearly visible that the support grid 10 in the immediate vicinity of the negative font, cf. the image on the right, is not executed, which outlining the negative font is achieved. In addition, a much better reproduction of the negative font gem.
  • Fig. 2 by a contouring against the corresponding font of Fig. 1 visible and also a better object-related separation of the positive font gem.
  • Fig. 2 left picture, opposite to the positive font acc. Fig. 1 , left picture.
  • the support grid 10 is according to the invention in terms of at least its size depending on the text and / or or image data is set variably. This variability can relate to the support grid 10 forming webs 11 and the support points, but also on the density of the support grid at any selected locations of the printing cylinder and can be formed there according to desired specifications depending on the text and / or image data variable.
  • the field or the mesh size of the support grid 10 may be formed differently wide over the entire pressure cylinder and, as in Fig. 2 seen, right picture, not be trained, ie completely missing.
  • This in Fig. 2 illustrated embodiment is expressly to be regarded only as a way of aligning the major axes.
  • any suitable angles of the support grid can be selected, depending on the text and image data available for engraving the text and / or the image and depending on further parameters such as the print density and the printing ink for the later printing.
  • the positions of the support grid can be so dynamic that they can differ from letter to letter in their arrangement to the text or image dataset and in their density with each other.
  • this font may be outlining which is advantageous for their reproduction.
  • the overlay of the support grid can be done on the source dataset or the engraving dataset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (12)

  1. Procédé de gravure de lignes sur des cylindres d'impression pour l'impression en creux à l'aide d'une machine de gravure électronique pour graver des textes et/ou des images sur un cylindre d'impression à partir de données de textes et/ou d'images, et sur au moins une partie du cylindre d'impression, on grave en plus une trame de support, particulière, qui comprend des nervures à des intervalles périodiques et des mailles ou des cellules régulières, carrées, rectangulaires ou en losange, délimitées par les nervures,
    caractérisé en ce que
    la trame de support (10) est fixée de manière variable sur des parties différentes du cylindre d'impression par rapport à au moins la largeur des cellules ou des mailles en fonction de la forme et/ou de la taille des données de textes et/ou d'images sur le cylindre d'impression.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les nervures (11) qui forment la trame de support (10) sont fixées de manière variable notamment quant à leur intervalle les unes des autres en fonction des données de textes et/ou d'images.
  3. Procédé selon l'une ou les revendications 1 ou 2,
    caractérisé en ce que
    la trame de support (10) a une direction choisie de façon quelconque par rapport au texte et/ou à l'image.
  4. Procédé selon l'une ou plusieurs des revendications 1 à 3,
    caractérisé en ce que
    l'alignement des axes principaux de la trame de support, défini par l'alignement des nervures (11) est choisi librement par rapport au texte et/ ou à l'image.
  5. Procédé selon la revendication 4,
    caractérisé en ce qu'
    un axe principal est perpendiculaire au texte et/ou à l'image.
  6. Procédé selon la revendication 5,
    caractérisé en ce qu'
    un axe principal fait un angle aigu par rapport au texte et/ou à l'image.
  7. Procédé selon l'une ou plusieurs des revendications 1 à 6,
    caractérisé en ce que
    la trame de support (10) est réalisée jusque dans la zone du bord (12) négatif du texte et/ou de l'image.
  8. Procédé selon la revendication 7,
    caractérisé en ce que
    la trame de support (10) est fixée dans la zone de bord du texte et/ou de l'image par rapport au moins à sa taille, différemment de la partie restante du texte et/ou de l'image.
  9. Procédé selon l'une ou plusieurs des revendications 1 à 8,
    caractérisé en ce que
    la trame de support (10) exclut au moins les zones de contour du texte et/ou de l'image.
  10. Procédé selon l'une ou plusieurs des revendications 1 à 9,
    caractérisé en ce que
    la profondeur de la gravure de la trame de support (10) est fixée en fonction des données fournies pour la gravure du texte et/ou de l'image.
  11. Procédé selon l'une ou plusieurs des revendications 1 à 10,
    caractérisé en ce que
    la densité de la trame de support (10) est choisie en fonction de l'écriture du texte et de sa densité.
  12. Procédé selon la revendication 11,
    caractérisé en ce que
    la densité de la trame de support (10) dans la zone de bord (12) de l'écriture du texte est choisie différente de la zone centrale (13) de la partie écrite.
EP03008351A 2003-04-10 2003-04-10 Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression Expired - Lifetime EP1466727B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03008351A EP1466727B1 (fr) 2003-04-10 2003-04-10 Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression
DE50310151T DE50310151D1 (de) 2003-04-10 2003-04-10 Verfahren zur Gravur von Texten und/oder Bildern sowie eines Stützrasters auf Druckzylindern
AT03008351T ATE401194T1 (de) 2003-04-10 2003-04-10 Verfahren zur gravur von texten und/oder bildern sowie eines stützrasters auf druckzylindern
JP2003150831A JP2004314583A (ja) 2003-04-10 2003-05-28 電子グラビア印刷機による凹版印刷のための版胴の彫刻のための方法
CN03138408.0A CN1273290C (zh) 2003-04-10 2003-05-30 在印刷滚筒上雕刻文字和/或插图及支持网屏的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03008351A EP1466727B1 (fr) 2003-04-10 2003-04-10 Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression

Publications (2)

Publication Number Publication Date
EP1466727A1 EP1466727A1 (fr) 2004-10-13
EP1466727B1 true EP1466727B1 (fr) 2008-07-16

Family

ID=32864989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03008351A Expired - Lifetime EP1466727B1 (fr) 2003-04-10 2003-04-10 Procédé pour la gravure des textes et/ou des images ainsi qu'un trame de support sur des cylindres d'impression

Country Status (5)

Country Link
EP (1) EP1466727B1 (fr)
JP (1) JP2004314583A (fr)
CN (1) CN1273290C (fr)
AT (1) ATE401194T1 (fr)
DE (1) DE50310151D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103287058B (zh) * 2012-02-24 2015-03-04 上海运青制版有限公司 一种电雕扎边工艺

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116250A1 (de) * 2001-03-31 2002-10-24 Heidelberger Druckmasch Ag Verfahren zur Durchführung einer Liniengravur für den Tiefdruck
DE10132599A1 (de) * 2001-07-05 2003-01-23 Heidelberger Druckmasch Ag Verfahren zur Signalverarbeitung von Gravurdaten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BAUFELDT U.: "Informationen Übertragen und drucken", VERLAG BERUF + SCHULE, ITZEHOE *

Also Published As

Publication number Publication date
CN1535817A (zh) 2004-10-13
CN1273290C (zh) 2006-09-06
EP1466727A1 (fr) 2004-10-13
JP2004314583A (ja) 2004-11-11
ATE401194T1 (de) 2008-08-15
DE50310151D1 (de) 2008-08-28

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