EP1568490A1 - Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure - Google Patents

Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure Download PDF

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Publication number
EP1568490A1
EP1568490A1 EP04004470A EP04004470A EP1568490A1 EP 1568490 A1 EP1568490 A1 EP 1568490A1 EP 04004470 A EP04004470 A EP 04004470A EP 04004470 A EP04004470 A EP 04004470A EP 1568490 A1 EP1568490 A1 EP 1568490A1
Authority
EP
European Patent Office
Prior art keywords
engraving
pixels
depth
printing
pixel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04004470A
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German (de)
English (en)
Other versions
EP1568490B1 (fr
Inventor
Siegfried Dr. Beisswenger
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
Priority to AT04004470T priority Critical patent/ATE369977T1/de
Application filed by Hell Gravure Systems GmbH and Co KG filed Critical Hell Gravure Systems GmbH and Co KG
Priority to ES04004470T priority patent/ES2293109T3/es
Priority to EP04004470A priority patent/EP1568490B1/fr
Priority to DE502004004634T priority patent/DE502004004634D1/de
Priority to JP2004105735A priority patent/JP2005238812A/ja
Priority to CNB2004100350904A priority patent/CN100421932C/zh
Priority to US10/895,555 priority patent/US20050188868A1/en
Publication of EP1568490A1 publication Critical patent/EP1568490A1/fr
Application granted granted Critical
Publication of EP1568490B1 publication Critical patent/EP1568490B1/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
    • 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
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam

Definitions

  • the invention relates to a method for direct engraving of cups for receiving printing inks in the surface of gravure printing cylinders.
  • a variant of the implementation of the information of printing image on the printing cylinder during gravure printing is the so-called Laser mask exposure of a previously on the printing cylinder applied thin thermal or Photosensitive mask layer followed by etching.
  • the mask is removed by means of a fine laser beam or she is exposed in the places where one or no cup should be etched. Then done cleaning with thermal mask or developing and washing out in photosensitive mask the Mask surface and then followed by the etching the exposed elements of the copper surface.
  • the wells in the mask layer also only created area variable are, i. they can only be in number and arrangement the composition of the surface elements vary. The means that a different depth variation of the individual wells is not possible because all wells etched the same depth over the etching process.
  • a "halftone image" (half tone image) must be generated in which the desired gray value is converted into a bit structure for the respective screen or printing mesh ( Bitmap) is implemented.
  • RIP raster image processor
  • the gravure based on the laser mask coating has certain disadvantages, because in the Mask can, as mentioned, only surface variable written and the third dimension, i. the cup depth, is the same for all well sizes and is characterized by the same Process, namely the etching formed. It has It has been shown that this method also leads to quality limitations at the printed reproduction of the picture leads. In addition, the repeatability of the etching is subject Limitations and it shows up when playing back Halftone gradients that in particular in the field of large Brightness (light) does not achieve a smooth tonal curve becomes.
  • the object is achieved according to the invention in that the engraving process is carried out such that the wells from a predetermined number of engraved pixels be formed.
  • the method according to the invention are the Tiefticiannäpfchen, unlike the method according to the Laser mask coating, as with engraving with the help of the conventional engraving technique for the Gravure, directly into the engraving surface of the Engraved printing cylinder.
  • the method can be achieved by means of existing engraving systems for engraving printing cylinders for gravure printing in principle, so that the method also in already in use, existing engraving can be used.
  • the engraving depth of the pixels differently formable that is, the pixel volumes and thus the Well volumes can be selected by different Engraving depth of the individual pixels can be varied.
  • the engraving depth of the pixels may preferably at same extent of the surface element of the pixel be formed differently, that is, it is according to the invention the engraving depth of the pixel no longer correlates with the two-dimensional extent of the surface element of the pixel. It follows that the data that in the inventive method drive used engraving tool, not, as in the Laser mask exposure, coded in a so-called "bitmap" are. Rather, it is possible according to the invention that everyone single pixel deeply engraved in a predefined way should be able to.
  • the engraving depth may preferably be in stepped depth steps but it is in principle also possible that the engraving depth by analog control set or controlled the engraving tool becomes.
  • the depth steps are optionally 1 resolved to 8 bits, preferably 8 bits, so that maximum 255 different depths can be engraved. It is but also possible, the depth resolution only with 2 bit too encode, so that, for example, four depth positions possible are like full depth, medium depth, small depth and no engraving. But there are also other depth patterns than 2 bit possible.
  • the engraving width per grid mesh can also be built up step by step. So it may be advantageous that a cup consists of at least one pixel and maximum 255 pixels, that is, the pattern of Pixels that make up the cup can go from 1 to 255 Increase pixels.
  • the two-dimensional surface element of the pixel is preferably variably adjustable with respect to its areal extent, the areal extent advantageously being in the range of 10 to 20 ⁇ m .
  • the size of the areal extent of the surface element of the pixel that is, the size of the area of the pixel on the surface of the printing form to be engraved, can be used depending on the engraving process Engraving agent can be selected.
  • the invention advantageously makes it possible that the engraving process is carried out such that Railnäpfchen formed of a predetermined number of pixels can be, so that in particular contours of text and images in the subsequent printing extremely sharply rendered can be.
  • the training of Sectionnäpfchen was previously only in the method of the method the laser mask exposure in limited form possible or in offset printing with all the usual ones These known printing method prevailing disadvantages.
  • any suitable engraving means or engraving tools to use.
  • Fig. 1 In which the Principle of the formation of wells in a printing cylinder by a conventional art known in the art Engraving process is shown. From the whole Pressure cylinder is an example of a small area selected, consisting of 4 different sized wells consists.
  • the actual engraving agent is here usually a shaped as Engierstichel accordingly Diamond.
  • This known engraving method for The printing cylinder used in gravure is becoming common designated with electromagnetic engraving and is the Professional world long been known, so that on the description the control of the engraving agent to form the Cups not to be further discussed here needs.
  • a special feature of the electromagnetic engraving produced wells is that due the solid geometry of the engraving stylus the depth and the diameter, i. the extent 14, in Fig. 1 by way of example based on the diagonal of a cup 10, to the engraving depth 12 in a certain fixed ratio stand.
  • the scored by electromagnetic engraving Printing form is called semi-autotypic gravure, since the wells 10 in their extension 14 and in their engraving depth 12 are variable, but always in one fixed relationship to each other, only by different trained engraving tools, for example. By a different cut of a diamond stylus, can be changed during the actual engraving process but always firm.
  • Another special feature of electromechanical engraving is also that due to the used in gravure printing low-viscosity ink full tone contours (text and Line content) in basically the same print grid Wells as the images (image content) are rendered, in the one chosen for the respective color Printed screen. As a result, there is a certain degree of gravure Blur for contours (text and line contents).
  • this Method or this method is also the experts It has been known for a long time, cf. Figs. 2a and 2b, in contrast to electromechanical engraving, Particles 15 form what is both for the area the contour 18 as well as the picture applies.
  • the laser mask exposure and subsequent etching be sharper contours 18 compared to the with the electromechanical engraving of 10 wells achieved Contours reached 18, not with the relatively strong in Appearance passing "sawtooth effect", for example by means of Diamond stylus engraved contours 18 (text and Line contents) are afflicted.
  • Fig. 3 shows an example by means of the method of Laser mask exposure trained, made of a plurality formed by pixels surface variable halftone dot 20, which in its entirety said well 10 form. Since the laser light writing beam 19 at this known method can only say "yes” or “no", that is, remove the mask previously applied to the printing cylinder or can leave, so can do so trained wells can only be created variable in area.
  • the engraving depth 12 is common to all wells 10 Equal to the etching process.
  • a trained in a grid 17 according to the invention Cup 10 is shown schematically in FIG.
  • the process is carried out in such a way that means the engraving process, the wells 10 by a suitable Engraving agent that is an electro-mechanical engraver but also laser light can be from a predetermined Number of pixels 11 were formed, i.e., the actual well 10 becomes active during the engraving process from a predetermined number of pixels 11, also called pixels formed.
  • a suitable Engraving agent that is an electro-mechanical engraver but also laser light can be from a predetermined Number of pixels 11 were formed, i.e., the actual well 10 becomes active during the engraving process from a predetermined number of pixels 11, also called pixels formed.
  • the process can be conducted so that each well 10, depending on the preset tonal values of the printable Image, from an arbitrary number of pixels 11 can be composed, wherein a cup 10 at least consists of a pixel 11 and maximum the number of pixels 11 due to the program-related Raster ist be desired, for example, 255 pixels.
  • gravure mesh becomes a grid in 255 steps corresponding to 1 byte resolved, so that the formation of the wells 10 by 255 different Pattern of pixels 11 a meaningful number or relationship represents.
  • the engraving depths are 12 the centrally arranged pixels 11, the darkest appear, at the deepest, the central area surrounding pixels 11 are on the other hand less deep formed and the outer, surrounding pixels are formed in an even smaller depth, here, for example. formed in the form of a predetermined fixed depth grid, eg represented by 2 bits. So could, for example. the full depth, the middle depth, the shallow depth and no engraving follow the bit code 11, 10, 01 and 00. It should be noted that also preferably finer depth levels than with 2 bit realized feasible can be, for example an 8 bit deep depth graduation.
  • this high number represents more than 1000 adjustable Values of the pixels 11 per well 10 one Overdetermination, but in the printing practice by is canceled, because of engraving and printing technology View certain pixels 11 of the pixel pattern be withdrawn in their engraving depth 12, so a smooth expression of gradients is possible.
  • Figs. 5a and 5b are formed such that there by the method according to the invention also sectionnäpfchen 15 from a predetermined number of pixels 11 can be formed. This will achieve that as well Contours 18 can be played as sharp as it was previously only possible with offset printing, but with all the advantages of gravure over the Offset printing.
  • the extent 14 of the surface element 13 of the pixel 11, cf. also to Fig. 1, the training of Well 10 by conventional electromechanical Engraving can also be variably adjustable and can be made dependent on the actual engraver
  • laser light 16 can be.
  • the engraver in shape is used by laser light 16
  • the through a grid of the engraving grid represented printing density, where the grid
  • the grid For example, has a resolution of 70 lines / cm, from a Halftone image with a higher resolution, e.g. with 120 Lines / cm, interpolated, so that an additional Information exists, namely how the density within a Gravurrastermasche is approximately distributed.
  • This information can be used for targeted relocation of the entire Pattern of the pixels 11, that is composed of these Well 10, can be used.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP04004470A 2004-02-27 2004-02-27 Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure Expired - Lifetime EP1568490B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES04004470T ES2293109T3 (es) 2004-02-27 2004-02-27 Procedimiento para el grabado de alveolos para la recepcion de tintas de imprenta para impresion de huecograbado.
EP04004470A EP1568490B1 (fr) 2004-02-27 2004-02-27 Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure
DE502004004634T DE502004004634D1 (de) 2004-02-27 2004-02-27 Verfahren zur direkten Gravur von Näpfchen zur Aufnahme von Druckfarbe für den Tiefdruck
AT04004470T ATE369977T1 (de) 2004-02-27 2004-02-27 Verfahren zur direkten gravur von näpfchen zur aufnahme von druckfarbe für den tiefdruck
JP2004105735A JP2005238812A (ja) 2004-02-27 2004-03-31 印刷インクを溜めるためにグラビア印刷用に限定された圧胴の表面に直接セルを彫刻する方法
CNB2004100350904A CN100421932C (zh) 2004-02-27 2004-04-23 直接雕刻容纳凹版印刷油墨的小凹槽的方法
US10/895,555 US20050188868A1 (en) 2004-02-27 2004-07-21 Method for direct engraving of cups to accept the printing ink for rotogravure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04004470A EP1568490B1 (fr) 2004-02-27 2004-02-27 Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure

Publications (2)

Publication Number Publication Date
EP1568490A1 true EP1568490A1 (fr) 2005-08-31
EP1568490B1 EP1568490B1 (fr) 2007-08-15

Family

ID=34745916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04004470A Expired - Lifetime EP1568490B1 (fr) 2004-02-27 2004-02-27 Procédé de gravure directe des cellules pour recevoir l'encre en rotogravure

Country Status (7)

Country Link
US (1) US20050188868A1 (fr)
EP (1) EP1568490B1 (fr)
JP (1) JP2005238812A (fr)
CN (1) CN100421932C (fr)
AT (1) ATE369977T1 (fr)
DE (1) DE502004004634D1 (fr)
ES (1) ES2293109T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007029099A1 (de) * 2007-06-21 2008-12-24 Hell Gravure Systems Gmbh & Co. Kg Verfahren und Vorrichtung zur Bebilderung einer Tiefdruckform und so bebilderte Tiefdruckform
EP2006090A3 (fr) * 2007-06-20 2009-10-21 HELL Gravure Systems GmbH & Co. KG Procédé et dispositif pour former des images sur des plaques d'impression en creux et plaques d'impression en creux ainsi obtenues
EP2151324A2 (fr) 2008-07-28 2010-02-10 Prinovis Dresden GmbH & Co. KG Procédé de fabrication d'un moule d'impression rotatif pour l'utilisation dans un procédé d'impression par rotation de rouleaux
EP2305464A1 (fr) * 2009-09-30 2011-04-06 Ernst-Rudolf Dr. Weidlich Procédé de gravure d'une surface, une surface d'un moule d'impression pour l'impression en profondeur et une surface réalisée selon ce procédé
WO2012119704A1 (fr) 2011-03-09 2012-09-13 Hell Gravure Systems Gmbh & Co. Kg Procédé et dispositif d'usinage d'un cylindre, en particulier d'un cylindre d'impression ou d'estampage

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840926B4 (de) * 1998-09-08 2013-07-11 Hell Gravure Systems Gmbh & Co. Kg Anordnung zur Materialbearbeitung mittels Laserstrahlen und deren Verwendung
ATE404378T1 (de) * 2005-05-03 2008-08-15 Merck Patent Gmbh Verwendung von lasergravierten druckformen
CL2010000884A1 (es) 2010-08-19 2011-02-18 Andres Bienzobas Saffie Fernando Metodo de impresion en dos dimensiones en un soporte de impresion en tres dimensiones, que comprende proveer un soporte de impresion, rellenar unos medios de soporte del soporte de impresion con un medio colorante, esperar que el medio colorante se seque, y cortar transversalmente de manera paralela la cara de impresion en una pluralidad de lonjas; y un bloque de impresion.
DE102011017080B4 (de) 2011-04-14 2016-02-18 Hell Gravure Systems Gmbh & Co. Kg Verfahren zur Bearbeitung eines Werkstücks mit Laserstrahl
CN104050845A (zh) * 2014-01-21 2014-09-17 刘卓韬 一种快速练写好汉字毛笔笔画教具及制造方法
CN104943339B (zh) * 2015-06-04 2018-01-12 上海希尔彩印制版有限公司 一种电子雕刻凹版上胶方法
CN111016475B (zh) * 2019-12-08 2021-06-15 南京林业大学 实地凹版六边形网穴结构的油墨用量预测方法
CN111016474B (zh) * 2019-12-08 2021-06-18 南京林业大学 实地凹版方形网穴结构的油墨用量预测方法
CN111016476B (zh) * 2019-12-08 2021-06-15 南京林业大学 实地凹版抱枕形网穴结构的油墨用量预测方法
CN111098616B (zh) * 2019-12-08 2021-06-15 南京林业大学 实地凹版菱形网穴结构的油墨用量预测方法
KR102629696B1 (ko) * 2023-07-27 2024-01-29 대호기업 주식회사 그라비아 인쇄용 실린더 제조방법

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US2149487A (en) * 1934-05-15 1939-03-07 Myron C Zilberman Half-tone engraving and apparatus for and method of making the same
DE2111628A1 (de) * 1971-03-11 1972-09-14 Gruner & Jahr Verfahren und Vorrichtung zum Herstellen von Druckformen,insbesondere Tiefdruckformen
US4013831A (en) * 1975-03-11 1977-03-22 Dr. -Ing. Rudolf Hell Gmbh Method for the production of printing forms
WO1989012256A1 (fr) * 1988-06-03 1989-12-14 Peter Markus Franc Procede de production de formes helio a profondeur variable ou a superficie et profondeur variables
EP1369230A1 (fr) * 2002-06-05 2003-12-10 Kba-Giori S.A. Procédé de fabrication d'une plaque gravée

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US4187107A (en) * 1975-10-21 1980-02-05 Toppan Printing Co., Ltd. Making gravure plate with tint screen
US5691818A (en) * 1993-02-25 1997-11-25 Ohio Electronic Engravers, Inc. System and method for enhancing edges and the like for engraving
US5663803A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Engraving method and apparatus for engraving areas using a shaping signal
DE19710005A1 (de) * 1997-03-12 1998-09-17 Heidelberger Druckmasch Ag Verfahren und Einrichtung zur Gravur von Druckzylindern
US6048446A (en) * 1997-10-24 2000-04-11 R.R. Donnelley & Sons Company Methods and apparatuses for engraving gravure cylinders
DE19805179B4 (de) * 1998-02-10 2005-03-10 Hell Gravure Systems Gmbh Verfahren zur Gravur von Druckformen
US6731405B2 (en) * 1999-05-14 2004-05-04 Artwork Systems Printing plates containing ink cells in both solid and halftone areas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149487A (en) * 1934-05-15 1939-03-07 Myron C Zilberman Half-tone engraving and apparatus for and method of making the same
DE2111628A1 (de) * 1971-03-11 1972-09-14 Gruner & Jahr Verfahren und Vorrichtung zum Herstellen von Druckformen,insbesondere Tiefdruckformen
US4013831A (en) * 1975-03-11 1977-03-22 Dr. -Ing. Rudolf Hell Gmbh Method for the production of printing forms
WO1989012256A1 (fr) * 1988-06-03 1989-12-14 Peter Markus Franc Procede de production de formes helio a profondeur variable ou a superficie et profondeur variables
EP1369230A1 (fr) * 2002-06-05 2003-12-10 Kba-Giori S.A. Procédé de fabrication d'une plaque gravée

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2006090A3 (fr) * 2007-06-20 2009-10-21 HELL Gravure Systems GmbH & Co. KG Procédé et dispositif pour former des images sur des plaques d'impression en creux et plaques d'impression en creux ainsi obtenues
DE102007029099A1 (de) * 2007-06-21 2008-12-24 Hell Gravure Systems Gmbh & Co. Kg Verfahren und Vorrichtung zur Bebilderung einer Tiefdruckform und so bebilderte Tiefdruckform
EP2151324A2 (fr) 2008-07-28 2010-02-10 Prinovis Dresden GmbH & Co. KG Procédé de fabrication d'un moule d'impression rotatif pour l'utilisation dans un procédé d'impression par rotation de rouleaux
DE102008035203A1 (de) 2008-07-28 2010-02-11 Leibniz-Institut für Oberflächenmodifizierung e.V. Verfahren zur Herstellung einer rotativen Druckform zum Einsatz in einem Rollenrotationsdruckverfahren
EP2305464A1 (fr) * 2009-09-30 2011-04-06 Ernst-Rudolf Dr. Weidlich Procédé de gravure d'une surface, une surface d'un moule d'impression pour l'impression en profondeur et une surface réalisée selon ce procédé
WO2012119704A1 (fr) 2011-03-09 2012-09-13 Hell Gravure Systems Gmbh & Co. Kg Procédé et dispositif d'usinage d'un cylindre, en particulier d'un cylindre d'impression ou d'estampage

Also Published As

Publication number Publication date
DE502004004634D1 (de) 2007-09-27
ES2293109T3 (es) 2008-03-16
JP2005238812A (ja) 2005-09-08
CN100421932C (zh) 2008-10-01
EP1568490B1 (fr) 2007-08-15
CN1660585A (zh) 2005-08-31
ATE369977T1 (de) 2007-09-15
US20050188868A1 (en) 2005-09-01

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