EP0313510B1 - Dispositif pour le montage de clichés flexographiques - Google Patents

Dispositif pour le montage de clichés flexographiques Download PDF

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Publication number
EP0313510B1
EP0313510B1 EP88730230A EP88730230A EP0313510B1 EP 0313510 B1 EP0313510 B1 EP 0313510B1 EP 88730230 A EP88730230 A EP 88730230A EP 88730230 A EP88730230 A EP 88730230A EP 0313510 B1 EP0313510 B1 EP 0313510B1
Authority
EP
European Patent Office
Prior art keywords
mounting
vacuum
impression cylinder
block
cliché
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
EP88730230A
Other languages
German (de)
English (en)
Other versions
EP0313510A2 (fr
EP0313510A3 (en
Inventor
Manfred Hornschuh
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.)
Albert Bauer KG Grafische Werkstatten (gmbh & Co)
Original Assignee
Albert Bauer KG Grafische Werkstatten (gmbh & Co)
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 Albert Bauer KG Grafische Werkstatten (gmbh & Co) filed Critical Albert Bauer KG Grafische Werkstatten (gmbh & Co)
Publication of EP0313510A2 publication Critical patent/EP0313510A2/fr
Publication of EP0313510A3 publication Critical patent/EP0313510A3/de
Application granted granted Critical
Publication of EP0313510B1 publication Critical patent/EP0313510B1/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
    • 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
    • B41N6/02—Chemical means for fastening printing formes on mounting boards
    • 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
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B41F27/1275—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means by means of adhesives, staples

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Such a device is known from US-A-3,983,808.
  • the receiving surface is moved relative to the printing cylinder.
  • the arrangement of the cliché on the mounting surface is done solely by a large number of dowel pins and corresponding holes.
  • the register is one of the strongest influencing variables. Any optimal reprotechnical elaboration will result in a poor printing result due to a poor register.
  • it is separated into the three chromatic colors of the subtractive color mixture yellow, magenta, cyan and black as the fourth in specially designed devices (eg preferably scanners).
  • the reflection base e.g. paper white
  • the reflection base becomes larger or smaller in the event of a non-register. If it gets bigger, the color becomes more dominant, if it gets smaller, it associates itself with the color that is denser in the circle arrangement.
  • this system can be used from repro to assembly, plate copying to plate assembly within the machine.
  • the same dowel system can be used, for example, for packaging flexographic printing only up to the matt film required for the production of the plate. At least before the exposure of the matt film registration marks, which are attached to the middle of the side of an image, must be mounted.
  • the clichés are mounted on a specially designed device, which consists of a cylinder with paper attached to it, a holder for holding the cliché cylinder and a glass mirror. On the paper attached to the cylinder, a device and an ink pen or the like are used.
  • a rough sketch of the stand This sketch shows roughly exact dimensions in the axial direction, while in the running direction it only shows the later final print size, with the large tolerances caused by development errors and the line width of the ink stick.
  • the center of the printed image is marked by a line or similar marked. The same applies to the route transverse to the running direction.
  • An angle error of the mirror of 0.5 ° which over the working width of the cylinder e.g. of 1.50 m or 2.20 m results in a registration error depending on the cylinder circumference, i.e. in the length of the printed image up to 1.5 mm. Since the cliché is glued to the cylinder by hand, the angle of view of the assembler varies from color to color, i.e. from cylinder to cylinder, different. The slightest changes in the viewing angle have the result that the registration cross is incorrectly mirrored or seen, with the result that the six colors cannot be fitted to each other with a perfect fit. Due to the constantly changing viewing angle alone, registration errors of 0.5 to 0.75 mm are the result, depending on the working width and length. These errors increase with the number of panels on a cylinder.
  • the cliché is placed on the cylinder, for example, with double-sided adhesive tape, and pressed lightly with the palm of the hand without exerting partial pressure. You avoid heavier pressure marks, as they become apparent later in production.
  • the cliché is then put under stress, with the theoretical distance e.g. reduced by approx. 50 ⁇ m between the surface of the printing cylinder and the printing surface of the substrate.
  • the advantage of drilling in an axial line and fitting over round holes is small because the strip carrying the hole is cut off before the final fastening and is not available for repetitive tasks.
  • the invention is therefore based on the object to provide a device according to the preamble of claim 1, which also enables the mounting of the cliché on the printing cylinder with the help of the known trim strips with dowel pins, in order to substantially improve the print quality and even with flexographic printing in particular to ensure that the clichés for the individual plates print exactly on top of each other, on the other hand that for the first time it can be installed regardless of the direction of rotation.
  • the perforation is always in the "dead" space not required for printing - either on the long or short side - and is retained for subsequent editions.
  • the mounting device makes it possible to fasten the clichés precisely and securely on the printing cylinder and, in particular, to arrange the clichés of the individual colors so precisely that a print image is produced in such a way that a correspondingly exact print takes place, i.e. the arrangement is reproducible.
  • a mounting film with graduation which is preferably a millimeter graduation, enables an exact fixation of the cliché (which is transparent) before locking the mounting bar and switching on the vacuum.
  • the assembly device shown in the drawing shows an assembly table 10 with a mounting surface 7. To the side of the mounting surface 7, racks 3 are arranged.
  • a drive 6 with a receptacle 4 for the pressure cylinder 1 can be moved over the mounting surface 7, specifically in the direction of the toothed racks 3.
  • the pressure cylinder 1 is mounted in the two receptacles 4 with the help of bearing pins 5.
  • the receptacles 4 are adjustable in height so that printing cylinders with different diameters can be accommodated.
  • the gear wheel 2 of the pressure cylinder 1 engages in a rack 3.
  • the drive 6 also engages via a gear with a gear in one or both racks in order to move the pressure cylinder 1 over the mounting surface, the engagement between the gear 2 and the rack 3 ensuring a corresponding rolling movement of the pressure cylinder, that of the actual one Pressure corresponds.
  • mounting grooves 15, 16 and 17 are provided in the mounting surface 7.
  • the mounting grooves 15 and 17 run perpendicular to the axis of the printing cylinder 1, whereas the mounting groove 16 in turn runs perpendicular to the mounting grooves 15 and 17.
  • the known mounting strips 11, 12 and 13 can be arranged in the mounting grooves.
  • first vacuum openings 18 and second vacuum openings 19 are provided in the mounting surface 7.
  • the two groups of vacuum openings 18 and 19 can be supplied with negative pressure independently of one another.
  • the mounting film 8 and the cliché 9 are indicated on the mounting surface 7.
  • the drive 6 is moved to one end of the assembly table 10.
  • the pressure cylinder which is already provided with an adhesive tape or with spray adhesive, is inserted in the receptacle 4 so that the gearwheel 2 engages with the one rack 3.
  • a mounting strip 11 for the mounting film 8 is then inserted, for example, into the mounting groove 15.
  • This mounting bar is then locked by a fastener, not shown.
  • a mounting film 8 is then placed, which is provided with appropriate punched holes.
  • the mounting film is provided on two mutually perpendicular sides with corresponding perforations and holes for the vacuum 18.
  • the applied mounting film is then sucked in with the help of the second vacuum openings 19 so that it is immovably fixed.
  • the different expansion factors are taken into account by changing the mounting foils, i.e. one film each for the plate thickness 0.51, as well as one film for 0.64 or one film e.g. for 0.76 mm etc.
  • the use of an assembly film can be dispensed with.
  • the assembly division is applied directly to the foundation.
  • the vacuum openings 19 and 18 are connected in parallel.
  • a mounting strip 12 with dowel pins 14 is inserted into the free mounting groove 16, which runs perpendicular to the mounting groove 11 already used.
  • the cliché with its punched holes is then placed on the dowel pins 14, this assembly bar 12, the side of the cliché which is later to be used for the color pointing downwards, ie the Assembly film is facing.
  • the mounting bar 12 is now moved with the cliché in the direction of the mounting groove 16 until the cliché - which is transparent - assumes the desired and exact position, taking into account the dimensions. If this is the case, the first vacuum openings are supplied with vacuum so that the cliché is sucked in and can no longer be moved.
  • the printing cylinder with its adhesive surface with an additional value of preferably + 50 microns is moved over the cliché, synchronized with this movement, the vacuum in the corresponding row of the first vacuum openings 18 is switched off, so that wherever the bonding begins, the cliché of the mounting foil can be lifted off.
  • the interruption of the vacuum always takes place in a row parallel to the axis of the printing cylinder and depending on the progressive movement of the printing cylinder.
  • the printing cylinder is removed and the process is repeated for the cliché for the second color, which is correspondingly mounted on the second printing cylinder. Since the fitting strips are immovably fixed and have been locked accordingly, it is ensured that the clichés are successively assembled one above the other for printing.
  • the mounting film has the same scale as the cliché.
  • a millimeter graduation is often provided. This millimeter graduation corresponds to the actual conditions in the direction of the axis of the printing cylinder 1. Perpendicular to this direction, i.e. in the direction of rotation of the printing cylinder, there is distortion, i.e. a reduction by the percentage of the stretching of the cliché - matched to the circumference or diameter of the printing cylinder -.
  • the arrangement of the mounting bar for the mounting film takes place in coordination with the printed image, i.e. as cheaply as possible to the place where the cliché is to be arranged. If the mounting block for the cliché on one side, i.e. are arranged perpendicular to the axial direction of the printing cylinder, the mounting strip for the mounting film is arranged in the mounting groove running perpendicular to this.
  • the cliché After placing and fixing the mounting film, the cliché is put on and moved with its mounting bar until the desired position on the mounting film is reached. Then the mounting bar is locked by a mechanical fastener and the first vacuum openings 18 are supplied with negative pressure.
  • the assembly table can also be cylindrical, i.e. the mounting surface is then curved. Whether designed as a table or as a cylinder, precise assembly is only possible if compressed air is counteracted at the same time as the vacuum is switched off (during the assembly process) in order to adhere the non-contact parts of the cliché to the pressure cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Printing Methods (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Claims (4)

  1. Dispositif de montage de clichés flexographiques, à l'aide d'une bande adhésive double face, sur un cylindre d'impression équipé d'une roue dentée, tourillonnant sur un support (4), disposé sur un entraînement (6), déplaçable, par rapport à une surface de montage, au-dessus de cette surface de montage (7) portant la face d'impression du cliché (9), la roue dentée (2) du cylindre d'impression (1) étant en prise avec une crémaillère (3) ou analogue située sur la table de montage, dans laquelle sont prévues les pointures (14) correspondant aux perçages ménagés dans le cliché, caractérisé en ce que la surface de montage (7) est pourvue d'une pluralité de premières ouvertures à vide (18) pouvant être raccordées à une source de vide et susceptibles d'en être isolées, selon une rangée parallèle à l'axe du cylindre d'impression, en fonction de son mouvement au-dessus de la surface de montage (7), et la commande de suppression du vide donnant lieu simultanément à une alimentation en air comprimé.
  2. Dispositif selon la revendication 1, caractérisé en ce que des rainures de montage sont réalisées dans la surface de montage (7), parallèlement et perpendiculairement à l'axe du cylindre d'impression (1), pour recevoir des bandes de montage (11,12,13), les pointures (14) étant prévues sur les bandes de montage.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'une feuille de montage (8) portant une échelle de division est disposée entre la surface de montage (7) et le cliché (9), à l'aide d'une bande de montage (11), et susceptible d'être soumise à une aspiration, au moyen de deuxièmes ouvertures à vide (19), alimentées en vide indépendamment des premières ouvertures à vide (18), et la feuille de montage (8) présentant des ouvertures de passage coïncidant avec les premières ouvertures à vide (18), la bande de montage (11) destinée à la feuille de montage (8) étant disposée dans une rainure de montage (15) s'étendant perpendiculairement à la rainure de montage (16) servant à recevoir la bande de montage (12) destinée au cliché (9).
  4. Dispositif selon la revendication 3, caractérisé en ce que l'échelle de division de la feuille de montage (8) est à la même échelle que le cliché, les dimensions effectives étant données parallèlement à l'axe du cylindre d'impression (1), alors que, perpendiculairement à l'axe du cylindre d'impression, est réalisé un raccourcissement, ayant la valeur du pourcentage de dilatation du cliché (9), calculé pour la valeur de la circonférence spécifique du cylindre d'impression.
EP88730230A 1987-10-21 1988-10-21 Dispositif pour le montage de clichés flexographiques Expired - Lifetime EP0313510B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873735659 DE3735659A1 (de) 1987-10-21 1987-10-21 Vorrichtung zur montage von flexo-klischees
DE3735659 1987-10-21

Publications (3)

Publication Number Publication Date
EP0313510A2 EP0313510A2 (fr) 1989-04-26
EP0313510A3 EP0313510A3 (en) 1990-06-13
EP0313510B1 true EP0313510B1 (fr) 1993-12-22

Family

ID=6338796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730230A Expired - Lifetime EP0313510B1 (fr) 1987-10-21 1988-10-21 Dispositif pour le montage de clichés flexographiques

Country Status (2)

Country Link
EP (1) EP0313510B1 (fr)
DE (2) DE3735659A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903806C1 (fr) * 1989-02-09 1990-02-01 Dieter Dr. 4005 Meerbusch De Hoell
NL9400057A (nl) * 1994-01-13 1995-08-01 J M J Houtstra Holding B V Bevestigingsmiddel.
US6085653A (en) * 1995-01-13 2000-07-11 Winkle Holding, B.V. Method for producing printed matter and printing form attachment means for use in the method
US5626076A (en) * 1995-11-09 1997-05-06 Ireton; Robert E. Printing plate mounting system, physical register record plate and method employing the same
DE29614107U1 (de) * 1996-08-15 1996-12-12 Roosen Reiner Vorrichtung zum Aufbringen von Klebeband auf einen Druckzylinder
DK1457322T3 (da) * 2003-03-13 2008-10-13 Bieffebi Spa Korrekturpresse til at montere flexografiske trykplader
CN104298007B (zh) * 2014-10-24 2017-02-15 合肥鑫晟光电科技有限公司 贴布装置及贴布方法
RU2663001C1 (ru) * 2017-09-29 2018-07-31 3М Инновейтив Пропертиз Компани Печатная пластина и способ её установки
EP4000932A1 (fr) 2020-11-19 2022-05-25 Bobst Bielefeld GmbH Procédé et dispositif pour fixer une plaque d'impression sur un cylindre d'impression

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786385A (en) * 1953-10-19 1957-03-26 Sta Hi Corp Comparator for stereotype mats and the like
DE1276054B (de) * 1966-02-24 1968-08-29 Reinhold Westerheide Vorrichtung zur Aufbringung mehrerer neben- und hintereinanderliegender Klischees auf Formzylinder
US3983808A (en) * 1971-12-02 1976-10-05 Chromax Ltd. Method and apparatus for applying flexographic printing plates to the printing cylinders of a multi-cylinder printing machine
US4361091A (en) * 1977-02-14 1982-11-30 Favorite Check Printers, Inc. Vacuum positioning system for use in composing a plate for offset printing
US4446625A (en) * 1979-02-28 1984-05-08 E. I. Du Pont De Nemours And Company Apparatus for mounting flexible printing plates

Also Published As

Publication number Publication date
EP0313510A2 (fr) 1989-04-26
DE3886499D1 (de) 1994-02-03
EP0313510A3 (en) 1990-06-13
DE3735659A1 (de) 1989-05-03

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