EP0210133B1 - Dispositif pour doser et égaliser un film de liquide sur un rouleau d'une machine à imprimer - Google Patents

Dispositif pour doser et égaliser un film de liquide sur un rouleau d'une machine à imprimer Download PDF

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Publication number
EP0210133B1
EP0210133B1 EP86810319A EP86810319A EP0210133B1 EP 0210133 B1 EP0210133 B1 EP 0210133B1 EP 86810319 A EP86810319 A EP 86810319A EP 86810319 A EP86810319 A EP 86810319A EP 0210133 B1 EP0210133 B1 EP 0210133B1
Authority
EP
European Patent Office
Prior art keywords
roller
liquid
belt
rotating roller
film
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
EP86810319A
Other languages
German (de)
English (en)
Other versions
EP0210133A2 (fr
EP0210133A3 (en
Inventor
Peter Gertsch
Robert Imhof
Franz Schneider
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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 Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Priority to AT86810319T priority Critical patent/ATE58335T1/de
Publication of EP0210133A2 publication Critical patent/EP0210133A2/fr
Publication of EP0210133A3 publication Critical patent/EP0210133A3/de
Application granted granted Critical
Publication of EP0210133B1 publication Critical patent/EP0210133B1/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/20—Ink-removing or collecting devices

Definitions

  • the invention relates to a device for fine metering and balancing a liquid film created by a liquid application device on a rotating roller of a printing press with a liquid-permeable fine metering belt which loops around the rotating roller and strips off the excess ink, which in turn runs into a catch basin, the liquid application device being used every revolution of the rotating roller completely renews the liquid film.
  • Such a device is shown in DE-A 2146045, in which a gauze is stretched against the ductor roller by a roller inking unit of an office offset printing machine for metering the amount of ink on the duct roller.
  • the duct roller has a substantially lower peripheral speed than the cylinder on which the printing form is arranged. For this reason, it is necessary to arrange a lifting roller after the duct roller.
  • This siphon roller takes on the ink at the same peripheral speed as the duct roller rotates and transfers it to a 1st inking roller which has the same peripheral speed as the printing form cylinder.
  • DE-A 28 12 998 shows a roller that directly colors the printing plate of the plate cylinder. This roller is forced to have a soft, rubber-elastic surface. The ink applied to the roller by an ink fountain is stripped off by an ink knife in such a way that the ink film has the thickness necessary for further processing.
  • the inking roller with the rubber-elastic surface according to DE-A 28 12 998 is preceded by an ink cylinder provided with a rigid surface, on which an ink film is produced by means of metering elements in order to compensate for the strong elastic deformation of the soft surface To avoid roller.
  • This additional inking roller which makes the whole arrangement more expensive, must have the exact same diameter as the plate cylinder, so that the appearance of so-called ghosting agents is prevented.
  • An additional inking roller between the plate cylinder and the ink cylinder must be arranged to avoid two rollers with a hard surface coming into contact with each other.
  • the ink film that is created on the inking roller is not completely balanced and renewed.
  • the residual ink film not taken up by the plate cylinder and remaining on the inking roller is overlaid with new ink the next time it is touched with the ink cylinder, which is repeated with each new rotation.
  • the object of the invention is to provide a device which makes it possible to produce a finely metered liquid film on a rotating roller with the least possible number of rollers, which film is created and compensated for every revolution of the rotating roller, and which further mentioned Avoids disadvantages.
  • the object is achieved in that the rotating roller comes into contact with an axially parallel forme cylinder that carries a printing form, and thereby transfers the stripping belts wrapped around the rotating roller to the required fine-metered liquid film for further processing on the printing form , wherein the rotating roller has a peripheral speed corresponding to the forme cylinder.
  • the surface quality and surface hardness of the rotating roller can be adapted in virtually any manner to the printing process, the liquid to be processed or the processing speed.
  • the dosing screws and their expensive control device are omitted for fine dosing of the liquid film on the rotating roller.
  • the quality of the belt can be varied practically as desired and adapted to the requirements of the work process, as a result of the stripping belt and rotating roller
  • the hydrodynamic pressure at production speed creates a pure fluid friction and thus the wear is very low.
  • Fig. 1 shows schematically a printing unit of a printing press, in which a paper web 1, which is printed, is passed in a known manner between a rubber cylinder 2 and an impression cylinder 3, which are rotatably mounted in a machine frame, not shown.
  • a plate cylinder 4 is assigned to the blanket cylinder 2, from which the print image is transferred to the blanket cylinder 2.
  • the plate cylinder 4 receives ink and / or dampening solution from a rotating roller 5.
  • the rotating roller 5, like the blanket cylinder 2 and plate cylinder 4, is driven by a known device (not shown), the peripheral speeds being the same.
  • the rotating roller 5 receives the liquid 6 from a liquid application device 7.
  • This liquid application device 7 is limited, for example, on the one hand by a rear wall 8, side walls 9, metering knife 10 and, on the other hand, by the rotating roller 5.
  • a gap 11 between metering knife 10 and rotating roller 5, its Width is set once by adjusting screws 12 at the start of operation, determines the film thickness 13 of the liquid which the rotating roller 5 takes with it.
  • the tension of the scraper belt 14 can be varied with the brakeable unwinding shaft 15. Braked unwinding shaft 15 and drivable winding shaft 16 make it possible to easily replace, for example, a worn area of the stripping belt 14 by wrapping it in the direction of the arrows 19 or 20 with a new area of the stripping belt 14, which can easily be done during operation of the printing press.
  • the stripping belt 14 strips off the liquid adhering to the rotating roller 5, the stripped liquid 21 being guided away through the intermediate spaces and running into a collecting basin 22. From there, the liquid 23 passes through lines (not shown) into a known processing device. The remaining liquid film 28 is then fed to the plate cylinder 4. The then remaining liquid residue 25 is completely renewed in the liquid container 7.
  • the blanket cylinder 2 can be replaced by an impression cylinder and the plate cylinder 4 by a plate or form cylinder corresponding to the type of printing, the web to be printed passing between these cylinders.
  • FIG. 2 shows an embodiment of a device for the fine metering of a liquid film on a rotating roller 5, the stripping belt 14 being designed as an endless belt 24.
  • This endless belt 24 is guided over rollers.
  • the drivable roller 37 is firmly seated on a rotatable, stationary shaft 26 which is driven by a continuously variable motor 27.
  • the pivotable roller 38 is in turn seated on a shaft 29, the position of which can be changed to set the wrap angle a.
  • a tensionable roller 30 is freely rotatable on an axis 31.
  • the axis 31 is stuck in one end of a lever 32 which can be rotated about a fixed axis 33.
  • the other end of the lever 32 is connected in an articulated manner to a pressure cylinder 34 which is rotatably articulated on a fixed pin 35.
  • a pressure cylinder 34 which is rotatably articulated on a fixed pin 35.
  • the rotating roller 5 is provided with a cavity 36, which enables cooling of the rotating roller 5 which may be necessary.
  • the device shown in FIG. 3 is also provided with an endless belt 24, like the embodiment shown in FIG. 2.
  • the endless belt 24 runs over a drivable roller 37, a pivotable roller 38 and a tensionable roller 39.
  • the drivable roller 37 is driven by a continuously variable motor 27.
  • Another roller 41 which is arranged on a stationary shaft 42, lies in the region of a cleaning basin 43 which is filled with a cleaning agent 44. When not in use, the cleaning basin 43 can be placed in a lower layer 45 (shown in dashed lines) be lowered.
  • the belt outlet runs through a device 46 or 47, which removes unnecessary cleaning agent from the endless belt 24, for example by wiping it off.
  • the device 46 or 47 is in engagement, depending on the running direction of the endless belt 24. This arrangement also makes it possible to clean the rotating roller 5.
  • the base material consists of a film 48, which can be metallic or plastic, for example, the side of which facing the rotating roller 5 has a smooth surface, and which is provided with a number of rows of holes 49.
  • the oval holes 50 for example, allow the liquid stripped by the webs 51 remaining between them to run away and to flow into the collecting basin 22.
  • FIG. 5 shows a further embodiment of the stripping belt used for the device described.
  • Webs 55 are arranged on inextensible but flexible band strips 52, 53, 54, which are at a mutual distance a.
  • the intermediate space 56 thus formed allows the liquid wiped off by the webs 55 to run away and reaches the catch basin 22 (FIG. 1).
  • All the adjustment devices of this invention can of course be automated, for example the various setting variables are stored in a control unit and the various programs can thus be run.
  • the entire scraper belt holder and / or liquid container can be accommodated in boxes which have lateral boundaries and can therefore be easily replaced.
  • the width of the boxes can be such that several boxes can be arranged across the roll width.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coating Apparatus (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Claims (11)

1. Dispositif pour assurer le dosage fin et l'égalisation d'un film de liquide produit par un dispositif d'application de liquide sur un cylindre rotatif d'une machine d'imprimerie comportant une bande de dosage fin à travers laquelle le liquide peut passer, cette bande entourant le cylindre rotatif et raclant l'encre en excès, qui s'écoule de son côté dans un bac de récupération, le dispositif d'application du liquide assurant le renouvellement complet du film de liquide à chaquer tour du cylindre rotatif, caractérisé en ce que le cylindre rotatif (5) vient en appui contre un cylindre porte-plaque (4) d'axe parallèle qui porte un cliché à reproduire et transfère ainsi sur le cliché à reproduire le film de liquide (28) dosé avec précision à la cote voulue pour le travail ultérieur par une ou plus d'une bande de raclage (14) passant sur le cylindre rotatif (5), celui-ci ayant une vitesse tangentielle qui correspond à celle du cylindre porte-plaque (4).
2. Dispositif selon la revendication 1, caractérisé en ce qu'on peut faire avancer la bande de raclage (14), entre un rouleau de déroulement (15) associé à un frein et un rouleau d'enroulement (16) entraîné en rotation par un mécanisme, ce rouleau d'enroulement (16) pouvant occuper une position variable sur un trajet courbe (17), pour permettre de régler l'amplitude angulaire a de la plage de contact de la bande (14) en appui contre le cylindre (5).
3. Dispositif conforme à la revendication 1, caractérisé en ce que la bande de raclage (14) est constituée par une bande sans fin (24), montée sur au moins un rouleau d'entraînement (37) associé à un mécanisme moteur, et sur un rouleau (38) mobile sur une glissière, ainsi que sur un rouleau de tension (30).
4. Dispositif conforme à la revendication 3, caractérisé en ce que le sens de rotation du rouleau d'entraînement (37) qui assure le mouvement de la bande sans fin (24) peut être choisi à volonté.
5. Dispositif conforme à la revendication 4, caractérisé en ce que le mécanisme moteur (27) du rouleau d'entraînement (37) de la bande sans fin (24) est réglable de manière continue.
6. Dispositif conforme à la revendication 5, caractérisé en ce que la bande sans fin (24) est guidée pour passer à travers un dispositif de nettoyage (43, 44).
7. Dispositif conforme à la revendication 6, caractérisé en ce que le dispositif de nettoyage (43, 44) peut être amené en position inactive, en dehors du trajet de la bande sans fin (24).
8. Dispositif conforme à l'une des revendications 6 ou 7, caractérisé en ce qu'il comporte un dispositif (46, 47) prévu pour enlever le liquide détergent qui adhère à la bande sans fin (24).
9. Dispositif conforme à l'une des revendications 1 à 8, caractérisé en ce que la bande de raclage (14, 24) est constituée par un tissu en fils de matière synthétique et/ou en fils métalliques.
10. Dispositif conforme à l'une des revendications 1 à 8, caractérisé en ce que la bande de raclage (14, 24) est constituée par une feuille mince qui présente une surface lisse, et qui comporte des perforations (50) réparties sur toute la zone de raclage, ces perforations ayant une forme choisie à volonté.
11. Dispositif conforme à l'une des revendications 1 à 8, caractérisé en ce que la bande de raclage (14, 24) est constituée par plusieurs courroies (52, 53, 54) qui sont reliées entre elles, de leur côté en regard du cylindre rotatif (5), par des barrettes (55) prévues pour assurer le raclage du liquide, un certain écartement étant ménagé entre ces barrettes.
EP86810319A 1985-07-23 1986-07-15 Dispositif pour doser et égaliser un film de liquide sur un rouleau d'une machine à imprimer Expired - Lifetime EP0210133B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810319T ATE58335T1 (de) 1985-07-23 1986-07-15 Vorrichtung zum feindosieren eines fluessigkeitsfilms auf einer rotierenden walze einer druckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526308 1985-07-23
DE19853526308 DE3526308A1 (de) 1985-07-23 1985-07-23 Vorrichtung zum feindosieren eines fluessigkeitsfilms auf einer rotierenden walze einer druckmaschine

Publications (3)

Publication Number Publication Date
EP0210133A2 EP0210133A2 (fr) 1987-01-28
EP0210133A3 EP0210133A3 (en) 1988-07-20
EP0210133B1 true EP0210133B1 (fr) 1990-11-14

Family

ID=6276518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810319A Expired - Lifetime EP0210133B1 (fr) 1985-07-23 1986-07-15 Dispositif pour doser et égaliser un film de liquide sur un rouleau d'une machine à imprimer

Country Status (8)

Country Link
EP (1) EP0210133B1 (fr)
JP (1) JPS6264550A (fr)
AT (1) ATE58335T1 (fr)
CA (1) CA1280033C (fr)
CH (1) CH670421A5 (fr)
DE (1) DE3526308A1 (fr)
FI (1) FI81998C (fr)
IN (1) IN166256B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3714936A1 (de) * 1987-05-05 1988-12-08 Wifag Maschf Farbwerk fuer eine druckmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2146045A1 (de) * 1971-09-15 1973-03-29 Roto Werke Gmbh Walzenfarbwerk fuer druckmaschinen
DE2538105C3 (de) * 1974-09-11 1978-06-22 Hans Jacob Dipl.-Ing. Oesteraas Moestue (Norwegen) Waschvorrichtung eines Zylinders einer Druckmaschine
DE2555993C3 (de) * 1975-12-12 1980-11-06 Koenig & Bauer Ag, 8700 Wuerzburg Farbkasten eines Farbwerkes
SE433829B (sv) * 1977-03-21 1984-06-18 Dahlgren Harold P Forfarande och tryckfergsutmetningsapparat for utmetning av tryckferg
DE2856088A1 (de) * 1978-12-23 1980-07-03 Maschf Augsburg Nuernberg Ag Farbwerk
DE3217569C2 (de) * 1982-05-11 1985-11-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zum Dosieren der Farbe bei Offsetdruckmaschinen

Also Published As

Publication number Publication date
JPS6264550A (ja) 1987-03-23
JPH0455594B2 (fr) 1992-09-03
FI81998C (fi) 1991-01-10
CA1280033C (fr) 1991-02-12
EP0210133A2 (fr) 1987-01-28
ATE58335T1 (de) 1990-11-15
DE3526308A1 (de) 1987-02-05
DE3526308C2 (fr) 1988-04-07
EP0210133A3 (en) 1988-07-20
FI81998B (fi) 1990-09-28
FI862701A0 (fi) 1986-06-25
FI862701A (fi) 1987-01-24
CH670421A5 (fr) 1989-06-15
IN166256B (fr) 1990-03-31

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