EP0078444B1 - Dispositif d'encrage pour machines à imprimer offset - Google Patents

Dispositif d'encrage pour machines à imprimer offset Download PDF

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Publication number
EP0078444B1
EP0078444B1 EP82109626A EP82109626A EP0078444B1 EP 0078444 B1 EP0078444 B1 EP 0078444B1 EP 82109626 A EP82109626 A EP 82109626A EP 82109626 A EP82109626 A EP 82109626A EP 0078444 B1 EP0078444 B1 EP 0078444B1
Authority
EP
European Patent Office
Prior art keywords
roller
ink
inking
duct
plate cylinder
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
Application number
EP82109626A
Other languages
German (de)
English (en)
Other versions
EP0078444A1 (fr
Inventor
Willi Jeschke
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to DE8585101334T priority Critical patent/DE3279324D1/de
Publication of EP0078444A1 publication Critical patent/EP0078444A1/fr
Application granted granted Critical
Publication of EP0078444B1 publication Critical patent/EP0078444B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices

Definitions

  • the invention relates to an inking unit for offset printing machines according to the preamble of claim 1 (DE-B-23 23 025).
  • an inking roller with an elastic surface is provided for inking the printing plate, the diameter of which is significantly smaller than that of the plate cylinder.
  • This inking roller is assigned an ink cylinder which receives the ink to be transferred from a metering roller, so that an ink film of a certain thickness is produced over the entire width.
  • the metering roller is driven at a lower speed than the ink cylinder, such that a change in the ink film thickness can be achieved due to the existing slip between the metering roller and transfer roller.
  • a dampening unit is associated with the known version of the applicator roller.
  • the rider rollers which are also assigned to the applicator roller and carry out a lateral rubbing movement, serve the purpose of achieving a more uniform color distribution after this additional effort for eliminating ghost images in the known embodiment is required.
  • So-called "short” inking units are already known, in which the split ink film returning from the plate is completely covered with a large amount of ink and then rebuilt by knife coating.
  • This type of inking unit includes the design according to DE-B-23 23 025.
  • the main disadvantage of this type is that the inking roller is exposed to high mechanical wear due to the doctor device.
  • the high peripheral speeds of modern offset printing machines mean that high temperatures occur on the doctor device - regardless of whether it is a doctor roller or a doctor edge.
  • an opposite direction of movement of the lateral surfaces of the doctor roller and the applicator roller and penetration of the doctor device into the ink application roller are necessary. If this causes damage to the inking roller, also due to the deposition of dirt particles at the squeegee point, markings in the print are inevitable.
  • Another disadvantage of the known design is that, despite a platen roller the size of a plate cylinder, it is not possible to dye without stenciling. For example, several small ink-guiding rollers are provided between the plate cylinder and applicator roller, which can cause stenciling. This danger is exacerbated by the fact that some of these rollers apply the dampening solution to the returning color profile of the printing plate.
  • the object of the invention is to provide an inking unit which, when using a maximum of two inking rollers, works without stenciling on the application roller and does not require any stenciling and ensures perfect, low-wear inking of the printing plate, so that printing jobs can be carried out in the highest quality and in which no stenciling can occur due to the necessary dampening of the offset plate.
  • the solution uses only two inking rollers and an ink cylinder, to which an ink metering device is assigned to produce a continuous, uniform ink film.
  • the diameter of the inking rollers is designed so that it corresponds to the plate cylinder diameter, so that stenciling is certainly prevented.
  • the arrangement of the dampening device on the first inking roller has the advantage that the continuous wet film is applied to a likewise continuous ink film, so that no stenciling can be caused by dampening rollers.
  • the solution according to claim 1 has the further advantage that the inking is intensified by the two application rollers, so that even difficult prints are easy to master. It is also ensured by the two application rollers, the plate cylinder diameter and by their distance from each other at a certain ink cylinder diameter that no stenciling occurs.
  • the dampening system is the first Applicator roller assigned, which ensures safe moistening of the printing plate.
  • the solution to the problem is a simple and inexpensive design of an offset printing unit, which meets all quality requirements of a modern machine design using only three inking rollers. Another advantage is that by rolling only two application rollers on the printing plate, the wear of the same is reduced.
  • FIG. 1 an offset printing unit for printing sheets is shown with a sheet system 1, with which the sheets are fed to a printing cylinder 2. On this cylinder they receive their imprint from a rubber cylinder 3. After printing, they are fed from a delivery system 4 to the delivery stack 5.
  • the rubber cylinder 3 interacts with a plate cylinder 6, to which two inking rollers 7, 7 'are assigned, the diameters of which almost correspond to the plate cylinder diameter.
  • the inking rollers 7, 7 ' have an elastic surface and transfer an absolutely uniform ink film of constant thickness to the printing areas of the printing plate of the plate cylinder 6.
  • the ink cylinder 8 is assigned an ink fountain 9 with an ink metering device 10 (not to be explained in more detail), which enables the ink film thickness on the ink cylinder 8 to be regulated.
  • the first inking roller 7 is assigned a dampening unit 11, which transfers the dampening solution from a dampening tank 12 via the dampening rollers 13, 14 to the inking roller 7.
  • the ink cylinder 8 can e.g. in the case of a large amount of paper dust, a device 20 which removes the color residual profile may be assigned.
  • the diameter of the inking rollers 7,7 'and the diameter of the ink cylinder 8 are designed almost equal to the plate cylinder diameter, it is sufficient to arrange the two inking rollers 7,7' at an angle of 90 ° to each other in order to surely stencil to prevent.
  • the ink cylinder 8 according to FIGS. 1 and 2 can equally well be made smaller in diameter.
  • the diameter of the ink cylinder 8 can thus be freely determined within the scope of the design options.
  • the color cylinders 8, 8 ' are formed with a hard, non-elastic surface.
  • the application rollers can thus be made thicker than the plate cylinder for regrinding up to approx. 1 mm in diameter.
  • Another advantage of the small differences in diameter is that a defect, e.g. on the outer surface of an application roller, migrates by a small amount on the circumference with each plate cylinder rotation and thus does not lead to punctual damage to the printing plate.
  • Fig. 2 differs from Fig. 1 in that seen on the inking roller 7 in the same direction of rotation, after the dampening unit 11 and before the transfer point to the plate cylinder 6, a friction roller 31 is provided, the rough chrome surface to improve the printing result leads without fear of stenciling.
  • an ink feed system with a larger number of rollers can also be used for difficult work with special inks or paper types. which are equivalent to a conventional inking unit part (Fig. 4).
  • These can be assigned to the ink cylinder 8 instead of the ink fountain 9 without difficulty.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Color Image Communication Systems (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (7)

1 - Dispositif d'encrage pour machines d'impression offset destinées à l'impression de feuilles ou de bandes, comprenant un cylindre porte-plaque qui reçoit l'encre nécessaire d'un rouleau toucheur possédant une surface élastique, qui présente le même diamètre que le cylindre porte-plaque et qui coopère avec un cylindre d'encrage auquel l'encre est amenée par un dispositif d'amenée de l'encre, caractérisé en ce qu'au cylindre d'en crage (8) est associé un dispositif d'amenée de l'encre qui produit une pellicule d'encre continue, en ce qu'au cylindre d'encrage (8) font suite deux rouleaux toucheurs (7, 7') possédant à peu près le même diamètre que le cylindre porte-plaque (6) et qui coopèrent avec le cylindre porte-plaque (6), et en ce que la somme des longueurs d'arcs (11) allant, considéré dans le sens de la rotation, de la zone de contact (26) du cylindre porte-plaque (6) avec le premier rouleau toucheur (7) à la zone de contact (17) avec le deuxiàme rouleau toucheur (7'), de cette zone, le long de la circonférence du deuxième rouleau toucheur (7') jusqu'à la zone de contact (18) avec le cylindre d'encrage (8) et, le long de la circonférence de ce cylindre, jusqu'à la zone de contact (19) avec le premier rouleau toucheur (7), est égale à la longueur d'arc (12) mesurée sur le premier rouleau toucheur (7), de la zone de contact (16) avec le cylindre porte-plaque (6) à la zone de contact (19) avec le cylindre d'encrage (8), plus la circonférence d'un rouleau toucheur (7), en ce que, au premier rouleau toucheur (7), considéré dans le sens de la rotation du cylindre porte-plaque (6), est associé un dispositif de mouillage (11) comprenant au moins un rouleau (14) qui transmet l'agent mouillant, et en ce que la transmission de l'agent mouillant au rouleau toucheur (7) se produit, considéré dans le sens de la rotation de ce rouleau, en amont de la zone de contact (16) entre ce rouleau et le cylindre porte-plaque (6) et en aval de la zone de contact (19) entre ce rouleau et le cylindre d'encrage (8).
2 - Dispositif d'encrage selon la revendication 1, caractérisé en ce que le cylindre d'encrage (8) possède une surface dure, non élastique.
3 - Dispositif d'encrage selon la revendication 1, caractérisé en ce qu'au cylindre d'encrage (8) est associé un dispositif d'amenée de l'encre, composé d'un encrier (9) muni d'un dispositif doseur d'encre (10).
4 - Dispositif d'encrage selon la revendication 1, caractérisé en ce qu'au cylindre d'encrage (8) est associé, en amont de l'encrier (9) dans le sens de rotation de ce cylindre, un dispositif (20) servant à éliminer le profil d'encre résiduel.
5 - Dispositif d'encrage selon la revendication 1, caractérisé en ce qu'au premier rouleau toucheur (7), est associé, en amont du cylindre porte-plaque (6) considéré dans le sens de la rotation de ce rouleau, un rouleau frotteur (31) muni d'une surface latérale chromée rugueuse.
6 - Dispositif d'encrage selon la revendication 1, caractérisé en ce que les rouleaux toucheurs (7, 7') sont garnis, de la même façon qu'un cylindre d'impression, d'un tissu caoutchouté qui est tendu sur chaque rouleau toucheur (7), au moyen de dispositifs de tension logés dans une rainure-du rouleau, et qu'ils sont entraînés à la même vitesse de rotation que le cylindre porteplaque (6).
7 - Dispositif d'encrage selon la revendication 1, caractérisé en ce qu'au cylindre d'encrage (8), est associé un dispositif d'amenée de l'encre composé de trois rouleaux encreurs (21, 22, 23), de deux rouleaux frotteurs (24, 25), d'un rouleau de transmission (26), d'un rouleau doseur (27), et d'un rouleau d'encrier (28) associé à un encrier (29).
EP82109626A 1981-10-31 1982-10-19 Dispositif d'encrage pour machines à imprimer offset Expired EP0078444B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8585101334T DE3279324D1 (en) 1981-10-31 1982-10-19 Inking arrangement for offset printing machines

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3143314 1981-10-31
DE3143314 1981-10-31
DE3232780 1982-09-03
DE3232780A DE3232780C2 (de) 1981-10-31 1982-09-03 Farbwerk für Offsetdruckmaschinen

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP85101334.2 Division-Into 1982-10-19

Publications (2)

Publication Number Publication Date
EP0078444A1 EP0078444A1 (fr) 1983-05-11
EP0078444B1 true EP0078444B1 (fr) 1986-03-19

Family

ID=25797014

Family Applications (2)

Application Number Title Priority Date Filing Date
EP82109626A Expired EP0078444B1 (fr) 1981-10-31 1982-10-19 Dispositif d'encrage pour machines à imprimer offset
EP85101334A Expired EP0159474B1 (fr) 1981-10-31 1982-10-19 Dispositif d'encrage pour machines d'impression offset

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP85101334A Expired EP0159474B1 (fr) 1981-10-31 1982-10-19 Dispositif d'encrage pour machines d'impression offset

Country Status (9)

Country Link
US (1) US4573407A (fr)
EP (2) EP0078444B1 (fr)
AT (1) AT384996B (fr)
AU (1) AU562988B2 (fr)
CA (1) CA1208489A (fr)
DE (3) DE3232780C2 (fr)
DK (1) DK467382A (fr)
ES (1) ES516981A0 (fr)
NO (1) NO159360C (fr)

Families Citing this family (31)

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Publication number Priority date Publication date Assignee Title
DE3217569C2 (de) * 1982-05-11 1985-11-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zum Dosieren der Farbe bei Offsetdruckmaschinen
DE3401886A1 (de) * 1984-01-20 1985-08-01 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und vorrichtung zur einfaerbung der platte eines plattenzylinders von rotationsdruckmaschinen
US4869665A (en) * 1987-04-01 1989-09-26 Maxon Corporation Carbon monoxide reducing endplate apparatus
DD283581A5 (de) * 1988-03-25 1990-10-17 Veb Kombinat Polygraph "Werner Lamberz" Leipzig,Dd Kurzfarbwerk
DE3811288A1 (de) * 1988-04-02 1989-10-19 Roland Man Druckmasch Feuchtwerk an einer rollenrotations- offsetdruckmaschine
DE3917340A1 (de) * 1989-05-27 1990-11-29 Simon Sa Offset-rotationsmaschine
DE3922559C2 (de) * 1989-07-08 1994-03-24 Roland Man Druckmasch Offsetdruckwerk
DE19731003B4 (de) * 1997-07-18 2004-07-01 Man Roland Druckmaschinen Ag Kurzfarbwerk
DE19732497B4 (de) * 1997-07-29 2005-08-11 Man Roland Druckmaschinen Ag Kurzfarbwerk in einem Druckwerk einer Rotationsdruckmaschine
GB2398272B (en) * 2003-02-17 2006-03-22 Goss Graphic Systems Ltd Inking unit
DE102006004568A1 (de) * 2006-02-01 2007-08-02 Koenig & Bauer Aktiengesellschaft Kurzfarbwerk für eine Druckmaschine
CA2649107A1 (fr) * 2006-04-12 2007-10-25 Spinal Motion, Inc. Dispositif vertebral posterieur et procede associe
DE102006035504A1 (de) * 2006-07-31 2008-02-07 Koenig & Bauer Aktiengesellschaft Druckeinheit einer Rollenrotationsdruckmaschine
DE102008015531A1 (de) 2008-03-25 2009-10-01 Koenig & Bauer Aktiengesellschaft Kurzfarbwerk für eine Rotationsdruckmaschine
US9895876B2 (en) 2014-07-16 2018-02-20 Kba-Metalprint Gmbh Apparatus comprising a plurality of printing units for printing hollow elements
WO2016008700A1 (fr) 2014-07-16 2016-01-21 Kba-Metalprint Gmbh Unité d'encrage d'une unité d'impression
DE102014213804A1 (de) * 2014-07-16 2016-01-21 Kba-Metalprint Gmbh Farbwerk eines Druckwerks
US9895875B2 (en) 2014-07-16 2018-02-20 Kba-Metalprint Gmbh Printing unit having a plate cylinder and plate changer
EP3169521B1 (fr) 2014-07-16 2018-04-25 KBA-MetalPrint GmbH Dispositiv pour imprimer articles creux
WO2016008701A1 (fr) 2014-07-16 2016-01-21 Kba-Metalprint Gmbh Mécanisme d'encrage d'un groupe d'impression
DE102016201139B4 (de) 2016-01-27 2019-01-10 Kba-Metalprint Gmbh Vorrichtung zum Bedrucken von Hohlkörpern
DE102016201140B4 (de) 2016-01-27 2018-05-03 Kba-Metalprint Gmbh Verfahren zum Betrieb einer ein Segmentrad aufweisenden Vorrichtung zum Bedrucken von Hohlkörpern
DE102016201137B4 (de) 2016-01-27 2018-12-27 Kba-Metalprint Gmbh Vorrichtung zum Bedrucken von Hohlkörpern
DE102017201921B4 (de) 2017-02-08 2022-02-17 Koenig & Bauer Ag Vorrichtung zum Bedrucken von Hohlkörpern
DE102017202382A1 (de) 2017-02-15 2018-08-16 Kba-Metalprint Gmbh Verfahren zum Betrieb einer Vorrichtung zum Bedrucken von Hohlkörpern
DE102017202381A1 (de) 2017-02-15 2018-08-16 Kba-Metalprint Gmbh Verfahren zum Bedrucken von Hohlkörpern
DE102017202384A1 (de) 2017-02-15 2018-08-16 Kba-Metalprint Gmbh Verfahren zum Bedrucken von Hohlkörpern
DE102017206392A1 (de) 2017-04-13 2018-10-18 Koenig & Bauer Ag Segmentrad einer Vorrichtung zum Bedrucken von Hohlkörpern
DE102018201033B3 (de) 2018-01-24 2018-10-31 Koenig & Bauer Ag Vorrichtung zum Bedrucken von Hohlkörpern
DE102018121540A1 (de) 2018-09-04 2020-03-05 Koenig & Bauer Ag Vorrichtung zum Bedrucken von Hohlkörpern
DE102018121542B4 (de) 2018-09-04 2022-03-17 Koenig & Bauer Ag Vorrichtung zum Bedrucken von Hohlkörpern

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DE678543C (de) * 1937-10-06 1939-07-17 Carl Einar Larsen Verfahren und Vorrichtung zum Feuchten der Flachdruckformen einer Druckmaschine, namentlich beim Offsetdruck
US3203346A (en) * 1961-05-02 1965-08-31 Harris Intertype Corp Three cylinder convertible printing press
DE1561113A1 (de) * 1966-12-05 1970-02-12 Winkler Duennebier Kg Masch Feuchtwerk fuer Offsetdruckmaschinen
US3585932A (en) * 1968-06-07 1971-06-22 Wallace H Granger Automatic inking system for rotary newspaper printing press
GB1216686A (en) * 1968-07-18 1970-12-23 Standard Telephones Cables Ltd An electromagnet switching circuit
BE759110A (fr) * 1969-11-20 1971-05-18 Xerox Corp Methode et appareil d'encrage lithographique (
US3709147A (en) * 1970-12-03 1973-01-09 W Granger Ink transfer cylinder mounting with adjustable drive clutch
US3911815A (en) * 1972-05-02 1975-10-14 Roland Offsetmaschf Mechanism for dampening the printing plate of an offset printing press
CA1019637A (en) * 1972-05-09 1977-10-25 Dahlgren Manufacturing Company Method and apparatus for inking printing plates
US4041864A (en) * 1972-05-09 1977-08-16 Dahlgren Manufacturing Company Method and apparatus for inking printing plates
US4127067A (en) * 1974-02-15 1978-11-28 Dahlgren Harold P Method for inking printing plates
BE857275A (fr) * 1975-09-15 1977-11-14 Addressograph Multigraph Systeme et procede de fourniture d'encre
DE2654007B2 (de) * 1976-11-27 1980-02-07 Heinz-Joachim 7570 Baden- Baden Schinke Farbwerk für Büro-Offsetmaschinen
FR2397939A1 (fr) * 1977-07-22 1979-02-16 Chambon Machines Dispositif d'encrage pour impression a l'encre grasse
US4233898A (en) * 1978-06-23 1980-11-18 Dahlgren Manufacturing Company Reversible newspaper press
DE2902229A1 (de) * 1979-01-20 1980-07-24 Maschf Augsburg Nuernberg Ag Vorrichtung zum zufuehren von fluessigkeit zum plattenzylinder einer druckmaschine
DE2932105C2 (de) * 1979-08-08 1982-08-12 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbwerk und Feuchtwerk einer Offsetrotationsdruckmaschine mit zwei Farbwalzensträngen
EP0040192A1 (fr) * 1979-11-05 1981-11-25 Dahlgren Manufacturing Company Bac a encre portatif
DE3049009A1 (de) * 1980-12-24 1982-07-22 Color Metal AG, 8045 Zürich "einrichtung zum einfaerben einer druckform"
DE3117341C2 (de) * 1981-05-02 1988-07-07 Albert-Frankenthal Ag, 6710 Frankenthal Farbwerk
DE3134796C2 (de) * 1981-09-02 1983-12-01 Koenig & Bauer AG, 8700 Würzburg Farbwerk für eine Rotationsdruckmaschine

Also Published As

Publication number Publication date
ES8307591A1 (es) 1983-08-01
CA1208489A (fr) 1986-07-29
AU9000182A (en) 1983-05-05
EP0159474A1 (fr) 1985-10-30
AT384996B (de) 1988-02-10
EP0159474B1 (fr) 1989-01-04
ATA353882A (de) 1987-07-15
DE3270008D1 (en) 1986-04-24
DE3232780A1 (de) 1983-05-11
ES516981A0 (es) 1983-08-01
NO823608L (no) 1983-05-02
DE3232780C2 (de) 1986-02-06
EP0078444A1 (fr) 1983-05-11
NO159360C (no) 1988-12-21
NO159360B (no) 1988-09-12
DE3279324D1 (en) 1989-02-09
AU562988B2 (en) 1987-06-25
DK467382A (da) 1983-05-01
US4573407A (en) 1986-03-04

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