EP0061535B1 - Dispositif encreur pour machines à imprimer - Google Patents

Dispositif encreur pour machines à imprimer Download PDF

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Publication number
EP0061535B1
EP0061535B1 EP81110524A EP81110524A EP0061535B1 EP 0061535 B1 EP0061535 B1 EP 0061535B1 EP 81110524 A EP81110524 A EP 81110524A EP 81110524 A EP81110524 A EP 81110524A EP 0061535 B1 EP0061535 B1 EP 0061535B1
Authority
EP
European Patent Office
Prior art keywords
roller
transfer roller
inking unit
webs
ink
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
EP81110524A
Other languages
German (de)
English (en)
Other versions
EP0061535A1 (fr
Inventor
Rudi Junghans
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 AT81110524T priority Critical patent/ATE11754T1/de
Publication of EP0061535A1 publication Critical patent/EP0061535A1/fr
Application granted granted Critical
Publication of EP0061535B1 publication Critical patent/EP0061535B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/14—Applications of messenger or other moving transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers

Definitions

  • the invention relates to an inking unit for printing presses with an ink fountain roller rotating in the ink fountain, a transfer roller with a plurality of helically extending webs on the lateral surface and with a friction roller rotating at machine speed, on which the transfer roller rolls and transports the ink film into the inking mechanism.
  • a known embodiment of this type shows a transfer roller, on the outer surface of which there are provided a large number of narrow surface sections, the flanks of which merge helically into fillets. On the trailing side as seen in the direction of rotation, the surface sections merge into the fillets with sharp edges.
  • the high-speed transfer roller with the narrow surface sections takes up ink from the slower-running ink fountain roller and transfers it to the inking unit.
  • the disadvantage of this known embodiment is that only very narrow ink strips are transferred to the inking unit, which must then be distributed over the entire area by the rollers of the inking unit, for which purpose a large number of inking unit rollers are required.
  • Another major disadvantage of the known design is that the sharp trailing edges of the surface sections, for. B. when rolling between transfer roller and ink fountain roller uncontrolled color accumulates, which is completely randomly and uncontrollably given to the inking unit rollers after reaching an indefinite maximum, so that in this area there is an oversupply of color, which leads to color fluctuations on the printed product.
  • Another disadvantage of the known design is that the transfer roller is very difficult to wash, because it must be z. For example, every fillet can be washed out by hand when changing colors to remove all paint residues. It is also not possible to use the narrow surface sections to return too much ink present in the inking unit to the ink fountain.
  • the object of the invention is to provide a transfer roller in the inking unit for printing presses, which at high machine speeds transfers as flat a film of ink as possible into the inking unit or feeds ink back from the inking unit into the ink fountain and which enables the transfer of thinnest layers of ink from the ink fountain roller into the inking unit .
  • An advantage of the invention is that through the continuous contact system between the transfer roller and the friction roller there is an uninterrupted, continuous contact between the two rollers, so that the narrow strip of ink picked up by the webs is already rolled out into a wide strip of ink between these two rollers.
  • the uninterrupted contact surface also makes it easy to wash the transfer roller together with the inking unit, so that no ink residues can settle in the depressions provided between the webs. Due to the constant installation of the transfer roller on the ink fountain roller, it is still possible to return excess ink that is not required to be fed back from the inking unit into the ink fountain, so that splashing of the ink in the inking unit is avoided with certainty.
  • the drive of the transfer roller by means of spur gears arranged on both sides ensures a uniform ink transfer between the transfer roller and the friction roller, so that the braking effect of the ink fountain roller in the transfer roller cannot have a negative effect due to uncontrolled slip or stronger or weaker system on one side.
  • Another advantage of a transfer roller designed in this way is that, given the different peripheral speeds between the transfer roller and the ink fountain roller, due to the small width of the webs and the low contact pressure of the latter on the ink fountain roller, there is only minimal heating of the ink to be transferred to the inking unit, even at the highest Machine speed. On the other hand, the rest of the changes in shape are compensated or made ineffective by minimal heating due to the system pressure.
  • spur gears on both ends of the transfer roller according to claim 3 Due to the arrangement of spur gears on both ends of the transfer roller according to claim 3 and their drive via spur gears on the steering knuckles of the friction roller, a one-sided contact of the transfer roller by the gearing forces is excluded with certainty, so that evenly thin ink transfer is guaranteed over the length of the transfer roller . Fastening the spur gears via compression springs enables a uniform tooth engagement on both sides by simply pressing the transfer roller onto the friction roller.
  • the 1 has an ink fountain 1 with an ink metering device 2, in which an ink fountain roller 3 rotates.
  • a transfer roller 4 which is pivotally mounted about a friction roller 5, from which the ink film is transferred via inking rollers 6 to the plate cylinder, not shown.
  • the ink fountain roller 3 rotates at a relatively slow speed, while the rollers 4, 5 and 6 are driven at the peripheral speed of the plate cylinder, i. H. turn at full machine speed.
  • the ink fountain 1 and the subsequent rollers 3 to 6 are supported on both sides in machine side frames 7.
  • the friction roller 5 is rotatably supported on both sides with its stub axles 8, 9 via bearings 10, 11 in the machine side frames 7.
  • a drive spur gear 12 is fastened on the steering knuckle 8 outside the machine side frame.
  • 9.9 spur gears 13, 14 are mounted on the axle shaft 8, which are pressed by means of the screws 15 over the disks 16 and disc springs 17 via an intermediate ring 18 on the end faces of the friction roller 5, so that they drive the driving forces via frictional contact transferred to the transfer roller 4.
  • the transfer roller 4 in turn is pivotally mounted about the friction roller 5 via the levers 19, 20 such that the levers 19, 20 are mounted on the bearing holders 10, 11 via bushings 21.
  • the transfer roller 4 is mounted on needle bearings 22 on a non-rotating axis 23, which is guided on both sides in sliding bearings 24 in the levers 19, 20.
  • the pressure screws 25 take up a pressure spring in their interior, which press the pressure pin 26 outwards and thus press the transfer roller 4 against the friction roller 5 via the axis 23.
  • the pressure force can be adjusted in its strength via the pressure screws 25.
  • spur gears 27, 28 are attached to the transfer roller, which mesh with the spur gears 13, 14 on the friction roller.
  • the outer surface of the transfer roller 4 carries a coating 29 made of elastic material, for. B. Polyurethane 45 Shore. This coating 29 is provided on its outer surface with narrow webs 30 (Fig. 3, 4 and 5) which run helically. The webs are delimited on both sides by recesses 31 which merge into the webs with a small inclination 32 (FIG. 5).
  • a width of the webs 30 of approximately 2 mm was selected, the base of the recesses 31 being 0.2 mm deeper than the webs and the inclination 32 on both sides of the webs 30 being approximately 6 ° with a diameter of the transfer roller 4 of 85 mm and 12 bars on the circumference.
  • the web height is always less than 1 mm.
  • the number of ridges depends on the amount of the maximum color to be transferred or the maximum layer thickness of the color film conveyed by the doctor.
  • the contact force of the springs provided in the pressure screws 25 can be limited in the embodiment shown via stops, not shown, which are arranged on the levers 19, 20 in the direction of the friction roller 5 and z. B. enable precise adjustment of the positioning force via adjusting screws.
  • the transfer roller 4 can be pivoted via the levers 19, 20 from the ink fountain roller 3, for. B. to turn off the ink supply in the inking unit
  • the coating 29 on the transfer roller 4 advantageously consists of an elastic material with high wear resistance.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (8)

1. Dispositif encreur pour machines à imprimer, comportant un cylindre d'encrier tournant dans l'encrier, un cylindre de transfert, dont l'enveloppe cylindrique porte un revêtement (29) en une matière élastique, ce revêtement étant muni, sur son enveloppe cylindrique, de plusieurs nervures hélicoïdales, ainsi qu'un cylindre à friction tournant à la vitesse de la machine, contre lequel le cylindre de transfert roule et transfère le film d'encre dans le dispositif encreur, caractérisé en ce que le cylindre de transfert (4) roule, avec un contact à pression, contre le cylindre à friction (5), de sorte qu'il se produit aussi un contact continu entre les nervures (30), que le cylindre de transfert (4) peut être entraîné par le cylindre à friction (5) par l'intermédiaire de pignons droits (13, 14, 27, 28) et que les nervures (30) sont toujours appliquées avec une faible pression contre le cylindre d'encrier (3), qui tourne plus lentement.
2. Dispositif encreur suivant la revendication 1, caractérisé en ce que les nervures (30) ont une faible largeur, qu'elles sont limitées des deux côtés par des évidements (31) à faible pente (32) dont la surface de fond n'est que légèrement plus profonde que l'enveloppe cylindrique du revêtement (29).
3. Dispositif encreur suivant les revendications 1 et 2, caractérisé en ce que le cylindre de transfert (4) porte, sur ses deux faces frontales, des pignons droits (27, 28) se trouvant en prise avec des pignons droits (13, 14) qui sont sur les tourillons d'axe (8, 9) du cylindre à friction (5) et que les pignons droits (13, 14) du cylindre à friction (5) sont sous la pression de ressorts, en contact par friction avec le cylindre à friction (5).
4. Dispositif encreur suivant les revendications 1 à 3, caractérisé en ce que le cylindre de transfert (4) est appuyé, sous la pression de ressorts, contre le cylindre d'encrier (3) et que la force d'appui peut se limiter par des butées.
5. Dispositif encreur suivant les revendications 1 à 4, caractérisé en ce que le cylindre de transfert (4) peut s'escamoter par rapport au cylindre d'encrier (3).
6. Dispositif encreur suivant les revendications 1 à 5, caractérisé en ce que le revêtement (29) en matière élastique est très résistant à l'usure.
7. Dispositif encreur suivant les revendications 1 à 6, caractérisé en ce que la surface de fond des évidements (31) est moins d'1 mm plus profonde que les nervures (30) et que la matière élastique (29) a une dureté de 35-55 shore.
8. Dispositif encreur suivant les revendications 1 à 7, caractérisé en ce que les nervures (30) qui sont sur le revêtement (29) ont 2 mm de large, que la surface de fond des évidements (31) est de 0,2 mm plus profonde que les nervures (30) et que la pente (32) des évidements (31) est de 6° des deux côtés des nervures, pour un diamètre de 85 mm et 12 nervures sur le pourtour du cylindre de transfert (4).
EP81110524A 1981-03-13 1981-12-17 Dispositif encreur pour machines à imprimer Expired EP0061535B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110524T ATE11754T1 (de) 1981-03-13 1981-12-17 Farbwerk fuer druckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3109584 1981-03-13
DE19813109584 DE3109584A1 (de) 1981-03-13 1981-03-13 "fabwerk fuer druckmaschinen"

Publications (2)

Publication Number Publication Date
EP0061535A1 EP0061535A1 (fr) 1982-10-06
EP0061535B1 true EP0061535B1 (fr) 1985-02-13

Family

ID=6127096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110524A Expired EP0061535B1 (fr) 1981-03-13 1981-12-17 Dispositif encreur pour machines à imprimer

Country Status (5)

Country Link
US (1) US4449451A (fr)
EP (1) EP0061535B1 (fr)
JP (1) JPS57157759A (fr)
AT (1) ATE11754T1 (fr)
DE (1) DE3109584A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796530A (en) * 1987-06-01 1989-01-10 Pathfinder Graphic Associates Inc. Oscillating roll for printing presses
DE3720053C2 (de) * 1987-06-16 1994-01-13 Heidelberger Druckmasch Ag Farbwerk für Rotationsdruckmaschinen
DE3739893A1 (de) * 1987-11-25 1989-06-08 Heidelberger Druckmasch Ag Farbwerk fuer rotationsdruckmaschinen
US5632203A (en) * 1995-06-14 1997-05-27 Quad Graphics, Inc. Anti-ghosting roller
CN101925462B (zh) 2007-12-21 2013-03-27 顶点欧洲公司 使用网纹辊印刷基板的方法、用于印刷的网纹辊、以及印刷设备
CN105073425A (zh) * 2013-04-04 2015-11-18 小森公司 传墨辊及其制造方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD35642A (fr) *
US1207259A (en) * 1910-10-11 1916-12-05 Wood Newspaper Mach Corp Inking device for printing-presses.
US1737628A (en) * 1925-07-14 1929-12-03 Wood Newspaper Mach Corp Inking mechanism
DE563355C (de) * 1931-06-20 1932-11-04 Bing Werke Vorm Gebr Bing A G Umschaltvorrichtung zur UEbertragung einer geradlinigen in eine schwingende Bewegung bei Einrichtungen an elektrischen Spielzeugeisenbahnanlagen
US2369814A (en) * 1940-11-14 1945-02-20 Goss Printing Press Co Ltd Rotary printing press
US2363817A (en) * 1942-09-14 1944-11-28 Goss Printing Press Co Ltd Printing process and mechanism
US2406928A (en) * 1943-03-02 1946-09-03 Goss Printing Press Co Ltd Fountain inker drive mechanism
GB618609A (en) * 1945-07-11 1949-02-24 Goss Printing Press Co Ltd Improvements in or relating to continuous feed ink fountains for printing presses
US2613600A (en) * 1950-02-07 1952-10-14 Goss Printing Press Co Ltd Inking arrangement for printing presses
US3098437A (en) * 1960-12-29 1963-07-23 Miehle Goss Dexter Inc Inking arrangement for rotary printing presses
CH400194A (de) * 1962-06-16 1965-10-15 Maschf Augsburg Nuernberg Ag Farbwerk für Rotationsdruckmaschinen
DE1864740U (de) * 1962-11-02 1963-01-03 Koenig & Bauer Schnellpressfab Heberloses farbwerk an druckmaschinen.
FR1412401A (fr) * 1964-02-26 1965-10-01 Leipzig Veb Druckmasch Werke Cylindre de transmission d'encre, en particulier pour machines d'impression en relief et à plat
US3525182A (en) * 1968-02-29 1970-08-25 Libbey Owens Ford Co Edge grinding machine
US3563173A (en) * 1969-09-19 1971-02-16 Harris Intertype Corp Liquid-handling mechanism
US3651758A (en) * 1969-12-17 1972-03-28 Moore Business Forms Inc Ink transfer system
US4033262A (en) * 1976-03-18 1977-07-05 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Ink applicator for printing apparatus
DE2703424C2 (de) * 1977-01-28 1979-05-17 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Farbwerk für Offset-Druckmaschinen
US4130057A (en) * 1977-10-25 1978-12-19 Roland Offsetmaschinenfabrik Faber & Schleicher Ag. Dampening system for printing presses, particularly offset printing presses

Also Published As

Publication number Publication date
ATE11754T1 (de) 1985-02-15
EP0061535A1 (fr) 1982-10-06
JPS57157759A (en) 1982-09-29
DE3109584A1 (de) 1982-09-30
US4449451A (en) 1984-05-22

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