EP0778128B1 - Entraínement pour plusieurs cylindres de transfert d'une machine à imprimer - Google Patents

Entraínement pour plusieurs cylindres de transfert d'une machine à imprimer Download PDF

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Publication number
EP0778128B1
EP0778128B1 EP96119437A EP96119437A EP0778128B1 EP 0778128 B1 EP0778128 B1 EP 0778128B1 EP 96119437 A EP96119437 A EP 96119437A EP 96119437 A EP96119437 A EP 96119437A EP 0778128 B1 EP0778128 B1 EP 0778128B1
Authority
EP
European Patent Office
Prior art keywords
transfer
transfer cylinders
cylinders
transfer cylinder
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 - Lifetime
Application number
EP96119437A
Other languages
German (de)
English (en)
Other versions
EP0778128A1 (fr
Inventor
Anton Rodi
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.)
RODI, ANTON
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
Publication of EP0778128A1 publication Critical patent/EP0778128A1/fr
Application granted granted Critical
Publication of EP0778128B1 publication Critical patent/EP0778128B1/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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/20—Supports for bearings or supports for forme, offset, or impression cylinders
    • B41F13/21—Bearer rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to a device for driving several Transfer cylinder of a digital printing machine.
  • the invention is based, for Transfer cylinder of a digital printing press to create a particularly simple drive.
  • a digital press works so that a Print image applied to a first transfer cylinder becomes a hard surface for printing reasons has, from this to a second transfer cylinder is transferred from a jacket made of an elastic Has material, and from the second transfer cylinder is transferred to a substrate, the elastic Material for an even color transfer to one Substrate such as B. can nestle paper.
  • This corresponds to the first transfer cylinder the plate cylinder one Offset printing machine and corresponds to the second Transfer cylinder the rubber cylinder one Offset printing machine.
  • any Gear elements between the transfer cylinders of the digital printing machine and the Transfer cylinders are only on bearer rings coupled to each other, usually at the ends of the Transfer cylinders are arranged.
  • One of Transfer cylinder is powered by a printing press engine driven and takes the other transfer cylinder using the bearer rings.
  • the driven one Transfer cylinder is preferably the one that the Transfer ink to the substrate because of the multiple Torque requirement on this transfer cylinder.
  • the invention takes advantage of the fact that in a digital Printing machine on an absolute synchronization between the Transfer cylinders can be dispensed with.
  • One is enough relative synchronization, such that the phase shift along the transfer path of the ink due to the at least not inevitable slip of the bearer rings is larger than the desired print resolution.
  • no printing plate with the structure of the printed image is required, but every machine cycle a complete print image is produced, it has none Influence the print result if the minor ones Add up phase shifts over time. This also applies in the event that the transfer cylinder is not only one printing unit, but several printing units on the are driven according to the invention.
  • Transfer cylinders one of which is a rubber cylinder
  • the bearer rings ensure that the Circumferential speeds of the transfer cylinders approximately are the same, so that as little as possible at the transfer point Slip occurs.
  • the invention is not only for systems with two Transfer cylinders suitable, as described above, but also for a common drive of three or more Transfer cylinders.
  • one Printing unit of the middle are driven during the the other two can be taken away via bearer rings.
  • the transfer cylinders in a row arranged printing units can with each other by bearer rings be coupled, with only one of the transfer cylinders is driven.
  • Even with a series connection The slip can be caused by several bearer ring couplings make the bearer rings small enough that the accuracy of the Synchronization is within the tolerable range.
  • the digital printing unit shown in FIGS. 1 and 2 contains one first transfer cylinder 1 and a second Transfer cylinder 2 arranged parallel to each other are and touch each other on the circumference.
  • the Transfer cylinders 1, 2 are rotatable on not shown Side walls of a printing press stored.
  • At the extent of first transfer cylinder 1 are a write head 3 and a Inking unit 4 arranged, each over the entire Extend printing width.
  • the second transfer cylinder 2 has a drive shaft 5 which is connected to a motor 6 connected is.
  • the motor 6 is in the figures as on the Axis of the second transfer cylinder 2 lying shown, but can of course also on any be located elsewhere in the printing press and over Power transmission elements, e.g. B. a gear with Drive shaft 5 may be connected.
  • the second Transfer cylinder 2 also has one not separately drawn in jacket made of an elastic material like Rubber on. Adjacent to the second transfer cylinder 2 runs a conveyor belt 7 which is only partially drawn in, rest on the substrates 8 to be printed.
  • each Transfer cylinder 1, 2 laterally two axial Bearings 9, 10 flanged from case-hardened steel, which are each essentially the same diameter as the have corresponding transfer cylinders 1, 2.
  • the exact diameter of the transfer cylinder 1, 2 and Bearings 9, 10 are in accordance with the respective Material properties chosen so that between the Bearings 9 and 10 have a defined contact pressure is maintained while the transfer cylinders 1, 2 pressed against each other with a much lower force as will be explained in more detail later.
  • the transfer cylinders 1, 2 are in Fig. 1 and 2 with same diameters, but can also have different diameters.
  • the Transfer cylinder 1 and the bearer rings 9 larger Diameter than the transfer cylinder 2 and the Bearings 10 have.
  • the exact diameter ratio The bearer rings 9, 10 are on the special Settlement conditions on the transfer cylinders 1, 2 adjusted as will be described.
  • the conveyor belt 7 conveys the substrates 8 rectilinear in the direction of the arrow, the Substrates 8 along a straight contact point against the second transfer cylinder 2 are pressed.
  • the Motor 6 rotates the second transfer cylinder 2 so that its peripheral speed is equal to the conveying speed of the conveyor belt 7.
  • the second transfer cylinder 2 takes the first transfer cylinder 1 over the Bearings 9, 10 with, so that the transfer cylinder 1, 2nd against each other in the indicated arrow directions unroll.
  • the write head 3 describes the past rotating first transfer cylinder 1 with a latent Image that is developed on the inking unit 4. That developed Print image is on the second transfer cylinder 2nd transferred from it then transferred to a substrate 8 becomes. If necessary, you can contact the Transfer cylinders 1 or 2 cleaning devices for leftover, non-transferred color may be provided.
  • the bearer rings 9, 10 bring about a very precise Synchronization of the rotation of the transfer cylinders 1, 2.
  • On the way from the print head 3 to the transfer point on the second transfer cylinder 2 is a slip of the first Transfer cylinder 1 compared to the second Transfer cylinder 2 of only a few micrometers or less accessible, which is easily tolerable.
  • ⁇ Z is approximately five times as large as ⁇ S. Therefore, the contact pressure F S between the bearer rings must be at least five times the contact pressure F Z between the transfer cylinders, so that the friction between the bearer rings predominates and - apart from the slight slip - there is no relative movement between them.
  • the frictional resistance can, however, be subject to fluctuations in time during operation, e.g. B. because of uneven material properties or due to the material jam mentioned in front of the transfer point.
  • a much higher contact pressure F S between the bearer rings should be selected in practice than would be arithmetically calculated, for example ten or twenty times the force F Z with which the transfer cylinders are pressed against each other.
  • Cylinder bearings that can absorb these forces can be realize with reasonable effort, especially since the Ink transfer techniques used in digital presses come into consideration, often only relatively small Demand contact forces. There are also digital Printing press transmission techniques that practically no ins Require weight falling contact forces and with which the invention can thus be implemented particularly easily.
  • first transfer cylinder 1 and not the second Transfer cylinder 2 driven by a motor would be in an estimate of the contact pressure, the Torque requirement at the transfer point to the substrate 8 to consider.
  • the Transfer cylinders can drive be connected in series, or it can be from the Bearings of a transfer cylinder several more Transmission cylinders are driven, if necessary under Interposition of further bearer rings to cover distances to bridge between the transfer cylinders. On such a case is shown in FIG. 3.
  • the printing machine shown in Fig. 3 contains three Transfer cylinder 11, 12, 13, one behind the other a conveyor belt 14 are arranged, the substrates 15 in Arrow direction conveyed.
  • a motor 16 is with the middle one Transfer cylinder 12 connected, possibly via a not shown gearbox, and turns this in Arrow direction.
  • the transfer cylinders 11, 12 and 13 have as well as in the embodiment of FIGS. 1 and 2 side bearer rings on, with the interposition of two other bearers 17 in a row against each other be pressed.
  • Fig. 3 The principle shown in Fig. 3 is in many ways changeable and expandable. For one, instead of shown three printing units z. B. four or five printing units are driven. Furthermore, each of the printing units cannot have only one transfer cylinder 11, 12 and 13, respectively shown in Fig. 3, but each a system with two Transfer cylinders, as shown in Figs. 1 and 2, or still be more transfer cylinders. Even with such a chain of transfer cylinders connected with bearer rings the total slip remains between the bearer rings tolerable as it is still in the Order of magnitude of micrometers and therefore not noticeable on the raster accuracy of the printed images affects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)

Claims (6)

  1. Dispositif destiné à l'entraínement de plusieurs cylindres de transfert d'une machine à imprimer numérique,
    caractérisé
    en ce que seulement l'un (2; 12) desdits plusieurs cylindres de transfert (1, 2; 11, 12, 13) est relié à un moteur (6; 16), et en ce que lesdits plusieurs cylindres de transfert sont reliés mutuellement par des anneaux de cylindre (9, 10; 17) qui roulent réciproquement les uns sur les autres sous précontrainte.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'à chaque extrémité axiale de chacun desdits plusieurs cylindres de transfert (1, 2) est fixé axialement un anneau de cylindre (9, 10), en ce que les cylindres de transfert et les anneaux de cylindre correspondants roulent, deux par deux, réciproquement les uns sur les autres, et en ce que la précontrainte (Fs) entre les anneaux de cylindre de deux cylindres de transfert roulant réciproquement l'un sur l'autre, est sensiblement plus grande qu'une force de pression (Fz) entre ces deux cylindres de transfert, multipliée par le rapport du coefficient de frottement d'adhérence (µz) des surfaces en contact des cylindres de transfert, au coefficient de frottement d'adhérence (µs) des surfaces en contact des anneaux de cylindre.
  3. Dispositif selon la revendication 2, caractérisé en ce que le rapport des diamètres des anneaux de cylindre (9, 10) de deux cylindres de transfert (1, 2) roulant réciproquement l'un sur l'autre est rendu proche du rapport des circonférences, actives en fonctionnement, des cylindres de transfert.
  4. Dispositif selon la revendication 2 ou la revendication 3, caractérisé en ce que l'un (2) de deux cylindres de transfert (1, 2) roulant réciproquement l'un sur l'autre, présente une enveloppe périphérique en un matériau élastique, pour le transfert d'encre d'impression sur un substrat (8).
  5. Dispositif selon la revendication 4, caractérisé en ce que le moteur (6) est relié au cylindre de transfert (2) qui présente une enveloppe périphérique en un matériau élastique.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que des cylindres de transfert (11, 12, 13) de plusieurs groupes d'impression de la machine d'impression, sont reliés par l'intermédiaire d'anneaux de cylindre (17), seul l'un des cylindres de transfert (12) étant relié au moteur (16).
EP96119437A 1995-12-04 1996-12-04 Entraínement pour plusieurs cylindres de transfert d'une machine à imprimer Expired - Lifetime EP0778128B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545114 1995-12-04
DE19545114A DE19545114A1 (de) 1995-12-04 1995-12-04 Antrieb für mehrere Übertragungszylinder einer Druckmaschine

Publications (2)

Publication Number Publication Date
EP0778128A1 EP0778128A1 (fr) 1997-06-11
EP0778128B1 true EP0778128B1 (fr) 2000-04-26

Family

ID=7779101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96119437A Expired - Lifetime EP0778128B1 (fr) 1995-12-04 1996-12-04 Entraínement pour plusieurs cylindres de transfert d'une machine à imprimer

Country Status (5)

Country Link
US (1) US5809883A (fr)
EP (1) EP0778128B1 (fr)
JP (1) JPH09174803A (fr)
AU (1) AU721243B2 (fr)
DE (2) DE19545114A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1107240C (zh) * 1996-03-15 2003-04-30 日本写真印刷株式会社 薄膜形成装置
DE19927555A1 (de) * 1999-06-16 2000-12-21 Koenig & Bauer Ag Einrichtung zum Einstellen von Schmitzringen
EP1440800A2 (fr) 1999-01-18 2004-07-28 Koenig & Bauer Aktiengesellschaft Entraínement de cylindres d'une machine rotative d'impression
DE19911180C2 (de) * 1999-03-12 2001-02-01 Koenig & Bauer Ag Druckwerk für eine Rotationsdruckmaschine
AU2002223459A1 (en) * 2000-11-29 2002-06-11 Koenig And Bauer Aktiengesellschaft Cylinder comprising a bearer ring for a rotary printing press
DE10327490B4 (de) * 2003-06-17 2006-09-21 Koenig & Bauer Ag Druckeinheit einer Rotationsdruckmaschine
ES1065654Y (es) * 2006-07-27 2008-01-16 Rotatek S A Cilindro con aros de rodadura para maquinas de impresion offset
DE102009001338A1 (de) * 2009-03-05 2010-09-09 Manroland Ag Druckwerk für eine Offsetdruckmaschine, sowie Verfahren zur Veränderung einer Druckwerkseinstellung
DE102013110459A1 (de) * 2012-10-23 2014-04-24 manroland sheetfed GmbH Druckmaschine und Verfahren zum Betreiben einer Druckmaschine

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE207359C (fr) *
DE7112211U (de) * 1971-07-08 Solberg A Antrieb von Druckwalzen durch bieg same Wellen
DE54800C (de) * W. SCHULTHEISS in Ehingen a. D., Württemberg Bienenschöpfapparat für Dzierzonstöcke
DE215903C (fr) *
FR419203A (fr) * 1910-05-20 1910-12-29 Societe De La Manufacture D Indiennes Emile Zundel Procédé permettant de produire par impression, sur tissus, des effets changeants et des effets imitant le tissé en plusieurs nuances
US1171490A (en) * 1913-07-02 1916-02-15 Wood Newspaper Mach Corp Bearing device for printing-couples.
US1338347A (en) * 1915-06-25 1920-04-27 Wood Newspaper Mach Corp Adjustable bearer for printing-couples
US2362069A (en) * 1942-06-01 1944-11-07 Hoe & Co R Printing cylinder bearer
US3138097A (en) * 1962-03-14 1964-06-23 Harris Intertype Corp Printing press and method
US3196788A (en) * 1962-03-19 1965-07-27 Michle Goss Dexter Inc Bearer ring desing for four cooperating cylinders
US3331873A (en) * 1965-04-23 1967-07-18 Allied Chem Removal of chlorine from liquid phosgene with activated carbon
DE2802153C2 (de) * 1978-01-19 1986-08-07 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Schmitzringanordnung
DD207359A1 (de) * 1982-04-21 1984-02-29 Polygraph Leipzig Druckwerkszylinderantrieb, insbesondere fuer rollenrotations-offsetdruckmaschinen
DE4401300A1 (de) * 1993-02-09 1994-08-11 Grapha Holding Ag Vorrichtung zur Verarbeitung von band- resp. blattförmigem Material

Also Published As

Publication number Publication date
AU721243B2 (en) 2000-06-29
DE59605036D1 (de) 2000-05-31
EP0778128A1 (fr) 1997-06-11
AU7412596A (en) 1997-06-12
US5809883A (en) 1998-09-22
JPH09174803A (ja) 1997-07-08
DE19545114A1 (de) 1997-06-05

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