EP0779861B1 - Format variable rotationsdruckmaschine, insbesondere vom flexographischen typ - Google Patents

Format variable rotationsdruckmaschine, insbesondere vom flexographischen typ Download PDF

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Publication number
EP0779861B1
EP0779861B1 EP96922079A EP96922079A EP0779861B1 EP 0779861 B1 EP0779861 B1 EP 0779861B1 EP 96922079 A EP96922079 A EP 96922079A EP 96922079 A EP96922079 A EP 96922079A EP 0779861 B1 EP0779861 B1 EP 0779861B1
Authority
EP
European Patent Office
Prior art keywords
speed
printing
machine
transmission
machine according
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
EP96922079A
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English (en)
French (fr)
Other versions
EP0779861A1 (de
Inventor
Thierry Brame
Bernard Six
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.)
Komori Chambon SA
Original Assignee
Komori Chambon SA
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 Komori Chambon SA filed Critical Komori Chambon SA
Publication of EP0779861A1 publication Critical patent/EP0779861A1/de
Application granted granted Critical
Publication of EP0779861B1 publication Critical patent/EP0779861B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the present invention relates to a machine variable format rotary printing, including flexographic type.
  • Traditional flexographic machines include, for printing each color, a printing unit comprising a ink cylinder, a format cylinder, also called “printer shape", and a matching cylinder. These three cylinders are parallel to each other and tangent to each other and they are rotated by an appropriate control device.
  • a tablecloth of material to be printed which may have a thickness variable, scrolls between the printer form and the counterpart cylinder and it is printed during this passage with the ink which is deposited on the surface device of the printer form by the cylinder inker, which removes the ink from an inkwell.
  • the object of the present invention is to provide improvements to printing machines of the type above to remove each of the pinions of format associated with the different print forms of machine, while retaining the possibility of adjusting precisely the peripheral speed of the shape printer.
  • the present invention relates to a variable format rotary printing machine, in particular of the flexographic type, for printing, in one or several colors, a sheet of material passing by at through the machine, comprising, for each color to printing, a printing unit comprising a cylinder ink tangent to a cylinder constituting a shape printer, itself tangent to a cylinder counterpart, the sheet of material to be printed scrolling between the printer form and the counterpart cylinder, and a device for driving the cylinders comprising a main transmission driven in rotation by a motor and extending all along the machine (as described in patent EP-A-0352483), characterized in that the transmission main drive is directly coupled, through gear ratios predetermined transmission, on the one hand, to the cylinder inking and to the counterpart cylinder and, on the other hand, with the interposition of a differential controlled by a speed adjusting device, to a transmission secondary coupled, by means of engagement to constant relationship to the printer form of each unit printing.
  • the present invention not only allows adjust the speed of the shape printer but above all allows you to vary the rotation speed of the secondary transmission which drives it, within a range sufficient to allow to remove the format gear usually associated with the printer form.
  • the speed adjusting member controlling the differential consists of a variable speed drive mechanical.
  • This adjustment member can also be constituted by a correction motor whose speed is regulated according to the speed of the machine.
  • the flexographic machine according to the present invention which is shown in the drawing includes one or more printing units, depending on whether prints in one color or several colors on a sheet of material 1, such that a sheet of paper or cardboard, scrolling at a constant speed through the machine.
  • Each printing unit includes, in the manner usual, three cylinders, namely a cylinder inkpad 2, taking ink from an inkwell 3, a format cylinder or "printer form" 4 and one counterpart cylinder 5.
  • the three cylinders 2,4 and 5 extend horizontally, parallel to each other others, are tangent to each other and are trained in rotation by means described below.
  • the ink cylinder 2 which, in the drawing, rotates clockwise, is tangent to the printer form 4 which rotates in the opposite direction clockwise.
  • This printer form 4 is in turn tangent to the counterpart cylinder 5 which turns clockwise.
  • the sheet of material to be printed 1 pass between the form printer 4 and the counterpart cylinder 5 for receive a print made with the ink deposited by the ink cylinder 2 on the peripheral surface of the printer form 4.
  • Such printing machines are able well heard to ensure prints of various format.
  • the printing forms are usually provided with a toothed drive pinion, said pinion format, which is associated with each plate cylinder and that we change with this one.
  • the device according to the invention allows on the one hand to eliminate the format pinion by ensuring the order the rotational speed of the different shapes printers within speed ranges required to print different formats printing done on the same machine, and other share to adjust the precise setting of this speed in rigorous forks to compensate notably speed variations at the periphery of different cylinders due to different thicknesses of the tablecloth to be printed 1.
  • the drive device cylinders of each printing unit includes a main motor 6 which directly drives in rotation a main transmission, shown schematically by a main tree 7, also called “tangential tree”.
  • This "tangential" tree trains tangential units of the machine (debtors or positions varnishing or continuous embossing for example), one turn of the tangential tree 7 always representing the same length of a printed tablecloth.
  • This tangential tree 7 is coupled directly, via a gear train with appropriate transmission ratio, to the ink cylinder 2 so as to rotate it a predetermined peripheral speed v1.
  • the tree tangential 7 is also coupled to the cylinder counterpart 5, via a train gears with an appropriate transmission ratio and off a clutch 8.
  • the transmission ratio of gear train coupled to the counter cylinder 5 is chosen so that it also has the same peripheral speed v1 as that of the cylinder inkpad 2.
  • the printer form 4 is also driven by rotation, from the tangential shaft 7, by through a gear train with ratio of predetermined transmission and differential 9 controlled by a speed regulator 11.
  • the differential output 9 is connected to a transmission secondary, represented schematically by a second drive shaft 10, or cyclic shaft, which is coupled to each of the printing forms 4 of different printing units.
  • a coupling is provided by various engagement means which do not require any change when replacing a print form by a print form of a different diameter.
  • Such engagement means may thus be in particular constituted by universal joints, means of direct engagement or even gears whose number of teeth is fixed, i.e. independent of diameter of the printer shape.
  • the regulator of speed 11 acting on the differential 9 can be consisting of a variable speed drive with manual adjustment or even by a correction engine whose speed is regulated according to the speed of the machine.
  • Such a variable speed drive can be including mechanical, hydraulic or electronic.
  • the setting is ensured the peripheral speed of rotation of the cylinder plate 4 (depending on print size) and other apart from adjusting this speed precisely (depending in particular on the thickness of the ply 1) for avoid the rollers sliding on each other other. It is thus possible to adjust and then adjust, by means of the differential 9, the peripheral speed v2 of the printer form 4, so that it is equal to the peripheral speed v1 of the ink cylinder 2 and the counterpart cylinder 5, thereby removing any relative slippage in their contact areas.
  • the clutch 8 which is arranged between the shaft tangential 7 and the counter cylinder 5 has been provided to additionally take into account the thickness of the sheet of material to be printed 1. Indeed, for a sheet of thin material it is interesting to be able to train the cylinder counterpart 5 from the tangential tree 7 and in in this case the clutch 8 is engaged. However, in the in the case of a very thick sheet of material 1, it is preferable to disengage the counter cylinder 5.

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

Claims (6)

  1. Rotationsdruckmaschine mit variablem Format, insbesondere vom flexographischen Typ, um in einer Farbe oder mehreren Farben eine Materialbahn (1), die die Maschine durchläuft, zu bedrucken, aufweisend für jede Druckfarbe eine Druckeinheit mit einer Duktorwalze (2), die eine Walze (4) tangiert, die eine Druckform bildet, die selbst eine Gegenwalze (5) tangiert, wobei die zu bedruckende Materialbahn (1) zwischen der Druckform (4) und der Gegenwalze (5) läuft, und eine Vorrichtung zum Antrieb der Walzen (2, 4, 5) mit einem Hauptgetriebe (7), das durch einen Motor (6) in Drehung versetzt wird und sich über die gesamte Länge der Maschine erstreckt,
    dadurch gekennzeichnet, daß das Hauptantriebsgetriebe (7) direkt mittels Mehrfachübersetzungsgetrieben mit vorbestimmten Übersetzungsverhältnissen einerseits an die Duktorwalze (2) und an die Gegenwalze (5) gekuppelt ist und andererseits bei Zwischenschaltung eines Differentials (9), das durch ein Geschwindigkeitsregelorgan (11) gesteuert ist, an ein zweites Getriebe (10) gekuppelt ist, das durch Eingriffmittel mit konstantem Übersetzungsverhältnis an die Druckform (4) einer jeden Druckeinheit gekuppelt ist.
  2. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Eingriffmittel durch Kardanantriebe gebildet sind.
  3. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß das Geschwindigkeitsregelorgan (11), das das Differential (9) steuert, durch einen Regelantrieb gebildet ist.
  4. Maschine nach Anspruch 3,
    dadurch gekennzeichnet, daß der Regelantrieb ein mechanischer Antrieb ist.
  5. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß das Geschwindigkeitsregelorgan, das das Differential (9) steuert, durch einen Korrekturmotor gebildet ist, dessen Geschwindigkeit als Funktion von der Geschwindigkeit der Maschine reguliert wird.
  6. Maschine nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß eine ausrückbare Kupplung (8) in dem Mehrfachübersetzungsgetriebe zwischen dem Hauptgetriebe (7) und der Gegenwalze (5) zwischengeschaltet ist.
EP96922079A 1995-06-07 1996-06-07 Format variable rotationsdruckmaschine, insbesondere vom flexographischen typ Expired - Lifetime EP0779861B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9506709A FR2735067B1 (fr) 1995-06-07 1995-06-07 Machine d'impression rotative a format variable, notamment du type flexographique.
FR9506709 1995-06-07
PCT/FR1996/000866 WO1996040521A1 (fr) 1995-06-07 1996-06-07 Machine d'impression rotative a format variable, notamment du type flexographique

Publications (2)

Publication Number Publication Date
EP0779861A1 EP0779861A1 (de) 1997-06-25
EP0779861B1 true EP0779861B1 (de) 1999-10-27

Family

ID=9479706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96922079A Expired - Lifetime EP0779861B1 (de) 1995-06-07 1996-06-07 Format variable rotationsdruckmaschine, insbesondere vom flexographischen typ

Country Status (4)

Country Link
EP (1) EP0779861B1 (de)
DE (1) DE69604893D1 (de)
FR (1) FR2735067B1 (de)
WO (1) WO1996040521A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB735932A (en) * 1951-07-28 1955-08-31 Albert John Lindell Rotary printing machine
DE3825652A1 (de) * 1988-07-28 1990-02-01 Bhs Bayerische Berg Flexodruckmaschine
GB2283939A (en) * 1993-11-16 1995-05-24 Cobden Chadwick Printing machine motor drives

Also Published As

Publication number Publication date
FR2735067B1 (fr) 1997-07-25
WO1996040521A1 (fr) 1996-12-19
EP0779861A1 (de) 1997-06-25
DE69604893D1 (de) 1999-12-02
FR2735067A1 (fr) 1996-12-13

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