EP0321360A1 - Offset printing press operating in tandem - Google Patents

Offset printing press operating in tandem Download PDF

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Publication number
EP0321360A1
EP0321360A1 EP88403227A EP88403227A EP0321360A1 EP 0321360 A1 EP0321360 A1 EP 0321360A1 EP 88403227 A EP88403227 A EP 88403227A EP 88403227 A EP88403227 A EP 88403227A EP 0321360 A1 EP0321360 A1 EP 0321360A1
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EP
European Patent Office
Prior art keywords
cylinder
cylinders
plate
blanket cylinder
printing
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.)
Granted
Application number
EP88403227A
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German (de)
French (fr)
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EP0321360B1 (en
Inventor
Nicolas Kakko-Chiloff
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.)
Conseil Vente Service
Usinage Montage et Assistance Technique UMAT
Original Assignee
Conseil Vente Service
Usinage Montage et Assistance Technique UMAT
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Priority to AT88403227T priority Critical patent/ATE61285T1/en
Publication of EP0321360A1 publication Critical patent/EP0321360A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/02—Arrangements of indicating devices, e.g. counters
    • B41F33/025—Counters
    • 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
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/46—Printing units for inserting latest news
    • 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
    • B41F7/08—Rotary lithographic machines for offset printing using one transfer cylinder co-operating with several forme cylinders for printing on sheets or webs, e.g. sampling of colours on one transfer cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange

Definitions

  • the present invention relates to an offset printing apparatus operating in tandem.
  • the object of the present invention is to solve these various problems by providing a tandem offset device of particularly simple design and safe operation by virtue of a judicious arrangement of the various printing, inking and wetting elements on the one hand and the use of recent technical means such as semi-continuous inking, alcohol wetting on a touchscreen, the functions of which reduce the need for adjustment during printing.
  • this offset printing apparatus operating in tandem comprising a frame at the top of which are mounted an inking device and a wetting device for applying respectively an ink film and a film of wetting liquid on a horizontal axis touching cylinder rotatably mounted on the frame and at the bottom of which are mounted for rotation a blanket cylinder and a counterpart cylinder tangent to each other and between which passes a sheet to be printed and whose axes are extend horizontally and transversely, that is to say perpendicular to the web to be printed, the axis of the blanket cylinder and that of the touch cylinder being located in the same vertical plane, characterized in that it comprises two plate cylinder cylinders with horizontal and transverse axes disposed respectively on either side of the vertical plane passing through the axes of the touching and blanket cylinders at an intermediate level between these two cylinders, - a support for the two plate cylinders, which is pivotally mounted around the axis of the blanket cylinder, - two launching cylinders with horizontal and transverse
  • the apparatus according to the invention offers the advantage that there is no interruption of the pressure on the web during the passage of printing from one series to the next and that there is also no discontinuity in anchoring and anchoring.
  • This apparatus comprises, at its upper part in the usual manner, an inking device 3 with semi-continuous ink intake, an alcohol wetting device 4, a large diameter inking and wetting touch cylinder 5, two tables 6, 7 traversed transversely for the distribution of the ink and for erasing the streaks and carryovers and a group of loading and distributing rollers 8 tangent to each other and with the touching cylinder 5. All these cylinders have horizontal axes and transverse, that is to say perpendicular to the direction of travel of the sheet 2 and they are rotatably mounted at their ends on the uprights of the frame 1 directly or by means of parts forming supports.
  • the device comprises two cylinders 9, 10 of horizontal and transverse axes respectively disposed on either side of the vertical transverse plane P passing through the axis of the touching cylinder 5 which each carry an offset plate which can be supplied with ink and water by the upper assembly ending with the touching cylinder 5.
  • the two plate cylinders 9, 10 are located below the touching cylinder 5 and they are brought into contact alternately with this following touching cylinder 5 the series to be printed. In the position illustrated in fig. 1, the right plate cylinder 10 is in contact with the touch cylinder 5 and it therefore intervenes for the printing of the series in progress, while the left plate cylinder 9 is moved away from the touch cylinder 5 in the position of waiting.
  • This counterpart cylinder 13 is pressed against the blanket cylinder 11 by mechanical pneumatic or hydraulic means such as vertical cylinders 14 so that the printing deposited by the offset plate of the plate cylinder 10 which is in the printing position, is perfectly transferred with a good strike by the blanket 12 on the tablecloth to be printed 2.
  • the arrangement which has been described above corresponds to that of a three-cylinder offset printing machine which is conventional, except that the cylinder blanket 11 is fixed in space while in known offset devices it is generally the plate cylinder 9 or 10 which is fixed.
  • the blanket cylinder 11 is rotated from a transverse shaft 15 by means of a gear train 16, 17, 18 as shown in FIG. 2.
  • the gear 16 is linked directly to the inking group via the shaft 15, the rotation of which is ensured by the main shaft of the machine.
  • the gear 17 is an intermediate gear while the gear 18 is fixed to the blanket cylinder 11.
  • the pitch diameter of the gear 18 corresponds exactly to the diameter of cords 19 integral with the blanket cylinder 11 and therefore to the diameter of the format developed by printing.
  • the pitch diameter of the gear 16 is determined so that the linear speed of the inking exactly matches the linear speed of the printing.
  • the plate cylinder 10 which intervenes for the printing of the current series is rotated from the blanket cylinder 11 by means of a gear 21 integral with the blanket cylinder 11 and a gear 22 secured to the plate cylinder 10, gears whose pitch diameters are identical to that of the gear 18. Furthermore, each of the plate cylinders 9, 10 is secured to cords 23 which are supported in position d printing on the cords 19 of the blanket cylinder 11. The other plate cylinder 9 which is in the standby position is not rotated and the gear 24 of which it is integral and which is identical to the gear 22 is not engaged with gear 21 of the blanket cylinder 11. In addition, it is under pressure neither with the touch cylinder 5 nor with the blanket cylinder 11.
  • a starter cylinder 25 lined with rubber.
  • Another launching cylinder 26 is disposed on the other side of the blanket cylinder 11 and it is symmetrical with the launching cylinder 25, with respect to the vertical and transverse plane passing through the axes of the touching cylinder 5 and blanket cylinder 11. the cylinder plate holder 10 which is active for printing is then moved away from the second launcher cylinder 26.
  • the two launching cylinders 25, 26 are rotated from the blanket cylinder 11 by means of a transmission mechanism 27 comprising a chain 28 passing over a toothed wheel 29 secured to the shaft of the blanket cylinder 11 on return toothed wheels 31 mounted on the frame 1 of the apparatus and on a toothed wheel 32 secured to the input shaft 33 of an electromagnetic clutch 34 whose output shaft 35 is coupled to the shaft 36 of the launching cylinder 25 or 26.
  • a transmission mechanism 27 comprising a chain 28 passing over a toothed wheel 29 secured to the shaft of the blanket cylinder 11 on return toothed wheels 31 mounted on the frame 1 of the apparatus and on a toothed wheel 32 secured to the input shaft 33 of an electromagnetic clutch 34 whose output shaft 35 is coupled to the shaft 36 of the launching cylinder 25 or 26.
  • Each of the launching cylinders 25, 26 further comprises a differential 37 corrected by a servomotor 38.
  • the cinematographic chain thus formed is calculated so that the peripheral speed of each launching cylinder 25, 26 is identical to that of the blanket
  • the two plate-carrying cylinders 9, 10 are mounted together at each of their ends on the same pendulum 39 which is articulated around the axis of the blanket cylinder 11 and which rests on a pair of vertical cylinders 41 and 42.
  • the two plate cylinders 9, 10 are carried respectively by slides 43 which are pushed under pressure by respective jacks 44, 45 carried by the pendulum 39.
  • These jacks 44, 45 act on respective first rocker arms 46, 47 with two opposite arms articulated around axes 48, 49 and acting by their second arms on the slides 43.
  • These slides 43 may or may not come into contact with respective upper stops 51, 52 so as to fix the positions of the plate-carrying cylinders 9, 10 when they are in the active printing position.
  • stops 51, 52 can be adjusted horizontally and longitudinally by means of a horizontal threaded rod 53 driven in rotation by any suitable means.
  • Each of the jacks 44, 45 pushes the slide 43 downwards so that the cords 23 of the plate cylinder 9, 10 come into contact with the cords 19 of the blanket cylinder 11, this contact corresponding to the normal transfer pressure between the plate and the blanket.
  • the right jack 45 is pressurized and each slide 43 carrying the right plate cylinder 10 is in abutment against the right stop 52.
  • the other left jack 44 is depressurized and the slides 43 carrying the door cylinder - left plate 9 are spread below the left stop 51.
  • All the jacks 41, 42 and the stops 51, 52 are arranged and adjusted so that, when the pendulum 39 comes to rest on one of these stops 51 or 52 and the blanket cylinder 11 rolls cord on cord with the plate cylinder 9 or 10, the contact of this plate cylinder with the touch cylinder 5 corresponds to good inking and good wetting.
  • the blanket cylinder 11 has on its shaft an encoder 54 with three functions, namely transmission of a counting pulse, transmission of a cyclic code per revolution of the printing cylinder and transmission of an incremental pulse train .
  • the counting pulse controls an electronic counter 55 whose function is to deliver sequence pulses to preset accounts.
  • Cyclic code pulses synchronize the operation of an electronic tracking device 56 with the machine cycle.
  • This machine locating device also receives pulses emitted by detectors 57, 58 actuated by cams 59, 61 carried by the plate-carrying cylinders 9, 10.
  • the electronic information coming from the counter 55 and from the electronic locating device 56 are introduced into a programmable controller 62 which governs all the sequential commands of the device.
  • the encoder 54 activates the electronic counter 55 of the down-counting type, the recycling of which is automatic at the passage of zero on a preset account corresponding to the numbers of formats to be printed.
  • This counter 55 emits a pulse when it reaches a preset account at a value which allows all the sequences of the change of series to have time to be done. This pulse is emitted for example 250 cycles before the end of the drawing of the current series (zero of the counter). It will be assumed that the right plate cylinder 10 is then in the printing position, as shown in FIG. 1 and that the left plate cylinder 9, then stopped, has been fitted with its new plate. The left plate cylinder 9 is then supported on the left starter cylinder 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Soil Working Implements (AREA)
  • Printing Methods (AREA)
  • Color Electrophotography (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

The present invention relates to an offset printing press operating in tandem. This press is characterised in that it comprises two plate cylinders (9, 10) of horizontal and transverse axes, a support (39) for the two plate cylinders (9, 10), which is mounted tiltably about the axis of the blanket cylinder (11), two driving cylinders (25, 26) of horizontal and transverse axes, arranged respectively a little below and towards the outside of each plate cylinder (9, 10), and means for controlling the tilting movement of the support (39) for the plate cylinders (9, 10), for putting each of these cylinders under pressure and for driving the driving cylinders (25, 26) in rotation. <IMAGE>

Description

La présente invention concerne un appareil d'impression offset fonctionnant en tandem.The present invention relates to an offset printing apparatus operating in tandem.

Il est courant dans les impressions commerciales effec­tuées par des appareils d'impression rotatifs du type blanchet de personnaliser les imprimés. Cette personnali­sation est obtenue au moyen du basculement en marche d'un groupe d'impression sur un autre. Les groupes d'impres­sion fonctionnent alors en tandem, c'est-à-dire que pendant qu'un groupe effectue l'impression, l'autre groupe est arrêté pour permettre le changement du cliché et ceci sans arrêter la ligne d'impression qui continue son travail. Des arrêts fréquents sur une telle ligne d'impression seraient en effet très dommageables par suite du temps perdu et de la gâche de papier dûe aux démarrages.It is common in commercial printing done by rotary blanket printing machines to personalize the printed matter. This personalization is obtained by switching on from one printing unit to another. The printing units then work in tandem, that is to say that while one group is performing the printing, the other group is stopped to allow the printing of the plate and this without stopping the printing line which continues its work. Frequent stops on such a printing line would indeed be very damaging as a result of the time lost and the waste of paper due to start-ups.

Avec de telles installations, lorsque le groupe d'impres­sion se trouvant à l'arrêt a été équipé d'un nouveau cliché et lorsque le tirage de personnalisation arrive à sa fin sur l'autre groupe d'impression en service, on procède au lancement et à la mise en pression en repérage du groupe nouvellement équipé alors que le groupe dont le tirage est terminé est décalé en pression et débrayé pour permettre le remplacement de son cliché. Ce type de machine d'impression a déjà été développé et fait généra­lement appel à des techniques d'impression typographique ou flexographique qui sont faciles à mettre en oeuvre. Toutefois, les clichés typographiques et flexographiques sont onéreux et nécessitent une installation de photogra­vure que ne possèdent généralement pas les imprimeurs utilisant des appareils offset. Le souhait actuel des imprimeurs est donc que ces machines dites "tandem" soient équipées du procédé d'impression offset dont les plaques sont bon marché et faciles à exécuter. Toutefois, la mise en oeuvre d'une impression offset est compliquée car elle implique un réglage d'encre délicat, un réglage du mouillage (équilibre eau/encre), un réglage précis de la touche, une préparation des plaques et des blanchets avant l'impression et un réglage précis de la frappe.With such installations, when the printing unit that is at a standstill has been fitted with a new plate and when the personalization printing comes to an end on the other printing unit in service, we proceed with launching and when pressurized to locate the newly equipped group while the group whose printing is finished is shifted in pressure and disengaged to allow the replacement of its plate. This type of printing machine has already been developed and generally uses typographic or flexographic printing techniques which are easy to implement. However, letterpress and flexographic printing are expensive and require a photoengraving installation that printers generally do not use offset machines. The current wish of printers is therefore that these so-called "tandem" machines be equipped with the offset printing process, the plates of which are inexpensive and easy to execute. However, the implementation of an offset printing is complicated because it involves a delicate ink adjustment, an adjustment of the wetting (water / ink balance), a precise adjustment of the key, a preparation of the plates and blankets before printing and precise adjustment of the strike.

La présente invention a pour but de résoudre ces divers problèmes en procurant un appareil tandem offset de conception particulièrement simple et d'un fonctionnement sûr grâce à une disposition judicieuse des différents éléments d'impression, d'encrage et de mouillage d'une part et à l'utilisation de moyens techniques récents tels qu'encrage semi-continu, mouillage à alcool sur toucheur dont les fonctionnements réduisent les nécessités d'ajus­tement en cours de tirage.The object of the present invention is to solve these various problems by providing a tandem offset device of particularly simple design and safe operation by virtue of a judicious arrangement of the various printing, inking and wetting elements on the one hand and the use of recent technical means such as semi-continuous inking, alcohol wetting on a touchscreen, the functions of which reduce the need for adjustment during printing.

A cet effet, cet appareil d'impression offset fonction­nant en tandem comprenant un bâti à la partie supérieure duquel sont montés un dispositif d'encrage et un disposi­tif de mouillage pour appliquer respectivement un film d'encre et un film de liquide de mouillage sur un cylin­dre toucheur d'axe horizontal monté à rotation sur le bâti et à la partie inférieure duquel sont montés à rotation un cylindre porte-blanchet et un cylindre contre- partie tangents entre eux et entre lesquels passe une nappe à imprimer et dont les axes s'étendent horizon­talement et transversalement, c'est-à-dire perpendiculai­rement à la nappe à imprimer, l'axe du cylindre porte-­blanchet et celui du cylindre toucheur étant situés dans un même plan vertical, caractérisé en ce qu'il comprend
- deux cylindres porte-plaque d'axes horizontaux et transversaux disposés respectivement de part et d'autre du plan vertical passant par les axes des cylindres toucheur et porte-blanchet à un niveau intermédiaire entre ces deux cylindres,
- un support des deux cylindres porte-plaque, lequel est monté basculant autour de l'axe du cylindre porte-­blanchet,
- deux cylindres lanceurs d'axes horizontaux et transver­saux disposés respectivement un peu en dessous et vers l'extérieur par rapport à chaque cylindre porte-plaque et,
- des moyens de commande du mouvement de basculement du support des cylindres porte-plaque de mise en pression de chacun de ces cylindres et de l'entraînement des cylin­dres lanceurs en rotation de manière à amener alternati­vement chacun des deux cylindres porte-plaque, soit en position d'impression, dans laquelle il est en contact sous pression à la fois avec le cylindre toucheur supé­rieur et le cylindre porte-blanchet inférieur, après l'avoir préalablement lancé en rotation à la même vitesse périphérique que celle du cylindre porte-blanchet et l'avoir calé en position angulaire, soit en position d'attente à l'arrêt dans laquelle le cylindre porte-­plaque est écarté des cylindres toucheur et porte-­blanchet et est en appui sur le cylindre lanceur corres­pondant pour permettre le changement de son cliché.For this purpose, this offset printing apparatus operating in tandem comprising a frame at the top of which are mounted an inking device and a wetting device for applying respectively an ink film and a film of wetting liquid on a horizontal axis touching cylinder rotatably mounted on the frame and at the bottom of which are mounted for rotation a blanket cylinder and a counterpart cylinder tangent to each other and between which passes a sheet to be printed and whose axes are extend horizontally and transversely, that is to say perpendicular to the web to be printed, the axis of the blanket cylinder and that of the touch cylinder being located in the same vertical plane, characterized in that it comprises
two plate cylinder cylinders with horizontal and transverse axes disposed respectively on either side of the vertical plane passing through the axes of the touching and blanket cylinders at an intermediate level between these two cylinders,
- a support for the two plate cylinders, which is pivotally mounted around the axis of the blanket cylinder,
- two launching cylinders with horizontal and transverse axes respectively disposed a little below and towards the outside with respect to each plate cylinder and,
means for controlling the tilting movement of the support for the plate-bearing cylinders for pressurizing each of these cylinders and for driving the launching cylinders in rotation so as to bring each of the two plate-cylinders alternately, either by printing position, in which it is in pressure contact with both the upper touch cylinder and the lower blanket cylinder, after having previously launched it in rotation at the same peripheral speed as that of the blanket cylinder and having it fixed in angular position, that is to say in the standstill position in which the plate cylinder is moved away from the touching and blanket cylinders and is supported on the corresponding launcher cylinder to allow the change of its photograph .

L'appareil suivant l'invention offre l'avantage qu'il n'y a aucune interruption de la pression sur la nappe lors du passage de l'impression d'une série à la suivante et qu'également il n'y a alors aucune discontinuité de l'ancrage et du mouillage.The apparatus according to the invention offers the advantage that there is no interruption of the pressure on the web during the passage of printing from one series to the next and that there is also no no discontinuity in anchoring and anchoring.

On décrira ci-après à titre d'exemple non limitatif une forme d'exécution de la présente invention en référence au dessin annexé sur lequel :

  • La fig. 1 est une vue en coupe verticale et longitudi­nale, dans le sens de défilement de la nappe imprimée d'une appareil d'impression tandem en offset suivant l'invention.
  • La fig. 2 est une vue en coupe faite suivant la ligne II-II de la fig. 1.
  • La fig. 3 est une vue en coupe faite suivant la ligne III-III de la fig. 1.
  • La fig. 4 est une vue en coupe faite suivant la ligne IV-IV de la fig. 1.
  • La fig. 5 est un schéma synoptique du circuit de com­mande.
An embodiment of the present invention will be described below by way of nonlimiting example with reference to the attached drawing in which:
  • Fig. 1 is a view in vertical and longitudinal section, in the direction of travel of the printed web of a tandem offset printing apparatus according to the invention.
  • Fig. 2 is a sectional view taken along line II-II of FIG. 1.
  • Fig. 3 is a sectional view taken along line III-III of FIG. 1.
  • Fig. 4 is a sectional view taken along line IV-IV of FIG. 1.
  • Fig. 5 is a block diagram of the control circuit.

L'appareil d'impression tandem en offset suivant l'inven­tion qui est représenté sur la fig. 1 comprend un bâti 1 constitué de deux montants verticaux et longitudinaux, c'est-à-dire parallèles au sens de défilement d'une nappe 2 qui passe horizontalement à travers l'appareil, à sa partie inférieure en se déplaçant de la gauche vers la droite sur la fig. 1. Cet appareil comporte à sa partie supérieure de la manière habituelle un dispositif d'en­crage 3 à prise d'encre semi-continue, un dispositif de mouillage à alcool 4, un cylindre toucheur d'encrage et de mouillage 5 de grand diamètre, deux tables 6, 7 baladées transversalement pour la répartition de l'encre et d'effacement des stries et des reports et un groupe de rouleaux chargeurs et distributeurs 8 tangents entre eux et avec le cylindre toucheur 5. Tous ces cylindres ont des axes horizontaux et transversaux , c'est-à-dire perpendiculaires à la direction de défilement de la nappe 2 et ils sont montés à rotation à leurs extrémités sur les montants du bâti 1 directement ou par l'intermédiaire de pièces formant supports.The tandem offset printing apparatus according to the invention which is shown in FIG. 1 comprises a frame 1 consisting of two vertical and longitudinal uprights, that is to say parallel to the direction of travel of a sheet 2 which passes horizontally through the device, at its lower part moving from the left towards the right in fig. 1. This apparatus comprises, at its upper part in the usual manner, an inking device 3 with semi-continuous ink intake, an alcohol wetting device 4, a large diameter inking and wetting touch cylinder 5, two tables 6, 7 traversed transversely for the distribution of the ink and for erasing the streaks and carryovers and a group of loading and distributing rollers 8 tangent to each other and with the touching cylinder 5. All these cylinders have horizontal axes and transverse, that is to say perpendicular to the direction of travel of the sheet 2 and they are rotatably mounted at their ends on the uprights of the frame 1 directly or by means of parts forming supports.

Dans sa partie inférieure, l'appareil comprend deux cylindres 9, 10 d'axes horizontaux et transversaux disposés respectivement de part et d'autre du plan vertical transversal P passant par l'axe du cylindre toucheur 5 qui portent chacun une plaque offset qui peut être alimentée en encre et en eau par l'ensemble supé­rieur se terminant par le cylindre toucheur 5. Les deux cylindres porte-plaque 9, 10 sont situés en dessous du cylindre toucheur 5 et ils sont mis alternativement en contact avec ce cylindre toucheur 5 suivant les séries devant être imprimées. Dans la position illustrée sur la fig. 1, le cylindre porte-plaque droit 10 est en contact avec le cylindre toucheur 5 et il intervient donc pour l'impression de la série en cours, alors que le cylindre porte-plaque gauche 9 est écarté du cylindre toucheur 5 en position d'attente.In its lower part, the device comprises two cylinders 9, 10 of horizontal and transverse axes respectively disposed on either side of the vertical transverse plane P passing through the axis of the touching cylinder 5 which each carry an offset plate which can be supplied with ink and water by the upper assembly ending with the touching cylinder 5. The two plate cylinders 9, 10 are located below the touching cylinder 5 and they are brought into contact alternately with this following touching cylinder 5 the series to be printed. In the position illustrated in fig. 1, the right plate cylinder 10 is in contact with the touch cylinder 5 and it therefore intervenes for the printing of the series in progress, while the left plate cylinder 9 is moved away from the touch cylinder 5 in the position of waiting.

En dessous des deux cylindres porte-plaque 9, 10 est disposé un cylindre 11 d'axe horizontal et transversal fixé dans l'espace contenu dans le plan vertical et transversal P, ce cylindre 11 étant recouvert par un blanchet 12. Sous le cylindre porte-blanchet 11 est disposé un cylindre de contre-partie 13, d'axe horizontal et transversal et la nappe à imprimer 2 défile entre le cylindre porte-blanchet 11 et le cylindre contre-partie 13. Ce cylindre contre-partie 13 est pressé contre le cylindre porte-blanchet 11 par des moyens mécaniques pneumatiques ou hydrauliques tels que des vérins verti­caux 14 de telle façon que l'impression déposée par la plaque offset du cylindre porte-plaque 10 qui se trouve en position d'impression, soit parfaitement transférée avec une bonne frappe par le blanchet 12 sur la nappe à imprimer 2.Below the two plate cylinders 9, 10 is arranged a cylinder 11 of horizontal and transverse axis fixed in the space contained in the vertical and transverse plane P, this cylinder 11 being covered by a blanket 12. Under the cylinder blanket 11 is arranged a counterpart cylinder 13, of horizontal and transverse axis and the printing web 2 runs between the blanket cylinder 11 and the counterpart cylinder 13. This counterpart cylinder 13 is pressed against the blanket cylinder 11 by mechanical pneumatic or hydraulic means such as vertical cylinders 14 so that the printing deposited by the offset plate of the plate cylinder 10 which is in the printing position, is perfectly transferred with a good strike by the blanket 12 on the tablecloth to be printed 2.

La disposition qui a été décrite ci-dessus correspond à celle d'un appareil d'impression offset à trois cylindres qui est classique, sauf en ce que le cylindre porte-­ blanchet 11 est fixé dans l'espace alors que dans les appareils offset connus c'est généralement le cylindre porte-plaque 9 ou 10 qui est fixé.The arrangement which has been described above corresponds to that of a three-cylinder offset printing machine which is conventional, except that the cylinder blanket 11 is fixed in space while in known offset devices it is generally the plate cylinder 9 or 10 which is fixed.

Le cylindre porte-blanchet 11 est entraîné en rotation à partir d'un arbre transversal 15 par l'intermédiaire d'un train d'engrenage 16, 17, 18 comme il est représenté sur la fig. 2. L'engrenage 16 est lié directement au groupe d'encrage par l'intermédiaire de l'arbre 15 dont la rotation est assurée par l'arbre principal de la machine. L'engrenage 17 est un engrenage intermédiaire tandis que l'engrenage 18 est fixé au cylindre porte-blanchet 11. Le diamètre primitif de l'engrenage 18 correspond exactement au diamètre de cordons 19 solidaires du cylindre porte-­blanchet 11 et par conséquent au diamètre du format développé par l'impression. Le diamètre primitif de l'engrenage 16 est déterminé de telle manière que la vitesse linéaire de l'encrage corresponde exactement à la vitesse linéaire de l'impression.The blanket cylinder 11 is rotated from a transverse shaft 15 by means of a gear train 16, 17, 18 as shown in FIG. 2. The gear 16 is linked directly to the inking group via the shaft 15, the rotation of which is ensured by the main shaft of the machine. The gear 17 is an intermediate gear while the gear 18 is fixed to the blanket cylinder 11. The pitch diameter of the gear 18 corresponds exactly to the diameter of cords 19 integral with the blanket cylinder 11 and therefore to the diameter of the format developed by printing. The pitch diameter of the gear 16 is determined so that the linear speed of the inking exactly matches the linear speed of the printing.

Comme on peut le voir sur la fig. 3, le cylindre porte-­plaque 10 qui intervient pour l'impression de la série en cours est entraîné en rotation à partir du cylindre porte-blanchet 11 par l'intermédiaire d'un engrenage 21 solidaire du cylindre porte-blanchet 11 et d'un engrenage 22 solidaire du cylindre porte-plaque 10, engrenages dont les diamètres primitifs sont identiques à celui de l'engrenage 18. Par ailleurs, chacun des cylindres porte-plaque 9, 10 est solidaire de cordons 23 qui sont en appui en position d'impression sur les cordons 19 du cylindre porte-blanchet 11. L'autre cylindre porte-plaque 9 qui est en position d'attente n'est pas entraîné en rotation et l'engrenage 24 dont il est solidaire et qui est identique à l'engrenage 22 n'est pas en prise avec l'engrenage 21 du cylindre porte-blanchet 11. De plus, il est en pression ni avec le cylindre toucheur 5 ni avec le cylindre porte-blanchet 11. Par contre, il est en appui sur un cylindre lanceur 25 garni de caoutchouc. Un autre cylindre lanceur 26 est disposé de l'autre côté du cylindre porte-blanchet 11 et il est symétrique du cylindre lanceur 25, par rapport au plan vertical et transversal passant par les axes des cylindres toucheur 5 et porte-blanchet 11. le cylindre porte-plaque 10 qui est actif pour l'impression est alors écarté du second cylindre lanceur 26.As can be seen in fig. 3, the plate cylinder 10 which intervenes for the printing of the current series is rotated from the blanket cylinder 11 by means of a gear 21 integral with the blanket cylinder 11 and a gear 22 secured to the plate cylinder 10, gears whose pitch diameters are identical to that of the gear 18. Furthermore, each of the plate cylinders 9, 10 is secured to cords 23 which are supported in position d printing on the cords 19 of the blanket cylinder 11. The other plate cylinder 9 which is in the standby position is not rotated and the gear 24 of which it is integral and which is identical to the gear 22 is not engaged with gear 21 of the blanket cylinder 11. In addition, it is under pressure neither with the touch cylinder 5 nor with the blanket cylinder 11. On the other hand, it is in abutment on a starter cylinder 25 lined with rubber. Another launching cylinder 26 is disposed on the other side of the blanket cylinder 11 and it is symmetrical with the launching cylinder 25, with respect to the vertical and transverse plane passing through the axes of the touching cylinder 5 and blanket cylinder 11. the cylinder plate holder 10 which is active for printing is then moved away from the second launcher cylinder 26.

Les deux cylindres lanceurs 25, 26 sont entraînés en rotation à partir du cylindre porte-blanchet 11 par l'intermédiaire d'un mécanisme de transmission 27 compre­nant une chaîne 28 passant sur une roue dentée 29 soli­daire de l'arbre du cylindre porte-blanchet 11 sur des roues dentées de renvoi 31 montées sur le bâti 1 de l'appareil et sur une roue dentée 32 solidaire de l'arbre d'entrée 33 d'un embrayage électromagnétique 34 dont l'arbre de sortie 35 est accouplé à l'arbre 36 du cylin­dre lanceur 25 ou 26. Chacun des cylindres lanceurs 25, 26 comporte en outre un différentiel 37 corrigé par un servomoteur 38. La chaîne cinématographique ainsi consti­tuée est calculée de façon que la vitesse périphérique de chaque cylindre lanceur 25, 26 soit identique à celle du cylindre porte-blanchet 11, lorsque le servomoteur 38 est arrêté.The two launching cylinders 25, 26 are rotated from the blanket cylinder 11 by means of a transmission mechanism 27 comprising a chain 28 passing over a toothed wheel 29 secured to the shaft of the blanket cylinder 11 on return toothed wheels 31 mounted on the frame 1 of the apparatus and on a toothed wheel 32 secured to the input shaft 33 of an electromagnetic clutch 34 whose output shaft 35 is coupled to the shaft 36 of the launching cylinder 25 or 26. Each of the launching cylinders 25, 26 further comprises a differential 37 corrected by a servomotor 38. The cinematographic chain thus formed is calculated so that the peripheral speed of each launching cylinder 25, 26 is identical to that of the blanket cylinder 11, when the booster 38 is stopped.

Les deux cylindres porte-plaque 9, 10 sont montés ensem­ble à chacune de leurs extrémités sur un même balancier 39 qui est articulé autour de l'axe du cylindre porte-­blanchet 11 et qui repose sur une paire de vérins verti­caux 41 et 42. Sur le balancier 39 les deux cylindres porte-plaque 9, 10 sont portés respectivement par des coulisseaux 43 qui sont poussés en pression par des vérins respectifs 44, 45 portés par le balancier 39. Ces vérins 44, 45 agissent sur des premiers bras de bascu­leurs respectifs 46, 47 à deux bras opposés articulés autour d'axes 48, 49 et agissant par leurs seconds bras sur les coulisseaux 43. Ces coulisseaux 43 peuvent venir ou non en contact avec des butées supérieures respectives 51, 52 de manière à fixer les positions des cylindres porte-plaque 9, 10 lorsqu'ils sont en position active d'impression. Ces butées 51, 52 peuvent être réglées dans le sens horizontal et longitudinal au moyen d'une tige horizontale filetée 53 entraînée en rotation par tout moyen approprié. Chacun des vérins 44, 45 repousse le coulisseau 43 vers le bas de manière que les cordons 23 du cylindre porte-plaque 9, 10 viennent en contact avec les cordons 19 du cylindre porte-blanchet 11, ce contact correspondant à la pression normale de transfert d'impres­sion entre la plaque et le blanchet. Dans le cas illustré sur la fig. 1, le vérin droit 45 est mis sous pression et chaque coulisseau 43 portant le cylindre porte-plaque droit 10 est en appui contre la butée droite 52. Par contre l'autre vérin gauche 44 est hors pression et les coulisseaux 43 portant le cylindre porte-plaque gauche 9 sont écartés en dessous de la butée gauche 51.The two plate-carrying cylinders 9, 10 are mounted together at each of their ends on the same pendulum 39 which is articulated around the axis of the blanket cylinder 11 and which rests on a pair of vertical cylinders 41 and 42. On the pendulum 39 the two plate cylinders 9, 10 are carried respectively by slides 43 which are pushed under pressure by respective jacks 44, 45 carried by the pendulum 39. These jacks 44, 45 act on respective first rocker arms 46, 47 with two opposite arms articulated around axes 48, 49 and acting by their second arms on the slides 43. These slides 43 may or may not come into contact with respective upper stops 51, 52 so as to fix the positions of the plate-carrying cylinders 9, 10 when they are in the active printing position. These stops 51, 52 can be adjusted horizontally and longitudinally by means of a horizontal threaded rod 53 driven in rotation by any suitable means. Each of the jacks 44, 45 pushes the slide 43 downwards so that the cords 23 of the plate cylinder 9, 10 come into contact with the cords 19 of the blanket cylinder 11, this contact corresponding to the normal transfer pressure between the plate and the blanket. In the case illustrated in fig. 1, the right jack 45 is pressurized and each slide 43 carrying the right plate cylinder 10 is in abutment against the right stop 52. On the other hand, the other left jack 44 is depressurized and the slides 43 carrying the door cylinder - left plate 9 are spread below the left stop 51.

L'ensemble des vérins 41, 42 et des butées 51, 52 est disposé et réglé de façon que, lorsque le balancier 39 vient en appui sur l'une de ces butées 51 ou 52 et que le cylindre porte-blanchet 11 roule cordon sur cordon avec le cylindre porte-plaque 9 ou 10, le contact de ce cylindre porte-plaque avec le cylindre toucheur 5 corres­ponde à un bon encrage et à un bon mouillage.All the jacks 41, 42 and the stops 51, 52 are arranged and adjusted so that, when the pendulum 39 comes to rest on one of these stops 51 or 52 and the blanket cylinder 11 rolls cord on cord with the plate cylinder 9 or 10, the contact of this plate cylinder with the touch cylinder 5 corresponds to good inking and good wetting.

Le cylindre porte-blanchet 11 comporte sur son arbre un codeur 54 à trois fonctions, à savoir émission d'une impulsion de comptage, émission d'un code cyclique par tour de cylindre d'impression et émission d'un train d'impulsion incrémentale. L'impulsion de comptage com­mande un compteur électronique 55 dont la fonction est de délivrer des impulsions de séquence à des comptes préré­glés. Les impulsions du code cyclique synchronisent le fonctionnement d'un dispositif de repérage électronique 56 avec le cycle de la machine . Ce dispositif de repé­rage de la machine reçoit par ailleurs des impulsions émises par des détecteurs 57, 58 actionnés par des cames 59, 61 portés par les cylindres porte-plaque 9, 10. Les informations électroniques provenant du compteur 55 et du dispositif de repérage électronique 56 sont introduites dans un automate programmable 62 qui régit toutes les commandes séquentielles de l'appareil.The blanket cylinder 11 has on its shaft an encoder 54 with three functions, namely transmission of a counting pulse, transmission of a cyclic code per revolution of the printing cylinder and transmission of an incremental pulse train . The counting pulse controls an electronic counter 55 whose function is to deliver sequence pulses to preset accounts. Cyclic code pulses synchronize the operation of an electronic tracking device 56 with the machine cycle. This machine locating device also receives pulses emitted by detectors 57, 58 actuated by cams 59, 61 carried by the plate-carrying cylinders 9, 10. The electronic information coming from the counter 55 and from the electronic locating device 56 are introduced into a programmable controller 62 which governs all the sequential commands of the device.

Le fonctionnement de l'appareil suivant l'invention est le suivant : le codeur 54 active le compteur électronique 55 du type à décomptage dont le recyclage est automatique au passage du zéro sur un compte préréglé correspondant aux nombres de formats à imprimer. Ce compteur 55 émet une impulsion lorsqu'il atteint un compte préréglé à une valeur qui permet à toutes les séquences du changement de série d'avoir le temps de se faire. Cette impulsion est émise par exemple 250 cycles avant la fin du tirage de la série en cours (zéro du compteur). On supposera qu'alors le cylindre porte-plaque droit 10 est en position d'impres­sion, comme il est représenté sur la fig. 1 et que le cylindre porte-plaque gauche 9, alors arrêté, a été équipé de son nouveau cliché. Le cylindre porte-plaque gauche 9 se trouve alors en appui sur le cylindre lanceur gauche 25.The operation of the apparatus according to the invention is as follows: the encoder 54 activates the electronic counter 55 of the down-counting type, the recycling of which is automatic at the passage of zero on a preset account corresponding to the numbers of formats to be printed. This counter 55 emits a pulse when it reaches a preset account at a value which allows all the sequences of the change of series to have time to be done. This pulse is emitted for example 250 cycles before the end of the drawing of the current series (zero of the counter). It will be assumed that the right plate cylinder 10 is then in the printing position, as shown in FIG. 1 and that the left plate cylinder 9, then stopped, has been fitted with its new plate. The left plate cylinder 9 is then supported on the left starter cylinder 25.

L'impulsion émise par le compteur électronique 55, 250 cycles avant la fin du tirage, met en service l'embrayage 34 et par conséquent ceci provoque l'entraînement en rotation du cylindre lanceur gauche 25 et du cylindre porte-plaque gauche 9 qui lui est tangent. La vitesse périphérique de ces deux cylindres augmente jusqu'à ce qu'elle atteigne la valeur de la vitesse périphérique du cylindre porte-blanchet 11. Cette même impulsion met en route le dispositif de repérage électronique 56 dont la fonction est de rechercher, grâce aux impulsions émises par la came 61 et le détecteur 58 et par action du servomoteur 38 sur le différentiel 37, un repérage parfait entre le cylindre porte-plaque gauche 9 et le cylindre porte-blanchet 11. Lorsque ce repérage est atteint, c'est-à-dire lorsque les deux cylindres 9 et 11 sont calés angulairement l'un par rapport à l'autre dans les positions correctes pour l'impression, le dispositif de repérage électronique 56 émet un signal de synchroni­sation qui provoque le déclenchement d'un ensemble d'opérations en séquence. Ces opérations successives sont les suivantes :

  • 1) engrènement du cylindre porte-plaque gauche 9 avec le cylindre porte-blanchet 11 au moyen du vérin 44 alimenté par le fond. La pression de ce vérin 44 est à ce moment préréglée à une pression suffisante pour assurer l'engrè­nement des deux cylindres 9 et 11 ensemble, mais toute­fois insuffisante pour les mettre en pression.
  • 2) désactivation de l'embrayage 34 et arrêt du fonction­nement du dispositif de repérage électronique 56.
  • 3) lorsque le compteur 55 arrive au compte zéro et par conséquent à son recyclage pour un nouveau tirage, on commande le relâchement de la pression dans les vérins droit 42 et 45, la mise en pression du vérin gauche 41, ce qui provoque alors le basculement du balancier 39 dans le sens des aiguilles d'une montre autour de l'axe du cylindre porte-blanchet 11 et par conséquent la venue en contact du cylindre porte-plaque gauche 9 avec le cylin­dre toucheur 5, et la mise en pression forte du vérin 44. A partir de ce moment, l'impression continue avec le cylindre porte-plaque gauche 9 qui a été basculé en position d'impression dans laquelle il est en contact en pression à la fois contre le cylindre toucheur supérieur 5 et le cylindre porte-blanchet inférieur 11, et ce sans que la ligne d'impression ait été arrêtée. Cette impres­sion est transférée sans interruption par le même blanchet 12 qui servait pour l'impression précédente et ceci sans interruption dans la distribution de l'encre et de l'eau. Le cylindre porte-plaque droit 10 se trouve, par suite du relâchement du vérin 45, dégrené du cylindre porte-blanchet 11, il s'arrête de tourner et vient en appui sur le cylindre lanceur droit 26. Son cliché peut donc être changé et un nouveau cycle d'impression pourra recommencer ultérieurement.
The pulse emitted by the electronic counter 55, 250 cycles before the end of the draw, activates the clutch 34 and consequently this causes the rotation of the left starter cylinder 25 and the left plate cylinder 9 which is tangent. The peripheral speed of these two cylinders increases until it reaches the value of the peripheral speed of the blanket cylinder 11. This same pulse activates the electronic tracking device 56 whose function is to search, thanks to the pulses emitted by cam 61 and detector 58 and by action of the servomotor 38 on the differential 37, a perfect location between the left plate cylinder 9 and the blanket cylinder 11. When this location is reached, that is to say when the two cylinders 9 and 11 are angularly calibrated l relative to each other in the correct positions for printing, the electronic tracking device 56 emits a synchronization signal which causes the triggering of a set of operations in sequence. These successive operations are as follows:
  • 1) meshing of the left plate cylinder 9 with the blanket cylinder 11 by means of the jack 44 fed from the bottom. The pressure of this jack 44 is at this time preset to a pressure sufficient to ensure the engagement of the two cylinders 9 and 11 together, but however insufficient to put them under pressure.
  • 2) disabling the clutch 34 and stopping the operation of the electronic tracking device 56.
  • 3) when the counter 55 arrives at the zero count and consequently at its recycling for a new draw, the pressure is released in the right cylinders 42 and 45, the pressurization of the left cylinder 41, which then causes the tilting of the pendulum 39 in a clockwise direction around the axis of the blanket cylinder 11 and consequently the coming into contact of the left plate cylinder 9 with the touching cylinder 5, and the strong pressurization of the jack 44. From this moment, printing continues with the left plate cylinder 9 which has been switched to the printing position in which it is in pressure contact both against the upper touch cylinder 5 and the lower blanket cylinder 11, without the printing line having been stopped. This print is transferred continuously by the same blanket 12 which was used for the previous printing and this without interruption in the distribution of ink and water. The right plate cylinder 10 is, as a result of the release of the jack 45, skewed from the blanket cylinder 11, it stops rotating and comes to rest on the right starter cylinder 26. Its picture can therefore be changed and a new printing cycle can start again later.

Claims (7)

1 - Appareil d'impression offset fonctionnant en tandem comprenant un bâti à la partie supérieure duquel sont montés un dispositif d'encrage et un dispositif de mouillage pour appliquer respectivement un film d'encre et un film de liquide de mouillage sur un cylindre toucheur d'axe horizontal monté à rotation sur le bâti, et à la partie inférieure duquel sont montés à rotation un cylindre porte-blanchet et un cylindre contre-partie tangents entre eux, et entre lesquels passe une nappe à imprimer et dont les axes s'étendent horizontalement et transversalement c'est-à-dire perpendiculairement à la nappe à imprimer, l'axe du cylindre porte-blanchet et celui du cylindre toucheur étant situés dans un même plan vertical, caractérisé en ce qu'il comprend:
- deux cylindres porte-plaque (9, 10) d'axes horizontaux et transversaux disposés respectivement de part et d'autre du plan vertical (P) passant par les axes des cylindres toucheur (5) et porte-blanchet (11), à un niveau intermédiaire entre ces deux cylindres,
- un support (39) des deux cylindres porte-plaque (9, 10) lequel est monté basculant autour de l'axe du cylindre porte-blanchet (11),
- deux cylindres lanceurs (25, 26) d'axes horizontaux et transversaux disposés respectivement un peu en dessous et vers l'extérieur par rapport à chaque cylindre porte-­plaque (9, 10) et des moyens de commande du mouvement de basculement du support (39) des cylindres porte-plaque (9, 10) de mise en pression de chacun de ces cylindres et de l'entraînement des cylindres lanceurs (25, 26) en rotation de manière à amener alternativement chacun des deux cylindres porte-plaque (9, 10) soit en position d'impression, dans laquelle il est en contact sous pression à la fois avec le cylindre toucheur supérieur (5) et le cylindre porte-blanchet inférieur (11) après l'avoir préalablement lancé en rotation à la même vitesse périphérique que celle du cylindre porte-blanchet (11) et l'avoir calé en position angulaire, soit en position d'attente à l'arrêt dans laquelle le cylindre porte-­plaque (9, 10) est écarté des cylindres toucheur (5) et porte-blanchet (11) et est en appui sur le cylindre lanceur correspondant (25, 26) pour permettre le change­ment de son cliché.1 - Offset printing device operating in tandem comprising a frame at the top of which are mounted an inking device and a wetting device for applying respectively a film of ink and a film of wetting liquid to a touch cylinder d horizontal axis rotatably mounted on the frame, and at the bottom of which are rotatably mounted a blanket cylinder and a counterpart cylinder tangent to each other, and between which passes a sheet to be printed and whose axes extend horizontally and transversely, that is to say perpendicular to the sheet to be printed, the axis of the blanket cylinder and that of the touch cylinder being located in the same vertical plane, characterized in that it comprises:
- two plate-carrying cylinders (9, 10) of horizontal and transverse axes disposed respectively on either side of the vertical plane (P) passing through the axes of the touching (5) and blanket (11) cylinders, to an intermediate level between these two cylinders,
- a support (39) of the two plate-carrying cylinders (9, 10) which is pivotally mounted around the axis of the blanket cylinder (11),
- two launching cylinders (25, 26) of horizontal and transverse axes respectively disposed a little below and outward relative to each plate cylinder (9, 10) and means for controlling the tilting movement of the support (39) of the plate-carrying cylinders (9, 10) for pressurizing each of these cylinders and of the drive of the starter cylinders (25, 26) in rotation so as to bring each of the two plate-carrying cylinders alternately ( 9, 10) either in the printing position, in which it is in contact under pressure with both the upper touch cylinder (5) and the lower blanket cylinder (11) after having previously rotated it at the same peripheral speed as that of the blanket cylinder (11) and having set it in the angular position, or in the standby standstill position in which the plate-holding cylinder (9, 10) is spaced from the touching (5) and blanket (11) cylinders and is supported on the corresponding throwing cylinder (25, 26) to allow the change of his picture. 2 - Appareil suivant la revendication 1, caractérisé en ce que le cylindre porte-blanchet (11) est entraîné en rotation à partir d'un arbre transversal (15), par l'intermédiaire d'un train d'engrenages (16, 17, 18) un premier engrenage (16) est lié directement au groupe d'encrage, par l'intermédiaire de l'arbre (15) dont la rotation est assurée par l'arbre principal de la machine, un deuxième engrenage (17) est un engrenage intermédiaire tandis que le troisième engrenage (18) est fixé au cylindre porte-blanchet (11) et son diamètre primitif correspond exactement au diamètre de cordons (19) soli­daires du cylindre porte-blanchet (11) et par conséquent au diamètre du format développé par l'impression, et le cylindre porte-plaque (9, 10), qui intervient pour l'impression de la série en cours, est entraîné en rotation à partir du cylindre porte-blanchet (11), par l'intermédiaire d'un engrenage (21) solidaire du cylindre porte-blanchet (11) et d'un engrenage (22) solidaire du cylindre porte-plaque (10), ces engrenages (2, 22) ayant un même diamètre primitif identique à celui du troisième engrenage (18), chacun des cylindres porte-plaque (9, 10) étant solidaire de cordons (23) qui sont en appui, en position d'impression, sur les cordons (19) du cylindre porte-blanchet (11).2 - Apparatus according to claim 1, characterized in that the blanket cylinder (11) is rotated from a transverse shaft (15), via a gear train (16, 17 , 18) a first gear (16) is directly linked to the inking group, via the shaft (15) whose rotation is ensured by the main shaft of the machine, a second gear (17) is an intermediate gear while the third gear (18) is fixed to the blanket cylinder (11) and its original diameter corresponds exactly to the diameter of cords (19) integral with the blanket cylinder (11) and therefore to the diameter of the format developed by printing, and the plate cylinder (9, 10), which is used for printing the current series, is rotated from the blanket cylinder (11), via '' a gear (21) integral with the blanket cylinder (11) and a gear (22) integral with the cylinder plate (10), these gears (2, 22) having the same pitch diameter identical to that of the third gear (18), each of the plate cylinders (9, 10) being integral with cords (23) which are in abutment, in the printing position, on the cords (19) of the blanket cylinder (11). 3 - Appareil suivant l'une quelconque des revendications précédentes, caractérisé en ce que les deux cylindres lanceurs (25, 26) sont entraînés en rotation à partir du cylindre porte-blanchet (11) par l'intermédiaire d'un mécanisme de transmission (27) comprenant une chaîne (28) passant sur une roue dentée (29) solidaire de l'arbre du cylindre porte-blanchet (11), sur des roues dentées de renvoi (31) montées sur le bâti (1) de l'appareil et sur une roue dentée (32) solidaire de l'arbre d'entrée (33) d'un embrayage électromagnétique (34) dont l'arbre de sortie (35) est accouplé à l'arbre (36) du cylindre lanceur (25, 26), chacun des cylindres lanceurs (25, 26) comportant en outre un différentiel (37) corrigé par un servomoteur (38).3 - Apparatus according to any one of the preceding claims, characterized in that the two launching cylinders (25, 26) are rotated from the blanket cylinder (11) via a transmission mechanism ( 27) comprising a chain (28) passing over a toothed wheel (29) integral with the blanket cylinder shaft (11), on return toothed wheels (31) mounted on the frame (1) of the device and on a toothed wheel (32) integral with the input shaft (33) of an electromagnetic clutch (34) whose output shaft (35) is coupled to the shaft (36) of the starter cylinder (25 , 26), each of the launching cylinders (25, 26) further comprising a differential (37) corrected by a servomotor (38). 4 - Appareil suivant l'une quelconque des revendications précédentes, caractérisé en ce que les deux cylindres porte-plaque (9, 10) sont montés ensemble, à chacune de leurs extrémités, sur un même balancier (39) qui est articulé autour de l'axe du cylindre porte-blanchet (11) et qui repose sur une paire de vérins verticaux (41, 42), sur le balancier (39) les deux cylindres porte-plaque (9, 10) étant portés respectivement par des coulisseaux (43) qui sont poussés en pression par des vérins respectifs 44, 45) portés par le balancier (39).4 - Apparatus according to any one of the preceding claims, characterized in that the two plate cylinders (9, 10) are mounted together, at each of their ends, on the same balance (39) which is articulated around the 'axis of the blanket cylinder (11) and which rests on a pair of vertical cylinders (41, 42), on the balance (39) the two plate cylinders (9, 10) being carried respectively by sliders (43 ) which are pushed under pressure by respective cylinders 44, 45) carried by the balance (39). 5 - Appareil suivant la revendication 4, caractérisé en ce que les vérins (44, 45) agissent sur des premiers bras de basculeurs respectifs (46, 47) à deux bras opposés, articulés autour d'axes (48, 49) et agissant par leurs seconds bras sur les coulisseaux (43) et ces coulisseaux (43) pouvant venir ou non en contact avec des butées supérieures respectives (51, 52) de manière à fixer la position de chacun des cylindres porte-plaque (9, 10) lorsqu'il se trouve en position active d'impression.5 - Apparatus according to claim 4, characterized in that the jacks (44, 45) act on respective first rocker arms (46, 47) with two opposite arms, articulated around axes (48, 49) and acting by their second arms on the slides (43) and these slides (43) may or may not come into contact with respective upper stops (51, 52) so as to fix the position of each of the plate cylinders (9, 10) when 'it is in the active printing position. 6 - Appareil suivant la revendication 5, caractérisé en ce que les butées (51, 52) sont réglables dans le sens horizontal et longitudinal au moyen d'une tige horizon­tale filetée (53) entraînée en rotation.6 - Apparatus according to claim 5, characterized in that the stops (51, 52) are adjustable in the horizontal and longitudinal direction by means of a threaded horizontal rod (53) driven in rotation. 7 - Appareil suivant l'une quelconque des revendications précédentes, caractérisé en ce que le cylindre porte-­blanchet (11) comporte sur son arbre un codeur (54) à trois fonctions, à savoir émission d'une impulsion de comptage, émission d'un code cyclique par tour de cylin­dre d'impression et émission d'un train d'impulsion incrémentale, l'impulsion de comptage commande un comp­teur électronique (55) dont la fonction est de délivrer des impulsions de séquence à des comptes préréglés, les impulsions du code cyclique synchronisent le fonctionne­ment d'un dispositif de repérage électronique (56) avec le cycle de la machine qui reçoit par ailleurs des impulsions émises par des détecteurs (57, 58) actionnés par des cames (59, 61) portés par les cylindres porte-­plaque (9, 10).7 - Apparatus according to any one of the preceding claims, characterized in that the blanket cylinder (11) has on its shaft an encoder (54) with three functions, namely emission of a counting pulse, emission of a cyclic code per revolution of the printing cylinder and emission of an incremental pulse train, the counting pulse controls an electronic counter (55) whose function is to deliver sequence pulses to preset accounts, the pulses of the cyclic code synchronize the operation of an electronic tracking device (56) with the cycle of the machine which also receives pulses emitted by detectors (57, 58) actuated by cams (59, 61) carried by the cylinders plate holder (9, 10).
EP88403227A 1987-12-18 1988-12-16 Offset printing press operating in tandem Expired - Lifetime EP0321360B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88403227T ATE61285T1 (en) 1987-12-18 1988-12-16 OFFSET PRINTING MACHINE IN TANDEM CONSTRUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717752 1987-12-18
FR8717752A FR2624792B1 (en) 1987-12-18 1987-12-18 OFFSET PRINTING DEVICE OPERATING IN TANDEM

Publications (2)

Publication Number Publication Date
EP0321360A1 true EP0321360A1 (en) 1989-06-21
EP0321360B1 EP0321360B1 (en) 1991-03-06

Family

ID=9358059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88403227A Expired - Lifetime EP0321360B1 (en) 1987-12-18 1988-12-16 Offset printing press operating in tandem

Country Status (7)

Country Link
US (1) US4919046A (en)
EP (1) EP0321360B1 (en)
AT (1) ATE61285T1 (en)
DE (1) DE3861959D1 (en)
ES (1) ES2021455B3 (en)
FR (1) FR2624792B1 (en)
HK (1) HK68094A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464309A2 (en) * 1990-05-28 1992-01-08 WindmÀ¶ller & Hölscher Printing machine
EP0509414A1 (en) * 1991-04-19 1992-10-21 KOENIG &amp; BAUER-ALBERT AKTIENGESELLSCHAFT Printing unit for a rotary printing press
EP0895857A2 (en) * 1997-08-07 1999-02-10 Heidelberger Druckmaschinen Aktiengesellschaft Device and method for changing the printing image during the operation of a printing press
WO2010020284A1 (en) * 2008-08-21 2010-02-25 Wifag Maschinenfabrik Ag Rotation printing machine for rapid production changeover
CN103786420A (en) * 2014-02-21 2014-05-14 中山火炬职业技术学院 Double-printing-plate alternative printing lithography machine with independent water and ink painting system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021895C2 (en) * 1990-07-10 1994-02-17 Roland Man Druckmasch Printing unit of an offset printing machine for performing a flying printing plate change
JP3718275B2 (en) * 1996-01-12 2005-11-24 株式会社小森コーポレーション Printer
US5806427A (en) * 1997-08-29 1998-09-15 Goss Graphic Systems, Inc. Printing press having carriage mounted interchangeable plate cylinders
JP2964238B2 (en) * 1998-03-06 1999-10-18 株式会社東京機械製作所 Offset printing mechanism and offset printing machine having this printing mechanism
DE10111363B4 (en) * 2001-03-06 2005-03-24 Koenig & Bauer Ag printing unit
WO2010056851A1 (en) * 2008-11-13 2010-05-20 Larry Hines Offset printing unit with plate cylinder drive

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US2598414A (en) * 1946-04-19 1952-05-27 Addressograph Multigraph Pivotal frame mounting structure for offset printing machine cylinders
DE3313219A1 (en) * 1983-04-13 1984-10-18 Metronic Gerätebau GmbH & Co, 8702 Veitshöchheim Printing unit for a rotary printing machine
DE8410619U1 (en) * 1984-04-05 1985-06-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Printing unit of a rotary offset printing machine

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US1545194A (en) * 1923-04-06 1925-07-07 Hoe & Co R Printing seal or edition headings and late or stop-press news
US2425167A (en) * 1942-07-02 1947-08-05 Goss Printing Press Co Ltd Printing press
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Publication number Priority date Publication date Assignee Title
US2598414A (en) * 1946-04-19 1952-05-27 Addressograph Multigraph Pivotal frame mounting structure for offset printing machine cylinders
DE3313219A1 (en) * 1983-04-13 1984-10-18 Metronic Gerätebau GmbH & Co, 8702 Veitshöchheim Printing unit for a rotary printing machine
DE8410619U1 (en) * 1984-04-05 1985-06-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Printing unit of a rotary offset printing machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0464309A2 (en) * 1990-05-28 1992-01-08 WindmÀ¶ller & Hölscher Printing machine
EP0464309B1 (en) * 1990-05-28 1997-08-06 WindmÀ¶ller & Hölscher Printing machine
EP0509414A1 (en) * 1991-04-19 1992-10-21 KOENIG &amp; BAUER-ALBERT AKTIENGESELLSCHAFT Printing unit for a rotary printing press
EP0895857A2 (en) * 1997-08-07 1999-02-10 Heidelberger Druckmaschinen Aktiengesellschaft Device and method for changing the printing image during the operation of a printing press
EP0895857A3 (en) * 1997-08-07 1999-06-30 Heidelberger Druckmaschinen Aktiengesellschaft Device and method for changing the printing image during the operation of a printing press
EP1157830A1 (en) * 1997-08-07 2001-11-28 Heidelberger Druckmaschinen Aktiengesellschaft Device and method for changing the printing image during the operation of a printing press
WO2010020284A1 (en) * 2008-08-21 2010-02-25 Wifag Maschinenfabrik Ag Rotation printing machine for rapid production changeover
CN103786420A (en) * 2014-02-21 2014-05-14 中山火炬职业技术学院 Double-printing-plate alternative printing lithography machine with independent water and ink painting system

Also Published As

Publication number Publication date
US4919046A (en) 1990-04-24
ES2021455B3 (en) 1991-11-01
EP0321360B1 (en) 1991-03-06
HK68094A (en) 1994-07-22
FR2624792A1 (en) 1989-06-23
FR2624792B1 (en) 1990-05-18
ATE61285T1 (en) 1991-03-15
DE3861959D1 (en) 1991-04-11

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