EP0123049B1 - Machine à imprimer comportant un cylindre d'impression, en particulier machine sérigraphique - Google Patents

Machine à imprimer comportant un cylindre d'impression, en particulier machine sérigraphique Download PDF

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Publication number
EP0123049B1
EP0123049B1 EP84101851A EP84101851A EP0123049B1 EP 0123049 B1 EP0123049 B1 EP 0123049B1 EP 84101851 A EP84101851 A EP 84101851A EP 84101851 A EP84101851 A EP 84101851A EP 0123049 B1 EP0123049 B1 EP 0123049B1
Authority
EP
European Patent Office
Prior art keywords
roller
web
printing machine
impression cylinder
changing means
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
EP84101851A
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German (de)
English (en)
Other versions
EP0123049A3 (en
EP0123049A2 (fr
Inventor
Gerhard Klemm
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0123049A2 publication Critical patent/EP0123049A2/fr
Publication of EP0123049A3 publication Critical patent/EP0123049A3/de
Application granted granted Critical
Publication of EP0123049B1 publication Critical patent/EP0123049B1/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
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/24—Supports for workpieces for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs

Definitions

  • the invention relates to a screen printing machine working with a counter-pressure roller, according to the preamble of claim 1.
  • DE-A-2 425 693 describes a screen printing machine with side-edge control that works with a counter-pressure roller, the printing machine being designed to operate in discontinuous mode, and the machine having a device for register marking or reading, which is located in front of the counter-pressure roller.
  • This device works on the principle of aligning the continuous fabric web in a printing press in such a way that the fabric web is brought into an obliquely angled position in order to control the lateral movement of the fabric web during printing.
  • a horizontally reciprocating screen frame support is used, which strikes an elastic, movable printing cylinder frame, whereby adjustment of the screen to the printing cylinder is achieved.
  • DE-A 2 314 045 describes a continuously operating machine in which devices for register reading are provided directly in front of the counter-pressure roller between the latter and upstream deflection devices.
  • control vibrations there are no so-called control vibrations in the side edge run and the deflections between the printing units do not serve to eliminate the control vibrations of the side edge run, but are register rollers which compensate for the distance changes in order to obtain a perfect multicolor print. They are intended to compensate for these distances, which are subject to fluctuations due to stretching or shrinking and pinching.
  • these deflection rollers are integrated in a precisely working measuring system and its measuring methods.
  • the present invention is intended for the use of a discontinuously running web of material which is to be doctored discontinuously over a movably arranged flat screen template, the web of material also being transported forward discontinuously.
  • side edge controls are to be provided, each of which is arranged upstream of the printing unit in the direction of travel of the goods. These side edge controls are intended to prevent an increased side profile of the web, in contrast to the aforementioned DE-A 2 425 693 where the side profile is deliberately achieved.
  • side edge controls are selected which respond immediately when the web runs to the right or left from the desired position.
  • frames are used which pivot about a vertical axis in the infeed area of the web and which carry so-called edge sensors in the outfeed area. If the goods run to the right or left, a corresponding signal is given.
  • This side edge control therefore has the task of supplying the web of material to the printing unit in an exactly aligned manner, it being provided in particular for maintaining the side repeat.
  • compliance with the side repeat is extremely important.
  • the registration mark is preferably entered by punching holes or by another marking known per se, as a result of which the longitudinal repeat is determined.
  • the page repeat is generally adhered to by the side edge control in order to prevent the subsequent printing station either from being placed on the same machine when it is being rerun, or from being printed in a different printing station at a different position from the page repeat.
  • the side edge controls have the disadvantage, however, that they cause unrest on the web and in particular influence the adherence to the longitudinal repeat by transporting the web to the right and left, counter to the direction in which they run out, which means that the longitudinal repeat can also change somewhat.
  • the present invention is therefore based on the object to provide a device with which it is possible to eliminate the albeit slight unrest factor by the side edge control in such a way that an absolutely smooth, even, discontinuous feed to the counter-pressure roller is ensured, after the material web has calmed down the longitudinal repeat is precisely determined or read, so that the material web is calmed down and fed precisely to the counter-pressure roller.
  • the inlet is completely calmed down and the web of goods is fed to the impression cylinder by a relatively simple measure, and an increased lateral profile is also prevented at the same time.
  • the device is to be operated discontinuously and thus there are increased control vibrations in the lateral guide, these can be largely eliminated by the deflections.
  • Fig. 1 the device is shown schematically.
  • a screen printing station 2 in the upper area, consisting of a drive-provided, movably guided screen stencil 20 and a squeegee arrangement 21, also provided with conventional movement mechanisms Scrapering of the web 4 which is carried out discontinuously in the present case is possible.
  • the material web comes from a supply (not shown) via an infeed unit 5, consisting of a dancer roller 50 and / or vacuum strip 51, to enable tension to be built up in the material web.
  • Both the dancer roller 50 and the vacuum bar 51 hold back the web, wherein the dancer roller 50 can also be a control element for the pull roller 6, which is arranged as an outlet roller at the opposite end of the machine.
  • This pull roller 6 runs somewhat faster than the other transport devices, so that tension builds up constantly in the web. It can have a higher peripheral speed.
  • a deflection device is arranged downstream of the side edge controls 7, 7 '.
  • This deflection device consists of at least two, but preferably three, rollers 90, 91, 92, the deflection device being arranged in the exemplary embodiments shown in FIGS. 1 and 3 such that a web loop 40 is formed.
  • the deflection rollers which can also be deflection rollers or rods, lie in such a way that the web of material, which is preferably guided vertically in this area, is first deflected horizontally by preferably 90 ° to the left by the deflection roller 90 and then by the deflection roller 91 is preferably returned 180 ° and is deflected by the deflecting roller 92 again by preferably 90 ° into the vertical, so that a U is formed in the barrel.
  • the counter-pressure roller 3 onto which the web 4 is tangentially guided.
  • the area between the deflecting roller 92 and the counter-pressure roller 3 is selected so that a device for register marking or reading 8 'can be arranged directly in front of the counter-pressure roller 3 in the direction of travel of the goods.
  • deflection rollers, rollers or rods can be fixed, rotatably mounted, but can also be driven.
  • the deflecting roller, roller or rod 91 as a voltage regulator and to mount it movably in the arrow directions A.
  • the web guide between an overflow roller 77 leading into the vertical web guide and the counter-pressure roller 3 should lie in alignment, which is an elongated, preferably vertical tangent of the conveyed web 4 to the counter-pressure roller 3.
  • a deflection from this escape line only causes the deflection device 9, which is interposed to calm the web 4.
  • a further device for register marking or reading 8 can be connected upstream of the web guide, which device can be used for preliminary checking.
  • the deflection device is designed such that it consists only of the two rollers 90 and 91, which in turn can also be deflecting rods, the web being guided twice in the Z only.
  • the U-guide is more advantageous, so that there is a web loop.
  • Fig. 4 shows a parallel offset of the web guide.
  • the web guide between the overflow roller 77 and the counter-pressure roller 3 is not in alignment in this example.
  • the web 4 is guided in the vertical direction in the direction of the goods onto the deflecting roller, roll or rod 90.
  • the so-called device for register marking or reading can be arranged in the web guide.
  • the deflection roller 90 deflects the web 4 by preferably 90 ° to the right into the horizontal to the deflection roller 91.
  • the web 4 is preferably returned to the vertical by 90 ° and passed onto the counter-pressure roller 3.
  • the area between the deflection roller 91 and the counter-pressure roller 3 is also selected here such that, as in FIGS.
  • This intermediate space between the deflection device and the counter-pressure roller 3 is again dimensioned relatively short in order to apply or read the registration mark immediately after the web has calmed down by the deflection device and then immediately apply the web to the counter-pressure roller.
  • FIG. 2 and 5 representations of the side edge control are shown.
  • two side edge controls are connected in series, namely the side edge controls 7 and 7 '.
  • FIG. 5 Their design corresponds to the embodiment in Fig. 5. It is a pivotally suspended frame 72.
  • the frame pivot point is designated 73 in the drawing. It is a vertical axis about which the frame can pivot and which is located in the inlet area of the web 4.
  • the side opposite the frame pivot point carries edge sensors 74 which are U-shaped and lie opposite one another and which enclose the web 4 between them. If the web runs to the right or left, a signal is given, whereby an adjustment motor is switched on, which pivots the entire frame.
  • the adjusting motor 75 is fixedly mounted in the device and causes the frame to be pivoted in the direction of the arrow B and the frame pivot point 73, as a result of which the overflow rollers 76, 77 incline, in each case swinging out to the right or left, as shown in FIG. 2 .
  • a foldable pressure roller or wide stretching roller 31 Associated with the counterpressure roller is a foldable pressure roller or wide stretching roller 31, which is preferably carried along by the movement of the web 4.
  • material web such as paper, film, and possibly also transitions to goods containing fiber material.
  • the invention is not limited to the exemplary embodiments shown. It is important that the displacement of the web to align the side repeat results in an accurate feed of the web in the longitudinal repeat to the counter-pressure roller 3 and that a precise distance from the printing area is achieved here. This can be done by the device for register marking or reading 8 in front of the deflection device 9 or by an identical device for register marking or reading in the course of the goods after the deflection device 9, which is denoted by 8 'in the drawing and thus between the deflection device 9 and the counter-pressure roller 3. Placement in the upper area is more advantageous because a more precise distance from the printed image can be achieved by an upper photo cell arranged in this way. This distance plays a particularly important role if the web is already provided with registration marks in the first pass and the registration marks have to be read in the second, third or fourth pass in order to enable a very exact, for example multi-color printing.
  • the arrangement of the deflection device 9 of a compensating roller or the arrangement of a web loop 40 is more advantageous than the simple deflection via two deflection rollers, rollers or rods 90, 91 in each case by approximately 90 °. It is most advantageous to use the deflection roller or roller 91 as a tension control roller or roller, it being electrically connected to the drive of at least one pull roller 6 located in the outlet region of the machine and acting on its speed. It is advantageous if the deflecting rollers or rollers 90, 92 lie directly one above the other, so that the web loop has two identical ends.
  • the deflection device prevents the unrest that emanates from the side edge or rail edge control 7, 7 'from somehow reaching the printing area.
  • the device advantageously works discontinuously. A high register accuracy is achieved with the device:
  • the two devices 8 'and 8 “must be arranged and assigned to the side edges of the web in such a way that one of the devices, for example the device 8' on the right side attaches or reads the register marks, and the one on the other side of the counter-pressure roller 3 Device 8 "for example on the left side of the web is not.
  • the shift in relation to the counter-pressure roller also results from the diagonal arrangement of the register marks of the material that is not rewound.

Landscapes

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

Claims (6)

1. Machine d'impression sérigraphique travaillant avec un cylindre de contre-pression (3) et avec un moyen de commande des bords latéraux (7,7'), la machine d'impression étant conçue pour un fonctionnement en marche discontinue et présentant un dispositif pour l'inscription ou selon le cas la lecture de repères qui se trouve avant le cylindre de contre-pression, caractérisée en ce que:
- le moyen de commande des bords latéraux (7, 7') est réalisé pivotant et est muni de palpeurs de bords latéraux,
- il est prévu, après ce moyen de commande dans le sens, d'avance du tissu, un dispositif de changement de direction (9) pour la bande de tissu, dispositif dans lequel la bande de tissu est guidée selon une boucle de bande de tissu (40) en forme de U, ou selon un guidage de bande de tissu en forme de Z,
- le dispositif pour l'inscription ou selon la cas la lecture de repères (8') est prévu juste avant le cylindre de contre-pression (3) et juste après le dispositif de changement de direction (9), et
- le cylindre de traction (6) dans la région de sortie de la machine est disposé, vu dans le sens d'avance du tissu, après le cylindre de contre-pression (3), est réalisé sous la forme d'un cylindre tournant plus rapidement ou d'un cylindre d'une plus grande vitesse périphérique que le cylindre de contre-pression (3).
2. Machine d'impression selon la revendication 1, caractérisée en ce qu'il est prévu, avant le dispositif de changement de direction (9) et/ou après le cylindre de contre-pression dans le sens d'avance du tissu, un ou deux dispositifs supplémentaires (8', 8") pour l'inscription ou la lecture de repères.
3. Machine d'impression selon la revendication 1, caractérisée en ce que l'ensemble de rouleaux, de cylindres et/ou de tringles du dispositif de changement de direction (9) est conformé de telle sorte qu'il est prévu deux rouleaux ou tringles comme dispositif de déviation (90, 92), et comme cylindre d'équilibrage (91) un cylindre qui, de préférence, est entraîné, qui doit servir simultanè- ment de cylindre de contrôle de tension ou encore de régulateur de tension, et qui est relié électriquement à l'entraînement d'au moins un cylindré de traction (6) disposé dans la région de sortie de la machine.
4. Machine d'impression selon la revendication 1 et l'une des revendications suivantes, caractérisée en ce que deux moyens de commande des bords latéraux (7, 7') sont disposés avant le dispositif de changement de direction (9).
5. Machine d'impression selon la revendication 1 et une ou plusieurs des revendications suivantes, caractérisée en ce que, dans la région du dispositif de changement de direction (9), les guides d'amenée et d'évacuation de la bande de tissu s'étendant verticalement ou approximativement verticalement jusqu'au cylindre de contre-pression (3), et la bande est amenée verticalement ou approximativement verticalement au cylindre de contre-pression (3), et est guidée autour de ce dernier jusqu'à son évacuation vers le cylindre de traction (6).
6. Machine d'impression selon la revendication 1 et une ou plusieurs des revendications suivantes, caractérisée en ce que les parties de guidage verticales ou approximativement verticales du système de guidage de la bande de tissu présentent un prolongement parallèle dans la région du dispositif de changement de direction (9).
EP84101851A 1983-02-23 1984-02-22 Machine à imprimer comportant un cylindre d'impression, en particulier machine sérigraphique Expired - Lifetime EP0123049B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3306241 1983-02-23
DE3306241A DE3306241A1 (de) 1983-02-23 1983-02-23 Mit gegendruckwalze arbeitende druckmaschine, vorzugsweise siebdruckmaschine

Publications (3)

Publication Number Publication Date
EP0123049A2 EP0123049A2 (fr) 1984-10-31
EP0123049A3 EP0123049A3 (en) 1985-12-27
EP0123049B1 true EP0123049B1 (fr) 1990-05-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101851A Expired - Lifetime EP0123049B1 (fr) 1983-02-23 1984-02-22 Machine à imprimer comportant un cylindre d'impression, en particulier machine sérigraphique

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EP (1) EP0123049B1 (fr)
DE (2) DE3306241A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719059C2 (de) * 1987-06-06 1994-02-24 Gerhard Klemm Siebdruckmaschine zum Bedrucken einer Warenbahn

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB573119A (en) * 1942-10-17 1945-11-07 Goss Printing Press Co Ltd Improvements in or relating to web guiding mechanism
US2522479A (en) * 1946-09-27 1950-09-12 Goss Printing Press Co Ltd Registration control device
GB637136A (en) * 1946-11-21 1950-05-10 Goss Printing Press Co Ltd Improvements in registration control devices
GB668205A (en) * 1948-09-25 1952-03-12 Westinghouse Electric Int Co Improvements in or relating to scanning devices for register regulation
AT178341B (de) * 1950-07-25 1954-04-26 Konrad Dr Ing Prett Filmdruckmaschine
DE1053529B (de) * 1957-01-31 1959-03-26 Albert Schnellpressen Papierbahnspannungsregler an Rotationsdruckmaschinen
US3329087A (en) * 1964-11-30 1967-07-04 Huck Regulation of repetitive pattern repeat length on a web
US3525858A (en) * 1967-05-09 1970-08-25 Hurletron Inc Web register control apparatus responsive to web speed and register error
CH516460A (de) * 1969-12-15 1971-12-15 Ciba Geigy Ag Vorrichtung zur Bandlaufsteuerung
IT956921B (it) * 1972-06-28 1973-10-10 Brasa Umberto Sistema per il registro automatico del nastro di carta su cilindro nella stampa serigrafica in parti colare a piu colori
DE2314045A1 (de) * 1973-03-21 1974-10-10 Charles E Gunst Einrichtung an bahnfuehrenden maschinen zur laengenmessung und zum feststellen von laengenaenderungen an der laufenden bahn
DE2329177C2 (de) * 1973-06-07 1982-07-29 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zur registerhaltigen Abstimmung von an einer laufenden Materialbahn im Abstand voneinander angreifenden Walzen oder Walzenpaaren auf auf dieser Bahn vorgesehene Marken
DE2425693A1 (de) * 1974-05-28 1975-12-11 Black James Druckpresse zum bedrucken von stoffbahnen
DE2810690A1 (de) * 1978-03-11 1979-09-20 Kammann Maschf Werner Siebdruckverfahren und vorrichtung zu dessen durchfuehrung
US4201132A (en) * 1978-04-28 1980-05-06 Maschinenfabrik Peter Zimmer Aktiengesellschaft Method of an apparatus for equalizing longitudinal stresses in an advancing web
DE3136175A1 (de) * 1981-09-12 1983-03-31 Gerhard Ing.(grad.) 4800 Bielefeld Klemm "mit gegendruckzylinder arbeitende druckmaschine"

Also Published As

Publication number Publication date
DE3306241A1 (de) 1984-08-23
EP0123049A3 (en) 1985-12-27
EP0123049A2 (fr) 1984-10-31
DE3482251D1 (de) 1990-06-21

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