EP0765746B1 - Machine d'impression et procédé d'alimentation en feuilles sous plusieurs cylindres d'impression - Google Patents

Machine d'impression et procédé d'alimentation en feuilles sous plusieurs cylindres d'impression Download PDF

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Publication number
EP0765746B1
EP0765746B1 EP96115358A EP96115358A EP0765746B1 EP 0765746 B1 EP0765746 B1 EP 0765746B1 EP 96115358 A EP96115358 A EP 96115358A EP 96115358 A EP96115358 A EP 96115358A EP 0765746 B1 EP0765746 B1 EP 0765746B1
Authority
EP
European Patent Office
Prior art keywords
transport band
printing machine
ink transfer
band
conveyor belt
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
EP96115358A
Other languages
German (de)
English (en)
Other versions
EP0765746A1 (fr
Inventor
Martin Greive
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0765746A1 publication Critical patent/EP0765746A1/fr
Application granted granted Critical
Publication of EP0765746B1 publication Critical patent/EP0765746B1/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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines

Definitions

  • the invention relates to a printing machine with an endless Conveyor belt and a method for producing Contact forces during a sheet transport along several Forme cylinder using a conveyor belt.
  • the invention is based, the Adjustment effort for setting several printing units to reduce changing operating conditions.
  • any color transfer device can a forme cylinder of a printing unit or a ribbon that the Color from another point of the printing unit and around a cylinder on which the paint is pressed by the substrates is transferred.
  • the invention is particularly for digital printing machines suitable where the for perfect printing required back pressure and the pulling forces from Forme cylinders much smaller than conventional ones Printing presses are.
  • the bias to generate a such back pressure can be generated simply by the conveyor belt within its elastic range is kept tense.
  • the strength of the contact pressure can be both about the pretensioning of the conveyor belt and about control its modulus of elasticity.
  • impression cylinders or the like are omitted and instead its just a device for generating the bias must be provided, e.g. B. an adjustment device for one of the rollers around which the conveyor belt runs has the Printing machine according to the invention a very simple structure and is therefore inexpensive to manufacture.
  • This printing machine has an endless Conveyor belt 1 on the two spaced Rolls 2 and 3 rotates and not on its upper run shown sheets conveyed similarly to that mentioned above Color copier.
  • On the upper run of the conveyor belt 1 between the rollers 2 and 3 are four printing units in the same Distances arranged one behind the other, of which only the Forme cylinder 4 are shown.
  • Below the upper run of the conveyor belt 1 are four impression cylinders 5 stored, each impression cylinder 5 a Forme cylinder 4 is opposite.
  • the conveyor belt 1 runs in a straight line between the Forme cylinders 4 and impression cylinders 5 through, wherein between one forme cylinder 4 and one Back pressure cylinder 5 a contact force Fn perpendicular to Surface of the forme cylinder 4 acts through which on the Conveyor belt 1 conveyed sheets against the forme cylinder 4 to be pressed one by one from the inks Transfer form cylinders 4 to the arches.
  • the Forme cylinder 4 and / or the impression cylinder 5 are for Setting to different paper thicknesses individually in the Adjustable height.
  • the printing machine shown in Fig. 1 differs from 5 in that it does not Has impression cylinder. Instead, it is provided that the forme cylinder 4 are arranged so that the Conveyor belt 1 adjacent places on the circumference of the Forme cylinder 4 more or less far below a level are located, which is a straight course of the upper run of the Conveyor belt 1 would correspond. In other words the forme cylinder 4 arranged so that the upper run of the The conveyor belt 1 as a whole is approximately parabolic bends towards the lower run. Between each However, the conveyor belt 1 runs through two forme cylinders 4 rectilinear, the planes of each of the forme cylinders 4 arriving part and the moving part of the Cut conveyor belt 1 at a small angle. In this state, the conveyor belt 1 is under one Preload Fv.
  • Each forme cylinder 4 is over a small part of its Wrapped around the circumference of the conveyor belt 1, the Wrap angle is equal to the angle at which to each forme cylinder 4 the levels of the incoming part and cut away part of the conveyor belt 1.
  • a contact pressure Fn exerted by the biasing force Fv of the conveyor belt 1 depends, as in the figure by four Force parallelograms above the associated forme cylinders 4 shown. Due to the parabolic arrangement of the equally spaced forme cylinders 4 are the four Contact forces Fn1 to Fn4 are of the same magnitude.
  • One of the rollers 2, 3 is by means of a not shown Adjustment device towards and away from the other adjustable.
  • the adjustment device changes the biasing force Fv of the conveyor belt 1, so that on this way the contact forces Fn1 to Fn4 are increased together or can be reduced.
  • This allows the Contact forces Fn1 to Fn4 on all printing units simultaneously be changed or adapted if this is in the operation of the Printing press is required.
  • the Printing machine very quickly and easily to a new one Paper thickness or paper quality can be set without any settings on the individual printing units to have to make, as with conventional printing presses.
  • a tensile conveyor belt 1 with a high Young's modulus e.g. B. a conveyor belt 1 made of steel or with steel inserts, can already be used with very small ones Adjustment paths of the rollers 2, 3 a large adjustment range be covered so that the effective length of the Conveyor belt 1 only when adjusting the pretension changes slightly.
  • the pretension can only be achieved by Internal tension of the conveyor belt 1 when held Rollers 2, 3 are applied, but if necessary, z. B. an elastic suspension of one of the rollers 2, 3 is provided become.
  • the invention is not based on one more or less straight line arrangement of the forme cylinders limited.
  • z. B four Forme cylinder 6 along an arc at intervals be arranged one behind the other, the circular arc in case shown is slightly more than 180 °.
  • each a deflection roller 7, 8 arranged such that a the deflecting rollers 7, 8 guided endless Conveyor belt 9 all four forme cylinders 6 partially wraps around.
  • the returning run of the conveyor belt 9 is by two further deflecting rollers 10, 11 at a distance around the entire arrangement led around.
  • One of the deflection rollers 7, 8, 10, 11, here the deflection roller 10, is adjustable to adjust the belt tension, as by a double arrow P is displayed.
  • the Band tension can be used as in previous ones Embodiments of the contact forces between the forme cylinders 6 and the conveyor belt 9 are changed together.
  • FIG Forme cylinder 6 enables a relatively compact Construction and is also for machine constructions from Interest that have one or more elements by all printing units are used together and within a dashed circle 12 may be arranged can.
  • the Positions of the forme cylinder 6 are unchangeable; otherwise can also in the embodiment of Fig. 4, the forme cylinder 6 individually in the direction of Conveyor belt 9 and be adjustable away from it to be able to adjust the respective contact forces.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (9)

  1. Procédé destiné à engendrer des forces de pression de contact entre des substrats à imprimer, qui sont transportés sur une bande de transport sans fin, et plusieurs dispositifs de transfert d'encre qui sont disposés les uns à la suite des autres en étant espacés mutuellement le long de la bande de transport et qui présentent chacun une surface courbe de forme cylindrique en regard de la bande de transport,
    caractérisé en ce que les forces de pression de contact (Fn1 - Fn4) sont engendrées par une tension initiale (Fv) de la bande de transport (1; 9) et par un enroulement partiel des substrats autour des surfaces courbes des dispositifs de transfert d'encre (4; 6) par la bande de transport.
  2. Procédé selon la revendication 1, caractérisé en ce que les forces de pression de contact (Fn1 - Fn4) sont réglées en commun, en réglant la tension initiale (Fv) de la bande de transport (1; 9).
  3. Procédé selon la revendication 1, caractérisé en ce que la force de pression de contact (Fn) est réglée au niveau d'un seul dispositif de transfert d'encre (4; 6), en déplaçant le dispositif de transfert d'encre en direction de la bande de transport (1; 9) et en l'éloignant de celle-ci.
  4. Machine à imprimer comprenant une bande de transport sans fin pour des substrats à imprimer, ainsi que plusieurs dispositifs de transfert d'encre qui sont disposés les uns à la suite des autres en étant espacés mutuellement le long de la bande de transport et qui présentent chacun une surface courbe de forme cylindrique en regard de la bande de transport, caractérisée en ce que durant le fonctionnement de la machine à imprimer, la bande de transport (1; 9) se trouve sous une tension initiale (Fv) et les dispositifs de transfert d'encre (4; 6) sont disposés de façon telle qu'au niveau de chaque dispositif de transfert d'encre le plan de la bande de transport, qui arrive, et le plan de la bande de transport, qui s'éloigne, se coupent en formant entre-eux un angle, la bande de transport (1; 9) s'enroulant autour des substrats au niveau des surfaces courbes des dispositifs de transfert d'encre (4; 6).
  5. Machine à imprimer selon la revendication 4, caractérisée en ce que chaque dispositif de transfert d'encre est un cylindre porte-clichés ou cylindre d'impression (4; 6), ou bien une bande en révolution autour d'un cylindre correspondant, d'un groupe d'impression.
  6. Machine à imprimer selon la revendication 4 ou la revendication 5, caractérisée en ce que la bande de transport (1; 9) est en révolution autour de plusieurs cylindres (2, 3; 7, 8, 10, 11) dont l'un au moins peut être déplacé pour régler la tension de la bande.
  7. Machine à imprimer selon la revendication 6, caractérisée en ce que la bande de transport (1) est en révolution autour de deux cylindres (2, 3) montés à distance l'un de l'autre, et en ce que la tension initiale et l'élasticité de la bande de transport sont choisies de façon telle, que les forces de pression de contact (Fn1 - Fn4) puissent être réglées dans une plage souhaitée, sans que les deux brins de la bande de transport se touchent.
  8. Machine à imprimer selon l'une des revendications 4 à 7, caractérisée en ce que chaque dispositif de transfert d'encre (4; 6) peut être déplacé individuellement en direction de la bande de transport (1; 9) ou en s'éloignant de celle-ci, en vue de régler la force de pression de contact (Fn1 - Fn4) respective.
  9. Machine à imprimer selon l'une des revendications 4 à 8, caractérisée en ce que c'est une machine à imprimer numérique.
EP96115358A 1995-09-29 1996-09-25 Machine d'impression et procédé d'alimentation en feuilles sous plusieurs cylindres d'impression Expired - Lifetime EP0765746B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19536359A DE19536359A1 (de) 1995-09-29 1995-09-29 Druckmaschine und Verfahren zum Bogentransport entlang mehrerer Formzylinder
DE19536359 1995-09-29

Publications (2)

Publication Number Publication Date
EP0765746A1 EP0765746A1 (fr) 1997-04-02
EP0765746B1 true EP0765746B1 (fr) 1999-04-07

Family

ID=7773607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115358A Expired - Lifetime EP0765746B1 (fr) 1995-09-29 1996-09-25 Machine d'impression et procédé d'alimentation en feuilles sous plusieurs cylindres d'impression

Country Status (5)

Country Link
US (1) US5738010A (fr)
EP (1) EP0765746B1 (fr)
JP (1) JPH09123415A (fr)
AU (1) AU701120B2 (fr)
DE (2) DE19536359A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0999319B1 (fr) 1998-11-06 2005-01-26 Harol International N.V. Dispositif de fixation et de verrouillage destine a un store extérieur ou une banne de protection solaire
DE10023151A1 (de) * 2000-05-12 2001-11-15 Nexpress Solutions Llc Einrichtung zur Umlenkung von Riemen zum Transport flächigen Materials
CN113263826A (zh) * 2021-04-28 2021-08-17 黄涛 一种紫光固化柔版印刷机

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1338165A (en) * 1918-04-13 1920-04-27 Enameled Steel Sign Company Printing-machine
DE587513C (de) * 1933-01-13 1933-11-04 Georg Boettinger Gummiwalzendruckmaschine zum ein- und mehrfarbigen Bedrucken verschieden dicker Bogen
DE1099560B (de) * 1958-03-11 1961-02-16 Wilhelm Ritzerfeld Gegendruckelement fuer Rotationsvervielfaeltiger in Form eines rotierenden, den Druckzylinder teilweise umschliessenden Druckbandes
CH433174A (de) * 1965-07-02 1967-04-15 Buser Ag Maschf Fritz Kontinuierlich arbeitende Vorrichtung zum Aufkleben eines zu bearbeitenden, insbesondere zu bedruckenden flächigen Gutes auf ein thermoplastbeschichtetes Transportband
GB1154756A (en) * 1967-05-02 1969-06-11 Bowater Packaging Ltd A Printing Machine for Printing Articles Supplied by an Endless Conveyor Belt
US3934505A (en) * 1973-12-10 1976-01-27 Bernard Screen Printing Corporation Method and apparatus for synchronous printing of a moving web
US4116127A (en) * 1975-11-17 1978-09-26 Brandt-Pra, Inc. Ticket counter and endorser
JPS5827109B2 (ja) * 1977-12-21 1983-06-07 王子製袋株式会社 内容物充填後の袋の表面に印刷する方法及び装置
US4620807A (en) * 1985-09-23 1986-11-04 Xerox Corporation Article transport for printers
DD264190A1 (de) * 1987-09-04 1989-01-25 Polygraph Leipzig Schaufelradausleger zur schuppenauslage von druckprodukten
DE19527264A1 (de) * 1995-07-26 1997-01-30 Heidelberger Druckmasch Ag Druckmaschine mit geradliniger Substratführung und Wendeeinrichtungen dafür

Also Published As

Publication number Publication date
DE59601597D1 (de) 1999-05-12
DE19536359A1 (de) 1997-04-10
US5738010A (en) 1998-04-14
AU701120B2 (en) 1999-01-21
JPH09123415A (ja) 1997-05-13
EP0765746A1 (fr) 1997-04-02
AU6790496A (en) 1997-04-10

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