EP0018291A1 - Variable format printing machine - Google Patents

Variable format printing machine Download PDF

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Publication number
EP0018291A1
EP0018291A1 EP80400528A EP80400528A EP0018291A1 EP 0018291 A1 EP0018291 A1 EP 0018291A1 EP 80400528 A EP80400528 A EP 80400528A EP 80400528 A EP80400528 A EP 80400528A EP 0018291 A1 EP0018291 A1 EP 0018291A1
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EP
European Patent Office
Prior art keywords
speed
printing
web
call
cycle
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
EP80400528A
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German (de)
French (fr)
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EP0018291B1 (en
Inventor
Eric Tison
Paul Herve
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ETS DESTOUCHE
CODIMAG
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ETS DESTOUCHE
CODIMAG
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Priority to AT80400528T priority Critical patent/ATE3763T1/en
Publication of EP0018291A1 publication Critical patent/EP0018291A1/en
Application granted granted Critical
Publication of EP0018291B1 publication Critical patent/EP0018291B1/en
Expired legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/02Conveying or guiding webs through presses or machines
    • B41F13/04Conveying or guiding webs through presses or machines intermittently

Definitions

  • the invention relates to a method for controlling the printing format of a web supplying a voltage-free printing machine with a rotary printing cylinder, this machine operating in successive cycles, each cycle being defined by a rotation of the printing cylinder. and having a printing range from the nap- pe in said format.
  • the object of the invention is to allow an easy change of the format, that is to say of the length of the web which passes at each cycle.
  • the web is advanced during each cycle, alternately at the printing speed during printing and at a call speed at most equal to the printing speed, absorbing by a recall of the tablecloth to the rear the excess length provided by the printing speed on the calling speed if the latter is lower than the printing speed, without stopping the tablecloth between scrolling at the speed of call and scroll at print speed.
  • the invention applies to all printing processes (letterpress, dry offset, wet offset, heliographic) and it allows the use of paper in sheets of a wide variety of grammages and quality.
  • the invention also relates to devices for implementing the method of the invention.
  • the device shown in Figures 1 to 6 comprises a printing machine 1 shown schematically by a printing cylinder 2 having a printing surface 3 which is assumed for example to cover three quarters of the surface of the cylinder and by a back-pressure cylinder 17.
  • the printing cylinder acts on the web 4 when there is contact between this web and the printing surface, due to the pinching of the web between the printing surface 3 and a counterpart surface 18 of the cylinder. 17.
  • the device shown comprises, downstream of the printing machine, in the direction of travel of the web shown by arrow 5, a device 6 for pulling the web in the direction of arrow 5 at a speed equal to the speed d printing and a device 7 for pulling the sheet in the direction of the arrow 5 at a calling speed.
  • the device also includes, upstream of the machine 1, a return device 8 for returning the sheet in the opposite direction to the normal direction of travel 5.
  • the device 6 is designed to drive the web in synchronism with the printing, that is to say that the start and the end of this training coincide with the beginning and the end of the printing and that the driving speed coincides with the tangential speed of the printing cylinder, a speed which has been called "printing speed”.
  • the device 6 is constituted for example by a cam whose surface has the same shape and the same angular extent as the printing surface, this cam being driven in rotation at the same speed as the printing cylinder, the angular positions of this cam and the printing surface being identical to obtain the desired coincidences of the contacts with the web.
  • this cam is shown diagrammatically by a sector 9 of a circle.
  • the device 7 is designed to drive the web at a chosen speed, called the "calling speed" which is at most equal to the printing speed.
  • This device comprises, in a preferred embodiment, a crown 10 provided with pins 11 able to mesh in perforations staggered along the ply (for example so-called “Caroll” perforations) this crown being mounted idle coaxially with a rotor 12 which rotates in permanence at speed. to appeal and which is provided with a stop 13 suitable for coming into contact with a stop 14 of the ring to cause the latter to the take-up speed.
  • cam 9 and the pin crown 10 are located opposite as shown, but in alternative embodiments, they are offset, the cam being downstream of the crown.
  • the device 8 is designed to permanently exert a certain tension on the sheet and to recall the sheet 4 backwards after each printing, when necessary, i.e. if the printing speed is higher than the calling speed.
  • This device 8 comprises a rotor 16 with peripheral balls 19 and a rotor 20 with cam 21 cooperating.
  • the ply is normally tensioned by friction between the balls 19 and the surface of the rotor 20 but when the cam 21 which is projecting passes in contact with the ply, the friction becomes sufficient to exert a backward return on the ply.
  • the cam 21 is synchronized with the printing surface so that the start of the return contact of the web by this cam coincides with the end of the print contact of the printing surface 2 with the web.
  • FIG. 2 shows the start of the cycle.
  • the tablecloth is free except that it is engaged with the pin ring 10 whose stop 14 is driven by the stop 13 of the rotor 12 at the call speed: the tablecloth therefore advances at this speed in the direction of arrow 5, the return by cam 21 having ended.
  • the next phase is a printing phase during which the printing surface is in printing contact with the web and during which the web is pulled forward by the cam 9.
  • This pulling takes place at a speed greater than the speed of the call, it is no longer the sprocket crown which can cause the tablecloth, but on the contrary it is the tablecloth which imposes its speed which is then the printing speed on the spike crown, the stop 14 of which advances in relation to the stop 13 of the rotor 12 which rotates at the call speed lower than the print speed:
  • FIG. 4 diagrams this phase and it can be seen that there is an angular difference between the stops 13 and 14.
  • the rotor 12 can again drive the web at the call speed through the pivot crown, until the printing surface is in contact with the web while the second cycle has already started.
  • Figure 1 the diagram of the control of the various rotary members from a common power take-off.
  • a gear (not shown) between the cylinders 2 and 17 so that they rotate in opposite directions.
  • the printing cylinder is a driving cylinder which rotates in the direction of arrow 22
  • drive connections are made between this cylinder and the rotors 9 and 20 so that the cams 9 and 21 rotate like the engine cylinder.
  • the counterpressure cylinder 17 rotates in the opposite direction 23 and a drive link is established comprising a pinion 21 between the cylinder 17 and the rotor 12 so that the rotor rotates in the same direction as the cylinder 17 but with a speed which depends on the choice of pinion.
  • the drive links are shown diagrammatically by broken lines.
  • the variation of the paper format is obtained by changing a control pinion controlling the call of the paper, in this case the tractor with pins 10.
  • FIG. 6 represents a case of reduction of the format.
  • the contact time in the cycle will be reduced to approach the print format (this one this may also be different from the size of the print),
  • Example: the height of the print can be equal to or less than the height of the format 1, 2, 3, 4, 5, 6, .... inches for a 10 inch paper size.
  • the adjustment of the counterpart with respect to the upper part limits the loop of the paper downstream and thereby reduces the length of paper to be caught up during free time. In addition, it increases the free time per cycle, which compensates for the growth in speed differences minus ⁇ plus, plus ⁇ minus, when the format decreases leaving a longer catch-up time.
  • the opening in the cylinders 2 and 17 is calculated so that their respective adjustment can pass from the maximum contact surface to a minimum contact surface of half the maximum contact.
  • the format variation corresponds to the choice of the gearbox module which controls the advance of the paper. If a tooth of the format pinion corresponds to 1/6 of an inch, the variation of format may take place every 1/6 of an inch.
  • the adjustments make it possible to reduce or increase the contact surface of the web and therefore make it possible to maintain a practically constant backward flow of the paper web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Labeling Devices (AREA)
  • Record Information Processing For Printing (AREA)

Abstract

On fait avancer la nappe pendant chaque cycle, alternativement à la vitesse d'impression pendant l'impression et à une vitesse d'appel au plus égale à la vitesse d'impression, en résorbant par un rappel de la nappe vers l'arrière l'excès de longueur procuré par la vitesse d'impression sur la vitesse d'appel si cette dernière est inférieure à la vitesse d'impresion, sans arrêter la nappe. Un dispositif typique comprend en aval du cylindre d'impression (2), un premier organe rotatif sans fin pour l'entraînement de la nappe à la vitesse d'impression (9) et un deuxième organe rotatif sans fin (12) pour l'entraînement de la nappe à la vitesse d'appel. Application aux papiers en nappes d'une grande diversité de grammages et de qualité.The tablecloth is advanced during each cycle, alternately at the printing speed during printing and at a call speed at most equal to the printing speed, absorbing by a recall of the tablecloth backwards l excess length provided by the printing speed on the calling speed if the latter is less than the printing speed, without stopping the web. A typical device comprises, downstream of the printing cylinder (2), a first endless rotary member for driving the web at the printing speed (9) and a second endless rotary member (12) for the water table driving at call speed. Application to tablecloths of a wide variety of grammages and quality.

Description

L'invention concerne un procédé pour commander le format à imprimer d'une nappe alimentant sans tension une machine d'impression à cylindre d'impression rotatif, cette machine fonctionnant par cycles successifs, chaque cycle étant défini par une rotation du cylindre d'impression et comportant une impression d'une plage de la nap- pe dans ledit format.The invention relates to a method for controlling the printing format of a web supplying a voltage-free printing machine with a rotary printing cylinder, this machine operating in successive cycles, each cycle being defined by a rotation of the printing cylinder. and having a printing range from the nap- pe in said format.

Le but de l'invention est de permettre un changement facile du format, c'est-à-dire de la longueur de la nappe qui défile à chaque cycle.The object of the invention is to allow an easy change of the format, that is to say of the length of the web which passes at each cycle.

On y parvient, selon l'invention, en déterminant ce format par une vitesse d'appel de la nappe pendant le cycle.This is achieved, according to the invention, by determining this format by a speed of call of the web during the cycle.

Dans une réalisation typique de l'invention, on fait avancer la nappe pendant chaque cycle, alternativement à la vitesse d'impression pendant l'impression et à une vitesse d'appel au plus égale à la vitesse d'impression, en résorbant par un rappel de la nappe vers l'arrière l'excès de longueur procuré par la vitesse d'impression sur la vitesse d'appel si cette dernière est inférieure à la vitesse d'impression, sans arrêter la nappe entre le défilement à la vitesse d'appel et le défilement à vitesse d'impression.In a typical embodiment of the invention, the web is advanced during each cycle, alternately at the printing speed during printing and at a call speed at most equal to the printing speed, absorbing by a recall of the tablecloth to the rear the excess length provided by the printing speed on the calling speed if the latter is lower than the printing speed, without stopping the tablecloth between scrolling at the speed of call and scroll at print speed.

On évite ainsi, selon l'invention, des mouvements successifs de marche et d'arrêt.According to the invention, successive movements of on and off are thus avoided.

L'invention s'applique à tous les procédés d'impression (typographique, offset sec, offset humide, héliographique) et elle permet l'utilisation de papier en nappes d'une grande diversité de grammages et de qualité.The invention applies to all printing processes (letterpress, dry offset, wet offset, heliographic) and it allows the use of paper in sheets of a wide variety of grammages and quality.

L'invention concerne également des dispositifs pour la mise en oeuvre du procédé de l'invention.The invention also relates to devices for implementing the method of the invention.

On décrira ces dispositifs en référence aux figures du dessin joint sur lequel les figures 1 à 6 représentent différentes phases d'un cycle d'impression.These devices will be described with reference to the figures of the attached drawing in which Figures 1 to 6 represent different phases of a printing cycle.

Le dispositif représenté sur les figures 1 à 6 comprend une machine d'impression 1 schématisée par un cylindre d'impression 2 comportant une surface d'impression 3 dont on suppose pour l'exemple qu'elle couvre les trois quarts de la surface du cylindre et par un cylindre de contre-pression 17. Pour la clarté du dessin, on n'a pas représenté les autres accessoires du dispositif d'impression. Le cylindre d'impression agit sur la nappe 4 lorsqu'il y a contact entre cette nappe et la surface d'impression, du fait du pincement de la nappe entre la surface d'impression 3 et une surface de contre-partie 18 du cylindre 17.The device shown in Figures 1 to 6 comprises a printing machine 1 shown schematically by a printing cylinder 2 having a printing surface 3 which is assumed for example to cover three quarters of the surface of the cylinder and by a back-pressure cylinder 17. For the sake of clarity, the other accessories of the printing device have not been shown. The printing cylinder acts on the web 4 when there is contact between this web and the printing surface, due to the pinching of the web between the printing surface 3 and a counterpart surface 18 of the cylinder. 17.

Le dispositif représenté comprend, en aval de la machine d'impression, dans le sens du défilement de la nappe représenté par la flèche 5, un dispositif 6 pour tirer la nappe dans le sens de la flèche 5 à une vitesse égale à la vitesse d'impression et un dispositif 7 pour tirer la nappe dans le sens de la flèche 5 à une vitesse d'appel.The device shown comprises, downstream of the printing machine, in the direction of travel of the web shown by arrow 5, a device 6 for pulling the web in the direction of arrow 5 at a speed equal to the speed d printing and a device 7 for pulling the sheet in the direction of the arrow 5 at a calling speed.

Le dispositif comprend également, en amont de la machine 1, un dispositif de rappel 8 pour rappeler la nappe dans le sens inverse du sens normal du défilement 5.The device also includes, upstream of the machine 1, a return device 8 for returning the sheet in the opposite direction to the normal direction of travel 5.

Le dispositif 6 est conçu pour entraîner la nappe en synchronisme avec l'impression, c'est-à-dire que le début et la fin de cet entraînement coïncident avec le début et la fin de l'impression et que la vitesse d'entraînement coïncide avec la vitesse tangentielle du cylindre d'impression, vitesse que l'on a appelé "vitesse d'impression".The device 6 is designed to drive the web in synchronism with the printing, that is to say that the start and the end of this training coincide with the beginning and the end of the printing and that the driving speed coincides with the tangential speed of the printing cylinder, a speed which has been called "printing speed".

Le dispositif 6 est constitué par exemple par une came dont la surface a la même forme et la même étendue angulaire que la surface d'impression, cette came étant entraînée en rotation à la même vitesse que le cylindre d'impression, les positions angulaires de cette came et de la surface d'impression étant identiques pour obtenir les coïncidences désirées des contacts avec la nappe. Sur les figures, cette came est schématisée par un secteur 9 d'un cercle.The device 6 is constituted for example by a cam whose surface has the same shape and the same angular extent as the printing surface, this cam being driven in rotation at the same speed as the printing cylinder, the angular positions of this cam and the printing surface being identical to obtain the desired coincidences of the contacts with the web. In the figures, this cam is shown diagrammatically by a sector 9 of a circle.

Le dispositif 7 est conçu pour entraîner la nappe à une vitesse choisie, dite "vitesse d'appel" qui est au plus égale à la vitesse d'impression. Ce dispositif comprend, dans une réalisation préférée, une couronne 10 pourvue de picots 11 aptes à engrèner dans des perforations échelonnées le long de la nappe 'par exemple perforations dites "Caroll") cette couronne étant montée folle coaxialement à un rotor 12 qui tourne en permanence à la v itesse.d 'appél et qui est muni d'une butée 13 apte à venir en contact avec une butée 14 de la couronne afin d'entraîner cette dernière à la vitesse d'appel.The device 7 is designed to drive the web at a chosen speed, called the "calling speed" which is at most equal to the printing speed. This device comprises, in a preferred embodiment, a crown 10 provided with pins 11 able to mesh in perforations staggered along the ply (for example so-called "Caroll" perforations) this crown being mounted idle coaxially with a rotor 12 which rotates in permanence at speed. to appeal and which is provided with a stop 13 suitable for coming into contact with a stop 14 of the ring to cause the latter to the take-up speed.

De préférence la came 9 et la couronne à picots 10 sont situées en vis-à-vis comme représentées, mais dans des variantes de réalisation, elles sont décalées, la came étant en aval de la couronne.Preferably the cam 9 and the pin crown 10 are located opposite as shown, but in alternative embodiments, they are offset, the cam being downstream of the crown.

Le dispositif 8 est conçu pour exercer en permanence une certaine tension sur la nappe et pour rappeler vers l'arrière la nappe 4 après chaque impression, lorsque cela est nécessaire, c'est-à-dire si la vitesse d'impression est supérieure à la vitesse d'appel. Ce dispositif 8 comprend un rotor 16 à billes périphériques 19 et un rotor 20 à came 21 coopérant. La nappe est normalement tendue par friction entre les billes 19 et la surface du rotor 20 mais lorsque la came 21 qui est en saillie passe au contact de la nappe, la friction devient suffisante pour exercer sur la nappe un rappel vers l'arrière. La came 21 est synchronisée avec la surface d'impression pour que le début du contact de rappel de la nappe par cette came coïncide avec la fin du contact d'impression de la surface d'impression 2 avec la nappe.The device 8 is designed to permanently exert a certain tension on the sheet and to recall the sheet 4 backwards after each printing, when necessary, i.e. if the printing speed is higher than the calling speed. This device 8 comprises a rotor 16 with peripheral balls 19 and a rotor 20 with cam 21 cooperating. The ply is normally tensioned by friction between the balls 19 and the surface of the rotor 20 but when the cam 21 which is projecting passes in contact with the ply, the friction becomes sufficient to exert a backward return on the ply. The cam 21 is synchronized with the printing surface so that the start of the return contact of the web by this cam coincides with the end of the print contact of the printing surface 2 with the web.

On décrira maintenant un cycle d'impression, en supposant que le cycle commence un peu avant le début d'une impression et se termine un peu après la fin d'une impression.We will now describe a printing cycle, assuming that the cycle begins a little before the start of a print and ends a little after the end of a print.

La figure 2 représente le début du cycle. La nappe est libre si ce n'est qu'elle est en prise avec la couronne à picots 10 dont la butée 14 est entraînée par la butée 13 du rotor 12 à la vitesse d'appel : la nappe avance donc à cette vitesse dans le sens de la flèche 5, le rappel par la came 21 ayant pris fin.Figure 2 shows the start of the cycle. The tablecloth is free except that it is engaged with the pin ring 10 whose stop 14 is driven by the stop 13 of the rotor 12 at the call speed: the tablecloth therefore advances at this speed in the direction of arrow 5, the return by cam 21 having ended.

On suppose maintenant que la surface d'impression vient en contact d'impression avec la nappe (figure 3). A ce moment, la came d'entraînement du dispositif 6 vient également en contact d'entraînement avec la nappe.We now assume that the printing surface comes into printing contact with the web (Figure 3). At this time, the drive cam of the device 6 also comes into drive contact with the ply.

La phase suivante est une phase d'impression pendant laquelle la surface d'impression est en contact d'impression avec la nappe et pendant laquelle la nappe est tirée vers l'avant pas la came 9. Cette traction se faisant à une vitesse supérieure à la vitesse d'appel, ce n'est plus la couronne à picots qui peut entraîner la nappe mais c'est au contraire la nappe qui impose sa vitesse qui est alors la vitesse d'impression à la couronne à picots dont la butée 14 prend de l'avance par rapport à la butée 13 du rotor 12 qui tourne à la vitesse d'appel inférieure à la vitesse d'impression: la figure 4 schématise cette phase et l'on y voit qu'il existe un écart angulaire entre les butées 13 et 14.The next phase is a printing phase during which the printing surface is in printing contact with the web and during which the web is pulled forward by the cam 9. This pulling takes place at a speed greater than the speed of the call, it is no longer the sprocket crown which can cause the tablecloth, but on the contrary it is the tablecloth which imposes its speed which is then the printing speed on the spike crown, the stop 14 of which advances in relation to the stop 13 of the rotor 12 which rotates at the call speed lower than the print speed: FIG. 4 diagrams this phase and it can be seen that there is an angular difference between the stops 13 and 14.

On suppose maintenant que l'on se trouve à la fin de la phase d'impression (figure 5) alors que vont cesser d'une part le contact d'impression de la surrace 2 et de la nappe 4 et d'autre part, le contact d'entraînement de la came 9 et de la nappe 4, la nappe se trouvant ainsi libérée, tandis que simultanément va commencer le contact de rappel de la came 21 et de la nappe.We now assume that we are at the end of the printing phase (FIG. 5) while the printing contact of the surface 2 and of the web 4 will cease on the one hand, and on the other hand, the contact for driving the cam 9 and the ply 4, the ply thus being released, while simultaneously the contact for returning the cam 21 and the ply will begin.

Sous l'effet du rappel de la came 21, la nappe revient en arrière et entraîne dans son mouvement la couronne à picots dont la butée revient également en arrière en se rapprochant de la butée 13 du rotor qui a continué de tourner dans le sens de la vitesse d'appel (figure 1).Under the effect of the return of the cam 21, the ply returns back and drives in its movement the spike crown whose stopper also returns back while approaching the stopper 13 of the rotor which has continued to rotate in the direction of the call speed (Figure 1).

Lorsque ce contact est réalisé, le rotor 12 peut à nouveau entraîner la nappe à la vitesse d'appel par l'intermédiaire de la couronne à pivots, jusqu'à ce que la surface d'impression se retrouve en contact avec la nappe alors que le deuxième cycle a déjà commencé.When this contact is made, the rotor 12 can again drive the web at the call speed through the pivot crown, until the printing surface is in contact with the web while the second cycle has already started.

On a représenté sur la figure 1, le schéma de la commande des différents organes rotatifs à partir d'une prise de mouvement commune. Il existe un engrenage (non représenté) entre les cylindres 2 et 17 en sorte qu'ils tournent en sens inverse. Si l'on suppose que le cylindre d'impression est un cylindre menant qui tourne dans le sens de la flèche 22, on réalise des liaisons d'entraînement entre ce cylindre et les rotors 9 et 20 pour que les cames 9 et 21 tournent comme le cylindre moteur. Le cylindre de contrepression 17 tourne en sens inverse 23 et l'on établit une liaison d'entraînement comprenant un pignon 21 entre le cylindre 17 et le rotor 12 pour que le rotor tourne dans le même sens que le cylindre 17 mais avec une vitesse qui dépend du choix du pignon. Sur la figure, les liaisons d'entraînement sont schématisés par des lignes de traits interrompus.There is shown in Figure 1, the diagram of the control of the various rotary members from a common power take-off. There is a gear (not shown) between the cylinders 2 and 17 so that they rotate in opposite directions. If it is assumed that the printing cylinder is a driving cylinder which rotates in the direction of arrow 22, drive connections are made between this cylinder and the rotors 9 and 20 so that the cams 9 and 21 rotate like the engine cylinder. The counterpressure cylinder 17 rotates in the opposite direction 23 and a drive link is established comprising a pinion 21 between the cylinder 17 and the rotor 12 so that the rotor rotates in the same direction as the cylinder 17 but with a speed which depends on the choice of pinion. In the figure, the drive links are shown diagrammatically by broken lines.

ExempleExample

  • - Le tracteur à picots 10 entraîne le papier à vitesse continue constante. Le format considéré pour un cycle sera par exemple de 12 pouces.- The tractor with pins 10 drives the paper at a constant continuous speed. The format considered for a cycle will be for example 12 inches.
  • - La came 9 et le cylindre d'impression 2 tournent à vitesse continue et constante. Un tour de cylindre correspond à un cycle. Les cylindres 2 et 17 ont un évidement de 6 pouces 1/2. Lorsque ces cylindres sont en contact maximum, cette surface est équivalente à 12 pouces 1/2, ce qui donne une vitesse totale de 19 pouces par cycle.- The cam 9 and the printing cylinder 2 rotate at a constant and constant speed. One revolution of the cylinder corresponds to one cycle. Cylinders 2 and 17 have a 6 1/2 inch recess. When these cylinders are in maximum contact, this surface is equivalent to 12 1/2 inches, which gives a total speed of 19 inches per cycle.

La variation du format de papier s'obtient en changeant un pignon de commande commandant l'appel du papier, en l'occurence le tracteur à picots 10.The variation of the paper format is obtained by changing a control pinion controlling the call of the paper, in this case the tractor with pins 10.

Exemple : le changement de pignon fera débiter 10 pouces par cycle au lieu de 12 comme expliqué initialement.Example: the change of pinion will charge 10 inches per cycle instead of 12 as explained initially.

Le développement des cylindres 9 et 2 restera à 19 pouces par cycle. L'écart de vitesse se trouve agrandi de 2 pouces.The development of cylinders 9 and 2 will remain at 19 inches per cycle. The speed difference is increased by 2 inches.

Pour éviter de débiter trop de papier pendant la phase d'impression, on procède au réglage angulaire des contre-parties 17 et 9. La figure 6 représente un cas de réduction du format.To avoid cutting too much paper during the printing phase, the angular adjustment of the counterparts 17 and 9 is carried out. FIG. 6 represents a case of reduction of the format.

Le temps de contact dans le cycle se trouvera diminué pour s'approcher du format d'impression (celui- ci peut d'ailleurs être différent du format de l'imprimé), Exemple : la hauteur de l'imprimé peut être égale ou inférieure à la hauteur du format 1, 2, 3, 4, 5, 6, .... pouces pour un format de papier de 10 pouces.The contact time in the cycle will be reduced to approach the print format (this one this may also be different from the size of the print), Example: the height of the print can be equal to or less than the height of the format 1, 2, 3, 4, 5, 6, .... inches for a 10 inch paper size.

Le réglage de la contre-partie par rapport à la partie supérieure limite la boucle du papier en aval et de ce fait réduit la longueur de papier à rattraper pendant le temps libre. De plus, il augmente le temps libre par cycle, ce qui compense la croissance des écarts de vitesse moins → plus, plus → moins, lorsque le format diminue en laissant un temps de rattrapage plus long.The adjustment of the counterpart with respect to the upper part limits the loop of the paper downstream and thereby reduces the length of paper to be caught up during free time. In addition, it increases the free time per cycle, which compensates for the growth in speed differences minus → plus, plus → minus, when the format decreases leaving a longer catch-up time.

Dans cet exemple non limitatif, l'ouverture dans les cylindres 2 et 17 est calculée de telle sorte que leur réglage respectif puisse passer de la surface de contact maximum à une surface de contact minimale de la moitié du contact maximale.In this nonlimiting example, the opening in the cylinders 2 and 17 is calculated so that their respective adjustment can pass from the maximum contact surface to a minimum contact surface of half the maximum contact.

La variation de format correspond au choix du module de la pignonnerie qui commande l'avance du papier. Si une dent du pignon de format correspond à 1/6 de pouce, la variation de format pourra s'opérer chaque 1/6 de pouce.The format variation corresponds to the choice of the gearbox module which controls the advance of the paper. If a tooth of the format pinion corresponds to 1/6 of an inch, the variation of format may take place every 1/6 of an inch.

Les réglages permettent de réduire ou d'augmenter la surface de contact de la nappe et permettent donc de conserver un retour arrière pratiquement constant de la nappe de papier.The adjustments make it possible to reduce or increase the contact surface of the web and therefore make it possible to maintain a practically constant backward flow of the paper web.

L'invention n'est pas limitée aux moyens qui ont été décrits, et s'étend à l'utilisation de moyens équivalents.The invention is not limited to the means which have been described, and extends to the use of equivalent means.

Claims (4)

1. Procédé pour commander le format à imprimer d'une nappe alimentant sans tension une machine d'impres- sion à cylindre d'impression rotatif, cette machine fonctionnant par cycles successifs, chaque cycle étant défini par une rotation du cylindre d'impression et comportant une impression d'une plage de la nappe dans ledit format, caractérisé en ce qu'on fait avancer la nappe (4) pendant chaque cycle, alternativement à la vitesse d'impression pendant l'impression et à une vitesse d'appel au plus égale à la vitesse d'impression, en résorbant par un appel de la nappe vers l'arrière l'excès de longueur procuré par la vitesse d'impression sur la vitesse d'appel si cette dernière est inférieure à la vitesse d'impression, sans arrêter la nappe entre le défilement à vitesse d'appel et le défilement à vitesse d'impression, en sorte que le format, c'est-à-dire la longueur de la nappe qui défile à chaque cycle, est déterminé par la vitesse d'appel.1. Method for controlling the format to be printed of a web supplying a voltage-free printing machine with a rotary printing cylinder, this machine operating in successive cycles, each cycle being defined by a rotation of the printing cylinder and comprising a printing of a range of the web in said format, characterized in that the web (4) is advanced during each cycle, alternately at the printing speed during printing and at a speed of call to the more equal to the speed of printing, by absorbing by a call of the tablecloth towards the back the excess length obtained by the speed of printing on the speed of call if the latter is lower than the speed of printing , without stopping the tablecloth between scrolling at call speed and scrolling at printing speed, so that the format, that is to say the length of the tablecloth which scrolls at each cycle, is determined by the call speed. 2. Procédé selon la revendication 1, caractérisé en ce qu'on crée en permanence la vitesse d'appel.2. Method according to claim 1, characterized in that the call speed is constantly created. 3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on obtient la vitesse d'impression et la vitesse d'appel à partir d'une même prise de mouvement, le choix de la transmission permettant de changer la vitesse d'appel.3. Method according to claim 1 or 2, characterized in that the printing speed and the calling speed are obtained from the same power take-off, the choice of the transmission making it possible to change the speed of call. 4. Dispositif pour la mise en oeuvre d'un procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'il comprend en aval du cylindre d'impression (2), un premier organe rotatif sans fin (6) pour l'entraînement de la nappe à la vitesse d'impression et un deuxième organe rotatif sans fin (7) pour l'entraînement de la nappe à la vitesse d'appel.4. Device for implementing a method according to one of claims 1 to 3, characterized in that it comprises downstream of the printing cylinder (2), a first endless rotary member (6) for driving the web at the printing speed and a second endless rotary member (7) for driving the web at the calling speed.
EP80400528A 1979-04-18 1980-04-18 Variable format printing machine Expired EP0018291B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400528T ATE3763T1 (en) 1979-04-18 1980-04-18 PRINTING PRESS ADJUSTABLE TO DIFFERENT FORMATS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7909719A FR2454369A1 (en) 1979-04-18 1979-04-18 METHOD AND DEVICE FOR CONTROLLING THE SCROLLING OF A TABLECLOTH IN A PRINTING MACHINE
FR7909719 1979-04-18

Publications (2)

Publication Number Publication Date
EP0018291A1 true EP0018291A1 (en) 1980-10-29
EP0018291B1 EP0018291B1 (en) 1983-06-15

Family

ID=9224414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400528A Expired EP0018291B1 (en) 1979-04-18 1980-04-18 Variable format printing machine

Country Status (7)

Country Link
US (1) US4372206A (en)
EP (1) EP0018291B1 (en)
JP (1) JPS56500561A (en)
AT (1) ATE3763T1 (en)
DE (1) DE3063745D1 (en)
FR (1) FR2454369A1 (en)
WO (1) WO1980002258A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2049143A2 (en) * 1991-11-04 1994-04-01 Cremades Martinez Continuous multiprinting machine
EP0649740A1 (en) * 1993-09-17 1995-04-26 De La Rue Giori S.A. Printing unit for a web printing machine
US7017486B2 (en) 2003-03-14 2006-03-28 Werner Kammann Maschinenfabrik Gmbh Method and apparatus for printing a web
CN105015156A (en) * 2015-07-22 2015-11-04 河北海贺胜利印刷机械集团有限公司 Intermittent forward leapfrog printing machine, control method of intermittent forward leapfrog printing machine, and leapfrog traction device

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
FR2561175B1 (en) * 1984-03-15 1986-10-24 Codimag HIGH YIELD PRINTING METHOD AND DEVICE
US4839814A (en) * 1985-01-29 1989-06-13 Moore Business Forms, Inc. Size independent modular web processing line and modules
US4716802A (en) * 1986-01-20 1988-01-05 Corfine Inc. Scrap reduction system for rotary die cutter
US4751879A (en) * 1987-03-18 1988-06-21 Van Pelt Equipment Corporation Method and apparatus for intermittently processing successive definite lengths of a continuous flexible web
US5115737A (en) * 1990-04-16 1992-05-26 Philip Morris Incorporated Hot rotary stamper apparatus and methods for metal leaf stamping
US5417360A (en) * 1993-09-28 1995-05-23 Moore Business Forms, Inc. Feeding of offset, collated forms
US7926688B2 (en) * 2005-08-23 2011-04-19 Durst Phototechnik Ag Tension-controlled web processing machine and method

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US2039236A (en) * 1935-01-02 1936-04-28 Meisel Press Mfg Company All size rotary web press
US2845021A (en) * 1955-03-28 1958-07-29 Bemis Bro Bag Co Web feed means for rotary printing press
FR2025390A1 (en) * 1968-12-05 1970-09-11 American Bank Note Co
FR2342849A2 (en) * 1976-03-05 1977-09-30 Seailles Tison Atel Const Meca Feed control for variable paper sizes - provides adjustment through differential without stopping printing machine using stepping motors

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US3420158A (en) * 1967-01-31 1969-01-07 Signode Corp Strap feed and tensioning mechanism
US3762322A (en) * 1972-05-04 1973-10-02 G Vines Printing machine

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US2039236A (en) * 1935-01-02 1936-04-28 Meisel Press Mfg Company All size rotary web press
US2845021A (en) * 1955-03-28 1958-07-29 Bemis Bro Bag Co Web feed means for rotary printing press
FR2025390A1 (en) * 1968-12-05 1970-09-11 American Bank Note Co
FR2342849A2 (en) * 1976-03-05 1977-09-30 Seailles Tison Atel Const Meca Feed control for variable paper sizes - provides adjustment through differential without stopping printing machine using stepping motors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2049143A2 (en) * 1991-11-04 1994-04-01 Cremades Martinez Continuous multiprinting machine
EP0649740A1 (en) * 1993-09-17 1995-04-26 De La Rue Giori S.A. Printing unit for a web printing machine
CN1051281C (en) * 1993-09-17 2000-04-12 吉奥里街股份有限公司 Printing unit for a web-fed printing machine
US7017486B2 (en) 2003-03-14 2006-03-28 Werner Kammann Maschinenfabrik Gmbh Method and apparatus for printing a web
CN105015156A (en) * 2015-07-22 2015-11-04 河北海贺胜利印刷机械集团有限公司 Intermittent forward leapfrog printing machine, control method of intermittent forward leapfrog printing machine, and leapfrog traction device

Also Published As

Publication number Publication date
US4372206A (en) 1983-02-08
DE3063745D1 (en) 1983-07-21
EP0018291B1 (en) 1983-06-15
JPS56500561A (en) 1981-04-30
FR2454369A1 (en) 1980-11-14
ATE3763T1 (en) 1983-06-15
WO1980002258A1 (en) 1980-10-30

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