EP0660778B1 - Procede et dispositif visant a evacuer des plaques d'impression - Google Patents

Procede et dispositif visant a evacuer des plaques d'impression Download PDF

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Publication number
EP0660778B1
EP0660778B1 EP93920648A EP93920648A EP0660778B1 EP 0660778 B1 EP0660778 B1 EP 0660778B1 EP 93920648 A EP93920648 A EP 93920648A EP 93920648 A EP93920648 A EP 93920648A EP 0660778 B1 EP0660778 B1 EP 0660778B1
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EP
European Patent Office
Prior art keywords
printing plate
plate
printing
plate cylinder
cylinder
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
EP93920648A
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German (de)
English (en)
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EP0660778A1 (fr
Inventor
Wolfgang Günter Ruckmann
Erich Georg Wieland
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Koenig and Bauer AG
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Koenig and Bauer Albert AG
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Publication of EP0660778A1 publication Critical patent/EP0660778A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the invention relates to a method and a device for removing printing plates from plate cylinders of rotary printing presses in accordance with the preamble of claims 1 and 5.
  • a feed and discharge device for a printing press in which the printing plates are held when they are removed from the plate cylinder by means of guide rollers which can be adjusted to the periphery of the plate cylinder and associated actuating devices.
  • This is disadvantageous in that these adjustable plate pressure rollers, plus their actuating devices, both make access to the plate cylinder more difficult and require additional equipment.
  • it occupies a large part of the circumference of the plate cylinder with the aforementioned devices, so that only a limited number of rollers, for. B. inking rollers, may be present on the plate cylinder or the plate cylinder must be oversized.
  • a driven guide roller is used in the plate feed process, which is in contact with the sensitive side of the pressure plate.
  • the invention has for its object to provide a method for removing printing plates from a plate cylinder of a rotary printing press, and a device for performing the method.
  • a rotary printing machine has several printing units 1, z. B. four printing units, each containing, among other things, a plate cylinder 2, a blanket cylinder 3 and an impression cylinder 4. Furthermore, a number of inking rollers 6, 7, 8 and a dampening and inking roller 9 are arranged on the circumference of the plate cylinder 2, which can be adjusted to the plate cylinder 2 by known means, not shown. With the rollers 6 to 9 are still unspecified rubbing rollers in connection.
  • the cylinders 2 to 4 and rollers 6 to 9 are mounted directly or indirectly in side frames.
  • a discharge and feed device 12 for printing plates 13, 14 is provided on an access side 11 to the cylinders 2, 3, 4 of the printing unit 1.
  • This device 12 consists of an approximately printing plate-wide housing with two storage shafts 16, 17.
  • the housing viewed in section, has a slight curvature such that an upper part of the housing is initially oriented almost vertically and a lower part approximately in cross section expanded trapezoidal and runs in the direction of plate cylinder 2.
  • a front wall 18 of the housing extends over a pressure roller 19.
  • the pressure roller 19 is arranged approximately below the plate cylinder 2 and can be adjusted to the plate cylinder 2 by means of a working cylinder 21 fixed to the front wall and an angle lever 22 likewise mounted on the front wall 18.
  • the pressure roller 19 has a soft surface in relation to a pressure plate 13, 14, for. B. made of rubber or plastic.
  • a rear wall 23 of the housing extends to just before the last inking roller 8 above a line of contact 24 on which the inking roller 8 touches the plate cylinder 2 or the printing plate 13 on the plate cylinder 2, so that the rear wall 23 has a larger radius of curvature than the front wall 18.
  • the intermediate wall 26 is, however, shorter than the walls 18, 23 and ends in front of a transport device for pressure plates 13, 14, designated overall by 27.
  • the air ducts 28, 29 are delimited by air duct walls 32, 33 spaced apart from the front wall 18 and rear wall 23.
  • the air channels 28, 29 are not one shown compressed air supply system fed.
  • the air duct walls 32, 33, the front and rear walls 18, 23 and the intermediate wall 26 are each connected by end faces 34, which are symbolically represented by two tabs - shown in detail in FIG. 1. These end faces 34 extend from the upper part running in the vertical direction to the end of the trapezoidally widened part of the removal and supply device 12 on the periphery of the plate cylinder 2.
  • the transport device 27 consists of a drive roller 36 which is fixed on the end face and which has comb-like recesses in the axial direction on its periphery, into which fingers 37 engage, which are attached at approximately the bottom end of the intermediate wall 26.
  • This transport roller 36 is driven by a motor, e.g. B. driven a torque adjustable pneumatic motor.
  • a pressure roller 38 which can be adjusted at the lower end of the storage shaft 17 for printing plates 13 to be removed is arranged, which is connected to the piston rod of a working cylinder 41 likewise fixed to the rear wall via an angle lever 39 mounted on the rear wall.
  • a pressure roller 42 which can be set at the lower end of the storage shaft 16 for pressure plates 14 to be fed is arranged on this transport roller 36, which pressure roller 42 is attached to the piston rod of a likewise fixed to the front wall by means of an angle lever mounted on the front wall Working cylinder 44 is connected.
  • the pressure rollers 38, 42 have a soft, elastic surface, e.g. B. made of rubber.
  • a guide bar 46 which is trapezoidal in cross section and extends in the axial direction of the plate cylinder 2.
  • the underside and the top of the guide bar 46 are each concave and the radius of the plate cylinder 2 or the transport roller 36 aligned.
  • a first end face 47 of the guide bar 46 forms below the transport device 27 the boundary of the storage shaft 16 for the plate feed relative to the front wall 18.
  • a second end face 48 of the guide bar 46 forms below the transport device 27 the boundary of the storage shaft 17 for plate guiding with respect to the rear wall 23, or the lower end of the rear wall 23 pointing in the direction of the plate cylinder 2 is arranged at such a distance, forming an introduction 49, from the line of contact 24 of the last inking roller 8 seen in the direction of rotation with the plate cylinder 2, so that the printing plate 13 to be removed finds its way into this introduction 49 and can be further promoted by the storage shaft 17.
  • This insertion 49 tapers from the plate cylinder 2 in the direction of the transport device 27 and thus runs in a wedge shape in cross section.
  • the plate leading edge alignment unit 52 consists of a rotatable shaft 53 mounted in the end faces 34 of the discharge and supply device 12 with at least two dowel pins or register stops 51 protruding radially from the periphery of this shaft 53, which are fitted with fitting devices 54 at the beginning of the pressure plates 13 , 14 correspond.
  • the shaft 53 is connected via a rocker arm 50 via a joint to the piston rod of an articulated working cylinder 55 fixed to the front wall.
  • the removal and supply device 12 can be pivoted vertically upwards for repair and maintenance purposes of the printing unit 1 by two bearings 56, 57 fixed to the frame by means of a rocker 59 articulated on the front wall 18 and a double-armed lever 60 articulated on the front wall 18.
  • the double-armed lever 60 is connected with its first lever arm 58 via a frame-fixed bearing and with its second lever arm 61 via a joint to the piston rod of a working cylinder 62 fixed to the frame.
  • the plate cylinder 2 has a plate clamping device 64 and a plate clamping and clamping device 66 in a pit 63.
  • a plate clamping device 64 and a plate clamping and clamping device 66 in a pit 63.
  • Such a device is known from DE 36 04 071 C2.
  • On the plate clamps 64, 66 of the plate cylinder 2 2 openable and closable clamping flaps or gripper devices 67, 68 are arranged in the vicinity of the periphery of the plate cylinder, each of which cooperates with a gripper support surface 70.
  • the gripper device 67 is connected to the front edge, ie the start of the print, and the gripper device 68 is always connected to the rear edge, ie the print end of the respective printing plate 13, 14.
  • actuating means for actuating the gripper device 67, 68 or the plate clamping device 64, 66 are supplied with working medium via a rotary entry (not shown) on a pin of the plate cylinder 2.
  • the actuating means can be designed as hydraulic, pneumatic or electrical units.
  • the gripper device 67, 68 is usually designed as a gripper support bar.
  • the printing plate should be changed.
  • the plate cylinder 2 travels past the application rollers 9, 6, 7 with the start 69 of the printing plate 13, with the application rollers 6 to 9 turned on, up to a contact line 24 between the last application roller 8 seen in the direction of rotation of the plate cylinder 2 (counterclockwise) and the plate cylinder 2 with the printing plate 13 located therebetween
  • the gripper device 67 opens, and the pressure plate beginning 69 springs due to its inherent tension to the lower end 71 of the rear wall 23, so that the plate beginning 69 takes at least a tangential position to the plate cylinder 2 from the line of contact 24 (Fig. 1).
  • the printing plate start 69 reaches the tapering gap 49.
  • a new printing plate 14 may already be in the waiting position.
  • the pressure plate beginning 69 passes through the curved lower part of the storage shaft 17 as a result of the frictional engagement with the application rollers 6 to 9, the pressure roller 38 of the transport device 27 located in the lower part of the removal and supply device 12 being switched off and the air channels 28, 29 are permanently pressurized with compressed air, so that the sensitive side of the pressure plate 13, 14 is always spaced from the front wall 18 and the rear wall 23 of the feed and discharge device 12 (FIG. 2).
  • the new printing plate 14 with its printing plate start 72 is fed to the plate cylinder 2 and fastened thereon.
  • the end of the printing plate 13 reaches the line of contact 24 between the last application roller 8 and the plate cylinder 2 with the intermediate end of the pressure plate 13.
  • the gripper device 67 opens and the pressure roller 38 presses the pressure plate 13 with its flexible coating against the driven transport roller 36, so that the pressure plate 13 is conveyed further in the vertical direction to the outlet of the discharge and feed device 12.
  • the application rollers 6 to 9 can be turned off (Fig. 3).
  • the printing plate 14 is further applied by rotating the plate cylinder 2.
  • the pressure plate 13 While the plate cylinder 2 continues to rotate in the direction of production rotation, the pressure plate 13, as a result of the conveying movement of the transport device 27, reaches the fingers 37 with its end of the pressure plate, on which the pressure plate 13 is now provided for removal (FIG. 4). At the same time, the new printing plate 14 rests with its plate end on the plate cylinder 2 and is clamped.
  • the start of the plate removal from the plate cylinder 2 can also take place in such a way that after reaching a line of contact 73 between the circumference of the dampening roller 9 and the circumference of the plate cylinder 2 through the plate start 69, all on the circumference of the plate cylinder 2 adjacent application rollers 6 to 9 are parked, ie they are removed a few millimeters by known means.
  • the gripper bar 67 opens, so that the pressure plate 13 relaxes and loosely rests with its start 69 against the application rollers 6 to 9, so that the pressure plate 13 is conveyed to the storage shaft 17 in a positive and non-positive manner by the gripper bar 68.
  • the plate feed of a new printing plate 14 to the plate cylinder 2 is shown in more detail below.
  • the pressure plate 14 to be fed is inserted with its pressure plate start 72 into the storage shaft 16 of the discharge and feed device 12 when the pressure roller 42 of the transport device 27 is not in contact and engages with its fitting slots 54 located at the start of the plate into the shaft 53 located in the lower part of the shaft Memory shaft 16 protruding dowel pins 51, whereby the printing plate 14 is aligned.
  • the pressure plate 14 is thus on the plate alignment unit 52 in the waiting position (FIG. 1).
  • the shaft 53 is rotated by 90 °, so that the dowel pins 51 disengage from the fitting slots 54 at the plate start 72 of the pressure plate 14 with a soft elastic covering pressure roller 42 pressed against the pressure plate 14 and thus against the driven and counterclockwise transport roller 36 of the transport device 27.
  • the pressure roller 42 and the transport roller 36 run with a Peripheral speed, which is 1.1 to 1.2 times the peripheral speed of the plate cylinder 2, so that the aligned pressure plate 14 is fed to the plate cylinder 2 accelerated and moves with the fitting slots 54 against stops or dowel pins 51 which are on the plate cylinder 2, but in particular is mounted on the plate clamping device 64 located in the cylinder pit 63.
  • the gripper device 67 then closes and holds the pressure plate start 72 in a positive and non-positive manner.
  • the pressure roller 19, which is provided with a soft, elastic covering, is set against the plate cylinder 2 or against the pressure plate 14 located therebetween (FIG. 2).
  • the plate cylinder 2 now rotates further in the direction of production rotation and the pressure roller 42 pressing against the pressure plate 14 is pivoted away and thus brought into the rest position (FIG. 3).
  • the pressure plate 13 to be removed leaves the plate cylinder 2 and the gripper bar 68 thereby opened can grip the end of the pressure plate 14 in a non-positive and positive manner.
  • the pressure roller 19 is turned off.
  • the plate changing process is now complete (Fig. 4).
  • the plate feed to the plate cylinder 2 can also take place in such a way that a pressure plate 14 provided with fitting devices 54 at its plate start 72 from the storage shaft 16 in the direction of the plate cylinder 2 up to the plate front edge alignment unit 52 guided, then aligned there and held on hold.
  • the plate cylinder 2 then interrupts its rotational movement and the transport device 27 consisting of the pressure roller 42 and the driven transport roller 36 conveys the pressure plate 14 in the tangential direction to a gripper support surface 70 on the plate cylinder 2 (FIG. 10), on which register stops 51 are arranged.
  • the control computer 74 receives its information on the one hand from a position transmitter 76 for monitoring the contact of the printing plate 13, 14 with its fitting devices 54 on the stop 51 on the plate cylinder 2. On the other hand, the control computer receives 74 Information about a position sensor 77 attached to the plate cylinder 2. Furthermore, the control computer 74 is connected to a number of electro-magnetic valves 78 which, when a command is given, change the printing plate depending on the positions of the plate cylinder 2 and in connection with suitable software in the correct order and the working cylinder with working medium, e.g. B. supply compressed air from a pressure source 79. All electric drives, e.g. B.
  • control computer 74 works according to a flow chart (FIGS. 8 and 9), so that the Steps 101 to 107 or 201 to 216 are carried out automatically one after the other.
  • FIG. 8 shows the flowchart for releasing and removing the printing plate 13 from the plate cylinder 2 or inserting it into the storage shaft 17 of the removal and supply device 12.
  • a query 102 of the safety conditions is carried out, e.g. B. is the discharge and feed device 12 in the working position.
  • the device 12 could also be in a position remote from the cylinder by means of the manually operated working cylinder 62.
  • Appropriate sensors are then activated. Among other things there is also a query as to whether the storage slot 17 is free. If these conditions are not met, an interference signal 103 is generated. If all safety conditions are met, a start-up warning signal 104 is generated.
  • the plate cylinder 2 is rotated at creep speed into the plate cylinder position A (PZ position A) 105 according to FIG. 1.
  • the beginning 69 of the printing plate 13 has straight contact with the application roller 8 and the plate cylinder 2 at the contact line 24.
  • the plate tension is switched off in a step 106, the gripper bar 67 of the plate clamping device 69 is opened and the pressure roller 38 is issued by the working cylinder 41.
  • the end of the pressure plate 13 is reached in one step after further rotation of the plate cylinder 2 107 (FIG. 3) the line of contact 24 between the last application roller 8 and the plate cylinder 2 (PZ position B).
  • the gripper bar 68 of the plate clamping and tensioning device 66 opens and the pressure roller 38 in the storage shaft 17 is started.
  • the pressure plate 13 is ready for removal on the fingers 37.
  • FIG. 9 shows a flow chart according to which the control computer 74 works in conjunction with the other position indicators (for example rotary angle transmitter 77) so that the printing plate 14 is fed to the plate cylinder 2.
  • a start trigger 201 By actuating a start trigger 201, an interrogation 202 of the safety conditions is carried out (for example, the discharge and supply device 12 is in the working position). Appropriate sensors are then activated. If all safety conditions are not met, an interference signal 203 is generated. A start warning signal 204 is given when all safety conditions are met. A renewed actuation of the start trigger 201 activates the drive 81 of the plate cylinder 2.
  • a subsequent query 205 relates to the presence of a new pressure plate 14 in the storage shaft 16, the pressure plate start 72 of the pressure plate 14 with its fitting devices 54 receiving the stops or dowel pins 51 in a form-fitting manner. If the pressure plate 14 is missing, an interference signal 206 is generated. While the plate cylinder 2 with its open gripper device 67 is in a cylinder position C (FIG. 2) approaches the lower end of the storage shaft 16, the alignment unit 52 is switched off in a step 207 by actuating the working cylinder 55 and at the same time the pressure roller 42 is pressed in the direction of the rotating transport roller 38 by actuating the working cylinder 44. In a subsequent step 208, the plate cylinder 2 is rotated into a position C (FIG.
  • step 209 it is checked again whether the gripper bar 67 is still open and in a step 210 it is checked whether the pressure plate start 72 of the aligned pressure plate 14 is in contact with the stops 51 on the plate cylinder 2.
  • the position sensor 76 and the rotary angle sensor 77 are switched on. If the pressure plate start 72 is not applied or is not properly applied, an interference signal is generated.
  • a step 211 the gripper device 67 is closed and the pressure plate start 72 of the pressure plate 14 is held in a non-positive and positive manner and the pressure roller 19 is pivoted to the periphery of the plate cylinder 2 by means of the working cylinder 21.
  • a plate cylinder position D (FIG. 4) is reached in a next step 213, in which the end of the printing plate 14 lies on the plate cylinder 2 and subsequently in a step 214 through the Gripper bar 68 is held non-positively.
  • the pressure plate 14 is tensioned.
  • the pressure roller 19 is turned off in a step 215 by actuation by the working cylinder 21.
  • the plate changing process is finished.
  • an end 216 signal is generated.
  • the working cylinders 21, 41, 44, 55, 62 are designed as double-acting pneumatic working cylinders, the supply and discharge connections for the compressed air are not shown.
  • the plate clamping device 64 arranged in the cylinder pit 63 for fastening the pressure plate start 69, 72 can also be designed as a combined plate clamping and tensioning device.
  • the inking roller 8 can also be designed as a separate roller, i. H. for example, perform the function of a deflecting roller and can be actuated separately, d. H. from the inking rollers 6, 7, 9 can be adjusted separately to the plate cylinder 2.
  • FIG. 10 shows a section X - X according to FIG. 6 with an enlarged detailed illustration according to FIG. 2.
  • a circle 83 with the radius r 1 runs for the circumference of the plate cylinder 2 with its outer surface.
  • a Radisu r 2 extends from the axis of rotation 82 of the plate cylinder 2, a further circle 84, which almost reaches the gripper support surface 70.
  • the radius r 2 is smaller than the radius r 1 .
  • the storage slot 16 points at his part near the plate cylinder has a shaft end 86 which extends tangentially to a circle 83 or 84, the radius of which lies between the radius r 1 and r 2 .
  • the shaft end 86 extends tangentially to the plate cylinder 2 in III. Quadrants of a right-angled coordinate system related to the plate cylinder cross-section.
  • the storage shaft 17 has on its part near the plate cylinder a shaft end 87 which extends tangentially to a circle 83 or 84, the radius of which lies between the radius r 1 and r 2 .
  • the shaft end 87 extends tangentially to the plate cylinder 2 in the second quadrant of a right-angled coordinate system (FIG. 1).
  • the shaft ends 86, 87 lie opposite each other in the area of two adjacent quadrants II and III. However, they can also face each other in the adjacent quadrants I or IV or I and II.
  • the method can also be used advantageously for printing plates that are folded at one or both ends.
  • the further description is based on a tensioning device according to German patent application P 43 26 248.1. From this patent application a slotted, rotatable clamping spindle can be found, which is arranged in a pit of a plate cylinder. The front end of the folded printing plate is hooked into a mounting edge of the plate cylinder parallel to the cylinder. The end of the pressure plate is also folded in this case and in the Longitudinal slot of the clamping spindle inserted. This clamping spindle can be brought into any rotational angle position and stopped in it.
  • the folded printing plate end of the printing plate is at the latest when it passes the hooked, bent printing plate beginning - seen in the direction of production rotation - first inking roller 9 of the plurality of inking rollers 9 deposited by the plate cylinder; 6; 7; 8 lifted off.
  • the inking rollers in this case only serve to gently guide the loosened printing plate 13.
  • the inking rollers can rotate while the printing plate is being removed, but they can also stand still. If, as already stated, the beginning of the printing plate has preferably reached the area of the "leading inking rollers 6 to 9", the tensioning spindle is rotated a little in the direction of the printing plate to relax.
  • the pressure plate is relaxed and pushed a little towards the start of the pressure plate, since the bent end of the pressure plate is in the slot of the clamping spindle.
  • the fold line of the pressure plate end is supported either on the inner wall of the hanging bar or on the surface of the bent plate start facing the clamping spindle.
  • the pressure plate end preferably remains in this position ("pressure plate loosened ”) until the bent beginning of the printing plate in the suspended state has reached the area of the last guide roller, here the inking roller 8.
  • the tensioning spindle undergoes a further rotation in the direction of the printing plate and relaxes and pushes the printing plate end still in the slot
  • the folded end of the pressure plate automatically lifts out of the hanging bar due to its resilient properties and springs with its entire edging over the jacket of the plate cylinder 2.
  • the rebound through the last roller for example the inking roller 8
  • the beveled end of the pressure plate is automatically moved out of the slot in the tensioning shaft by the resilient properties of the pressure plate and is thereby completely free of the tensioning spindle.
  • the clamping spindle can be brought into any position, e.g. B. in that the clamping spindle has a toothing on its circumference, into which a toothing a rack, which is attached below the clamping spindle, can be moved into any position and held in it by means of an inflatable tube.
  • a corresponding rotation of the clamping spindle follows in accordance with the displacement of the rack.
  • the tension of a compression spring which acts on the rack on the side opposite the air hose, is used for tensioning. If the air hose is depressurized, this compression spring moves the tensioning spindle over the rack in the direction of the pressure plate.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

Dans un procédé et un dispositif visant à évacuer et à amener des plaques d'impression (13, 14), il s'agit d'amener délicatement le côté véhiculant la couleur d'une plaque d'impression jusqu'à un cylindre de plaque (2) ou bien de l'en évacuer. Selon l'invention, c'est possible lors de l'évacuation, du fait qu'au moins un rouleau en creux (6, 7, 8, 9) appuie sur la plaque d'impression qui se trouve sur le cylindre de plaque; que le début de la plaque d'impression (69) est ensuite dégagé et qu'il est inséré de manière élastique dans un puits de stockage (17) en raison de sa propre élasticité. Il est ensuite acheminé plus loin à l'aide d'un dispositif de transport.

Claims (5)

  1. Procédé visant à évacuer des plaques d'impression d'un cylindre porte-plaque tournant d'une machine à imprimer rotative, les plaques d'impression tendues étant fixées au cylindre porte-plaque par leur début et leur fin, caractérisé en ce qu'au moyen d'un dispositif de retenue, le début (69) de la plaque d'impression (13) du cylindre porte-plaque (2) tournant dans le sens de fabrication est libéré par la force de rappel inhérente au début de la plaque d'impression au plus tard directement après le passage du dernier rouleau applicateur d'encre (8) d'une pluralité de rouleaux applicateurs d'encre (9 ; 6 ; 7 ; 8), en ce que, en fonction de la rotation du cylindre porte-plaque (2) tournant dans le sens de fabrication, le début (69) de la plaque d'impression s'éloigne du cylindre porte-plaque (2) jusqu'à ce qu'il soit ensuite guidé, immédiatement après un contact avec le dernier rouleau applicateur d'encre (8), dans l'entrée (49) d'une cheminée de réserve (17) située immédiatement à la suite de ce dernier, en ce que, une fois que la fin de la plaque d'impression (13) a été libérée d'un dispositif de serrage (68 ; 51) et a quitté la plaque d'impression (13) dans la zone du dernier rouleau (8), la plaque d'impression (13) est alors saisie par un dispositif transporteur (36, 38), acheminée et finalement déposée dans la cheminée de réserve (17).
  2. Procédé visant à évacuer des plaques d'impression d'un cylindre porte-plaque tournant d'une machine à imprimer rotative, les plaques d'impression tendues étant fixées au cylindre porte-plaque par leur début et leur fin, caractérisé en ce que, au plus tard au passage du début biseauté accroché de la plaque d'impression devant le premier (9) - par rapport au sens de fabrication - d'une pluralité de rouleaux applicateurs d'encre (9 ; 6 ; 7 ; 8) décollés du cylindres porte-plaque (2), la fin de la plaque d'impression (13) est relâchée et légèrement décollée de la surface périphérique du cylindre porte-plaque, en ce que la fin de la plaque d'impression reste ensuite maintenue dans son dispositif de retenue et de tension en position 〈〈 plaque d'impression décollée 〉〉 jusqu'à ce que le début de la plaque d'impression ait atteint la zone du dernier rouleau applicateur d'encre (8), en ce que la plaque d'impression ainsi décollée (13) est alors poussée, par le cylindre porte-plaque (2) tournant dans le sens de fabrication, la fin de la plaque d'impression poursuivant son déplacement en direction du début de la plaque d'impression (= 〈〈 pousser la plaque d'impression 〉〉) jusqu'à ce que le début biseauté de la plaque d'impression soit sorti de son dispositif d'accrochage sous l'effet de sa force élastique propre ou sous l'action d'une force exercée sur le début du biseau, en ce que le début biseauté de la plaque d'impression est ensuite poussé dans l'entrée (49) d'un dispositif d'évacuation de plaque d'impression (38, 36, 37) immédiatement voisin du dernier rouleau applicateur d'encre (8) et est enfin déposé dans la cheminée de réserve (17).
  3. Procédé selon la revendication 2, caractérisé en ce que, au plus tard lorsque la fin de la plaque d'impression a franchi le dernier rouleau applicateur d'encre (8), ladite fin est complètement libérée du dispositif de retenue et de serrage de la fin de la plaque d'impression et parvient au moins au niveau de la surface périphérique du cylindre porte-plaque.
  4. Dispositif visant à réaliser le procédé conforme aux revendications 1 et 2, caractérisé en ce qu'une pluralité de rouleaux applicateurs d'encre (6 ; 7 ; 8 ; 9) sont disposés autour du cylindre porte-plaque (12) avec la possibilité d'être amenés dans une position décollée par rapport au cylindre porte-plaque (2), de sorte qu'ils font fonction de moyen de guidage de la plaque d'impression à évacuer.
  5. Dispositif visant à réaliser le procédé conforme aux revendications 2 et 3, caractérisé en ce qu'il est prévu, sur le cylindre porte-plaque (2), un dispositif pour retenir le début de la plaque d'impression, un bord d'accrochage parallèle à l'axe du cylindre porte-plaque et, pour retenir et serrer la fin biseautée de la plaque d'impression, un arbre de tension pourvu d'une fente parallèle à son axe et destiné à recevoir la fin de la plaque d'impression, en ce que ledit arbre de tension est prévu pour pouvoir être amené et maintenu au moins dans les positions 〈〈 recevoir la fin de la plaque d'impression 〉〉, 〈〈 tendre la fin de la plaque d'impression 〉〉, 〈〈 relâcher la fin de la plaque d'impression 〉〉 et dans la position 〈〈 libérer la fin de la plaque d'impression 〉〉, en ce que ledit arbre de tension est disposé de manière à pouvoir passer de la position 〈〈 plaque d'impression relâchée 〉〉 à la position 〈〈 plaque d'impression libérée 〉〉 et y être maintenu, et, lors du passage de l'arbre de tension de la position 〈〈 relâcher la plaque d'impression 〉〉 à la position 〈〈 libérer la fin de la plaque d'impression 〉〉, la fin biseautée de la plaque d'impression se trouve dans la lente de l'arbre de tension, et le bord plié du biseau de la fin de la plaque d'impression prend appui contre le biseau du début de la plaque d'impression ou contre le face du bord d'accrochage tournée vers la dépression du cylindre porte-plaque.
EP93920648A 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression Expired - Lifetime EP0660778B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4231900 1992-09-18
DE4231900 1992-09-18
PCT/DE1993/000878 WO1994006630A1 (fr) 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression

Publications (2)

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EP0660778A1 EP0660778A1 (fr) 1995-07-05
EP0660778B1 true EP0660778B1 (fr) 1996-12-27

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EP93920645A Expired - Lifetime EP0660776B1 (fr) 1992-09-18 1993-09-16 Procede visant a amener des plaques d'impression
EP93920648A Expired - Lifetime EP0660778B1 (fr) 1992-09-18 1993-09-17 Procede et dispositif visant a evacuer des plaques d'impression

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EP93920645A Expired - Lifetime EP0660776B1 (fr) 1992-09-18 1993-09-16 Procede visant a amener des plaques d'impression

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US (2) US5555811A (fr)
EP (2) EP0660776B1 (fr)
JP (2) JPH08501036A (fr)
DE (4) DE4394496D2 (fr)
WO (2) WO1994006628A1 (fr)

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DE19507908C2 (de) * 1995-03-07 1999-12-09 Heidelberger Druckmasch Ag Vorrichtung zum Abziehen und Halten einer Druckplatte, die von einem Plattenzylinder einer Rotationsdruckmaschine abgeführt wurde
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CN103260885B (zh) * 2010-10-07 2014-10-15 柯尼格及包尔公开股份有限公司 具有运输系统的印刷单元以及印刷厂中的后勤系统
DE102012014806A1 (de) * 2011-08-26 2013-02-28 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Druckplattenwechsel
FR3000429B1 (fr) * 2012-12-28 2017-02-10 Bobst Lyon Module d’impression pour imprimer a partir de cliches sur des elements en plaque et machine de transformation comprenant un tel module d’impression
DE102020209465B3 (de) * 2020-07-28 2021-07-15 Heidelberger Druckmaschinen Aktiengesellschaft Druckplatten-Greifsystem

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Also Published As

Publication number Publication date
EP0660776A1 (fr) 1995-07-05
DE4394497D2 (de) 1997-07-24
DE59304918D1 (de) 1997-02-06
EP0660778A1 (fr) 1995-07-05
DE59304916D1 (de) 1997-02-06
US5540151A (en) 1996-07-30
DE4394496D2 (de) 1995-09-21
WO1994006630A1 (fr) 1994-03-31
WO1994006628A1 (fr) 1994-03-31
US5555811A (en) 1996-09-17
EP0660776B1 (fr) 1996-12-27
JPH08501036A (ja) 1996-02-06
JPH08501038A (ja) 1996-02-06

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