EP0075900B1 - Register indicating device in a mechanism for tensioning the printing plates on the plate cylinder of an offset printing machine - Google Patents

Register indicating device in a mechanism for tensioning the printing plates on the plate cylinder of an offset printing machine Download PDF

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Publication number
EP0075900B1
EP0075900B1 EP82108869A EP82108869A EP0075900B1 EP 0075900 B1 EP0075900 B1 EP 0075900B1 EP 82108869 A EP82108869 A EP 82108869A EP 82108869 A EP82108869 A EP 82108869A EP 0075900 B1 EP0075900 B1 EP 0075900B1
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EP
European Patent Office
Prior art keywords
plate
cylinder
printing plate
printing
clamping
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
Application number
EP82108869A
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German (de)
French (fr)
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EP0075900A1 (en
Inventor
Burkhardt Dr. Wirz
Alfred Preuss
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.)
Grapho Metronic Mess und Regeltechnik GmbH and Co KG
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Grapho Metronic Mess und Regeltechnik GmbH and Co KG
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Publication of EP0075900A1 publication Critical patent/EP0075900A1/en
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Publication of EP0075900B1 publication Critical patent/EP0075900B1/en
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Classifications

    • 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
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/16—Registering devices with means for displacing the printing formes on the cylinders
    • 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
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the invention relates to a device for checking the register-accurate clamping of printing plates on the plate cylinder of an offset printing machine by means of clamping rails arranged in the cylinder channel, on each of which a plate end can be clamped by clamping rails and which are supported by clamping screws which can be screwed into the clamping rails and are supported on each channel wall Cylinder circumferential direction are movable, the adjustment of the tensioning rail clamping the front plate edge relative to the plate cylinder being controllable by electrical display devices with a stylus extending in the direction of adjustment.
  • Such a device is shown and described in DE-A-30 00 576.
  • the pressure plate is adjusted relative to the plate cylinder in such a way that, on the one hand, the pressure plate is initially adjusted to register bolts in the tensioning rail by means of register punchings known per se and is clamped on the tensioning rail by means of the clamping rail and then the tensioning rail relative to the front channel wall of the plate cylinder is adjusted using the tensioning screws with the aid of the adjustment device.
  • the known device is therefore a tensioning rail-related system, that is to say the adjusting device controls the position of the tensioning rail, but not directly the position of the pressure plate, and this can have the result that it is not ascertained if the pressure plate is not exactly opposite the register bolt is aligned. So it can happen that the device indicates the zero position of the tensioning rail, which holds the front plate edge, but that this does not reflect the actual zero position of the printing plate on the plate cylinder and therefore register differences occur during printing.
  • the invention is therefore based on the object of using an electrically indicating device to obtain an exact, plate-cylinder-related display of the position of the printing plate. This object is achieved with the characterizing features of the main claim.
  • the stylus tip of the stylus is in contact with a certain edge area of the printing plate front edge and there is a fixed relationship between this specific edge area and the positions of the printed images on the printing plate, since the mounting foils are stamped with the same register punch as the printing plates, the required registration accuracy is provided for multi-color printing .
  • the alignment of the pressure plate in the tensioning rails and the alignment of the mounting foils with respect to the pressure plates during plate production need not necessarily be carried out with the aid of the register punchings known per se, for example from US-A-3 835 778, but any other stitch alignment system can also be used find, sofe 1 a fixed relationship between the certain edge areas of the printing plate leading edge, at which the stylus tip of the stylus is present, and the positions of the printed images on the printing plate.
  • register punchings are used on the printing plate, it is advantageous to produce the register punchings and at the same time further punching edges as certain edge areas for the contact of the probe tips in a common punching process on the printing plate leading edge.
  • the tensioning rail and the clamping strip can have recesses in the level of the clamped pressure plate front edge and at the location of the specific edge area engage the styli and touch the specific edge areas.
  • a stylus with associated position control device is arranged near the two ends of the cylinder channel.
  • the control devices are attached with a stylus to guide rails in the cylinder channel, on which the tensioning rails are also supported.
  • the position of the stylus With the help of mechanical pre-adjustment means with which the position of the stylus can be roughly adjusted, it is then pre-adjusted to the zero position, and a precise fine adjustment can be carried out by electronic tuning if, as preferred, the longitudinal displacement of the stylus is detected by means of a capacitively operating length measuring device, as described in DE-A-28 30 432. This exact zero position is adjusted after the first prints with the device according to the invention.
  • the display device is designed as a measuring device indicating deviations on both sides of the zero position, that is, if the adjustment movement of the stylus relative to the zero position is not only ascertained but its size can be read.
  • the measuring device is battery-powered, so that no current leads to the device rotating quickly with the plate cylinder are necessary.
  • the display of the adjustment path of the stylus relative to its zero position allows the printer to arbitrarily adjust the printing plate on the plate cylinder if it detects a registration difference of a printing ink in the proof. The exact zero position of the stylus can then be restored very easily for the next printing process.
  • FIG. 1 shows the front edge of a printing plate 1, in which, in a manner known per se, register punchings 2 are made with a register punch and, at the same time, punched edges 3 are attached in the same punching process, on which, as will be explained later, styli of the control device according to the invention are present.
  • printed images 4 are attached which are in a spatial relationship which is fixed by the assembly to the register punchings 2 and thus also to the punching edges 3.
  • the pressure plate 1 is shown in its clamping position in a clamping rail 5, in which register bolts 6, 7 are present, against which the plate with its register punchings 2 is pushed before the plate 1 is clamped in the clamping rail 5.
  • the tensioning rail there are laterally recesses 16 which are so deep that the punched edges 3 are exposed at the front edge of the plate, so that the tips of styli 18 can rest there and the position of the pressure plate 1 relative to a guidance of the stylus can be determined.
  • FIG. 3 shows a section of a plate cylinder 10 in which 11 guide strips 14 for the tensioning rail 12 with their clamping strip 13 for the register system are fixed in a customary manner at the bottom of the cylinder channel.
  • the front edge of a pressure plate 1 is clamped in the same way as shown in FIG. 2, and the perspective illustration of this FIG. 3 shows how the stylus 18 plunges into the recess 16 of the tensioning rail 12 and the clamping rail 13 and is on the punched edge 3 supports.
  • the tensioning rail can be displaced with tensioning screws 15, which are supported on the front wall of the cylinder channel 11, whereby the pressure plate 1 can be adjusted in its position in relation to the guide strips 14.
  • the stylus 18 is guided in a measuring device 17, wherein it is within the measuring device 17 with, for example, the adjusting element one from DE-A -28 30 432 known capacitiveConnectnmei3- device can be connected, while the other elements of this length measuring device are fixed in the housing of the measuring device 17.
  • the entire measuring device 17 is also screwed onto the guide rails 14 with screws 21 when setting up the plate cylinder with the register system according to the invention.
  • the stylus 18 is able to determine changes in position of the punched edge 3 with the accuracy required for printing and to display them on a digital display 19 in relation to a zero position fixed when the machine was set up.
  • the measuring device permits a coarse mechanical adjustment for the set-up by means of a set screw designated 20, while after finding out the exact zero position of the stylus 18 the measuring counter 19 can be electronically fine-tuned, for example by resetting to zero.
  • FIG. 4 shows the entire pressure cylinder with the cylinder channel 11, in which the front clamping rail with clamping rail 13 and a rear clamping rail 22 are located, which are guided on the guide strips 14 and can be adjusted by clamping screws 15, 23.
  • the front edge of the pressure plate 1 is screwed into the front tensioning rail 13 and is pushed with its register punchings onto the register bolts 6, 7.
  • the side edges of the pressure plate 1 protrude laterally beyond the tensioning rails 13, 22, so that the punched-out areas with the punching edges 3 are exposed next to the tensioning rails and the styli of the two, arranged on both ends of the cylinder channel 11 and on one each Guide bar 14 screwed measuring devices 24 can freely attack the punched edges 3.
  • the main advantage of this construction is that there is a particularly large amount of space in the longitudinal direction of the capacitive length measuring device connected to the stylus 18.
  • the measuring device 24 can be supported on the Schmitz rings 25 of the plate cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Kontrolle des registergenauen Aufspannens von Druckplatten auf dem Plattenzylinder einer Offset-Druckmaschine mittels im Zylinderkanal angeordneter Spannschienen, auf denen jeweils ein Plattenende durch Klemmschienen festklemmbar ist und die durch in den Spannschienen verschraubbare, auf jeweils einer Kanalwand sich abstützende Spannschrauben in Zylinderumfangsrichtung bewegbar sind, wobei die Verstellung der die vordere Plattenkante einspannenden Spannschiene gegenüber dem Plattenzylinder durch elektrische Anzeigeeinrichtungen mit in Verstellrichtung verlaufendem Taststift kontrollierbar ist.The invention relates to a device for checking the register-accurate clamping of printing plates on the plate cylinder of an offset printing machine by means of clamping rails arranged in the cylinder channel, on each of which a plate end can be clamped by clamping rails and which are supported by clamping screws which can be screwed into the clamping rails and are supported on each channel wall Cylinder circumferential direction are movable, the adjustment of the tensioning rail clamping the front plate edge relative to the plate cylinder being controllable by electrical display devices with a stylus extending in the direction of adjustment.

Eine derartige Vorrichtung ist in der DE-A-30 00 576 dargestellt und beschrieben. Bei dieser Vorrichtung erfolgt die Justierung der Druckplatte gegenüber dem Plattenzylinder in der Weise, daß einerseits die Druckplatte mittels an sich bekannter Registerstanzungen zunächst auf Registerbolzen in der Spannschiene justiert und auf der Spannschiene mittels der Klemmschiene festgeklemmt wird und anschließend die Spannschiene gegenüber der vorderen Kanalwand des Plattenzylinders mit Hilfe der Spannschrauben unter Zuhilfenahme der Justiervorrichtung justiert wird. Es handelt sich bei der bekannten Vorrichtung also um ein spannschienenbezogenes System, das heißt, die Justiervorrichtung kontrolliert die Lage der Spannschiene, nicht jedoch unmittelbar die Lage der Druckplatte, und dies kann zur Folge haben, daß nicht festgestellt wird, wenn die Druckplatte nicht exakt gegenüber den Registerbolzen ausgerichtet ist. So kann es geschehen, daß die Vorrichtung zwar die « Nullage der Spannschiene, die die vordere Plattenkante hält, anzeigt, daß damit aber nicht die tatsächliche Nullage der Druckplatte auf dem Plattenzylinder wiedergegeben ist und damit beim Druck Passerdifferenzen auftreten.Such a device is shown and described in DE-A-30 00 576. In this device, the pressure plate is adjusted relative to the plate cylinder in such a way that, on the one hand, the pressure plate is initially adjusted to register bolts in the tensioning rail by means of register punchings known per se and is clamped on the tensioning rail by means of the clamping rail and then the tensioning rail relative to the front channel wall of the plate cylinder is adjusted using the tensioning screws with the aid of the adjustment device. The known device is therefore a tensioning rail-related system, that is to say the adjusting device controls the position of the tensioning rail, but not directly the position of the pressure plate, and this can have the result that it is not ascertained if the pressure plate is not exactly opposite the register bolt is aligned. So it can happen that the device indicates the zero position of the tensioning rail, which holds the front plate edge, but that this does not reflect the actual zero position of the printing plate on the plate cylinder and therefore register differences occur during printing.

Der Erfindung liegt deshalb die Aufgabe zugrunde, mit Hilfe einer elektrisch anzeigenden Einrichtung eine exakte, plattenzylinderbezogene Anzeige der Position der Druckplatte zu gewinnen. Diese Aufgabe wird mit den kennzeichnenden Merkmalen des Hauptanspruchs gelöst.The invention is therefore based on the object of using an electrically indicating device to obtain an exact, plate-cylinder-related display of the position of the printing plate. This object is achieved with the characterizing features of the main claim.

Durch das unmittelbare Abtasten der Druckplattenvorderkante mit Hilfe der Taststifte der Anzeigeeinrichtungen, die ihrerseits im Kanal des Plattenzylinders befestigt sind, kann eine fehlerhafte Ausrichtung der Registerstanzungen der Druckplatte gegenüber den Registerbolzen in der Spannschiene sich nicht lageverfälschend auswirken, da die Spannschiene aus der Meßkette herausgenommen ist. Der Drucker wird beim Aufspannen der Druckplatte die Spannschrauben der Spannschiene solange verdrehen, bis die Anzeigeeinrichtung die exakte Nullage der Druckplatte auf dem Plattenzylinder angibt. Da die Tastspitze des Taststiftes an einem bestimmten Kantenbereich der Druckplattenvorderkante ansteht und eine feste Beziehung zwischen diesem bestimmten Kantenbereich und den Positionen der Druckbilder auf der Druckplatte herrscht, da die Montagefolien mit derselben Registerstanze gestanzt sind wie die Druckplatten, ist für die erforderliche Passergenauigkeit beim Mehrfarbendruck vorgesorgt.Due to the direct scanning of the pressure plate leading edge with the help of the feeler pins of the display devices, which in turn are fastened in the channel of the plate cylinder, an incorrect alignment of the register punchings of the pressure plate with respect to the register bolts in the tensioning rail cannot have an incorrect position, since the tensioning rail is removed from the measuring chain. When the printing plate is clamped, the printer will turn the clamping screws of the clamping rail until the display device indicates the exact zero position of the printing plate on the plate cylinder. Since the stylus tip of the stylus is in contact with a certain edge area of the printing plate front edge and there is a fixed relationship between this specific edge area and the positions of the printed images on the printing plate, since the mounting foils are stamped with the same register punch as the printing plates, the required registration accuracy is provided for multi-color printing .

Die Ausrichtung der Druckplatte in den Spannschienen und die Ausrichtung der Montagefolien gegenüber den Druckplatten bei der Plattenherstellung muß nicht unbedingt mit Hilfe der an sich beispielsweise aus der US-A-3 835 778 bekannten Registerstanzungen vorgenommer werden, sondern es kann auch jedes andere Stiche Ausrichtsystem Anwendung finden, sofe 1 eine feste Beziehung zwischen den bestimmten Kantenbereichen der Druckplattenvorderkante, an denen die Tastspitze des Taststiftes ansteht, und den Positionen der Druckbilder auf der Druckplatte besteht.The alignment of the pressure plate in the tensioning rails and the alignment of the mounting foils with respect to the pressure plates during plate production need not necessarily be carried out with the aid of the register punchings known per se, for example from US-A-3 835 778, but any other stitch alignment system can also be used find, sofe 1 a fixed relationship between the certain edge areas of the printing plate leading edge, at which the stylus tip of the stylus is present, and the positions of the printed images on the printing plate.

Wird jedoch mit den obengenannten Registerstanzungen an der Druckplatte gearbeitet, so ist es von Vorteil, in einem gemeinsamen Stanzvorgang an der Druckplattenvorderkante die Registerstanzungen und zugleich weitere Stanzkanten als bestimmte Kantenbereiche für die Anlage der Tastspitzen herzustellen.If, however, the above-mentioned register punchings are used on the printing plate, it is advantageous to produce the register punchings and at the same time further punching edges as certain edge areas for the contact of the probe tips in a common punching process on the printing plate leading edge.

Läßt es der Platz seitlich der Spannschienen im Zylinderkanal nicht zu, daß die Taststifte an beiderseits seitlich neben der Spannschiene vorstehenden Kantenbereichen der Druckplattenvorderkante angreifen, so können die Spannschiene und die Klemmleiste im Niveau der eingespannten Druckplattenvorderkante und am Ort des bestimmten Kantenbereichs Aussparungen aufweisen, in die die Taststifte eingreifen und darin die bestimmten Kantenbereiche berühren. Üblicherweise ist je ein Taststift mit zugehöriger Lagekontrolleinrichtung nahe den beiden Enden des Zylinderkanals angeordnet.If the space on the side of the tensioning rails in the cylinder channel does not allow the feeler pins to engage edge areas of the pressure plate leading edge protruding on both sides next to the tensioning rail, the tensioning rail and the clamping strip can have recesses in the level of the clamped pressure plate front edge and at the location of the specific edge area engage the styli and touch the specific edge areas. Usually, a stylus with associated position control device is arranged near the two ends of the cylinder channel.

Bei der Einrichtung einer Druckmaschine mit der erfindungsgemäßen Vorrichtung werden die Kontrollvorrichtungen mit Taststift auf Führungsleisten im Zylinderkanal befestigt, auf denen sich auch die Spannschienen abstützen. Mit Hilfe mechanischer Vorjustiermittel, mit denen die Position des Taststiftes grob justierbar ist, wird dieser dann auf die Nullposition vorjustiert, und eine genaue Feinjustierung kann durch elektronische Abstimmung erfolgen, wenn, wie bevorzugt, die Längsverschiebung des Taststiftes mittels einer kapazitiv arbeitenden Längenmeßeinrichtung erfaßt wird, wie sie in der DE-A-28 30 432 beschrieben ist. Diese exakte Nullstellung wird nach den ersten Drucken mit der erfindungsgemäßen Vorrichtung einjustiert.When setting up a printing press with the device according to the invention, the control devices are attached with a stylus to guide rails in the cylinder channel, on which the tensioning rails are also supported. With the help of mechanical pre-adjustment means with which the position of the stylus can be roughly adjusted, it is then pre-adjusted to the zero position, and a precise fine adjustment can be carried out by electronic tuning if, as preferred, the longitudinal displacement of the stylus is detected by means of a capacitively operating length measuring device, as described in DE-A-28 30 432. This exact zero position is adjusted after the first prints with the device according to the invention.

Vorteilhaft ist es, wenn die Anzeigeeinrichtung als Abweichungen beiderseits der Nullstellung anzeigende Meßeinrichtung ausgebildet ist, das heißt, wenn die Verstellbewegung des Taststiftes gegenüber der Nullposition nicht nur festgestellt wird sondern in ihrer Größe ablesbar ist. Dies ist mit Hilfe der obengenannten kapazitiven Längenmeßvorrichtung nach DE-A-28 30 432 leicht zu verwirklichen, wobei eine genaue Digitalanzeige der Abweichung gewonnen wird. Außerdem ist die Meßeinrichtung batteriegespeist, so daß keine Stromzuführungen zu der schnell mit dem Plattenzylinder umlaufenden Vorrichtung nötig sind. Die Anzeige des Verstellweges des Taststiftes gegenüber seiner Nullposition erlaubt dem Drucker eine willkürliche Verstellung der Druckplatte auf dem Plattenzylinder, wenn er im Andruck eine Passerdifferenz einer Druckfarbe feststellt. Für den nächsten Druckvorgang ist dann sehr leicht die exakte Nullposition des Taststiftes wieder herstellbar.It is advantageous if the display device is designed as a measuring device indicating deviations on both sides of the zero position, that is, if the adjustment movement of the stylus relative to the zero position is not only ascertained but its size can be read. This is with the aid of the above-mentioned capacitive length measuring device according to DE-A-28 30 432 easy to implement, an accurate digital display of the deviation being obtained. In addition, the measuring device is battery-powered, so that no current leads to the device rotating quickly with the plate cylinder are necessary. The display of the adjustment path of the stylus relative to its zero position allows the printer to arbitrarily adjust the printing plate on the plate cylinder if it detects a registration difference of a printing ink in the proof. The exact zero position of the stylus can then be restored very easily for the next printing process.

Nachfolgend wird die Erfindung anhand der Zeichnung im einzelnen erläutert. Es zeigen :

  • Figur 1 die vordere Plattenkante einer Offset-Druckplatte ;
  • Figur 2 die in die vordere Spannschiene eingespannte Vorderkante der Druckplatte, wobei die Klemmschrauben der Spannschiene und die Spannschrauben weggelassen sind ;
  • Figur 3 eine vergrößerte Ausschnittsdarstellung der einen Seite des Zylinderkanals mit vorderer Spannschiene und erfindungsgemäßer Kontrollvorrichtung ;
  • Figur 4 eine Draufsicht auf den Druckzylinder an der Stelle des Zylinderkanals, wobei nur die Vorderkante einer Druckplatte eingespannt dargestellt ist.
The invention is explained in detail below with reference to the drawing. Show it :
  • Figure 1 shows the front plate edge of an offset printing plate;
  • 2 shows the front edge of the pressure plate clamped in the front clamping rail, the clamping screws of the clamping rail and the clamping screws being omitted;
  • Figure 3 is an enlarged sectional view of one side of the cylinder channel with a front clamping rail and control device according to the invention;
  • Figure 4 is a plan view of the printing cylinder at the location of the cylinder channel, only the front edge of a printing plate being shown clamped.

In der Figur 1 ist die Vorderkante einer Druckplatte 1 gezeigt, in der in an sich bekannter Weise mit einer Registerstanze Registerstanzungen 2 und zugleich im selben Stanzvorgang Stanzkanten 3 angebracht sind, an denen, wie später noch erläutert wird, Taststifte der erfindungsgemäßen Kontrollvorrichtung anstehen. Wie ebenfalls bekannt, sind im Vorbereitungsvorgang der Druckplatte 1 für den Druck darauf Druckbilder 4 angebracht, die zu den Registerstanzungen 2 und damit auch zu den Stanzkanten 3 in einer durch die Montage festen räumlichen Beziehung stehen.1 shows the front edge of a printing plate 1, in which, in a manner known per se, register punchings 2 are made with a register punch and, at the same time, punched edges 3 are attached in the same punching process, on which, as will be explained later, styli of the control device according to the invention are present. As is also known, in the preparation process of the printing plate 1 for printing thereon, printed images 4 are attached which are in a spatial relationship which is fixed by the assembly to the register punchings 2 and thus also to the punching edges 3.

In der Figur 2 ist die Druckplatte 1 in ihrer Einspannlage in einer Spannschiene 5 gezeigt, in der Registerbolzen 6, 7 vorhanden sind, gegen die vor dem Festklemmen der Platte 1 in der Spannschiene 5 die Platte mit ihren Registerstanzungen 2 angeschoben wird. In der Spannschiene befinden sich seitlich Aussparungen 16, die so tief sind, daß die Stanzkanten 3 an der Plattenvorderkante freiliegen, so daß die Spitzen von Taststiften 18 dort anstehen können und damit die Position der Druckplatte 1 gegenüber einer Führung der Taststifte feststellbar ist.In FIG. 2, the pressure plate 1 is shown in its clamping position in a clamping rail 5, in which register bolts 6, 7 are present, against which the plate with its register punchings 2 is pushed before the plate 1 is clamped in the clamping rail 5. In the tensioning rail there are laterally recesses 16 which are so deep that the punched edges 3 are exposed at the front edge of the plate, so that the tips of styli 18 can rest there and the position of the pressure plate 1 relative to a guidance of the stylus can be determined.

In der Figur 3 ist ein Ausschnitt eines Plattenzylinders 10 gezeigt, in dem in üblicher Weise am Boden des Zylinderkanals 11 Führungsleisten 14 für die Spannschiene 12 mit ihrer Klemmleiste 13 für das Registersystem genau justiert festgelegt sind. In der Spannschiene ist in derselben Weise, wie in Figur 2 in Draufsicht dargelegt, die Vorderkante einer Druckplatte 1 eingespannt, und die perspektivische Darstellung dieser Figur 3 zeigt, wie der Taststift 18 in die Aussparung 16 von Spannschiene 12 und Klemmschiene 13 eintaucht und sich auf der Stanzkante 3 abstützt.FIG. 3 shows a section of a plate cylinder 10 in which 11 guide strips 14 for the tensioning rail 12 with their clamping strip 13 for the register system are fixed in a customary manner at the bottom of the cylinder channel. In the tensioning rail, the front edge of a pressure plate 1 is clamped in the same way as shown in FIG. 2, and the perspective illustration of this FIG. 3 shows how the stylus 18 plunges into the recess 16 of the tensioning rail 12 and the clamping rail 13 and is on the punched edge 3 supports.

Die Spannschiene kann mit Spannschrauben 15, die sich an der Vorderwand des Zylinderkanals 11 abstützen, verschoben werden, womit die Druckplatte 1 in ihrer Position gegenüber den Führungsleisten 14 verstellbar ist. Um eine exakte Kontrolle der Position der Druckplatte 1 auf dem Plattenzylinder 10 und damit auch gegenüber den Führungsleisten 14 feststellen zu können, ist der Taststift 18 in einer Meßvorrichtung 17 geführt, wobei er innerhalb der Meßvorrichtung 17 mit beispielsweise dem Verstellglied einer aus der DE-A-28 30 432 bekannten kapazitiven Längenmei3- einrichtung verbunden sein kann, während die übrigen Elemente dieser Längenmeßeinrichtung im Gehäuse der Meßvorrichtung 17 fest angeordnet sind. Die gesamte Meßvorrichtung 17 ist überdies beim Einrichten des Plattenzylinders mit dem erfindungsgemäßen Registersystem auf den Führungsleisten 14 mit Schrauben 21 festgeschraubt.The tensioning rail can be displaced with tensioning screws 15, which are supported on the front wall of the cylinder channel 11, whereby the pressure plate 1 can be adjusted in its position in relation to the guide strips 14. In order to be able to determine an exact control of the position of the printing plate 1 on the plate cylinder 10 and thus also with respect to the guide strips 14, the stylus 18 is guided in a measuring device 17, wherein it is within the measuring device 17 with, for example, the adjusting element one from DE-A -28 30 432 known capacitive Längenmei3- device can be connected, while the other elements of this length measuring device are fixed in the housing of the measuring device 17. The entire measuring device 17 is also screwed onto the guide rails 14 with screws 21 when setting up the plate cylinder with the register system according to the invention.

Der Taststift 18 ist in der Lage, Stellungsver- änderungen der Stanzkante 3 mit der für den Druck erforderlichen Genauigkeit festzustellen und an einer digitalen Anzeige 19 gegenüber einer beim Einrichten der Maschine festgelegten Nullposition anzuzeigen. Die Meßvorrichtung erlaubt für das Einrichten durch eine mit 20 bezeichnete Stellschraube eine mechanische Grobjustierung, während nach dem Herausfinden der exakten Nullstellung des Taststiftes 18 das Meßzählwerk 19 beispielsweise durch Rücksetzen auf Null elektronisch feinjustiert werden kann.The stylus 18 is able to determine changes in position of the punched edge 3 with the accuracy required for printing and to display them on a digital display 19 in relation to a zero position fixed when the machine was set up. The measuring device permits a coarse mechanical adjustment for the set-up by means of a set screw designated 20, while after finding out the exact zero position of the stylus 18 the measuring counter 19 can be electronically fine-tuned, for example by resetting to zero.

Die Draufsicht der Figur 4 zeigt den gesamten Druckzylinder mit dem Zylinderkanal 11, in dem sich die vordere Spannschiene mit Klemmschiene 13 und eine hintere Spannschiene 22 befinden, welche auf den Führungsleisten 14 geführt und durch Spannschrauben 15, 23 verstellt werden können. Die Vorderkante der Druckplatte 1 ist in die vordere Spannschiene 13 eingeschraubt und dabei mit ihren Registerstanzungen an die Registerbolzen 6, 7 angeschoben. Im Falle des hier dargestellten Ausführungsbeispiels ragen die Seitenkanten der Druckplatte 1 seitlich über die Spannschienen 13, 22 vor, so daß die Ausstanzungen mit den Stanzkanten 3 neben den Spannschienen freiliegen und die Taststifte der beiden, an beiden Enden des Zylinderkanals 11 angeordneten und auf je einer Führungsleiste 14 festgeschraubten Meßvorrichtungen 24 unbehindert an den Stanzkanten 3 angreifen können.The top view of FIG. 4 shows the entire pressure cylinder with the cylinder channel 11, in which the front clamping rail with clamping rail 13 and a rear clamping rail 22 are located, which are guided on the guide strips 14 and can be adjusted by clamping screws 15, 23. The front edge of the pressure plate 1 is screwed into the front tensioning rail 13 and is pushed with its register punchings onto the register bolts 6, 7. In the case of the exemplary embodiment shown here, the side edges of the pressure plate 1 protrude laterally beyond the tensioning rails 13, 22, so that the punched-out areas with the punching edges 3 are exposed next to the tensioning rails and the styli of the two, arranged on both ends of the cylinder channel 11 and on one each Guide bar 14 screwed measuring devices 24 can freely attack the punched edges 3.

Der Vorteil dieser Konstruktion besteht hauptsächlich darin, daß besonders viel Platz in Längsrichtung der mit dem Taststift 18 verbundenen kapazitiven Längenmeßeinrichtung vorhanden ist. Zur weiteren Stabilisierung kann sich die Meßvorrichtung 24 an den Schmitz-Ringen 25 des Plattenzylinders abstützen.The main advantage of this construction is that there is a particularly large amount of space in the longitudinal direction of the capacitive length measuring device connected to the stylus 18. For further stabilization, the measuring device 24 can be supported on the Schmitz rings 25 of the plate cylinder.

Die Darstellungen der Figuren 3 und 4 zeigen deutlich, daß mit den einmal bei der Einrichtung der Druckmaschine mit dem erfindungsgemäßen Registersystem festgeschraubten und grob und fein auf die Nullposition justierten Taststiften 18 der Meßvorrichtungen 17 bzw. 24 unmittelbar die Position einer auf den Plattenzylinder aufgezogenen Druckplatte 1 gegenüber dem Plattenzylinder 10 selbst festgestellt wird, unabhängig von eventuellen Einspannfehlern des vorderen Plattenendes mit seinen Registerstanzungen 2 in die vordere Spannschiene 5 bzw. 12, 13.The representations of Figures 3 and 4 clearly show that with the once when setting up the printing press with the invention Register system screwed and coarsely and finely adjusted to the zero position styli 18 of the measuring devices 17 and 24, the position of a printing plate 1 mounted on the plate cylinder relative to the plate cylinder 10 itself is determined, regardless of any clamping errors of the front plate end with its register punchings 2 in the front Clamping rail 5 or 12, 13.

Claims (7)

1. Device for controlling the clamping of printing plates (1) in correct register on the plate cylinder (10) of an offset printing machine by means of clamping bars (5, 12, 22) which are arranged in the cylinder channel (11) and on which one end in each case of a printing plate can be held by gripping strips (13) and which are movable in the peripheral direction of the cylinder by means of tightening screws, whereby the displacement of the clamping bar holding the front edge (3) of the plate is controllable with respect to the plate cylinder by means of electrical indicator arrangements (17, 24) with a feeler (18) extending in the direction of movement, characterized in that the electrical indicator arrangements (17, 24) with the feeler (18) are fastened to the plate cylinder (10) in the cylinder channel (11), the sensing tip of the feeler (18) lines up with a specific region of the front edge of the printing plate (1), and the positions of the images (4) on the printing plate (1) have a fixed relationship to the specific region (3) of the front edge of the printing plate.
2. Device as claimed in claim 1 with registration cut-outs which are known per se on the printing plate, characterized in that the specific region (3) has a fixed spatial relationship to the registration cut-outs (2).
3. Device as claimed in claim 2, characterized in that the specific region (3) is an edge cut-out and is produced with a registration cut-out (2) in one common punching operation.
4. Device as claimed in claim 1, 2 or 3, characterized in that the clamping bar (12) and the gripping strip (13) have recesses (16) in which the feelers (18) engage and touch the specific regions (3) level with the clamped front edge of the printing plate (1) and the location of the specific regions (3).
5. Device as claimed in claim 1, characterized in that the feeler (18) has mechanical preadjustment means (20) and an electronic fine adjustment arrangement for the exact zero position.
6. Device as claimed in claim 1, characterized in that the indicator arrangement is constructed as a measuring device indicating deviations on either side of the zero position.
7. Device as claimed in claim 6, characterized in that the measuring device is battery-powered and has a digital indicator (19).
EP82108869A 1981-09-30 1982-09-24 Register indicating device in a mechanism for tensioning the printing plates on the plate cylinder of an offset printing machine Expired EP0075900B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3138865A DE3138865C2 (en) 1981-09-30 1981-09-30 Device for checking the exact register clamping of printing plates on the plate cylinder of an offset printing machine
DE3138865 1981-09-30

Publications (2)

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EP0075900A1 EP0075900A1 (en) 1983-04-06
EP0075900B1 true EP0075900B1 (en) 1985-01-09

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EP82108869A Expired EP0075900B1 (en) 1981-09-30 1982-09-24 Register indicating device in a mechanism for tensioning the printing plates on the plate cylinder of an offset printing machine

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US (1) US4437407A (en)
EP (1) EP0075900B1 (en)
DE (1) DE3138865C2 (en)

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DE4226780A1 (en) * 1992-08-13 1994-02-24 Roland Man Druckmasch Device for checking the correct registration of a printing plate on the plate cylinder of printing machines, in particular sheetfed offset printing machines
DE102010028686A1 (en) * 2010-05-06 2011-11-10 Manroland Ag Mold cylinder for printing press, has clamping unit for clamping pressure plate on lateral surface of mold cylinder, where clamping unit is integrated in clamping channel

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JPH0778633B2 (en) * 1987-02-12 1995-08-23 有限会社加茂電機研究所 Register puncher for forming a U-shaped notch for setting on a printing press
DE3731684A1 (en) * 1987-09-21 1989-04-06 Koenig & Bauer Ag CLAMPING DEVICE
US5052120A (en) * 1990-04-16 1991-10-01 Eastman Kodak Company Sheet positioning, clamping, and tensioning means
JP2570485Y2 (en) * 1991-06-24 1998-05-06 株式会社小森コーポレーション Plate changing device for printing press
EP0534214B1 (en) * 1991-09-20 1996-03-06 Heidelberger Druckmaschinen Aktiengesellschaft Method and device for correcting trapezoidal register deviations
JP3194199B2 (en) * 1992-01-17 2001-07-30 株式会社小森コーポレーション Plate mounting device on plate cylinder
JP2573515Y2 (en) * 1992-02-10 1998-06-04 株式会社小森コーポレーション Plate vise origin position confirmation device for printing press
DE4223908C2 (en) * 1992-06-30 1995-09-28 Lehner Gmbh Clamping device for clamping and adjusting a printing plate on a plate cylinder
JP2573523Y2 (en) * 1992-07-31 1998-06-04 株式会社小森コーポレーション Plate mounting device for printing press
DE9215069U1 (en) * 1992-11-05 1992-12-17 MAN Roland Druckmaschinen AG, 6050 Offenbach Device for the correct registration of printing plates on the plate cylinder of printing machines
DE4306237A1 (en) * 1993-02-27 1994-09-01 Heidelberger Druckmasch Ag Device for setting the inclined register in a clamping device for clamping printing plates in an offset printing machine
DE4338664C2 (en) * 1993-11-12 1995-09-14 Roland Man Druckmasch Method and device for controlling an automated printing plate changing process in printing machines
DE19803723A1 (en) * 1998-01-30 1999-08-05 Heidelberger Druckmasch Ag Method and device for pre-positioning a printing plate in register
DE10007819A1 (en) * 1999-03-10 2000-09-14 Heidelberger Druckmasch Ag Method for locating the position of a printing plate on the cylinder of a rotary press has a pair of contact sensors with spring-loaded armatures
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US6691616B2 (en) * 1999-05-07 2004-02-17 Heidelberger Druckmaschinen Ag Device for detecting the position of a printing plate on a cylinder of a rotary printing machine
FR2795988B1 (en) * 1999-07-09 2002-01-18 Komori Chambon DEVICE FOR POSITIONING A PLATE ON A MAGNETIC FIXING CYLINDER

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Publication number Priority date Publication date Assignee Title
DE4226780A1 (en) * 1992-08-13 1994-02-24 Roland Man Druckmasch Device for checking the correct registration of a printing plate on the plate cylinder of printing machines, in particular sheetfed offset printing machines
DE102010028686A1 (en) * 2010-05-06 2011-11-10 Manroland Ag Mold cylinder for printing press, has clamping unit for clamping pressure plate on lateral surface of mold cylinder, where clamping unit is integrated in clamping channel

Also Published As

Publication number Publication date
EP0075900A1 (en) 1983-04-06
DE3138865A1 (en) 1983-04-14
US4437407A (en) 1984-03-20
DE3138865C2 (en) 1983-12-29

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