EP0426022B1 - Cylindre de plaque dans une machine d'impression - Google Patents

Cylindre de plaque dans une machine d'impression Download PDF

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Publication number
EP0426022B1
EP0426022B1 EP90120550A EP90120550A EP0426022B1 EP 0426022 B1 EP0426022 B1 EP 0426022B1 EP 90120550 A EP90120550 A EP 90120550A EP 90120550 A EP90120550 A EP 90120550A EP 0426022 B1 EP0426022 B1 EP 0426022B1
Authority
EP
European Patent Office
Prior art keywords
plate cylinder
tensioning rail
tensioning
rail
plate
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
EP90120550A
Other languages
German (de)
English (en)
Other versions
EP0426022A2 (fr
EP0426022A3 (en
Inventor
Claus Simeth
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0426022A2 publication Critical patent/EP0426022A2/fr
Publication of EP0426022A3 publication Critical patent/EP0426022A3/de
Application granted granted Critical
Publication of EP0426022B1 publication Critical patent/EP0426022B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • 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
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/40—Adjusting means for printing plates on the cylinder
    • B41P2227/43—Adjusting means for printing plates on the cylinder diagonally
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/36—Means for registering or alignment of print plates on print press structure

Definitions

  • the invention relates to a device for register correction by moving a printing plate on a plate cylinder of a printing press with the features of the preamble of claim 1.
  • EP-0-232 730 A3 describes a device with the features of the preamble of claim 1, in which the rear tensioning rail can be tilted to relax the pressure plate.
  • the invention avoids the disadvantages described. It is based on the object of proposing a device with the features of the preamble of claim 1, in which it is possible with structurally simple means, the relevant one Bring color back into register very quickly, if necessary even when the machine is running.
  • At least one pressure sensor is provided which measures the force between the plate cylinder and the rear tensioning rail.
  • the pressure sensor will generally be arranged on the means for adjusting the rear tensioning rail or also on the rail itself. It serves to test the positive connection between the adjustment means and the rear tensioning rail or components connected to it. This results in a corresponding stepping of the servomotor for the adjustment of the rear tensioning rail.
  • an embodiment of the invention is important, wherein at least two foils are arranged between the top of the plate cylinder and the bottom of the pressure plate, the surfaces of which each have different sliding friction coefficients, the surfaces with the good sliding properties lying on top of one another.
  • the two foils slide together with their smooth surfaces. With their rougher surfaces, they rest on the plate cylinder or on the pressure plate.
  • foils are mentioned above and below, they are to be understood to mean any thin, foil-like, flexible structure, for example made of paper material, cardboard, plastic and the like. It is only essential in this connection that one side of the foils has a low coefficient of friction.
  • Such films can be plastic-coated on one side, for example, the coated side then having the desired, good sliding properties.
  • the swiveling of the front clamping rail is also transferred to the rear clamping rail via the pressure plate.
  • the tensioning rails are in their direction of adjustment, i.e. performed in the circumferential direction.
  • This guide for the rear tensioning rail must now be designed according to the invention in such a way that the guide remains in the adjustment direction, but nevertheless swings sideways, i.e. is essentially possible in the axial direction of the plate cylinder.
  • the invention further proposes that a guide for the rear tensioning rail is provided in its adjustment direction, which has a rubber-elastic Element also allows displacement of the rear tensioning rail in the axial direction.
  • the rubber-elastic element ensures a sufficiently long guide in the direction of adjustment of the rear tensioning rail and at the same time enables the rear tensioning rail to be pivoted by the relatively small swivel path.
  • a preferred design solution for this provides that a guide screw is screwed into the rear tensioning rail, the shaft of which is guided in a guide recess in the pit, a rubber body being pushed onto the screw shaft.
  • the rubber body is correspondingly compressed by contacting the right or left wall of the recess, and this enables the desired compensation or the necessary lateral deflection of the rear tensioning rail while maintaining its guidance in the adjustment direction, i.e. in the circumferential direction.
  • this rubber guide serves to center the rear tensioning rail.
  • FIG. 1 The printed image of a specific inking unit of a printing press, possibly a multicolor printing press, is indicated by solid lines 1. Triangular black markings 2 at the corners of the printed image 1 indicate the correct position of this printed image in the printing press. Corresponding markings of further inking units must therefore coincide with the markings 2. These markings 2 thus to a certain extent define the zero position.
  • the printer now determines that the corresponding print image of another inking unit, indicated by dashed lines 3, is rotated or canted to the print image 1, ie to the zero position, so that corresponding markings 4 of the canted print image with the markings 2 of the correct one Print image no longer coincide, so he must take appropriate measures so that the marks 2.4 match again as soon as possible.
  • FIG. 1 also indicates that the tilting of the printed image 3 can be thought of as rotating this printed image about a point 5 in this example. The bright markings 4 thus mark the rotated position that needs to be corrected.
  • the plate cylinder with its printing plate rotates in the direction of arrow 6, so that the position DA thus marks the start of printing and the position DE the end of printing.
  • the printing plate In the starting position, in which the printer thus detects the misprint according to FIG. 1 on the basis of the printed sheet, the printing plate is clamped on the cylinder.
  • the misprint is now determined, as shown in FIG. 1.
  • the pressure plate In order to compensate for this misprint or the misregistration, the pressure plate is first relaxed. It should be explained that the pressure plate is clamped with its pressure start on a front clamping rail 7 and with its printing end on a rear clamping rail 8.
  • the pressure plate is tensioned when the false register is determined.
  • the setting process begins.
  • the rear tensioning rail in Fig. 2 is first to the left, ie direction arrow 9, moved. It then assumes the position indicated at item 8b.
  • FIG. 2 shows that for this purpose the front tensioning rail 7 assumes the position 7b rotated relative to the starting position.
  • the plate is stretched again.
  • stops cf. the rollers 20 in FIG. 3 which rest against the rear tensioning rail from the right in FIG. 2, thereby releasing the rear tensioning rail.
  • Springs 10 which bear against the tensioning rail 8 between a rear pit wall 11 and the rear tensioning rail, press the rear tensioning rail in FIG. 2 to the right into a tensioned position indicated at item 8d, as a result of which the plate is tensioned.
  • the tensioned end position of the tensioning rails 7, 8 need not be parallel to one another.
  • Springs are also arranged between the front pit wall and the front tensioning rail, which press the front tensioning rail in the direction of arrow 9 towards the center of the pit.
  • FIG. 3 A constructive solution for plate tensioning by hand is shown in FIG. 3.
  • springs 10 are also indicated between a rear pit wall 11 and the rear tensioning rail 8 and springs 12 between a front pit wall 33 and the front tensioning rail 7.
  • the rear tensioning rail 8 is moved parallel to itself. 3 shows a screw 14 to be actuated by hand, the rotation of which is transmitted via a gear 15 to the rotation of a threaded rod 16.
  • This has threaded sections 17 which mesh with worm wheels 18, with which levers 19 are fixedly connected, which carry the rollers 20 at their ends.
  • rollers rest on the inside of the rear tensioning rail 8.
  • the front tensioning rail 7, can be displaced separately at its two ends so that it can be tilted, as explained above with reference to FIG. 2.
  • gear mechanisms with the screws 14, the gears 15, the threaded rods 16 with the threaded sections 17, as explained above with respect to the rear tensioning rail are also provided for adjusting the front tensioning rail, but there at the right and left ends of the front tensioning rail.
  • the angle of rotation of the threaded rods 16 can also be detected via a potentiometer or the like for the purpose of displaying the angle of rotation.
  • the rotation of the threaded rods 16 brings about a corresponding adjustment of the front tensioning rail 7 via a lever mechanism (lever 19, roller 20) or also via an eccentric wheel 21.
  • the angle of rotation is suitably displayed separately on the right and left, for example on a digital display, which is preferably powered by a battery.
  • the plate cylinder which is tensioned at first, is relaxed by a parallel adjustment of the rear tensioning rail to the left in FIG. 3.
  • the front tensioning rail is then suitably tilted by suitably turning the two screws 14.
  • the stops 20 of the rear tensioning rail are moved back into the center of the pit, so that the rear springs 10 can push the rear tensioning rail into the tensioning position which it automatically assumes because the rear stops 20 are at a sufficient distance from the rear Comply with the tensioning rail.
  • Fig. 4 shows a constructive solution for a motorized adjustment of the rear clamping rail.
  • a motor-driven worm 31 is provided which, via a worm wheel 32, rotates a shaft 22 on which the tensioning lever 19 is firmly seated. This rests with its roller 20 at the rear end of the rear clamping rail 8.
  • the worm 31 can namely be turned by hand.
  • the rear tensioning rail is in several parts. It consists of an L-shaped base rail 25, on which the two-part clamping rail 8 in the axial direction here. H. 4, can slide in the direction perpendicular to the paper plane.
  • a pressure sensor can be provided on the tensioning lever 19 or on the roller 20 or also on the tensioning rail 8 for checking the positive connection between the roller and the tensioning rail 8 or base rail 25. This results in the stepping circuit for the drive motor which drives the worm 31.
  • FIG. 5 shows a constructive solution for the motorized adjustment of the front tensioning rail 7.
  • the worm 31 is rotated - by hand or by motor. It meshes with the worm wheel 32 of the shaft 22, whereby the eccentric wheel 21 is rotated, which causes the desired adjustment of the front tensioning rail 7 via a roller 24.
  • the plate cylinder 27 is also indicated.
  • a fine adjustment is sought here, corresponding, for example, to a travel of 3 mm with a rotation of 90 °.
  • 6 to 8 show a rubber guide which serves to compensate for the pivoting or tilting of the rear tensioning rail and at the same time for centering it.
  • a recess 28 extending in the circumferential direction is provided in the pit of the plate cylinder 27, into which the shaft of a guide screw 29 engages.
  • the screw is screwed to the rear tensioning rail or to the base rail 25 thereof.
  • a nut 30 is screwed onto its shaft, onto which in turn a cylindrical rubber body 34 is vulcanized.
  • Fig. 8 it is shown that the rubber body 34 rests on the right wall of the recess 28 and is pressed more strongly there. This corresponds to situation 8c in FIG. 2, where the rear tensioning rail 8 is shown tilted.
  • FIG. 9 Between the plate cylinder 27 and the pressure plate 35 there is preferably a film arrangement shown in FIG. 9 to reduce the friction between these parts, which according to claim 3 consists of at least two superimposed films 45, 46, each of which has a side that glides particularly well, ie which has a low coefficient of sliding friction. Both foils are in contact with one another with their surfaces with the low sliding friction coefficients and with their other surfaces, that is to say they have the higher sliding friction coefficients, on the top of the plate cylinder 27 or on the underside of the pressure plate 35. This causes the sliding friction between the plate cylinder and the pressure plate noticeably reduced.
  • the underside 47 of the lower film 45 has a greater roughness than its upper side 48
  • the upper side 49 of the upper film 46 has a greater roughness than the lower side 50 of the upper film 46.
  • the mutually facing and superimposed sides 48, 50 of the films 45, 46 slide well, while the opposite sides 47, 49 are noticeably rougher .
  • the surfaces 42, 44 of the cylinder 27 or the pressure plate 35 also have a tangible roughness.
  • the layers lie closely one above the other and the pressure plate 35 with the upper film 46 lying against it can easily shift relative to the plate cylinder 27 with the lower film 45 lying against it.
  • the rougher sides 47 and / or 49 are self-adhesive, so that at least one of the foils 45, 46 sticks to the plate cylinder or the printing plate.
  • the smoothly sliding sides 48, 50 are preferably achieved by a corresponding plastic coating of the foils 45, 46.
  • Additional foils or sheets can optionally be arranged between pages 42, 47 and / or 44, 49 if this should be necessary. It is therefore also possible to additionally arrange films with the properties according to the invention or also conventional films.
  • front and rear tensioning rails 7, 8 have center guides 51, as explained above with reference to FIGS. 6-8 with respect to the rear tensioning rail.
  • the center guide of the front tensioning rail does not require the rubber body 34.
  • the spring force of the front springs 12 is greater than that of the rear springs 10.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (6)

  1. Dispositif pour la correction de repérage par déplacement d'une plaque d'impression (35) sur un cylindre porte-plaque d'une machine d'impression, comportant un rail de serrage avant et un rail de serrage arrière (7,8) avec des éléments de serrage pour serrer la plaque d'impression (35) se trouvant à la périphérie du cylindre porte-plaque (27), à son début d'impression ou à sa fin d'impression, les rails de serrage (7,8) étant agencés dans un évidement s'étendant en direction axiale à la périphérie du cylindre porte-plaque (27), comportant une paroi avant et une paroi arrière (33,11) et, entre les deux rails de serrage (7,8), étant prévus des moyens pour régler les deux rails de serrage (7,8) contre une force élastique dans la direction périphérique du cylindre porte-plaque (27) vers le côté externe de l'évidement, de sorte que le rail de serrage arrière peut être réglé parallèlement à lui-même,
    caractérisé en ce que le rail de serrage avant (7) peut être réglé à ses deux extrémités de façon séparée en direction périphérique du cylindre porte-plaque (27).
  2. Dispositif selon la revendication 1,
    caractérisé en ce qu'au moins un capteur de pression est prévu, qui mesure la force entre le cylindre porte-plaque (27) et le rail de serrage arrière (8).
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que, entre le dessus du cylindre porte-plaque (27) et le dessous de la plaque d'impression (35), au moins deux feuilles (45,46) sont agencées, dont les surfaces (47,48,49,50) présentent, à chaque fois, des coefficients de glissement différents, les surfaces (48,50) ayant de bonnes propriétés de glissement étant disposées l'une sur l'autre.
  4. Dispositif selon la revendication 3,
    caractérisé en ce que les feuilles (45,46) sont recouvertes, d'un côté, d'une matière synthétique.
  5. Dispositif selon une des revendications 1 à 4,
    caractérisé en ce qu'un guide pour le rail de serrage arrière (8) dans sa direction de réglage (9) est prévu, qui permet, par l'intermédiaire d'un élément élastique en caoutchouc (34), également un déplacement du rail de serrage arrière (8) en direction axiale.
  6. Dispositif selon la revendication 5,
    caractérisé en ce que, dans le rail de serrage arrière (8), il est vissé une vis de guidage (29) dont la tige est guidée dans une cavité de guidage (28) dans l'évidement, un corps en caoutchouc (34) étant enfilé sur la tige de vis.
EP90120550A 1989-11-02 1990-10-26 Cylindre de plaque dans une machine d'impression Expired - Lifetime EP0426022B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936446 1989-11-02
DE3936446A DE3936446A1 (de) 1989-11-02 1989-11-02 Plattenzylinder einer druckmaschine

Publications (3)

Publication Number Publication Date
EP0426022A2 EP0426022A2 (fr) 1991-05-08
EP0426022A3 EP0426022A3 (en) 1991-09-18
EP0426022B1 true EP0426022B1 (fr) 1995-04-05

Family

ID=6392705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120550A Expired - Lifetime EP0426022B1 (fr) 1989-11-02 1990-10-26 Cylindre de plaque dans une machine d'impression

Country Status (6)

Country Link
US (1) US5097763A (fr)
EP (1) EP0426022B1 (fr)
JP (1) JP2539095B2 (fr)
AT (1) ATE120692T1 (fr)
DE (2) DE3936446A1 (fr)
ES (1) ES2070240T3 (fr)

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DE4226565A1 (de) * 1991-08-16 1993-02-18 Koenig & Bauer Ag Einrichtung zum spannen und justieren von biegsamen druckplatten auf plattenzylindern von rotationsdruckmaschinen
DE4129373C2 (de) * 1991-09-04 1995-05-18 Roland Man Druckmasch Vorrichtung zur Passerverstellung an einem Plattenzylinder einer Druckmaschine
US5317968A (en) * 1991-11-22 1994-06-07 Shinohara Machiner Co., Ltd. Plate cocking apparatus for sheet-fed printing press
GB2261848B (en) * 1991-11-26 1995-02-08 Shinohara Machinery Co Ltd Plate cocking apparatus for sheet-fed printing press
DE4205276A1 (de) * 1992-02-21 1993-08-26 Roland Man Druckmasch Vorrichtung zum aufspannen einer druckplatte auf einen plattenzylinder
DE4210897C1 (fr) * 1992-04-02 1993-08-12 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4226780C2 (de) * 1992-08-13 1994-12-01 Roland Man Druckmasch Vorrichtung zur Kontrolle der registergerechten Anlage einer Druckplatte auf dem Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen
JP2905652B2 (ja) * 1992-10-29 1999-06-14 株式会社桜井グラフィックシステムズ 印刷機の版くわえ装置
DE4238121C2 (de) * 1992-11-12 1996-01-11 Roland Man Druckmasch Vorrichtung zum Spannen von Druckplatten auf dem Plattenzylinder von Druckmaschinen
DE4304328C2 (de) * 1993-02-13 2003-01-30 Heidelberger Druckmasch Ag Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf einem Plattenzylinder einer Rotationsdruckmaschine
US5363564A (en) * 1993-04-22 1994-11-15 E. L. Harley Inc. Printing plate mounting and proofing machine and method for using same
DE4424930C2 (de) * 1994-07-14 1996-08-14 Koenig & Bauer Albert Ag Vorrichtung zum Befestigen von Aufzügen auf Druckzylindern
US5727749A (en) * 1996-02-05 1998-03-17 Presstek, Inc Automatic plate-loading cylinder with constant circumferential tension
DE19707063C1 (de) * 1997-02-22 1998-07-30 Roland Man Druckmasch Verfahren zur Durchführung von Seitenregisterkorrekturen sowie entsprechende Vorrichtung
US6131512A (en) * 1998-02-03 2000-10-17 Agfa-Gevaert, N.V. Printing master comprising strain gauges
DE10119407A1 (de) 2000-05-12 2001-11-15 Heidelberger Druckmasch Ag Vorrichtung zur Schrägkorrektur von Druckplatten auf dem Plattenzylinder einer Rotationsdruckmaschine
US6510793B1 (en) * 2001-06-28 2003-01-28 Eastman Kodak Company Imaging apparatus and printing plate mounting surface for use in an imaging apparatus having printing plate registration detection

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Also Published As

Publication number Publication date
DE59008843D1 (de) 1995-05-11
JPH03219954A (ja) 1991-09-27
ATE120692T1 (de) 1995-04-15
DE3936446C2 (fr) 1991-08-22
ES2070240T3 (es) 1995-06-01
EP0426022A2 (fr) 1991-05-08
EP0426022A3 (en) 1991-09-18
DE3936446A1 (de) 1991-05-08
US5097763A (en) 1992-03-24
JP2539095B2 (ja) 1996-10-02

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