EP0687562A2 - Méthode et appareil pour le montage de plaques d'impression flexibles - Google Patents

Méthode et appareil pour le montage de plaques d'impression flexibles Download PDF

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Publication number
EP0687562A2
EP0687562A2 EP95107166A EP95107166A EP0687562A2 EP 0687562 A2 EP0687562 A2 EP 0687562A2 EP 95107166 A EP95107166 A EP 95107166A EP 95107166 A EP95107166 A EP 95107166A EP 0687562 A2 EP0687562 A2 EP 0687562A2
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
forme cylinder
exerted
tensile force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95107166A
Other languages
German (de)
English (en)
Other versions
EP0687562A3 (fr
EP0687562B1 (fr
Inventor
Ulrich Dr. Jung
Manfred Herold
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 EP0687562A2 publication Critical patent/EP0687562A2/fr
Publication of EP0687562A3 publication Critical patent/EP0687562A3/fr
Application granted granted Critical
Publication of EP0687562B1 publication Critical patent/EP0687562B1/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
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the invention relates to a method and a device for mounting flexible printing forms on the forme cylinder of printing machines according to the preamble of the method and device claim.
  • a pressure roller for mounting printing forms on the forme cylinder of printing machines is known, which is mounted on and off relative to the forme cylinder.
  • the printing plate attached to the forme cylinder with the front edge is ironed on the forme cylinder by rotating the forme cylinder and the pressure roller that extends over the width of the printing form.
  • the pressure of the pressure roller in connection with its elastic surface (rubber) thus creates a tensile force acting on the printing form in the circumferential direction of the forme cylinder.
  • the device described above can largely be used without problems with offset printing plates.
  • the problem is the use of pressure rollers known per se in printing formes, which have to be mounted on the form cylinders of printing units that work on the high-pressure principle.
  • the printing form then has different strengths depending on the proportion of printing and non-printing points. It is therefore not possible to properly mount such printing forms with a pressure roller that extends over the format width of the forme cylinder, since the pressure roller only presses the printing form on its printing surface raised areas presses against the forme cylinder.
  • Such printing forms are used in particular in coating devices in offset printing machines and are then referred to as coating plates.
  • so-called Nyloflex plates are also known, in which a flexo plate is applied to an aluminum support in the manner of an offset printing plate. Even then, the painting device works according to the high-pressure or flexographic printing process.
  • the object of the present invention is therefore to develop a method and a device in accordance with the preamble of the respective claim in such a way that flexible printing forms can be optimally mounted on the forme cylinder independently of different thicknesses or other subject-specific characteristics.
  • the printing form is not pressed against the form cylinder over the entire format width, but that a tensile force directed outwards in the circumferential direction as well as in the axial direction of the form cylinder is exerted on the form edges of the form form for full opening.
  • This has the advantage that only a relatively narrow pressure roller has to be provided at the format edges of the printing form, which exerts the desired spreading effect (tensile force in both the circumferential and axial directions) on the printing form.
  • the application of the invention is not limited to printing forms which are used in the case of the high-pressure or flexographic printing process Painting equipment or the like can be used. According to the principle of the invention, printing forms for planographic printing machines can of course also be mounted on the forme cylinder. The printing plates of a sheetfed offset printing machine are mentioned here as an example.
  • Fig. 1 shows a forme cylinder 1, around the outer periphery of a printing form 2 is partially drawn.
  • the printing form 2 was fastened with its front edge to a clamping device in the pit of the forme cylinder 1.
  • the mounting of the printing form 2 is done by rotating the forme cylinder 1 in the direction of the arrow shown, ie in the direction of the printing operation.
  • FIG. 1 there is also a pressure roller 3 which can be attached to the forme cylinder 1 and which can be shut down with respect to the latter.
  • the pressure roller 3 is not designed as a continuous roller or the like, but according to the invention two are acting on the left and right format edge of the printing form 2 Pressure rollers provided.
  • FIG. 2 shows its view of the forme cylinder 1 with the printing form 2 partially drawn around it.
  • the downward-pointing arrow shows the direction of rotation of the form cylinder 1 when the printing form 2 is pulled up.
  • a circumferential force FU directed in the circumferential direction of the forme cylinder 1 and an axial tensile force FA due to the outside of the printing form 2 act on the left and right edge regions 4 of the printing form 2.
  • a respective tensile force FR directed to the top left and top right which is opposite to the direction in which the printing forme 2 is pulled open.
  • the effect of one of the resulting tensile forces FR exerted on the two edge regions 4 of the printing form 2 is such that the printing form 2 is also clamped onto the surface of the forme cylinder 1 in the axial direction.
  • this type of exertion of tensile forces on the printing form 2 it is therefore not necessary to press the printing form 2 against the form cylinder 1 even in the central region thereof, which are located between the edge regions 4, that is to say where the printing subject is arranged.
  • the resulting tensile forces FR in the left and right edge region 4 of the printing form 2 produce a sufficient spreading effect.
  • FIG. 3 shows a simple embodiment according to the invention in order to allow the resulting tensile forces FR described above to act on the left and right edge region 4 of the printing form 2.
  • a part of the printing form 2 is shown with the left edge area 4 according to FIG. 2.
  • the pressure roller 3 assigned to the left edge area 4 of the printing form 2 is skewed with its axis relative to the axis of the forme cylinder 1, the axis of the Forme cylinder is marked with A.
  • the mounting and mounting of the pressure roller 3 with respect to the forme cylinder 1 cannot be shown.
  • Such bearings are known per se and therefore do not require any further explanation.
  • the right edge region 4 of the printing form 2 is likewise assigned a pressure roller 3 in mirror image (not shown).
  • Fig. 4 shows a section through a so-called Nyloflex plate, which can be used in painting devices that work according to the high-pressure or flexographic printing process.
  • a cliché 6 is applied in accordance with the printing or non-printing subject, which has a defined thickness at the printing locations and corresponding recesses in the non-printing locations.
  • the left edge region 4 is also shown in this printing form 2.
  • the printing form 2 is chosen in its format such that the left and right strip-shaped edge area 4 is not inked and therefore does not print.
  • the edge area 4 of the same thickness as the cliché 6 is also formed in the printing area.
  • the edge regions 4 serve only for the interaction of the pressure rollers 3 according to the invention for mounting the printing form 2.
  • conically shaped pressure rollers can of course also be used to produce the spreading effect according to the invention.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
EP95107166A 1994-06-16 1995-05-11 Méthode et appareil pour le montage de plaques d'impression flexibles Expired - Lifetime EP0687562B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4420971 1994-06-16
DE4420971A DE4420971C1 (de) 1994-06-16 1994-06-16 Verfahren und Vorrichtung zum Aufziehen flexibler Druckformen

Publications (3)

Publication Number Publication Date
EP0687562A2 true EP0687562A2 (fr) 1995-12-20
EP0687562A3 EP0687562A3 (fr) 1996-11-13
EP0687562B1 EP0687562B1 (fr) 1999-01-27

Family

ID=6520687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107166A Expired - Lifetime EP0687562B1 (fr) 1994-06-16 1995-05-11 Méthode et appareil pour le montage de plaques d'impression flexibles

Country Status (3)

Country Link
EP (1) EP0687562B1 (fr)
AT (1) ATE176199T1 (fr)
DE (2) DE4420971C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511075A1 (de) * 1995-03-25 1996-09-26 Roland Man Druckmasch Verfahren und Vorrichtung zum Aufziehen flexibler Druckformen
EP2535188B1 (fr) * 2011-06-17 2013-12-25 Lehner GmbH Dispositif de montage, imprimante et procédé d'application d'une forme d'impression sur un support d'une forme d'impression

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214207C1 (fr) 1992-04-30 1993-07-22 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461376A (en) * 1947-05-28 1949-02-08 Blaw Knox Co Sheet stretching mechanism
US4470589A (en) * 1982-09-30 1984-09-11 Karl Singer Method and apparatus for feeding and laminating sheets
US5070785A (en) * 1989-06-14 1991-12-10 De La Rue Giori S.A. Device for tensioning printing plates mounted on a cylinder of an intaglio printing machine
DE4218602C2 (de) * 1991-08-28 1993-11-11 Heidelberger Druckmasch Ag Vorrichtung zum Einführen der Druckplattenhinterkante an einem Plattenzylinder
DE4130805C2 (de) * 1991-09-17 1994-01-27 Koenig & Bauer Ag Einrichtung an einem Zylinder für Bogenrotationsdruckmaschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214207C1 (fr) 1992-04-30 1993-07-22 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Also Published As

Publication number Publication date
DE59504955D1 (de) 1999-03-11
EP0687562A3 (fr) 1996-11-13
EP0687562B1 (fr) 1999-01-27
ATE176199T1 (de) 1999-02-15
DE4420971C1 (de) 1995-07-20

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