EP0195280B1 - Vorrichtung zum Einspannen und Ausrichten von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen - Google Patents

Vorrichtung zum Einspannen und Ausrichten von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen Download PDF

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Publication number
EP0195280B1
EP0195280B1 EP86102500A EP86102500A EP0195280B1 EP 0195280 B1 EP0195280 B1 EP 0195280B1 EP 86102500 A EP86102500 A EP 86102500A EP 86102500 A EP86102500 A EP 86102500A EP 0195280 B1 EP0195280 B1 EP 0195280B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
screws
rail
plate
tensioning rail
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
EP86102500A
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German (de)
English (en)
French (fr)
Other versions
EP0195280A3 (en
EP0195280A2 (de
Inventor
Willi Jeschke
Nikolaus Dr. Spiegel
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0195280A2 publication Critical patent/EP0195280A2/de
Publication of EP0195280A3 publication Critical patent/EP0195280A3/de
Application granted granted Critical
Publication of EP0195280B1 publication Critical patent/EP0195280B1/de
Anticipated expiration legal-status Critical
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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

Definitions

  • the invention relates to a device for clamping and aligning flexible printing plates according to the preamble of claim 1.
  • Such devices are known (DE-GM 8435189) and are used to place the printing plate to be clamped onto the plate cylinder as precisely as possible in order to avoid a subsequent correction.
  • the tensioning rail can be aligned in a certain position at the start of the pressure using adjusting screws.
  • means can also be provided on the printing plate itself, which facilitate the precise alignment of the printing plate. If this does not succeed, the applied pressure plate must be corrected, which as a rule leads to plastic deformations of the same due to the wrap friction. These deformations in turn result in registration errors that are difficult to correct.
  • the object is achieved with the characterizing features of claim 1.
  • the preload achieved using an additional force makes it possible to switch off the play in the adjusting means, the additional force being chosen so high that the one-sided contact of the clamping means does not change even when a new pressure plate is inserted.
  • the tension springs designed as leaf springs are designed and attached in such a way that no bending moments but only tensile forces act on the tensioning rail.
  • Another advantage is that the leaf springs arranged as close as possible to the pressure plate do not hinder the necessary tensioning of the same.
  • the additional set screws according to claim 3 allow a precise setting of the desired starting position. This means that the pressure plate can be retightened at any time without losing the target position determined by the set screws. This target position of the tensioning rail can be found again at any time by simply loosening the tensioning screws.
  • the clamped pressure plate can be inserted into the machine so precisely that the possibly necessary register corrections take place in the elastic range of the pressure plate due to the precise alignment and position determination of the front tensioning rail.
  • the printing unit shown in FIG. 1 contains in a known manner a plate cylinder 1, a rubber cylinder 2 and a printing cylinder 3, which are mounted on both sides in machine side frames 4.
  • the plate cylinder 1 is assigned a dampening unit 5 and an inking unit 6, which are also mounted on both sides in the machine side frames 4.
  • the plate cylinder 1 has a channel 7, which runs axially parallel, in which a front clamping rail 8 and a rear clamping rail 9 are arranged. For clamping and aligning a new pressure plate 10, this is inserted into the front clamping rail 8 approximately in the position shown, whereby it loads the front clamping rail 8 - at least with its own weight.
  • FIG. 2 is shown how the front end 11 of the pressure plate 10 between the instep rail 8 and cover rail 12 is clamped with the help of a tension rod 13.
  • Such tensioning screws are also provided in the rear tensioning rail 9.
  • Both clamping rails 8 and 9 are guided in the circumferential direction of the plate cylinder 1 in guides 16 which are fixed to the bottom of the channel 6.
  • the front tensioning rail 8 is shown exaggeratedly tilted relative to the bottom of the channel 7 to show that when the pressure plate runs in between the plate cylinder 1 and the blanket cylinder 2, which is done by rotating the two cylinders in the direction of the arrow, tensile forces act on the front end 11 of the pressure plate that lead to the shown tipping phenomenon in the context of the game.
  • FIG. 4 the pressure plate 10 corresponding to FIG. 1 is only inserted, which in the previously known designs led to the tilting movement in the opposite direction, as is exaggeratedly shown here.
  • a leaf spring 17 is screwed on the front tensioning rail 8 in a manner that prevents it from rotating.
  • the leaf spring 17 is provided directly under the pressure plate 10 and is suspended under prestress in stops 19 screwed onto the channel wall. It exerts a tensile force on the front clamping rail 8, so that it always remains in the tilt position shown in FIG. 3 even when a new pressure plate is inserted, as a result of which the play between the clamping rail 8 and the guide 16 and in the other clamping means is excluded.
  • two set screws 20 are provided, which are fixed via lock nuts 21. Via these adjusting screws 20, the tensioning rail 8 can be aligned in a specific starting position or setpoint position, so that this specific setpoint position can always be assumed after a clamping process.
  • the set screws 20 are arranged at the same height as the clamping screws 14 in order to ensure the same tipping point of the clamping rail 8.
  • the contact surfaces of the adjusting and clamping screws are spherical and are hereby supported on the stops 15 and 19.
  • a plate spring can be provided between lock nut 21 and tensioning rail 8.
  • compression springs 22 can be provided between the two tensioning rails 8 and 9 in order to prevent undesired displacement of the tensioning rail 9 in the guides 16. These compression springs also support the insertion of the rear end of the pressure plate 10 between the tensioning rail 9 and the cover rail 12.
  • the pressure plate 10 can be with its front end 11 in the clamping rail 8, e.g. with the help of dowel bolts u. The like., Insert and align so precisely that a possibly necessary register fine correction takes place at the end of the pressure plate via the tensioning rail 9 in the elastic region of the pressure plate.
  • the required stable starting position of the front clamping rail 8 is generated by the leaf springs 17.
  • other types of springs can also be used instead of leaf springs.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP86102500A 1985-03-22 1986-02-26 Vorrichtung zum Einspannen und Ausrichten von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen Expired - Lifetime EP0195280B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3510440 1985-03-22
DE19853510440 DE3510440A1 (de) 1985-03-22 1985-03-22 Vorrichtung zum einspannen und ausrichten von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen

Publications (3)

Publication Number Publication Date
EP0195280A2 EP0195280A2 (de) 1986-09-24
EP0195280A3 EP0195280A3 (en) 1987-06-16
EP0195280B1 true EP0195280B1 (de) 1990-04-25

Family

ID=6266055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102500A Expired - Lifetime EP0195280B1 (de) 1985-03-22 1986-02-26 Vorrichtung zum Einspannen und Ausrichten von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen

Country Status (4)

Country Link
US (1) US4724762A (enrdf_load_stackoverflow)
EP (1) EP0195280B1 (enrdf_load_stackoverflow)
JP (1) JPS61220848A (enrdf_load_stackoverflow)
DE (1) DE3510440A1 (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519869A1 (de) * 1985-06-03 1986-12-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Spannschiene am plattenzylinder von rotationsdruckmaschinen
DE3806526A1 (de) * 1988-03-01 1989-09-14 Heidelberger Druckmasch Ag Vorrichtung zum spannen von biegsamen druckplatten am plattenzylinder von rotationsdruckmaschinen
DE3933678A1 (de) * 1989-10-09 1991-04-18 Miller Johannisberg Druckmasch Vorrichtung zum positionsgenauen spannen einer druckplatte auf einem druckzylinder
DE3936446A1 (de) * 1989-11-02 1991-05-08 Miller Johannisberg Druckmasch Plattenzylinder einer druckmaschine
US5012738A (en) * 1989-11-13 1991-05-07 Hercules, Incorporated Printing plate locking device
US5159877A (en) * 1991-12-10 1992-11-03 Ag-Bag Corporation Rotor arrangement for a bagging machine
GR960100252A (el) * 1996-07-17 1998-03-31 Μπαρες τσιγκων εκτυπωτικων μηχανων οσφετ για την ταχεια και σωστη τοποθετηση του τσιγκου επι του κυλινδρου (καζανι).
CZ297967B6 (cs) * 2000-08-25 2007-05-09 Heidelberger Druckmaschienen Ag Zarízení na prestavování minimálne jednoho prvku registru v tiskovém stroji a zpusob k provádení takového prestavování
US6886312B1 (en) 2003-11-07 2005-05-03 Miller-St. Nazianz, Inc. Compacting rotor for bagging machines
US8281716B2 (en) 2008-12-24 2012-10-09 Printing Research, Inc. Anti-marking jackets comprised of fluoropolymer and methods of using in offset printing
US8578853B2 (en) * 2008-12-24 2013-11-12 Printing Research, Inc. Anti-marking jackets comprised of attachment structure and methods of using in offset printing
US8424453B2 (en) * 2010-09-01 2013-04-23 Printing Research, Inc. Apparatus and method for adjusting anti-marking jackets
US8677899B2 (en) 2011-01-31 2014-03-25 Printing Research, Inc. Reversible anti-marking jackets and methods of using
US9346258B2 (en) 2012-05-02 2016-05-24 Printing Research, Inc. Method for cleaning anti-marking jackets

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8435189U1 (de) * 1985-02-28 Grapho Metronic Meß- und Regeltechnik GmbH & Co KG, 8000 München Vorrichtung zum Einspannen und Justieren von Druckplatten auf den Plattenzylindern einer Druckmaschine
US1765530A (en) * 1927-10-22 1930-06-24 Harris Seybold Potter Co Plate clamp
GB448069A (en) * 1935-08-19 1936-06-02 Multigraph Co Improvements in or relating to printing machines
DE946901C (de) * 1942-11-26 1956-08-09 Steinmesse & Stollberg K G Schnellklemmvorrichtung fuer biegsame Druckplatten
US2641183A (en) * 1948-07-24 1953-06-09 Fairchild Camera Instr Co Image-reproducing plate and cylinder assembly
US3168040A (en) * 1962-07-18 1965-02-02 Harris Intertype Corp Plate clamp registering mechanism
FR1575155A (enrdf_load_stackoverflow) * 1967-07-29 1969-07-18
DE2060001C3 (de) * 1970-12-05 1975-08-28 Koenig & Bauer Ag, 8700 Wuerzburg Klemm- und Spannvorrichtung fur biegsame Druckplatten
US3884147A (en) * 1972-05-26 1975-05-20 Roland Offsetmaschf Device for fastening flexible printing plates
US3858512A (en) * 1973-03-22 1975-01-07 Roland Offsetmaschf Lock-up mechanism for flexible printing plates providing improved reference adjustment
DE2754080C3 (de) * 1977-12-05 1982-01-07 Registersystem für die Drucktechnik GmbH, 8000 München Vorrichtung zum registerhaltigen Spannen von Druckplatten auf dem Plattenzylinder von Druckmaschinen
US4347788A (en) * 1980-05-01 1982-09-07 Harris Corporation Plate lockup mechanism
JPS57205152A (en) * 1981-06-13 1982-12-16 Komori Printing Mach Co Ltd Color register adjusting device for sheet printer
CH653616A5 (fr) * 1983-07-26 1986-01-15 De La Rue Giori Sa Procede de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques et dispositif de mise en oeuvre.
DE8412886U1 (de) * 1984-04-26 1984-07-19 Zimmerer, Alois, 8000 München Offset-druckzylinder mit druckplatte
DE3505678A1 (de) * 1985-02-19 1986-08-21 Rolf Dr.-Ing. 8011 Neukeferloh Bosse Einrichtesystem fuer offsetdruckmaschinen

Also Published As

Publication number Publication date
DE3510440C2 (enrdf_load_stackoverflow) 1992-04-16
JPS61220848A (ja) 1986-10-01
EP0195280A3 (en) 1987-06-16
EP0195280A2 (de) 1986-09-24
US4724762A (en) 1988-02-16
DE3510440A1 (de) 1986-09-25

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