EP2239140A1 - Offsetdruckmaschine - Google Patents

Offsetdruckmaschine Download PDF

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Publication number
EP2239140A1
EP2239140A1 EP09382047A EP09382047A EP2239140A1 EP 2239140 A1 EP2239140 A1 EP 2239140A1 EP 09382047 A EP09382047 A EP 09382047A EP 09382047 A EP09382047 A EP 09382047A EP 2239140 A1 EP2239140 A1 EP 2239140A1
Authority
EP
European Patent Office
Prior art keywords
roller
machine
centrer
accordance
cavity
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.)
Withdrawn
Application number
EP09382047A
Other languages
English (en)
French (fr)
Inventor
José Betés Peruga
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.)
ROTATEK SA
Original Assignee
ROTATEK SA
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 ROTATEK SA filed Critical ROTATEK SA
Priority to EP09382047A priority Critical patent/EP2239140A1/de
Publication of EP2239140A1 publication Critical patent/EP2239140A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/30—Bearings mounted on sliding supports
    • 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
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B41F13/40—Cylinder lifting or adjusting devices fluid-pressure operated

Definitions

  • Offset print machine of the type that comprises feed means, drive means, a chassis containing a first roller or plate a second roller or blanket and a third roller or counter roller (printing cylinder), with the first roller located above the second and the second above the third, characterised in that the first roller can be changed and its shaft is fixed with respect to the machine, the second roller can be changed and its shaft is movable with respect to the first roller guide shaft and the third roller is fixed and its shaft is mobile with respect to the first guide shaft, and because it comprises at least one support bracket on the exterior of the chassis, at least two guide elements fixed to the chassis, which cross and guide the referred support bracket, and a first centring device, per end and per roller, conical or truncated-cone shape, which is inserted inside a first cavity in the respective roller, thus centring and fixing each of the two referred rollers to the chassis.
  • Utility Model No 200601782 ( ES16065654 ), "CYLINDERS WITH BEARING RINGS FOR OFFSET PRINT MACHINES” from 2006 that refers to a roller with rolling rings for offset print machines of the type in which said machines comprise at least a first roller for the printing plate, a second transfer roller and a third print of counter roller, with said first and second rollers are hollow, through the interior of which passes a shaft belonging to the machine and characterised in that said hollow lightweight material rollers comprise rigid rolling rings located at the ends of the referred rollers with the same or notably greater diameter than the blanket or printing plate, taking said diameter from the roller shaft.
  • Patent US 7272342 also belongs to the state of the art, in the name of the Japanese company RICOH KK, which describes an image-forming apparatus, comprising a detachable cartridge and includes a photoconductive drum with one that has a minimum rotational-type of eccentricity.
  • This invention is an advance within the field of offset print machines.
  • this is a new machine in which the first roller is replaceable and its shaft is fixed with respect to the machine, the second roller is replaceable and its shaft is mobile with respect to the guide shaft of the first roller and the third roller is fixed and its shaft is mobile with respect to the first guide shaft.
  • centring system comprising a first centrer in the form of a cone or truncated cone preferably, located on the support shaft that is fixed to the bedplate and a second centrer located on a support bracket that moves in relation to the machine chassis.
  • Said cones or truncated cones of the centrers fit into the apertures in the roller, which they centre and fix in place.
  • the second centrer fits into the aperture in the first centrer.
  • the bracket incorporates guidance elements that permit its separation with respect to the chassis of the first and second centrers and thus facilitate the detachment of the rollers.
  • a hydraulic system permits simple, safe securing of the mobile rollers, the second and third, in a given position.
  • One objective of this invention is an offset print machine of the type comprising feed means, drive means, a chassis containing a first roller or plate, a second roller or blanket and a third roller or counter roller, with the first roller located above the second and the second above the third, characterised in that the first roller is replaceable and its shaft is fixed with respect to the machine, the second roller is replaceable and is fixed with respect to the first roller guide shaft and the third roller is fixed and its shaft is mobile with respect to the first shaft guide roller and because it comprises at least one support bracket on the outside of the chassis, at least two guidance elements, fixed to the chassis, that pass through and guide the referred support bracket and a first centrer, per end and per roller, conical or truncated cone shape, which is inserted inside a first cavity in the respective roller, centring and fixing in place each of the two referred rollers to the chassis.
  • Figure 6 shows the chassis 4, bracket 5, the guidance shafts 21 and 22, the third roller 3 and a mobile bedplate 31.
  • the first 1 and second 2 rollers are arranged inside the machines, which are also called the plate and blanket respectively, in order for them to rotate on shafts 21, 22.
  • said rollers 1, 2 are replaceable or detachable.
  • first roller 1 is fixed with respect to the machine, in other words, it always maintains the same position and, on the other hand, the other two rollers, the second 2 and the third 3 are mobile in relation to first roller 1, in other words, they move towards and away from each other in order to adapt the various paper or material formats that pass between them to be printed.
  • bracket 5, 15 (two are illustrated in this embodiment) approach the corresponding roller 1, 2 by means of the guidance elements 6, which are two in this embodiment (however, the number may vary without affecting the aim of the invention), which are fixed to chassis 4 and pass though bracket 5, 15 so that the bracket moves along said shafts 6.
  • first centrer 7 When it has approached sufficiently, it turns screw 13, which fits first centrer 7, with a conical or truncated cone form, inside first cavity 8, which also has the same form as first centrer 7, as if it were a mould, in this case, arranging the larger cone or truncated cone base in the exterior aperture of first cavity 8.
  • the same centrer 7 facilitates the fitting and the fixing and at the same time, of screw 13, which passes through first centrer 7 and screws onto second centrer 10, allowing it to be blocked.
  • second centring mechanism comprising second centrer 10, located inside first cavity 8 and second cavity 9 in the first centrer so that when first centrer 7 is fitted inside first cavity 8, second centrer 10 is also fitted inside second cavity 9 producing correct centring and leaving double-cone centring.
  • Screw 13 complies with a triple function, on the one hand, screwed, it forms a support for the respective roller and, on the other, it applies force to centrers 7 and lastly, it works as a tensioning element.
  • Rollers 1, 2 ( Figure 4 ) comprises rolling rings 11, 12, which are located at the roller ends. As shown in same Figure 4 , said roller rings 11, 12 are facing each other, two by two, in other words, those of the upper cylinder over the lower ones.
  • the initial contact pressure between rolling rings 11, 12 is determined. This is achieved through movement of second roller 2, which is moveable or mobile, since first roller 1 is fixed with respect to the machine.
  • First roller 1 or plate, which is replaceable, is mounted on guide roller 21 secured to chassis 4.
  • the second roller or blanket carrier which is mounted on guide shaft 22, is fixed at one end to mobile bedplate 31 and the other end is secured to another bedplate on guides containing bracket 15 and centrer 7.
  • Third roller 3 which is fixed, is similarly mounted on two mobile bedplates on guides.
  • the mobile bedplates are driven by a hydraulic system and synchronised by a mechanical system comprising a shaft with pinions on racks that maintain an adjustable pressure and maintain their respective positions immobile during operation, supporting the rolling tracks that incorporate each of the two rollers between them.
  • rollers have the following technical specifications:
  • third roller 3 is arranged between rolling rings 11, 12 of second roller 2, because the second roller 2 is narrower than its rolling rings and third roller 3 is as wide as roller 2 rolling rings.
  • the product to be printed, paper, for example, would remain between second roller 2, or blanket and third roller 3 or counter roller.
  • the inventor applies at least an additional 20% of the initial contact pressure, at least on the first 1 and second 2 rollers.
  • the amounts can vary upwards depending on the type of paper and irregularities etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP09382047A 2009-04-07 2009-04-07 Offsetdruckmaschine Withdrawn EP2239140A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09382047A EP2239140A1 (de) 2009-04-07 2009-04-07 Offsetdruckmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09382047A EP2239140A1 (de) 2009-04-07 2009-04-07 Offsetdruckmaschine

Publications (1)

Publication Number Publication Date
EP2239140A1 true EP2239140A1 (de) 2010-10-13

Family

ID=40957714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09382047A Withdrawn EP2239140A1 (de) 2009-04-07 2009-04-07 Offsetdruckmaschine

Country Status (1)

Country Link
EP (1) EP2239140A1 (de)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036835A (en) * 1933-12-08 1936-04-07 Miehle Printing Press & Mfg Transfer method and means
GB661854A (en) * 1946-07-11 1951-11-28 Julien Dungler Improvements in machines for printing fabrics, paper and other materials
JPS6135704U (ja) * 1984-08-07 1986-03-05 凸版印刷株式会社 シリンダ−取付用のセンタ−コ−ン
GB2329151A (en) * 1997-09-12 1999-03-17 Roland Man Druckmasch Rotary press with accessible cylinder ends
DE19848184A1 (de) * 1998-10-20 2000-05-04 Roland Man Druckmasch Zylinder einer Rotationsdruckmaschine
GB2359517A (en) * 2000-02-23 2001-08-29 Roland Man Druckmasch Rotary printing machine
WO2004110761A1 (de) * 2003-06-17 2004-12-23 Koenig & Bauer Aktiengesellschaft Druckeinheiten mit schmitzringen in einer rotationsdruckmaschine
US20070107612A1 (en) * 2005-11-16 2007-05-17 Man Roland Druckmaschinen Ag Cylinder of a printing press and bearing arrangements for it
US7272342B2 (en) 2003-06-30 2007-09-18 Ricoh Co., Ltd. Image forming apparatus having a detachable cartridge including a photoconductive drum with axis shaft having a minimal rotational eccentricity, and a method of assembling the image forming apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036835A (en) * 1933-12-08 1936-04-07 Miehle Printing Press & Mfg Transfer method and means
GB661854A (en) * 1946-07-11 1951-11-28 Julien Dungler Improvements in machines for printing fabrics, paper and other materials
JPS6135704U (ja) * 1984-08-07 1986-03-05 凸版印刷株式会社 シリンダ−取付用のセンタ−コ−ン
GB2329151A (en) * 1997-09-12 1999-03-17 Roland Man Druckmasch Rotary press with accessible cylinder ends
DE19848184A1 (de) * 1998-10-20 2000-05-04 Roland Man Druckmasch Zylinder einer Rotationsdruckmaschine
GB2359517A (en) * 2000-02-23 2001-08-29 Roland Man Druckmasch Rotary printing machine
WO2004110761A1 (de) * 2003-06-17 2004-12-23 Koenig & Bauer Aktiengesellschaft Druckeinheiten mit schmitzringen in einer rotationsdruckmaschine
US7272342B2 (en) 2003-06-30 2007-09-18 Ricoh Co., Ltd. Image forming apparatus having a detachable cartridge including a photoconductive drum with axis shaft having a minimal rotational eccentricity, and a method of assembling the image forming apparatus
US20070107612A1 (en) * 2005-11-16 2007-05-17 Man Roland Druckmaschinen Ag Cylinder of a printing press and bearing arrangements for it

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