EP1400356B1 - Ensemble comprenant une unité de blanchet et un cylindre à dispositif de fixation de blanchet, cylindre, unité de blanchet et presse offset correspondants - Google Patents

Ensemble comprenant une unité de blanchet et un cylindre à dispositif de fixation de blanchet, cylindre, unité de blanchet et presse offset correspondants Download PDF

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Publication number
EP1400356B1
EP1400356B1 EP03292193A EP03292193A EP1400356B1 EP 1400356 B1 EP1400356 B1 EP 1400356B1 EP 03292193 A EP03292193 A EP 03292193A EP 03292193 A EP03292193 A EP 03292193A EP 1400356 B1 EP1400356 B1 EP 1400356B1
Authority
EP
European Patent Office
Prior art keywords
blanket
support plate
cylinder
slot
edge
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
EP03292193A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1400356A3 (fr
EP1400356A2 (fr
Inventor
Etienne Tezenas Du Montcel
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.)
Goss International France SAS
Original Assignee
Goss Systemes Graphiques Nantes SAS
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 Goss Systemes Graphiques Nantes SAS filed Critical Goss Systemes Graphiques Nantes SAS
Publication of EP1400356A2 publication Critical patent/EP1400356A2/fr
Publication of EP1400356A3 publication Critical patent/EP1400356A3/fr
Application granted granted Critical
Publication of EP1400356B1 publication Critical patent/EP1400356B1/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
    • B41F27/1243—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 pivotal or swivelling motion, e.g. by means of a rocking lever
    • 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
    • B41F27/125—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 on a curvilinear path, e.g. by winding on a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the present invention relates to an offset press assembly according to the preamble of claim 1.
  • Such a press conventionally comprises, in addition to the blanket cylinder and the blanket, a plate cylinder and a plate, and a pressure cylinder.
  • the plate carried by the plate cylinder is moistened and then inked.
  • the plate decals the ink from its printer regions on the blanket carried by the blanket cylinder.
  • the blanket then decodes the ink onto the printing paper that passes between the blanket cylinder and the pressure cylinder.
  • FR-2,573,347 has proposed an assembly according to the preamble of claim 1.
  • the front edge of the blanket covers the entire front edge of the support plate and thus enters the slot of the cylinder.
  • the rear edge of the blanket does not penetrate into the slot and is applied substantially against the front fold region of the blanket unit.
  • the gap between the beginning of the blanket and the end of the blanket is extremely narrow in order to limit the vibrations resulting from the presence of the slot in the cylinder.
  • FR-2 733 719 has proposed another solution in which the device for fixing the blanket unit comprises pressure pads which come to apply the front and rear edges of the support plate against the front wall of the slot. These front and rear edges of the support plate are not coated by the blanket. The forces exerted by the studs are exclusively perpendicular to the front and rear edges of the support plate.
  • the fixing device described does not absorb the deformations of the blanket unit resulting from the operation of the offset press.
  • the dilations of the support plate can not be absorbed so that breaks are observed in the vicinity of its rear fold.
  • US-2002/0 078 846 discloses an assembly comprising a blanket unit and a cylinder provided with a device for fastening the blanket unit.
  • the rear edge of the blanket unit support plate has no opening. It is folded to cooperate with a blade of the fixing device, which does not exert a traction force substantially parallel to the rear edge.
  • DE-100 60 171 discloses another blanket attachment device and US-6 561 094 is concerned with the fixing of a printing plate.
  • An object of the invention is to provide an assembly according to the preamble of claim 1 and which allows to extend and fix the blanket unit on the cylinder in a satisfactory manner, and which is simple and economical to achieve.
  • the subject of the invention is an assembly according to claim 1.
  • the set may comprise one or more dependent claims 2 to 7.
  • FIG. 1 schematically illustrates an assembly 1 for an offset press which comprises a cylinder 2 and a blanket unit 3 surrounding the peripheral surface 4 of the cylinder 2 and carried by the cylinder 2.
  • the cylinder 2 extends along a longitudinal axis A and its longitudinal ends 5, only one of which is visible in FIG. 1, are intended to be received in bearings of the frame of an offset press.
  • the cylinder 2 can, thanks to conventional drive means not shown, rotate about its longitudinal axis A in a direction illustrated by the arrow 6 in Figure 1.
  • a longitudinal recess 8 has been formed in the cylinder 2 from its peripheral surface 4.
  • This recess 8 has substantially a rectangular trapezoidal section with a rounded side corresponding to a portion of the peripheral surface 4 of the cylinder 2.
  • This insert 10 defines inside the cylinder 2 a longitudinal cavity 12 of substantially rectangular section and a longitudinal slot 14 of substantially triangular section.
  • the slot 14 opens into the peripheral surface 4 of the cylinder 2 and into the cavity 12.
  • the front wall 16 is connected to the peripheral surface 4 by a chamfer 18, for example approximately 1 mm.
  • This chamfer 22 has for example a width of about 1.4 mm.
  • the front walls 16 and rear 20 of the slot 14 diverge towards the cavity 12, that is to say from the upstream to the downstream of the slot 14.
  • the walls 16 and 20 thus form between them an angle typically ⁇ about 14.8 °. More generally, this angle ⁇ will be less than 20 °.
  • the upstream width of the slot 14 between the walls 16 and 20, that is to say downstream of the chamfers 18 and 22, is about 1 mm. More generally, this width l will be less than 1.5 mm and preferably less than 1.1 mm.
  • the cylinder 2 comprises a device 26 for fixing the blanket unit 3 to the cylinder 2.
  • This device 26 is housed in the cavity 12 and comprises a pin 28 extending along an axis XX substantially parallel to the axis A of the cylinder 2. This pin 28 extends for example all along the cylinder 2.
  • hooks 30 and support elements 32 are distributed along pin 28.
  • the hooks 30 are formed by elastic blades whose free ends 34 are bent opposite the slot 14.
  • the support elements 32 are formed by resilient blades whose free ends 36 are folded at 180 °.
  • the hooks 30 and the support elements 32 are associated in pairs, the hook 30 and the support member 32 being attached by a common screw 38 to the pin 28.
  • the support element 32 is disposed of top of the hook 30 associated.
  • the hook pairs 30 / support member 32 are spaced longitudinally from each other and distributed along the pin 28.
  • the pin 28 is rotatably mounted about its longitudinal axis X-X in the cavity 12, for example by means of bearings provided at the ends of the pin 28 and optionally in intermediate regions thereof.
  • the pin 28 is thus movable between two positions illustrated respectively by FIGS. 2 and 6.
  • the rod 46 is articulated by a first of its ends to the block 52.
  • the rod 46 is mounted at its other end in the support 44 by means of a hinge allowing it to pivot in a plane orthogonal to the axis A of the cylinder 2.
  • the spring 50 takes first support on the block 44 and also on the flange 48.
  • the rod 46 can move relative to the support 44 between two stable end positions.
  • the first stable end position is shown in FIG. 1. This position corresponds to the release position of the spindle 28 illustrated in FIG. 1.
  • the second stable end position is shown in FIG. 7.
  • the spindle 28 is in its fixing position illustrated in FIG.
  • the rod 46 will then pass through an unstable neutral position where its axis will cut the axis XX of the pin 28.
  • the spring 50 is then compressed so that it will push the rod 46 to its second stable position, c That is to say that of FIG. 7.
  • the block 52 is then bearing against an adjustable stop 58 which makes it possible to adjust the angular position of the pin 28 in its fixing position.
  • the mechanism 42 crossing neutral is used to manually move the pin 28 from its release position to its fixing position and vice versa. Note, however, that any other type of drive mechanism 42 may be used.
  • the blanket unit 3 comprises a support plate 62 and a blanket 64 fixed on the support plate 62.
  • the support plate 62 is for example made of stainless steel. Its thickness is about 0.2mm.
  • the blanket 64 comprises for example conventionally several layers of elastomer and fabric.
  • the blanket 64 is fixed to the support plate 62 by gluing or vulcanization.
  • the leading edge 66 of the backing plate 62 extends beyond the leading edge 68 of the blanket 64.
  • the leading edge 66 of the backing plate 62 is folded at a forward fold 70 to form with the remainder of the blank. the plate 62 an acute angle ⁇ .
  • the front edge 68 of the blanket 64 is slightly set back from the fold 70. However, in some embodiments, the leading edge 68 may protrude to at least partially cover the fold 70. Whatever the case may be, the edge before 68 will be located near the fold 70 not to enter the slot 14.
  • the leading edge 66 of the support plate 62 is not coated by the blanket 64 and is inserted into the slot 14.
  • the front fold 70 passes over the chamfer 18 and the front edge 66 of the plate 62 runs along the wall before 16 of the slot 14.
  • the blanket unit 3 has a rear configuration similar to the rear edge 72 of the plate 62 which is not covered by the rear edge 74 of the blanket 64.
  • the rear edge 72 is folded at a fold rear 76 by relative to the rest of the support plate 62 forming, by difference with the front of the blanket unit 3, an obtuse angle.
  • the bare rear edge 72 is inserted into the slot 14 and extends along and against the rear wall 20 of the slot 14.
  • the trailing edge 74 of the blanket 64 is disposed near the rear fold 22 so as not to penetrate the slot 14 and be relatively close to the front edge 68 of the blanket 64.
  • the front 66 and rear 72 edges of the support plate 62 extend within the slot 14 into the cavity 12 and form a non-zero angle therebetween.
  • the rear edge 72 of the support plate 62 has at its free end 78 a series of openings 80 distributed along the end 78. These openings 80 have substantially a rectangular shape and are each arranged next to a pair of hook 30 / support member 32.
  • the front edge 66 of the support plate 62 is first inserted into the slot 14, then the blanket unit 3 is wound around the cylinder 2 to engage the rear edge 72 of the cylinder. the support plate 62 in the slot 14. The blanket unit 3 is then in the position of FIG.
  • each hook 30 is engaged in the corresponding opening 80 of the rear edge 72 of the support plate 62 and the associated support element 32 passes through the same 80. This is illustrated in Figure 5.
  • each hook 30 exerts on the rear base 72 of the support plate 62 a traction force T substantially parallel to the rear edge 72.
  • the trailing edge 72 of the plate 62 is pulled by the hooks 30 thus ensuring a satisfactory tensioning of the blanket 64 and the front edge 66 of the support plate 2 is applied against the front wall 16. It will be noted that the rear edge 72 still forms a non-zero angle with the front edge 66 of the support plate 62.
  • the blanket unit 3 is fixed and tensioned on the cylinder 2 satisfactorily.
  • the hooks 30 and the support elements 32 allow, thanks to their embodiment in the form of elastic elements, slight displacements of the edges 66 and 72 of the support plate 2. This allows to adapt to different constraints operation of the offset press, and in particular to the phenomenon of thermal expansion of the support plate 62 and the phenomenon called "crowding".
  • the rear edge 72 of the support plate 62 may, under the effect of the thermal expansion or during the phenomenon called “crowding", further penetrate the slot 14, the hooks 30 allowing this movement while maintaining the unit blanket 3 under tension.
  • the bearing elements 32 form means 82 for applying the front edge 66 of the support plate 62 to the wall 16 which makes it possible to stabilize the blanket unit 3 on the cylinder 2.
  • apertures 80 in the support plate 62 for cooperating with the hooks 30 enables the support plate not to present curved rear edge and therefore to maintain a width of the slot 14 low.
  • the inclination of the rear edge 72 of the support plate 62 with respect to its front edge 66 also allows the slot 14 to have a slight upstream width l .
  • This width l is even lower than neither the front edge 68 nor the rear edge 74 of the blanket 64 penetrate the slot 14.
  • the blanket 64 not covering the entire front edge 66 of the support plate 62, as in FR-2,573,347, the realization of the blanket unit, and in particular the folding of the support plate, are simple and economically, while limiting vibrations during operation.
  • the application means 82 are formed not by support members 32 belonging to the fixing device 26 but by a region of the rear edge 72 of the support plate 62.
  • this rear edge 72 has an intermediate fold 84 delimiting in the rear edge 72 an end region 86 in which the openings 80 for receiving the hooks 30 are formed, and an intermediate region 88 folded less strongly relative to the rest of the Support plate 62.
  • This intermediate region 88 bears on the front edge 66 of the support plate 62 and applies it against the wall 16.
  • Figure 9 relates to a third embodiment differing from that of Figures 1 to 7 in that the means 82 for applying the front edge 66 of the support plate 62 against the wall 16 have been removed.
  • the cylinder and the blanket unit may be sold independently of one another.
  • the above principles can be used with a cylinder 2 on which two blanket units 3 are attached next to each other along the axis A of the cylinder 2.
  • the fasteners 42 associated with each blanket unit 3 may be angularly offset from each other with respect to the axis A, for example 180 °.
  • the slots 14 associated with each blanket unit 3 are diametrically opposed, which limits the vibrations generated during the rolling on the other rolls of the press, and do not extend over the entire length of the cylinder 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP03292193A 2002-09-19 2003-09-05 Ensemble comprenant une unité de blanchet et un cylindre à dispositif de fixation de blanchet, cylindre, unité de blanchet et presse offset correspondants Expired - Lifetime EP1400356B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0211620 2002-09-19
FR0211620A FR2844743B1 (fr) 2002-09-19 2002-09-19 Ensemble comprenant une unite de blanchet et un cylindre a dispositif de fixation de blanchet, cylindre, unite de blanchet et presse offset correspondants

Publications (3)

Publication Number Publication Date
EP1400356A2 EP1400356A2 (fr) 2004-03-24
EP1400356A3 EP1400356A3 (fr) 2004-04-28
EP1400356B1 true EP1400356B1 (fr) 2006-06-14

Family

ID=31897502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292193A Expired - Lifetime EP1400356B1 (fr) 2002-09-19 2003-09-05 Ensemble comprenant une unité de blanchet et un cylindre à dispositif de fixation de blanchet, cylindre, unité de blanchet et presse offset correspondants

Country Status (7)

Country Link
US (1) US6901857B2 (ja)
EP (1) EP1400356B1 (ja)
JP (1) JP4703109B2 (ja)
CN (1) CN1307052C (ja)
DE (1) DE60306057T2 (ja)
FR (1) FR2844743B1 (ja)
HK (1) HK1064069A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10250684B3 (de) * 2002-10-31 2004-04-01 Koenig & Bauer Ag Verfahren zur Herstellung eines Rotationskörpers und Rotationskörper einer Druckmaschine
JP5294736B2 (ja) * 2008-07-07 2013-09-18 西研グラフィックス株式会社 輪転印刷機のブランケット固定装置
CN102245388A (zh) * 2008-11-03 2011-11-16 特瑞堡工程系统意大利股份公司 用于凸版印刷滚筒的涂层的完成元件及其制造和完成方法、凸版印刷滚筒的涂层及其制造方法、包括这种涂层的凸版印刷滚筒、以及将这种涂层施加到凸版印刷滚筒上的方法
WO2013042104A1 (en) * 2011-09-25 2013-03-28 Hewlett Packard Indigo B.V. Blanket tensioning device
NL2020109B1 (en) * 2017-12-18 2019-06-25 Xeikon Prepress Nv Method for fixing and treating a flexible plate on a drum, and flexible plate for use therein
DE102019111510A1 (de) * 2019-05-03 2020-11-05 Koenig & Bauer Ag Druckwerk für eine Offsetdruckmaschine mit einem mindestens ein Gummituch tragenden Gummizylinder und Verfahren zum Handhaben eines Gummituches

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8433674U1 (de) 1984-11-16 1985-02-14 Maschinenfabrik Wifag, Bern Vorrichtung zum aufziehen eines gummituches auf einen gummituchzylinder einer rotationsdruckmaschine
DE4415683C2 (de) * 1994-05-04 1998-04-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19509563C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Zylinder mit einer Vorrichtung zum Spannen von Platten
DE19509559C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Spannvorrichtung
IT1282385B1 (it) * 1995-05-05 1998-03-20 Koenig & Bauer Albert Ag Dispositivo per fissaggio di una unita' di tessuto gommato su un cilindro di una macchina da stampa rotativa
DE29600845U1 (de) 1996-01-19 1996-03-07 MAN Roland Druckmaschinen AG, 63075 Offenbach Vorrichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder
DE19642141C1 (de) * 1996-10-12 1998-06-18 Koenig & Bauer Albert Ag Vorrichtung zum Lösen von Platten
DE19924786B4 (de) * 1999-05-29 2004-11-04 Koenig & Bauer Ag Vorrichtung zum Befestigen einer biegsamen Platte auf einem Zylinder einer Rotationsdruckmaschine
JP3461487B2 (ja) * 2000-07-06 2003-10-27 株式会社東京機械製作所 印刷胴の被装着体装着装置並びに印刷版及びブランケット
JP3446122B2 (ja) * 2000-07-12 2003-09-16 株式会社東京機械製作所 ブランケット胴
DE10060171C1 (de) * 2000-12-04 2002-05-23 Koenig & Bauer Ag Vorrichtung zum Befestigen eines Aufzuges auf einem Zylinder
DE10060984B4 (de) * 2000-12-08 2006-10-26 Man Roland Druckmaschinen Ag Vorichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder

Also Published As

Publication number Publication date
FR2844743B1 (fr) 2004-12-17
CN1495018A (zh) 2004-05-12
JP4703109B2 (ja) 2011-06-15
JP2004268564A (ja) 2004-09-30
DE60306057T2 (de) 2007-01-04
EP1400356A3 (fr) 2004-04-28
CN1307052C (zh) 2007-03-28
US6901857B2 (en) 2005-06-07
HK1064069A1 (en) 2005-01-21
FR2844743A1 (fr) 2004-03-26
US20040216629A1 (en) 2004-11-04
EP1400356A2 (fr) 2004-03-24
DE60306057D1 (de) 2006-07-27

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