EP1400356A2 - Anordnung mit einem Gummituch und einem Gummituchzylinder; Zylinder, Gummituch und Druckmaschine - Google Patents

Anordnung mit einem Gummituch und einem Gummituchzylinder; Zylinder, Gummituch und Druckmaschine Download PDF

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Publication number
EP1400356A2
EP1400356A2 EP03292193A EP03292193A EP1400356A2 EP 1400356 A2 EP1400356 A2 EP 1400356A2 EP 03292193 A EP03292193 A EP 03292193A EP 03292193 A EP03292193 A EP 03292193A EP 1400356 A2 EP1400356 A2 EP 1400356A2
Authority
EP
European Patent Office
Prior art keywords
support plate
blanket
cylinder
slot
support
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
EP03292193A
Other languages
English (en)
French (fr)
Other versions
EP1400356A3 (de
EP1400356B1 (de
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/de
Publication of EP1400356A3 publication Critical patent/EP1400356A3/de
Application granted granted Critical
Publication of EP1400356B1 publication Critical patent/EP1400356B1/de
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

  • Such a press conventionally comprises, in addition to the blanket cylinder and blanket, a plate cylinder and a plate, and a cylinder pressure.
  • the plate carried by the plate cylinder is moistened then inked.
  • the plate transfers the ink from its printing regions on the blanket carried by the blanket cylinder.
  • the blanket then transfers the ink on the paper to be printed which passes between the blanket cylinder and the pressure cylinder.
  • FR-2,573,347 has proposed a set of the aforementioned type.
  • the front edge blanket covers the entire front edge of the support plate and therefore penetrates in the cylinder slot.
  • the rear edge of the blanket does not penetrate the slot and is applied substantially against the front fold region of the blanket.
  • the gap between the start 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 proposed another solution in which the device for fixing the blanket unit includes pressure pads which come apply the front and rear edges of the support plate against the front wall from the slot. These front and rear edges of the support plate are not coated by the blanket. The efforts exerted by the studs are exclusively perpendicular to the front and rear edges of the support plate.
  • the fixing device described does not absorb deformations of the blanket unit resulting from offset press operation.
  • the dilations of the plate of support cannot be absorbed so that ruptures of the latter in the vicinity of its rear fold.
  • FR-2 745 524 has proposed replacing the pressure pads with one or more several elastic blades. However, this arrangement still does not allow reaching a satisfactory blanket unit tension.
  • An object of the invention is to provide a set of the aforementioned type which allows to tension and fix the blanket unit on the cylinder so satisfactory, and which is simple and economical to produce.
  • the invention relates to an assembly of the aforementioned type, characterized in that the front edge of the support plate projects beyond the front edge of the blanket which is located near the front fold.
  • the invention also relates to a cylinder for an assembly such as defined above.
  • the fixing device comprises at least one support element on the front edge of the support plate to press it against the front wall of the slot, the support element being separate from the hook.
  • the invention further relates to a blanket unit for a together as defined above.
  • the rear edge of the support plate is itself folded at an intermediate fold defining an end region in which the hook receiving opening is provided, and a region intermediate intended to rest against the front edge of the support plate to apply it against the front wall of the slot.
  • the invention also relates to an offset press comprising a together as defined above.
  • Figure 1 schematically illustrates a set 1 for offset press which includes a cylinder 2 and a blanket unit 3 surrounding the surface device 4 of cylinder 2 and carried by cylinder 2.
  • Cylinder 2 extends along a longitudinal axis A and its ends longitudinal 5, only one of which is visible in FIG. 1, are intended to be received in bearings of the frame of an offset press. So cylinder 2 can, thanks to conventional training means not shown, turn around from its longitudinal axis A in a direction illustrated by arrow 6 in FIG. 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 part of the peripheral surface 4 of the cylinder 2.
  • This insert 10 delimits inside the cylinder 2 a cavity 12 longitudinal section of substantially rectangular and a longitudinal slot 14 of substantially triangular section.
  • the slot 14 opens into the peripheral surface 4 of the cylinder 2 and in the cavity 12.
  • the front wall 16 common to the slot 14 and to the cavity 12, is connected to the peripheral surface 4 by a chamfer 18, for example of width of approximately 1 mm.
  • This chamfer 22 has for example a width about 1.4mm.
  • the front 16 and rear 20 walls of the slot 14 diverge in approaching the cavity 12, that is to say from upstream to downstream of the slot 14.
  • the walls 16 and 20 thus form between them an angle ⁇ typically of about 14.8 °. More generally, this angle ⁇ will be less than 20 °.
  • the upstream width l of the slot 14 between the walls 16 and 20, that is to say downstream of the chamfers 18 and 22, is approximately 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 unit of blanket 3 on the cylinder 2.
  • This device 26 is housed in the cavity 12 and comprises a spindle 28 extending along a substantially parallel axis X-X to the axis A of the cylinder 2.
  • This pin 28 extends for example all along the cylinder 2.
  • hooks 30 and elements support 32 are distributed along the spindle 28.
  • the hooks 30 are formed by elastic blades whose free ends 34 are curved opposite the slot 14.
  • the support elements 32 are formed by blades elastic whose free ends 36 are bent 180 °.
  • the hooks 30 and the support elements 32 are associated in pairs, the hook 30 and the associated support element 32 being fixed by a common screw 38 on the spindle 28.
  • the support element 32 is arranged above the hook 30 associated.
  • the hook 30 / support element 32 pairs are spaced longitudinally of each other and distributed along the spindle 28.
  • the spindle 28 is rotatably mounted around its longitudinal axis X-X in the cavity 12, for example by means of bearings provided at the ends of the pin 28 and possibly in intermediate regions thereof.
  • Pin 28 is thus movable between two illustrated positions Figures 2 and 6 respectively.
  • 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 via an articulation allowing it to pivot in a plane orthogonal to the axis A of the cylinder 2.
  • the spring 50 takes support on the one hand on the block 44 and moreover on the collar 48.
  • the rod 46 can move relative to the support 44 between two stable extreme positions.
  • the first extreme stable position is shown in Figure 1. This position corresponds to the release position of the pin 28 illustrated by Figure 2.
  • the second extreme stable position is shown in FIG. 7.
  • the pin 28 is in its fixing position illustrated by the figure 6.
  • the rod 46 will then pass through an unstable neutral position where its axis will cut the axis X-X of the spindle 28.
  • the spring 50 is then compressed so that it will push the rod 46 back to its second stable position, i.e. that of FIG. 7.
  • the block 52 is then in abutment against an adjustable stop 58 which adjusts the angular position of the spindle 28 in its position fixation.
  • the neutral point crossing mechanism 42 makes it possible to manually move pin 28 from its release position to its position fixing and vice versa. Note however that any other type of mechanism 42 can be used.
  • the blanket unit 3 includes a support plate 62 and a blanket 64 fixed on the support plate support 62.
  • the support plate 62 is for example made of stainless steel. His thickness is about 0.2mm.
  • the blanket 64 conventionally comprises for example several layers of elastomer and fabric.
  • the blanket 64 is fixed to the support plate 62 by bonding or vulcanization.
  • the front edge 66 of the support plate 62 extends beyond the edge front 68 of the blanket 64.
  • the front edge 66 of the support plate 62 is folded at a front fold 70 to form with the rest of the plate 62 an angle ⁇ acute.
  • the front edge 68 of the blanket 64 is disposed slightly recessed by compared to fold 70.
  • the front edge 68 can come forward to cover at least partially the fold 70.
  • the edge before 68 will be located in the vicinity of the fold 70 so as not to enter the slot 14.
  • the front 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 front wall 16 of the slot 14.
  • the blanket unit 3 has a similar configuration at the rear with 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 rear fold 76 by relative to the rest of the support plate 62 by 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 rear edge 74 of the blanket 64 is disposed in the vicinity of the fold rear 22 so as not to enter 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 inside the slot 14 into the cavity 12 and form between them a non-zero angle.
  • the rear edge 72 of the plate support 62 has at its free end 78 a series of openings 80 distributed along the end 78. These openings 80 have substantially a shape rectangular and are each arranged opposite a pair of hooks 30 / support element 32.
  • Pin 28 is in the release position, we start by inserting the front edge 66 of the support plate 62 in the slot 14 and then wrapped the blanket unit 3 around the cylinder 2 until it engages the rear edge 72 of the support plate 62 in the slot 14. The blanket unit 3 is then in the position of figure 2.
  • each hook 30 engages 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 opening 80. This is illustrated in FIG. 5.
  • each hook 30, which is firmly engaged against the periphery of the opening 80 gradually causes the plate to energize support 2 while the associated support element 32, which passes through the opening 80, will come to bear on the front edge 66 of the plate support 62 and press it against the front wall 16 of the slot 14 and the cavity 12.
  • each hook 30 exerts on the rear bottom 72 of the support plate 62 a tensile force T substantially parallel to the edge rear 72.
  • the rear edge 72 of the plate 62 is pulled by the hooks 30, thereby ensuring 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 of satisfactorily.
  • the hooks 30 and the support elements 32 allow, thanks to their realization in the form of elastic elements, light displacements of the edges 66 and 72 of the support plate 2. This allows adapt to the different operating constraints of the offset press, and in particular to the phenomenon of thermal expansion of the support plate 62 and to the phenomenon known as "crushing".
  • the rear edge 72 of the support plate 62 may, under the effect of the thermal expansion or during the so-called “fulling” phenomenon, penetrate further in the slot 14, the hooks 30 authorizing this movement while maintaining the blanket unit 3 powered up.
  • the support elements 32 form means 82 for applying the edge front 66 of the support plate 62 on the wall 16 which make it possible to stabilize the blanket unit 3 on the cylinder 2.
  • openings 80 in the support plate 62 to cooperate with the hooks 30 allows the support plate not to have a curved rear edge and therefore to keep a width l of slot 14 small.
  • 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 small upstream width l .
  • This width l is all the smaller since neither the front edge 68 nor the rear edge 74 of the blanket 64 penetrate into the slot 14.
  • the blanket 64 does not cover the entire front edge 66 of the support plate 62, as in FR-2 573 347, the production of the blanket, and in particular the folding of the support plate, are simple and economical, while limiting vibrations during operation.
  • the means 82 are not formed by support elements 32 belonging to the fastening device 26 but by a region of the rear edge 72 of the plate support 62.
  • this rear edge 72 has an intermediate fold 84 defining in the rear edge 72 an end region 86 in which the openings 80 receiving hooks 30 are provided, and an intermediate region 88 folded less strongly relative to the rest of the support plate 62.
  • This intermediate region 88 is supported on the front edge 66 of the support plate 62 and applies it against the wall 16.
  • FIG. 9 relates to a third embodiment which stands out from that of FIGS. 1 to 7 by the fact that the means 82 for applying the edge before 66 of the support plate 62 against the wall 16 have been removed.
  • cylinder and blanket unit can be sold independently one of the other.
  • the fixing devices 42 associated with each blanket unit 3 can be angularly offset from each other with respect to the axis A, by example of 180 °.
  • the slots 14 associated with each blanket unit 3 are diametrically opposed, which limits the vibrations generated during bearing on the other cylinders of the press, and do not extend over the entire length of 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 Anordnung mit einem Gummituch und einem Gummituchzylinder; Zylinder, Gummituch und Druckmaschine Expired - Lifetime EP1400356B1 (de)

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 true EP1400356A2 (de) 2004-03-24
EP1400356A3 EP1400356A3 (de) 2004-04-28
EP1400356B1 EP1400356B1 (de) 2006-06-14

Family

ID=31897502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292193A Expired - Lifetime EP1400356B1 (de) 2002-09-19 2003-09-05 Anordnung mit einem Gummituch und einem Gummituchzylinder; Zylinder, Gummituch und Druckmaschine

Country Status (6)

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

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
CN103946024B (zh) * 2011-09-25 2017-04-19 惠普印迪戈股份公司 橡皮布张紧装置
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573347A1 (fr) 1984-11-16 1986-05-23 Wifag Maschf Dispositif pour tendre un blanchet sur un cylindre a blanchet d'une rotative
FR2733719A1 (fr) 1995-05-05 1996-11-08 Koenig & Bauer Albert Ag Dispositif destine a fixer une unite de blanchet sur un cylindre porte-blanchet
FR2745524A1 (fr) 1996-01-19 1997-09-05 Roland Man Druckmasch Dispositif pour fixer un element de revetement sur un cylindre d'un groupe d'impression

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415683C2 (de) * 1994-05-04 1998-04-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19509559C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Spannvorrichtung
DE19509563C2 (de) * 1995-03-16 1997-01-23 Koenig & Bauer Albert Ag Zylinder mit einer Vorrichtung zum Spannen von Platten
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573347A1 (fr) 1984-11-16 1986-05-23 Wifag Maschf Dispositif pour tendre un blanchet sur un cylindre a blanchet d'une rotative
FR2733719A1 (fr) 1995-05-05 1996-11-08 Koenig & Bauer Albert Ag Dispositif destine a fixer une unite de blanchet sur un cylindre porte-blanchet
FR2745524A1 (fr) 1996-01-19 1997-09-05 Roland Man Druckmasch Dispositif pour fixer un element de revetement sur un cylindre d'un groupe d'impression

Also Published As

Publication number Publication date
JP4703109B2 (ja) 2011-06-15
EP1400356A3 (de) 2004-04-28
CN1495018A (zh) 2004-05-12
US6901857B2 (en) 2005-06-07
FR2844743A1 (fr) 2004-03-26
HK1064069A1 (en) 2005-01-21
DE60306057D1 (de) 2006-07-27
US20040216629A1 (en) 2004-11-04
CN1307052C (zh) 2007-03-28
JP2004268564A (ja) 2004-09-30
EP1400356B1 (de) 2006-06-14
DE60306057T2 (de) 2007-01-04
FR2844743B1 (fr) 2004-12-17

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