EP0972639B1 - Dispositif de positionnement d'un cliché flexible sur un cylindre porte-cliché - Google Patents

Dispositif de positionnement d'un cliché flexible sur un cylindre porte-cliché Download PDF

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Publication number
EP0972639B1
EP0972639B1 EP99109884A EP99109884A EP0972639B1 EP 0972639 B1 EP0972639 B1 EP 0972639B1 EP 99109884 A EP99109884 A EP 99109884A EP 99109884 A EP99109884 A EP 99109884A EP 0972639 B1 EP0972639 B1 EP 0972639B1
Authority
EP
European Patent Office
Prior art keywords
claw
baseplate
cylinder
plate cylinder
plate
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
EP99109884A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0972639A1 (fr
Inventor
Roger Saladin
Charles Stark
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.)
Bobst Mex SA
Original Assignee
Bobst 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 Bobst SA filed Critical Bobst SA
Publication of EP0972639A1 publication Critical patent/EP0972639A1/fr
Application granted granted Critical
Publication of EP0972639B1 publication Critical patent/EP0972639B1/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
    • 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 subject of the present invention is a device for positioning of a flexible plate on a forme cylinder, device allowing in particular to skew this flexible shot on the cylinder slide holder of a rotary printing machine.
  • machines Frequently used in the packaging industry for printing of plate elements such as sheets of paper or carton, such machines are usually called machines flexo printing and include several constituent stations, namely according to a logical development upstream downstream referring to the meaning of moving elements in plate, an introductory station successively seizing one leaf after another from below a stack, a suite of one or more printing groups that can be chosen be intercalated by one or more dryers, and finally a station of receipt collecting the printed elements.
  • the transport of the leaves of a station or group to group is by the top of these by means of a train of rollers and a suction system thus releasing totally the lower surfaces printed with leaves.
  • each of these groups printers usually dedicated to printing a certain color, includes a cylinder cliché around which wraps and y is stretched the flexible snapshot. Coated ink thanks to a screen cylinder, this cliché prints on the sheet, depending on the number of print forms it includes, one or more patterns at each rotation of the cylinder on the scrolling sheet between the forme cylinder and a pressure roller all two arranged so that printing is done on the underside of the leaves.
  • the printing form consisting of a rubber material or plastic
  • a flexible support base in polyester such as Mylar
  • polyester such as Mylar
  • the upstream and downstream ends of the flexible support base are equipped with a plastic strip of which one of the longitudinal edges is shaped-shaped U and allows the fixation of the cliche in a claw secured to the cylinder forme. This claw is itself arranged parallel to the axis of rotation of this cylinder.
  • a thin metal plate, riveted to the strip plastic and with an oblong hole of upstream-downstream longitudinal axis, allows a quick and precise lateral positioning of the shot on its cylinder by nesting on a centering pin integral with the claw.
  • US Pat. No. 5,488,904 describes a device comprising two parallel bars grasping the ends of the plate.
  • a mechanism controlled by the manual rotation of a graduated eccentric, allows to print a lateral displacement (parallel to the axis of rotation of the cylinder) at the back bar fixing the snapshot and pivoting the bar before thanks to a set of bent parts articulated around several pivots arranged at its ends. Thanks to an articulation dynamic spring-driven at one end of the back bar, the latter is automatically rotated to a position parallel to that occupied by the front bar when the shot is held by both ends in this device.
  • the whole mechanism is arranged in the body of the platen cylinder at the bottom of a wide and deep groove machined parallel to the axis of rotation of the cylinder.
  • the eccentric controlling the mechanism is reported on one of the side faces of the forme cylinder.
  • Another device for biasing a snapshot is given by the patent EP-232'730 where the inventor proposes a mechanism based on the pivoting of two tension bars in which are maintained tight the ends of the cliche.
  • the tension bars are connected between they at their ends by two articulated triangular shaped plates and mounted on two fixed pivots integral with the forme cylinder.
  • the pivots of the joints have a rectangular configuration so that that the snapshot tension bars rotate around a virtual P point in the median axis of the forme cylinder.
  • the control organ is arranged on one of the lateral faces of the forme cylinder and comprises a complex mechanism consisting of articulated levers that can be operated by a cylinder when the cylinder is stationary in a position determined.
  • JP 62-56146 solves the problem of biasing a snapshot by a device comprising two bars each actuated by two hydraulic cylinders.
  • the oil pressure in these four cylinders is reduced by so that four springs, previously compressed by the four jacks, can relax and push back the snap fixing bars in an opening movement.
  • the correction value is introduced numerically in a controller that converts it to an oil pressure corresponding and applied to two other additional cylinders arranged on the same side at one end of the fixing bars.
  • two inclined planes can be independently moved in a rectilinear motion so as to force, when closing the snap-fastening bars, one of the ends of each of these bars in a perpendicular displacement thanks to the triangular geometric shape of the inclined plane.
  • the inclined planes can also, according to a preferred embodiment, be actuated by a motorized screw mechanism.
  • the device for biasing a plate according to the invention aims to to overcome these disadvantages while providing a simple organ and automated, occupying only a minimal volume in the cylinder body cliché holder, and does not require stopping the machine for its use.
  • the desire to want to occupy a minimal volume contributed in particular to to realize a device with the advantage of not having to be dependent on a snapshot mechanism actuated by an actuator housed in the body of the forme cylinder.
  • the device described in this invention uses to drive his snapshot mechanism a snapshot electric motor attached to the frame of the machine, which is none other than the already allowing the displacement of the whole cylinder-cylinder during its lateral wedging.
  • the subject of the present invention is a device for positioning of a flexible snapshot in accordance with the claim 1.
  • Figures 1a and 1b show, in an overview of plan, the device for positioning a snapshot arranged in a bleeding 1 machined parallel to the axis of rotation 2 of a forme cylinder 3.
  • the biasing device is supported by a base plate 4 on which is attached a claw before 5 immutable seizing, in a notch 7, the front edge of a plate 19 disposed around the cylinder 3.
  • a movable rear claw 6 grasping the trailing edge of the plate 19 in a notch 8 has at its end C.O.C. a slide 9 engaged on a roller 10 screwed onto a stud 100 made integral with the forme cylinder 3 by two fixing screws.
  • the base 4 is attached to a roller 11 placed between the flanks 12 and 13 of a circular cam-crown 14 mounted on the not shown frame of the machine.
  • rollers 15 16 which are secured to the base plate 4, and which slide respectively in two cams 17 and 18 fixed rigidly to the bottom of the bleeding 1 of the forme cylinder 3.
  • a member 101 consisting in particular of an electric motor, is above all mechanically connected to the cylinder plate holder 3 and allows to move it laterally along its axis of rotation 2.
  • the base plate 4 comprises several supports 20 in the form of rectangular pads, held by their base by screws 21, and above which are fixed, first and with the help of the screws 23, a protective plate 22 bent in its length, then the front claw 5 held by screws 24 which also seize the protective plate 22.
  • the rear claw 6 is fixed by fastening members 103 (FIG 4) on a claw support 25 consisting of a metal plate pierced with a plurality of oblong holes 26 (Fig. 5a, 5b) through which are trunnions 27 for holding the rear claw 6 on its claw support 25 with fixing screws 28.
  • the orientation of these holes oblong 26 allows on the one hand to respect a lateral movement required of the claw holder 25 relative to the rear claw 6, and other part of driving the latter in a longitudinal movement perpendicular to the axis of rotation 2 of the forme cylinder.
  • This last movement concretizes the closing and opening of the rear claw 6 which allows respectively to extend or release the plate 19 of the cylinder 3.
  • the claw support 25 is rigidly fixed by means of screws 29 on two studs 30, in the shape of a rectangular parallelepiped, sliding on two axes. 31. These axes are maintained at each of their ends by a support 32 fixed to the base plate 4 by screws 33.
  • Au above each of these supports is a clamping screw 34 which allows to block the axis 31 in its support 32.
  • the longitudinal opening movement of the rear claw 6 is Arbitrated by seven pneumatic cylinders 40 (Fig. 5a, 5b) working simultaneously fed by conduits 41 held on the plate of base 4 by attachment flanges 42, and interconnected by connectors 43.
  • These jacks 40 are mounted, thanks to the screws 45, on 44 shaped supports of L that can also serve as attachment points for fixing the protective plate 22 and the front claw 7.
  • These supports 44 are regularly spaced and positioned each on the baseplate 4 by two fixing screws.
  • Plate 46 bent at right angles in their ends, are positioned in front of the jacks 40 and welded, standing on one of their two main stops, at the support of claw 25.
  • the axes 47 of these (Fig. 1a, 1b) push the claw support 25 in front of them by resting on the plates 46.
  • the rear claw 6 associated with the claw support 25 is then opened.
  • Closing of the rear claw 6 is performed once the pressure in the cylinders released, thanks to a plurality of springs 48 of compression (Fig. 4, 1a, 1b) which push back the claw support 25 into a longitudinal movement of closure.
  • Each of these springs 48 is guided by the rod of a screw 49 which passes through the bent plate 46 on which is supported one of the ends of these springs.
  • the second end of the springs 48 is supported on a plug 50 screwed into a retaining stud 51 itself maintained on the base plate 4 by two screws 52.
  • the retaining studs 51 also serve as a mounting bracket for a second protective plate bent 53 which partially overlaps the top of the claw support 25.
  • This protection plate 53 is fixed at its base by a plurality of screws 54 (Fig. 1a, 1b) housed in the retaining studs 51, and has circular openings leaving free access to the plugs 50.
  • the lateral positioning of the cliché 19 on the front claw 5 is provided by a centering pin 55 (Fig. 4) driven into the part upper of the front claw 5 and arranged precisely on the axis longitudinal of the printing machine.
  • FIG. 5b shows a fastener 60 attached to the end C.C. of the base plate 4 by screws 61.
  • the roller 11 is positioned on the longitudinal axis of this fastener with a screw 62.
  • Two holes 63 located around the first and the last third of the base 4, have a diameter substantially greater than that of two sockets 64 through them (Fig. 3). The excessive size of the holes 63 allows provide the necessary space for the movements of the base plate 4 while the now plated at the bottom of the groove 1 by holding organs 102; this in order to be able to fight against the effect of centrifugal force on the base plate 4 during the rotation of the forme cylinder.
  • Organs 102 are constituted by sockets 64 around which two pads 65, of synthetic material with a low coefficient of friction, sandwich the base plate 4 and allow it to move easily.
  • a compression spring 66 disposed between two other washers 67 and 68, and a screw 69 resting on the washer upper 68 and coming to screw into the bottom of the groove 1 after having through the bushing 64, maintain the clamping of the base plate 4 in a plane parallel to the section of the forme cylinder.
  • the fastener 60 is also pierced with a hole 70 crossed by a screw 71 which both respectively the same functions as the holes 63 and screws 69 described just now.
  • two openings rectangles 72 cut out of the base plate 4, make it possible to accommodate the cams C.C. 17 and C.O.C. 18 integral with the forme cylinder 3.
  • These openings 72 are larger than the size of the bases 80 cams 17 and 18, so that the base plate 4 can to move freely around these cams without bumping against one of them.
  • the openings 72 are lined in their width on each side by three aligned holes whose middle holes 73 position precisely a stirrup 74 with two cylindrical pins 75, and the end holes 76 are intended for fixing the stirrup 74 on the plate 4 by screws 77. As illustrated by FIGS.
  • the stirrups 74 constitute two bridges, integral with the base plate and arranged by above the cams 17 and 18, in the largest face of which are screwed from below the rollers 15 and 16 which slide in the respective cams 17 and 18. Screws 78 still make it possible to fix the protective plate 22 and the front claw 5 above the stirrup 74.
  • the cams 17 and 18 are symmetrical with respect to each other and consist of a staircase base 80, on the one hand pierced with a hole intended to receive a pin 81 of centering, and secondly breakthrough of two fixing holes 83 into which two screws 82 screwed into the forme cylinder 3.
  • a staircase base 80 Above the base 80, two small projecting portions 84, of triangular shape and constituting the core of the cam, between which the roller 15 or 16 slides according to the considered cam C.C. or C.O.C.
  • FIGS. 8a, 8b and 8c very schematically illustrate three very different positions in which can be said device for positioning the plate.
  • the configuration of the mechanism is in an intermediate position in accordance with the schematic illustration of Figure 8a.
  • the snapshot needs to be biased in one direction or in another, only a simple lateral displacement of the forme cylinder in the direction of its axis of rotation 2 makes it possible to actuate the mechanism snapshot of the snapshot.
  • the lateral movement of the forme cylinder 3 is controlled by the body 101 including an electric motor coupled to toothed wheels meshing with a worm.
  • This mechanism Conventional makes it possible to convert the circular motion of the tree of the motor in a rectilinear motion necessary for the lateral displacement of the cliché cylinder.
  • the displacement of the forme cylinder with the help of engine and this mechanism is further automated through sensors detecting the lateral position of the forme cylinder. These sensors are connected to an external electronic controller (not shown) controlling the motor of the organ 101.
  • the bias of a snapshot can be easily controlled and stored by the electronic controller, via position sensors, simply by memorizing the displacement side of the platen cylinder.
  • Figure 8c illustrates, in the opposite direction, the same combined movement resulting from the displacement of the forme cylinder 3 from C. to C.O.C.
  • the roller 11 is supported and slides along the opposite flank 13 of the crown cam 14.
  • the adhesion cliché stretched on the platen cylinder minimises the skewed position of the snapshot. Knowing the position of the lateral register of the cylinder cliché holder, it is then easily possible to automate the biasing of the snapshot of an angular value, to choice, by simple introduction of this value in the electronic controller.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Mechanical Operated Clutches (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP99109884A 1998-06-02 1999-05-20 Dispositif de positionnement d'un cliché flexible sur un cylindre porte-cliché Expired - Lifetime EP0972639B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH119298 1998-06-02
CH01192/98A CH689717A5 (fr) 1998-06-02 1998-06-02 Dispositif de positionnement d'un cliché flexible sur un cylindre porte-cliché.

Publications (2)

Publication Number Publication Date
EP0972639A1 EP0972639A1 (fr) 2000-01-19
EP0972639B1 true EP0972639B1 (fr) 2003-04-02

Family

ID=4204660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99109884A Expired - Lifetime EP0972639B1 (fr) 1998-06-02 1999-05-20 Dispositif de positionnement d'un cliché flexible sur un cylindre porte-cliché

Country Status (12)

Country Link
EP (1) EP0972639B1 (ko)
JP (1) JP3192640B2 (ko)
KR (1) KR100334476B1 (ko)
CN (1) CN1085147C (ko)
AT (1) ATE236016T1 (ko)
AU (1) AU748606B2 (ko)
BR (1) BR9902635A (ko)
CA (1) CA2273388C (ko)
CH (1) CH689717A5 (ko)
DE (1) DE69906426T2 (ko)
DK (1) DK0972639T3 (ko)
ES (1) ES2195469T3 (ko)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10642551B2 (en) 2017-07-14 2020-05-05 Georgia-Pacific Corrugated Llc Engine for generating control plans for digital pre-print paper, sheet, and box manufacturing systems
US11449290B2 (en) 2017-07-14 2022-09-20 Georgia-Pacific Corrugated Llc Control plan for paper, sheet, and box manufacturing systems
US11485101B2 (en) 2017-07-14 2022-11-01 Georgia-Pacific Corrugated Llc Controls for paper, sheet, and box manufacturing systems
US11520544B2 (en) 2017-07-14 2022-12-06 Georgia-Pacific Corrugated Llc Waste determination for generating control plans for digital pre-print paper, sheet, and box manufacturing systems
US11807480B2 (en) 2017-07-14 2023-11-07 Georgia-Pacific Corrugated Llc Reel editor for pre-print paper, sheet, and box manufacturing systems

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE529632C2 (sv) * 2006-12-18 2007-10-09 Berg Ind Ab Anordning för uppspänning och snedställning av klichémontage
EP2619012B1 (fr) 2010-09-21 2014-08-20 Bobst Mex Sa Procede et agencement de mise en registre des couleurs pour une machine d'impression
KR20130055172A (ko) 2011-11-18 2013-05-28 삼성디스플레이 주식회사 기판 정렬 유닛, 이를 포함하는 기판 처리 장치 및 이를 이용하는 기판 정렬 방법
DE102018214610A1 (de) * 2017-09-26 2019-03-28 Heidelberger Druckmaschinen Ag Zylinder mit einer Klemmschiene zum Festhalten eines Zylinderaufzugs in einer Druckmaschine
CN112728603A (zh) * 2020-12-31 2021-04-30 成都温骅康裕商贸有限公司 一种节能环保的用于抽油烟机滤板清理的装置

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
DE1536954B2 (de) * 1966-04-07 1971-08-12 Adamovske strojirny, N P , Adamov (Tschechoslowakei) Einrichtung zur gleichsinnigen schwenkverstellung der beiden enden einer biegsamen druckplatte
JPH07106629B2 (ja) * 1985-09-05 1995-11-15 大日本インキ化学工業株式会社 印刷機の版位置矯正装置
DE3604209A1 (de) * 1986-02-11 1987-08-13 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
JP2926656B2 (ja) * 1989-09-13 1999-07-28 アキヤマ印刷機製造 株式会社 枚葉印刷機の版ひねり調整機構
DE9318599U1 (de) * 1993-12-04 1994-02-24 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Vorrichtung zum Verschwenken von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10642551B2 (en) 2017-07-14 2020-05-05 Georgia-Pacific Corrugated Llc Engine for generating control plans for digital pre-print paper, sheet, and box manufacturing systems
US11093186B2 (en) 2017-07-14 2021-08-17 Georgia-Pacific Corrugated Llc Engine for generating control plans for digital pre-print paper, sheet, and box manufacturing systems
US11449290B2 (en) 2017-07-14 2022-09-20 Georgia-Pacific Corrugated Llc Control plan for paper, sheet, and box manufacturing systems
US11485101B2 (en) 2017-07-14 2022-11-01 Georgia-Pacific Corrugated Llc Controls for paper, sheet, and box manufacturing systems
US11520544B2 (en) 2017-07-14 2022-12-06 Georgia-Pacific Corrugated Llc Waste determination for generating control plans for digital pre-print paper, sheet, and box manufacturing systems
US11807480B2 (en) 2017-07-14 2023-11-07 Georgia-Pacific Corrugated Llc Reel editor for pre-print paper, sheet, and box manufacturing systems
US11907595B2 (en) 2017-07-14 2024-02-20 Georgia-Pacific Corrugated Llc Control plan for paper, sheet, and box manufacturing systems
US11911992B2 (en) 2017-07-14 2024-02-27 Georgia-Pacific Corrugated Llc Controls for paper, sheet, and box manufacturing systems

Also Published As

Publication number Publication date
AU3125399A (en) 1999-12-09
EP0972639A1 (fr) 2000-01-19
JP2000033688A (ja) 2000-02-02
DE69906426T2 (de) 2004-02-12
AU748606B2 (en) 2002-06-06
CH689717A5 (fr) 1999-09-15
CA2273388A1 (en) 1999-12-02
DK0972639T3 (da) 2003-07-28
KR100334476B1 (ko) 2002-04-26
CN1085147C (zh) 2002-05-22
CN1237513A (zh) 1999-12-08
DE69906426D1 (de) 2003-05-08
ATE236016T1 (de) 2003-04-15
ES2195469T3 (es) 2003-12-01
CA2273388C (en) 2003-07-01
JP3192640B2 (ja) 2001-07-30
BR9902635A (pt) 2000-02-22
KR20000005811A (ko) 2000-01-25

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