EP1772264B1 - Machine d'impression rotative avec compensateur de tension pour bande coupée en long et procédé d'impression de la bande coupée en long - Google Patents

Machine d'impression rotative avec compensateur de tension pour bande coupée en long et procédé d'impression de la bande coupée en long Download PDF

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Publication number
EP1772264B1
EP1772264B1 EP06405424A EP06405424A EP1772264B1 EP 1772264 B1 EP1772264 B1 EP 1772264B1 EP 06405424 A EP06405424 A EP 06405424A EP 06405424 A EP06405424 A EP 06405424A EP 1772264 B1 EP1772264 B1 EP 1772264B1
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EP
European Patent Office
Prior art keywords
partial webs
web
printing machine
machine according
rotary printing
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.)
Not-in-force
Application number
EP06405424A
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German (de)
English (en)
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EP1772264A2 (fr
EP1772264A3 (fr
Inventor
Beat Luginbühl
Carlo Manta
Thomas Seiler
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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Publication of EP1772264A2 publication Critical patent/EP1772264A2/fr
Publication of EP1772264A3 publication Critical patent/EP1772264A3/fr
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Publication of EP1772264B1 publication Critical patent/EP1772264B1/fr
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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
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B41F13/56—Folding or cutting
    • B41F13/58—Folding or cutting lengthwise

Definitions

  • the invention relates to the rotary pressure, preferably the roller pressure. It can be used with advantage in particular for working with dampening solution pressure, preferably offset printing. A typical application is newspaper printing.
  • the fan-out effect and the associated problems with regard to the print quality are known.
  • the web under tension experiences a transverse expansion or broadening, which suffers especially in multi-color printing, the print quality.
  • the phenomenon is commonly encountered with anti-fan-out devices acting on the web, such as anti-fan-out scooters or rollers.
  • the DE 35 45 270 C1 , the DE 103 41 229 A1 and the WO 88/05022 A1 called.
  • a web-fed rotary printing press having a printing unit for printing a web having six axially juxtaposed printed pages.
  • the printing web can be guided through a superstructure of the printing press and cut longitudinally into three sub-webs. Subsequently, the partial webs can be fed to a folder by means of a conveyor roller.
  • the invention is based on the idea that a web should be cut longitudinally before printing in partial webs, since the problem of transverse strain in each of the partial webs can be met more easily than with a wider original web. Across the width of an example one- or two-page-wide sub-web, the transverse strain plays a much smaller role than in a four- or six-page-wide starting web, for example.
  • the partial webs are not easily conveyed through printing gaps and printed there, but it is acted on at least one of the partial webs that extends their path between the pressure gaps relative to the web path of the other or at least one other sub-web or shortened to compensate for different elongations, which experience the partial webs between the pressure gaps, ie to compensate.
  • more easily manageable partial webs are printed in relation to the transverse strain, and these partial webs are further compensated with respect to differences in longitudinal expansion. In this way, an improved printing result with respect to transverse strain and elongation variations is obtained.
  • a rotary printing press as the invention relates, accordingly comprises a cutting device for longitudinal cutting of the web in partial webs.
  • a cutting device for longitudinal cutting of the web in partial webs.
  • four-side-wide or six-side-wide webs which are preferred examples of parent webs, can be cut longitudinally, particularly into two-page-wide or one-page-wide sub-webs or combinations of such sub-webs.
  • the rotary printing machine further comprises at least two pairs of cylinders, namely a first pair of cylinders arranged on a web path of the web or sub-webs after the cutter and forming a first printing nip for the web or sub-webs, and another cylinder pair following on the web path the first pair of cylinders is arranged and forms a further pressure gap for the web or partial webs.
  • the web or the partial webs are preferably printed with two different colors.
  • the rotary printing press further comprises a arranged on the web path between the pairs of cylinders length expansion compensator which forms a wrapping axis for at least one of the partial webs and is movable transversely to the Umschlingungsachse for compensating for differences in longitudinal elongation partial webs, so that in dependence on the Length difference difference of the track path of the respective sub-web is extended or shortened compared to the web path to the at least one other sub-web or at least one of the several other sub-webs.
  • the elongation variation is compensated so that the partial webs are printed in register in the common further printing nip with respect to the circumferential register.
  • a length expansion compensator is basically sufficient for only one of the partial webs.
  • the length expansion compensator for n-1 partial webs ever one Forming belt, which is transversely movable relative to the other Umschlingungsachsen respectively.
  • the length expansion compensator forms a single transversely movable wrapping axis for each partial web which can be obtained from the original web by means of the cutting device.
  • the length expansion compensator comprises n mechanically compensator structures movable independently of one another, ie at least n-1 and more preferably n compensator structures, each of which forms one of the wrapping axes and which are mechanically independently adjustable.
  • the at least one compensator structure of the elongation expansion compensator or preferably a plurality of compensator structures is or are preferably each cylindrical with a peripheral surface parallel to the wrapping axis or to the respective wrapping axis.
  • the wrapping axis or several wrapping axes preferably points or points parallel to the axes of rotation of the cylinder pairs.
  • the easiest way to achieve that the partial webs are preferably not offset laterally as preferred by the length expansion compensator.
  • Such a length expansion compensator acts in the manner of a cutting register adjustment device, but lays back only small travel paths for the compensation of elongation variations in comparison to the travel paths of known cutting register adjustment.
  • the at least one compensator structure or the preferred plurality of compensator structures of the elongation expansion compensator is or are preferably each looped in the current production in all operating conditions of the or the sub-webs. In principle, however, it should not be ruled out that one or more compensator structures are or will be moved out of the loop in certain operating states.
  • the length expansion compensator preferably comprises a plurality of individually adjustable compensator structures
  • the compensator structures can be moved into a position in which all the circumferential axes of the elongation expansion compensator are in alignment with one another.
  • the compensator structures in this neutral position preferably form a uniform, particularly preferably cylindrical Peripheral surface, so that the compensator for example, a non-cut web can be used simply as a guide roller.
  • the invention is advantageously used in rubber / rubber printing, but in principle can also be used in printing with satellite printing units.
  • the length expansion compensator between two satellite printing units, d. H. be arranged between the last printing nip of the one printing unit in the web path and the next printing nip of the following satellite printing unit in the web path.
  • the length expansion compensator can be arranged particularly advantageously in a printing tower, which has, for example, four or more pressure gaps one above the other.
  • the rotary printing press comprises at least one printing tower with at least two printing gaps formed one above the other, namely the first printing nip and the further printing nip.
  • the first cylinder pair is part of a first printing unit and the further cylinder pair is part of a further printing unit of the printing tower.
  • the first cylinder pair is preferably the last pair of cylinders of the first printing unit in the web path
  • the further pair of cylinders is preferably the next pair of cylinders of the further printing unit in the web path.
  • the printing units may be in particular so-called H-printing units with two cylinder bridges each consisting of two transfer cylinders, preferably blanket cylinders, and two downstream form cylinders, preferably plate cylinders, wherein the per pressure unit two pressure bridges are arranged together in cross-section H-shaped. Since the web path between the printing units is noticeably longer than the web paths in each case within the printing units, the length expansion compensator is preferably arranged between the printing units.
  • the web is printed in more than two printing nips, in principle even several elongation expansion compensators can be arranged between the several printing nips, ie in each case one elongation expansion compensator between two printing nips next to the web path. If the partial webs are successively printed, for example, in four printing gaps, this means that a total of three elongation compensators can be provided, or even only two between different printing gaps. In the usual configurations of printing nips it is however, this is completely sufficient if only one longitudinal expansion compensator is provided for the partial webs to be printed together in several printing nips, in particular in the above-described examples for the arrangement of printing units and printing units composed of several printing units. As a printing unit, in each case arranged on one side of the web or partial webs cylinders and rollers are considered.
  • a guide device is arranged on the track path downstream of the cutting device, which also forms a wrapping axis for at least one of the partial webs and aligns the wrapping partial web laterally, ie transversely to its conveying direction.
  • the guide device is constantly wrapped in a preferred embodiment in the current production of the respective sub-web and thus ensures permanent for their orientation transverse to the conveying direction.
  • the guide device advantageously aligns the partial web with a longitudinal folding device, preferably a longitudinal folding funnel.
  • the guide device is particularly advantageous in order to safely guide undelivered partial webs, between which there is no or virtually no gap, namely to keep each track separately.
  • the guide device is arranged in preferred embodiments on the web path in front of the length expansion compensator, particularly preferably next to each other, so that the sub-web or preferably the plurality of sub-webs, which is guided over both the guide means and the elongation expansion compensator or from the wrap of the Guide device runs directly into the loop with the length expansion compensator or run.
  • the guide device can also be arranged on the web path only after the further printing nip.
  • the rotary printing machine comprises a front of the elongation expansion compensator and further arranged after the further pressure nip guide means.
  • the guide device can be arranged in yet another alternative between the cutting device and the first pair of cylinders, in particular to keep unspread part tracks safely on track.
  • the rotary printing press may comprise guide means arranged at two of the three named locations and finally also at all three locations, to which the above applies in each case.
  • the guide device has in preferred embodiments for the partial web guided by it a radially recessed central portion and axially on both sides of the recessed portion depending on a radially projecting portion, wherein measured along the Umschlingungsachse length of the guide means at least substantially the width of her guided Partial track corresponds. It has a slight excess over the partial web.
  • the protruding sections are so wide in the axial direction that a partial web which is narrowest for the printing machine covers with its two side edges the protruding sections preferably by at least 10 mm.
  • the projecting portions and the recessed portion are preferably cylindrical, ie axially straight, at least in the looping area. Preferably, they are circular cylindrical over their entire circumference.
  • the transition between the recessed portion and the two protruding portions is advantageously gradual on both sides of the recessed portion, so that the guide means continuously tapers from the protruding portions toward the sub-web center.
  • a gradual taper from the projecting portions to the recessed portion has the advantage over a step-shaped transition that the side edges of the guided sub-web can unhindered run onto the edge-side projecting portions with respect to the sub-web.
  • a gradual taper has the advantage that even with a comparatively small wrap angle of the sub-web guided under tension ensures compliance with the axial position and wrinkling is reliably prevented.
  • due to the gradual taper even at lesser wrap the fan-out effect is compensated more largely than in abrupt transitions.
  • transition portions forming connecting portions may be rounded in the axial direction, in particular trumpet-shaped or arched bulging outward, preferably they are straight, ie they have in a longitudinal section of the guide means obliquely toward each other and close to each other an angle of slightly less than 180 °.
  • the inclination, whether rounded or straight, is chosen so that although a certain centering effect is achieved in the direction of the receding middle section for the guided sub-web, the sub-web, on the other hand, does not experience a lateral offset, the extent of which could be relevant with regard to the page register , In this sense, the management device keeps the guided sub-lane on track.
  • the receding section should behind the projecting portions radially by at least 0.1 mm and at most 0.5 mm, preferably at most 0.3 mm, stand back when the guided part of the web has a width in the range of 250 to 400 mm.
  • a residue of 0.2 mm in the radius of curvature or, in the case of the preferably circular-cylindrical cross-section, a difference in diameter of 0.4 mm has proven to be particularly suitable for all web widths from the stated range.
  • a correspondingly proportionally larger or smaller radial residue is preferably selected.
  • the guide device can also be optimally shaped in the residue for this web width region of the respective width.
  • the residue is selected from the stated range and the guide device is adapted to its axial width by lengthening or shortening the gradually tapering connecting sections, the axial widths of the protruding sections and the recessed section are not changed.
  • the receding portion and the protruding or raised portions may be formed only in a peripheral portion of the guide means, but it is preferable that the guide means has a rotationally symmetrical peripheral surface with respect to the wrapping axis.
  • the guide device for a plurality of partial webs, preferably for all partial webs depending on such a guide device.
  • a one-piece shaft forms the guide means.
  • the shaft may be formed in one piece or constructed of tightly joined shaft sections.
  • the shaft is rotatably mounted about a uniform for the guided several partial webs Umschlingungsachse and is preferably rotationally driven by the guided partial webs.
  • the guide device is preferably provided on its outer circumference with a spirally encircling groove, wherein the groove over the width of the guided partial web or the plurality of guided partial webs advantageously in each case several times around the Winding axis is wound.
  • two such grooves are provided on the peripheral surface of the guide device, which spiral spirally in opposite directions about the surface and cross each other accordingly.
  • a transverse expansion compensator ie an anti-fan-out device, is arranged between the first pressure nip and the further pressure nip, which is looped around by the component webs or optionally the uncut initial web.
  • a transverse expansion compensator are in particular in the EP 1 369 368 A1 .
  • EP 1 369 369 A1 and EP 1 101 721 B1 disclosed transverse expansion compensators, so that reference is made in particular with respect to the Querdehnungs-compensator details on these documents.
  • the transverse expansion compensator is preferably arranged on the web path after the elongation expansion compensator.
  • the two compensators are preferably arranged next to one another next to each other on the path so that the partial webs or the exit web from the looping with the one of the compensators enters the loop with the other.
  • the compensators also form a guide for each other in such embodiments.
  • the elongation expansion compensator can, as already mentioned, advantageously act on previously spread or non-splayed, but only longitudinally cut partial webs whose length expansion variation compensating. If the rotary printing press has a spreading device, this is arranged in front of the length expansion compensator.
  • the spreading device can in particular be arranged, as usual, on the web path between the cutting device and the printing nips. Preferred spreader are in the DE 102 34 674 A1 and the DE 103 37 248 A1 to which reference is made in this regard.
  • the partial webs are laterally offset from one another.
  • the downstream guide device or the several downstream guide devices merely ensure that the partial webs maintain the orientation obtained by the spreading, ie the mutual distance.
  • the guide means advantageously cooperates with the elongation expansion compensator according to the invention, it is in principle also advantageous on its own to align the partial webs or, if appropriate, also the uncut web, aligning them, as it were, in a true tracking manner.
  • FIG. 1 shows a part of a rotary printing press in a first embodiment.
  • the machine is a wet offset web press for newspaper printing.
  • a roll changer for automatic change between two web rolls R is arranged.
  • the web B is processed in the current production.
  • the web B first passes over a plurality of rollers of a compensating device 2 and is subsequently cut longitudinally into a plurality of partial webs T by means of a cutting device 3.
  • the web B has a width of four, for example, measured transverse to its conveying direction Printed pages, it is cut into two two-page-wide partial webs T, or four each one-page-wide partial webs T or a two-page-wide and two one-page-wide partial webs T cut. If the web B is a narrower or wider initial web, the cut is preferably also made such that the webs each have the width of one printed page or an integral multiple of a printed page. In the case of, for example, a six-page-wide starting web B, in many applications this web B will be cut into three sub-webs T each having two sides. Other divisions are basically possible as well. Only the cutting device 3 and subordinate, partial web-related devices need to be provided accordingly.
  • the partial webs T are conveyed by a spreader 4, which forms a wrapping axis for each of the partial webs T, which are inclined in a plan view of the partial webs T to the conveying direction obliquely.
  • the spreader 4 forms per sub-web T two such inclined, mutually parallel Umschlingungsachsen whose distance is preferably adjustable in the conveying direction to align the lateral offset of the partial webs T with respect to a Leksfalz issued.
  • the partial webs T are passed once again over a plurality of rolls of the compensating device 2 and then conveyed via an inlet roll of a printing tower into the printing tower and through its printing gaps.
  • the printing tower is designed as an eight-tower and includes two vertically stacked H-pressure units.
  • Each of the printing units comprises two printing bridges arranged close to one another on the web path, each of which forms a printing gap for double-sided printing of the partial webs T.
  • Each of the printing unit bridges comprises two printing units, each with a transfer cylinder and an associated forme cylinder, as well as downstream inking and dampening units.
  • the two on the path of the partial webs T first transfer cylinder 5 form a common for the partial webs T first printing nip in which the partial webs T are printed on both sides with a first color.
  • next two transfer cylinders 6 of the lower printing unit form a second printing nip, in which the sub-webs T are again printed together on both sides each with a second color.
  • the cylinder pair 6 further transfer cylinder 7 of the upper printing unit, which cooperatively form a cylinder pair as a further, third printing nip, in which the sub-webs T are printed together each with a third color.
  • the transfer cylinders 8 of the pair of cylinders last in the printing tower form a fourth printing nip, in which the sub-web T is printed on both sides with a fourth color.
  • a guide device 10 On the path of the partial webs T between the printing units, d. H. between the pairs of cylinders 6 and 7, a guide device 10, a longitudinal expansion compensator 20 and a transverse expansion compensator 19 are arranged one behind the other, which are wrapped by the partial webs T successively.
  • the guide device 10 and the transverse expansion compensator 19 are arranged next to each other next to the length expansion compensator 20, so that the partial webs T from the looping with the guide device 10 on straight path in the loop with the length expansion compensator 20 and from this wrap run in a straight path in the loop with the transverse expansion compensator 19.
  • the guide device 10 is arranged next to the cylinder pair 6 and forms a guide for the printing gap formed by the cylinder pair 6.
  • the transverse expansion compensator 19 is arranged next to the cylinder pair 7 next and serves as a guide for the printing gap formed by the cylinder pair 7, d. H.
  • the guide device 10 and the transverse expansion compensator 19 ensure that the partial webs T out and in each case from the next adjacent printing nip. Furthermore, they ensure that the length expansion compensator 20 is wrapped by the partial webs T.
  • a further guide means 10 at the output of the printing tower behind the last pair of cylinders 8, a further guide means 10, the last pair of cylinders 8 next digachbart arranged and serves as a guide for the fourth printing nip, so that the partial webs T leave the fourth printing nip tangent.
  • rotary printing machine of the second embodiment differs from the rotary printing machine of the first embodiment only by not using a spreader.
  • the sub-paths T are unspread, ie separated only by the longitudinal section separated by the pressure column promoted.
  • a third guide device 10 may be arranged in a modification in front of the first printing nip, ie, in front of the first cylinder pair 5, preferably in front of the inlet roll of the printing tower.
  • FIG. 3 shows the length expansion compensator 20 and the immediately upstream guide means 10 using the example of a six-sided-wide initial web B, which is cut longitudinally into three two-side-wide partial webs T1, T2 and T3.
  • a rotatably mounted guide roller forms the guide device 10.
  • the length expansion compensator 20 consists of three Kompensator Modellen 21, 22 and 23, which are each formed as a rotatably mounted, cylindrical smooth roller.
  • the compensator structures 21, 22 and 23 each form one wrapping axis for one of the partial webs T1, T2 and T3 which coincides with the respective axis of rotation.
  • the wrapping axes are parallel to each other.
  • the Kompensator Genten 21, 22 and 23 are relative to each other transversely to its Umschlingungsachse, adjustable in the embodiment perpendicular to the respective Umschlingungsachse so that the path of each of the partial webs T1, T2 and T3 mechanically independent of each other of the partial webs T1, T2 and T3 between the upstream guide means 10 and the downstream transverse expansion compensator 19 and thus in particular between the successive in the printing cylinder pairs 6 and 7 can be extended or shortened. In this way, differences in the elongations of the partial webs T1, T2 and T3 between the pairs of cylinders 6 and 7 can be compensated.
  • the Kompensator Genten 21 to 23 are movable into and out of a neutral position in which they are aligned with each other and form over the entire width of the web B continuous, cylindrical deflection device for a non-longitudinally cut web B or possibly also for the partial webs T1 to T3.
  • the Kompensator Modellen 21 to 23 are each mechanically independent of the other transversely to the belt axis linearly adjustable. In alternative embodiments, a pivoting adjustment is possible instead of a linear adjustment movement.
  • the compensator structures 21 to 23 each have an axial length corresponding to a two-side-wide partial web T1, T2 or T3.
  • two-page-wide Kompensator Designen 21-23 axially side by side only one-page-wide Kompensator Concepten be provided in a width corresponding to the width of the printing press number, ie, for example, four each side-wide compensator structures in the case of a four-page wide printing machine or six compensator structures in the case of a six-page wide printing machine.
  • adjacent compensator structures can either be adjusted synchronously synchronously, or in an alternative embodiment a mechanical locking option can also be provided be to mechanically rigidly connect adjacent Kompensator Modell at least with respect to the adjustment movement. In the case of a mechanical locking this is solvable.
  • the compensator structures or a part of the compensator structures for example, frontally extendable and extendable pins and corresponding pin receptacles have by their engagement each two adjacent Kompensator Modellen with respect to the adjustment stiff connected to each other and the respective compound is again releasable, preferably via a machine or printing tower control.
  • FIGS. 4 and 5 Such a guide device 10 is arranged both immediately before the length expansion compensator 20 as well as next to the last pair of cylinders 8.
  • a third guide device 10 can be arranged in front of the first cylinder pair 5, preferably in front of the inlet roller of the printing tower, in order to align the partial webs T1-T3 immediately after the longitudinal cutting to the longitudinal fold.
  • the guide device 10 is formed in one piece as a hollow cylindrical roller. It continuously forms a single wrap-around axis for the partial webs T1 to T3 and is freely rotatably mounted around this wrap-around axis.
  • the outer circumferential surface of the guide device 10, which contacts the partial webs T 1 to T 3, is axially alternately divided into recessed portions 13 and, on the other hand, radially projecting, ie raised, portions 15.
  • the axial length of the guide device 10 corresponds the maximum width of the processable in the rotary printing machine web B plus any lateral offset by spreading. In the exemplary embodiment, it is assumed that webs B can be printed with a maximum width of four printed pages in the machine.
  • the guide device 10 is divided into four axially juxtaposed, one-page-wide sections, wherein the width of each of these sections between an axial center of two mutually adjacent protruding sections 15 is measured.
  • Each of the one-side-wide portions has a central recessed portion 13 at the center and at both outer ends a half-protruding portion 15, wherein the two outermost protruding portions 15 are extended axially outward.
  • a connecting portion 14 is provided between the recessed portions 13 and the next adjacent projecting portions 15.
  • the guide device 10 tapers in each case from the diameter of the protruding sections 15 to the diameter of the respectively adjacent rearward section 13.
  • the connecting sections 14 are formed as truncated cones, ie there is everywhere a rectilinear tapering or widening.
  • the recessed portions 13 and the protruding portions 15 are cylindrical.
  • the projecting portions 15 have a very small radial projection with respect to the recessed portions 13.
  • the recessed portions 13 and the protruding portions 15 are each 50 mm long, and the connecting portions 14 each have a length of 120 mm.
  • the radial projection of the protruding portions 15 is 0.2 mm from the recessed portions 13.
  • diameter of the protruding portions 15 of 122 mm results for the recessed portions 13 each have a diameter of 121.6 mm. This in plan view and in longitudinal section very flat V-shape is sufficient to align the partial webs axially. If the web is cut into, for example, two two-side-wide partial webs, each of these partial webs wraps around two one-side-wide sections of the guide device 10.
  • the guide device 10 is as in FIG. 5 indicated relative to the two Lssensfalz wornen aligned.
  • the middle of the left to right second and fourth section 15 are aligned with funnel tips of the Quarterfold facility.
  • the rotary printing machine is a six-side-wide machine, its guide device 10 would be extended axially correspondingly by two one-side-wide sections.
  • the folding device would then preferably comprise three funnels, wherein the third funnel would in turn be arranged in the conveying direction in alignment with a second-but-one section 15.
  • the guide means 10 is provided on its web contacting peripheral surface, ie its outer surface, with two spiral grooves 12 which spiral spirally in opposite directions around the wrap and therefore cross each other and form a cross groove, so to speak.
  • the turns of the spiral grooves 12 are axially adjacent to each other so closely that each of the one-side-wide sections of the guide means 10 has a plurality of turns of the groove 12.
  • each of the sections has at least 5 and at most 8 turns next to each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Rotary Presses (AREA)
  • Handling Of Sheets (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (29)

  1. Machine à imprimer rotative, comportant :
    a) des moyens de coupe (3) pour la découpe longitudinale d'une bande (B) en bandes partielles (T1, T2),
    b) une première paire de cylindres (5) agencée sur un trajet de bande de la bande ou des bandes partielles après les moyens de coupe (3) et formant un premier espace d'impression pour la bande ou les bandes partielles,
    c) une autre paire de cylindres (7) agencée sur le trajet de bande après la première paire de cylindres (5) et formant un autre espace d'impression pour la bande ou les bandes partielles,
    caractérisée en ce que
    d) la machine à imprimer rotative comporte un compensateur d'allongement longitudinal (20) agencé sur le trajet de bande entre les paires de cylindres (7), lequel compensateur forme un axe d'enroulement pour au moins une des bandes partielles et est mobile transversalement à l'axe d'enroulement pour compenser des différences d'allongements longitudinaux des bandes partielles.
  2. Machine à imprimer rotative selon la revendication 1, dans laquelle le compensateur d'allongement longitudinal (20) inclut une première structure de compensateur (21) formant un axe d'enroulement pour une première des bandes partielles, et une seconde structure de compensateur (22) formant un axe d'enroulement pour une seconde des bandes partielles, dans laquelle au moins une des structures de compensateur (21, 22) est mobile par rapport à l'autre structure transversalement à son axe d'enroulement pour effectuer la compensation.
  3. Machine à imprimer rotative selon les revendications précédentes, dans laquelle les structures de compensateur (21, 22) sont agencées axialement l'une à côté de l'autre.
  4. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, dans laquelle le compensateur d'allongement longitudinal (20) comporte au moins un rouleau qui forme l'axe d'enroulement.
  5. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, comportant en outre au moins un cylindre supplémentaire (6) qui forme avec un cylindre d'impression complémentaire (6) un espace d'impression intercalé sur le trajet de bande allant du premier espace d'impression jusqu'à l'autre espace d'impression, dans laquelle le trajet de bande de l'espace d'impression intercalé jusqu'à l'autre espace d'impression est plus long que le trajet de bande du premier espace d'impression jusqu'à l'espace d'impression intercalé, et dans laquelle le compensateur d'allongement longitudinal (20) est agencé sur le trajet de bande de l'espace d'impression intercalé jusqu'à l'autre espace d'impression.
  6. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, comportant des moyens de guidage (10) agencés sur le trajet de bande, lesquels moyens de guidage forment un axe d'enroulement pour au moins une des bandes partielles et orientent latéralement cette bande partielle.
  7. Machine à imprimer rotative selon la revendication précédente, dans laquelle les moyens de guidage (10) sont agencés entre les paires de cylindres (5, 7).
  8. Machine à imprimer rotative selon la revendication 6, dans laquelle les moyens de guidage sont agencés entre les moyens de coupe (3) et la première paire de cylindres (5).
  9. Machine à imprimer rotative selon la revendication 6, dans laquelle les moyens de guidage (10) sont agencés après l'autre paire de cylindres (7).
  10. Machine à imprimer rotative selon l'une quelconque des revendications 7 à 9, dans laquelle les moyens de guidage (10) comportent, sur une circonférence extérieure, au moins une partie en retrait (13) et une partie en saillie (15) de manière axiale par rapport aux deux côtés de la partie en retrait (13).
  11. Machine à imprimer rotative selon la revendication précédente, dans laquelle au moins les parties en saillie (15) sont cylindriques.
  12. Machine à imprimer rotative selon l'une quelconque des deux revendications précédentes, dans laquelle les moyens de guidage (10) sont formés d'un seul tenant ou sont fabriqués à partir de parties axiales.
  13. Machine à imprimer rotative selon l'une quelconque des trois revendications précédentes, dans laquelle les moyens de guidage (10) comportent chacun une partie de liaison (14) entre la partie en retrait (13) et la partie en saillie (13, 15), laquelle partie de liaison s'élargit progressivement à partir de la partie en retrait (13) jusqu'à la partie en saillie (15) respective.
  14. Machine à imprimer rotative selon la revendication précédente, dans laquelle les moyens de guidage (10) s'élargissent de manière rectiligne dans les parties de liaison (14).
  15. Machine à imprimer rotative selon l'une quelconque des revendications 7 à 14, dans laquelle les moyens de guidage (10) forment un axe d'enroulement pour plusieurs des bandes partielles et comportent des parties en retrait (13) et des parties en saillie (15) axialement alternées.
  16. Machine à imprimer rotative selon l'une quelconque des revendications 11 à 15, dans laquelle la partie en retrait (11) est en retrait d'au moins 0,1 mm et d'au plus 0,3 mm derrière les parties en saillie (15).
  17. Machine à imprimer rotative selon l'une quelconque des revendications 11 à 16, dans laquelle les parties en saillie (15) présentent des centres axiaux qui ont une distance axiale les uns des autres au moins sensiblement égale à la largeur d'une bande partielle complète.
  18. Machine à imprimer rotative selon l'une quelconque des revendications 7 à 17, dans laquelle une rainure (12) s'étend en spirale sur une circonférence extérieure des moyens de guidage (10).
  19. Machine à imprimer rotative selon l'une quelconque des revendications 7 à 18, dans laquelle les moyens de guidage (10) sont agencés sur le trajet de bande avant le compensateur d'allongement longitudinal (20).
  20. Machine à imprimer rotative selon l'une quelconque des revendications 7 à 19, dans laquelle les moyens de guidage (10) sont agencés sur le trajet de bande le plus proche du compensateur d'allongement longitudinal (20).
  21. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, comportant en outre un compensateur d'allongement transversal (19) enroulable, agencé sur le trajet de bande entre les paires de cylindres (5, 7).
  22. Machine à imprimer rotative selon la revendication précédente, dans laquelle le compensateur d'allongement transversal (19) est agencé sur le trajet de bande après le compensateur d'allongement longitudinal (20).
  23. Machine à imprimer rotative selon l'une quelconque des deux revendications précédentes, dans laquelle le compensateur d'allongement transversal (19) est agencé sur le trajet de bande le plus proche du compensateur d'allongement longitudinal (20).
  24. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, comportant en outre des moyens d'écartement (4) agencés sur le trajet de bande après les moyens de coupe (3) et avant le compensateur d'allongement longitudinal (20), lesquels moyens d'écartement forment, pour au moins une des bandes partielles, un axe d'enroulement incliné par rapport à une direction de transport lorsque les bandes partielles sont vues de dessus afin de décaler latéralement les bandes partielles les unes par rapport aux autres.
  25. Procédé pour imprimer une bande dans une machine à imprimer rotative, comportant les étapes consistant à :
    a) transporter la bande (B) de manière continue et la découper longitudinalement en bandes partielles (T1, T2),
    b) imprimer les bandes partielles dans un premier espace d'impression et au moins un autre espace d'impression agencé sur un trajet de bande des bandes partielles après le premier espace d'impression,
    caractérisé en ce qu'il comporte l'étape consistant à :
    c) rallonger ou raccourcir le trajet de bande d'une première des bandes partielles entre les espaces d'impression par rapport à une seconde des bandes partielles, et compenser ainsi une différence d'allongement longitudinal des bandes partielles.
  26. Procédé selon la revendication précédente, comportant l'étape consistant à écarter les bandes partielles avant la compensation de la différence d'allongement longitudinal.
  27. Procédé selon la revendication 25, comportant l'étape consistant à compenser les bandes partielles après la découpe longitudinale sans écartement par rapport à la différence d'allongement longitudinal.
  28. Procédé selon l'une quelconque des revendications 25 à 27, comportant l'étape consistant à orienter au moins une des bandes partielles sur le trajet de bande transversalement à une direction de transport des bandes partielles, de préférence sur des moyens de pliage longitudinal, avant la compensation de la différence d'allongement longitudinal et de préférence après le premier espace d'impression, de préférence également après l'autre espace d'impression.
  29. Procédé selon l'une quelconque des revendications 25 à 28, comportant l'étape consistant à compenser une variation d'allongement transversal mesurée sur la largeur de bande pour au moins une des bandes partielles avant l'autre espace d'impression, de préférence après la compensation de la différence d'allongement longitudinal.
EP06405424A 2005-10-07 2006-10-05 Machine d'impression rotative avec compensateur de tension pour bande coupée en long et procédé d'impression de la bande coupée en long Not-in-force EP1772264B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005048246A DE102005048246B4 (de) 2005-10-07 2005-10-07 Rotationsdruckmaschine mit Längendehnungs-Kompensator und Verfahren zum Bedrucken einer längsgeschnittenen Bahn

Publications (3)

Publication Number Publication Date
EP1772264A2 EP1772264A2 (fr) 2007-04-11
EP1772264A3 EP1772264A3 (fr) 2009-11-25
EP1772264B1 true EP1772264B1 (fr) 2011-08-03

Family

ID=37646585

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Application Number Title Priority Date Filing Date
EP06405424A Not-in-force EP1772264B1 (fr) 2005-10-07 2006-10-05 Machine d'impression rotative avec compensateur de tension pour bande coupée en long et procédé d'impression de la bande coupée en long

Country Status (3)

Country Link
EP (1) EP1772264B1 (fr)
AT (1) ATE518655T1 (fr)
DE (1) DE102005048246B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2013127B1 (fr) * 2006-05-02 2012-07-11 WIFAG Maschinenfabrik AG Dispositif d'écartement de tronçons de voies ferrées
DE102007004408B4 (de) * 2007-01-30 2011-12-08 Koenig & Bauer Aktiengesellschaft Verfahren zur Kompensation einer Querdehnung einer Bedruckstoffbahn und eine Druckmaschine
DE102013218890B4 (de) * 2013-09-20 2019-11-07 Koenig & Bauer Ag Druckmaschine mit einer Breitstreckvorrichtung
CN112757763B (zh) * 2021-01-04 2022-08-09 日照市志德印刷有限公司 一种高效印刷机

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117663C2 (de) * 1981-05-05 1984-09-20 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Rollenrotationsdruckmaschine
DE3545270C1 (de) * 1985-12-20 1987-04-23 Roland Man Druckmasch Breitstreckvorrichtung
DE8700374U1 (de) * 1987-01-09 1987-03-19 Lüraflex GmbH Gerhard Lückenotto, 40880 Ratingen Breitstreckwalze für Bahnenwerkstoffe
DE20221937U1 (de) * 1991-01-23 2009-06-18 Koenig & Bauer Aktiengesellschaft Rollenrotationsdruckmaschine
DE4327646C5 (de) * 1992-10-23 2006-04-27 Kabushiki Kaisha Tokyo Kikai Seisakusho Breiten-Einstellverfahren für eine Papierbahn sowie damit ausgerüstete lithographische Rotationspresse
DE19955099B4 (de) * 1999-11-16 2010-02-11 Maschinenfabrik Wifag Rotationskörpergebilde für eine Bahnbreitenkorrektur
DE10225200B4 (de) * 2002-06-06 2007-04-26 Maschinenfabrik Wifag Rotationskörper für eine Kompensation des Fanout
DE10225199B4 (de) * 2002-06-06 2004-05-06 Maschinenfabrik Wifag Fluidbeaufschlagter FanOut-Kompensator
DE10234674B4 (de) * 2002-07-30 2010-04-29 Wifag Maschinenfabrik Ag Bahnspreizvorrichtung
DE10337248B4 (de) * 2003-08-13 2009-12-17 Maschinenfabrik Wifag Bahnspreizverfahren und Bahnspreizvorrichtung
DE10341229B4 (de) * 2003-09-04 2007-09-06 Koenig & Bauer Aktiengesellschaft Leitwalze

Also Published As

Publication number Publication date
DE102005048246A1 (de) 2007-04-19
ATE518655T1 (de) 2011-08-15
EP1772264A2 (fr) 2007-04-11
DE102005048246B4 (de) 2009-09-10
EP1772264A3 (fr) 2009-11-25

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