EP0415882B1 - Rouleaux tendeurs pour une machine rotative d'impression - Google Patents

Rouleaux tendeurs pour une machine rotative d'impression Download PDF

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Publication number
EP0415882B1
EP0415882B1 EP90810622A EP90810622A EP0415882B1 EP 0415882 B1 EP0415882 B1 EP 0415882B1 EP 90810622 A EP90810622 A EP 90810622A EP 90810622 A EP90810622 A EP 90810622A EP 0415882 B1 EP0415882 B1 EP 0415882B1
Authority
EP
European Patent Office
Prior art keywords
roller
suction
draw
web
paper web
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
EP90810622A
Other languages
German (de)
English (en)
Other versions
EP0415882A2 (fr
EP0415882A3 (en
Inventor
Albrecht Josef Germann
Johannes Georg Schaede
Joachim Alfred Heinz Lapp
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.)
KBA Notasys SA
Original Assignee
De la Rue Giori 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 De la Rue Giori SA filed Critical De la Rue Giori SA
Publication of EP0415882A2 publication Critical patent/EP0415882A2/fr
Publication of EP0415882A3 publication Critical patent/EP0415882A3/de
Application granted granted Critical
Publication of EP0415882B1 publication Critical patent/EP0415882B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • 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
    • 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
    • B41F13/06—Turning-bar arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1317—End profile
    • B65H2404/13171—End profile tapered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/136—Details of longitudinal profile with canals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/136—Details of longitudinal profile with canals
    • B65H2404/1363—Details of longitudinal profile with canals air supply or suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/17—Details of bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/36—Means for producing, distributing or controlling suction
    • B65H2406/361—Means for producing, distributing or controlling suction distributing vacuum from stationary element to movable element
    • B65H2406/3614—Means for producing, distributing or controlling suction distributing vacuum from stationary element to movable element involving a shoe in sliding contact with an inner section of the periphery of a rotating element

Definitions

  • the invention relates to a draw roller unit for transporting a paper web in a web printing machine.
  • Previously known pull roller units used in web-fed printing machines which are used to transport the paper web, each consist of two rollers, namely a driven pull roller and a pressure roller pressing the paper web against this pull roller. Since the paper web is clamped on both sides between these two rollers, these drawing roller units can only be used in a printing unit after the printing of the paper web if it is ensured that the fresh printing ink has already dried sufficiently when the paper web has finished printing Pull roller unit passes through.
  • a draw roller unit consisting of only a single suction roller is known from GB-A-1.206.710 and is used to drive a strip of material, in particular a web provided with a photographic layer.
  • the roll shell of this suction roll has two end walls oriented perpendicular to the roll axis, and the hollow roll core is divided into two axial sections by a radial partition wall, one of which is connected to a suction pump via one end face of the roll core and the other section via the other end face of the roller core with the atmosphere, i.e. with the outside air.
  • This last-mentioned axial section of the roll core is connected via openings in the wall of the roll core to the interior space outside the suction chamber between the roll core and roll shell, so that atmospheric pressure prevails in the openings of the peripheral section of the suction roll which is not wrapped by the web.
  • a film transport roller is known from NL-A-30 18 28, against which the film which is partially wrapped around it is pressed with the aid of compressed air.
  • the transport roller dips with the segment whose surface is wrapped in the film in an otherwise closed box, the interior of which is connected to a compressed air source.
  • a first and a second drawing roller unit and in between a first paper web storage and after the printing nip a third and a fourth drawing roller unit and in between a second paper web storage are provided in front of the printing nip of the printing unit; the first and fourth draw roll units are continuously driven to move the paper web uniformly, while the second and third draw roll units for moving the paper web forward and backward are each controlled by a controlled electromotive drive.
  • All draw roller units each consist of a draw roller and a pressure roller pressing the paper web against it.
  • the paper web is transported by the two cylinders forming the printing nip, that is, in the case of an offset printing machine, the two blanket cylinders, as long as these sector-shaped cylinders during the printing act on the paper web.
  • the upstream and downstream drawing roller units are controlled so that they generate a certain paper web tension.
  • the aforementioned second and third controlled drawing roller units transport the paper web in such a way that it decelerates to a standstill within fractions of a second, then moves it backwards by a predetermined distance, then brakes again to a standstill and is accelerated again in the forward direction until normal operating speed.
  • the known pulling roller units are unfavorable for carrying out these rapid decelerations and accelerations, because on the one hand the masses of two rollers are braked and accelerated quickly and on the other hand both rollers have to be pressed against each other with very strong force in order to avoid slippage of the paper web.
  • the non-driven, freely rotatable pressure roller which must be carried along by the paper web itself, cannot follow strong decelerations and accelerations and therefore results in slippage of the paper web, which of course the perfect printing and the correct register impairment.
  • the present invention has for its object to provide a intended for a web press, working without a pressure roller unit, which acts on only one side of the paper web, ensures slip-free transport of the paper web and in particular allows the paper web to quickly defined speed changes with high accelerations , as they are desirable in web-fed printing machines with paper web transport that can be controlled in the pilgrim step.
  • the pull roller according to the invention can also be designed in such a way that the contact pressure acting on the paper web is generated by a combination of the negative pressure prevailing inside the roller and the external positive pressure.
  • the pulling roller unit according to the invention has only one pulling roller and the pressure roller that was previously required is eliminated, construction and assembly are simplified.
  • the absence of the pressure roller makes it possible to print the paper web on one side in a intaglio printing unit in crawl step operation, since a traction roller wrapped around the unprinted paper web side after the printing nip Invention can be installed.
  • intaglio printing could not be carried out in vocational step mode because drying of the freshly printed paper web is not possible in front of the traction roller unit because of the length of the drying path required for intaglio printing ink.
  • the traction roller according to the invention has a rotating roller jacket made of a light plastic, in particular made of carbon fibers impregnated with synthetic resin, so that the moving masses are particularly small and have only a small moment of inertia, which is extremely rapid in fractions of a speed when paper web transport is controlled in vocational step mode Allowed to achieve seconds.
  • the strong adhesion of the paper web to the circumference of the pulling roller which is necessary for slip-free transport, is presumably favored in the case of a roller jacket provided with openings in that the paper web bulges a little into the openings of the pulling roller under the suction effect or the compressed air effect, whereby a possible Displacement of the paper web relative to the draw roller is prevented with great certainty even under strong accelerations.
  • the air pressure differences required for reliable adhesion of the paper web between the outside of the paper web and its inside covering the openings in the roller shell are, depending on the type of paper, 0.1 to 0.8 bar.
  • This printing unit has two interacting rubber cylinders 2 and 3, which are mounted side by side in a frame 1 and rotate in the direction of the curved arrows, each with three sectors, on each of which a rubber blanket 2a or 3a is stretched. The sectors are separated by cylinder pits 2b and 3b, in which the means for tensioning the rubber blankets are subordinate.
  • This offset printing unit is therefore similar to a sheet-fed printing press.
  • Each blanket cylinder 2 and 3 works with four plate cylinders 4 and 5, which are mounted in the frame 1 and which carry offset printing plates and are colored in different colors by corresponding inking units 6 and 7, respectively.
  • the top inking unit has a single ink fountain on each side, while the remaining three inking units are equipped with a double ink fountain on each side.
  • the dampening units assigned to each inking unit indicated in FIG. 1 show, the example considered is a wet offset printing press, which can alternatively also be operated as an indirect printing press or in a combination of both processes. All inking units 6 on one side are arranged in a removable inking unit frame 8 and all inking units 7 on the other side in a removable inking unit frame 9.
  • automatic blanket washers 10 and 11 are installed on the circumference of the blanket cylinders 2 and 3, which are moved away from the blanket cylinders during the printing operation of the machine.
  • a drying device 12, 13 installed, which works with UV radiation and through which the freshly printed web runs.
  • the transport device which is accommodated together with the printing unit in a common main frame 14 is described below.
  • the web P is unwound from a storage drum (not shown) and passes via a web feed device 15 and a turning bar 16 into a first draw roller arrangement 17, consisting of a draw roller 17a, which is wrapped by the web, and a pressure roller 17b, which presses the web against the draw roller presses.
  • This pull roller arrangement 17 and the pull roller arrangement 23 mentioned later are driven uniformly.
  • the web P then, guided by deflection rollers 24, arrives via a device 18 for laterally aligning the web into a first paper web storage 19, which in the example under consideration works with a vacuum chamber.
  • Such a paper web store is known and is controlled in such a way that the paper web P between the draw roller arrangement 17 and the entrance of the paper web store 19 is tensioned taut with a predetermined force and the tension of this section of the web is kept constant at a predeterminable value.
  • This pull roller unit 20 has only a single roller designed as a suction roller and functioning as a pull roller 20b, the construction of which will be described later and which is controlled by an individually regulated drive 20a in the form of an electronically controlled motor.
  • the web emerging from the paper web store 19 wraps around it Pull roller 20b from below by approximately 180 ° and then, guided by a deflecting roller, runs through the pressure gap formed by the two rubber cylinders 2 and 3, then through the drying device 12, 13 and then loops around a pull roller 21b belonging to a second pull roller unit 21 again about 180 °.
  • This pulling roller unit 21 installed in a frame part 14a above the main frame 14 is constructed like the pulling roller unit 20, can be controlled intermittently for moving the web forwards and backwards and is in turn moved by an individually controlled drive 21a in the form of an electronically controlled motor.
  • the web passes through a second paper web store 22, which is constructed and controllable in the same way as the paper web store 19, and is then guided over a plurality of deflection rollers 24 and a further draw roller arrangement 23, which is constructed in the same way as the draw roller arrangement 17 and a uniformly controlled draw roller 23a and a pressure roller 23b pressing the web against this.
  • the web leaves the printing unit and is fed to further processing stations, for example another printing unit and then the cutting stations.
  • the transport device described is thus designed such that the paper web is continuously moved from its supply drum to the first paper web store 19 and behind the second paper web store 22, while the section of the web passing through the printing nip of the printing unit between the paper web stores in the so-called vocational step operation in a controlled manner. and being moved. He is briefly explained: As long as the rubber blankets 2a and 3a of the rubber cylinders 2 and 3 act on the web P and pinch them during printing, the web is transported by the two rotating rubber cylinders 2 and 3 and the pulling roller units 20 and 21 at the nip speed.
  • This vocational step operation is controlled in such a way that the printed images successively transferred to the paper web follow one another in order to save paper, and allows the printing format to be changed in a known manner, for example between the repeat lengths 605 mm and 685 mm measured in the transport direction, without to have to replace the cylinders. It is sufficient to suitably adjust the lengths by which the web is moved back and forth relative to the circumference of the moving rubber cylinders 2 and 3 during the pilgrim step operation and to program the control of the drives 20a and 21a accordingly.
  • the pull roller units 20, 21 are used simultaneously for register correction by regulating them as a function of read register marks or print marks, and for printing length correction by setting and maintaining a corresponding paper web stretch between the pull rollers 20b and 21b by regulating the web tension, which regulates the print length certainly.
  • FIGS. 2 to 7 show a preferred embodiment of the drawing roller 20b, 21b of a drawing roller unit 20, 21 designed as a suction roller.
  • the rotating part of this suction roller consists of a roller shell 61, which is made of a light carbon fiber reinforced plastic (CFRP), namely from Plastic impregnated carbon fibers, is produced and therefore has a relatively low rotational inertia. Since the suction roller must be repeatedly braked and accelerated strongly in a fraction of a second during vocational step operation, the lowest possible moment of inertia of the rotating part is desirable.
  • the roll shell 61 is shown as a single part, it typically has an overall axial length of about 100 cm and a diameter of about 15 cm.
  • the representations according to FIGS. 2 and 5 show how the interruptions indicate that the suction roll is shortened axially.
  • an outer ring flange 61a is formed on the roll shell 61, and the other end is tapered to form a connecting flange 61b.
  • the roller shell 61 is provided with a plurality of suction openings 62, the distribution of which will be explained later.
  • a flange part 63 preferably made of light metal, is fastened to the ring flange 61a by means of screws 64.
  • the roller shell 61 is rotatable about a solid, hollow roller core 65, preferably made of metal.
  • a metallic bearing journal 66 is fastened to the roll core 65, the base of which tightly closes the inside of the roll core 65.
  • two radial, preferably metal partitions 69 are fastened, which enclose a suction chamber 72 between them, as shown in particular in FIG.
  • ring walls 67 and 68 are fastened to the circumference of the roller core 65, which preferably also consist of metal and which close the suction chamber 72 on their axial sides.
  • the ring wall 68 at the end of the roller core 65 facing the flange part 63 is axially extended by an outstanding connecting piece 68b, which is used to fasten the stationary part of the suction roller to the machine frame and to connect to a vacuum source.
  • the peripheral wall of the roller core 65 is provided with relatively large passage openings 70 within the suction chamber 72. All parts 66, 67, 68, 69 fastened to the roller core 65 are welded in the example considered.
  • the roller shell 61 is at one end with its flange 63 by means of a bearing 71 'in the example considered as a bearing 71' on the socket 68b and at its other end with its connecting flange 61b by means of a bearing 71 also designed as a ball bearing mounted rotatably on the journal 66 of the roller core 65.
  • the arrangement is such that the gaps between the inner circumference of the roll shell 61 and the radially outer ends of the partition walls 69 and the outer circumference of the ring walls 67 and 68 are at least approximately sealed against air passage.
  • This sealing material 73 can in particular be a self-adhesive brush, for example.
  • the arrangement can also be such that only a very small gap is provided between the inner circumference of the roller shell 61 and the partition walls 69 and the ring walls 67 and 68, without the insertion of any special sealing material.
  • Such narrow gaps offer such high resistance to air passage that these gaps are sufficiently tight to maintain the required negative pressure within the suction chamber 72.
  • the connector 68b is constantly connected to a vacuum source, so that a sufficiently strong vacuum is maintained inside the roller core 65, by means of the openings 70, in the suction chamber 72 and consequently at the suction openings 62 opening into this suction chamber 72 which the paper web, which wraps around the suction roller in the area of the suction chamber 72 by 180 °, is pressed against the outer circumference of the roller shell 61, that is to say is held by strong suction.
  • the pressure inside the roller should be between 0.9 and 0.2 bar, depending on the type of paper.
  • a suitable surface treatment of the roll shell 61 makes this surface impact-resistant and abrasion-resistant and with a certain roughness Mistake; This ensures that even with the high accelerations of the suction roll occurring in vocational step operation, there is no slippage between the latter and the paper web, which therefore follows all movements of the suction roll.
  • the suction openings 62 are distributed in a certain manner, as shown in FIG.
  • FIG. 6 which shows part of the roll shell 61 developed in one plane
  • the suction openings 62 are arranged in zigzag lines lying parallel to one another, that is to say on the roll shell 61 in each case along helical line sections which run in a zigzag shape.
  • adjacent suction openings 62 are each arranged angularly and offset from one another parallel to the axis direction, the angular displacement in each case being 6 ° in the example under consideration.
  • successive suction openings are at an angle of 30 ° apart, and the distance between adjacent suction openings along a surface line, that is to say parallel to the axis, is approximately 5 cm in the example considered.
  • this results in a successive switch-off of the negative pressure at the end of the wrapping, so that the web detaches from the suction roll without any problems, and on the other hand, good web adhesion is guaranteed in the entire wrapping area on the suction roll.
  • the shape of the suction openings 62 is shown in the enlarged illustration according to FIG. 7, according to which the inner region of this suction opening consists of a cylindrical bore and the outer region consists of a conical widening.
  • a perfect balancing of the roller shell 61 is expediently achieved by making appropriately arranged and dimensioned bores 74 in the conical wall of the connecting flange 61b (FIGS. 2 and 5) and optionally in the annular flange 61a between the openings for the passage of the screws 64. If such bores are not sufficient, small pins can also be glued in on the opposite side to achieve perfect balancing.
  • the roller jacket 61 is pressed directly onto the shaft of the drive motor with its integrally formed connecting flange 61b.
  • FIGS. 8 and 9 schematically show a second exemplary embodiment of a pull roller according to the invention, in which suction effect and external overpressure are combined to press the paper web against the pull roller.
  • this pulling roller 30 is designed as a suction roller in exactly the same way as in the first exemplary embodiment according to FIGS. 2 to 7.
  • the roller shell 61 'provided with openings 62' thus sits with its conically tapering connecting flange 61b 'provided on one end in a rotationally fixed manner on the shaft 34 of the relevant drive motor of the drive 20a or 21a and is rotatably mounted at the other end with its flange part 63 'on the hollow axial connector 68b', which in turn is used for fastening and serves at the same time for connection to a suction air source 40 indicated by an arrow.
  • a suction chamber 72 ' is formed in the interior of the pull roller 30, as in the first exemplary embodiment according to FIG. 4, which is connected to the hollow connector 68b'.
  • the pull roller 30 dips with a segment, which is determined by the circumferential section wrapped by the paper web P, in the example under consideration with its upper half, into the open side of an otherwise closed box 37, which via an inlet connection 38 is indicated by an arrow Compressed air source 39 is connected.
  • the gap between the edges delimiting the box opening and the circumference of the roller jacket 61 ' is only dimensioned so large that the paper web P can pass this box 37 unhindered, but the excess pressure prevailing inside the box only escapes insignificantly through this column. Due to the arrangement described, the outside of the paper web P, which is subject to the internal suction effect, is simultaneously acted upon from the outside with compressed air in the region of the box 37. The combined suction and compressed air effect achieved in this way ensures particularly good adhesion of the paper web to the draw roller.
  • the draw roller can be used in other printing units with continuous paper web transport or with paper web transport in vocational step operation, especially in intaglio printing units.
  • the circumferential section of the draw roller wrapped around by the paper web can generally be between 90 ° and approximately 180 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Rotary Presses (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Unwinding Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (9)

  1. Unité de traction à rouleau pour le transport d'une nappe de papier (P) dans une machine d'impression à la bobine, comprenant, en tant qu'unique tambour, un tambour aspirant sur lequel s'enroule la nappe de papier (P) sur une partie déterminée de sa circonférence et qui est constitué d'un tambour intérieur fixe (65) sur lequel est monté rotativement un manteau (61) en matériau léger et pourvu d'orifices (62), manteau qui est monté rotativement par ses deux extrémités au moyen de paliers (71, 71') sur des prolongement axiaux cylindriques (66, 68b) du tambour intérieur (65), l'un de ces prolongements étant en forme d'embout creux (68b) pour le raccordement à une source de vacuum et qui sert de partie de fixation à un bâti de machine, l'extrémité du manteau (61) opposée à l'embout creux (68b) étant en forme de flasque conique (61b) pour la fixation directe à l'arbre du rotor d'un moteur d'entraînement et monté rotativement sur l'autre prolongement axial cylindrique du tambour intérieur (65) en forme de palier, une chambre d'aspiration (72) étant formée entre le manteau (61) et le tambour intérieur (65), cette chambre d'aspiration étant limitée par des parois radiales de séparation (69) fixées au tambour intérieur, ainsi que par des parois annulaires (67, 68) à ses extrémités axiales et contenant ladite partie de circonférence, le pourtour du tambour intérieur (65) présentant des orifices d'aspiration (70) dans la région de la chambre d'aspiration (72).
  2. Unité de traction selon la revendication 1, caractérisée en ce que le manteau de tambour (61) est en fibres de carbone imprégnées de matière synthétique.
  3. Unité de traction selon la revendication 2, caractérisée en ce que la surface du manteau de tambour (61) est revêtue d'une couche de plasma, par exemple de nickel.
  4. Unité de traction selon l'une des revendications 1 à 3, caractérisée en ce que le manteau de tambour (61) est monté rotativement sur ledit embout creux (68b) au moyen d'un flasque (63).
  5. Unité de traction selon l'une des revendications 1 à 4, caractérisée en ce que dans les espaces formés entre la paroi intérieure du tambour intérieur (61) et le pourtour des parois de séparation (69) et des parois annulaires (67, 68) est disposé un matériau d'étanchéité (73) en forme de brosses autocollantes.
  6. Unité de traction selon l'une des revendications 1 à 4, caractérisée en ce que les espaces formés entre la paroi intérieure du tambour intérieur (61) et la périphérie des parois de séparation (69) et des parois annulaires (67, 68), sont si petits qu'ils offrent à l'air une résistance suffisante au maintien de la dépression désirée dans la chambre d'aspiration (72), sans matériau d'étanchéité.
  7. Unité de traction selon l'une des revendications 1 à 6, caractérisée en ce que les orifices voisins (62, 62') dans le manteau de tambour (61, 61') sont décalés angulairement, de telle sorte que ces orifices sont situés le long de segments de lignes hélicoïdales disposés en zigzag.
  8. Unité de traction selon l'une des revendications 1 à 7, caractérisée en ce que le tambour aspirant est engagé par une partie s'étendant au dessus de la chambre d'aspiration (72') dans un caisson (37) autrement fermé dont l'intérieur est relié à une source d'air comprimé, de telle sorte que la surface du tambour aspirant engagée dans le caisson et soumis extérieurement à l'air comprimé et que les espaces entre les bords de l'ouverture du caisson et la surface du tambour sont juste suffisants pour que la nappe de papier s'enroulant sur le tambour puisse passer librement devant le caisson.
  9. Machine d'impression à la bobine à transport de la nappe de papier opérables au pas de pélerin, caractérisée en ce que pour le déplacement en avant et en arrière de la nappe de papier (P) devant la fente d'impression, la machine comprend un accumulateur de nappe (19) suivi d'une unité de traction (20) selon l'une des revendications 1 à 8 et, après la fente d'impression, une unité de traction (21) selon l'une des revendications 1 à 8 suivie d'un accumulateur de nappe (22), les deux unités de traction à tambour étant commandables chacune par un entraînement à réglage automatique (20a, 21a).
EP90810622A 1989-08-30 1990-08-17 Rouleaux tendeurs pour une machine rotative d'impression Expired - Lifetime EP0415882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3149/89 1989-08-30
CH314989 1989-08-30

Publications (3)

Publication Number Publication Date
EP0415882A2 EP0415882A2 (fr) 1991-03-06
EP0415882A3 EP0415882A3 (en) 1991-06-12
EP0415882B1 true EP0415882B1 (fr) 1994-11-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810622A Expired - Lifetime EP0415882B1 (fr) 1989-08-30 1990-08-17 Rouleaux tendeurs pour une machine rotative d'impression

Country Status (12)

Country Link
US (1) US5230456A (fr)
EP (1) EP0415882B1 (fr)
JP (1) JP2919026B2 (fr)
KR (1) KR0169473B1 (fr)
CN (1) CN1022303C (fr)
AT (1) ATE113531T1 (fr)
AU (1) AU631920B2 (fr)
CA (1) CA2022549C (fr)
DD (1) DD297368A5 (fr)
DE (1) DE59007617D1 (fr)
RU (1) RU1838150C (fr)
UA (1) UA18592A (fr)

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DE4240232C2 (de) * 1992-11-30 1995-04-27 Bhs Corr Masch & Anlagenbau Querschneider für Warenbahnen, insbesondere für eine Wellpappenbahn
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JP2919026B2 (ja) 1999-07-12
CN1050000A (zh) 1991-03-20
UA18592A (uk) 1997-12-25
KR910004353A (ko) 1991-03-28
DD297368A5 (de) 1992-01-09
CA2022549A1 (fr) 1991-03-01
EP0415882A2 (fr) 1991-03-06
KR0169473B1 (ko) 1999-05-01
AU6193190A (en) 1991-03-07
EP0415882A3 (en) 1991-06-12
CN1022303C (zh) 1993-10-06
ATE113531T1 (de) 1994-11-15
RU1838150C (ru) 1993-08-30
CA2022549C (fr) 2000-06-13
AU631920B2 (en) 1992-12-10
DE59007617D1 (de) 1994-12-08
JPH03118156A (ja) 1991-05-20
US5230456A (en) 1993-07-27

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