EP0922575B1 - Dispositif de guidage de feuilles dans une machine à imprimer - Google Patents

Dispositif de guidage de feuilles dans une machine à imprimer Download PDF

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Publication number
EP0922575B1
EP0922575B1 EP98121730A EP98121730A EP0922575B1 EP 0922575 B1 EP0922575 B1 EP 0922575B1 EP 98121730 A EP98121730 A EP 98121730A EP 98121730 A EP98121730 A EP 98121730A EP 0922575 B1 EP0922575 B1 EP 0922575B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
sheet guiding
printing
guide surface
guiding device
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
EP98121730A
Other languages
German (de)
English (en)
Other versions
EP0922575A2 (fr
EP0922575A3 (fr
Inventor
Edgar Dr. Dörsam
Marco Bergmann
Udo Trillig
Thomas Walther
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0922575A2 publication Critical patent/EP0922575A2/fr
Publication of EP0922575A3 publication Critical patent/EP0922575A3/fr
Application granted granted Critical
Publication of EP0922575B1 publication Critical patent/EP0922575B1/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
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • 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
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/113—Details of the part distributing the air cushion
    • B65H2406/1132—Multiple nozzles arrangement
    • B65H2406/11325—Adjustable impact angle

Definitions

  • the invention relates to a sheet guiding device in a printing press the preamble of the main claim.
  • blowing device It is in the conveying direction of the substrate in front of the printing nip of Blanket cylinder and impression cylinder arranged blowing device known from MAN Roland Druckmaschinen AG in the Roland 800 series, one Rotary printing machine based on the five-cylinder principle, from 1978 to 1995 was realized and sold.
  • This blowing device is a plurality of spaced apart in the cylinder axis length and the curvature of the cylinder surface adapted guide elements, each guide element has a hollow cylindrical cross section. Every guide element has obliquely arranged in the wall, against the pressure cylinder as well as the conveying direction of the printing material directed blow air openings, which prevent the sheet from lifting off the impression cylinder surface.
  • the interior of the hollow cylindrical guide element represents the blown air chamber which is coupled with a pneumatic system for the blower supply.
  • the Blowing air openings wall of the guide elements provides as an outer contour represents a guide surface which is adapted to the outer surface of the printing cylinder is. Furthermore, additional blown air openings are arranged that are transverse to the direction of movement viewed inward and in the edge area of the guide elements are directed outwards.
  • Execution according to DE 39 20 730 C2 uses a blowing nozzle that an air jet is directed towards the substrate and thereby achieves a spreading effect.
  • the Blower nozzle is in front of the printing nip parallel to the axis of the printing cylinder horizontal pendulum axis is pivotally mounted and can be coupled with a drive, which, in the work cycle of the printing press, the blowing nozzle swings in the conveying direction of the substrate back and forth.
  • the invention has for its object a sheet guiding device in a To create printing machine that avoids the disadvantages mentioned, in particular a more even guidance of the printing material on a sheet guiding cylinder, especially the printing cylinder, allowed and an improved enema of the substrate in a printing nip guaranteed.
  • the pneumatically actuated Sheet guiding device assumes that different in the area of the printing nip directed blast air flows act on the substrate surface. So is according to the invention in the conveying direction of the printing material before Blanket or form cylinders and sheet guide cylinders, e.g. the pressure cylinder, Formed pressure nip arranged a sheet guide device in which the kinetic energy of the blown air flow into the substrate Pressure energy is converted.
  • the sheet guide device points to the Underside of a guide surface with openings for the blowing air outlet.
  • Direction of funding of the printing material is the blowing air flow emerging from the openings adjustable in their direction to lift the sheet-shaped printing material from the outer surface of the sheet guide cylinder, here the impression cylinder, to prevent.
  • This enables the drag flow of the pumped Noticeably reduce the substrate and lift the substrate from the sheet guide cylinder to prevent suction.
  • a touch of the Top of the substrate with the blanket / form cylinder is excluded, so that, for example, damage to the printed image on the substrate is avoided.
  • An important advantage of the invention is that that the openings in the guide surface of the sheet guiding device can be directed and thus can be used to direct the blown air flow. So are preferred Blowing air flows in the guide surface at an angle and against the direction of movement of the substrate directionally adjustable. Blown air flows are also seen in the guide surface transverse to the conveying direction in the edge region of the guide surface against the direction of movement and inwards on the substrate straightenable to avoid a lateral escape of the blowing air. In another All blowing air flows in the guide surface are opposed to the conveying direction and directed inwards towards the substrate.
  • the sheet guiding device is arranged axially parallel to the sheet guide cylinder and extends preferably at least over the minimum format width.
  • the sheet guiding device is arranged in front of the printing nip in such a way that between the guide surface (underside) of the sheet guiding device and an inlet gap is formed on the lateral surface of the sheet guiding cylinder, which has a tapered course in the conveying direction towards the pressure gap.
  • the combination of directed pressure energy and tapered inlet gap the pressure gap enables the through the movement and speed of the Trailing flow caused on the substrate on the substrate surface to be reduced noticeably, so that a lifting of the printing material, in particular the trailing edge is prevented by a suction effect.
  • a further sheet guiding device arranged after the printing nip.
  • This sheet guiding device is preferred can be pneumatically acted upon and serves to guide the substrate when leaving of the pressure gap.
  • an outlet gap formed from the printing nip in the conveying direction of the substrate has a widening gap.
  • a sheet-fed rotary printing machine is shown in a row construction in accordance with FIG.
  • the last printing unit 1 is a Subordinate boom 2, which the printing material by means of sprocket shaft 5 and revolving chain systems 6 in the conveying direction 8 along sheet guiding device 7 transported and placed on a jib stack.
  • Each printing unit 1 exists in a known manner from a printing cylinder 10, a blanket cylinder 11 and a plate cylinder 24.
  • the plate cylinder 24 is an inking unit and possibly a Allocated to dampening system which will not be discussed further here.
  • one or more coating units can also be assigned to the printing units 1.
  • a coating unit is comparable to a printing unit 1.
  • the blanket cylinder 11 of the printing unit then corresponds, as is known, to the forme cylinder of the coating unit, the one with an applicator roller and a paint dosing system in functional connection is.
  • the printing cylinder 10 also takes over the function in the coating unit of the sheet guide cylinder.
  • Blanket cylinders or forme cylinders 11 and impression cylinders 10 form a printing gap 12 through which the sheet-like printing material is transported and printed or varnished in the printing on position.
  • the printing material lying on the outer surface of the printing cylinder 10 can pass through the printing gap 12 contactlessly to the blanket / form cylinder 11.
  • a sheet guiding device 9 is arranged in the conveying direction 8 in a first embodiment in front of the printing nip 12.
  • the sheet guiding device 9 preferably has an approximately wedge-shaped cross section and is coupled to a pneumatic system 21 for the blown air supply.
  • the sheet guiding device 9 projects into the gusset-shaped space of the printing nip 12, formed by blanket / form cylinder 11 and printing cylinder 10, and is formed with a chamber 13.
  • the chamber 13 serves to receive air which is supplied by the pneumatic system 21 for the blown air supply.
  • a guide surface 19 on the underside of the sheet guiding device 9 or the chamber 13 has a large number of cutouts into which hollow cylinders 20 with openings 16 are inserted.
  • Each hollow cylinder 20 is connected at one end (base surface) to the guide surface 19 in a positive or non-positive manner and projects with its other end (cover surface) into the chamber 13.
  • Each hollow cylinder 20, each with an opening 16, represents the blown air opening, which is adjustable in the direction of flow.
  • Each hollow cylinder 20 preferably has a defined height which is in a ratio of 3 3: 1 to the cross section of the opening 16.
  • the height which is at least three times greater than the opening 16 increases the proportion of laminar flow in the blown air. It has been shown that the laminar flow positively supports the smooth placement and spreading of the printing material on the jacket of the printing cylinder 10.
  • each hollow cylinder 20 is essentially as a guide surface 19 straight hollow cylinder 20 arranged.
  • the hollow cylinders 20 are preferably in their Flow direction adjustable in that the hollow cylinder 20 a blown air flow in the opposite direction to the conveying direction 8 of the printing material produce.
  • the chamber 13 with a feed line to the pneumatic system 21 in functional connection, via which the blown air is supplied.
  • the hollow cylinder 20 with their blowing air flow direction obliquely against Direction of conveyance 8 of the printing material directed to lift off the outer surface to prevent the sheet guiding cylinder (impression cylinder 10).
  • In this Location is the set hollow cylinder 20 to the guide surface 19 a slate Hollow cylinder 20.
  • Each hollow cylinder 20 is in its own or in groups Position adjustable.
  • Hollow cylinders 20 which approximately are directed perpendicular to the sheet-guiding pressure cylinder 10, with others Hollow cylinders 20, which are directed obliquely against the conveying direction 8 for a the printing substrate lies flat on the outer surface of the printing cylinder 10 advantageous.
  • the hollow cylinders 20 directed obliquely against the conveying direction 8 are in turn adjustable at different angles of inclination.
  • the sheet guiding device 9 is arranged over the length of the sheet guiding cylinder (printing cylinder 10) at least in a partial area of the lateral surface of the printing cylinder 10.
  • the sheet guiding device 9, as seen over the length of the sheet guiding cylinder 10, is adjustably mounted on a cross-member fixed to the frame, several adjacent sheet guiding elements 9 being displaceable and fixable on the cross member.
  • the sheet guiding device 9 extends at least over the minimum format width and is mounted in swivel joints 25 fixed to the frame and can be pivoted about its axis. In order to obtain the desired flow direction, each hollow cylinder 20 can be brought into the desired flow direction at its end facing away from the guide surface 19 and remains self-locking in this position.
  • the sheet guiding device 9 shows a lower part 17 and an upper part 18 as a housing, which are detachably connected to one another and form the pneumatically actuated chamber 13.
  • the guide surface 19 is part of the lower part 17 and receives the hollow cylinder 20 in the cutouts.
  • a hollow cylinder 20 is shown, which is shown with dashed lines as a straight hollow cylinder 20 (to the guide surface 19). The position is shown with solid lines as an oblique hollow cylinder 20.
  • Each hollow cylinder 20 in turn has the opening 16 for the blowing air outlet.
  • the oblique hollow cylinders 20 are inclined in the opposite direction to the conveying direction 8, so that the blown air flow is directed obliquely at the printing material lying on the outer surface of the printing cylinder 10.
  • the hollow cylinder 20 are, for. B. provided with a collar 22 which protrudes from the guide surface (19) (Fig. 4a).
  • Fig. 4a the guide surface (19)
  • Fig. 4b and 4c since the collar 22 no longer protrudes from the guide surface 19, but is integrated flush (Fig. 4c) or embedded (Fig. 4b).
  • Each hollow cylinder 20 is functionally connected directly to the pneumatic system 21, so that the openings 16 can be supplied with blown air.
  • the chamber 13 is coupled to the pneumatic system 21, so that the Openings 16 can be supplied with blown air from the chamber 13.
  • the sheet guiding device 9 is formed from a plurality of chambers 13, 14, 15, which are functionally connected to the pneumatic system 21.
  • the chambers 13-15 receive the blown air and in turn have the hollow cylinders 20 with openings 16 for the blown air outlet in the guide surface 19.
  • the blown air flows have the same or different printing energies impinging on the printing material.
  • the upper part 18 can preferably be detached from the lower part 17, so that the hollow cylinder 20 can be adjusted obliquely against the printing material 8 manually or by means of actuating devices and can be held in its position.
  • Another sheet guiding device 9 is arranged in the conveying direction 8 after the printing nip 12 as a mirror image of the sheet guiding device 9 arranged in front of the printing nip 12, an outlet gap 26 being formed between the guiding surface 19 and the lateral surface of the printing cylinder 10, which is widening in the conveying direction 8 from the printing nip 12 is.
  • the hollow cylinders 20 with openings 16 are in turn directed against the conveying direction 8 at the printing material.
  • the chamber 13 adjacent to the printing nip 12 has at least one opening 16, the blown air flow of which is directed in front of the printing nip 12 against the rubber blanket / forme cylinder 11 and deflects the printing material deflected therefrom against the conveying direction 8.
  • the already set hollow bodies 20 can be adjusted in their angle of inclination against the conveying direction 8 of the printing material, so that it lies optimally on the lateral surface of the printing cylinder 10 during sheet transport.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (4)

  1. Dispositif de guidage de feuilles dans une machine d'impression, qui est agencé, dans la direction de transport de la matière d'impression, dans l'espace en forme de coin au moins avant une fente d'impression formée par un cylindre porte-cliché et un cylindre de guidage de feuilles, parallèlement à l'axe par rapport à un cylindre de guidage de feuilles, et est couplé à un système pneumatique pour l'alimentation en air, ayant une surface de guidage présentant des ouvertures pour l'application de la matière d'impression sur la surface d'enveloppe associée au moyen d'air de soufflage,
    caractérisé en ce que :
    la surface de guidage (19) voisine du cylindre de guidage de feuilles (10) présente des cylindres creux intégrés (20) ayant des ouvertures (16) se trouvant en liaison fonctionnelle avec un système pneumatique (21) pour la sortie de l'air de soufflage,
    chaque cylindre creux (20) est relié, à une extrémité, à la surface de guidage (19) sous l'influence d'une force ou par coopération de formes et, à l'extrémité libre, sa position peut être réglée pour obtenir une direction d'écoulement définie de l'air de soufflage sortant de l'ouverture (16), et
    la surface de guidage (19) forme, avec le cylindre de guidage de feuilles (10), une fente d'entrée (23) qui est agencée en se rétrécissant, dans la direction de transport (8), vers la fente d'impression (12).
  2. Dispositif de guidage de feuilles selon la revendication 1,
    caractérisé en ce que la surface de guidage (19) fait partie d'au moins une chambre (13, 14, 15), qui est couplée au système pneumatique (21) et présente une partie inférieure (17) ainsi qu'une partie supérieure (18) reliée de façon amovible.
  3. Dispositif de guidage de feuilles selon les revendications 1 et 2,
    caractérisé en ce que la chambre (13) présente au moins une ouverture (16), dont l'écoulement de l'air de soufflage est orienté, avant la fente d'impression (12), contre le cylindre porte-blanchet/porte-cliché (11).
  4. Dispositif de guidage de feuilles selon la revendication 1,
    caractérisé en ce que chaque cylindre creux (20) possède une hauteur qui, par rapport à la section transversale de l'ouverture (16) présente un rapport de ≥ 3:1.
EP98121730A 1997-11-29 1998-11-14 Dispositif de guidage de feuilles dans une machine à imprimer Expired - Lifetime EP0922575B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29721184U DE29721184U1 (de) 1997-11-29 1997-11-29 Bogenführungseinrichtung in einer Druckmaschine
DE29721184U 1997-11-29

Publications (3)

Publication Number Publication Date
EP0922575A2 EP0922575A2 (fr) 1999-06-16
EP0922575A3 EP0922575A3 (fr) 1999-06-30
EP0922575B1 true EP0922575B1 (fr) 2002-04-10

Family

ID=8049310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121730A Expired - Lifetime EP0922575B1 (fr) 1997-11-29 1998-11-14 Dispositif de guidage de feuilles dans une machine à imprimer

Country Status (3)

Country Link
EP (1) EP0922575B1 (fr)
AT (1) ATE215885T1 (fr)
DE (2) DE29721184U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7456143B2 (en) 2002-12-20 2008-11-25 Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) Bleach-containing washing or cleaning agents containing a sulfate/silicate coated percarbonate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829095C2 (de) * 1998-06-30 2002-04-25 Roland Man Druckmasch Bogenführungseinrichtung in einer Druckmaschine
DE19905095C2 (de) * 1999-02-09 2001-02-22 Roland Man Druckmasch Bogenführungseinrichtung für eine Druckmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920730A1 (de) * 1989-06-24 1991-01-10 Heidelberger Druckmasch Ag Vorrichtung zur bogenglaettung am druckzylinder in einer bogenrotationsdruckmaschine
DE4217813C2 (de) * 1992-05-29 1996-06-05 Heidelberger Druckmasch Ag Vorrichtung zum Erzielen einer flächigen Anlage von Bedruckstoffen
DE19523072C2 (de) * 1995-06-24 2003-12-04 Heidelberger Druckmasch Ag Bogenblaseinrichtung für eine Druckmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7456143B2 (en) 2002-12-20 2008-11-25 Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) Bleach-containing washing or cleaning agents containing a sulfate/silicate coated percarbonate

Also Published As

Publication number Publication date
DE29721184U1 (de) 1998-01-15
EP0922575A2 (fr) 1999-06-16
DE59803714D1 (de) 2002-05-16
EP0922575A3 (fr) 1999-06-30
ATE215885T1 (de) 2002-04-15

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