EP1124689B1 - Systeme de guidage de feuilles dans une machine a imprimer - Google Patents

Systeme de guidage de feuilles dans une machine a imprimer Download PDF

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Publication number
EP1124689B1
EP1124689B1 EP99971374A EP99971374A EP1124689B1 EP 1124689 B1 EP1124689 B1 EP 1124689B1 EP 99971374 A EP99971374 A EP 99971374A EP 99971374 A EP99971374 A EP 99971374A EP 1124689 B1 EP1124689 B1 EP 1124689B1
Authority
EP
European Patent Office
Prior art keywords
air
flow channel
pneumatic system
sheet
sheet guiding
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.)
Revoked
Application number
EP99971374A
Other languages
German (de)
English (en)
Other versions
EP1124689A1 (fr
Inventor
Peter Wulf
Peter Michel
Petra Franz
Stefan Hartmann
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8064644&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1124689(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1124689A1 publication Critical patent/EP1124689A1/fr
Application granted granted Critical
Publication of EP1124689B1 publication Critical patent/EP1124689B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/102—Combinations of transfer drums and grippers with pneumatic means

Definitions

  • the invention relates to a sheet guiding device in a Printing machine according to the preamble of the main claim.
  • a sheet guiding device of this type is known from EP 0 156 173 B1 for guiding sheet-shaped sheets printed on one or both sides Media known.
  • This guide is through modularly arranged flow channels, which openings have as air nozzles in a guide surface.
  • the Flow channels have a plurality of fans for the Supply of blown air or suction air.
  • a blower or suction box has the guide surface as a top surface and is connected to a blower or suction air source by means of blower or suction air nozzles.
  • Flow resistance-forming bodies protrude from the top surface into the blow / suction box.
  • the flow resistance of the above-mentioned bodies in the blowing / suction box decreases.
  • the disadvantage here is that, particularly in blown air operation, this arrangement of the flow resistance-forming bodies causes turbulence in the area of the through openings, which can lead to an unstable arc run.
  • the invention has for its object a sheet guiding device to create in a printing press that named Avoids disadvantages, especially in blown air operation and safe sheet guidance is also permitted in suction air mode and noticeably reduced the occurrence of turbulence.
  • the task is based on the training features of the main claim solved. Further training results from the subclaims.
  • a first advantage of the invention is that the sheet-carrying printing material in blown air and suction air mode the sheet guiding device safely and evenly without greasing is feasible.
  • the sheet guide device according to the invention are turbulences in the range of air flow Avoidable openings, so that in blown air mode one of these openings with a substantially uniform Pressure distribution emerging stable flowing air cushion between the guiding surface of the sheet guiding device and forms one side of the sheet-shaped printing material.
  • the risk of greasing is reduced as this is preferred diffusely flowing air cushions with a substantially more uniform Pressure distribution leads the substrate.
  • the sheet guide device too can be operated in suction air mode. This is an even one Sucking up the preferably unprinted side of the printing material towards the guiding surface of the sheet guiding device realizable.
  • the sheet guiding device is supplied with air by a preferably switchable adjustable pneumatic system, which a central blown air or suction air supply is permitted. Alternatively, their direction of rotation can be switched, speed-adjustable fans can be used.
  • the sheet guiding device is in the printing press the sheet transport systems, preferably gripper bars on the sheet guide cylinders (System drum, transfer cylinder, impression cylinder and turning system) and in the boom in a defined Distance straight or curved adjacent.
  • this sheet guide is below as well above sheet-guiding cylinders and drum or rotating ones Conveyor systems can be arranged.
  • Another advantage of the sheet guiding device is that justifies that a pulse current distribution by means of directional elements or pressure distribution over the sheet-guiding surface can be influenced in a targeted manner.
  • This enables the each pneumatic system selectively into a flow channel introduced air in its pressure distribution within the Flow channel become more uniform, leading to a calming of the sheet run.
  • an air permeable Training e.g. a perforation that will be straightening elements possible recirculation areas of the air flow are suppressed and achieved a calming of the flow in the flow channel.
  • By taking into account the blowing or suction direction of the pneumatic system inclined arrangement of the straightening elements (or their subsections) are through the use air-permeable materials, such as. B. more perforated Materials, shadows of the currents in the flow channel reduced. This also leads to an even pressure distribution in the flow channel.
  • the guiding surface of the sheet guiding device is air-permeable Guide surface with air to flow through Through openings formed.
  • air-permeable Guide surfaces are preferably diffuse on the bottom and / or top of an arcuate printing material acting currents can be generated in the form of blown air or suction air.
  • a rotary printing press in series construction has one A plurality of printing units 11 for multi-color offset printing.
  • each Printing unit 11 is through a plate cylinder 1, a blanket cylinder 3 and a sheet guide cylinder, here as Designated pressure cylinder 4, formed.
  • Each plate cylinder 1 an inking unit and possibly a dampening unit are assigned.
  • Between the printing units 11 are one or several turning systems 13 (e.g. as a single drum or three drum application) and transfer cylinder 14 arranged.
  • the last printing unit 11 (or one Coating unit) a boom 12 downstream.
  • the boom 12 has an endless circulating conveyor system 16, e.g. as a chain drive with a sprocket shaft 15 on.
  • the sheet guiding cylinders System drum, turning system 13, transfer cylinder 14, printing cylinder 4) and the conveyor system 16 are defined in Distances assigned sheet guide devices 7 adjacent.
  • These sheet guiding devices 7 are in a modular arrangement arranged several times in a row and extend across the maximum format width of the sheet-shaped printing material 18.
  • the sheet guiding devices 7 have guide surfaces 8 which are provided with openings through which air can flow.
  • Each guide surface 8 forms a continuous (straight and / or curved) plane for guiding the printing material 18.
  • the sheet guiding devices arranged in a modular design 7 are preferably by a plurality of guide modules 5,9 educated.
  • the control module 5 preferably for an arrangement below the conveyor level of the Printing material and the control module 9 for an arrangement above the conveying level of the substrate.
  • the basic structure is the same in both training courses.
  • everyone Control module 5.9 each has a flow channel 17, which with the guide surface 8 and a pneumatic system 10 for each the blown air or suction air supply in functional connection is.
  • the pneumatic system 10 is, for example, the central one Air supply or through a plurality of on the rear wall the flow channels 17 arranged fans can be realized.
  • the Guide surface 8 is preferably connected to flow channel 17 releasably connected and forms the sheet-shaped printing material 18 assigned top surface of the flow channel 17.
  • At least one straightening element is located within the flow channel 17 6 arranged associated with at least one pneumatic system 10.
  • the straightening element is shown in FIG. 2 6 as extending within the flow channel 17 Perforated sheet formed, which the pneumatic system 10th is assigned adjacent.
  • the perforated plate shows a constant hole pattern.
  • the hole pattern is also varying, i.e. the air flow openings are in Size and distance different, can be trained.
  • the straightening element 6 is as centric and / or concentric to the pneumatic system 10 formed adjacent air guide surface.
  • the Air guiding surfaces of the straightening elements 6 are flat and / or curved executable. The distances are between two straightening elements 6 A1, A2 of the air guiding surfaces with each other with increasing Distance from the pneumatic system 10 is larger (A2> A1).
  • the air guiding surfaces can also be surfaces with the pneumatic system Form 10 distant trailing edges.
  • the air guiding surfaces of the straightening elements are also a further development 6 with openings (e.g. holes, slots, pores a porous material), which can be flowed through by air are.
  • hood-shaped attachment with air-permeable openings (e.g. Holes, slots, pores) of the respective pneumatic system 10 assigned.
  • the hood-shaped attachment forms a chamber within the flow channel 17, the air in the blown air mode flows out of the hood surface. In suction air mode the air above the hood surface becomes a pneumatic system 10 sucked in.
  • 2 to 4 are, for example, for an arrangement of guide modules 5 for below sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 used.
  • a Guide module 9 shown which above sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 can be used is.
  • This is the inside of a flow channel 17 Pneumatic system 10 associated straightening element 6 as a perforated plate educated.
  • the hole pattern of the perforated plate is constant or can be trained in various ways as already described.
  • the extension the perforated plate is limited, however, so that of the Pneumatic system 10 most distant part of the guide surface 8 always sufficiently supplied with air, preferably with blown air is.
  • the straightening elements 6 described serve in the flow channel 17 the generation of a for the respective operating mode (fine print, Perfecting) favorable, even pressure distribution (Pulse current distribution) over the entire guide surface 8.
  • the punctual by the or the pneumatic systems 10 introduced into the flow channel 17 during blown air operation Air flow is specifically directed by means of straightening elements 6, to ensure safe sheet guidance. Also in suction air mode is sucked into the flow channel 17 Targeted air, resulting in a stable, calm curve causes. Disruptive recirculation currents or shading effects through the directional elements 6 are through the Arrangement and design of the straightening elements 6, in particular through air flow, e.g. perforated or porous, Avoidable openings.
  • the flow introduced by the pneumatic system 10 is directed in a targeted manner in the blown air mode and distributed within the flow channel 17.
  • Printing materials 18 with the printed or lacquered side facing the sheet guiding device 7 can thus be guided in a stable, lubrication-free manner.
  • the suction air mode the flow extracted by the pneumatic system 10 is selectively distributed beforehand within the flow channel 17.
  • the openings in the respective straightening element 6 prevent the flow at the guide surface edges from becoming detached and from forming recirculation areas which interfere with the pressure distribution.
  • the penetration resistance can be varied by the type (size, distance) of the openings on the straightening element 6.
  • the suction air operation can be carried out in a stable manner, in particular for printing substrates 18 with an unprinted or unpainted side facing the sheet guide device 7.
  • FIGS. 3 and 4 only on the left directional elements 6 the pulse flow indicated by arrows.
  • the mode of action is as follows:
  • the sheet-shaped printing material 18 passes through the printing units 11, possibly coating units, in the conveying direction 2 or processing stations and is in the boom 12 placed on a stack.
  • the Guide modules 5.9 of the sheet guide device 7 pneumatically acted upon.
  • the sheet-shaped printing material 18 is over the format evenly on the preferably diffuse flowing Air cushion led. Be through this stable flow Vacuum zones, the fluttering of the sheet-shaped substrate 18 favor avoided.
  • the sheet guide device 7 can also be operated in suction air mode.
  • the Sheet guiding device 7 is not on one side Allocation from to substrate 18 (top or bottom) limited. Rather, it is also bilateral Assignment to printing material 18 possible.
  • the guide surface 8 is detachable with the Flow channel 17 connected.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Screen Printers (AREA)

Claims (7)

  1. Dispositif de guidage de feuilles dans une machine d'impression, comportant un canal d'écoulement et une surface de guidage, des ouvertures étant agencées dans la surface de guidage, qui, au moyen d'un système pneumatique, peuvent être alimentées en air de soufflage et en air d'aspiration,
    caractérisé en ce que le dispositif de guidage de feuilles (7) est formé d'au moins un module de guidage (5, 9), en ce que chaque module de guidage (5, 9) présente un canal d'écoulement (17) se trouvant en liaison fonctionnelle avec la surface de guidage (8) et le système pneumatique (10), et en ce qu'au moins un élément d'orientation (6) agencé à l'intérieur du canal d'écoulement (17) est associé à un système pneumatique (10), de sorte que le courant d'air amené dans le canal d'écoulement(17) au moyen du système pneumatique (10) est orienté contre la surface de guidage (8) comme une répartition de pression uniforme à l'intérieur du canal d'écoulement (17).
  2. Dispositif de guidage de feuilles selon la revendication 1,
    caractérisé en ce que le dispositif de guidage de feuilles (7) formé par au moins un module de guidage (5, 9) présente, à l'intérieur du canal d'écoulement (17), au moins un élément d'orientation (6) associé au système pneumatique (10), pour amener, en fonctionnement d'air d'aspiration, un courant d'air aspiré de façon uniforme dans le canal d'écoulement (17) de façon ponctuelle au système pneumatique (10).
  3. Dispositif de guidage de feuilles selon au moins la revendication 1,
    caractérisé en ce que l'élément d'orientation (6) est une tôle de guidage d'air ayant des ouvertures pouvant être traversées par l'air.
  4. Dispositif de guidage de feuilles selon au moins la revendication 1,
    caractérisé en ce que la configuration de perçage des ouverture de l'élément d'orientation (6) est constante ou varie.
  5. Dispositif de guidage de feuilles selon au moins la revendication 1,
    caractérisé en ce que les éléments d'orientation (6) sont associés de façon centrée et/ou concentrique au système pneumatique (10), la distance (A2) à un bord d'écoulement étant plus grande par rapport à la distance (A1) au niveau du système pneumatique voisin (10), entre deux éléments d'orientation (6).
  6. Dispositif de guidage de feuilles selon au moins la revendication 1,
    caractérisé en ce que l'élément d'orientation (6) est associé au système pneumatique (10) sous forme de capot ayant des ouvertures pouvant être traversées par de l'air.
  7. Dispositif de guidage de feuilles selon au moins la revendication 1,
    caractérisé en ce que la surface de guidage (8) est reliée de façon amovible au canal d'écoulement (17).
EP99971374A 1998-10-30 1999-10-02 Systeme de guidage de feuilles dans une machine a imprimer Revoked EP1124689B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29819402U 1998-10-30
DE29819402U DE29819402U1 (de) 1998-10-30 1998-10-30 Bogenleiteinrichtung in einer Druckmaschine
PCT/EP1999/007318 WO2000026031A1 (fr) 1998-10-30 1999-10-02 Systeme de guidage de feuilles dans une machine a imprimer

Publications (2)

Publication Number Publication Date
EP1124689A1 EP1124689A1 (fr) 2001-08-22
EP1124689B1 true EP1124689B1 (fr) 2002-07-24

Family

ID=8064644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99971374A Revoked EP1124689B1 (fr) 1998-10-30 1999-10-02 Systeme de guidage de feuilles dans une machine a imprimer

Country Status (8)

Country Link
US (1) US6726203B1 (fr)
EP (1) EP1124689B1 (fr)
JP (1) JP2002528362A (fr)
CN (1) CN1131778C (fr)
AT (1) ATE220995T1 (fr)
CZ (1) CZ295070B6 (fr)
DE (2) DE29819402U1 (fr)
WO (1) WO2000026031A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910416B2 (en) 2002-12-12 2005-06-28 Heidelberger Druckmaschinen Ag Suction guidance device for a single-drum turner

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20002090U1 (de) * 2000-02-05 2001-06-21 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogenführungseinrichtung in einer Druckmaschine
DE10100198A1 (de) † 2001-01-04 2002-07-11 Koenig & Bauer Ag Bogenleiteinrichtung in Druckmaschinen
DE10233097B4 (de) * 2002-07-20 2010-02-25 Koenig & Bauer Aktiengesellschaft Bogenführungseinrichtung in einer Druckmaschine
DE10331626B3 (de) * 2003-07-12 2005-01-13 Nexpress Solutions Llc Bedruckstoffführung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592329A (en) * 1966-10-27 1971-07-13 Gen Logistics Differential pressure conveyors
DE3411029A1 (de) 1984-03-24 1985-10-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum fuehren von ein- und beidseitig bedruckten bogen
US5133255A (en) * 1990-12-31 1992-07-28 Howard W. DeMoore Vacuum transfer apparatus for rotary sheet-fed printing presses
DE4106904A1 (de) * 1991-03-05 1992-09-10 Koenig & Bauer Ag Duesenanordnung fuer die bogenfuehrung in bogenrotationsdruckmaschinen
DE4244499C2 (de) 1992-12-30 1995-04-06 Heidelberger Druckmasch Ag Druckmaschine mit bogenführender Fläche
US5634636A (en) * 1996-01-11 1997-06-03 Xerox Corporation Flexible object handling system using feedback controlled air jets
US5839722A (en) * 1996-11-26 1998-11-24 Xerox Corporation Paper handling system having embedded control structures
DE19701230C1 (de) * 1997-01-16 1998-02-19 Roland Man Druckmasch Pneumatische Bogenleiteinrichtung in einer Druckmaschine
EP0899228B1 (fr) * 1997-08-28 2004-04-14 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de guidage à coussin d'air
DE19829094C2 (de) * 1998-06-30 2002-10-24 Roland Man Druckmasch Leiteinrichtung für bogenförmige Bedruckstoffe in einer Druckmaschine
US6170819B1 (en) * 1998-08-05 2001-01-09 Baldwin Graphic Systems, Inc. Non-contact sheet handling system and method of using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910416B2 (en) 2002-12-12 2005-06-28 Heidelberger Druckmaschinen Ag Suction guidance device for a single-drum turner

Also Published As

Publication number Publication date
CN1325344A (zh) 2001-12-05
CN1131778C (zh) 2003-12-24
WO2000026031A1 (fr) 2000-05-11
DE29819402U1 (de) 1999-03-11
JP2002528362A (ja) 2002-09-03
US6726203B1 (en) 2004-04-27
CZ20011519A3 (cs) 2001-12-12
CZ295070B6 (cs) 2005-05-18
DE59902146D1 (de) 2002-08-29
ATE220995T1 (de) 2002-08-15
EP1124689A1 (fr) 2001-08-22

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