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EP0701958A1 - Device for guiding a sheet - Google Patents

Device for guiding a sheet Download PDF

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Publication number
EP0701958A1
EP0701958A1 EP95112286A EP95112286A EP0701958A1 EP 0701958 A1 EP0701958 A1 EP 0701958A1 EP 95112286 A EP95112286 A EP 95112286A EP 95112286 A EP95112286 A EP 95112286A EP 0701958 A1 EP0701958 A1 EP 0701958A1
Authority
EP
European Patent Office
Prior art keywords
sheet
air
guideway
guide surface
blowing
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.)
Granted
Application number
EP95112286A
Other languages
German (de)
French (fr)
Other versions
EP0701958B1 (en
Inventor
Manfred Henn
Josef Wehle
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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
Priority claimed from DE19524641A external-priority patent/DE19524641A1/en
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0701958A1 publication Critical patent/EP0701958A1/en
Application granted granted Critical
Publication of EP0701958B1 publication Critical patent/EP0701958B1/en
Anticipated expiration legal-status Critical
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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/245—Air blast devices
    • 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 guide device for a sheet which may be freshly printed on both sides, the front edge of which is guided by means of a gripper device carried by transport means in a sheet running direction perpendicular to the front edge along an imaginary guideway, with a sheet guiding surface spaced from the guideway, a first sheet surface facing the sheet guiding surface of the arc is exposed to an air flow which is formed by means of blowing air which emerges from a plurality of first nozzle openings of first blowing nozzles in the arc guide surface.
  • a guide device of the type mentioned is known for example from JP 3-7149 U.
  • a chain delivery of a sheet-fed rotary printing machine is disclosed therein, in which a leading edge of a printed sheet is temporarily clamped in a gripper device, which is articulated on an endless chain of a pair of chains rotating in parallel tracks, so that the leading edge of the sheet has an imaginary guide surface along one to the leading edge vertical direction of sheet swept.
  • a gripper device Provided at a respective distance from locations on the guide surface is an arc guide surface in the form of a surface of a guide plate.
  • a respective sheet is exposed to an air flow between the sheet and the sheet guide surface on its path forced by the gripper device. This air flow is generated by means of individual air jets that emerge from the sheet guide surface.
  • the invention has for its object to provide a guide device of the type mentioned, which enables a lubrication-free sheet run.
  • the air flow has a main flow direction, which can be described by means of a first directional arrow running parallel to the sheet running direction and pointing in the sheet running direction, that a second sheet surface of the sheet facing away from the sheet guide surface is acted upon by a plurality of air jet bundles, a respective one this air jet bundle emerging from a second nozzle opening of a respective second blowing nozzle has a main flow direction, which can be described by means of a second directional arrow running in a plane perpendicular to the front edge of the arc, that the first and second directional arrows form an angle when they are approached at a common starting point , the greatest value of which is 90 °, and that an imaginary, penetrating extension of the central jet of a respective bundle of air jets in the case of e
  • the main flow direction of the air jet bundle which is inclined with respect to the guide path, essentially meets one of the first nozzle openings in the sheet guiding surface.
  • a layer of air is formed on the underside of the sheet by means of the air flow of the first blowing nozzles essentially in the direction of sheet travel.
  • the top of an arc impinging bundles of air jets together with the air layer, form an air cushion arrangement which surrounds the respective arc and guides along the guideway without fluttering and without contact. This guarantees smear-free sheet travel even for freshly printed sheets on both sides.
  • the arc run is sufficiently smooth for straight printing.
  • the second blowing nozzles and optionally the first blowing nozzles are designed to be adjustable in their blowing direction.
  • the second blowing nozzles can be aligned in such a way that the angle enclosed between the first and the second directional arrows can be set to values between 90 ° and approximately 20 °.
  • the section of a delivery arm of a sheet-fed printing machine has a guide device 2 which serves to guide printed sheets 1 which, coming from a delivery drum 3, pass through a guide path 4 of the delivery arm and are fed to a stacking table, not shown.
  • the sheet 1 is transported by means of a gripper device 5, which grips the front edge of the respective sheet 1 detected.
  • the gripper device 5 is arranged on circumferential, guided chain runs, as a result of which the guide track 4 is formed.
  • a sheet guiding surface 6 runs parallel to the guideway 4 and at a distance therefrom, into which a plurality of first blowing nozzles 7 are inserted, preferably flush with the sheet guiding surface 6.
  • the first blowing nozzles 7 have first nozzle openings 7 '.
  • Blown air 8 emerges from the first blowing nozzles 7 in such a way that an air flow 8 ′ is formed, the main flow direction of which points in the direction of the sheet travel.
  • the direction of sheet travel is indicated with the aid of a first directional arrow 9; it corresponds to the course of the guideway 4.
  • the blowing air 8 acts in each case on a first sheet surface of the sheets 1 gripped by the gripper device 5, the first sheet surface facing the sheet guide surface 6.
  • the delivery has a drying device 12.
  • This can emit infrared and / or ultraviolet radiation, which means that appropriately sensitized printing inks can be dried as quickly as possible.
  • this drying device 12 has a so-called air knife, that is, it emits an air flow 13 which forms a second air supply with regard to the above-mentioned blowing air 8. It results from a plurality of air jet bundles 14 emerging from second nozzle openings 15 ′ from second blowing nozzles 15. Like the first blowing nozzles 7, the second blowing nozzles 15 are distributed in the longitudinal and transverse directions of the boom. The second blowing nozzles 15 belong to the drying device 12.
  • Blow air drying leads to physical drying of printing ink Bogen 1, whereby support by means of IR or UV radiation, as mentioned, may be present, but is not mandatory. If necessary, the air flow 8 'can also be formed on the underside of the sheet by means of hot air. The drying effect which occurs in addition to the function of guiding the sheet 1 occurs to an increased extent when the main flow direction of the air jet bundles 14 is oriented perpendicularly with respect to the guideway.
  • a second directional arrow 16 which represents the main flow direction of a respective bundle of air jets 14, lies in a plane perpendicular to the front edge of the arc 1.
  • the second blowing nozzles 15 can be aligned in such a way that the angle alpha enclosed between the first and the second directional arrows 9 and 16 assumes values between 90 ° and approximately 20 °.
  • an embodiment is shown with a main flow direction of the air jet bundle 14 which is inclined with respect to the guideway 4.
  • the air jet bundles 14 are aligned in such a way that an imaginary extension of the central jet 16 of a respective air jet bundle 14 essentially meets a respective one of the first nozzle openings 7 '.
  • the alignment of the second blowing nozzles 15 is carried out in stages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Discharge By Other Means (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Ink Jet (AREA)

Abstract

The guide device is for a sheet (1) just printed on both sides, taking it along a guide path (4), where it is subjected to an air stream (8') from jet apertures (7). The air stream has a main flow direction which can be described by a first direction arrow (9) parallel to the sheet running direction and pointing in the sheet running direction. The second surface of the sheet, facing away from the sheet guide surface (6), is subject to numerous air jet clusters (14). These come from a second jet aperture (15'), and have a main flow direction which can be described by a second direction arrow (16) in a plane perpendicular to the front edge of the sheet.

Description

Die Erfindung betrifft eine Leiteinrichtung für einen gegebenenfalls beidseitig frisch bedruckten Bogen, dessen Vorderkante mittels einer von Transportmitteln getragenen Greifereinrichtung in einer zu der Vorderkante senkrechten Bogenlaufrichtung entlang einer gedachten Führungsbahn geführt ist, mit einer von der Führungsbahn beabstandeten Bogenleitfläche, wobei eine der Bogenleitfläche zugewandte erste Bogenoberfläche des Bogens einer Luftströmung ausgesetzt ist, die mittels Blasluft gebildet ist, welche aus einer Mehrzahl von ersten Düsenöffnungen erster Blasdüsen in der Bogenleitfläche austritt.The invention relates to a guide device for a sheet which may be freshly printed on both sides, the front edge of which is guided by means of a gripper device carried by transport means in a sheet running direction perpendicular to the front edge along an imaginary guideway, with a sheet guiding surface spaced from the guideway, a first sheet surface facing the sheet guiding surface of the arc is exposed to an air flow which is formed by means of blowing air which emerges from a plurality of first nozzle openings of first blowing nozzles in the arc guide surface.

Eine Leiteinrichtung der eingangs genannten Art ist beispielsweise aus der Druckschrift JP 3-7149 U bekannt. Hierin ist ein Kettenausleger einer Bogenrotationsdruckmaschine offenbart, in welchem eine Vorderkante eines bedruckten Bogens vorübergehend in einer Greifereinrichtung eingespannt ist, welche an je einer endlosen Kette eines in parallelen Bahnen umlaufenden Kettenpaares angelenkt ist, so daß die Vorderkante des Bogens eine gedachte Führungsfläche entlang einer zur Vorderkante senkrechten Bogenlaufrichtung bestreicht. Unter einem jeweiligen Abstand zu Orten auf der Führungsfläche ist eine in Form einer Oberfläche eines Leitblechs ausgebildete Bogenleitfläche vorgesehen. Ein jeweiliger Bogen ist auf seinem von der Greifereinrichtung aufgezwungenen Weg einer Luftströmung zwischen dem Bogen und der Bogenleitfläche ausgesetzt. Diese Luftströmung wird mittels einzelner Luftstrahlen erzeugt, die aus der Bogenleitfläche austreten. Hierbei wird die Führung eines frisch bedruckten Bogens in einem Ausleger einer Bogendruckmaschine von der Luftströmung unterstützt, um einen möglichst ruhigen Bogenlauf zu erzielen. Trotz dieser Maßnahme kann jedoch mit der bekannten Leiteinrichtung ein Abschmieren der noch nicht trockenen Druckfarbe insbesondere bei Schön- und Widerdruck nicht gänzlich vermieden werden. Ein Grund hierfür liegt insbesondere in peitschenartigen Bewegungen der nicht zwangsgeführten Bogenhinterkante.A guide device of the type mentioned is known for example from JP 3-7149 U. A chain delivery of a sheet-fed rotary printing machine is disclosed therein, in which a leading edge of a printed sheet is temporarily clamped in a gripper device, which is articulated on an endless chain of a pair of chains rotating in parallel tracks, so that the leading edge of the sheet has an imaginary guide surface along one to the leading edge vertical direction of sheet swept. Provided at a respective distance from locations on the guide surface is an arc guide surface in the form of a surface of a guide plate. A respective sheet is exposed to an air flow between the sheet and the sheet guide surface on its path forced by the gripper device. This air flow is generated by means of individual air jets that emerge from the sheet guide surface. The guidance of a freshly printed sheet in a delivery of a sheet printing machine is supported by the air flow in order to keep the sheet run as smooth as possible achieve. Despite this measure, however, the known guide device cannot completely avoid smearing of the not yet dry printing ink, particularly in the case of perfecting. One reason for this is, in particular, whip-like movements of the non-positively guided trailing edge.

Der Erfindung liegt die Aufgabe zugrunde, eine Leiteinrichtung der eingangs genannten Art zu schaffen, die einen abschmierfreien Bogenlauf ermöglicht.The invention has for its object to provide a guide device of the type mentioned, which enables a lubrication-free sheet run.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Luftströmung eine Hauptströmungsrichtung aufweist, die mittels eines parallel zur Bogenlaufrichtung verlaufenden und in Bogenlaufrichtung weisenden ersten Richtungspfeils beschreibbar ist, daß eine der Bogenleitfläche abgewandte zweite Bogenoberfläche des Bogens mittels einer Mehrzahl von Luftstrahlenbündeln beaufschlagt ist, wobei ein jeweiliges dieser jeweils aus einer zweiten Düsenöffnung einer jeweiligen zweiten Blasdüse austretenden Luftstrahlenbündel eine Hauptströmungsrichtung aufweist, die mittels eines in einer zur Vorderkante des Bogens senkrechten Ebene verlaufenden zweiten Richtungspfeils beschreibbar ist, daß der erste und der zweite Richtungspfeil bei deren Ansatz in einem gemeinsamen Ausgangspunkt einen Winkel einschließen, dessen größter wert 90° beträgt, und daß eine gedachte, die Führungsbahn durchdringende Verlängerung des Zentralstrahls eines jeweiligen Luftstrahlenbündels im Falle einer gegenüber der Führungsbahn geneigten Hauptströmungsrichtung der Luftstrahlenbündel im wesentlichen auf eine der ersten Düsenöffnungen in der Bogenleitfläche trifft.This object is achieved in that the air flow has a main flow direction, which can be described by means of a first directional arrow running parallel to the sheet running direction and pointing in the sheet running direction, that a second sheet surface of the sheet facing away from the sheet guide surface is acted upon by a plurality of air jet bundles, a respective one this air jet bundle emerging from a second nozzle opening of a respective second blowing nozzle has a main flow direction, which can be described by means of a second directional arrow running in a plane perpendicular to the front edge of the arc, that the first and second directional arrows form an angle when they are approached at a common starting point , the greatest value of which is 90 °, and that an imaginary, penetrating extension of the central jet of a respective bundle of air jets in the case of e The main flow direction of the air jet bundle, which is inclined with respect to the guide path, essentially meets one of the first nozzle openings in the sheet guiding surface.

Mittels der im wesentlichen in Bogenlaufrichtung erfolgenden Luftströmung der ersten Blasdüsen wird an der Bogenunterseite eine Tragluftschicht gebildet. Insbesondere im Falle der geneigten Ausrichtung eines jeweiligen Zentralstrahls der auf die Oberseite eines Bogens auftreffenden Luftstrahlenbündel bilden diese zusammen mit der Tragluftschicht eine Luftkissenanordnung, die den jeweiligen Bogen umfängt und flatterfrei sowie berührungslos entlang der Führungsbahn führt. Hierdurch ist selbst für beidseitig frisch bedruckte Bogen ein abschmierfreier Bogenlauf garantiert. Bei bezüglich der Führungsbahn senkrechter Ausrichtung eines jeweiligen Zentralstrahls ergibt sich andererseits ein für Schöndruck hinlänglich ruhiger Bogenlauf.A layer of air is formed on the underside of the sheet by means of the air flow of the first blowing nozzles essentially in the direction of sheet travel. Especially in the case of the inclined alignment of a respective central beam the top of an arc impinging bundles of air jets, together with the air layer, form an air cushion arrangement which surrounds the respective arc and guides along the guideway without fluttering and without contact. This guarantees smear-free sheet travel even for freshly printed sheets on both sides. On the other hand, when a respective central jet is aligned perpendicularly with respect to the guideway, the arc run is sufficiently smooth for straight printing.

Nach einer Weiterbildung der Erfindung ist vorgesehen, daß die zweiten Blasdüsen und gegebenenfalls die ersten Blasdüsen in ihrer Blasrichtung einstellbar ausgebildet sind. Bei einer bevorzugten Ausführungsform sind die zweiten Blasdüsen derart ausrichtbar, daß der zwischen dem ersten und dem zweiten Richtungspfeil eingeschlossene Winkel auf Werte zwischen 90° und etwa 20° einstellbar ist.According to a development of the invention, it is provided that the second blowing nozzles and optionally the first blowing nozzles are designed to be adjustable in their blowing direction. In a preferred embodiment, the second blowing nozzles can be aligned in such a way that the angle enclosed between the first and the second directional arrows can be set to values between 90 ° and approximately 20 °.

Schließlich ist es vorteilhaft, wenn die Luftstrahlenbündel und gegebenenfalls die Luftströmung an der Bogenunterseite mittels Heißluft gebildet sind.Finally, it is advantageous if the bundles of air jets and optionally the air flow on the underside of the sheet are formed by means of hot air.

Die Zeichnung veranschaulicht die Erfindung anhand eines Ausführungsbeispiels und zwar zeigt:

Die Figur
eine Seitenansicht eines Abschnitts eines Auslegers einer Bogendruckmaschine.
The drawing illustrates the invention using an exemplary embodiment and shows:
The figure
a side view of a portion of a boom of a sheet printing machine.

Der in der Figur dargestellte Abschnitt eines Auslegers einer nicht näher dargestellten Bogendruckmaschine weist eine Leiteinrichtung 2 auf, die dem Führen von bedruckten Bogen 1 dient, welche -von einer Auslegertrommel 3 kommend- eine Führungsbahn 4 des Auslegers durchlaufen und einem nicht dargestellten Stapeltisch zugeführt werden. Der Transport der Bogen 1 erfolgt mittels einer Greifereinrichtung 5, welche die Vorderkante des jeweiligen Bogens 1 mittels Greifern erfaßt. Die Greifereinrichtung 5 ist an umlaufenden, geführten Kettentrumen angeordnet, wodurch die Führungsbahn 4 gebildet ist.The section of a delivery arm of a sheet-fed printing machine, not shown, has a guide device 2 which serves to guide printed sheets 1 which, coming from a delivery drum 3, pass through a guide path 4 of the delivery arm and are fed to a stacking table, not shown. The sheet 1 is transported by means of a gripper device 5, which grips the front edge of the respective sheet 1 detected. The gripper device 5 is arranged on circumferential, guided chain runs, as a result of which the guide track 4 is formed.

Parallel zur Führungsbahn 4 und zu dieser beabstandet verläuft eine Bogenleitfläche 6, in die eine Mehrzahl erster Blasdüsen 7, vorzugsweise mit der Bogenleitfläche 6 bündig, eingelassen sind. Die ersten Blasdüsen 7 weisen erste Düsenöffnungen 7' auf. Aus den ersten Blasdüsen 7 tritt Blasluft 8 derart aus, daß eine Luftströmung 8' gebildet wird, deren Hauptströmungsrichtung in Bogenlaufrichtung weist. Die Bogenlaufrichtung ist mit Hilfe eines ersten Richtungspfeiles 9 angegeben; sie entspricht dem Verlauf der Führungsbahn 4. Die Blasluft 8 beaufschlagt jeweils eine erste Bogenoberfläche der mittels der Greifereinrichtung 5 erfaßten Bogen 1, wobei die erste Bogenoberfläche der Bogenleitfläche 6 zugewandt ist.A sheet guiding surface 6 runs parallel to the guideway 4 and at a distance therefrom, into which a plurality of first blowing nozzles 7 are inserted, preferably flush with the sheet guiding surface 6. The first blowing nozzles 7 have first nozzle openings 7 '. Blown air 8 emerges from the first blowing nozzles 7 in such a way that an air flow 8 ′ is formed, the main flow direction of which points in the direction of the sheet travel. The direction of sheet travel is indicated with the aid of a first directional arrow 9; it corresponds to the course of the guideway 4. The blowing air 8 acts in each case on a first sheet surface of the sheets 1 gripped by the gripper device 5, the first sheet surface facing the sheet guide surface 6.

Gegenüberliegend zur Bogenleitfläche 6 weist der Ausleger eine Trocknungseinrichtung 12 auf. Diese kann Infrarot- und/oder Ultraviolett-Strahlung aussenden, wodurch entsprechend sensibilisierte Druckfarben auf schnellstem Wege getrocknet werden können. Wesentlich ist, daß diese Trocknungseinrichtung 12 ein sogenanntes Luftrakel aufweist, das heißt, es geht von ihr eine Luftströmung 13 aus, die im Hinblick auf die vorstehend bereits erwähnte Blasluft 8 eine zweite Luftbeaufschlagung bildet. Sie resultiert aus einer Mehrzahl von Luftstrahlenbündeln 14, die aus zweiten Düsenöffnungen 15' von zweiten Blasdüsen 15 austreten. Ebenso wie die ersten Blasdüsen 7 sind die zweiten Blasdüsen 15 in Längs- und Querrichtung des Auslegers verteilt. Die zweiten Blasdüsen 15 gehören der Trocknungseinrichtung 12 an. Hierdurch ist eine Blaslufttrocknung realisiert, deren Wirkung durch Verwendung von Heißluft zur Bildung der Luftstrahlenbündel 14 verstärkbar ist. Die Blaslufttrocknung führt zu einer physikalischen Trocknung von Druckfarbe auf den Bogen 1, wobei eine Unterstützung mittels IR-beziehungsweise UV- Strahlung -wie erwähnt - vorhanden sein kann, jedoch nicht zwingend ist. Gegebenenfalls kann auch die Luftströmung 8' an der Bogenunterseite mittels Heißluft gebildet sein. Der zusätzlich zur Funktion der Führung des Bogens 1 auftretende Trocknungseffekt tritt in verstärktem Maße auf, wenn die Hauptströmungsrichtung der Luftstrahlenbündel 14 senkrecht bezüglich der Führungsbahn orientiert ist.Opposite the sheet guide surface 6, the delivery has a drying device 12. This can emit infrared and / or ultraviolet radiation, which means that appropriately sensitized printing inks can be dried as quickly as possible. It is essential that this drying device 12 has a so-called air knife, that is, it emits an air flow 13 which forms a second air supply with regard to the above-mentioned blowing air 8. It results from a plurality of air jet bundles 14 emerging from second nozzle openings 15 ′ from second blowing nozzles 15. Like the first blowing nozzles 7, the second blowing nozzles 15 are distributed in the longitudinal and transverse directions of the boom. The second blowing nozzles 15 belong to the drying device 12. This results in blown air drying, the effect of which can be enhanced by using hot air to form the air jet bundles 14. Blow air drying leads to physical drying of printing ink Bogen 1, whereby support by means of IR or UV radiation, as mentioned, may be present, but is not mandatory. If necessary, the air flow 8 'can also be formed on the underside of the sheet by means of hot air. The drying effect which occurs in addition to the function of guiding the sheet 1 occurs to an increased extent when the main flow direction of the air jet bundles 14 is oriented perpendicularly with respect to the guideway.

Ein die Hauptströmungsrichtung eines jeweiligen Luftstrahlenbündels 14 darstellender zweiter Richtungspfeil 16 liegt jeweils in einer zur Vorderkante des Bogens 1 senkrechten Ebene. Die beiden, in einem gemeinsamen Ausgangspunkt angesetzten Richtungspfeile 9 und 16 schließen einen Winkel Alpha ein, dessen größter wert 90° beträgt. Insbesondere sind die zweiten Blasdüsen 15 derartig ausrichtbar, daß der zwischen dem ersten und dem zweiten Richtungspfeil 9 und 16 eingeschlossene Winkel Alpha Werte zwischen 90° und etwa 20° annimmt.A second directional arrow 16, which represents the main flow direction of a respective bundle of air jets 14, lies in a plane perpendicular to the front edge of the arc 1. The two directional arrows 9 and 16, applied at a common starting point, enclose an angle alpha, the largest value of which is 90 °. In particular, the second blowing nozzles 15 can be aligned in such a way that the angle alpha enclosed between the first and the second directional arrows 9 and 16 assumes values between 90 ° and approximately 20 °.

In der Figur ist ein Ausführungsbeispiel mit einer gegenüber der Führungsbahn 4 geneigten Hauptströmungsrichtung der Luftstrahlenbündel 14 dargestellt. Die Luftstrahlenbündel 14 sind hierbei derartig ausgerichtet, daß eine gedachte Verlängerung des Zentralstrahls 16 eines jeweiligen Luftstrahlbündels 14 im wesentlichen auf eine jeweilige der ersten Düsenöffnungen 7' trifft Bei veränderter Neigung der Zentrahlstrahlen 14 treffen diese auf jeweils andere der Düsenöffnungen 7'. Hierzu wird die Ausrichtung der zweiten Blasdüsen 15 stufenweise vorgenommen.In the figure, an embodiment is shown with a main flow direction of the air jet bundle 14 which is inclined with respect to the guideway 4. The air jet bundles 14 are aligned in such a way that an imaginary extension of the central jet 16 of a respective air jet bundle 14 essentially meets a respective one of the first nozzle openings 7 '. When the inclination of the central jet jets 14 changes, they meet each other of the nozzle openings 7'. For this purpose, the alignment of the second blowing nozzles 15 is carried out in stages.

Claims (4)

Leiteinrichtung für einen gegebenenfalls beidseitig frisch bedruckten Bogen (1), dessen Vorderkante mittels einer von Transportmitteln getragenen Greifereinrichtung (5) in einer zu der Vorderkante senkrechten Bogenlaufrichtung (Pfeil 9) entlang einer gedachten Führungsbahn (4) geführt ist, mit einer von der Führungsbahn (4) beabstandeten Bogenleitfläche (6), wobei eine der Bogenleitfläche (6) zugewandte erste Bogenoberfläche des Bogens (1) einer Luftströmung (8') ausgesetzt ist, die mittels Blasluft gebildet ist, welche aus einer Mehrzahl von ersten Düsenöffnungen (7') erster Blasdüsen (7) in der Bogenleitfläche (6) austritt,
dadurch gekennzeichnet, daß - die Luftströmung (8') eine Hauptströmungsrichtung aufweist, die mittels eines parallel zur Bogenlaufrichtung verlaufenden und in Bogenlaufrichtung weisenden ersten Richtungspfeils (9) beschreibbar ist, - eine der Bogenleitfläche (6) abgewandte zweite Bogenoberfläche des Bogens mittels einer Mehrzahl von Luftstrahlenbündeln (14) beaufschlagt ist, wobei ein jeweiliges dieser jeweils aus einer zweiten Düsenöffnung (15') einer jeweiligen zweiten Blasdüse (15) austretenden Luftstrahlenbündel (14) eine Hauptströmungsrichtung aufweist, die mittels eines in einer zur Vorderkante des Bogens senkrechten Ebene verlaufenden zweiten Richtungspfeils (16) beschreibbar ist, - der erste und der zweite Richtungspfeil (9 und 16) bei deren Ansatz in einem gemeinsamen Ausgangspunkt einen Winkel (Alpha) einschließen, dessen größter Wert 90° beträgt, und - eine gedachte, die Führungsbahn (4) durchdringende Verlängerung des Zentralstrahls (16) eines jeweiligen Luftstrahlenbündels (14) im Falle einer gegenüber der Führungsbahn (4) geneigten Hauptströmungsrichtung der Luftstrahlenbündel (14) im wesentlichen auf eine der ersten Düsenöffnungen (7') in der Bogenleitfläche (6) trifft. Guide device for an optionally freshly printed sheet (1), the front edge of which is guided along an imaginary guideway (4) by means of a gripper device (5) carried by transport means in a sheet running direction (arrow 9) perpendicular to the front edge, with one of the guideway ( 4) spaced sheet guide surface (6), wherein a first sheet surface of the sheet (1) facing the sheet guide surface (6) is exposed to an air flow (8 ') which is formed by means of blown air which consists of a plurality of first nozzle openings (7') first Blowing nozzles (7) exits in the sheet guide surface (6),
characterized in that the air flow (8 ') has a main flow direction which can be described by means of a first direction arrow (9) which runs parallel to the sheet running direction and points in the sheet running direction, - A second sheet surface of the sheet facing away from the sheet guide surface (6) is acted upon by a plurality of air jet bundles (14), a respective one of these air jet bundles (14) emerging from a second nozzle opening (15 ') of a respective second blowing nozzle (15) having a main flow direction which can be described by means of a second directional arrow (16) running in a plane perpendicular to the front edge of the sheet, - the first and the second directional arrows (9 and 16) form an angle (alpha) in their approach in a common starting point, the largest value of which is 90 °, and - An imaginary, the guideway (4) penetrating extension of the central jet (16) of a respective bundle of air jets (14) in the case of an inclined with respect to the guideway (4) main flow direction of the air bundle (14) essentially to one of the first nozzle openings (7 ') in the sheet guide surface (6) hits. Leiteinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die zweiten Blasdüsen (15) und gegebenenfalls die ersten Blasdüsen (7) bezüglich ihrer Blasrichtung einstellbar ausgebildet sind.Guide device according to claim 1,
characterized by
that the second blowing nozzles (15) and optionally the first blowing nozzles (7) are designed to be adjustable with respect to their blowing direction. Leiteinrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die zweiten Blasdüsen (15) derartig ausrichtbar sind, daß der zwischen dem ersten und dem zweiten Richtungspfeil (9 und 16) eingeschlossene Winkel (Alpha) auf Werte zwischen 90° und etwa 20° einstellbar ist.Guide device according to claim 2,
characterized by
that the second blowing nozzles (15) can be aligned in such a way that the angle (alpha) enclosed between the first and the second directional arrows (9 and 16) can be set to values between 90 ° and approximately 20 °. Leiteinrichtung nach einem der vorhergehenden Ansprüche
dadurch gekennzeichnet,
daß die Luftstrahlenbündel (14) und gegebenenfalls die Luftströmung (8') mittels Heißluft gebildet sind.Guide device according to one of the preceding claims
characterized by
that the bundles of air jets (14) and optionally the air flow (8 ') are formed by means of hot air.
EP95112286A 1994-09-02 1995-08-04 Device for guiding a sheet Expired - Lifetime EP0701958B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4431255 1994-09-02
DE4431255 1994-09-02
DE19524641 1995-07-06
DE19524641A DE19524641A1 (en) 1994-09-02 1995-07-06 Guide device for an arch

Publications (2)

Publication Number Publication Date
EP0701958A1 true EP0701958A1 (en) 1996-03-20
EP0701958B1 EP0701958B1 (en) 1998-07-15

Family

ID=25939780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112286A Expired - Lifetime EP0701958B1 (en) 1994-09-02 1995-08-04 Device for guiding a sheet

Country Status (6)

Country Link
US (1) US5655449A (en)
EP (1) EP0701958B1 (en)
JP (1) JP2788616B2 (en)
CN (1) CN1128211A (en)
AT (1) ATE168352T1 (en)
CA (1) CA2155785C (en)

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JP2001213545A (en) 1999-12-17 2001-08-07 Heidelberger Druckmas Ag Delivery of machine handling flat object to be printed
DE10033838A1 (en) * 2000-07-12 2002-01-24 Roland Man Druckmasch Device for holding sheet of paper on impression cylinder of printing machine uses both electrostatic field generation and pressurized air jets
DE10310690A1 (en) * 2002-04-12 2003-10-30 Heidelberger Druckmasch Ag Sheet guide in sheet-processing machine especially rotary printer has pick-up pieces, free air jet nozzles and air cushion
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DE102006002357B4 (en) * 2005-02-11 2022-02-17 Heidelberger Druckmaschinen Ag Device for supporting or guiding a sheet of printing material
US20080265493A1 (en) * 2007-04-30 2008-10-30 Robert Wall Air delivery device for printing and coating applications
JP2010234743A (en) * 2009-03-31 2010-10-21 Mitsubishi Heavy Ind Ltd Exhaust device for printing target medium delivery part, printing target medium delivery device, and printer
CN103240915B (en) * 2013-05-15 2015-04-08 常州市恒成塑料机械有限公司 Crosscutting and conveying device for woven plastic cylindrical cloth for block bottom valve bag production
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DE102011078187B4 (en) * 2011-06-28 2015-04-09 Koenig & Bauer Aktiengesellschaft Process for drying at least a first substrate web

Also Published As

Publication number Publication date
CA2155785A1 (en) 1996-03-03
JP2788616B2 (en) 1998-08-20
CN1128211A (en) 1996-08-07
JPH08187839A (en) 1996-07-23
ATE168352T1 (en) 1998-08-15
CA2155785C (en) 1998-05-19
US5655449A (en) 1997-08-12
EP0701958B1 (en) 1998-07-15

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