EP0899228B1 - Dispositif de guidage à coussin d'air - Google Patents

Dispositif de guidage à coussin d'air Download PDF

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Publication number
EP0899228B1
EP0899228B1 EP98110743A EP98110743A EP0899228B1 EP 0899228 B1 EP0899228 B1 EP 0899228B1 EP 98110743 A EP98110743 A EP 98110743A EP 98110743 A EP98110743 A EP 98110743A EP 0899228 B1 EP0899228 B1 EP 0899228B1
Authority
EP
European Patent Office
Prior art keywords
nozzles
air
guide body
guide
air cushion
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
EP98110743A
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German (de)
English (en)
Other versions
EP0899228A2 (fr
EP0899228A3 (fr
Inventor
Günter Stephan
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 DE19747040A external-priority patent/DE19747040A1/de
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to EP01115719A priority Critical patent/EP1151948B1/fr
Publication of EP0899228A2 publication Critical patent/EP0899228A2/fr
Publication of EP0899228A3 publication Critical patent/EP0899228A3/fr
Application granted granted Critical
Publication of EP0899228B1 publication Critical patent/EP0899228B1/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52—Stationary guides or smoothers
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/20—Volume; Volume flow

Definitions

  • the invention relates to an air cushion guide for arched or web-shaped Materials, especially for printed sheets of paper in a printing press, at which is the guided sheet or sheet material on an air cushion supported by at least one guide body with nozzle openings, through the air is blown between the guide bodies and the guided material.
  • Air cushion guides are for example in DE 44 27 448 A1 and DE 42 42 730 A1. They come in all kinds of shapes and configurations among other things used to make the freshly printed and still damp Sheets of paper in the delivery of, for example, offset printing machines are non-contact from the printing unit to the delivery stack or in sheet turning devices Sheet transfer drums or similar to the sheet between two printing cylinders transport.
  • DE 42 09 067 A1 describes a sheet guiding device in which the Floating height of the arch in the middle section of the arch by additional Blowing nozzles are enlarged, their blowing jets perpendicular to the arc surface hit and this through the impulse effect of these additional air jets in the Raise the middle. This may allow the hovering height to be above the Homogenize the width of the arch, a change in the total hover height however, does not result.
  • a combination of nozzles that work according to the hydrodynamic paradox, and blowing nozzles directed vertically onto the guided paper web for the purpose of elevation and the levitation height of the guided path is even in the DE 17 74 126 described for sheet-like materials. But there is none there either Possibility given to the levitation height when operating the device adapt different material qualities.
  • the invention is based on the knowledge that the levitation height at a only according to the hydrodynamic paradox air cushion guide can change significantly if the proportionality between that from the nozzles emerging air volume flow and the flow velocity of the air is lifted between the guide body and the guided material. To do that the air volume flow and / or the flow velocity the air is set independently of one another and thus the quotient between the changed both sizes mentioned.
  • the air cushion guide can also be optimally attached to others Adapt influences that occur on printing presses during operation, such as Subject and degree of moisture absorption of the printed sheet, centrifugal forces occurring, Turbulence, air jets from hot air dryers etc.
  • the printer receives one another possibility to influence the guided bow and the result optimize the printing process.
  • each group of Nozzles can be switched on and off separately with blown air. So the groups can from nozzles via switching valves to a common blower air generator be connected, or each group of nozzles to a separate one Blow air generator must be connected.
  • By machine-controlled actuation of the Switching valves or activation of the blowing air generators can then Increase the total air volume flow under the guided material or sheet, without changing the flow velocity of the air. In this way the hovering height of the guided material or sheet increases without Loss of leadership stability.
  • the nozzles can have flap-shaped, flexible tongues, which are deformed, for example, via electrically actuated actuating gears. at suitable cross-section of the tongues as a bimetallic strip Change nozzle opening also via the temperature of the air flow, or at lighter Flexibility of the tongues under the influence of those forming on the nozzles Pressure difference.
  • the guide bodies have at least two groups of nozzles and the groups have different consumer characteristics, ie different dependencies of the volume flow let through the nozzle openings on the supply pressure p v applied to the nozzle openings. If the consumer characteristic curves differ by at least a factor of 2, for example, by controlling the ratio of the pressures p v 1, p v 2 of both nozzle groups, the quotient of the volume flow Q blown into the air cushion with the flow velocity that is effectively formed under the material being guided can be determined c influence the air flow and thus also the hover height h.
  • the degree of influence is, of course, the greater, the more different the consumer characteristics of both groups of nozzles are, so that it is then also expedient to operate the groups of nozzles by different blown air generators, such as gas blowers, ejectors or axial fans, which are inherent provide different high admission pressures and volume flows.
  • the embodiment of the invention can be automated particularly well because for a control of the levitation height, for example, only the speeds of the Blowing air generators, which supply the two groups of nozzles, independently need to be controlled from each other.
  • the determination of the manipulated variables can be based on previously stored one or two-dimensional characteristic fields.
  • the delivery 1 of a sheet printing machine is shown schematically.
  • the sheets of paper 4 gripped on the gripper bridges 2 on the front side are conveyed by the last printing unit, not shown in the figure, via a so-called guide body 3 in the direction of the delivery stack 6.
  • the guide body 3 is designed as a box, into the hollow interior of which a blower 7 blows air via a connecting line 8 and thus generates an overpressure p v which escapes through a plurality of nozzle openings 5 and thus enters Air cushion builds between the air body 3 or its surface and the underside of the sheet 4 guided over it.
  • FIG. 3 shows an example of the characteristic curves of the two essential components of an air cushion guide, namely that of a typical air generator, ie a blower (Graph B) and that of a consumer, ie a number of nozzle openings in a guide body (Graph A).
  • the characteristic curve of the consumer with the nozzle openings acting as a throttle begins at the zero point and then rises.
  • the characteristic of the air generator (Graph B), on the other hand, reaches its maximum pressure when the volume flow drops to zero due to the throttling effect of the consumer, ie in the case that all nozzle openings are closed.
  • the operating point p, the air cushion guide is the intersection between the characteristic curves B of the air generator A and the air consumer.
  • the generator characteristic curve changes, as is shown by the dashed graphs B 'and B "in FIG. 1.
  • the intersection points with the unchanged consumer characteristic curve result as operating points for the air cushion guidance.
  • the power of the blower as shown by the bold part of graph A in FIG. 1, the volume flow can be changed approximately proportionally to the pressure applied to the nozzles. Since the flow rate in turn depends on the pressure, as shown in the graph in FIG.
  • the flow rate depends on the pressure p v at the nozzle openings, in order to achieve the aim of the invention, this should be able to be changed independently or not in proportion to the volume flow through the nozzles.
  • the chamber 13 under the guide plate 13b which together form the guide body of an air cushion guide, consists of several individual chambers 16a, b ... in whose air supply lines there is an electrically controllable valve on the underside.
  • the air supply lines opening into the base plate 13a of the guide body are designated by way of example with 14 a, b and c and the associated valves with 15 a, b and c.
  • the corresponding chambers 16 a, b and c of the guide body are each assigned groups of nozzles in the guide plate, of which each group is only symbolically represented as an individual nozzle 12 a to c for the sake of clarity.
  • the chambers 16a, 16c are supplied together by a speed-controllable fan 17.
  • the fan 17, like the valves 15a, 15b, 15c ..., is connected to an electronic control unit 19 which, from the central control computer of the printing press, to which the delivery arm shown in FIG. 1 belongs, feeds the hovering height h should of the non-contact sheet as a setpoint becomes.
  • the control works as follows: If the levitation height is to be changed to smaller values, the controller 19 switches off some of the valves 15 and thus reduces the number of effective nozzle openings. In this way, the volume flow of the gas blown into the air cushion is reduced, while at the same time, due to the higher throttling action of the nozzle arrangement, the pressure generated by the blower 17 increases and thus also the flow velocity of the air flow emerging from the nozzles 12. In this way, for the air cushion guidance in the diagram according to FIG. 3, an operating point is obtained at the point designated P2. This corresponds to the intersection of a flatter consumer characteristic curve A 'with the unchanged generator characteristic curve B. If, at the same time, the flow speed under the bend is to be adjusted to the previous value, the fan is additionally regulated to a lower speed, so that the generator characteristic curve B "and thus a working point at the point designated P3 in the diagram of Figure 2 results.
  • the two webs 115a and 115b can be reversed to each other with the help of threaded spindles 114a and 114b with the help of one to the Adjust control 119 of connected motor 120 and toothed belt 110. In this way, the size of the two chambers 116a and 116b can be change that are not connected to the blower 117 and thus the them deactivate the assigned nozzles above.
  • the Volume flow of the air cushion guide independent of the Change flow rate by changing the cross sections of individual Nozzle openings or groups of nozzle openings or all nozzle openings are changeable.
  • the bend 201 floats in a manner known per se through nozzle openings Embossing / punching process introduced so that it is inside the guide body protruding tongues 212a, b, c .... over which the air flow of the Overpressure in the chamber 213 of the guide body under the guided bend 201 can reach.
  • the heating coil 216 introduced a controllable heater 215.
  • the Heating power and the Speed of the fan 217 set so that the Flow velocity c of the air flow emerging from the nozzles and the air volume flow Q independently of that for the bend 201 have the optimal conditions adjusted.
  • Controlled bending of the resilient tongues of the nozzle openings leaves however, can also be accomplished in a different way, as outlined in FIG. 8a is.
  • the tongues 312 of the nozzles in the guide plate 313b of the guide body are around assigned a shaft 315 rotating eccentric discs 316, with the help of which flexible tongues 312 can be partially closed.
  • the shaft 315 is for example connected to a stepper motor, not shown here, the is in turn connected to a control system via which the Angular position of the shaft 315 and thus the cross-sectional area of the nozzles and If necessary, have the power of the compressed air supplier set.
  • cross-sectional area of the nozzle openings can also be through electrically actuated slide 318, flaps, or the like, change which is shown in Figure 8b, without the nozzle tongues themselves resilient must be trained and deformed.
  • FIG. 9 shows a particularly preferred embodiment of the invention.
  • the guide body 413 over which the sheet 401 is guided, is divided into three parallel chambers 416a, 416b and 416c, which are adjacent to one another and which are each connected to a separate air supplier.
  • the chambers 416a and 416c are each connected to a gas blower 417a and 417c, with which relatively high admission pressures p 0 can be achieved with small volume flows.
  • the middle chamber 416b is supplied by an axial fan 417b, which delivers high air volume flows even at low pressure differences.
  • the boundaries of the three chambers do not have to run in a straight line as shown in FIG. 10, but can also run in a serrated manner in order to mix as well as possible the different air flows emerging from the nozzles 417 of the guide plate 413b under the guided arc 401.
  • the consumer characteristic curve A1 of the middle chamber 416b is relatively steep. at low pressure, a high volume flow is already achieved. Hence a large volume of air with low flow speed under the bend 401tientspühlt. This is achieved by a large number of nozzles in the Sheet baffle 413a, that is, by a high nozzle density, or by using nozzles correspondingly large opening cross sections.
  • the consumer characteristics A2 of the two outer chambers 416a and 416c run relatively flat. To push enough air through the nozzles, a high pressure difference is created. Since the form in the chambers 416a and 416c is thus high, the air flows out of them at high speed Chamber associated nozzles. This is achieved through a low one Nozzle density or through nozzles with very narrow throttle cross sections.
  • the diagram 10 shows the characteristics of the chambers 416 and the blowers 417 drawn together. For the two different chamber types then in connection with the two different blowers or Fan types the working points designated P1 and P2.
  • the air flowing out of the middle chamber 416b is maintained by the arrangement the nozzles are directed towards the two outer chambers 416a and c Flow direction.
  • the large volume of air in this chamber flows at a lower rate Speed between the baffle 413a and the bend 401.
  • This middle Chamber 416b is relatively narrow.
  • the air emerging from the first chamber 416b mixes with the air from the chambers 416a and 416c above the two outer chambers 416a and 416c.
  • the volume flows add up and the speeds mix weighted according to the proportions of the volume flows. If the consumer characteristics of the chambers are chosen very differently, a wide range of operating points can be obtained by mixing the two air flows. In this way, it is now possible to control the speed of the gas blowers 417a and c or the axial fan 417b, the volume flow blown into the air cushion and the average flow velocity which is established according to the mixing rule, simply by corresponding control c set independently of one another and thus also select the floating height of the arch 401 over the guide plate 413b within wide limits as required.
  • the extent to which the levitation height can be changed naturally depends on the ratio of the areas of the nozzle openings of the chambers 416a and c on the one hand and 416b on the other hand. It should be about a factor of 2 to 20.
  • FIGS. 12a and b Another preferred exemplary embodiment of the invention is shown in FIGS. 12a and b.
  • the sheet 501 which is to be printed on the back, for example, is conveyed by a transfer drum 502 between two printing cylinders 503 and 504.
  • an air cushion guide which is semi-circular in section, is arranged below the transfer drum at a short distance from the circular arc described by the grippers of the drum 502.
  • the top view of the likewise semicircular sheet guide plate of this air cushion guide is shown in FIG.
  • the air generators 513a, b and 513 g, h are gas blowers which supply a few nozzles arranged on the outer edges of the sheet guide with a relatively high pre-pressure or the nozzles assigned to them, arranged on the sheet guide plate close to each other, by four axial fans 417c-d, which generate a high volume flow.
  • the levitation height h of the arch 501 above the arch guide plate is set similarly to that described in the exemplary embodiment according to FIG. 9.

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

Claims (14)

  1. Dispositif de guidage à coussin d'air pour des matériaux se présentant sous la forme de feuilles ou de bandes, en particulier pour des feuilles de papier imprimées dans une machine à imprimer, dans lequel le matériau guidé, se présentant sous la forme de feuilles ou de bandes, est en appui sur un coussin d'air gonflable, au-dessus d'au moins un corps de guidage comportant des orifices formant des buses, orifices à travers lesquels de l'air est soufflé entre le corps de guidage et le matériau guidé, et le flux de volume d'air (Q) sortant des buses entre le corps de guidage (3 ; 13) et le matériau guidé (4) est réglable, et le corps de guidage comporte plusieurs groupes (12a - c) de buses, chaque groupe de buses étant alimenté séparément par de l'air de soufflage,
    caractérisé en ce que les groupes (12a - c) de buses sont raccordés, par des relais pneumatiques (15a - c), à un générateur commun (17) d'air de soufflage, de sorte que le flux de volume d'air (Q) sortant des buses est réglable indépendamment de la vitesse d'écoulement (c) entre un corps de guidage (3 ; 13 ; 113 ; 213 ; 313b ; 413a,b,c ; 513) et le matériau guidé (1 ; 201 ; 301 ; 401 ; 501), de sorte que la proportionnalité entre les deux variables est supprimée.
  2. Dispositif de guidage à coussin d'air pour des matériaux se présentant sous la forme de feuilles ou de bandes, en particulier pour des feuilles de papier imprimées dans une machine à imprimer, dans lequel le matériau guidé, se présentant sous la forme de feuilles ou de bandes, est en appui sur un coussin d'air gonflable, au-dessus d'au moins un corps de guidage comportant des orifices formant des buses, orifices à travers lesquels de l'air est soufflé entre le corps de guidage et le matériau guidé, et le flux de volume d'air (Q) sortant des buses entre un corps de guidage (3 ; 113 ; 213 ; 313) et le matériau guidé (4) est réglable,
    caractérisé en ce que les sections d'orifices individuels formant des buses ou de tous les orifices formant des buses peuvent être modifiées par des clapets, des volets (318a) ou des éléments analogues pouvant être actionnés électriquement, de sorte que le flux de volume d'air (Q) sortant des buses est réglable indépendamment de la vitesse d'écoulement (c) entre un corps de guidage (3 ; 13 ; 113 ; 213 ; 313b ; 413a,b,c ; 513) et le matériau guidé (1 ; 201 ; 301 ; 401 ; 501), de sorte que la proportionnalité entre les deux variables est supprimée.
  3. Dispositif de guidage à coussin d'air selon la revendication 2, les buses ayant des languettes flexibles (312) en forme de clapet, languettes qui sont déformables lorsqu'elles sont commandées.
  4. Dispositif de guidage à coussin d'air selon la revendication 3, caractérisé par des mécanismes de réglage (315 ; 316) pouvant être actionnés électriquement pour la déformation des languettes.
  5. Dispositif de guidage à coussin d'air selon la revendication 3, où les languettes (212 / 214) sont configurées comme des bilames et un dispositif de chauffage (215 / 216) est prévu pour le flux d'air.
  6. Dispositif de guidage à coussin d'air selon la revendication 3, les languettes se déformant soue l'effet de la différence de pression (pv - p0) se formant au niveau des buses.
  7. Dispositif de guidage à coussin d'air pour des matériaux se présentant sous la forme de feuilles ou de bandes, en particulier pour des feuilles de papier imprimées dans une machine à imprimer, dans lequel le matériau guidé, se présentant sous la forme de feuilles ou de bandes, est en appui sur un coussin d'air gonflable, au-dessus d'au moins un corps de guidage comportant des orifices formant des buses, orifices à travers lesquels de l'air est soufflé entre le corps de guidage et le matériau guidé, et le flux de volume d'air (Q) sortant des buses entre le corps de guidage (3 ; 13) et le matériau guidé (4) est réglable, et le corps de guidage comporte plusieurs groupes (12a - c) de buses, chaque groupe de buses étant alimenté séparément par de l'air de soufflage,
    caractérisé en ce que les groupes possèdent différentes courbes caractéristiques de consommation (A1, A2) et en ce que les pressions (Pv1, Pv2), servant à l'alimentation des groupes de buses, sont réglables indépendamment l'une de l'autre, de manière telle que le flux de volume d'air (Q) sortant des buses et la vitesse d'écoulement (c) entre un corps de guidage (3 ; 13 ; 113 ; 213 ; 313b ; 413a,b,c ; 513) et le matériau guidé (1 ; 201 ; 301 ; 401 ; 501) soient réglables indépendamment l'un de l'autre, de sorte qu'ils sont modifiables suivant un rapport non proportionnel des deux variables l'une par rapport à l'autre.
  8. Dispositif de guidage à coussin d'air selon la revendication 7, où la somme des surfaces d'étranglement des buses des deux groupes (412a/c, 412b) se différencie par au moins un facteur de 2.
  9. Dispositif de guidage à coussin d'air selon la revendication 7, où les groupes individuels (412a/c, 412b) de buses sont raccordés à différents générateurs (417a/c, 417b) d'air de soufflage.
  10. Dispositif de guidage à coussin d'air selon l'une quelconque des revendications 1 à 9, caractérisé par un dispositif de commande électrique (19 ; 119 ; 219 ; 419) auquel on peut fournir la hauteur de suspension (hthéorique) du matériau guidé (201 ; 401) par le coussin d'air ou la mesure de la modification de cette hauteur de suspension considérée comme valeur théorique et qui, ensuite, calcule des variables de commande pour une modification du volume d'air (Q) sortant des orifices formant des buses et/ou pour une modification de la vitesse d'écoulement (c) entre un corps de guidage et le matériau guidé.
  11. Rotative offset à feuilles comprenant un dispositif de guidage à coussin d'air (3) pour les feuilles imprimées (4) selon l'une quelconque des revendications 1 à 10, dans le dispositif de sortie (1) de la machine.
  12. Rotative offset à feuilles comprenant un dispositif de guidage à coussin d'air (513) pour les feuilles imprimées selon l'une quelconque des revendications 1 à 10, dans la zone du transfert des feuilles (501) ou dans la zone de rotation entre deux cylindres d'impression de la machine.
  13. Procédé de réglage de la hauteur de suspension de matériaux se présentant sous la forme de feuilles ou de bandes, dans un dispositif de guidage à coussin d'air dans lequel le matériau guidé est en appui sur un coussin d'air gonflable, au-dessus d'au moins un corps de guidage, et de l'air est soufflé sous le matériau guidé, par des buses placées dans le corps de guidage, et le flux de volume d'air (Q) sortant des buses entre un corps de guidage (3 ; 13) et le matériau guidé (4) est réglable, et le corps de guidage comporte plusieurs groupes (12a - c) de buses, chaque groupe de buses étant alimenté séparément par de l'air de soufflage,
    caractérisé en ce que le corps de guidage comporte au moins deux groupes (412a/c, 412b ; 512a/b/g/h, 512c/d/e/f) de buses ayant différentes courbes caractéristiques de consommation des groupes, et le rapport des pressions d'air (Pv1, Pv2), l'une par rapport à l'autre, est modifié, pressions d'air avec lesquelles les groupes de buses sont alimentés, de manière telle que le flux de volume d'air (Q) sortant des buses est modifié indépendamment de la vitesse d'écoulement (c) entre un corps de guidage (3 ; 13 ; 113 ; 213 ; 313b ; 413a,b,c ; 513) et le matériau guidé (1 ; 201 ; 301 ; 401 ; 501), suivant un rapport non proportionnel entre les deux variables.
  14. Procédé de réglage de la hauteur de suspension de matériaux se présentant sous la forme de feuilles ou de bandes, dans un dispositif de guidage à coussin d'air dans lequel le matériau guidé est en appui sur un coussin d'air gonflable, au-dessus d'au moins un corps de guidage, et de l'air est soufflé sous le matériau guidé, par des buses placées dans le corps de guidage, et le flux de volume d'air (Q) sortant des buses entre un corps de guidage (3 ; 13) et le matériau guidé (4) est réglable, et le corps de guidage comporte, le cas échéant, plusieurs groupes (12a - c) de buses,
    caractérisé en ce que les sections efficaces des buses ou de groupes individuels de buses sont modifiées par des clapets, des volets ou des relais pneumatiques pouvant être actionnés électriquement, pour le réglage du flux de volume d'air (Q) sortant des buses, indépendamment de la vitesse d'écoulement (c) entre un corps de guidage (3 ; 13 ; 113 ; 213 ; 313b ; 413a,b,c ; 513) et le matériau guidé (1 ; 203 ; 301 ; 401 ; 501), de sorte que la proportionnalité entre les deux variables est supprimée.
EP98110743A 1997-08-28 1998-06-12 Dispositif de guidage à coussin d'air Expired - Lifetime EP0899228B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01115719A EP1151948B1 (fr) 1997-08-28 1998-06-12 Dispositif de guidage de feuilles

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19737564 1997-08-28
DE19737564 1997-08-28
DE19747040A DE19747040A1 (de) 1997-08-28 1997-10-24 Luftpolsterführung
DE19747040 1997-10-24

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP01115719A Division EP1151948B1 (fr) 1997-08-28 1998-06-12 Dispositif de guidage de feuilles

Publications (3)

Publication Number Publication Date
EP0899228A2 EP0899228A2 (fr) 1999-03-03
EP0899228A3 EP0899228A3 (fr) 1999-12-08
EP0899228B1 true EP0899228B1 (fr) 2004-04-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98110743A Expired - Lifetime EP0899228B1 (fr) 1997-08-28 1998-06-12 Dispositif de guidage à coussin d'air

Country Status (3)

Country Link
US (1) US6279898B1 (fr)
EP (1) EP0899228B1 (fr)
JP (1) JPH11130312A (fr)

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* Cited by examiner, † Cited by third party
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DE29819402U1 (de) * 1998-10-30 1999-03-11 MAN Roland Druckmaschinen AG, 63075 Offenbach Bogenleiteinrichtung in einer Druckmaschine
DE19905095C2 (de) * 1999-02-09 2001-02-22 Roland Man Druckmasch Bogenführungseinrichtung für eine Druckmaschine
DE10057570B4 (de) * 1999-12-15 2005-11-24 Heidelberger Druckmaschinen Ag Leitvorrichtung einer flächige Bedruckstoffe verarbeitenden Maschine
DE10000308A1 (de) * 2000-01-05 2001-07-12 Heidelberger Druckmasch Ag Luftleitsystem in einer Bogendruckmaschine
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EP0899228A2 (fr) 1999-03-03
US6279898B1 (en) 2001-08-28
JPH11130312A (ja) 1999-05-18
EP0899228A3 (fr) 1999-12-08

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