EP1792861B1 - Dispositif de transport à bande sous vide pour guider une bande en mouvement - Google Patents

Dispositif de transport à bande sous vide pour guider une bande en mouvement Download PDF

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Publication number
EP1792861B1
EP1792861B1 EP06024086A EP06024086A EP1792861B1 EP 1792861 B1 EP1792861 B1 EP 1792861B1 EP 06024086 A EP06024086 A EP 06024086A EP 06024086 A EP06024086 A EP 06024086A EP 1792861 B1 EP1792861 B1 EP 1792861B1
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EP
European Patent Office
Prior art keywords
conveying device
ejector
belt conveying
gap
vacuum belt
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.)
Not-in-force
Application number
EP06024086A
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German (de)
English (en)
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EP1792861A2 (fr
EP1792861A3 (fr
Inventor
Andreas Pesch
Bernhard Schmitz
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Andritz Kuesters GmbH
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Andritz Kuesters GmbH
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Publication date
Application filed by Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of EP1792861A2 publication Critical patent/EP1792861A2/fr
Publication of EP1792861A3 publication Critical patent/EP1792861A3/fr
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Publication of EP1792861B1 publication Critical patent/EP1792861B1/fr
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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
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a vacuum belt conveyor device for guiding a moving web, in particular a web insertion strip of a paper or board web, according to the preamble of claim 1.
  • Vacuum belt conveyors for guiding a traveling web are used in various industrial plants to securely hold a web in transit. This is especially true for paper and board machines, where the web is transferred from one machine section to another machine section, for example from the wet end to the dryer section or from the dryer section to the finishing section.
  • vacuum belt conveyors in paper or board machines to facilitate threading the paper or board web into a machine for making, finishing or further processing such a web.
  • a narrow ribbon or introduction strip is separated from the running web.
  • This tape is transferred by means of the vacuum belt conveyor, for example, from the end of a machine section to the inlet area of a subsequent machine section.
  • the conveyor device comprises an air-permeable, endless conveyor belt, which runs over two rollers and a suction box or vacuum box. As a result, the insertion strip is sucked and transported to the conveyor belt.
  • a vacuum blower is provided to create vacuum or negative pressure within the suction box.
  • the vacuum blower comprises an impeller having an exhaust passage.
  • the impeller is driven by a suitable motor.
  • the suction box has one or more suction openings, via which the vacuum blower generates negative pressure in the interior of the suction box.
  • a disadvantage is the complex and large-scale construction, which is also maintenance-prone and expensive to manufacture and in operation. The sealing of the suction box is also difficult.
  • a device for transporting and guiding the Bruendauf arrangementsbandes in a paper machine which consists of a arranged around two or more guide rollers conveyor belt, which is permeable to air and within which loop devices are mounted, with which at the one run of the conveyor belt, with the Endiller technologicalband is transported, a negative pressure effect is achieved, whereby the Endiller arrangementsband is stapled to the said run and adhered to it.
  • the negative pressure is generated by air blower means mounted within the loop which comprise guide plates which extend substantially parallel to the plane of the conveyor belt and by which air blows can create a dynamic negative pressure action with which the final conveyor belt is tacked to the conveyor belt.
  • the disadvantage is that for blowing the guide plates a fairly large amount of air is required, which is to be diverted and leads to undesirable blowing currents in the area around the device.
  • the object of the invention is therefore to provide a vacuum belt conveyor device for guiding a running web, which is structurally simple and takes up little space.
  • the suction power is high and adjustable in the longitudinal and transverse directions. Due to the bypass that can be integrated with the ejector, it can be adjusted to a specific pressure difference. It is thus made a negative pressure control directly on the ejector, so that in the vicinity of the at least one ejector, a uniform pressure distribution is ensured particularly advantageous.
  • the bypass can preferably be fed with air via a regulating device, in order to avoid falling below a certain low-pressure level in the region of the inlet side.
  • the system is then self-regulating, because the bypass causes the flow conditions in the bypass to the pressure conditions on the inlet side can adjust.
  • the regulating device can be formed, for example, by a flap, a throttle or a valve.
  • the at least one bypass may be structurally integrated into a wall of the ejector or into an insert for the ejector.
  • the at least one bypass is placed in front of the inlet of the ejector.
  • a bypass In the transport direction can also be arranged in front of and behind the intake of the ejector, a bypass.
  • the bypass is preferably slot-shaped.
  • the ejector is preferably designed as a ring-gap ejector or long-gap ejector.
  • a nozzle row arrangement of at least one long-gap ejector extends transversely to the strip running direction and generates an air flow perpendicular to the band. The air flow is then simply downwards derivable, whereby obstructions are minimized by unwanted air currents in the area of the device.
  • a gap space of the at least one ejector preferably has a section with a narrowed cross section in order to achieve high efficiency. If a lower efficiency is sufficient, the gap space can also be formed without a cross-sectional constriction.
  • the at least one ejector may also operate in conjunction with a suction space, for which purpose a partition may be provided within the loop.
  • the partition is preferably arranged in the longitudinal direction of the conveyor belt and at a distance below the run, which is provided for holding the web.
  • an intake space above the dividing wall is separated from an outflow space below the dividing wall.
  • the outflow space is formed in an area above the returning other strand and may be formed open or closed to the outside. If a plurality of ejectors are arranged one behind the other in the longitudinal direction, it is also possible to provide transverse dividing walls which surround the Intake and possibly the outflow compartment divided into several successively arranged rooms. Selectable vacuum profiles along the conveyor belt are adjustable in this way.
  • a passage can be provided in the latter, which passage is provided with an adjustable regulating device, in particular a throttle.
  • a flow rate can be determined and thus set a maximum vacuum level.
  • a control in the vicinity of an ejector through the integrated at least one bypass can be done by the throttle in the remote area, an additional adjustment of the pressure conditions.
  • the arrangement of the at least one ejector can be done vertically working to the conveyor belt or at an angle to the conveyor belt.
  • the at least one ejector may have a gap space, which has a cross-sectional widening on the outflow side.
  • the outflowing air can thereby be given a better distribution.
  • the at least one ejector may have a gap whose flow path length is selectable. Consequently, the gap space can not only be used to draw in air for generating negative pressure, but at the same time can also be used for targeted removal of the air from the area of application of negative pressure.
  • the air jet injector may be arranged in a convergingly formed inlet region of the at least one ejector.
  • the orientation of the inlet region of the ejector or to the direction of the conveyor belt is selectable.
  • the inlet region can be arranged transversely or obliquely to the running direction or in the direction of travel, wherein with a plurality of ejectors, these can be arranged at a distance from or directly adjacent to one another in order to form selectable negative pressure fields.
  • selectable negative pressure fields For example, if several long-gap ejectors form a negative pressure strip in the running direction in the running direction, only one row of long-gap ejectors, for example a median strip, can be provided or several rows of long-gap ejectors can be arranged parallel to one another and spaced apart from one another, for example two edge strips.
  • Fig, 1 shows a vacuum belt conveyor 1 for guiding a moving web 2, in particular a web insertion strip of a paper or board web.
  • the vacuum belt conveyor device 1 comprises guide rollers 3 and 4, between which a conveyor belt 5 is arranged.
  • the conveyor belt 5 is endlessly guided in a loop 8 with a top strand 6 and a bottom strand 7, such as in Fig. 1 shown.
  • the conveyor belt 5 is permeable to air and consists of a cloth with sufficient permeability or a material web with hole structure.
  • the device 9 for applying a negative pressure is formed by means of at least one ejector 10, 11.
  • the ejector 10, 11 may have a polygonal or round design.
  • the at least one ejector 10, 11 is designed as a long-gap ejector.
  • the ejector 10, 11 is designed as a ring gap ejector.
  • the at least one long-gap ejector 10, 11 in each case has an air jet injector 12, 13 with a multiplicity of air outlet nozzles 14 along the inlet side 15, 16 of the extended gap 17, 18 and is positioned on the inlet side at a distance below the inside of the runway 6 provided for holding the web.
  • subsequent supply lines 21, 22 of the air jet injector 12, 13 of the at least one long-gap ejector 10, 11 fed by an air source, not shown, in order to inject air into the associated extended nip 17, 18 can.
  • the fed air flows at high speed through the air outlet nozzles 14, whereby air is sucked in on the inlet side 15, which is located in the head-side environment of the at least one long-gap ejector 10, 11.
  • a negative pressure on the inside of the run 6 can be applied by one or more air nozzles are mounted below the belt 5.
  • the pressure of the supplied air is adjustable, which can influence the suction power. If a plurality of long-gap ejectors 10, 11 are arranged one behind the other in the running direction, they can receive the same or different air supply, in order to thereby design individually adjustable suction power profiles in the transport direction T.
  • the long-gap ejector 10 has a substantially rectangular shape and has an air jet injector 12.
  • the air jet injector 12 is formed by a nozzle 19, which is arranged in the gap longitudinal direction and generates an air flow in the gap 20 of the extended gap 17.
  • the nozzle assembly 19 is preferably recessed with respect to the inlet side 15, whereby the air sucked in on the inlet side is directed into the gap 20.
  • the air jet injector 12 is seated in a converging inlet region 23 of the long-gap ejector 10, wherein the short side edges 24, 25 of the extended-nip 17 are preferably rounded.
  • the extended nip 17 of the long-gap ejector 10 can delimit the gap 20 with parallel surfaces from the inlet side 15 to an outlet side 26, that is to say extend without a narrowed cross-section (cf. Fig. 12a, 12b ). It is preferred to form the gap 20 with a narrowed cross-section for a high efficiency.
  • the inlet region 23 with converging side surfaces then extends below the air jet injector 12. The constriction in the cross section of the extended nip 17 promotes the formation of a closed flow and thus an advantageous sealing of the Beerstrahlejektors 12.
  • the suction of a long-gap ejector 10, 11 at the inlet side 15 is controllable via the fed air flow and by the shape of the extended gap 17 between the inlet side 15 and outlet side 26. DieShuff des Long gap 17 in the flow direction is selectable and opens up an advantageous discharge of air.
  • the extended gap 17 is preferably formed with an enlarged cross-sectional portion 40, whereby the outflow behavior of the long-gap ejector 10 is improved with respect to a wide air outlet distribution.
  • the outflowing air can be diverted away from the device 1 by additional or alternative means, possibly also by exhaust air ducts.
  • the extended nip 17 preferably has a section with parallel side surfaces, which can make up about 50 to 80% of the total length of the extended nip 17 in the flow direction between inlet side 15 and outlet side 26.
  • the extended nip 17 thus forms a guide channel for the air flow with a selectable flow path length.
  • a vacuum belt conveyor device comprises the device 9 for applying negative pressure two long-gap ejectors 10, 11, which are arranged in the transport direction T at a distance one behind the other.
  • the number of juxtaposed long-gap ejectors 10, 11 can be selected.
  • the distance from the inside of Trumms 6 is also selectable and depends on the intake. A minimum distance ensures that a suction area, although local, but sufficiently flat.
  • the extent of the extended nip 17 in the longitudinal direction of the gap can be selected as a function of a width of the conveyor belt 5, so that it is sucked over the entire width of the conveyor belt 5.
  • the long-gap ejector (s) 10, 11 can be arranged at selectable locations, that is to say be positioned where a suction characteristic is desired.
  • the air jet injector 12 with the associated nozzle assembly 19 preferably extends transversely to the strip running direction T and generates an air flow perpendicular to the belt 5.
  • the long-gap ejectors 10, 11 are arranged to operate perpendicularly to the transport belt 5.
  • a holder 27 For positioning the at least one long-gap ejector 10, 11, a holder 27 is provided, which holds the long-gap ejectors 10, 11 stationary in the loop 8.
  • the long-gap ejectors 10, 11 can furthermore be arranged freestanding in the loop 8.
  • the holder 27 may be formed by a frame of the device 1, in which the guide rollers 3, 4 are mounted.
  • the conveyor belt 5 is moved in the transport direction T by at least one driven deflection roller 3, 4.
  • a drive motor 28 is provided for the deflection roller 3.
  • support grid not shown, may be provided.
  • At least one bypass 41, 42 is integrated from the outer space to the inlet side 15, 16 on the ejector, which is designed here as a long-gap ejector 10, 11.
  • the at least one bypass 41, 42 is placed in a wall 43, 44 of the long-gap ejector 10, 11 and preferably extends from a side region of the wall 43, 44 within a half of the gap 17, 18 facing away from the inlet side 15, 16 toward the inlet side 15 16. From an outside space with higher pressure then air can flow to the inlet side 15, where an adjustable negative pressure is applied.
  • the at least one bypass 41, 42 preferably has a regulating device 45 for a self-adjusting adjustment of a pressure difference.
  • the regulating device 45 here is a spring-loaded flap which opens the bypass 41, 42 in an adjustable manner when a certain level of negative pressure is reached at the inlet side 15.
  • the at least one bypass 41, 42 is preferably slot-shaped and terminates at the inlet side 15, 16 preferably in the transport direction T in front of and / or behind the gap 17, 18 of the long-gap ejectors 10, 11.
  • Fig. 2 shows the regulator 45 closed, ie the bypass 41, 42 is inactivated.
  • the regulator 45 may alternatively be formed by a throttle or a valve.
  • a partition wall 29 is disposed within the loop 8.
  • the partition wall 29 separates an intake space 33, 34, in which the inlet side 15 of the at least one long-gap ejector 10, 11 is arranged with its respective inlet, from an outflow space 35, 36, in which the outlet side 26 of the at least one long-gap ejector 10, 11 with its respective outlet is arranged.
  • the partition wall 29 preferably extends substantially parallel to the conveyor belt 5.
  • the suction chamber 33, 34 preferably forms an upper chamber and the outflow space 35, 36 a lower chamber, which are bounded laterally by cover plates 31, 32 with respect to the guide rollers 3, 4th
  • the suction chamber 33, 34 is bounded at the top by the run 6 of the air-permeable conveyor belt 5.
  • the limitation can be made upward through a perforated plate on which the run 6 runs out.
  • the distribution as well as the opening widths of the holes allow an influence on the negative pressure characteristic on the inside of the run 6.
  • the outflow space 35, 36 is bounded below by the returning Trumm 7.
  • the at least one long-gap ejector 10, 11 sucks in the air from the respective intake space 33, 34, whereby an intake field corresponding to the intake space 33, 34 is applied to the inside of the run 6.
  • the distance of the inlet side 15 of the at least one long-gap ejector 10, 11 from the inside of the run 6 can be selected to be greater than in the free-standing long-gap ejector 10, 11 according to Fig. 2 .
  • the inlet side 15 is preferably positioned in a middle region of the suction space 33, 34.
  • Fig. 6b The operation of the at least one bypass 41, 42, in the representation of Fig. 6a is activated is in Fig. 6b shown in detail.
  • the regulating device in the form of a flap 45 is pivoted against the bias of a spring 46, whereby the bypass 41, 42 is opened. Air from the outer space, in this case the outflow space 35, flows through the bypass 41, 42 to the inlet side 15, 16 and the suction space 33.
  • the flap 45 opens when the pressure difference between the outer space, here the outflow space 35, and the inlet side 15, 16 the long-gap ejectors 10, 11 exceeds an adjustable value, so that the bypass 41, 42 exercises its balancing function. As a result, no further negative pressure builds up from a certain negative pressure value, since the bypass flow now corresponds to the suction flow, as illustrated by the flow arrows shown.
  • Fig. 6c shows an alternative embodiment of the bypass 41, 42.
  • the bypass 41, 42 is placed here in an insert 48 for the long-gap ejector 10, 11.
  • the regulating device is a flap 45, which is fastened to a resistance-compensated joint 47. By the articulation of the flap 45 in a negative pressure region, for example, the suction chamber 33, the flap 45 opens to the outside and not in the bypass 41, 42. The effect corresponds to the way to Fig. 6b described mode of action.
  • a slot shape of the bypass 41, 42 ensures during the compensation that, for example, in the transverse direction to the conveyor belt 5 always forms a uniform pressure distribution.
  • the system is self-regulating because the bypass 41, 42 causes the flow conditions in the bypass 41, 42 to adjust to the pressure ratios across the bypass 41, 42.
  • an adjustable throttle 37, 38 is arranged in the partition wall 29.
  • About the throttle 37, 38 can flow between a Intake space 33, 34 and an outflow space 35, 36 determines and thus a maximum vacuum level in a suction chamber 33, 34 are set.
  • a maximum negative pressure in the suction space 33, 34 can be defined via such a bypass between intake space 33, 34 and outflow space 35, 36. From a certain negative pressure value, no further negative pressure builds up, since then the bypass flow via the throttle 37, 38 corresponds to the suction flow. A certain pressure difference is adjusted.
  • the vacuum level is also adjustable. The risk that especially wet paper or board webs are damaged on the conveyor belt 5 by over-suction, therefore, does not exist.
  • Each intake chamber 33, 34 with associated outflow space 35, 36 is preferably associated with a throttle 37, 38.
  • the drive power of the motor 28 can be kept small by limiting the vacuum level.
  • the bypass 41 in the vicinity compensate, while the throttle 37, 38 allows this in a long-range.
  • the long-gap ejectors 10, 11 here preferably have only one bypass 41 in the transport direction T in front of the gap of the ejector 10, 11.
  • the throttle 37, 38 is in each case arranged in the transport direction T behind the long-gap ejector 10, 11.
  • the combination of two compensation functions optimizes the even pressure distribution for holding and guiding the paper and board web depending on the moisture content. Incidentally, the above statements apply to the first and second embodiments accordingly.
  • FIG. 8 illustrated fourth embodiment of the vacuum belt conveyor device 1 differs from the in Fig. 7 illustrated third embodiment in that the at least one long-gap ejector 10, 11 is not arranged perpendicular to the conveyor belt 5 working, but is arranged working at an angle to the conveyor belt.
  • the long-gap ejectors 10, 11 are inclined or tilted to the transport plane of the conveyor belt 5.
  • the suction is the outflow with respect to the transport direction T leading or trailing formable.
  • the in the Fig. 9 to 11 illustrated embodiments of the vacuum belt conveyor device 1 relate to different arrangements of at least two long-gap ejectors 10, 11 with respect to the running direction T.
  • a first long-gap ejector 10 is positioned transversely to the direction of travel T, while a second spaced-apart long-gap ejector 11 is arranged obliquely to the transport direction T.
  • the order can also be reversed.
  • Both long-gap ejectors 10, 11 are arranged obliquely to the transport direction T.
  • the angle to the transport direction T is selectable depending on the choice of the vacuum profile that can be generated thereby.
  • the long-gap ejectors 10, 11 are arranged in a row one behind the other to form a suction strip 39.
  • This suction strip 39 can, as in FIG Fig. 11 represented form a median strip.
  • an edge strip or edge strips on both sides may be provided.
  • the Fig. 12a shows an eighth embodiment of the vacuum belt conveyor device 1, which differs from the above embodiments in that the extended nip 17, 18 has no cross-sectional constriction, that has parallel side walls. The efficiency is lower, so that the long-gap ejector 10, 11 is preferably arranged closer to the inside of the run 6 of the conveyor belt 5.
  • the comments on the first embodiment according to Fig. 2 corresponding.
  • the Fig. 12b shows a ninth embodiment of the vacuum belt conveyor device 1, which differs from the first embodiment according to Fig. 1 and 2 characterized in that the ejectors 10, 11 are annular gap ejectors.
  • the long-gap ejectors of the exemplary embodiments two to eight can also be replaced by ring-gap ejectors.
  • the vacuum belt conveyor device 1 can also operate rotated through 180 °, i. the negative pressure at the returning Trumm be applied with appropriate rotation of the ejectors and reversing the transport direction.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Advancing Webs (AREA)
  • Belt Conveyors (AREA)

Claims (32)

  1. Dispositif de transport à bande sous vide pour guider une bande en mouvement (2), en particulier l'entame d'une bande en papier ou en carton, comprenant une bande de transport (5) poreuse sans fin, ayant un bout supérieur (6) et un bout inférieur (7) et conduite selon une boucle (8), et un dispositif (9) aménagé au sein de la boucle (8) pour créer une dépressurisation sur la face interne d'un des bouts (6) de la bande de transport (5) pour maintenir la bande (2) sur la bande de transport (5), caractérisé en ce que le dispositif (9) pour créer une dépressurisation est formé par au moins un éjecteur (10, 11) présentant à chaque fois un injecteur de flux d'air (12) ayant une pluralité de buses de sortie d'air (14) le long de la face d'entrée (15, 16) de la fente (17, 18) de l'éjecteur (10, 11), et étant également positionné à distance de la face d'entrée sous la face interne du bout (6) prévu pour maintenir la bande (2), et qu'au moins une dérivation (41, 42) est intégrée depuis l'espace extérieur vers la face d'entrée (15,16) de l'éjecteur (10, 11).
  2. Dispositif de transport à bande sous vide selon la revendication 1, caractérisé en ce que ladite au moins une dérivation (41, 42) est intégrée dans une paroi (43, 44) de la fente (17, 18).
  3. Dispositif de transport à bande sous vide selon la revendication 1, caractérisé en ce que ladite au moins une dérivation (41, 42) est intégrée dans un insert (48) pour ledit au moins éjecteur (10, 11).
  4. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 3, caractérisé en ce que ladite au moins une dérivation (41, 42) est positionnée avant la fente (17, 18) dans le sens de transport (T) de la bande de transport (5).
  5. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 4, caractérisé en ce qu'une dérivation (41, 42) est intégrée dans la paroi (43, 44) respectivement avant et après la fente (17,18) dans le sens de transport (T) de la bande de transport (5).
  6. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 5, caractérisé en ce que la dérivation (41, 42) peut être approvisionnée en air par l'intermédiaire d'un appareil de régulation.
  7. Dispositif de transport à bande sous vide selon la revendication 6, caractérisé en ce que l'appareil de régulation est un étranglement, un clapet ou une soupape.
  8. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 7, caractérisé en ce que ladite au moins une dérivation (41, 42) s'étend depuis un domaine latéral de la paroi (43, 44) au sein d'une moitié de la fente (17, 18), délimitée à partir la face d'entrée (15, 16), jusqu'à la face d'entrée (15, 16).
  9. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 8, caractérisé en ce que l'éjecteur est un éjecteur à fente annulaire.
  10. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 8, caractérisé en ce que l'éjecteur est un éjecteur à fente longitudinale.
  11. Dispositif de transport à bande sous vide selon la revendication 10, caractérisé en ce que ladite au moins une fente longitudinale (10, 11) produit un écoulement dans un espace de fente (17, 18) via une buse (19) agencée dans le sens longitudinal de la fente.
  12. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 11, caractérisé en ce qu'un espace de fente (20) est façonné avec une section réduite.
  13. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 12, caractérisé en ce qu'un mur de séparation (29) est agencé au sein de la boucle (8), qui sépare un espace d'aspiration (33, 34) dans lequel est disposée la face d'entrée (15, 16) dudit au moins un éjecteur (10, 11), d'un espace d'écoulement (35, 36), dans lequel est disposée la face de sortie (26) dudit au moins un éjecteur (10, 11).
  14. Dispositif de transport à bande sous vide selon la revendication 13, caractérisé en ce que l'espace d'aspiration (33, 34) et d'écoulement (35, 36) présente des cloisons transversales (30) entre des éjecteurs (10, 11) voisins.
  15. Dispositif de transport à bande sous vide selon la revendication 13 ou 14, caractérisé en ce que l'espace extérieur, depuis lequel s'étend ladite au moins une dérivation (41, 42) jusqu'à la face d'entrée (15, 16), est formé par l'espace d'écoulement (35, 36).
  16. Dispositif de transport à bande sous vide selon l'une des revendications 13 à 15, caractérisé en ce que l'espace d'aspiration (33, 34) peut être connecté, afin de contrôler le débit d'écoulement, à l'espace d'écoulement (35, 36) via au moins un étranglement (37, 38) dans la paroi de séparation (29) pour limiter la dépressurisation.
  17. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 16, caractérisé en ce que ledit au moins un éjecteur (10, 11) est disposé perpendiculairement à la bande de transport (5) en marche.
  18. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 17, caractérisé en ce que ledit au moins un éjecteur (10, 11) est disposé selon un angle par rapport à la bande de transport (5) en marche.
  19. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 18, caractérisé en ce que ledit au moins un éjecteur (10, 11) présente à chaque fois un espace de fente (20), qui possède une portion de sortie (40) de section élargie.
  20. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 19, caractérisé en ce que ledit au moins un éjecteur (10, 11) présente un espace de fente (20) de longueur d'écoulement à choix.
  21. Dispositif de transport à bande sous vide selon la revendication 20, caractérisé en ce que la longueur d'écoulement de l'espace de fente (20) à section réduite représente 50 à 80 % de la longueur d'écoulement totale de l'espace de fente (20).
  22. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 21, caractérisé en ce que l'injecteur de flux d'air (12) est disposé dans un domaine d'entrée convergent (23) d'un éjecteur à fente longitudinale (10, 11).
  23. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 22, caractérisé en ce qu'au moins un éjecteur à fente longitudinale (10, 11) est disposé transversalement par rapport à la direction du mouvement de la bande de transport (5).
  24. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 23, caractérisé en ce qu'au moins un éjecteur à fente longitudinale (10, 11) est disposé de manière oblique par rapport à la direction (T) du mouvement de la bande de transport (5).
  25. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 24, caractérisé en ce que plusieurs éjecteurs (10, 11) sont disposés au voisinage les uns des autres dans la direction (T) du mouvement de la bande de transport (5).
  26. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 25, caractérisé en ce que, selon la longueur de la bande de transport (5), au moins 2 éjecteurs (10, 11) sont disposés à distance l'un de l'autre dans la direction (T) du mouvement de la bande de transport (5).
  27. Dispositif de transport à bande sous vide selon la revendication 25 ou 26, caractérisé en ce que des éjecteurs à fente longitudinale (10, 11) sont agencés longitudinalement dans la direction (T) du mouvement de la bande de transport (5) sous la forme d'au moins une bande d'aspiration (39).
  28. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 27, caractérisé en ce qu'au moins un éjecteur (10, 11) présente un domaine d'admission avec des arêtes latérales (24) courtes et arrondies.
  29. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 28, caractérisé en ce qu'au moins un injecteur de flux d'air (10, 11) peut être alimenté par des canaux d'approvisionnement (21, 22) disposés sur les côtés de la bande de transport (5).
  30. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 29, caractérisé en ce qu'un espace d'écoulement (35, 36) pour régler la dérivation de l'air évacué est encapsulable.
  31. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 30, caractérisé en ce que de l'air peut être approvisionné audit au moins un injecteur de flux d'air (10, 11) via un canal d'approvisionnement (21, 22), et que la pression de l'air est réglable.
  32. Dispositif de transport à bande sous vide selon l'une des revendications 1 à 31, caractérisé en ce que plusieurs éjecteurs (10, 11) sont agencés au voisinage les uns des autres, et que de l'air peut être approvisionné à chaque canal d'approvisionnement (21, 22) avec une pression réglable.
EP06024086A 2005-11-30 2006-11-21 Dispositif de transport à bande sous vide pour guider une bande en mouvement Not-in-force EP1792861B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005057427A DE102005057427A1 (de) 2005-11-30 2005-11-30 Unterdruck-Bandfördervorrichtung zum Führen einer laufenden Bahn

Publications (3)

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EP1792861A2 EP1792861A2 (fr) 2007-06-06
EP1792861A3 EP1792861A3 (fr) 2009-02-18
EP1792861B1 true EP1792861B1 (fr) 2010-08-18

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EP06024086A Not-in-force EP1792861B1 (fr) 2005-11-30 2006-11-21 Dispositif de transport à bande sous vide pour guider une bande en mouvement

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EP (1) EP1792861B1 (fr)
AT (1) ATE478026T1 (fr)
DE (2) DE102005057427A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2016076223A1 (ja) * 2014-11-14 2017-08-24 株式会社瑞光 着用物品におけるシート状物の搬送装置および搬送方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234631A1 (de) * 1972-07-14 1974-01-31 Kabel Metallwerke Ghh Abzugsvorrichtung fuer druckempfindliches gut
FI69145C (fi) * 1984-07-05 1985-12-10 Valmet Oy Anordning i en pappersmaskin vid transport och styrning av banans spetsdragningsband
EP0819792B1 (fr) * 1996-07-20 2000-11-02 Voith Sulzer Finishing GmbH Procédé de guidage d'une bande de papier en mouvement ou au moins de la bande d'enfilement coupée de cette bande
FI112267B (fi) * 1998-09-29 2003-11-14 Metso Paper Inc Laite paperikoneessa rainan päänvientinauhan kuljetuksessa ja ohjauksessa
DE20001082U1 (de) * 2000-01-22 2000-04-13 Langbein & Engelbracht GmbH, 44879 Bochum Anordnung zur Führung einer flexiblen Materialbahn
DE10009188A1 (de) * 2000-02-26 2001-08-30 Voith Paper Patent Gmbh Vakuum-Bandfördervorrichtung

Also Published As

Publication number Publication date
EP1792861A2 (fr) 2007-06-06
DE102005057427A1 (de) 2007-05-31
ATE478026T1 (de) 2010-09-15
EP1792861A3 (fr) 2009-02-18
DE502006007677D1 (de) 2010-09-30

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