EP3747808B1 - Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure - Google Patents

Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure Download PDF

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Publication number
EP3747808B1
EP3747808B1 EP20177978.2A EP20177978A EP3747808B1 EP 3747808 B1 EP3747808 B1 EP 3747808B1 EP 20177978 A EP20177978 A EP 20177978A EP 3747808 B1 EP3747808 B1 EP 3747808B1
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EP
European Patent Office
Prior art keywords
blanks
belt
stack
compensating
feed
Prior art date
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EP20177978.2A
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German (de)
English (en)
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EP3747808A1 (fr
Inventor
Fabrizio FAZZIOLI
Massimo Fortini
Stefano Villa
Luca Federici
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GD SpA
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GD SpA
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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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • B65H1/025—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with controlled positively-acting mechanical devices for advancing the pile to present the articles to the separating device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/04—Endless-belt separators
    • B65H3/045—Endless-belt separators for separating substantially vertically stacked articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/12—Suction bands, belts, or tables moving relatively to the pile
    • B65H3/124—Suction bands or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • 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
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • 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
    • B65H2515/30—Forces; Stresses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard

Definitions

  • This invention relates to a device and a method for feeding blanks to a machine for further processing.
  • the invention addresses the field of the processing of blanks - for example (but not necessarily) of paper - for example in the sector of the production of packets, where blanks of rigid or semi-rigid material are folded and welded or glued to form packets for containing articles.
  • the context of this invention is the production of packets of rod-shaped articles such as cigarettes or the like.
  • the prior art teaches feeding blanks in a stack where the blanks, which are planar shaped, are superposed on each other to define a succession of blanks whose large surfaces are in mutual contact.
  • the stack of blanks is fed to a guide channel where the stack is progressively advanced so that the blank at the end of it in the outfeed direction is presented to a pickup device which transfers it for further processing, such as, for example, folding processes.
  • the stack may be inserted in an inclined or vertical guide channel along which it is pushed by gravity or it may be urged towards the pickup device by suitable pushing elements, such as elastic elements, for example.
  • suitable pushing elements such as elastic elements, for example.
  • At the outfeed end of the guide channel there is at least one stop element configured to hold back the stack of blanks.
  • the height of the stack is reduced, making it necessary to top up with more blanks, usually by periodically adding a bundle of new blanks.
  • This invention therefore has for an aim to provide a device and a method for feeding blanks to a machine for further processing and capable of attaining high standards of process reliability.
  • the numeral 1 in the accompanying drawings denotes in its entirety a device for feeding blanks 100 to a machine for further processing.
  • machine for further processing is used to mean a generic machine (not illustrated because it is of known type) configured to receive single blanks one after the other in succession and to subject them to further
  • a singulating feeder which picks up the foremost articles of a stack and remove them, in an ordered succession, one after the other by means of a vacuum powered singulation device. processes, such as, for example: folding, gluing, printing, application of additional elements (such as stamps, coupons, labels or generic stickers) or even to transfer the blanks to storage units.
  • a machine might be a cigarette packing machine and the device 1 configured to feed the cardboard blanks intended to make hinge-lid packets.
  • the device 1 comprises feed means 2 for feeding a stack P of blanks 100 disposed in succession in a superposed configuration, for example defining a feed space for feeding the stack P of blanks 100 along a feed direction A.
  • the feed direction A is horizontal and the blanks 100 of the stack P can be pushed towards an outfeed section 3 by a generic mechanical pushing element (not illustrated), for example elastic, adapted to generate a force F directed towards the outfeed section 3.
  • the blanks 100 are positioned in a vertical or substantially vertical plane.
  • the feed direction A may be inclined at an angle to the horizontal plane, preferably an acute angle between 1° and 30°. In such a case, the stack P of blanks 100 is pushed towards the outfeed section 3 at least partly by gravity.
  • the feed means 2 comprise at least a fixed bottom wall 12 delimiting at least part of a bottom side of the feed space.
  • a transfer device 200 of known type
  • stop elements 4 may differ in number and/or location, provided always that they perform the same function of controlling the release of the end blank 100 to be picked up by the transfer device 200.
  • At least one stop element 4a for blocking the feed movement of the stack P and positioned preferably in such a way as to intercept and block a lower part of the stack P, hence located at a position such that it is positioned upstream (or on the leading edge) of the end blank 100 along the trajectory of the transfer device 200.
  • the stop element 4a may be fixed.
  • an additional stop element (not illustrated), preferably fixed, positioned in such a way as to intercept and block an upper part of the stack P.
  • the feed means 2 also comprise at least one compensating belt 6 having an upper section 7 running parallel to the feed direction A of the stack P of blanks 100 and defining a bottom support of a predefined portion of the stack of blanks 100 so that the predefined portion of the stack P rests, preferably rests exclusively on, the upper section 7 of the compensating belt 6.
  • the "predefined portion" of the stack P refers to the part of the stack P positioned on top of the upper section 7 of the compensating belt 6 and whose length, along the feed direction A, is constant over time.
  • the operating section 7 of the compensating belt 6 has a length L of between 20 and 40 cm (for example, 27 cm) along the feed direction A and/or ends at a distance d of between 10 and 15 cm (for example, 13 cm) from the end blank 100.
  • the upper section 7 of the compensating belt 6 is raised above the fixed bottom wall 12, so that the blanks 100 are not in sliding contact with the bottom wall 12 as they advance and are not therefore slowed by friction with the bottom wall 12.
  • the operating section 7 of the compensating belt 6 lies in a plane (horizontal in the embodiment shown in the accompanying drawings but in any case preferably parallel to the bottom wall 12) is preferably at a height between 0.2 and 2 mm (for example, 0.5 mm) above the bottom wall 12.
  • the compensating belt 6 is a suction belt connected to a source of pneumatic suction (not illustrated).
  • the compensating belt 6 is provided with a plurality of through holes 8 configured to transmit the pneumatic suction and disposed along a feed direction A of the belt 6.
  • the holes are between 4 and 15 mm (for example, 8 mm) in diameter.
  • the holes 8) are disposed along one or more rows parallel to the feed direction A of the compensating belt 6.
  • the holes 8 are disposed along two rows parallel to the feed direction A, where the holes 8 of the first row are not completely aligned with the holes 8 of the second row, so that all the blanks 100 resting on the compensating belt 6 are subjected to suction.
  • the compensating belt 6 (which may be a toothed belt) is driven by a respective drive pulley 9, connected to a respective drive unit, not illustrated.
  • the compensating belt 6 is preferably made of a non-porous flexible material, specifically rubber or elastomeric material.
  • the compensating belt 6 may be made of porous material, with or without the holes 8.
  • the device 1 further comprises, under the upper section 7 of the compensating belt 6, a suction support panel 10 configured in such a way that each hole 8 of the upper section 7 of the compensating belt 6 remains connected to the pneumatic suction source as the compensating belt 6 advances.
  • the upper section 7 of the compensating belt 6 may be disposed in sliding support relationship on the support panel 10.
  • the support panel 10 is flat and is provided with at least one elongate recess 11 connected to the pneumatic suction source and aligned with a feed trajectory of the holes 8 so it is simultaneously connected to a plurality of holes 8.
  • connection of the recess 11 to the suction source may be accomplished by providing the recess 11 with respective suction ports 11a, or holes, connected at the bottom to the pneumatic suction source.
  • the suction ports 11a are disposed in succession along the feed direction A, at a different spacing compared to the holes 8 of the compensating belt 6, specifically at a smaller spacing ( Figure 4 ).
  • the support panel 10 may have two or more elongate recesses 11 which, in that case, are separated from each other by a separating wall 11b whose size, along the feed direction A, is smaller than the diameter of the holes 8 of the compensating belt 6.
  • the device 1 comprises two compensating belts 6 running side by side and disposed symmetrically about a longitudinal feed plane (perpendicular to the blanks) of the stack P of blanks 100.
  • the compensating belt 6 is associated with adjustment means configured to adjust the feed speed of the compensating belt 6 in such a way as to vary the pushing action on the stop element 4a.
  • the adjustment means comprise at least one thrust sensor (not illustrated) associated with the at least one stop element 4a and a control unit configured to vary the feed speed of the compensating belt 6, specifically by feedback, as a function of the thrust value measured by the at least one thrust sensor.
  • the control unit is preferably configured to keep the thrust value of the stack P of blanks 100 on the at least one stop element 4a constant, specifically at a predetermined or settable value.
  • the thrust sensor comprises, for example, an analogue sensor or a load cell, applied on at least one of the stop elements 4, 4a.
  • the thrust sensor is applied on at least on stop element: for example, the bottom one (preferred). Where the feed direction A is horizontal, however, it is preferable for each stop element 4, 4a to be associated with a respective thrust sensor.
  • the device 1 preferably comprises a support surface 16 which is configured to support the stack P of blanks 100 and above which there is a levelling device 13, configured and/or disposed to operate on a portion of the stack P of blanks 100 resting on the support surface 16 to push the single blanks 100 against the support surface 16 and aligns them with each other.
  • the configuration of the levelling device 13 is selected between a belt (embodiment shown in Figure 1 ), a roller or a fixed (elastically deformable) baffle.
  • the device 1 further comprises, between the compensating belt 6 and the stop element 4, 4a, at least one aligning belt 14 disposed and/or configured to come into local contact with an outfeed end stretch P2 of the stack P of blanks 100 and in such a way as to ensure that each blank 100 of the outfeed end stretch P2 is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt 14 on the blanks of the outfeed end stretch P2.
  • the aligning belt 14 has the effect of locally deforming the blanks 100 of the outfeed end stretch P2, specifically through local acceleration or deceleration performed by the aligning belt 14 so as to bring forward the rearmost zones of the blanks or to hold back the frontmost portions, thus causing the blanks 100 to gradually adopt a shape as planar as possible in a plane perpendicular to the feed direction of the stack P ( Figure 5 ).
  • the aligning belt 14 has a respective drive device (not illustrated: a motor-driven pulley, for example) and is fed at a higher or lower speed than the feed speed of the stack P of blanks 100. Further, this feed speed is different, hence higher or lower, than the feed speed of the compensating belt 6.
  • the purpose of the aligning belt 14 is to come into contact with a perimeter portion of each blank 100 of the outfeed end stretch P2 of the stack P of blanks 100 so as to bring forward or hold back the perimeter portion relative to the rest of the blank 100 in order to reduce or eliminate curvatures or bulges in the blanks 100.
  • the blanks 100 of the outfeed end stretch P2 of the stack P of blanks 100 bulge forward - that is to say, have a backward facing concavity, where the lateral edges lag behind - the aligning belt 14 could compensate for the bulge by locally accelerating the lagging edge, thereby varying the positioning plane of the blank 100 so as to give the blank a "flatter” shape.
  • a backward bulge - that is to say, a blank 100 with a forward facing concavity, where the lateral edges are at the front - can be reduced or eliminated by slowing the aligning belt 14 that is in contact with the edges at the front.
  • the aligning belt 14 may be disposed below and/or beside the blanks 100 relative to their feed direction A and, in some cases, above them.
  • This configuration can advantageously serve to reduce or eliminate forward facing bulges of the blanks 100, specifically curvatures of the blanks about a substantially vertical axis (having the shape of a C in the plan view of Figure 5 ).
  • the aligning belts 14 are in contact with lagging (laterally outermost) portions of the bottom edge of the blanks 100 and accelerating these portions would make the blanks 100 at the outfeed end P2 of the stack P adopt a flatter shape which makes them easier to be picked up by the transfer device 200.
  • the aligning belts 14 are preferably positioned under the stack of blanks and their respective upper sections 15 are parallel, preferably coplanar, with the upper sections 7 of the compensating belts 6.
  • the lateral aligning belt has a lateral operating section positioned parallel to the feed direction A of the stack P of blanks 100 and defining a lateral support for the end portion P2, so that the latter laterally abuts the lateral operating section of the aligning belt to support it, preferably to exclusively support it.
  • aligning belts 14 are advantageous in the case of blanks 100 made of recycled or thin card material which tend to bend, hence bulge, more easily, whilst the use of a single aligning belt 14 is recommended in the case of material of non-uniform thickness (for example, a stack of blanks with labels on them, hence thicker where the labels are).
  • the aligning belt 14 may act on a respective side or perimeter portion of the blanks 100 which the stop element 4 does not act on.
  • the aligning belt 14 and the stop element 4 act on respective, different sides or perimeter portions of the blanks 100, so as not to interfere with each other.
  • the aligning belt 14 and the stop element 4 may act on the same sides or perimeter portions of the blanks 100.
  • the operating section (in contact with the blanks 100, specifically at the bottom, side, or top thereof) of the aligning belt 14 has a length I of between 15 and 45 mm (for example, 30 mm) and terminates preferably at the end blank 100 or in the proximity thereof.
  • the aligning belt 14 acts on a different stretch or section of the stack P of blanks 100 than the compensating belt 6, specifically further downstream thereof.
  • the compensating and aligning actions do not interfere with each other but take place at different positions and instants.
  • the aligning belt 14 and the compensating belt 6 might be partly opposite to each other in the direction orthogonal to the feed direction A. In that case, a part of the blanks might be subjected simultaneously to the compensating and aligning action.
  • the aligning belt 14 is made of flexible, preferably non-porous material, specifically rubber or elastomeric material, and may be a toothed belt.
  • the aligning belt 14 may have a porous and/or perforated configuration to act as a suction belt or, alternatively, it may be a non-suction belt acting on the blanks 100 only by friction.
  • the feed speed of the aligning belt 14 may be adjusted by feedback as a function of the shape of the blanks (detected, for example, by sensors, optical sensors, for example) or, alternatively, it may be kept constant at a predetermined or presettable value.
  • the thrust sensor detects the instantaneous pushing action applied by the stack P on the respective stop element 4 and sends a corresponding signal to the control unit which, based on the value transmitted with the signal, instantaneously corrects the feed speed of the compensating belt 6 by actuating the drive unit of the belt 6 accordingly.
  • the control unit may compare the value of the pushing action measured and a predetermined or presettable reference value and, based on the comparison, determines the extent of the corrective action to be applied to the feed speed of the compensating belt 6.
  • the blanks of the end stretch P2 of the stack P are operated on by the aligning belt 14 which is, for example, set to a feed value determined as a function of the corrective action to be applied on the shape of the blanks 100, specifically to locally vary the speed of a peripheral zone of the blanks 100 of the end stretch P2, in such a way as to locally deform the blanks 100, varying the geometry of the positioning plane to compensate the curvature or bulging of the blanks.
  • the feed speed of the aligning belt 14 is thus selected in such a way that it is greater than or less than the feed speed of the stack P of blanks 100.
  • the present invention achieves the preset aims, overcoming the disadvantages of the prior art.
  • the action of the compensating belts allows keeping constant the thrust applied by the stack of blanks on the end blank (hence on the stop element), ensuring the optimum conditions for the transfer device to pick up the blanks.
  • the suction applied by the compensating belt allows removing the air between the blanks above, which are thus made to adhere more closely to each other to form a compact block of blanks.
  • This compact block, held by the suction of the compensating belt also acts as a "screen" against the variable pushing action of the trailing end of the stack of blanks, thereby making the pushing action applied on the end blank (hence on the stop element) even more uniform.
  • the action of the aligning belts allows stabilizing the shape of the blanks in the proximity of the transfer device (making them flatter), thereby increasing the reliability with which the single blanks at the end of the stack are picked up.

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Claims (18)

  1. Dispositif pour alimenter des flans (100) dans une machine de transformation ultérieure, en particulier dans une machine d'emballage, comprenant :
    - des moyens d'alimentation (2) pour alimenter une pile (P) de flans (100) disposés en succession dans une configuration superposée ;
    - au moins un élément d'arrêt (4) disposé à une première extrémité (P1) de la pile (P) de flans (100) et configuré pour retenir la pile (P) de flans (100) ;
    dans lequel les moyens d'alimentation (2) sont configurés pour alimenter la pile (P) de flans (100) de telle sorte que la pile (P) de flans (100) est soumise à une action de poussée (F) en direction de l'au moins un élément d'arrêt (4, 4a), en particulier par gravité et/ou au moyen d'un élément de poussée appliqué à une deuxième extrémité de la pile (P), opposée à la première extrémité (P1) ;
    les moyens d'alimentation (2) comprennent également au moins une courroie de compensation (6) ayant une section supérieure (7) s'étendant parallèlement à la direction d'alimentation (A) de la pile (P) de flans (100) et définissant un support inférieur d'une portion prédéfinie de la pile (P) de flans (100) de sorte que la portion prédéfinie de la pile (P) repose, de préférence repose exclusivement, sur la section supérieure (7) de la au moins une courroie de compensation (6), et en ce que la courroie de compensation (6) est associée à des moyens de réglage configurés pour régler la vitesse d'alimentation de la courroie de compensation (6) de manière à modifier la poussée sur l'élément d'arrêt (4) ; caractérisé en ce que la courroie de compensation (6) est une courroie d'aspiration reliée à une source d'aspiration pneumatique et en ce que le dispositif comprend, entre la au moins une courroie de compensation (6) et l'au moins un élément d'arrêt (4, 4a), au moins une courroie d'alignement (14) disposée et/ou configurée pour venir en contact local avec un tronçon d'extrémité de sortie (P2) de la pile (P) de flans (100) et de manière à assurer que chaque flan (100) du tronçon d'extrémité de sortie (P2) est progressivement alignée sur un plan de positionnement, spécifiquement par accélération ou décélération localisée effectuée par la courroie d'alignement (14).
  2. Dispositif selon la revendication 1, dans lequel les moyens de réglage comprennent au moins un capteur de poussée associé à l'au moins un élément d'arrêt (4, 4a) et une unité de commande configurée pour modifier la vitesse d'alimentation de la courroie de compensation (6), spécifiquement par rétroaction, en fonction de la valeur de poussée mesurée par l'au moins un capteur de poussée.
  3. Dispositif selon la revendication 2, dans lequel l'unité de commande est configurée pour maintenir constante la valeur de poussée de la pile (P) de flans (100) sur l'au moins un élément d'arrêt (4, 4a), spécifiquement à une valeur prédéterminée ou réglable.
  4. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel la section de fonctionnement (7) de la courroie de compensation (6) a une longueur (L) comprise entre 20 et 40 cm et/ou se termine à une distance (d) comprise entre 10 et 15 cm du flan d'extrémité (100).
  5. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel la courroie de compensation (6) comporte une pluralité de trous traversants (8) configurés pour transmettre l'aspiration pneumatique et disposés le long d'une direction d'alimentation (A) de la courroie de compensation (6).
  6. Dispositif selon la revendication 5, dans lequel les trous (8) sont disposés le long d'une ou plusieurs rangées parallèles à la direction d'alimentation de la courroie de compensation (6).
  7. Dispositif selon la revendication 5 ou 6, comprenant en outre, sous la section supérieure (7) de la courroie de compensation (6), un panneau de support d'aspiration (10) configuré de telle sorte que chaque trou (8) de la section supérieure (7) de la courroie de compensation (6) reste relié à la source d'aspiration pneumatique à mesure que la courroie de compensation (6) avance.
  8. Dispositif selon la revendication 7, dans lequel le panneau de support (10) est plat et est pourvu d'au moins un évidement allongé (11) relié à la source d'aspiration pneumatique, l'évidement allongé (11) étant aligné avec une trajectoire d'alimentation des trous (8) de la section supérieure (7) de la courroie de compensation (6) de telle sorte qu'il est relié simultanément à une pluralité des trous (8).
  9. Dispositif selon la revendication 8, dans lequel le panneau de support (10) est pourvu d'au moins deux évidements allongés (11) alignés le long de la direction d'alimentation (A) et séparés l'un de l'autre par une paroi (11b) dont la taille, le long de la direction d'alimentation de la courroie de compensation (6) est inférieure au diamètre des trous (8).
  10. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel les moyens d'alimentation (2) définissent un espace d'alimentation pour alimenter la pile (P) de flans (100) et comprennent une paroi inférieure fixe (12) délimitant au moins une partie d'un côté inférieur de l'espace d'alimentation, et dans lequel la section supérieure (7) de la courroie de compensation (6) se trouve dans un plan à un niveau plus élevé que la paroi inférieure (12).
  11. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel la courroie de compensation (6) est une courroie faite d'un matériau flexible, de préférence non poreux, spécifiquement du caoutchouc ou un matériau élastomère.
  12. Dispositif selon une ou plusieurs des revendications précédentes, comprenant deux ou plusieurs courroies de compensation (6) se déplaçant côte à côte, de préférence une paire de courroies de compensation (6) disposées symétriquement par rapport à un plan d'alimentation longitudinal de la pile (P) de flans (100).
  13. Dispositif selon une ou plusieurs des revendications précédentes, comprenant en outre une surface de support plate (16) pour supporter la pile (P) de flans (100), disposée en amont de la au moins une courroie de compensation (6), et un élément de nivellement (13) configuré et/ou disposé pour fonctionner sur un tronçon de la pile (P) de flans (100) disposé sur la surface de support plate (16) afin de pousser les flans (100) individuels contre la surface de support plate (16) de manière à les aligner les unes avec les autres, l'élément de nivellement (13) étant de préférence sélectionné entre une courroie, un rouleau ou un déflecteur fixe.
  14. Dispositif selon la revendication 1, dans lequel la courroie d'alignement (14) a au moins une portion mobile conçue pour entrer en contact avec les flans (100) de l'étirement d'extrémité de sortie (P2) et ayant une composante de vitesse le long d'une direction d'alimentation de la pile (P), et dans lequel la courroie d'alignement (14) est associée à un moteur respectif configuré pour déplacer la portion mobile de la courroie d'alignement (14) à une vitesse supérieure ou inférieure à la pile (P) de flans (100) et/ou supérieure ou inférieure à la vitesse d'alimentation de la courroie de compensation (6).
  15. Dispositif selon la revendication 14, dans lequel la au moins une courroie d'alignement (14) est disposée sous la pile (P) de flans (100) et a une section supérieure (15) respective qui est parallèle et de préférence coplanaire avec la section supérieure (7) de la au moins une courroie de compensation (6).
  16. Dispositif selon la revendication 14, dans lequel la au moins une courroie d'alignement (14) est disposée de manière à agir sur une portion latérale respective du tronçon d'extrémité de sortie (P2) de la pile (P) de flans (100).
  17. Procédé pour alimenter des flans dans une machine de transformation ultérieure, en particulier dans une machine d'emballage, et de préférence en utilisant un dispositif (1) selon une ou plusieurs des revendications précédentes, comprenant une étape d'alimentation d'une pile (P) de flans (100) disposées en succession dans une configuration superposée le long d'une direction d'alimentation (A) vers un élément d'arrêt (4, 4a) ; dans lequel la pile (P) de flans (100) est soumise à une action de poussée (F) en direction de l'au moins un élément d'arrêt (4, 4a), en particulier par gravité et/ou au moyen d'un élément de poussée appliqué à une deuxième extrémité de la pile (P) de flans (100), opposée à la première extrémité (P1) ;
    dans lequel l'étape d'alimenter la pile (P) de flans (100) le long de la direction d'alimentation (A) est effectuée à l'aide d'au moins une courroie de compensation (6) ayant une section supérieure (7) s'étendant parallèlement à la direction d'alimentation (A) de la pile (P) de flans (100) et définissant un support inférieur d'une portion prédéfinie de la pile (P) de flans (100) de sorte que la portion prédéfinie de la pile (P) de flans (100) repose, de préférence repose exclusivement, sur la section de fonctionnement (7) de l'au moins une courroie de compensation (6), et dans lequel la courroie de compensation (6) a une vitesse d'alimentation qui est ajustée de manière à modifier la poussée sur l'élément d'arrêt (4, 4a) ;
    caractérisé en ce que la courroie de compensation (6) est une courroie d'aspiration reliée à une source d'aspiration pneumatique et en ce que, entre l'au moins une courroie de compensation (6) et l'au moins un élément d'arrêt (4, 4a), est disposée au moins une courroie d'alignement (14) disposée et/ou configurée d'entrer en contact local avec un tronçon d'extrémité de sortie (P2) de la pile (P) de flans (100) et de manière à garantir que chaque flan (100) du tronçon d'extrémité de sortie (P2) est progressivement alignée avec un plan de positionnement, la au moins une courroie d'alignement (14) étant entraînée, par un dispositif d'entraînement respectif, afin d'avancer ou de retenir une portion périmétrique de chaque flan (100) du tronçon d'extrémité de sortie (P2), spécifiquement par une accélération ou une décélération localisée effectuée par la courroie d'alignement (14), de sorte que les courbures ou les renflements dans les flans (100) sont réduits ou éliminés.
  18. Procédé selon la revendication 17, dans lequel la vitesse d'alimentation de la courroie de compensation (6) est ajustée, spécifiquement par rétroaction, en fonction d'une valeur de poussée mesurée par au moins un capteur de poussée associé à l'au moins un élément d'arrêt (4, 4a), de préférence de manière à maintenir la valeur de poussée mesurée par le capteur de poussée de préférence constante, et plus préférablement à une valeur prédéterminée ou préréglable.
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US20120012440A1 (en) * 2010-07-19 2012-01-19 Marcus Gasser Negative-pressure conveyor

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US5299797A (en) * 1992-08-28 1994-04-05 Bell & Howell Phillipsburg Company Segmented document transport section having accelerated take-away belts
US5373933A (en) 1993-11-09 1994-12-20 Tomra Systems A/S Conveyor with variable suction force
AUPP093997A0 (en) 1997-12-12 1998-01-08 Tna Australia Pty Limited A conveyor
IT1304035B1 (it) * 1998-07-15 2001-03-02 Gd Spa Metodo e dispositivo per l'alimentazione di sbozzati in una macchinaimpacchettatrice.
JP4077245B2 (ja) 2002-05-28 2008-04-16 株式会社東芝 紙葉類取出装置
DE10350623B3 (de) * 2003-10-30 2005-04-14 Siemens Ag Vorrichtung zum Vereinzeln von flachen Sendungen in stehender Position aus einem Sendungsstapel
JP2012188274A (ja) * 2011-03-11 2012-10-04 Toshiba Corp 紙葉類取出装置
DE102011105887A1 (de) 2011-06-27 2012-12-27 Focke & Co. (Gmbh & Co. Kg) Vorrichtung und Verfahren zum Gruppieren von Gegenständen
EP2969267B1 (fr) * 2013-03-12 2018-08-15 United States Postal Service Système et procédé de gestion automatique des piles d'un dispositif de distribution

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