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EP0095955B1 - Method and device for transferring a sheet of material from one unit to another - Google Patents

Method and device for transferring a sheet of material from one unit to another Download PDF

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Publication number
EP0095955B1
EP0095955B1 EP83400941A EP83400941A EP0095955B1 EP 0095955 B1 EP0095955 B1 EP 0095955B1 EP 83400941 A EP83400941 A EP 83400941A EP 83400941 A EP83400941 A EP 83400941A EP 0095955 B1 EP0095955 B1 EP 0095955B1
Authority
EP
European Patent Office
Prior art keywords
speed
conveyor
downstream
upstream
sheet
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
Application number
EP83400941A
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German (de)
French (fr)
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EP0095955A1 (en
Inventor
Jean Pierre Cuir
Gérard Cuir
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Cuir SA
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Cuir SA
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Publication date
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Publication of EP0095955A1 publication Critical patent/EP0095955A1/en
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Expired 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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B65H5/025—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between belts and rotary means, e.g. rollers, drums, cylinders or balls, forming a transport nip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts

Definitions

  • the invention relates to a method and a device for transferring a sheet of material from an upstream assembly to a downstream receiver assembly, in particular when the supply of the sheet by the upstream assembly and its reception by the downstream receiver assembly takes place at different speeds.
  • the document FR-A-2 418 168 detects a product and a device for its implementation, of the type stated in the preamble of claims 1 and 2.
  • it is provided between the upstream assembly and the downstream receiver assembly, two successive conveyors, one of the two aforementioned conveyors moving at a substantially constant speed equal to the speed of one of the assemblies, while the other conveyor is intended to be accelerated to pass the sheets which it receives from the speed of the aforementioned assembly at the speed of the other assembly, speed which is greater than that of the first assembly, then to be decelerated from the speed of this other assembly to the speed of the first so as to receive a new sheet at to transfer.
  • the acceleration and then the deceleration are communicated to the conveyor which in the kinematic chain is upstream, which in addition is pivotally mounted for picking up the sheets one by one before disappearing, such a method and device has the drawback of be complex and expensive.
  • downstream conveyor is connected, on the one hand, to the upstream conveyor by a freewheel clutch which, like a bicycle wheel, ensures the drive of the downstream conveyor at a speed always at least equal to that of the upstream transporter without prohibiting its movement at a higher speed and, on the other hand, by means periodically driven by the same movement by another freewheel which, as soon as this means has reached a speed greater than that of upstream carrier, takes over from the downstream carrier's drive.
  • the subject of this invention is also a-A
  • CHARACTERIZED in that it is provided with at least one device as above defined as defined above.
  • the transfer method according to the invention has the advantage, during transfer of the sheet, of adjusting its speed so that it leaves the device with the speed V 2 required by the assembly. downstream receiver while guaranteeing the register with respect to the two assemblies 3, 6.
  • the device for implementing this method firstly comprises at least two successive conveyors 11, 12, including an upstream conveyor 11 and a downstream conveyor 12.
  • these conveyors consist of endless belts formed of belts 13, 14 the upper strand of which receives the sheet 2 and can itself rest on a table 15, 16.
  • the tables 15, 16 consist of the active wall of suction boxes 21, 22 making it possible to apply the sheet 2 against the belts so as to increase their respective adhesion forces.
  • the two conveyors are provided with means which, with equal contact surfaces, give the downstream conveyor 12 an adhesive force on the sheet greater than that given to the upstream conveyor 11
  • These means may consist of a greater depression in the box 22 of the downstream conveyor 12 than in the box 21 of the upstream conveyor 11 and / or in belts differing in such a way that those of the downstream conveyor 12 offer a greater coefficient of friction than those of the upstream conveyor 11, for example following differences in materials and / or surface states and at least one of which may be notched.
  • the drive pulleys 17, 18 are obviously connected by any known means to their drive means 23, 24.
  • the device further comprises a detector 25 of the support of a sufficient part of the sheet 2 on the downstream conveyor 12 so that the adhesion of this part on the latter is already greater than the adhesion than the rest of the sheet. still has on the upstream conveyor 11.
  • This detector controls a regulator 26 of the speed of the motor means 24 of the downstream conveyor 12.
  • the device comprises clutches 27, 28 by which, under the control of the regulator 26, the motor moven 24 is connected, sometimes to the motor means 23 controlling the upstream conveyor, sometimes to the motor means 29 of the downstream receiver assembly 6.
  • the downstream conveyor 12 is connected, on the one hand, to the upstream conveyor 11 by a freewheeling clutch which, like a bicycle wheel, ensures the drive of the downstream conveyor 12 at a speed always at least equal to that of the upstream conveyor without however prohibit its movement at a higher speed and, on the other hand, to the marble by another freewheel which, as soon as the marble has reached a speed higher than that of the upstream conveyor, takes over from the drive of the downstream conveyor .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Description

L'invention se rapporte à un procédé et à un dispositif de transfert d'une feuilie de matériau d'un ensemble amont à un ensemble récepteur aval et ce notamment lorsque la fourniture de la feuille par l'ensemble amont et sa réception par l'ensemble récepteur aval se font à des vitesses différentes.The invention relates to a method and a device for transferring a sheet of material from an upstream assembly to a downstream receiver assembly, in particular when the supply of the sheet by the upstream assembly and its reception by the downstream receiver assembly takes place at different speeds.

Elle trouve, plus particulièrement mais non exclusivement, application dans le transfert des feuilles de papier ou des flans de carton d'une machine d'impression ou de découpage à une autre alors que dans ces machines, les vitesses linéaires peuvent varier dans de grandes proportions et que par rapport aux deux machines, il faut en plus respecter le registre de la feuille.It finds, more particularly but not exclusively, application in the transfer of sheets of paper or blanks of cardboard from one printing or cutting machine to another whereas in these machines, the linear speeds can vary in great proportions and that compared to the two machines, it is also necessary to respect the register of the sheet.

Pour les machines ayant de telles différences de vitesses, il est connu d'utiliser soit un margeur supplémentaire, soit un balancier lançant la feuille vers l'ensemble récepteur aval, soit également des taquets pousseurs montes sur des chaînes.For machines with such speed differences, it is known to use either an additional feeder, or a balance throwing the sheet towards the downstream receiver assembly, or also pushing cleats mounted on chains.

Le document FR-A-2 418 168 déout un prodédé et un dispositif pour sa mise en oewre, du type énonce dans préombule des revendications 1 et 2. Dans ce document, on préwoit entre l'ensemble amont et l'ensemble récepteur aval, deux transporteurs successifs, l'un des deux transporteurs précités se déplaçant à une vitesse sensiblement constante égale à la vitesse de i'un des ensembles, tandis que l'autre transporteur est destiné à être accéléré pour faire passer les feuilles qu'il reçoit de la vitesse de l'ensemble precité à la vitesse de l'autre ensemble, vitesse qui est supérieure à celle du premier ensemble, puis à être décéléré de la vitesse de cet autre ensemble à la vitesse du premier de façon à recevoir une nouvelle feuille à transférer. L'accelération puis la décélération sont communiquées au transporteur qui dans la chaîne cinématique est en amont, qui en outre est monté basculant pour prélever les feuilles une à une avant de s'éclipser, un tel ces procédé et dispositif a l'nconvénient d'être complexe et onéreux.The document FR-A-2 418 168 detects a product and a device for its implementation, of the type stated in the preamble of claims 1 and 2. In this document, it is provided between the upstream assembly and the downstream receiver assembly, two successive conveyors, one of the two aforementioned conveyors moving at a substantially constant speed equal to the speed of one of the assemblies, while the other conveyor is intended to be accelerated to pass the sheets which it receives from the speed of the aforementioned assembly at the speed of the other assembly, speed which is greater than that of the first assembly, then to be decelerated from the speed of this other assembly to the speed of the first so as to receive a new sheet at to transfer. The acceleration and then the deceleration are communicated to the conveyor which in the kinematic chain is upstream, which in addition is pivotally mounted for picking up the sheets one by one before disappearing, such a method and device has the drawback of be complex and expensive.

Un résultat que l'invention vise à obtenir est un procédé et un dispositif de transfert qui soient simples garantissent le registre par rapport aux deux ensembles. A cet effet, elle a pour objet un procédé de transfert du type cité plus haut, caractérisé en ce que:

  • - on fait se déplacer à vitesse sensiblement constante le transporteur amont
  • - on communique aux feuilles à transférer une adhérence qui, à surface égale de contact, est plus élevée sur le transporteur aval que sur le transporteur amont,
  • - on accélere le transporteur aval de la vitesse du transporteur amont jusqu'à la vitesse de l'ensemble récepteur aval, lorsque chacune des feuilles à transferer arrive sur le transporteur aval et le recouvre par une partie suffisante de sa longueur pour que les forces d'adhérence de cette partie de la feuille sur le transporteur aval soient déjà supérieures à celles qu'a encore le reste de la feuille sur le transporteur amont.
A result which the invention aims to obtain is a method and a transfer device which are simple guarantee the register with respect to the two sets. To this end, it relates to a transfer process of the type mentioned above, characterized in that:
  • - the upstream conveyor is made to move at substantially constant speed
  • - the sheets to be transferred are communicated with an adhesion which, on an equal contact surface, is higher on the downstream conveyor than on the upstream conveyor,
  • - the downstream conveyor is accelerated from the speed of the upstream conveyor to the speed of the downstream receiver assembly, when each of the sheets to be transferred arrives on the downstream conveyor and covers it with a sufficient part of its length for the forces d adhesion of this part of the sheet on the downstream conveyor is already greater than that still has the rest of the sheet on the upstream conveyor.

Elle a également pour objet le dispositif de mise en ouvre de ce procédé
caractérisé en ce que le transporteur aval est relié, d'une part, au transporteur amont par un embrayage à roue libre qui, à la manière d'une roue de bicyclette, assure l'entraînement du transporteur aval à une vitesse toujours au moins égale à celle du transporteur amont sans pour autant interdire son déplacement à une vitesse supérieure et, d'autre part, au moyen animé périodiquement d'un même mouvement par une autre roue libre qui, dès que ce moyen a atteint une vitesse supérieure à celle du transporteur amont, prend le relais de l'entraînement du transporteur aval.It also relates to the device for implementing this process.
characterized in that the downstream conveyor is connected, on the one hand, to the upstream conveyor by a freewheel clutch which, like a bicycle wheel, ensures the drive of the downstream conveyor at a speed always at least equal to that of the upstream transporter without prohibiting its movement at a higher speed and, on the other hand, by means periodically driven by the same movement by another freewheel which, as soon as this means has reached a speed greater than that of upstream carrier, takes over from the downstream carrier's drive.

Laprésente unvcention a egalement pour objet un-AThe subject of this invention is also a-A

Ensemble et notamment une machine d'impression ou de découpage, CARACTERISE en ce qu'il est pourvu d'au moins un dispositif tel que ci-clessus défini tel que ci-dessus défuni.Together and in particular a printing or cutting machine, CHARACTERIZED in that it is provided with at least one device as above defined as defined above.

Elle sera bien comprise à l'aide de la description ci-après faite. à titre d'exemple non limitatif en regard du dessin ci-annexé. qui représente, schématiquement le dispositif vu de profil.It will be clearly understood with the aid of the description below. by way of nonlimiting example with regard to the attached drawing. which schematically represents the device seen in profile.

En se reportant au dessin, on voit que le dispositif 1 assure le transfert de feuilles 2 provenant d'un ensemble amont tei une machine 3, en sortie de laquelle un transporteur à bande ou à rouleaux 4, 5 lui a communiqué une certaine vitesse linéaire V1, et se rendant à un ensemble récepteur aval 6, dans l'entrée duquel un transporteur à bande 7 ou à rouleaux 9, 10 lui communiquera une autre vitesse linéaire V2 résultant par exemple d'une différence entre les diamêtres D1' D2 de ceux des rouleaux respectifs 4, 9 qui néanmoins devraient faire un tour complet pour traiter une même feuille. En vue d'assurer le transfert:

  • -on accouple au moins deux transporteurs successifs 11, 12, dont un transporteur amont 11 et un transporteur aval 12, lesquels sont choisis de manière telle que, à surfaces de contact égaies, la feuille ait un coefficient d'adhérence plus élevé sur le transporteur aval 12 que sur le transporteur amont 11, et,
  • - tout d'abord, on adapte la vitesse de ces transporteurs celle qu'a la feuille en arrivant sur le transporteur amont, puis,
  • - lorsque la feuille est dégagée de l'ensemble amont l'ayant fournie au transporteur amont et recouvre le transporteur aval par une partie suffisante de sa longueur pour que les forces d'adhérence de cette partie de la feuille sur le transporteur aval soient déjà supérieures à celles qu'a encore le reste de la feuille sur le transporteur amont, on modifie la vitesse du transporteur aval jusqu'à atteindre la vitesse V2 à laquelle le transporteur aval doit délivrer la feuille et,
  • - enfin, dès que la feuille a quitté le transporteur aval, on ramène la vitesse du transporteur aval à celle du transporteur amont pour lui permettre de recevoir une nouvelle feuille.
Referring to the drawing, it can be seen that the device 1 ensures the transfer of sheets 2 coming from an upstream assembly such as a machine 3, at the outlet of which a belt or roller conveyor 4, 5 has communicated to it a certain linear speed V 1 , and going to a downstream receiver assembly 6, in the entrance of which a conveyor belt 7 or roller 9, 10 will communicate to it another linear speed V 2 resulting for example from a difference between the diameters D 1 ' D 2 of those of the respective rollers 4, 9 which nevertheless should make a full turn to process the same sheet. In order to ensure the transfer:
  • - at least two successive carriers 11, 12 are coupled, including an upstream carrier 11 and a downstream carrier 12, which are chosen so that, with even contact surfaces, the sheet has a higher coefficient of adhesion on the carrier downstream 12 than on the upstream conveyor 11, and,
  • - first of all, we adapt the speed of these conveyors to that of the sheet when arriving on the upstream conveyor, then,
  • - when the sheet is released from the upstream assembly having supplied it to the upstream conveyor and covers the downstream conveyor by a sufficient part of its length so that the adhesion forces of this part of the sheet on the downstream conveyor are already greater to those which the rest of the sheet still has on the upstream conveyor, the speed of the downstream conveyor is modified until reaching the speed V 2 at which the downstream conveyor must deliver the sheet and,
  • - finally, as soon as the sheet has left the downstream transporter, the speed of the downstream transporter is reduced to that of the upstream transporter to enable it to receive a new sheet.

On comprend que, de ce fait, le procédé de transfert selon l'invention a l'avantage, en cours de transfert de la feuille, de régler sa vitesse pour qu'elle sorte du dispositif avec la vitesse V2 requise par l'ensemble récepteur aval tout en garantissant le registre par rapport aux deux ensembles 3, 6.It is understood that, therefore, the transfer method according to the invention has the advantage, during transfer of the sheet, of adjusting its speed so that it leaves the device with the speed V 2 required by the assembly. downstream receiver while guaranteeing the register with respect to the two assemblies 3, 6.

Le dispositif de mise en oeuvre de ce procédé comprend tout d'abord au moins deux transporteurs successifs 11, 12, dont un transporteur amont 11 et un transporteur aval 12.The device for implementing this method firstly comprises at least two successive conveyors 11, 12, including an upstream conveyor 11 and a downstream conveyor 12.

De préférence, ces transporteurs consistent en des tapis sans fin formés de courroies 13, 14 dont le brin supérieur reçoit la feuille 2 et peut lui- même prendre appui sur une table 15, 16.Preferably, these conveyors consist of endless belts formed of belts 13, 14 the upper strand of which receives the sheet 2 and can itself rest on a table 15, 16.

Ces courroies sont passées, de manière connue, sur des poulies motrices 17, 18 et de renvoi 19, 20 assurant leur guidage et leur entrainement.These belts are passed, in known manner, on drive pulleys 17, 18 and return 19, 20 ensuring their guidance and their drive.

De préférence, les tables 15, 16 consistent en la paroi active de caissons d'aspiration 21, 22 permettant d'appliquer la feuille 2 contre les courroies de manière à augmenter leurs forces d'adhérence respectives.Preferably, the tables 15, 16 consist of the active wall of suction boxes 21, 22 making it possible to apply the sheet 2 against the belts so as to increase their respective adhesion forces.

Les deux transporteurs sont pourvus de moyens qui, à surfaces de contact égales, donnent au transporteur aval 12 une force d'adhérence sur la feuille supérieure à celle donnée au transporteur amont 11The two conveyors are provided with means which, with equal contact surfaces, give the downstream conveyor 12 an adhesive force on the sheet greater than that given to the upstream conveyor 11

Ces moyens peuvent consister en une dépression plus importante dans le caisson 22 du transporteur aval 12 que dans le caisson 21 du transporteur amont 11 et/ou en des courroies différant de manière telle que celles du transporteur aval 12 offrent un plus grand coefficient de frottement que celles du transporteur amont 11, par exemple suite à des différences de matières et/ou d'états de leur surface et dont au moins l'une d'elle peut être crantée.These means may consist of a greater depression in the box 22 of the downstream conveyor 12 than in the box 21 of the upstream conveyor 11 and / or in belts differing in such a way that those of the downstream conveyor 12 offer a greater coefficient of friction than those of the upstream conveyor 11, for example following differences in materials and / or surface states and at least one of which may be notched.

Les poulies motrices 17, 18 sont évidemment reliées par tout moyen connu à leur moyen moteur 23, 24.The drive pulleys 17, 18 are obviously connected by any known means to their drive means 23, 24.

Le dispositif comprend en outre un détecteur 25 de l'appui d'une partie suffisante de la feuille 2 sur le transporteur aval 12 pour que l'adhérence de cette partie sur ce dernier soit déjà supérieure à l'adhérence que le reste de la teuille a encore sur le transporteur amont 11.The device further comprises a detector 25 of the support of a sufficient part of the sheet 2 on the downstream conveyor 12 so that the adhesion of this part on the latter is already greater than the adhesion than the rest of the sheet. still has on the upstream conveyor 11.

Ce détecteur pilote un régulateur 26 de la vitesse du moyen moteur 24 du transporteur aval 12.This detector controls a regulator 26 of the speed of the motor means 24 of the downstream conveyor 12.

Du fait de l'adhérence plus forte du transporteur aval, on est assuré que, pendant la modification de la vitesse, la feuille suivra la vitesse du transporteur aval et glissera alors sur le transporteur amont.Due to the stronger adhesion of the downstream conveyor, it is ensured that, during the modification of the speed, the sheet will follow the speed of the downstream conveyor and will then slide on the upstream conveyor.

La feuille suit donc une loi de mouvement bien précise et c'est bien sûr ce qui permet de respecter le registre entre les ensembles 3 et 6.The sheet therefore follows a very precise law of motion and this is of course what makes it possible to respect the register between sets 3 and 6.

Pour l'adaptation de la vitesse du transporteur aval tantôt à celle du transporteur amont 11, tantôt à celle à laquelle ce transporteur aval doit fournir la feuille, dans un mode de réalisation, le dispositif comprend des embrayages 27, 28 par lesquels, sous le contrôle du régulateur 26, le moven moteur 24 est relié, tantôt au moyen moteur 23 commandant le transporteur amont, tantot au moyen moteur 29 de l'ensemble récepteur aval 6.For the adaptation of the speed of the downstream conveyor sometimes to that of the upstream conveyor 11, sometimes to that at which this downstream conveyor must supply the sheet, in one embodiment, the device comprises clutches 27, 28 by which, under the control of the regulator 26, the motor moven 24 is connected, sometimes to the motor means 23 controlling the upstream conveyor, sometimes to the motor means 29 of the downstream receiver assembly 6.

Lorsque l'ensemble récepteur aval 6 comprend un moyen 31 animé périodiquement d'un même mouvement tel un marbre 31 portant une contreforme 32 et animé d'un mouvement alternatif sous un cylindre 9, dans un mode préféré de réalisation, le transporteur aval 12 est relié, d'une part, au transporteur amont 11 par un embrayage à roue libre qui, à la manière d'une roue de bicyclette, assure l'entraînement du transporteur aval 12 à une vitesse toujours au moins égale à celle du transporteur amont sans pour autant interdire son déplacement à une vitesse supérieure et, d'autre part, au marbre par une autre roue libre qui, dès que le marbre a atteint une vitesse supérieure à celle du transporteur amont, prend le relais de l'entraînement du transporteur aval.When the downstream receiver assembly 6 comprises a means 31 periodically driven by the same movement such as a plate 31 carrying a counterform 32 and driven by a reciprocating movement under a cylinder 9, in a preferred embodiment, the downstream conveyor 12 is connected, on the one hand, to the upstream conveyor 11 by a freewheeling clutch which, like a bicycle wheel, ensures the drive of the downstream conveyor 12 at a speed always at least equal to that of the upstream conveyor without however prohibit its movement at a higher speed and, on the other hand, to the marble by another freewheel which, as soon as the marble has reached a speed higher than that of the upstream conveyor, takes over from the drive of the downstream conveyor .

Claims (10)

1. A method of transferring a sheet of material (2) coming from an upstream unit (3), such as a printing or cutting machine, which has imparted an output speed V, to the said sheet of material (2), and travelling towards a downstream receiving unit (6), to which the sheet must be supplied at a linear speed V2, according to which method two successive conveyors (11, 12), one referred to as the upstream conveyor and the other as the downstream conveyor, are displaced between the upstream unit (3) and the downstream receiving unit (6), one at an approximately constant speed which is equal to the speed of one of the above units (3, 6), and the other (12) at a speed which is accelerated so as to transfer the sheets which it receives from the speed V, to the speed V2, and then decelerated from the speed V2 to the speed V1' so as to receive at least one new sheet to be transferred, the speed V2 being greater than the speed V1, the said method being characterised in that
- the upstream conveyor is displaced at the approximately constant speed;
-the sheets (2) to be transferred are provided with a degree of adhesion, which, whilst having an even contact surface, is greater on the downstream conveyor (12) than on the upstream conveyor (11);
- the downstream conveyor is accelerated from the speed V, of the upstream conveyor (11) to the speed V2 of the downstream receiving unit (6), when each sheet to be transferred arrives on the downstream conveyor (12) and covers the said conveyor with a portion of its length which is sufficient for the adhesion forces of the said portion of the sheet on the downstream conveyor (12) to be greater than those which the remainder of the sheet still has on the upstream conveyor.
2. A device for carrying out the method according to claim 1, the said device allowing for the transfer of sheets (2) coming from an upstream unit (3) such as a printing or cutting machine, which has imparted a linear output speed V, to the sheets to be transferred, and travelling towards a downstream receiving unit (6), to which each sheet must be supplied at a linear speed V2, the speed V2 being greater than the speed VI, the said device comprising between the upstream unit (3) and the downstream receiving unit (6), two successive conveyors (11, 12), one of the two said conveyors moving at an approximately constant speed which is equal to the speed of one of the above units (3, 6), whilst the other conveyor is accelerated so as to transfer each sheet which it receives from the speed V, to the speed V2, and then decelerated from the speed V2 to the speed V" so as to receive at least one new sheet to be transferred, characterised in that the two successive upstream and downstream (11, 12) conveyors are chosen such that, whilst having an even contact surface, each of the sheets (2) to be transferred has a degree of adhesion which is greater on the downstream conveyor (12) than on the upstream conveyor (11), and the downstream conveyor (12) comprises means (26) for adjusting its speed to that of the upstream conveyor (11) and then to that of the downstream receiving unit (6), to which the downstream conveyor (12) supplies each of the sheets (2).
3. A device according to claim 2, characterised in that at least one of the upstream and downstream conveyors (11, 12) is formed by a continuous belt (13, 14), of which the side receiving the sheet (2) rests on a table (15, 16) formed by the active surface of a suction box (21, 22).
4. A device according to claim 2 or 3, wherein the upstream and downstream conveyors (11, 12) are formed by continuous belts (11, 12), characterised in that the belt of the downstream conveyor (12) has a surface condition which provides it with a degree of adhesion to the sheet which is greater than that obtained from the surface condition of the belt of the upstream conveyor (11).
5. A device according to any one of claims 2 to 4, wherein the upstream and downstream conveyors (11, 12) are provided with suction boxes (21, 22), characterised in that the suction box (22) of the downstream conveyor (12) is of the type producing a greater reduced pressure than the box of the upstream conveyor (11).
6. A device according to any one of the claims 2 to 5, characterised in that it comprises a detector (25) for detecting the pressure on the downstream conveyor (12) of a portion of the length of the sheet (2) which is sufficient for the degree of adhesion of the said portion on the said conveyor to be greater than the the degree of adhesion which the rest of the sheet has on the upstream conveyor (11), the said detector controlling a regulator (26) for adjusting the speed of a drive means (24) of the downstream conveyor (12).
7. A device according to any one of the claims 2 to 6, characterised in that it comprises clutches (27, 28) by means of which, under the control of a regulator (26), the drive means (24) of the downstream conveyor (12) is connected to the drive means (23) controlling the upstream conveyor (11) and then to the drive means (29) of the downstream receiving unit (6).
8. A device according to any one of the claims 2 to 7, of which the downstream receiving unit (6) comprises a means (31) to which a uniform movement is imparted periodically, such as a surface plate, which bears a counterform (32) and to which a reciprocating movement is imparted beneath a cylinder (9), the said device being characterised in that the downstream conveyor (12) is connected on the one hand to the upstream conveyor (11) by means of a free-wheel clutch, which, in the manner of a bicycle wheel, ensures that the downstream conveyor (12) is driven at a speed which is at all times at least equal to that of the upstream conveyor (11), without inhibiting its shifting to a higher speed, and on the other hand to a means (31) to which a uniform movement is imparted periodically by means of a further free-wheel which, when the said means (31) has reached a speed greater than that of the upstream conveyor (11), takes over the drive of the downstream conveyor 12.
9. A device according to claim 3 or 4, characterised in that at least one of the belts is formed by synchronous belts.
10. A unit (3, 6), more particularly a printing or cutting machine, characterised in that it is provided with at least one device according to any one of claims 2 to 9.
EP83400941A 1982-05-27 1983-05-10 Method and device for transferring a sheet of material from one unit to another Expired EP0095955B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8209704A FR2527573A1 (en) 1982-05-27 1982-05-27 METHOD AND DEVICE FOR TRANSFERRING A SHEET OF MATERIAL FROM ONE ASSEMBLY TO ANOTHER
FR8209704 1982-05-27

Publications (2)

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EP0095955A1 EP0095955A1 (en) 1983-12-07
EP0095955B1 true EP0095955B1 (en) 1986-03-19

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Family Applications (1)

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EP83400941A Expired EP0095955B1 (en) 1982-05-27 1983-05-10 Method and device for transferring a sheet of material from one unit to another

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US (1) US4632381A (en)
EP (1) EP0095955B1 (en)
DE (1) DE3362587D1 (en)
FR (1) FR2527573A1 (en)

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Also Published As

Publication number Publication date
FR2527573B1 (en) 1985-04-19
EP0095955A1 (en) 1983-12-07
DE3362587D1 (en) 1986-04-24
FR2527573A1 (en) 1983-12-02
US4632381A (en) 1986-12-30

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