EP2663517B1 - Device for bending a thin sheet - Google Patents

Device for bending a thin sheet Download PDF

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Publication number
EP2663517B1
EP2663517B1 EP12704291.9A EP12704291A EP2663517B1 EP 2663517 B1 EP2663517 B1 EP 2663517B1 EP 12704291 A EP12704291 A EP 12704291A EP 2663517 B1 EP2663517 B1 EP 2663517B1
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EP
European Patent Office
Prior art keywords
folding
blade
sheet
template
blades
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EP12704291.9A
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German (de)
French (fr)
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EP2663517A1 (en
Inventor
Nicolas PERDRIAU
Patrick RUBINSTEIN
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/30—Folding in combination with creasing, smoothing or application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
    • B65H2301/4433—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material
    • B65H2301/44336—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material using suction forces

Definitions

  • the present invention relates to a device and a method intended to produce, from a thin sheet, in particular a sheet of paper, comprising a series of parallel equidistant grooves, a folding along each of said grooves so as to form from one side to the other of the sheet a series of parallel and identical dihedrons.
  • the present invention is particularly interesting in the field of display and in particular in the presentation of so-called composite photos.
  • Display devices which consist of a multiplicity of adjacent and parallel dihedrons, the two faces of which are respectively coated with successive and alternating bands belonging to two different images or drawings so that, from an observation angle given, an observer can only see one of these images and that, from another given angle of observation, he can only see the other image.
  • a condition for obtaining a good image is that the angle of the fold is absolutely clear and it has been proposed for this purpose to make grooves along the axis of the fold to make it easier.
  • the object of the present invention is to propose a device making it possible to fold in the form of a series of adjacent dihedrons the various printed and grooved bands so that the fold lines coincide precisely with the grooves previously made.
  • the difficulty is all the greater as the size of the images is large so that the length of the sheet is such that it includes, at the end of folding, a large number of dihedrons. It is understood that, under these conditions, a small coincidence error between a groove and a fold line at the start of folding results in a significant error at the end thereof due to the accumulation of errors.
  • the holding means may be such that at any time during the sheet folding operation, at least one grooving line is kept applied against a junction line located upstream of said determined junction line.
  • said upstream junction line will be adjacent to the determined junction line.
  • the applicator means will preferably consist of transversely movable blades vertically and able to penetrate into the inter-dihedral volume so that their apex can come to bear on the junction line.
  • These blades may have two active faces forming an angle slightly less than that formed by the faces of the dihedral between which they apply the sheet of paper.
  • the blades will be placed on a gantry capable of moving, under the action of displacement means, in the longitudinal direction of the folding template.
  • displacement means will consist of stepping motors controlled by a control logic making it possible to move the gantry according to equal displacement steps.
  • the displacement pitch will be equal to the distance separating two consecutive edges of the dihedrons forming the folding template.
  • the dihedrons forming the latter will be crossed by channels connected to suction means.
  • the surface of the folding template can be divided into several zones, each of these zones being connected to the suction means and a solenoid valve controlled by the control logic, can be interposed between each zone and the suction means.
  • An air-impermeable fabric may be placed on the folding template, downstream of the applicator means and of the holding means.
  • the device according to the invention may include means capable of winding said fabric as the applicator means and the holding means move.
  • At least one of the blades may be provided with actuating means capable of allowing it to move horizontally.
  • At least one of the blades may be provided with a projection.
  • the blade located downstream of the blade provided with an advance will have, opposite the latter, a housing capable of receiving said projection.
  • the latter will have three blades, namely an upstream blade, a downstream blade and a middle blade.
  • the upstream blade will have advances at least at its ends.
  • the downstream and middle blades may be provided with actuating means capable of allowing them to move horizontally.
  • vertically movable blades will be used to apply the grooving lines of the sheet against the joining lines of the folding template.
  • Preferably three blades are used, namely an upstream blade, a downstream blade and a middle blade.
  • a new fold will preferably be provided by the vertical displacement of the downstream blade, at least the middle blade being lowered during this displacement so as to apply a fold previously formed against the folding template during this displacement.
  • the upstream blade will be brought close to the middle blade, so that the projections of these come to take place in corresponding housings of the middle blade, at least one of the downstream or middle blades being lowered during this movement, so as to keep applied the new fold formed and the previous fold against the folding template.
  • downstream and middle blades will then be advanced by a value equal to the spacing of two consecutive vertices of the dihedrons forming the folding template and the middle blade will be lowered into the fold recently formed, the upstream blade and its projections remaining lowered during this displacement in the previous folds.
  • the folding device 1 comprises a frame consisting of a rectangular table 3 resting on the ground by four feet 5.
  • the table 3 has on its two opposite longitudinal edges slides 7 on which a gantry 8 is slidably mounted.
  • the latter consists, on each of the longitudinal sides of the table 3, of a pair of slides 9 which cooperate with the slides 7 and which receive vertical uprights 11 which support a transverse upright 13.
  • the gantry 8 comprises advance means, not shown in the drawing, which are in particular made up of stepping motors, the advance of which is controlled and controlled by a control logic 15 so that the gantry can move from one across the table 3.
  • the surface of the latter receives a rectangular folding template 17, made for example of synthetic material, and which is constituted, as shown in the figure 5 , dihedral 19 whose angles at the apex are close to 90 ° and which extend along the entire transverse dimension of the table 3, ie perpendicular to the direction of movement D of the gantry 8.
  • the base of the folding template 17 is hollowed out of a chamber 21 which is in communication with the outside via channels 23 which pass through each dihedron 19 to open onto one face of the latter. These channels are distributed periodically over the entire length of each of the dihedrons 19.
  • the chamber 21 is connected by connection means 25 and a pipe 27 to a suction pump 29.
  • the base of the folding template 17 is divided into several sectors which are each supplied by a collector 31 which is itself supplied by a line 32 connected to the vacuum pump 29 with interposition of controllable solenoid valves, respectively 32a, 32b, 32c , 32d, 32e, by the control logic 15.
  • a collector 31 which is itself supplied by a line 32 connected to the vacuum pump 29 with interposition of controllable solenoid valves, respectively 32a, 32b, 32c , 32d, 32e, by the control logic 15.
  • Such an arrangement makes it possible to control the sectors in which it is desired to create a vacuum and this as a function of the position of the gantry crane. This thus saves power on the vacuum pump which allows you to work with a lower power pump.
  • an airtight canvas 18 which is wound on a transverse roller 20 which is secured to the gantry 8 by an upright 22, so that when the latter moves in the direction D to during the folding operation, the fabric 18 is wound on the roller 20 so as to release the dihedrons from the template which will be used for folding.
  • Such an embodiment makes it possible to hide the dihedrons 19 of the template 17 which have not yet been used, so as to reduce the suction energy necessary for plating the part of the folded sheet against the template. It is thus possible, by virtue of such an arrangement, not to use, as shown in the figure 7 , a single manifold 31 and a suction pump of reduced power
  • a composite image will be called an image formed from several basic images, for example a pair of images, as described below, which is printed on a flexible support such as preferably a sheet of paper 33.
  • a composite image as shown in the figure 8 , we originally have two graphic representations, for example photographs, which we respectively share in a first series a, b, c, ... j and a second series a ', b', c ', ... j 'of parallel strips of the same width, of the order for example of 10 mm, which are assembled together so that the first strip a of the first series and the first strip a' of the second series are arranged adjacent to each other. And we proceed step by step alternately so as to successively find the bands a, a ', b, b', c, c '... j, j' so as to form a new composite photograph.
  • the sheet of paper 33 which is printed and grooved on each line of separation of two adjacent photos, it is placed on the folding template 17 and it is blocked so that the first groove coincides with the first edge 19a of the folding template 17.
  • the sheet is applied to the folding template so that successive grooves are found respectively applied against an edge 19a and against the bottom 19b between the dihedrons 19, designated below by the junction line.
  • the application of the sheet 33 on the folding template 17 is carried out by means of a set of three blades, namely an upstream blade 35a, a middle blade 35b, and a downstream blade 35c which extend over the entire transverse dimension of the table 3 and which carry out a vertical movement v, as explained below, under the action of respective pneumatic cylinders 37a, 37b, 37c, as shown in the figure 10 , whose movements are controlled by the control logic 15.
  • the middle blades 35b and downstream 35c can also perform a horizontal and longitudinal movement h relative to the gantry 8.
  • the respective cylinders 37b and 37c which support them are mounted on a horizontal jack 40 capable of carrying out such a movement under the control of the control logic 15 as shown in the partial figure 4.
  • the blades 35a, 35b, 35c have an angle at the top A which is slightly less than the angle of the dihedrons 19 and which is preferably of the order of 86 ° so that during their movement of vertical displacement v their active end can come to bear on the junction line 19b.
  • a support plate 38 of the jacks 37a, 37b, 37c which are intended to support the blades 35a, 35b, 35c and is shown in the figures 11 to 13 this same support plate on which are respectively mounted a blade 35a, two blades 35a and 35b and the three blades 35a, 35b, and 35c.
  • the first blade, or upstream blade 35a has at each of its ends and in its middle a projection 35'a whose base reproduces that of the blade itself.
  • the second blade, or middle blade 35b as shown in the figures 12 and 14b , is provided at its ends and in its center with a recess 39 which is intended to receive the projections 35'a of the blade 35a, which allows the latter to come into abutment against the blade 35b as shown in the figure 12 .
  • the third blade, or downstream blade 35c, which is represented on the figures 13 and 14c is of the classic type.
  • the downstream blade 35c is lowered onto the sheet 33, which then forms a new fold.
  • the three folds disposed upstream thereof are securely held by the middle blade 35b located upstream of the working blade 35c, and by the upstream blade 35a and its projection 35'b, which prevents any sliding of the sheet 33 during this operation.
  • the angle at the apex A of the downstream blade 35c is less than the angle at the apex of the dihedrons, the apex of this blade can come into contact with the junction line 19b and thus bring the grooving line of the sheet 33 against this junction line.
  • Such a device thus makes it possible to carry out, with each formation of a fold, a refocusing of the position of a grooving line of the sheet with respect to a junction line of the folding template.
  • the upstream blade 35a ( figure 18a ) then the gantry 8 is advanced by a value h corresponding to the spacing e existing between two consecutive vertices of the dihedrons 19 of the folding template 17, and this while retracting the jack 40 so that the middle blades 35b and downstream 35c remain stationary relative to the sheet 33 so that they continue to hold the last two folds of the sheet of paper 33 applied to the folding template 17. We then find our in the starting position.
  • the folded part of the sheet is kept pressed against the folding template by at least one blade. This arrangement also helps to prevent the sheet from sliding relative to the template during the whole process.

Description

La présente invention concerne un dispositif et un procédé destinés à réaliser, à partir d'une feuille mince, notamment une feuille de papier, comportant une série de rainures parallèles équidistantes, un pliage suivant chacune desdites rainures de façon à former d'un côté à l'autre de la feuille une série de dièdres parallèles et identiques.The present invention relates to a device and a method intended to produce, from a thin sheet, in particular a sheet of paper, comprising a series of parallel equidistant grooves, a folding along each of said grooves so as to form from one side to the other of the sheet a series of parallel and identical dihedrons.

La présente invention se révèle particulièrement intéressante dans le domaine de l'affichage et notamment dans celui de la présentation de photos dites composites. On connaît en effet des dispositifs d'affichage qui sont constitués d'une multiplicité de dièdres adjacents et parallèles dont les deux faces sont respectivement revêtues de bandes successives et alternées appartenant à deux images ou dessins différents de sorte que, sous un angle d'observation donné, un observateur ne peut voir que l'une de ces images et que, sous un autre angle d'observation donné, il ne peut voir que l'autre image.The present invention is particularly interesting in the field of display and in particular in the presentation of so-called composite photos. Display devices are known which consist of a multiplicity of adjacent and parallel dihedrons, the two faces of which are respectively coated with successive and alternating bands belonging to two different images or drawings so that, from an observation angle given, an observer can only see one of these images and that, from another given angle of observation, he can only see the other image.

On sait que l'une des difficultés de réalisation d'un tel dispositif de présentation d'images est la mise en place des différentes bandes sur les faces respectives de ces dièdres, que ces images soient imprimées directement sur les faces de ces derniers ou collées sur ceux-ci, dans la mesure où le positionnement précis des différentes bandes joue un rôle primordial dans la qualité du résultat obtenu.We know that one of the difficulties in producing such an image presentation device is the positioning of the different bands on the respective faces of these dihedrons, whether these images are printed directly on the faces of the latter or glued on these, insofar as the precise positioning of the different bands plays a key role in the quality of the result obtained.

On a proposé dans le brevet US 5 598 650 de réaliser sur une même feuille les différentes bandes constituant la photographie composite que l'on souhaite afficher. Une fois celle-ci réalisée il est nécessaire de plier cette photo composite suivant chacune des lignes de séparation.We proposed in the patent US 5,598,650 to make on the same sheet the different bands constituting the composite photograph that one wishes to display. Once this is done it is necessary to fold this composite photo along each of the dividing lines.

Une condition pour obtenir une bonne image, est que l'angle de la pliure soit absolument net et l'on a proposé dans ce but de réaliser des rainures suivant l'axe de la pliure afin de rendre cette dernière plus facile.A condition for obtaining a good image is that the angle of the fold is absolutely clear and it has been proposed for this purpose to make grooves along the axis of the fold to make it easier.

On comprend dès lors qu'il est impératif de réaliser la série de rainures de façon précise ce qui impose qu'elles soient à la fois parallèles et de la même largeur que celle de l'impression, et ceci pour des photographies composites de grandes dimensions, autrement dit avec un nombre de rainures important.We therefore understand that it is imperative to carry out the series of grooves in a precise manner which means that they are both parallel and of the same width as that of the printing, and this for composite photographs of large dimensions. , in other words with a large number of grooves.

On sait, avec le matériel d'impression existant, réaliser de façon extrêmement précise des bandes de photographies alternées. On sait également réaliser le rainurage de ces différentes bandes de façon suffisamment précise pour obtenir une coïncidence absolue entre la ligne de séparation de deux images successives et la rainure de pliage.It is known, with existing printing equipment, to produce extremely precise bands of alternating photographs. It is also known to perform the grooving of these different bands sufficiently precisely to obtain an absolute coincidence between the line of separation of two successive images and the folding groove.

On connait de la publication EP378264 un dispositif permettant de réaliser le pliage d'une feuille selon des lignes de pliage parallèles au moyen de poinçons actionnables entre une position haute et une position basse en appui sur la feuille et une série de nervures d'un bloc de formage.We know of the publication EP378264 a device making it possible to fold a sheet along parallel fold lines by means of punches which can be actuated between a high position and a low position bearing on the sheet and a series of ribs of a forming block.

La présente invention a pour but de proposer un dispositif permettant de plier sous forme d'une série de dièdres adjacents les différentes bandes imprimées et rainurées de façon que les lignes de pliure coïncident de façon précise avec les rainures précédemment effectuées.The object of the present invention is to propose a device making it possible to fold in the form of a series of adjacent dihedrons the various printed and grooved bands so that the fold lines coincide precisely with the grooves previously made.

La difficulté est d'autant plus grande que la dimension des images est importante si bien que la longueur de la feuille est telle qu'elle comprend, en fin de pliure, un nombre important de dièdres. On comprend que, dans ces conditions, une faible erreur de coïncidence entre une rainure et une ligne de pliure en début de pliage se traduit en fin de celui-ci par une erreur importante en raison du cumul des erreurs.The difficulty is all the greater as the size of the images is large so that the length of the sheet is such that it includes, at the end of folding, a large number of dihedrons. It is understood that, under these conditions, a small coincidence error between a groove and a fold line at the start of folding results in a significant error at the end thereof due to the accumulation of errors.

La présente invention a ainsi pour objet un dispositif de pliage d'une feuille mince, notamment une feuille de papier, suivant des lignes de rainurage parallèles et équidistantes réalisées sur celle-ci, caractérisé en ce qu'il comporte :

  • un bâti apte à recevoir un gabarit de pliage de dimensions au moins égales à celles de la feuille à plier et qui est formé d'une succession de dièdres parallèles adjacents transversaux et identiques séparés par une ligne de jonction,
  • des moyens applicateurs mobiles en translation aptes à appliquer de façon successive une ligne de rainurage de la feuille contre une ligne de jonction du gabarit de pliage,
  • des moyens de maintien aptes, pendant l'actionnement des moyens applicateurs sur une ligne de jonction déterminée, à maintenir appliquée au moins une ligne de rainurage contre une ligne de jonction située en amont de la dite ligne de jonction déterminée.
The subject of the present invention is therefore a device for folding a thin sheet, in particular a sheet of paper, along parallel and equidistant grooving lines produced thereon, characterized in that it comprises:
  • a frame capable of receiving a folding template with dimensions at least equal to those of the sheet to be folded and which is formed of a succession of adjacent parallel transverse and identical dihedrons separated by a junction line,
  • applicator means mobile in translation capable of successively applying a grooving line of the sheet against a junction line of the folding template,
  • holding means capable, during actuation of the applicator means on a determined junction line, to keep applied at least one grooving line against a junction line located upstream of said determined junction line.

Par ailleurs les moyens de maintien pourront être tels, qu'à tout moment pendant l'opération de pliage de la feuille, au moins une ligne de rainurage soit maintenue appliquée contre une ligne de jonction située en amont de la dite ligne de jonction déterminée.Furthermore, the holding means may be such that at any time during the sheet folding operation, at least one grooving line is kept applied against a junction line located upstream of said determined junction line.

Préférentiellement ladite ligne de jonction amont sera adjacente à la ligne de jonction déterminée.Preferably said upstream junction line will be adjacent to the determined junction line.

Suivant l'invention les moyens applicateurs seront préférentiellement constitués de lames transversales mobiles verticalement et aptes à pénétrer dans le volume inter-dièdres de façon que leur sommet puisse venir en appui sur la ligne de jonction. Ces lames pourront comporter deux faces actives formant un angle légèrement inférieur à celui formé par les faces du dièdre entre lesquelles elles viennent appliquer la feuille de papier.According to the invention, the applicator means will preferably consist of transversely movable blades vertically and able to penetrate into the inter-dihedral volume so that their apex can come to bear on the junction line. These blades may have two active faces forming an angle slightly less than that formed by the faces of the dihedral between which they apply the sheet of paper.

Dans un mode de mise en oeuvre de l'invention les lames seront disposées sur un portique apte à se déplacer, sous l'action de moyens de déplacement, dans le sens longitudinal du gabarit de pliage. Ces moyens de déplacement seront constitués de moteurs pas à pas contrôlés par une logique de commande permettant de déplacer le portique suivant des pas de déplacement égaux.In one embodiment of the invention, the blades will be placed on a gantry capable of moving, under the action of displacement means, in the longitudinal direction of the folding template. These displacement means will consist of stepping motors controlled by a control logic making it possible to move the gantry according to equal displacement steps.

Préférentiellement le pas de déplacement sera égal à la distance séparant deux arêtes consécutives des dièdres formant le gabarit de pliage.Preferably, the displacement pitch will be equal to the distance separating two consecutive edges of the dihedrons forming the folding template.

De façon à assurer le maintien des parties pliées de la feuille sur le gabarit de pliage, les dièdres formant celui-ci seront traversés de canaux connectés à des moyens d'aspiration. Par ailleurs la surface du gabarit de pliage pourra être divisée en plusieurs zones, chacune de ces zones étant reliée aux moyens d'aspiration et une électrovanne pilotée par la logique de commande, pourra être interposée entre chaque zone et les moyens d'aspiration.In order to ensure the maintenance of the folded parts of the sheet on the folding template, the dihedrons forming the latter will be crossed by channels connected to suction means. Furthermore, the surface of the folding template can be divided into several zones, each of these zones being connected to the suction means and a solenoid valve controlled by the control logic, can be interposed between each zone and the suction means.

Une toile imperméable à l'air pourra être disposée sur le gabarit de pliage, en aval des moyens applicateurs et des moyens de maintien. Le dispositif suivant l'invention pourra comporter des moyens aptes à enrouler ladite toile au fur et à mesure du déplacement des moyens applicateurs et des moyens de maintien.An air-impermeable fabric may be placed on the folding template, downstream of the applicator means and of the holding means. The device according to the invention may include means capable of winding said fabric as the applicator means and the holding means move.

Suivant l'invention au moins l'une des lames pourra être pourvue de moyens d'actionnement aptes à lui permettre un mouvement de déplacement horizontal.According to the invention at least one of the blades may be provided with actuating means capable of allowing it to move horizontally.

Par ailleurs au moins l'une des lames pourra être pourvue d'une avancée. Préférentiellement la lame située en aval de la lame pourvue d'une avancée possédera, en face de celle-ci, un logement apte à recevoir ladite avancée.Furthermore, at least one of the blades may be provided with a projection. Preferably, the blade located downstream of the blade provided with an advance will have, opposite the latter, a housing capable of receiving said projection.

Dans un mode de réalisation préféré du dispositif de pliage suivant l'invention ce dernier possédera trois lames, à savoir une lame amont, une lame aval et une lame médiane. La lame amont possédera des avancées au moins à ses extrémités. Les lames aval et médiane pourront être pourvues de moyens d'actionnement aptes à leur permettre un mouvement de déplacement horizontal.In a preferred embodiment of the folding device according to the invention, the latter will have three blades, namely an upstream blade, a downstream blade and a middle blade. The upstream blade will have advances at least at its ends. The downstream and middle blades may be provided with actuating means capable of allowing them to move horizontally.

Dans ce mode de réalisation de l'invention la réalisation d'un nouveau pli sera assurée par le déplacement vertical de la lame aval.In this embodiment of the invention, the production of a new fold will be ensured by the vertical displacement of the downstream blade.

La présente invention a également pour objet un procédé de pliage sur un gabarit d'une feuille mince, notamment une feuille de papier, suivant des lignes de rainurage parallèles et équidistantes réalisées sur celle-ci et qui s'étendent transversalement d'un côté à l'autre de la feuille, ce gabarit de pliage étant formé d'une succession de dièdres transversaux parallèles adjacents et identiques séparés par une ligne de jonction, caractérisé en ce qu'il comporte les étapes consistant à:

  • appliquer de façon successive une ligne de rainurage de la feuille contre une ligne de jonction déterminée (19b) du gabarit de pliage,
  • maintenir, pendant ladite application, au moins une ligne de marquage contre une ligne de jonction située en amont de la dite ligne de jonction déterminée.
The present invention also relates to a method of folding a template of a thin sheet, in particular a sheet of paper, along parallel and equidistant grooving lines produced thereon and which extend transversely from side to side. the other side of the sheet, this folding jig being formed of a succession of adjacent and identical parallel transverse dihedrons separated by a junction line, characterized in that it comprises the steps consisting in:
  • successively applying a grooving line of the sheet against a determined joining line (19b) of the folding template,
  • maintain, during said application, at least one marking line against a junction line located upstream of said determined junction line.

Suivant ce procédé on fera appel à des lames mobiles verticalement pour appliquer les lignes de rainurage de la feuille contre les lignes de jonction du gabarit de pliage.According to this process, vertically movable blades will be used to apply the grooving lines of the sheet against the joining lines of the folding template.

On utilisera préférentiellement trois lames, à savoir une lame amont, une lame aval et une lame médiane.Preferably three blades are used, namely an upstream blade, a downstream blade and a middle blade.

Un nouveau pli sera préférentiellement assuré par le déplacement vertical de la lame aval, au moins la lame médiane étant abaissée pendant ce déplacement de façon à appliquer un pli précédemment formé contre le gabarit de pliage pendant ce déplacement. Une fois le pli réalisé, la lame amont sera ramenée près de la lame médiane, de façon que des avancées de celles-ci viennent prendre place dans des logements correspondants de la lame médiane, au moins une des lames aval ou médiane étant abaissée pendant ce mouvement, de façon à maintenir appliqué le nouveau pli formé et le pli précédent contre le gabarit de pliage.A new fold will preferably be provided by the vertical displacement of the downstream blade, at least the middle blade being lowered during this displacement so as to apply a fold previously formed against the folding template during this displacement. Once the fold has been made, the upstream blade will be brought close to the middle blade, so that the projections of these come to take place in corresponding housings of the middle blade, at least one of the downstream or middle blades being lowered during this movement, so as to keep applied the new fold formed and the previous fold against the folding template.

Les lames aval et médiane seront ensuite avancées d'une valeur égale à l'écartement de deux sommets consécutifs des dièdres formant le gabarit de pliage et la lame médiane sera abaissée dans le pli dernièrement formé, la lame amont et ses avancées restant abaissée pendant ce déplacement dans les plis précédents.The downstream and middle blades will then be advanced by a value equal to the spacing of two consecutive vertices of the dihedrons forming the folding template and the middle blade will be lowered into the fold recently formed, the upstream blade and its projections remaining lowered during this displacement in the previous folds.

On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel :

  • la figure 1 est une vue schématique suivant la largeur d'un dispositif de pliage suivant l'invention,
  • la figure 2 est une vue schématique suivant la longueur du dispositif de pliage représenté sur la figure 1,
  • la figure 3 est une vue de détails en coupe partielle des moyens de coulissement du portique mis en oeuvre dans le dispositif de pliage suivant l'invention,
  • la figure 4 est une vue partielle des lames de pliage du dispositif représenté sur la figure 2,
  • la figure 5 est une vue schématique de détails en coupe des lames assurant le pliage et qui sont destinées à coopérer avec un gabarit de pliage,
  • la figure 6 est une vue de détails en coupe des moyens d'aspiration destinés à assurer le maintien sur le gabarit de pliage de la partie de feuille déjà pliée,
  • la figure 7 est une vue de côté suivant la longueur de la table, montrant des moyens de masquage des dièdres non utilisés du gabarit de pliage,
  • la figure 8 est une vue partielle en plan d'une feuille de papier imprimée et rainurée, que l'on souhaite plier,
  • la figure 9 est une vue schématique agrandie en coupe d'un gabarit de pliage recevant une feuille et des lames de pliage,
  • la figure 10 est une vue de détails en perspective des vérins d'actionnement des lames de pliage,
  • les figures 11 à 13 sont des vues de détails en perspective des vérins de la figure 10 qui sont respectivement équipés d'une lame, de deux lames et de trois lames de pliage,
  • les figures 14a à 14c sont des vues en coupe transversales des extrémités des lames de pliage,
  • les figures 15 à 18c sont des vues schématiques illustrant les mouvements respectifs des lames au cours d'un cycle de pliage.
An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
  • the figure 1 is a schematic view along the width of a folding device according to the invention,
  • the figure 2 is a schematic view along the length of the folding device shown in the figure 1 ,
  • the figure 3 is a detail view in partial section of the gantry sliding means used in the folding device according to the invention,
  • the figure 4 is a partial view of the folding blades of the device shown in the figure 2 ,
  • the figure 5 is a schematic view of details in section of the blades ensuring the folding and which are intended to cooperate with a folding jig,
  • the figure 6 is a detail view in section of the suction means intended to maintain the already folded sheet part on the folding template,
  • the figure 7 is a side view along the length of the table, showing means for masking the unused dihedrons of the folding template,
  • the figure 8 is a partial plan view of a printed and grooved sheet of paper, which it is desired to fold,
  • the figure 9 is an enlarged schematic view in section of a folding template receiving a sheet and folding blades,
  • the figure 10 is a detail view in perspective of the actuating cylinders of the folding blades,
  • the figures 11 to 13 are perspective views of the cylinders of the figure 10 which are respectively equipped with a blade, two blades and three folding blades,
  • the figures 14a to 14c are cross-sectional views of the ends of the folding blades,
  • the figures 15 to 18c are schematic views illustrating the respective movements of the blades during a folding cycle.

Ainsi que représenté sur les figures schématiques 1 à 3 le dispositif de pliage 1 suivant l'invention comprend un châssis constitué d'une table rectangulaire 3 reposant sur le sol par quatre pieds 5. La table 3 comporte sur ses deux bords longitudinaux opposés des coulisses 7 sur lesquelles est monté à coulissement un portique 8. Ce dernier est constitué, sur chacun des côtés longitudinaux de la table 3 d'une paire de coulisseaux 9 qui coopèrent avec les coulisses 7 et qui reçoivent des montants verticaux 11 qui supportent un montant transversal 13.As shown in schematic figures 1 to 3, the folding device 1 according to the invention comprises a frame consisting of a rectangular table 3 resting on the ground by four feet 5. The table 3 has on its two opposite longitudinal edges slides 7 on which a gantry 8 is slidably mounted. The latter consists, on each of the longitudinal sides of the table 3, of a pair of slides 9 which cooperate with the slides 7 and which receive vertical uprights 11 which support a transverse upright 13.

Le portique 8 comporte des moyens d'avance, non représentés sur le dessin, qui sont notamment constitués de moteurs pas à pas dont l'avance est contrôlée et commandée par une logique de commande 15 de façon que le portique puisse se déplacer d'une extrémité à l'autre de la table 3.The gantry 8 comprises advance means, not shown in the drawing, which are in particular made up of stepping motors, the advance of which is controlled and controlled by a control logic 15 so that the gantry can move from one across the table 3.

La surface de cette dernière reçoit un gabarit de pliage rectangulaire 17, réalisé par exemple en matière de synthèse, et qui est constitué, ainsi que représenté sur la figure 5, de dièdres 19 dont les angles au sommet sont voisin de 90° et qui s'étendent suivant la totalité de la dimension transversale de la table 3, soit perpendiculairement à la direction de déplacement D du portique 8.The surface of the latter receives a rectangular folding template 17, made for example of synthetic material, and which is constituted, as shown in the figure 5 , dihedral 19 whose angles at the apex are close to 90 ° and which extend along the entire transverse dimension of the table 3, ie perpendicular to the direction of movement D of the gantry 8.

Ainsi que représenté sur la figure 6, la base du gabarit de pliage 17 est creusée d'une chambre 21 qui est en communication avec l'extérieur par des canaux 23 qui traversent chaque dièdre 19 pour déboucher sur une face de ces derniers. Ces canaux se répartissent périodiquement sur toute la longueur de chacun des dièdres 19. La chambre 21 est reliée par des moyens de connexion 25 et une conduite 27 à une pompe aspirante 29.As shown in the figure 6 , the base of the folding template 17 is hollowed out of a chamber 21 which is in communication with the outside via channels 23 which pass through each dihedron 19 to open onto one face of the latter. These channels are distributed periodically over the entire length of each of the dihedrons 19. The chamber 21 is connected by connection means 25 and a pipe 27 to a suction pump 29.

Préférentiellement, ainsi que représenté sur les figures 1 et 2, la base du gabarit de pliage 17 est divisée en plusieurs secteurs qui sont chacun alimentés par un collecteur 31 qui est lui même alimenté par une conduite 32 reliée à la pompe à vide 29 avec interposition d'électrovannes commmandables, respectivement 32a, 32b, 32c, 32d, 32e, par la logique de commande 15. Une telle disposition permet de contrôler les secteurs dans lesquels on souhaite faire le vide et ceci en fonction de la position du portique 8. On réalise ainsi une économie de puissance de la pompe à vide qui permet de travailler avec une pompe de moindre puissance.Preferably, as shown in the figures 1 and 2 , the base of the folding template 17 is divided into several sectors which are each supplied by a collector 31 which is itself supplied by a line 32 connected to the vacuum pump 29 with interposition of controllable solenoid valves, respectively 32a, 32b, 32c , 32d, 32e, by the control logic 15. Such an arrangement makes it possible to control the sectors in which it is desired to create a vacuum and this as a function of the position of the gantry crane. This thus saves power on the vacuum pump which allows you to work with a lower power pump.

Dans une autre variante de l'invention qui est représentée sur la figure 7, on dispose sur le gabarit de pliage 17 une toile imperméable à l'air 18 qui est enroulée sur un rouleau transversal 20 qui est solidarisé du portique 8 par un montant 22, de façon que, lorsque ce dernier se déplace dans la direction D au cours de l'opération de pliage, la toile 18 s'enroule sur le rouleau 20 de façon à dégager les dièdres du gabarit qui vont être utilisés pour le pliage.In another variant of the invention which is shown in the figure 7 , there is on the folding template 17 an airtight canvas 18 which is wound on a transverse roller 20 which is secured to the gantry 8 by an upright 22, so that when the latter moves in the direction D to during the folding operation, the fabric 18 is wound on the roller 20 so as to release the dihedrons from the template which will be used for folding.

Un tel mode de mise en oeuvre permet de masquer les dièdres 19 du gabarit 17 qui n'ont pas encore été utilisés, de façon à diminuer l'énergie d'aspiration nécessaire au placage de la partie de la feuille pliée contre le gabarit. On peut ainsi, grâce à une telle disposition, n'utiliser, ainsi que représenté sur la figure 7, qu'un seul collecteur 31 et une pompe d'aspiration de puissance réduiteSuch an embodiment makes it possible to hide the dihedrons 19 of the template 17 which have not yet been used, so as to reduce the suction energy necessary for plating the part of the folded sheet against the template. It is thus possible, by virtue of such an arrangement, not to use, as shown in the figure 7 , a single manifold 31 and a suction pump of reduced power

Suivant l'invention on dispose d'une feuille de papier qui est revêtue d'une image composite. On appellera image composite une image constituée à partir de plusieurs images de base, par exemple un couple d'images, ainsi que décrit ci-après, qui est imprimée sur un support souple tel que préférentiellement une feuille de papier 33. Pour constituer une telle image composite, ainsi que représenté sur la figure 8, on dispose à l'origine de deux représentations graphiques, par exemple des photographies, que l'on partage respectivement en une première série a, b, c, ... j et une seconde série a', b' , c', ... j' de bandes parallèles de même largeur, de l'ordre par exemple de 10 mm, que l'on assemble entre-elles de façon que la première bande a de la première série et la première bande a' de la seconde série soient disposées de façon adjacente. Et l'on procède ainsi de proche en proche de façon alternée de façon à trouver successivement les bandes a,a',b,b',c,c' ... j,j' de façon à former une nouvelle photographie composite.According to the invention there is a sheet of paper which is coated with a composite image. A composite image will be called an image formed from several basic images, for example a pair of images, as described below, which is printed on a flexible support such as preferably a sheet of paper 33. To constitute such a composite image as shown in the figure 8 , we originally have two graphic representations, for example photographs, which we respectively share in a first series a, b, c, ... j and a second series a ', b', c ', ... j 'of parallel strips of the same width, of the order for example of 10 mm, which are assembled together so that the first strip a of the first series and the first strip a' of the second series are arranged adjacent to each other. And we proceed step by step alternately so as to successively find the bands a, a ', b, b', c, c '... j, j' so as to form a new composite photograph.

Pour assurer le pliage de la feuille de papier 33 qui est imprimée et rainurée sur chaque ligne de séparation de deux photos adjacentes, on dispose celle-ci sur le gabarit de pliage 17 et on la bloque de façon que la première rainure coïncide avec la première arête 19a du gabarit de pliage 17. Suivant l'invention et ainsi que représenté sur la figure 6, on applique la feuille sur le gabarit de pliage de façon que des rainures successives se trouvent respectivement appliquées contre une arête 19a et contre le fond 19b entre les dièdres 19, désigné ci-après par ligne de jonction. Une fois cette application effectuée la feuille de papier 33 reste maintenue contre les dièdres 19 du gabarit de pliage 17 sous l'effet de l'aspiration effectuée par la pompe à vide 29 via les canaux d'aspiration 23 prévus dans ces derniers.To ensure the folding of the sheet of paper 33 which is printed and grooved on each line of separation of two adjacent photos, it is placed on the folding template 17 and it is blocked so that the first groove coincides with the first edge 19a of the folding template 17. According to the invention and as shown in the figure 6 , the sheet is applied to the folding template so that successive grooves are found respectively applied against an edge 19a and against the bottom 19b between the dihedrons 19, designated below by the junction line. Once this application has been made, the sheet of paper 33 remains held against the dihedrons 19 of the folding template 17 under the effect of the suction carried out by the vacuum pump 29 via the suction channels 23 provided in the latter.

Ainsi que représenté schématiquement sur la figure 9, l'application de la feuille 33 sur le gabarit de pliage 17 est effectuée au moyen d'un ensemble de trois lames, à savoir une lame amont 35a, une lame médiane 35b, et une lame aval 35c qui s'étendent sur toute la dimension transversale de la table 3 et qui effectuent un mouvement vertical v, ainsi qu'expliqué ci-après, sous l'action de vérins pneumatiques respectifs 37a, 37b, 37c, ainsi que représenté sur la figure 10, dont les mouvements sont pilotés par la logique de commande 15. Les lames médiane 35b et aval 35c peuvent également effectuer un déplacement horizontal et longitudinal h par rapport au portique 8. A cet effet les vérins respectifs 37b et 37c qui les supportent sont montés sur un vérin horizontal 40 apte à effectuer un tel déplacement sous le contrôle de la logique de commande 15 ainsi que représenté sur la figure partielle 4.As shown schematically on the figure 9 , the application of the sheet 33 on the folding template 17 is carried out by means of a set of three blades, namely an upstream blade 35a, a middle blade 35b, and a downstream blade 35c which extend over the entire transverse dimension of the table 3 and which carry out a vertical movement v, as explained below, under the action of respective pneumatic cylinders 37a, 37b, 37c, as shown in the figure 10 , whose movements are controlled by the control logic 15. The middle blades 35b and downstream 35c can also perform a horizontal and longitudinal movement h relative to the gantry 8. For this purpose the respective cylinders 37b and 37c which support them are mounted on a horizontal jack 40 capable of carrying out such a movement under the control of the control logic 15 as shown in the partial figure 4.

Ainsi que représenté sur la figure 5, les lames 35a, 35b, 35c ont un angle au sommet A qui est légèrement inférieur à l'angle des dièdres 19 et qui est préférentiellement de l'ordre de 86° de façon qu'au cours de leur mouvement de déplacement vertical v leur extrémité active puisse venir en appui sur la ligne de jonction 19b.As shown in the figure 5 , the blades 35a, 35b, 35c have an angle at the top A which is slightly less than the angle of the dihedrons 19 and which is preferably of the order of 86 ° so that during their movement of vertical displacement v their active end can come to bear on the junction line 19b.

De façon à faciliter le mouvement lorsque la largeur du gabarit de pliage 17 est importante on peut, ainsi que représenté sur la figure 1, faire appel à plusieurs séries de lames, notamment trois séries qui sont disposées dans le prolongement transversal l'une de l'autre et dont le mouvement est synchronisé par la logique de commande 15.In order to facilitate movement when the width of the folding template 17 is large, it is possible, as shown in the figure 1 , call on several series of blades, in particular three series which are arranged in the transverse extension of each other and the movement of which is synchronized by the control logic 15.

On a représenté sur la figure 10 une platine support 38 des vérins 37a, 37b, 37c qui sont destinés à supporter les lames 35a, 35b, 35c et l'on a représenté sur les figures 11 à 13 cette même platine support sur laquelle sont respectivement montées une lame 35a, deux lames 35a et 35b et les trois lames 35a, 35b, et 35c.We have represented on the figure 10 a support plate 38 of the jacks 37a, 37b, 37c which are intended to support the blades 35a, 35b, 35c and is shown in the figures 11 to 13 this same support plate on which are respectively mounted a blade 35a, two blades 35a and 35b and the three blades 35a, 35b, and 35c.

Ainsi que représenté sur les figures 11 et 14a, la première lame, ou lame amont 35a, comporte à chacune de ses extrémités et en son milieu une avancée 35'a dont la base reproduit celle de la lame proprement dite.As shown in the figures 11 and 14a , the first blade, or upstream blade 35a, has at each of its ends and in its middle a projection 35'a whose base reproduces that of the blade itself.

La seconde lame, ou lame médiane 35b, ainsi que représenté sur les figures 12 et 14b, est pourvue à ses extrémités et en son centre d'un évidement 39 qui est destiné à recevoir les avancées 35'a de la lame 35a, ce qui permet à cette dernière de venir en appui contre la lame 35b comme représenté sur la figure 12.The second blade, or middle blade 35b, as shown in the figures 12 and 14b , is provided at its ends and in its center with a recess 39 which is intended to receive the projections 35'a of the blade 35a, which allows the latter to come into abutment against the blade 35b as shown in the figure 12 .

La troisième lame, ou lame aval 35c, qui est représentée sur les figures 13 et 14c est de type classique.The third blade, or downstream blade 35c, which is represented on the figures 13 and 14c is of the classic type.

On décrira ci-après le mouvement qui est appliqué aux différentes lames ainsi qu'au portique 8 qui les supporte au cours d'un cycle complet de l'opération de pliage et qui peut être décomposé en trois phases principales.The movement which is applied to the different blades as well as to the gantry 8 which supports them during a complete cycle of the folding operation and which can be broken down into three main phases will be described below.

Lors de la première phase, l'on part d'une position, représentée sur la figure 15, dans laquelle les trois lames 35a, 35b, 35c sont abaissées et sont appliquées l'une contre l'autre. Dans cette position les avancées 35'a de la lame amont 35a sont logées dans les évidements associés 39 de la lame médiane 35b. La logique 15 commande ensuite les mouvements suivants :

  • les lames médiane 35b et aval 35c sont relevées, et la larme 35a reste enfoncée (figure 16a)
  • les lames médiane 35b et aval 35c sont déplacées vers l'avant par le vérin 40 d'une distance h égale à un écartement e entre deux sommets 19a des dièdres 19 du gabarit de pliage 17, et la lame 35a reste enfoncée (figure 16b),
  • la lame médiane 35b est abaissée dans la dernière pliure effectuée lors du cycle précédent (figure 14c),
During the first phase, we start from a position, represented on the figure 15 , in which the three blades 35a, 35b, 35c are lowered and are pressed against each other. In this position, the projections 35'a of the upstream blade 35a are housed in the associated recesses 39 of the middle blade 35b. Logic 15 then controls the following movements:
  • the middle blades 35b and downstream 35c are raised, and the tear 35a remains pressed ( figure 16a )
  • the middle blades 35b and downstream 35c are moved forward by the jack 40 by a distance h equal to a spacing e between two vertices 19a of the dihedrons 19 of the folding template 17, and the blade 35a remains pressed in ( figure 16b ),
  • the middle blade 35b is lowered in the last fold made during the previous cycle ( figure 14c ),

Lors de la deuxième phase on abaisse la lame aval 35c sur la feuille 33 ce qui vient alors former une nouvelle pliure. On notera que, lors de la formation de cette nouvelle pliure (figure 17), les trois pliures disposées en amont de celle-ci sont solidement maintenues par la lame médiane 35b située en amont de la lame de travail 35c, et par la lame amont 35a et son avancée 35'b, ce qui évite tout glissement de la feuille 33 lors de cette opération. Par ailleurs, notamment en raison du fait que l'angle au sommet A de la lame aval 35c est inférieur à l'angle au sommet des dièdres, le sommet de cette lame peut venir en contact avec la ligne de jonction 19b et amener ainsi la ligne de rainurage de la feuille 33 contre cette ligne de jonction. Un tel dispositif permet ainsi de réaliser, à chaque formation d'un pli, un recentrage de la position d'une ligne de rainurage de la feuille par rapport à une ligne de jonction du gabarit de pliage.During the second phase, the downstream blade 35c is lowered onto the sheet 33, which then forms a new fold. It will be noted that, during the formation of this new fold ( figure 17 ), the three folds disposed upstream thereof are securely held by the middle blade 35b located upstream of the working blade 35c, and by the upstream blade 35a and its projection 35'b, which prevents any sliding of the sheet 33 during this operation. Furthermore, in particular due to the fact that the angle at the apex A of the downstream blade 35c is less than the angle at the apex of the dihedrons, the apex of this blade can come into contact with the junction line 19b and thus bring the grooving line of the sheet 33 against this junction line. Such a device thus makes it possible to carry out, with each formation of a fold, a refocusing of the position of a grooving line of the sheet with respect to a junction line of the folding template.

Lors de la troisième phase on remonte la lame amont 35a (figure 18a) puis on fait avancer le portique 8 d'une valeur h correspondant à l'écartement e existant entre deux sommets consécutifs des dièdres 19 du gabarit de pliage 17, et ceci tout en rétractant le vérin 40 de façon que les lames médiane 35b et aval 35c restent immobiles par rapport à la feuille 33 de façon qu'elles continuent de maintenir les deux derniers plis de la feuille de papier 33 appliqués sur le gabarit de pliage 17. On se retrouve alors dans la position de départ.During the third phase, the upstream blade 35a ( figure 18a ) then the gantry 8 is advanced by a value h corresponding to the spacing e existing between two consecutive vertices of the dihedrons 19 of the folding template 17, and this while retracting the jack 40 so that the middle blades 35b and downstream 35c remain stationary relative to the sheet 33 so that they continue to hold the last two folds of the sheet of paper 33 applied to the folding template 17. We then find ourselves in the starting position.

On notera que, lors de la formation d'un pli par la lame aval 35c (figure 17) lors de la deuxième phase, la partie déjà pliée de la feuille est maintenue d'une part par la lame médiane 35b et, d'autre part, par la lame amont 35a et son avancée 35'a, ce qui lui assure un maintien efficace sur le gabarit de pliage 17.It will be noted that, during the formation of a fold by the downstream blade 35c ( figure 17 ) during the second phase, the already folded part of the sheet is held on the one hand by the middle blade 35b and, on the other hand, by the upstream blade 35a and its projection 35'a, which ensures it is maintained effective on the folding template 17.

On remarquera par ailleurs, qu'au cours de tout le processus de pliage pendant lequel les lames se soulèvent et se déplacent à tout moment, la partie pliée de la feuille est maintenue appliquée contre le gabarit de pliage par au moins une lame. Cette disposition contribue également à prévenir tout glissement de la feuille par rapport au gabarit pendant tout le processus.It will also be noted that, during the entire folding process during which the blades are raised and moved at any time, the folded part of the sheet is kept pressed against the folding template by at least one blade. This arrangement also helps to prevent the sheet from sliding relative to the template during the whole process.

Claims (15)

  1. Device for folding a thin sheet, in particular a sheet of paper (33), along parallel and equidistant scoring lines made thereon, these lines extending transversely from one side of the sheet to the other, which device comprises a frame (3) that is able to receive a folding template (17) of dimensions at least equal to those of the sheet (33) to be bent and that consists of a succession of identical, transverse, adjacent parallel dihedrals (19) separated by a meeting line (19b), and applicator means that are able to move in translation (35a, 35b, 35c), characterized in that the applicator means (35a, 35b, 35c) are able to move in translation in the longitudinal direction of the folding template (17) and are thus able to press, successively, a scoring line of the sheet (33) against a meeting line (19b) of the folding template (17), and in that the device further comprises holding means which are able, during actuation of the applicator means able to move in translation in the longitudinal direction of the folding template (35a, 35b, 35c) over a given meeting line and preferably at any point during the sheet folding operation, to hold at least one scoring line pressed against a meeting line (19b) located upstream of said given meeting line.
  2. Folding device according to Claim 1, characterized in that said upstream meeting line is adjacent to the given meeting line.
  3. Folding device according to either of Claims 1 and 2, characterized in that the applicator means consist of transverse blades (35a, 35b, 35c) that are able to move vertically and are able to enter the volume between dihedrals (19) such that their tip can come to press against the meeting line (19b) and in that the blades (35a, 35b, 35c) are arranged on a gantry (8) that is able to be displaced, under the action of displacement means, in the longitudinal direction of the folding template (17).
  4. Folding device according to Claim 3, characterized in that the displacement means consist of stepper motors controlled by a control logic (15) so as to displace the gantry (8) in equal displacement steps, the displacement step being equal to the distance (e) between two consecutive ridges (19a) of the dihedrals (19) forming the folding template (17).
  5. Folding device according to one of the preceding claims, characterized in that the dihedrals (19) forming the folding template (17) have, passing through them, ducts (23) connected to suction means (29) .
  6. Folding device according to one of Claims 3 to 5, characterized in that at least one of the blades (35a, 35b, 35c) is provided with an actuating means (40) that are able to permit a horizontal displacement movement (h) of the blade.
  7. Folding device according to Claim 6, characterized in that it has three blades, specifically an upstream blade (35a), a downstream blade (35c) and a middle blade (35b).
  8. Folding device according to 7, characterized in that the upstream blade (35a) has extensions (35'a) at least at its ends.
  9. Folding device according to Claim 8, characterized in that the blade (35b) located downstream of the upstream blade (35a) provided with an extension (35'a) has, facing this, a recess (39) that is able to receive said extension (35'a).
  10. Folding device according to one of Claims 7 to 9, characterized in that the downstream (35c) and middle (35b) blades are provided with actuation means (40) that are able to permit a horizontal displacement movement (h) of these blades.
  11. Folding device according to one of Claims 7 to 10, characterized in that the creation of a new fold is brought about by the vertical displacement (v) of the downstream blade (35c).
  12. Method of folding, on a template (17), a thin sheet, in particular a sheet of paper (33), along parallel and equidistant scoring lines made thereon, these lines extending transversely from one side of the sheet (33) to the other, this folding template (17) consisting of a succession of identical, transverse, adjacent parallel dihedrals (19) separated by a meeting line (19b), characterized in that it comprises the steps of:
    - successively pressing a scoring line of the sheet (33) against a given meeting line (19b) of the folding template (17) by means of applicator means that are able to move in translation (35a, 35b, 35c) in the longitudinal direction of the folding template (17),
    - while said applicator means that are able to move in translation in the longitudinal direction of the folding template (35a, 35b, 35c) press, holding at least one marking line against a meeting line located upstream of said given meeting line by means of holding means.
  13. Folding method according to Claim 12, characterized in that use is made of three vertically mobile blades to press the scoring lines of the sheet (33) against the meeting lines of the folding template (17), specifically an upstream blade (35a), a downstream blade (35c) and a middle blade (35b), and in that a new fold is created by the vertical displacement (v) of the downstream blade (35c), at least the middle blade being lowered during this displacement so as to press a previously formed fold against the folding template (17) during this displacement.
  14. Folding method according to Claim 13, characterized in that once the fold has been made, the upstream blade (35a) is returned close to the middle blade (35b) such that extensions (35'a) thereof come into place in corresponding recesses (39) of the middle blade (35b), the downstream blade (35c) being lowered during this movement so as to keep the newly formed fold pressed against the folding template (17).
  15. Folding method according to Claim 14, characterized in that the downstream blade (35c) and the middle blade (35b) are then advanced by a value (e) equal to the spacing between two consecutive peaks of the dihedrals (19) forming the folding template (17) and the middle blade (35b) is lowered into the most recently formed fold, the upstream blade and its extensions remaining lowered during this displacement in the preceding folds.
EP12704291.9A 2011-01-13 2012-01-06 Device for bending a thin sheet Active EP2663517B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1100112A FR2970472B1 (en) 2011-01-13 2011-01-13 FOLDING DEVICE OF A THIN SHEET
PCT/FR2012/000006 WO2012095581A1 (en) 2011-01-13 2012-01-06 Device for bending a thin sheet

Publications (2)

Publication Number Publication Date
EP2663517A1 EP2663517A1 (en) 2013-11-20
EP2663517B1 true EP2663517B1 (en) 2020-04-29

Family

ID=44148946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12704291.9A Active EP2663517B1 (en) 2011-01-13 2012-01-06 Device for bending a thin sheet

Country Status (3)

Country Link
EP (1) EP2663517B1 (en)
FR (1) FR2970472B1 (en)
WO (1) WO2012095581A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10012776B2 (en) * 2015-11-23 2018-07-03 Microsoft Technology Licensing, Llc Optical filters, methods of manufacture, and methods of use

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544639B1 (en) * 1983-04-22 1990-09-14 Laurenti Edmond PORTABLE MANUAL FOLDING PRESS
NL192518C (en) * 1989-01-10 1997-09-02 Oosterbosch Boekbinderij Device for manufacturing a foldable sheet.
US5598650A (en) 1994-09-26 1997-02-04 Brown; Brigitte L. Multi-item display unit
JP3644945B2 (en) * 2003-03-03 2005-05-11 小県精密株式会社 Thin plate material folding device, thin plate material folding method and thin plate material folding jig
WO2005056208A1 (en) * 2003-12-11 2005-06-23 Otkrytoe Aktsionernoe Obschestvo 'kazansky Nauchno-Isledovatelsky Institut Aviatsionnoi Tekhnologii' Device for sheet material corrugation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR2970472B1 (en) 2014-04-04
WO2012095581A1 (en) 2012-07-19
FR2970472A1 (en) 2012-07-20
EP2663517A1 (en) 2013-11-20

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