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EP0306415A1 - Dispensing device for objects with a polygonal cross-section assuring their constant orientation - Google Patents

Dispensing device for objects with a polygonal cross-section assuring their constant orientation Download PDF

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Publication number
EP0306415A1
EP0306415A1 EP88420278A EP88420278A EP0306415A1 EP 0306415 A1 EP0306415 A1 EP 0306415A1 EP 88420278 A EP88420278 A EP 88420278A EP 88420278 A EP88420278 A EP 88420278A EP 0306415 A1 EP0306415 A1 EP 0306415A1
Authority
EP
European Patent Office
Prior art keywords
chamber
chute
objects
register
air jet
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.)
Withdrawn
Application number
EP88420278A
Other languages
German (de)
French (fr)
Inventor
Robert Mailliet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dite Ter (Techniques Etudes Et Realisations) Ste
Original Assignee
Dite Ter (Techniques Etudes Et Realisations) Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dite Ter (Techniques Etudes Et Realisations) Ste filed Critical Dite Ter (Techniques Etudes Et Realisations) Ste
Publication of EP0306415A1 publication Critical patent/EP0306415A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/10—Feeding, e.g. conveying, single articles
    • B65B35/12—Feeding, e.g. conveying, single articles by gravity

Definitions

  • the improvements which are the subject of the present invention aim to allow the realization of a distributor of objects with polygonal section which ensures them a constant orientation so that the latter can, for example, be engaged around a punch of the same profile in plan so that they are moved by said punch to receive an impression or be transferred to any workstation.
  • the dispenser according to the invention comprises a chute into which the objects fall and which opens into a chamber one of the walls of which in profile assumes the shape of a V open at almost 180 ° with its vertical edge arranged in the plane of symmetry of the chamber, in that there is provided an air jet directed towards the middle of the edge of the V and in that the bottom of the chamber is formed partially by a sliding damper which releases the object moving in the direction of the air jet.
  • the V-shaped wall is oriented obliquely, its slope being turned towards the top.
  • the chamber also has two opposite lateral cheeks, oriented parallel to the air jet and spaced about 0.2 mm more than the value of the diameter of the circle circumscribed in the section of the objects.
  • the body of the dispensing device according to the invention has been referenced 1 and which is produced by means of two shells assembled by means of plates 2 and 3 and of screws not shown.
  • a central frustoconical chute 4 leading to a chamber 5 located under the body 1.
  • One of the walls of the chamber 5 is constituted by the wall 6 ′ of a block 6, mounted at articulation around a horizontal axis 7 and whose inclination is adjustable by means of two screws 8, 9.
  • the wall 6a assumes in profile in plan the shape of a V open at almost 180 ° with its vertical edge arranged in the plane of symmetry of the chamber 5.
  • the angle of the V is preferably, but not exclusively, 178 °.
  • the wall 6a is oriented obliquely with its slope facing the chute 4.
  • an injector 10 supported by the plate 3 and intended for the production of a jet of compressed air directed in the center of the face 6a.
  • the chamber 5 is further limited by two transverse cheeks 11,12 (fig. 2 and 3) suitably fixed below the two shells forming the body 1 by means of screws 13.
  • the cheeks could be fixed in any other way appropriately.
  • the cheeks have a length such that they extend between the two plates 2 and 3 (fig.l). Their spacing is very slightly greater than the diameter of the circle circumscribed at the polygon representing the cross section of an object 14 which it is desired to distribute on a punch 15 constantly oriented and mounted on a chain 16 moving on a table 17.
  • the one of the faces of the punch is of course located exactly below the wall 6a.
  • the body 1 is fixed to a support 18 integral with the frame of the machine comprising the chain 16 and the support 18 and which has not been shown.
  • a vertical bar 19 is welded or fixed in any other way to the plate 2 at the level of the chamber 5. It has two horizontal bores crossed by two bars 20, 21, the two outer ends of which are assembled with a pull tab 22. Each of the rods is integral with a collar 23, 24 itself supporting one end of a rod 25, 26 whose opposite end is associated with a register 27, 28. The rods 25, 26 are oriented perpendicular to the bars 20 , 21.
  • the register 27 is arranged at the level of the outlet towards the bottom of the chute 4, while the register 28 is in a plane situated just below the block 6. As illustrated in FIG. 1, when the register Z7 closes the chute 4, the register 28 is erased, that is to say that it is located under the block 6. On the contrary when the pull tab 22 is brought into the position closest to the distributor , and which is shown in broken lines, the register 27 releases the chute 4 while the register 28 closes a part of the underside of the chamber 5 which is adjacent to the wall 6a.
  • the hollow polygonal object 14 falls regularly in a flexible pipe 29 terminating above the chute 4 and it is placed on the register 27 as illustrated by dotted lines in FIG. 1.
  • the chute 4 has a circular shape in cross section and that its outlet downwards, that is to say its end situated above the register 27, has a diameter slightly greater than that circumscribed at the polygon representing the section of the object 14.
  • the latter has a hexagonal section and the clearance provided is of the order of 0.2mm, that is to say that the diameter considered is in this case equal to the distance between the cheeks 11,12.
  • the pull tab 22 is then pushed back so that the register 28 is placed in the axis of the chute 4.
  • the object 14 falls vertically and comes to rest on said register 28. It is easily understood as illustrated in FIG. 3, that the faces of said object must not come into contact with the wall 6a and that, consequently, it is only the angles of the object which can come into contact with said wall 6a. This ensures that the faces of the object will not be scratched. Obviously the object 15 can fall on the register 8 in any orientation.
  • a distributor of objects of polygonal section has thus been produced which ensures perfect orientation of said objects to allow them to be placed on a punch of the same shape and having a determined orientation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

It comprises a body (1) provided with a chute (4) which emerges in a chamber (5), of which one of the walls (6a) has, in plan profile, the shape of a V open at almost 180 DEG , with its vertical edge arranged in the plane of symmetry of the chamber, characterised in that a jet of air directed towards the middle of the edge of the V is provided, and in that the bottom of the chamber consists of a sliding gate (28) which releases the object (14) by moving in the direction of the jet of air. <IMAGE>

Description

0n sait que dans l'industrie de luxe, par exemple celle des parfums ou des cosmétiques, il existe des étuis ou flacons à section polygonale qui doivent être manipulés de manière qu'absolument aucune trace de rayure n'apparaisse sur leurs faces.We know that in the luxury industry, for example that of perfumes or cosmetics, there are cases or bottles with polygonal section which must be handled in such a way that absolutely no trace of scratch appears on their faces.

0r les objets en question doivent être manipulés dans leurs opérations successives de fabrication et en particulier de décoration.0r the objects in question must be handled in their successive operations of manufacture and in particular of decoration.

Les perfectionnements qui font l'objet de la présente invention visent à permettre la réalisation d'un distributeur d'objets à section polygonale qui leur assure une orientation constante afin gue ces derniers puis­sent, par exemple, être engagés autour d'un poinçon de même profil en plan afin qu'ils soient déplacés par ledit poinçon pour recevoir une impression ou être tranférés vers un poste de travail quelconque.The improvements which are the subject of the present invention aim to allow the realization of a distributor of objects with polygonal section which ensures them a constant orientation so that the latter can, for example, be engaged around a punch of the same profile in plan so that they are moved by said punch to receive an impression or be transferred to any workstation.

A cet effet le distributeur suivant l'invention comporte une goulotte dans laquelle les objets tombent et qui débouche dans une chambre dont l'une des parois affecte en profil en plan la forme d'un V ouvert à presque 180° avec son arête verticale disposée dans le plan de symétrie de la chambre, en ce qu'il est prévu un jet d'air dirigé vers le milieu de l'arête du V et en ce que le fond de la chambre est constitué par­tiellement par un registre coulissant qui libère l'objet en se déplaçant dans le sens du jet d'air.For this purpose the dispenser according to the invention comprises a chute into which the objects fall and which opens into a chamber one of the walls of which in profile assumes the shape of a V open at almost 180 ° with its vertical edge arranged in the plane of symmetry of the chamber, in that there is provided an air jet directed towards the middle of the edge of the V and in that the bottom of the chamber is formed partially by a sliding damper which releases the object moving in the direction of the air jet.

Dans un mode d'exécution préféré de la disposition qui précède, la paroi en V est orientée obliquement, sa pente étant tournée en direction du haut.In a preferred embodiment of the above arrangement, the V-shaped wall is oriented obliquely, its slope being turned towards the top.

La chambre comporte encore deux joues latérales opposées, orientées parallèlement au jet d'air et espacées d'environ 0,2mm de plus que la valeur du diamètre du cercle circoncrit à la section des objets.The chamber also has two opposite lateral cheeks, oriented parallel to the air jet and spaced about 0.2 mm more than the value of the diameter of the circle circumscribed in the section of the objects.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Fig. 1 est une coupe longitudinale d'un distributeur établi confor­mément à l'invention.
  • Fig. 2 est une coupe suivant II-II (fig.1). On y a représenté en I-I le plan de coupe de fig. 1.
  • Fig. 3 est une coupe suivant III-III (fig. 1).
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a longitudinal section of a dispenser established in accordance with the invention.
  • Fig. 2 is a section along II-II (fig. 1). There is shown in II the section plane of FIG. 1.
  • Fig. 3 is a section along III-III (fig. 1).

En fig. 1, on a reférencé 1 le corps du dispositif distributeur suivant l'invention et qui est réalisé au moyen de deux coquilles assemblées au moyen de plaques 2 et 3 et de vis non représentées. Dans le corps 1 est creusé une goulotte tronconique centrale 4 aboutissant à une chambre 5 située sous le corps 1.In fig. 1, the body of the dispensing device according to the invention has been referenced 1 and which is produced by means of two shells assembled by means of plates 2 and 3 and of screws not shown. In the body 1 is hollowed out a central frustoconical chute 4 leading to a chamber 5 located under the body 1.

L'une des parois de la chambre 5 est constituée par la paroi 6ª d'un bloc 6, monté à articulation autour d'un axe horizontal 7 et dont l'in­clinaison est réglable au moyen de deux vis 8, 9. Dans un mode d'exécu­tion préféré la paroi 6ª affecte en profil en plan la forme d'un V ou­vert à presque 180° avec son arête verticale disposée dans le plan de symétrie de la chambre 5. L'angle du V est préférablement, mais non exclusivement, de 178°. La paroi 6ª est orientée obliquement avec sa pente tournée vers la goulotte 4. A l'opposé du bloc 6, et dans son axe de symétrie est placé un injecteur 10, soutenu par la plaque 3 et desti­né à la production d'un jet d'air comprimé dirigé dans le centre de la face 6ª.One of the walls of the chamber 5 is constituted by the wall 6 ′ of a block 6, mounted at articulation around a horizontal axis 7 and whose inclination is adjustable by means of two screws 8, 9. In one mode of preferred execution, the wall 6ª assumes in profile in plan the shape of a V open at almost 180 ° with its vertical edge arranged in the plane of symmetry of the chamber 5. The angle of the V is preferably, but not exclusively, 178 °. The wall 6ª is oriented obliquely with its slope facing the chute 4. Opposite the block 6, and in its axis of symmetry is placed an injector 10, supported by the plate 3 and intended for the production of a jet of compressed air directed in the center of the face 6ª.

La chambre 5 est encore limitée par deux joues transversales 11,12 (fig. 2 et 3) convenablement fixées au-dessous des deux coquilles for­mant le corps 1 au moyen de vis 13. Bien entendu la fixation des joues pourrait être réalisée de toute autre manière appropriée. Les joues ont une longueur telle qu'elles s'étendent entre les deux plaques 2 et 3 (fig.l). Leur écartement est très légèrement supérieur au diamètre du cercle circonscrit au polygone représentant la section transversale d'un objet 14 qu'on désire distribuer sur un poinçon 15 orienté de manière constante et monté sur une chaîne 16 se déplaçant sur une table 17. L'une des faces du poinçon est bien entendu située exactement en dessous de la paroi 6ª.The chamber 5 is further limited by two transverse cheeks 11,12 (fig. 2 and 3) suitably fixed below the two shells forming the body 1 by means of screws 13. Of course the cheeks could be fixed in any other way appropriately. The cheeks have a length such that they extend between the two plates 2 and 3 (fig.l). Their spacing is very slightly greater than the diameter of the circle circumscribed at the polygon representing the cross section of an object 14 which it is desired to distribute on a punch 15 constantly oriented and mounted on a chain 16 moving on a table 17. The one of the faces of the punch is of course located exactly below the wall 6ª.

0n observe que le corps 1 est fixé à un support 18 solidaire du bâti de la machine comportant la chaîne 16 et le support 18 et qui n'a pas été représenté.It can be seen that the body 1 is fixed to a support 18 integral with the frame of the machine comprising the chain 16 and the support 18 and which has not been shown.

Une barrette verticale 19 est soudée ou fixée de toute autre manière à la plaque 2 au niveau de la chambre 5. Elle comporte deux alésages hori­zontaux traversés par deux barres 20, 21 dont les deux extrémités exté­rieures sont assemblées à une tirette 22. Chacune des tiges est solidai­re d'un collier 23, 24 lui-même supportant l'une des extrémités d'une tige 25, 26 dont l'extrémité opposée est associée à un registre 27, 28. Les tiges 25, 26 sont orientées perpendiculairement aux barres 20, 21. Le registre 27 est disposé au niveau du débouché vers le bas de la goulotte 4, tandis gue le registre 28 se trouve dans un plan situé juste en dessous du bloc 6. Comme illustré en fig. 1, lorsque le registre Z7 ferme la goulotte 4, le registre 28 est effacé, c'est-à-dire qu'il se trouve sous le bloc 6. Au contraire quand la tirette 22 est amenée dans la position la plus proche du distributeur, et que l'on a représentée en traits discontinus, le registre 27 libère la goulotte 4 tandis que le registre 28 obture une partie du dessous de la chambre 5 qui est adja­cente à la paroi 6ª.A vertical bar 19 is welded or fixed in any other way to the plate 2 at the level of the chamber 5. It has two horizontal bores crossed by two bars 20, 21, the two outer ends of which are assembled with a pull tab 22. Each of the rods is integral with a collar 23, 24 itself supporting one end of a rod 25, 26 whose opposite end is associated with a register 27, 28. The rods 25, 26 are oriented perpendicular to the bars 20 , 21. The register 27 is arranged at the level of the outlet towards the bottom of the chute 4, while the register 28 is in a plane situated just below the block 6. As illustrated in FIG. 1, when the register Z7 closes the chute 4, the register 28 is erased, that is to say that it is located under the block 6. On the contrary when the pull tab 22 is brought into the position closest to the distributor , and which is shown in broken lines, the register 27 releases the chute 4 while the register 28 closes a part of the underside of the chamber 5 which is adjacent to the wall 6ª.

Le fonctionnement est le suivant :The operation is as follows:

L'objet polygonal creux 14, tombe de manière régulière dans une tuyaute­rie souple 29 aboutissant au dessus de la goulotte 4 et il vient se placer sur le registre 27 comme illustré en traits pointillés en fig. 1. On notera que la goulotte 4 présente en section transversale une forme circulaire et que son débouché vers le bas, c'est-à-dire son extrémité située au-dessus du registre 27, présente un diamètre légèrement supé­rieur à celui circonscrit au polygone représentant la section de l'objet 14. Dans le cas considéré ce dernier a une section hexagonale et le jeu prévu est de l'ordre de 0,2mm c'est-à-dire que le diamètre considéré est dans ce cas égal à la distance séparant les joues 11,12.The hollow polygonal object 14, falls regularly in a flexible pipe 29 terminating above the chute 4 and it is placed on the register 27 as illustrated by dotted lines in FIG. 1. It will be noted that the chute 4 has a circular shape in cross section and that its outlet downwards, that is to say its end situated above the register 27, has a diameter slightly greater than that circumscribed at the polygon representing the section of the object 14. In the case considered the latter has a hexagonal section and the clearance provided is of the order of 0.2mm, that is to say that the diameter considered is in this case equal to the distance between the cheeks 11,12.

La tirette 22 est ensuite repoussée de manière que le registre 28 vienne se placer dans l'axe de la goulotte 4. L'objet 14 tombe verticalement et vient reposer sur ledit registre 28. On comprend aisément comme on l'a illustré en fig. 3, que les faces dudit objet ne doivent pas entrer en contact avec la paroi 6ª et qu'en conséquence ce ne sont que les angles de l'objet qui peuvent venir en contact avec ladite paroi 6ª. On est ainsi assuré que les faces de l'objet ne seront pas rayées. Bien entendu l'objet 15 peut tomber sur le registre 8 dans n'importe quelle orien­tation.The pull tab 22 is then pushed back so that the register 28 is placed in the axis of the chute 4. The object 14 falls vertically and comes to rest on said register 28. It is easily understood as illustrated in FIG. 3, that the faces of said object must not come into contact with the wall 6ª and that, consequently, it is only the angles of the object which can come into contact with said wall 6ª. This ensures that the faces of the object will not be scratched. Obviously the object 15 can fall on the register 8 in any orientation.

L'effet conjugué du jet d'air propulsé par l'injecteur 10 et du déplace­ment du registre 28 dans le même sens que ce jet d'air, entraîne automa­tiquement l'orientation adéquate de l'objet 14 tel qu'on l'a illustré en fig. 3, c'est-à-dire qu'il se trouve très exactement orienté comme le poinçon 15. Ainsi lors de l'effacement du registre 28, on est assuré que l'objet vienne chevaucher exactement ce dernier. Le poinçon est ensuite évacué par la chaîne 16 et une nouvelle opération semblable peut s'ef­fectuer avec la pièce suivante qui est arrivée sur le registre 27.The combined effect of the air jet propelled by the injector 10 and the movement of the damper 28 in the same direction as this air jet, automatically causes the correct orientation of the object 14 as we have illustrated in fig. 3, that is to say that it is very exactly oriented like the punch 15. Thus when the register 28 is erased, it is ensured that the object comes to overlap exactly the latter. The punch is then evacuated by the chain 16 and a new similar operation can be carried out with the next part which has arrived on the register 27.

On a ainsi réalisé un distributeur d'objets à section polygonale qui assure une orientation parfaite desdits objets pour permettre leur mise en place sur un poinçon de même forme et présentant une orientation déterminée.A distributor of objects of polygonal section has thus been produced which ensures perfect orientation of said objects to allow them to be placed on a punch of the same shape and having a determined orientation.

Claims (6)

1. Distributeur d'objets (14) à section polygonale assurant leur orien­tation constante du genre comportant un corps (1) pourvu d'une goulotte (4) dans laquelle les objets (14) tombent, caractérisé en ce que la goulotte (4) débouche dans une chambre (5) dont l'une des parois (6ª) affecte en profil en plan la forme d'un V ouvert à presque 180° avec son arête verticale disposée dans le plan de symétrie de la chambre, en ce qu'il est prévu un jet d'air dirigé vers le milieu de l'arête du V et en ce que le fond de la chambre est constitué par un registre coulissant (28) qui libère l'objet (14) en se déplaçant dans le sens du jet d'air.1. Object distributor (14) with polygonal section ensuring their constant orientation of the kind comprising a body (1) provided with a chute (4) into which the objects (14) fall, characterized in that the chute (4) opens into a chamber (5) one of the walls (6ª) of which, in profile in plan, takes the form of a V open at almost 180 ° with its vertical edge arranged in the plane of symmetry of the chamber, in that there is provided an air jet directed towards the middle of the edge of the V and in that the bottom of the chamber is constituted by a sliding damper (28) which releases the object (14) by moving in the direction of the air jet. 2. Distributeur suivant la revendication 1, caractérisé en ce que la paroi en V (6ª) est orientée obliquement, sa pente étant tournée en direction du haut.2. Distributor according to claim 1, characterized in that the V-shaped wall (6ª) is oriented obliquely, its slope being turned towards the top. 3. Dispositif suivant la revendication 2, caractérisé en ce que la paroi en V (6ª) est l'une des faces d'un bloc (6) monté orientable par rapport au corps (1).3. Device according to claim 2, characterized in that the V-shaped wall (6ª) is one of the faces of a block (6) mounted orientable relative to the body (1). 4. Dispositif suivant l'une quelconque des revendications 1 à 3, carac­térisé en ce que la chambre (5) comporte deux joues latérales (11,12) opposées, orientées parallèlement au jet d'air et espacée d'une distance légèrement plus grande que la valeur du diamètre du cercle circonscrit à la section des objets (14).4. Device according to any one of claims 1 to 3, characterized in that the chamber (5) comprises two opposite side cheeks (11,12), oriented parallel to the air jet and spaced a slightly greater distance than the value of the diameter of the circle circumscribed in the section of objects (14). 5. Dispositif suivant la revendicaiton 4, caractérisé en ce que la gou­lotte est prévue tronconique avec ouverture vers le haut, son diamètre inférieur étant égal à la distance séparant les joues (11,12).5. Device according to claim 4, characterized in that the chute is provided frustoconical with opening upwards, its smaller diameter being equal to the distance separating the cheeks (11,12). 6. Dispositif suivant l'une quelconque des revendications 1 à 5, carac­térisé en ce qu'un second registre (27) décalé par rapport au premier et solidaire de celui-ci ferme le bas de la goulotte (4) quand ledit pre­mier registre (28) est déplacé pour libérer la pièce (14) convenablement orientée.6. Device according to any one of claims 1 to 5, characterized in that a second register (27) offset relative to the first and integral with the latter closes the bottom of the chute (4) when said first register ( 28) is moved to release the part (14) properly oriented.
EP88420278A 1987-08-07 1988-08-05 Dispensing device for objects with a polygonal cross-section assuring their constant orientation Withdrawn EP0306415A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8711445 1987-08-07
FR8711445A FR2619085B1 (en) 1987-08-07 1987-08-07 DISTRIBUTOR OF OBJECTS WITH POLYGONAL SECTION ENSURING THEIR CONSTANT ORIENTATION

Publications (1)

Publication Number Publication Date
EP0306415A1 true EP0306415A1 (en) 1989-03-08

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Application Number Title Priority Date Filing Date
EP88420278A Withdrawn EP0306415A1 (en) 1987-08-07 1988-08-05 Dispensing device for objects with a polygonal cross-section assuring their constant orientation

Country Status (2)

Country Link
EP (1) EP0306415A1 (en)
FR (1) FR2619085B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301298A (en) * 1952-03-17 1954-08-31 Limited Visual Efficiency Entrance corridor.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301298A (en) * 1952-03-17 1954-08-31 Limited Visual Efficiency Entrance corridor.

Also Published As

Publication number Publication date
FR2619085A1 (en) 1989-02-10
FR2619085B1 (en) 1990-06-15

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