WO2009004159A2 - System for driving a film of the cinematographic type or the like - Google Patents

System for driving a film of the cinematographic type or the like Download PDF

Info

Publication number
WO2009004159A2
WO2009004159A2 PCT/FR2008/000723 FR2008000723W WO2009004159A2 WO 2009004159 A2 WO2009004159 A2 WO 2009004159A2 FR 2008000723 W FR2008000723 W FR 2008000723W WO 2009004159 A2 WO2009004159 A2 WO 2009004159A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
pulleys
film
base
pulley
Prior art date
Application number
PCT/FR2008/000723
Other languages
French (fr)
Other versions
WO2009004159A3 (en
Inventor
Pierre Frilley
Original Assignee
D 2 A
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 D 2 A filed Critical D 2 A
Publication of WO2009004159A2 publication Critical patent/WO2009004159A2/en
Publication of WO2009004159A3 publication Critical patent/WO2009004159A3/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/08—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material
    • G03D3/13—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly
    • G03D3/14—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly with means for taking into account of elongation or contraction of films

Definitions

  • the present invention relates to the drive systems of films of the cinematographic or similar type which find particularly advantageous applications in the facilities provided for the development of these films.
  • the system described in the second of the two documents cited above comprises a base such as a frame or the like, a film supply reel, a reel of the debit film, a device for pulling the film so as to train it.
  • film guiding means comprising at least first and second pulleys mounted in free rotation around their respective axes of rotation, the second pulleys being mounted in cooperation with the first pulleys so that the film, while scrolling, passes alternately and successively on one of the first pulleys and on one of the second pulleys forming loops or the like, at least two rollers rotatably mounted on the base, each roller being able to drive in rotation one of the first pulleys, means for controlling the rotation of the rollers, means for mounting the axes of rotation of the first pulleys respectively pivoting about pivot axes t integral with the base so that the axis of rotation of each of these pulleys is adapted to take two positions relative to the base, a first position in which the pulle
  • the traction force tends to move the first pulleys from their first position to their second position, that is to say in contact with the rollers, which has the effect of banding the spring associated with each first pulley.
  • the rollers then drive the first rotational pulleys and correlatively the film that passes over them.
  • the speed of rotation of the rollers is adjusted so that the linear velocity of the groove of the pulleys is slightly higher than that given by the initial tension.
  • This process occurs on all the first pulleys associated with rollers capable of driving them in rotation, which contributes to evenly stretching the film between all the pulleys and which allows it to be scrolled by avoiding that it jumps out of the pulleys or that it breaks under the action of too much traction.
  • This training system is commonly used for the development of long films, such as motion pictures.
  • each first pulley acts a spring which constantly tends to bring the pulley in its first position and must be bandaged when it is brought into its second position in contact with its roller coach.
  • the springs have the same elastic variation curve when they are banded, so that they all react substantially in the same way when the tensile force acting on the film decreases as explained above.
  • the present invention aims to achieve a film-like film drive system or the like which allows adjustment of the return force on the first pulleys much easier than with the systems of the prior art like that described above, with the ultimate aim of obtaining a more regular, secure and constant film drive, and thus, in the case of an application of the system to the facilities for the development of motion picture films, a development of these films faster and homogeneous and therefore less expensive.
  • the present invention relates to a drive system in running a film-type film as defined in the appended claim 1.
  • FIG. 1 schematically represents a drive system for a film of the cinematographic type or the like intended to be used, for example, in an installation for the development of such a film, known from the prior art, and
  • FIGS. 2 to 4 show a part of an embodiment of the system according to the invention for driving a film of the cinematographic type or the like for, for example, a development of this film, constituting an improvement of the system shown in Figure 1, in which Figure 2 is a side view and Figures 3 and 4 two front views respectively in two possible configurations of the system during its operation.
  • FIGS. 1 to 4 designate the same elements, whatever the figure on which they appear and whatever the form of representation of these elements. Similarly, if elements are not specifically referenced in one of the figures, their references can be easily found by referring to another figure.
  • FIG. 1 represents, in schematic and partial form, a scrolling drive system for a cinematographic-type film 1 or the like, known from the prior art, in particular from US-A-3 501 076.
  • This prior system comprises a base 10, such as a frame or the like which, according to the development technique of cinematographic films, is intended to be immersed in different trays or placed in chambers, for example drying or the like.
  • a base 10 such as a frame or the like which, according to the development technique of cinematographic films, is intended to be immersed in different trays or placed in chambers, for example drying or the like.
  • the film development technique not falling within the scope of the present invention, it will not be described here, especially since it is well known elsewhere.
  • the system comprises, as illustrated very schematically, means 12 of the film associated with the base, for example a supply reel carrying the film to be developed, and receiving means 14 of the debit film associated with the base, for example a receiver coil adapted to receive the film after it has been developed.
  • means 12 of the film associated with the base for example a supply reel carrying the film to be developed
  • receiving means 14 of the debit film associated with the base for example a receiver coil adapted to receive the film after it has been developed.
  • the system also comprises means 16 for exerting traction on the film 1 so as to drive it in translation according to the arrows 18 at a linear scrolling speed equal to V1, and means 20 for guiding the film 1 during its scrolling in translation between the debtor means 12 and the traction means 16.
  • These guide means 20 of the film comprise at least a first series Si of pulleys 21, 22, ... mounted in free rotation around their respective axes of rotation 23, 24, ... and a second series S2 of pulleys 25, 26, ... mounted in free rotation about their respective axis of rotation 27, 28, ..., the film 1 in succession passing alternatively and successively on a pulley of the first series and on a pulley of the second series forming loops 30.
  • the pulleys 21, 22, ... are all shown in the same plane, that of the figure, which is a possible embodiment. But they can also be positioned one behind the other so that their centers are aligned in a direction AA which, in this figure 1, is shown broken to allow to fold all the pulleys in the plane of the figure so as to do better highlight the structure of the system.
  • These guide means 20 of the film further comprise at least two rollers 40, 41, ... mounted in rotation with respect to the base 10, these two rollers being able to rotate respectively two first and second pulleys 21, 22 of the first series S 1 , and means 44 for controlling the rotation of these rollers 40, 41, ....
  • They further comprise means 46, 48 for mounting the axes of rotation 23, 24 of the first and second pulleys 21, 22 respectively pivoting about two pivot axes 51, 52 associated with the base 10 and not coinciding with the axes of rotation 23, 24 pulleys 21, 22, so that the axis of rotation of each pulley is adapted to take two positions relative to the base 10 (Figure 3 and 4), a first position, Figure 3, in which the pulley 21, 22 is not rotated by the roller 40, 41 which is associated with it, and a second position, Figure 4, wherein the pulley is rotated by the roller associated therewith.
  • these film guiding means 20 comprise means 54, 55, ... for applying an elastic force between respectively each axis of rotation of the first and second pulleys 21, 22 and the base 10 so as to tend to maintain each axis of rotation in its first position.
  • the means for applying an elastic force 54, 55 are constituted, according to this prior art, by a plurality of springs whose disadvantages have been recalled in the preamble of the present description.
  • the system according to the present invention which is more particularly illustrated in FIGS. 2 to 4, comprises the characteristics described above, but the means 54, 55,...
  • the means 54, 55,... For applying an elastic force between respectively the axis of rotation of the two first and second pulleys 21, 22 of the first series S1 and the base 10 so as to tend to maintain each axis of rotation in its first position are constituted by a single sealed envelope 60 of a flexible material, a compressible fluid 61 filling the single sealed envelope, and means 63 for mounting the single sealed envelope 60 in cooperation between, on the one hand, the two axes of rotation 23, 24 of the two first and second pulleys 21, 22, and on the other hand the base 10.
  • the film drive system according to the invention further comprises means 16 for exerting traction on the film 1 so as to drive it in translation in a direction indicated by the arrows 18.
  • these traction means 16 on the film consist of a capstan 70 associated with the base 10, motor means 71 and means 72 for rotatably coupling these motor means 71 and the capstan 70, generally constituted by a line of mechanical transmission between the output shaft of the motor means 71 constituted by an electric motor or the like and the rotation shaft of the capstan.
  • the means 44 for controlling the rotation of the rollers 40, 41, ... are constituted by the same motor means as those referenced 71 which drive the capstan 70 in rotation, and another transmission line 72-1 which allows to couple in rotation, for example by a mechanical connection or the like, these motor means 71 with the rollers 40, 41 in this way that the rotations of the capstan and rollers are perfectly synchronized.
  • the transmission line 72-1 rotatingly coupling the drive means 71 with the rollers 40, 41 comprise a coupler 73 with a given coupling coefficient or variable to be adjustable, disposed at the output of the drive means 71 , for driving the rollers in rotation at a given speed such that, when they cause the first and second pulleys 21, 22 of the first series S1 to rotate, the linear velocity V2 of each point of the grooves of these first and second pulleys is higher, but very slightly, at the linear speed V1 defined above.
  • the means 46, 48 for mounting the axes of rotation 23, 24 of the first and second pulleys 21, 22 pivoting respectively about two pivot axes 51, 52 associated with the base 10 are constituted, for each axis of rotation, Figures 2 to 4, a stirrup 81, 82 having a tab 83, 84, one end of which is pivotally mounted on the pivot axis 51, 52 and a fork 85, 86 (at a or two branches) integral with the other end of the tab, the pulley 21, 22 relative to this axis of rotation being mounted in free rotation on the fork.
  • the means 63 for mounting the single sealed envelope 60 in cooperation between, on the one hand, the two axes of rotation 23, 24 of the first and second pulleys 21, 22 of the first series S1, and secondly the base 10, are constituted, for each pulley, a sleeve 91, 92 or the like, open at both ends and integral with the stirrup 81, 82, and a piece of U 93, 94 associated with the base 10 so that this U-shaped part is contained at least partly in the sleeve 91, 92, the single sealed envelope 60 then being arranged in the two U-shaped parts 93, 94 and the two sleeves 91, 92 so that it is in contact with at least a portion of the inner wall of each U-shaped piece and each sleeve.
  • the single sealed envelope 60 has substantially the shape of a cylindrical pipe and the flexible material in which it is made also has a certain elasticity. It consists for example of a cylindrical silicone tubing or the like.
  • the compressible fluid 61 can be of any type. But it will be advantageously compressed air that can be easily obtained in almost all industrial units.
  • the first and second pulleys 21, 22 of the first series Si are situated in substantially parallel, non-coinciding planes, the loop 30 between these two pulleys affecting the shape of the a turn, Figures 1 and 2.
  • all the pulleys of the second series S 2 will be located in planes substantially parallel to the planes of the pulleys of the first series Si in order essentially to respect the neutral fiber of the film when scrolling. of this film.
  • the system comprises means 100, schematically illustrated in Figure 1, to avoid subjecting the film to overvoltages at the pulleys 25, 26 of the second series S 2 .
  • means 100 are well known in themselves and will not be further described here for the sole purpose of simplifying the present description.
  • the main advantage of the system according to the invention lies in the fact that the single sealed envelope 60 filled with compressible gas applies a force between the axes 23, 24, ... pulleys 21, 22, ... of the first series S1 and the base 10, which has the same intensity in all respects since it is essentially obtained by the pressure of the compressed gas contained in the chamber 60.
  • the value of the pressure of the gas in the single sealed envelope can be very easily modulated, for example by slaving to the running speed of the film, or any other parameter.
  • the single watertight envelope 60 is made of a flexible material which furthermore has a certain elasticity. This last characteristic is advantageous, in particular in the case where a gas leak occurs at the sealed envelope and / or its supply. Indeed, in this case, the elasticity developed by the material of the envelope will be sufficient to bring all the pulleys of the first series S1 in their first position, thus avoiding a destruction of the film, and to intervene very quickly to quench the escape.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Advancing Webs (AREA)

Abstract

The invention relates to systems for the run driving of film (1). The system of the invention is essentially characterised in that it comprises a base (107), a means (16) for applying a traction on the film (1) to be run, a guiding means including pulleys (21, 22, …) mounted so as to be capable of free rotation about their rotation axes (23, 24, …), at least two rollers (40, 41) controlled in rotation and capable of rotating two of the pulleys (21, 22, …), the rotation axes (23, 24) of the two pulleys (21, 22) pivoting about axes (51, 52) so that the rotation axis of each pulley can assume two positions, i.e. a first position in which the pulley (21, 22) is not rotated by the roller (40, 41) and a second position in which the pulley is rotated, a single sealed envelope (60) of a flexible material, a compressible fluid (61) filling the envelope, and a means (63) for mounting the envelope into interaction with the two rotation axes (23, 24) and the base. The invention can be used for running film in cinematographic film development stations.

Description

SYSTÈME D'ENTRAÎNEMENT D'UN FiLM DU TYPE CINÉMATOGRAPHIQUE OU ANALOGUE SYSTEM FOR TRAINING A FILM OF CINEMATOGRAPHIC OR SIMILAR TYPE
La présente invention concerne les systèmes d'entraînement des films du type cinématographique ou analogue qui trouvent des applications particulièrement avantageuses dans les installations prévues pour le développement de ces films.The present invention relates to the drive systems of films of the cinematographic or similar type which find particularly advantageous applications in the facilities provided for the development of these films.
De tels systèmes d'entraînement de films sont déjà connus, par exemple comme ceux décrits dans les US-A-3 380 678 et 3 501 076.Such film drive systems are already known, for example as those described in US-A-3,380,678 and 3,501,076.
Notamment, le système décrit dans le second des deux documents cités ci-dessus comporte une embase comme un cadre ou analogue, une bobine débitrice du film, une bobine réceptrice du film débité, un dispositif pour tirer sur le film de façon à l'entraîner en translation, des moyens de guidage du film comportant au moins des premières et des secondes poulies montées en rotation libre autour de leur axe de rotation respectif, les secondes poulies étant montées en coopération avec les premières poulies de façon que le film, en défilement, passe alternativement et successivement sur une des premières poulies et sur une des secondes poulies en formant des boucles ou analogues, au moins deux galets montés en rotation sur l'embase, chaque galet étant apte à entraîner en rotation une des premières poulies, des moyens pour commander la rotation des galets, des moyens pour monter les axes de rotation des premières poulies pivotant respectivement autour d'axes de pivotement solidaires de l'embase de façon que l'axe de rotation de chacune de ces poulies soit apte à prendre deux positions par rapport à l'embase, une première position dans laquelle la poulie n'est pas entraînée en rotation par le galet et une seconde position dans laquelle la poulie est entraînée en rotation par le galet, et des ressorts pour appliquer une force élastique entre les axes de rotation des premières poulies et l'embase de façon à tendre à maintenir chaque axe de rotation dans sa première position. Le fonctionnement de ce système connu des hommes du métier sous la terminologie anglaise "demande drive System" est schématiquement décrit ci-après.In particular, the system described in the second of the two documents cited above comprises a base such as a frame or the like, a film supply reel, a reel of the debit film, a device for pulling the film so as to train it. in translation, film guiding means comprising at least first and second pulleys mounted in free rotation around their respective axes of rotation, the second pulleys being mounted in cooperation with the first pulleys so that the film, while scrolling, passes alternately and successively on one of the first pulleys and on one of the second pulleys forming loops or the like, at least two rollers rotatably mounted on the base, each roller being able to drive in rotation one of the first pulleys, means for controlling the rotation of the rollers, means for mounting the axes of rotation of the first pulleys respectively pivoting about pivot axes t integral with the base so that the axis of rotation of each of these pulleys is adapted to take two positions relative to the base, a first position in which the pulley is not rotated by the roller and a second position in which the pulley is rotated by the roller, and springs for applying an elastic force between the axes of rotation of the first pulleys and the base so as to tend to maintain each axis of rotation in its first position. The operation of this system known to those skilled in the art in the English terminology "drive system request" is schematically described below.
Quand le film est tiré pour être entraîné en translation, la force de traction tend à faire passer les premières poulies de leur première position à leur seconde position, c'est-à-dire au contact des galets, ce qui a pour effet de bander le ressort associé à chaque première poulie. Les galets entraînent alors les premières poulies en rotation ainsi que corrélativement le film qui passe sur elles. Cependant la vitesse de rotation des galets est réglée de façon que la vitesse linéaire de la gorge des poulies soit très légèrement supérieure à celle donnée par la traction initiale.When the film is pulled to be driven in translation, the traction force tends to move the first pulleys from their first position to their second position, that is to say in contact with the rollers, which has the effect of banding the spring associated with each first pulley. The rollers then drive the first rotational pulleys and correlatively the film that passes over them. However the speed of rotation of the rollers is adjusted so that the linear velocity of the groove of the pulleys is slightly higher than that given by the initial tension.
S'il se produit en sortie d'une poulie un relâchement du film pour quelque raison que ce soit, la force de traction n'agit plus avec la même intensité sur le film en sortie de la poulie. De ce fait, sous l'action du ressort bandé associé à la poulie, celle-ci a tendance à revenir vers sa première position et à se dégager du galet d'entraînement. A partir de cet instant, la force de traction d'entraînement du film reprend sa fonction en retendant le film et en agissant sur la poulie pour la ramener à sa seconde position au contact du galet qui, à nouveau l'entraîne en rotation.If it occurs at the output of a pulley loosening of the film for whatever reason, the pulling force no longer acts with the same intensity on the film at the output of the pulley. As a result, under the action of the banded spring associated with the pulley, the latter tends to return to its first position and to disengage from the drive roller. From this moment, the film pulling force resumes its function by holding the film and acting on the pulley to bring it back to its second position in contact with the roller which again rotates.
Ce processus se produit sur toutes les premières poulies associées à des galets aptes à les entraîner en rotation, ce qui contribue à tendre uniformément le film entre toutes les poulies et qui permet de le faire défiler en évitant qu'il saute hors des poulies ou qu'il casse sous l'action d'une trop forte traction.This process occurs on all the first pulleys associated with rollers capable of driving them in rotation, which contributes to evenly stretching the film between all the pulleys and which allows it to be scrolled by avoiding that it jumps out of the pulleys or that it breaks under the action of too much traction.
Ce système d'entraînement est couramment utilisé pour le développement des films de grande longueur, comme les films cinématographiques.This training system is commonly used for the development of long films, such as motion pictures.
Le système décrit ci-dessus dans sa structure et son fonctionnement donne de très bons résultats mais présente malgré tout un inconvénient. En effet, comme mentionné ci-dessus, sur l'axe de chaque première poulie agit un ressort qui tend constamment à ramener la poulie dans sa première position et qui doit donc être bandé quand elle est amenée dans sa seconde position au contact de son galet entraîneur. Pour que le système schématiquement décrit ci-dessus fonctionne correctement, il est absolument nécessaire que tous les ressorts aient la même courbe de variation élastique quand ils sont bandés, pour qu'ils réagissent tous sensiblement de la même façon quand la force de traction agissant sur le film diminue comme explicité ci-avant.The system described above in its structure and operation gives very good results but still has a disadvantage. Indeed, as mentioned above, on the axis of each first pulley acts a spring which constantly tends to bring the pulley in its first position and must be bandaged when it is brought into its second position in contact with its roller coach. For the system schematically described above works properly, it is absolutely necessary that all the springs have the same elastic variation curve when they are banded, so that they all react substantially in the same way when the tensile force acting on the film decreases as explained above.
Il est donc impératif que leur réglage soit le plus précis possible. Or, quand on sait que les systèmes de défilement utilisés dans les installations pour le développement des films nécessitent un très grand nombre de premières poulies et donc un très grand nombre de tels ressorts de rappel (voir les deux documents cités auparavant), on conçoit aisément que leur réglage soit long, fastidieux et complexe.It is therefore imperative that their adjustment is as accurate as possible. Now, when it is known that the scrolling systems used in the installations for the development of films require a very large number of first pulleys and therefore a very large number of such springs (see the two documents cited above), it is easy to conceive that their adjustment is long, tedious and complex.
Aussi, la présente invention a-t-elle pour but de réaliser un système d'entraînement de films du type cinématographique ou analogue qui permet un réglage de l'effort de rappel sur les premières poulies beaucoup plus facile qu'avec les systèmes de l'art antérieur comme celui décrit ci-dessus, dans le but final d'obtenir un entraînement des films plus régulier, sécurisé et constant, et donc, dans le cas d'une application du système aux installations pour le développement des films cinématographiques, un développement de ces films plus rapide et homogène et donc moins onéreux.Also, the present invention aims to achieve a film-like film drive system or the like which allows adjustment of the return force on the first pulleys much easier than with the systems of the prior art like that described above, with the ultimate aim of obtaining a more regular, secure and constant film drive, and thus, in the case of an application of the system to the facilities for the development of motion picture films, a development of these films faster and homogeneous and therefore less expensive.
Plus précisément, la présente invention a pour objet un système d'entraînement en défilement d'un film de type cinématographique tel que défini dans la revendication 1 annexée.More specifically, the present invention relates to a drive system in running a film-type film as defined in the appended claim 1.
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif mais nullement limitatif, dans lesquels :Other characteristics and advantages of the invention will appear in the course of the following description given with reference to the accompanying drawings for illustrative but not limiting purposes, in which:
La figure 1 représente schématiquement un système d'entraînement d'un film de type cinématographique ou analogue destiné à être par exemple utilisé dans une installation pour le développement d'un tel film, connu de l'art antérieur, etFIG. 1 schematically represents a drive system for a film of the cinematographic type or the like intended to be used, for example, in an installation for the development of such a film, known from the prior art, and
Les figures 2 à 4 représentent une partie d'un mode de réalisation du système selon l'invention d'entraînement d'un film de type cinématographique ou analogue pour, par exemple, une installation de développement de ce film, constituant un perfectionnement du système illustré sur la figure 1 , dans lesquelles la figure 2 est une vue de côté et les figures 3 et 4 deux vues de face respectivement dans deux configurations possible du système lors de son fonctionnement.FIGS. 2 to 4 show a part of an embodiment of the system according to the invention for driving a film of the cinematographic type or the like for, for example, a development of this film, constituting an improvement of the system shown in Figure 1, in which Figure 2 is a side view and Figures 3 and 4 two front views respectively in two possible configurations of the system during its operation.
Il est tout d'abord précisé que, sur les figures 1 à 4, les mêmes références désignent les mêmes éléments, quelle que soit la figure sur laquelle elles apparaissent et quelle que soit la forme de représentation de ces éléments. De même, si des éléments ne sont pas spécifiquement référencés sur l'une des figures, leurs références peuvent être aisément retrouvées en se reportant à une autre figure.It is first of all specified that, in FIGS. 1 to 4, the same references designate the same elements, whatever the figure on which they appear and whatever the form of representation of these elements. Similarly, if elements are not specifically referenced in one of the figures, their references can be easily found by referring to another figure.
La figure 1 représente sous forme schématique et partielle, un système d'entraînement en défilement d'un film 1 de type cinématographique ou analogue, connu de l'art antérieur notamment par le US-A- 3 501 076.FIG. 1 represents, in schematic and partial form, a scrolling drive system for a cinematographic-type film 1 or the like, known from the prior art, in particular from US-A-3 501 076.
Ce système antérieur comporte une embase 10, comme un cadre ou analogue qui, selon la technique du développement des films cinématographiques, est destiné à être plongé dans différents bacs ou placé dans des chambres, par exemple de séchage ou analogue. La technique du développement des films n'entrant pas dans le cadre de la présente invention, elle ne sera pas décrite ici, d'autant plus qu'elle est bien connue par ailleurs.This prior system comprises a base 10, such as a frame or the like which, according to the development technique of cinematographic films, is intended to be immersed in different trays or placed in chambers, for example drying or the like. The film development technique not falling within the scope of the present invention, it will not be described here, especially since it is well known elsewhere.
Le système comporte, comme illustré de façon très schématique, des moyens débiteurs 12 du film associés à l'embase, par exemple une bobine débitrice portant le film à développer, et des moyens récepteurs 14 du film débité associés à l'embase, par exemple une bobine réceptrice apte à recevoir le film après qu'il ait été développé. Ces moyens sont bien connus en eux-mêmes et ne seront donc pas plus amplement décrits ici.The system comprises, as illustrated very schematically, means 12 of the film associated with the base, for example a supply reel carrying the film to be developed, and receiving means 14 of the debit film associated with the base, for example a receiver coil adapted to receive the film after it has been developed. These means are well known in themselves and will therefore not be more fully described here.
Le système comporte aussi des moyens 16 pour exercer une traction sur le film 1 de façon à l'entraîner en translation selon les flèches 18 suivant une vitesse de défilement linéaire égale à V1 , et des moyens 20 pour guider le film 1 lors de son défilement en translation entre les moyens débiteurs 12 et les moyens de traction 16. Ces moyens de guidage 20 du film comportent au moins une première série Si de poulies 21 , 22, ... montées en rotation libre autour de leur axe de rotation respectif 23, 24, ... et une seconde série S2 de poulies 25, 26, ... montées en rotation libre autour de leur axe de rotation respectif 27, 28, ..., le film 1 en défilement passant alternativement et successivement sur une poulie de la première série et sur une poulie de la seconde série en formant des boucles 30.The system also comprises means 16 for exerting traction on the film 1 so as to drive it in translation according to the arrows 18 at a linear scrolling speed equal to V1, and means 20 for guiding the film 1 during its scrolling in translation between the debtor means 12 and the traction means 16. These guide means 20 of the film comprise at least a first series Si of pulleys 21, 22, ... mounted in free rotation around their respective axes of rotation 23, 24, ... and a second series S2 of pulleys 25, 26, ... mounted in free rotation about their respective axis of rotation 27, 28, ..., the film 1 in succession passing alternatively and successively on a pulley of the first series and on a pulley of the second series forming loops 30.
Sur cette figure 1 , les poulies 21 , 22, ... sont représentées toutes dans le même plan, celui de la figure, ce qui est un mode de réalisation possible. Mais elles peuvent aussi être positionnées les unes derrière les autres de façon que leurs centres soient alignés suivant une direction A-A qui, sur cette figure 1 , est représentée brisée pour permettre de rabattre toutes les poulies dans le plan de la figure de façon à mieux faire ressortir la structure du système.In this figure 1, the pulleys 21, 22, ... are all shown in the same plane, that of the figure, which is a possible embodiment. But they can also be positioned one behind the other so that their centers are aligned in a direction AA which, in this figure 1, is shown broken to allow to fold all the pulleys in the plane of the figure so as to do better highlight the structure of the system.
Ces moyens de guidage 20 du film comportent en outre au moins deux galets 40, 41, ... montés en rotation par rapport à l'embase 10, ces deux galets étant aptes à entraîner en rotation respectivement deux première et seconde poulies 21 , 22 de la première série S1, et des moyens 44 pour commander la rotation de ces galets 40, 41 , ....These guide means 20 of the film further comprise at least two rollers 40, 41, ... mounted in rotation with respect to the base 10, these two rollers being able to rotate respectively two first and second pulleys 21, 22 of the first series S 1 , and means 44 for controlling the rotation of these rollers 40, 41, ....
Ils comportent en outre des moyens 46, 48 pour monter les axes de rotation 23, 24 des première et seconde poulies 21 , 22 pivotant respectivement autour de deux axes de pivotement 51, 52 associés à l'embase 10 et non confondus avec les axes de rotation 23, 24 des poulies 21, 22, de façon que l'axe de rotation de chaque poulie soit apte à prendre deux positions par rapport, à l'embase 10 (Figure 3 et 4), une première position, Figure 3, dans laquelle la poulie 21 , 22 n'est pas entraînée en rotation par le galet 40, 41 qui lui est associé, et une seconde position, Figure 4, dans laquelle la poulie est entraînée en rotation par le galet qui lui est associé.They further comprise means 46, 48 for mounting the axes of rotation 23, 24 of the first and second pulleys 21, 22 respectively pivoting about two pivot axes 51, 52 associated with the base 10 and not coinciding with the axes of rotation 23, 24 pulleys 21, 22, so that the axis of rotation of each pulley is adapted to take two positions relative to the base 10 (Figure 3 and 4), a first position, Figure 3, in which the pulley 21, 22 is not rotated by the roller 40, 41 which is associated with it, and a second position, Figure 4, wherein the pulley is rotated by the roller associated therewith.
Sur la figure 1 qui représente comme mentionné ci-avant un système selon l'art antérieur, ces moyens de guidage du film 20 comportent des moyens 54, 55, ... pour appliquer une force élastique entre respectivement chaque axe de rotation des première et seconde poulies 21 , 22 et l'embase 10 de façon à tendre à maintenir chaque axe de rotation dans sa première position.In FIG. 1 which represents, as mentioned above, a system according to the prior art, these film guiding means 20 comprise means 54, 55, ... for applying an elastic force between respectively each axis of rotation of the first and second pulleys 21, 22 and the base 10 so as to tend to maintain each axis of rotation in its first position.
Les moyens pour appliquer une force élastique 54, 55 sont constitués, selon cet art antérieur, par une pluralité de ressorts dont les inconvénients ont été rappelés au préambule de la présente description.The means for applying an elastic force 54, 55 are constituted, according to this prior art, by a plurality of springs whose disadvantages have been recalled in the preamble of the present description.
Le système selon la présente invention, qui est plus particulièrement illustré sur les figures 2 à 4, comporte les caractéristiques décrites ci- dessus, mais les moyens 54, 55, ... pour appliquer une force élastique entre respectivement l'axe de rotation des deux première et seconde poulies 21 , 22 de la première série S1 et l'embase 10 de façon à tendre à maintenir chaque axe de rotation dans sa première position sont constitués par une enveloppe étanche unique 60 en un matériau souple, un fluide compressible 61 emplissant l'enveloppe étanche unique, et des moyens 63 pour monter l'enveloppe étanche unique 60 en coopération entre, d'une part les deux axes de rotation 23, 24 des deux première et seconde poulies 21 , 22, et d'autre part l'embase 10.The system according to the present invention, which is more particularly illustrated in FIGS. 2 to 4, comprises the characteristics described above, but the means 54, 55,... For applying an elastic force between respectively the axis of rotation of the two first and second pulleys 21, 22 of the first series S1 and the base 10 so as to tend to maintain each axis of rotation in its first position are constituted by a single sealed envelope 60 of a flexible material, a compressible fluid 61 filling the single sealed envelope, and means 63 for mounting the single sealed envelope 60 in cooperation between, on the one hand, the two axes of rotation 23, 24 of the two first and second pulleys 21, 22, and on the other hand the base 10.
Le système d'entraînement de film selon l'invention comporte en outre des moyens 16 pour exercer une traction sur le film 1 de façon à l'entraîner en translation selon une direction indiquée par les flèches 18. Selon une caractéristique avantageuse de l'invention, ces moyens de traction 16 sur le film sont constitués par un cabestan 70 associé à l'embase 10, des moyens moteurs 71 et des moyens 72 pour coupler en rotation ces moyens moteurs 71 et le cabestan 70, généralement constitués d'une ligne de transmission mécanique entre l'arbre de sortie des moyens moteurs 71 constitués d'un moteur électrique ou analogue et l'arbre de rotation du cabestan.The film drive system according to the invention further comprises means 16 for exerting traction on the film 1 so as to drive it in translation in a direction indicated by the arrows 18. According to an advantageous characteristic of the invention these traction means 16 on the film consist of a capstan 70 associated with the base 10, motor means 71 and means 72 for rotatably coupling these motor means 71 and the capstan 70, generally constituted by a line of mechanical transmission between the output shaft of the motor means 71 constituted by an electric motor or the like and the rotation shaft of the capstan.
Selon une réalisation préférentielle, les moyens 44 pour commander la rotation des galets 40, 41 , ... sont constitués par les mêmes moyens moteurs que ceux référencés 71 qui entraînent le cabestan 70 en rotation, et une autre ligne de transmission 72-1 qui permet de coupler en rotation, par exemple par une liaison mécanique ou analogue, ces moyens moteurs 71 avec les galets 40, 41 de cette façon que les rotations du cabestan et des galets sont parfaitement synchronisées. Cependant, selon une réalisation avantageuse, la ligne de transmission 72-1 couplant en rotation les moyens moteurs 71 avec les galets 40, 41 comportent un coupleur 73 à coefficient de couplage donné ou variable pour pouvoir être ajusté, disposé en sortie des moyens moteurs 71 , pour entraîner les galets en rotation à une vitesse donnée telle que, lorsqu'ils entraînent la rotation des première et seconde poulies 21 , 22 de la première série S1 , la vitesse linéaire V2 de chaque point des gorges de ces première et seconde poulies soit supérieure, mais très légèrement, à la vitesse linéaire V1 définie ci-avant.According to a preferred embodiment, the means 44 for controlling the rotation of the rollers 40, 41, ... are constituted by the same motor means as those referenced 71 which drive the capstan 70 in rotation, and another transmission line 72-1 which allows to couple in rotation, for example by a mechanical connection or the like, these motor means 71 with the rollers 40, 41 in this way that the rotations of the capstan and rollers are perfectly synchronized. However, according to an advantageous embodiment, the transmission line 72-1 rotatingly coupling the drive means 71 with the rollers 40, 41 comprise a coupler 73 with a given coupling coefficient or variable to be adjustable, disposed at the output of the drive means 71 , for driving the rollers in rotation at a given speed such that, when they cause the first and second pulleys 21, 22 of the first series S1 to rotate, the linear velocity V2 of each point of the grooves of these first and second pulleys is higher, but very slightly, at the linear speed V1 defined above.
Selon une autre caractéristique avantageuse de l'invention, les moyens 46, 48 pour monter les axes de rotation 23, 24 des première et seconde poulies 21 , 22 pivotant respectivement autour de deux axes de pivotement 51, 52 associés à l'embase 10 sont constitués, pour chaque axe de rotation, figures 2 à 4, d'un étrier 81 , 82 comportant une patte 83, 84 dont une extrémité est montée pivotante sur l'axe de pivotement 51, 52 et une fourche 85, 86 (à une ou deux branches) solidaire de l'autre extrémité de la patte, la poulie 21, 22 relative à cet axe de rotation étant montée en rotation libre sur la fourche.According to another advantageous characteristic of the invention, the means 46, 48 for mounting the axes of rotation 23, 24 of the first and second pulleys 21, 22 pivoting respectively about two pivot axes 51, 52 associated with the base 10 are constituted, for each axis of rotation, Figures 2 to 4, a stirrup 81, 82 having a tab 83, 84, one end of which is pivotally mounted on the pivot axis 51, 52 and a fork 85, 86 (at a or two branches) integral with the other end of the tab, the pulley 21, 22 relative to this axis of rotation being mounted in free rotation on the fork.
Selon une autre caractéristique avantageuse de l'invention, les moyens 63 pour monter l'enveloppe étanche unique 60 en coopération entre, d'une part les deux axes de rotation 23, 24 des deux première et seconde poulies 21 , 22 de la première série S1 , et d'autre part l'embase 10, sont constitués, pour chaque poulie, d'un manchon 91 , 92 ou analogue, ouvert à ses deux extrémités et solidaire de l'étrier 81 , 82, et d'une pièce en U 93, 94 associée à l'embase 10 de façon que cette pièce en U soit contenue au moins en partie dans le manchon 91 , 92, l'enveloppe étanche unique 60 étant alors disposée dans les deux pièces en U 93, 94 et les deux manchons 91 , 92 de façon qu'elle soit au contact d'au moins une partie de la paroi intérieure de chaque pièce en U et de chaque manchon.According to another advantageous characteristic of the invention, the means 63 for mounting the single sealed envelope 60 in cooperation between, on the one hand, the two axes of rotation 23, 24 of the first and second pulleys 21, 22 of the first series S1, and secondly the base 10, are constituted, for each pulley, a sleeve 91, 92 or the like, open at both ends and integral with the stirrup 81, 82, and a piece of U 93, 94 associated with the base 10 so that this U-shaped part is contained at least partly in the sleeve 91, 92, the single sealed envelope 60 then being arranged in the two U-shaped parts 93, 94 and the two sleeves 91, 92 so that it is in contact with at least a portion of the inner wall of each U-shaped piece and each sleeve.
De façon avantageuse, l'enveloppe étanche unique 60 a sensiblement la forme d'une tubulure cylindrique et le matériau souple dans lequel elle est réalisée présente en outre une certaine élasticité. Elle est par exemple constituée d'une tubulure cylindrique en silicone ou analogue.Advantageously, the single sealed envelope 60 has substantially the shape of a cylindrical pipe and the flexible material in which it is made also has a certain elasticity. It consists for example of a cylindrical silicone tubing or the like.
De plus, le fluide 61 compressible peut être de tout type. Mais il sera avantageusement de l'air comprimé qui peut être facilement obtenu dans presque toutes les unités industrielles.In addition, the compressible fluid 61 can be of any type. But it will be advantageously compressed air that can be easily obtained in almost all industrial units.
De façon avantageuse, dans un souci de moindre encombrement du système notamment en longueur, les première et seconde poulies 21 , 22 de la première série Si sont situées dans des plans sensiblement parallèles non confondus, la boucle 30 entre ces deux poulies affectant la forme d'une spire, figures 1 et 2.Advantageously, for the sake of less congestion of the system, particularly in length, the first and second pulleys 21, 22 of the first series Si are situated in substantially parallel, non-coinciding planes, the loop 30 between these two pulleys affecting the shape of the a turn, Figures 1 and 2.
De plus, dans ce cas, de façon préférentielle, toutes les poulies de la seconde série S2 seront situées dans des plans sensiblement parallèles aux plans des poulies de la première série Si dans le but essentiellement de respecter la fibre neutre du film lors du défilement de ce film.In addition, in this case, preferably, all the pulleys of the second series S 2 will be located in planes substantially parallel to the planes of the pulleys of the first series Si in order essentially to respect the neutral fiber of the film when scrolling. of this film.
De plus, il est avantageux que le système comporte des moyens 100, schématiquement illustrés sur la figure 1 , pour éviter de soumettre le film à des surtensions au niveau des poulies 25, 26 de la seconde série S2. Ces moyens 100 sont bien connus en eux-mêmes et ne seront pas plus amplement décrits ici dans le seul souci de simplifier la présente description.In addition, it is advantageous that the system comprises means 100, schematically illustrated in Figure 1, to avoid subjecting the film to overvoltages at the pulleys 25, 26 of the second series S 2 . These means 100 are well known in themselves and will not be further described here for the sole purpose of simplifying the present description.
Le fonctionnement du système d'entraînement de film selon l'invention est identique, dans sa fonction générale, à celui du système selon l'art antérieur référencé ci-avant.The operation of the film drive system according to the invention is identical in its general function to that of the system according to the prior art referenced above.
L'avantage principal du système selon l'invention, par rapport au système de l'art antérieur, réside dans le fait que l'enveloppe étanche unique 60 emplie de gaz compressible applique une force entre les axes 23, 24, ... des poulies 21, 22, ... de la première série S1 et l'embase 10, qui a la même intensité en tous points puisqu'elle est essentiellement obtenue par la pression du gaz comprimé contenu dans la chambre 60.The main advantage of the system according to the invention, compared with the system of the prior art, lies in the fact that the single sealed envelope 60 filled with compressible gas applies a force between the axes 23, 24, ... pulleys 21, 22, ... of the first series S1 and the base 10, which has the same intensity in all respects since it is essentially obtained by the pressure of the compressed gas contained in the chamber 60.
En conséquence, lorsque les poulies de la première série S1 passent de leur première position à la seconde, la force de rappel élastique engendrée par l'enveloppe étanche unique 60 emplie de gaz compressible est, elle aussi, exactement la même pour toutes les poulies. II existe un autre avantage, le fait de pouvoir, pour quelque raison que ce soit, régler simultanément toutes les forces de rappel agissant sur les poulies de la première série S1 , puisque ce réglage consiste uniquement dans le réglage de la pression d'alimentation du gaz dans l'enveloppe étanche unique 60.Consequently, when the pulleys of the first series S1 pass from their first position to the second, the elastic restoring force generated by the single sealed envelope 60 filled with compressible gas is also exactly the same for all the pulleys. There is another advantage, the fact of being able, for whatever reason, to simultaneously adjust all the restoring forces acting on the pulleys of the first series S1, since this adjustment consists solely in the adjustment of the feed pressure of the gas in the single sealed envelope 60.
De plus, la valeur de la pression du gaz dans l'enveloppe étanche unique pourra être très facilement modulée, par exemple par asservissement à la vitesse de défilement du film, ou tout autre paramètre.In addition, the value of the pressure of the gas in the single sealed envelope can be very easily modulated, for example by slaving to the running speed of the film, or any other parameter.
La description faite ci-dessus a été limitée à deux poulies de la première série Si, mais il est bien évident que l'homme du métier saura sans difficulté appliquer l'invention mutatis mutandis à un nombre beaucoup plus élevé de poulies, par exemple à toutes les poulies de la première série Si auxquelles sera associée une même enveloppe étanche unique 60.The above description has been limited to two pulleys of the first series Si, but it is quite obvious that those skilled in the art will easily be able to apply the invention mutatis mutandis to a much larger number of pulleys, for example to all the pulleys of the first series Si to which will be associated the same single sealed envelope 60.
Il a été mentionné que l'enveloppe étanche unique 60 est réalisée dans un matériau souple présentant en outre une certaine élasticité. Cette dernière caractéristique est avantageuse, notamment dans le cas où il se produirait une fuite de gaz au niveau de l'enveloppe étanche et/ou de son alimentation. En effet, dans ce cas, l'élasticité développée par le matériau de l'enveloppe sera suffisante pour ramener toutes les poulies de la première série S1 dans leur première position, évitant de ce fait une destruction du film, et intervenir très rapidement pour étancher la fuite. It has been mentioned that the single watertight envelope 60 is made of a flexible material which furthermore has a certain elasticity. This last characteristic is advantageous, in particular in the case where a gas leak occurs at the sealed envelope and / or its supply. Indeed, in this case, the elasticity developed by the material of the envelope will be sufficient to bring all the pulleys of the first series S1 in their first position, thus avoiding a destruction of the film, and to intervene very quickly to quench the escape.

Claims

R E V E N D I C A T I O N S
1. Système d'entraînement en défilement d'un film (1) de type cinématographique ou analogue, comportant :1. Drive system in running a film (1) of the cinematographic type or the like, comprising:
• une embase (10),A base (10),
• des moyens débiteurs (12) du film associés à ladite embase,Means (12) of the film associated with said base,
• des moyens récepteurs (14) du dit film débité associés à ladite embase,• receiving means (14) of said cut film associated with said base,
• des moyens (16) pour exercer une traction sur le film (1) de façon à l'entraîner en translation (18) suivant une vitesse de défilement linéaire égale à V1 ,Means (16) for exerting traction on the film (1) so as to drive it in translation (18) at a linear scrolling speed equal to V1,
• des moyens (20) pour guider ledit film (1) lors de son défilement en translation entre les moyens débiteurs (12) et les moyens de traction (16), ces moyens de guidage (20) du film comportant au moins une première série Si de poulies (21 , 22, ...) montées en rotation libre autour de leur axe de rotation respectif (23, 24, ...) et une seconde série S2 de poulies (25, 26, ...) montées en rotation libre autour de leur axe de rotation respectif (27, 28, ...), le film en défilement passant alternativement et successivement sur une poulie de la première série et sur une poulie de la seconde série en formant des boucles (30), au moins deux galets (40, 41, ...) montés en rotation par rapport à ladite embase (10), ces deux galets étant aptes à entraîner en rotation respectivement deux première et seconde poulies (21 , 22) de la première série Si, des moyens (44) pour commander la rotation des dits galets (40, 41 , ...), des moyens (46, 48) pour monter les axes de rotation (23, 24) des première et seconde poulies (21 , 22) pivotant respectivement autour de deux axes de pivotement (51 , 52) associés à ladite embase (10) et non confondus avec les axes de rotation (23, 24) des poulies (21 , 22), de façon que l'axe de rotation de chaque poulie soit apte à prendre deux positions par rapport à ladite embase (10), une première position (Fig. 3) dans laquelle la poulie (21 , 22) n'est pas entraînée en rotation par le galet (40, 41) qui lui est associé, et une seconde position (Fig. 4) dans laquelle la poulie est entraînée en rotation par le galet qui lui est associé, et des premiers et seconds moyens (54, 55, ...) pour appliquer une force élastique entre respectivement l'axe de rotation des deux première et seconde poulies (21 , 22) et ladite embase (10) de façon à tendre à maintenir chaque axe de rotation dans sa première position, caractérisé par le fait que les premiers et seconds moyens (54, 55, ...) pour appliquer une force élastique entre respectivement l'axe de rotation des deux première et seconde poulies (21 , 22) et ladite embase (10) de façon à tendre à maintenir chaque axe de rotation dans sa première position, sont constitués par :Means (20) for guiding said film (1) as it moves in translation between the debtor means (12) and the traction means (16), these guide means (20) for the film comprising at least a first series If pulleys (21, 22, ...) mounted in free rotation about their respective axis of rotation (23, 24, ...) and a second series S 2 of pulleys (25, 26, ...) mounted in free rotation around their respective axis of rotation (27, 28, ...), the moving film passing alternatively and successively on a pulley of the first series and on a pulley of the second series forming loops (30) at least two rollers (40, 41, ...) rotatably mounted relative to said base (10), these two rollers being adapted to rotate respectively two first and second pulleys (21, 22) of the first series If, means (44) for controlling the rotation of said rollers (40, 41, ...), means (46, 48) for mounting the rotational axes n (23, 24) of the first and second pulleys (21, 22) respectively pivoting about two pivot axes (51, 52) associated with said base (10) and not coinciding with the axes of rotation (23, 24) of pulleys (21, 22), so that the axis of rotation of each pulley is adapted to take two positions relative to said base (10), a first position (Fig. 3) in which the pulley (21, 22) is not rotated by the roller (40, 41) associated with it, and a second position (Fig. 4) in which the pulley is rotated by the roller associated therewith, and first and second means (54, 55, ...) for applying an elastic force between respectively the axis of rotation of the first and second pulleys (21, 22 ) and said base (10) so as to tend to maintain each axis of rotation in its first position, characterized in that the first and second means (54, 55, ...) for applying an elastic force between respectively the axis of rotation of the two first and second pulleys (21, 22) and said base (10) so as to tend to maintain each axis of rotation in its first position, are constituted by:
• une enveloppe étanche unique (60) en un matériau souple,A single sealed envelope (60) made of a flexible material,
• un fluide compressible (61) emplissant ladite enveloppe étanche unique, etA compressible fluid (61) filling said single sealed envelope, and
• des moyens (63) pour monter ladite enveloppe étanche unique (60) en coopération entre, d'une part les deux axes de rotation (23, 24) des deux première et seconde poulies (21 , 22), et d'autre part ladite embase (10).Means (63) for mounting said single sealed envelope (60) in cooperation between, on the one hand, the two axes of rotation (23, 24) of the first and second pulleys (21, 22), and on the other hand said base (10).
2. Système selon la revendication 1 , caractérisé par le fait que les moyens (16) pour exercer une traction sur le film (1) de façon à l'entraîner en translation sont constitués par un cabestan (70) associé à ladite embase (10), des moyens moteurs (71) et des moyens (72) pour coupler en rotation lesdits moyens moteurs (71) et ledit cabestan (70).2. System according to claim 1, characterized in that the means (16) for exerting traction on the film (1) so as to drive it in translation are constituted by a capstan (70) associated with said base (10). ), motor means (71) and means (72) for rotatably coupling said motor means (71) and said capstan (70).
3. Système selon la revendication 2, caractérisé par le fait que les moyens (44) pour commander la rotation des dits galets (40, 41 , ...) sont constitués par lesdits moyens moteurs (71) et une ligne de transmission (72- 1) pour coupler en rotation ces dits moyens moteurs (71) avec lesdits galets.3. System according to claim 2, characterized in that the means (44) for controlling the rotation of said rollers (40, 41, ...) are constituted by said motor means (71) and a transmission line (72). - 1) for coupling in rotation said motor means (71) with said rollers.
4. Système selon la revendication 3, caractérisé par le fait que la ligne de transmission (72-1) pour coupler en rotation lesdits moyens moteurs (71) avec lesdits galets (40, 41) comporte un coupleur (73) en sortie des moyens moteurs (71) pour entraîner les galets en rotation de façon que, lorsqu'ils entraînent la rotation des première et seconde poulies (21 , 22), la vitesse linéaire V2 en tous points des gorges des première et seconde poulies soit supérieure à la vitesse linéaire V1.4. System according to claim 3, characterized in that the transmission line (72-1) for rotatably coupling said motor means (71) with said rollers (40, 41) comprises a coupler (73) at the output of the means. motors (71) for driving the rollers in rotation so that, when they cause the rotation of the first and second pulleys (21, 22), the speed linear V2 in all points of the grooves of the first and second pulleys is greater than the linear velocity V1.
5. Système selon l'une des revendications 1 à 4, caractérisé par le fait que les moyens (46, 48) pour monter les axes de rotation (23, 24) des première et seconde poulies (21 , 22) pivotant respectivement autour de deux axes de pivotement (51, 52) associés à ladite embase (10), sont constitués, pour chaque axe de rotation, d'un étrier (81, 82) comportant une patte (83, 84) dont une extrémité est montée pivotante sur ledit axe de pivotement (51 , 52) et une fourche (85, 86) solidaire de l'autre extrémité de ladite patte, la poulie (21 , 22) relative au dit axe de rotation étant montée en rotation libre sur ladite fourche.5. System according to one of claims 1 to 4, characterized in that the means (46, 48) for mounting the axes of rotation (23, 24) of the first and second pulleys (21, 22) respectively pivoting around two pivot axes (51, 52) associated with said base (10) are constituted, for each axis of rotation, of a yoke (81, 82) having a tab (83, 84), one end of which is pivotally mounted on said pivot axis (51, 52) and a fork (85, 86) integral with the other end of said tab, the pulley (21, 22) relative to said axis of rotation being mounted in free rotation on said fork.
6. Système selon la revendication 5, caractérisé par le fait que les moyens (63) pour monter ladite enveloppe étanche unique (60) en coopération entre, d'une part les deux axes de rotation (23, 24) des deux première et seconde poulies (21 , 22), et d'autre part ladite embase (10), sont constitués, pour chaque poulie, d'un manchon (91 , 92) ouvert à ses deux extrémités et solidaire du dit étrier (81 , 82) et d'une pièce en U (93, 94) associée à ladite embase (10) de façon que cette pièce en U soit contenue au moins en partie dans ledit manchon (91 , 92), ladite enveloppe étanche unique (60) étant disposée dans les deux dites pièces en U (93, 94) et les deux dits manchons (91 , 92) de façon qu'elle soit au contact d'au moins une partie de la paroi intérieure de chaque pièce en U et de chaque manchon.6. System according to claim 5, characterized in that the means (63) for mounting said single sealed envelope (60) in cooperation between, on the one hand the two axes of rotation (23, 24) of the first two and second pulleys (21, 22), and secondly said base (10), are constituted, for each pulley, a sleeve (91, 92) open at both ends and integral with said stirrup (81, 82) and a U-shaped piece (93, 94) associated with said base (10) so that said U-shaped piece is contained at least partly in said sleeve (91, 92), said single sealed envelope (60) being disposed in the two said U-shaped pieces (93, 94) and the two said sleeves (91, 92) so that it is in contact with at least a portion of the inner wall of each U-shaped piece and each sleeve.
7. Système selon la revendication 6, caractérisé par le fait que ladite enveloppe étanche unique (60) a sensiblement la forme d'une tubulure cylindrique.7. System according to claim 6, characterized in that said single sealed envelope (60) has substantially the shape of a cylindrical tube.
8. Système selon l'une des revendications précédentes, caractérisé par le fait que le matériau souple dans lequel est réalisée ladite enveloppe étanche unique (60) présente en outre une certaine élasticité. 8. System according to one of the preceding claims, characterized in that the flexible material in which is formed said single sealed envelope (60) further has a certain elasticity.
9. Système selon l'une des revendications précédentes, caractérisé par le fait que les première et seconde poulies (21 , 22) de la première série Si sont situées dans des plans sensiblement parallèles non confondus, ladite boucle (30) affectant la forme d'une spire.9. System according to one of the preceding claims, characterized in that the first and second pulleys (21, 22) of the first series Si are located in substantially parallel planes not merged, said loop (30) affecting the shape of a turn.
10. Système selon l'une des revendications précédentes, caractérisé par le fait que ledit fluide (61) compressible est de l'air comprimé. 10. System according to one of the preceding claims, characterized in that said fluid (61) compressible is compressed air.
PCT/FR2008/000723 2007-06-05 2008-05-28 System for driving a film of the cinematographic type or the like WO2009004159A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0703976 2007-06-05
FR0703976A FR2917193B1 (en) 2007-06-05 2007-06-05 SYSTEM FOR DRIVING FILM OF THE CINEMATOGRAPHIC OR SIMILAR TYPE

Publications (2)

Publication Number Publication Date
WO2009004159A2 true WO2009004159A2 (en) 2009-01-08
WO2009004159A3 WO2009004159A3 (en) 2009-02-19

Family

ID=38657227

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2008/000723 WO2009004159A2 (en) 2007-06-05 2008-05-28 System for driving a film of the cinematographic type or the like

Country Status (2)

Country Link
FR (1) FR2917193B1 (en)
WO (1) WO2009004159A2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224947A (en) * 1938-02-21 1940-12-17 Cinaudagraph Corp Film processing apparatus
GB901009A (en) * 1957-06-28 1962-07-11 Newman & Guardia Ltd Improvements relating to photographic developing and like apparatus
US3380678A (en) * 1966-06-06 1968-04-30 Eastman Kodak Co Web transport system
GB1166393A (en) * 1966-02-16 1969-10-08 Arnold & Richter Kg Film Feed Magazines for Photographic Film Processing Machines.
US3501076A (en) * 1967-07-21 1970-03-17 Photomec London Ltd Drive system for film processing apparatus
GB1224187A (en) * 1968-04-11 1971-03-03 Ralph Glendon Matheson Machine and method for processing photographic film

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224947A (en) * 1938-02-21 1940-12-17 Cinaudagraph Corp Film processing apparatus
GB901009A (en) * 1957-06-28 1962-07-11 Newman & Guardia Ltd Improvements relating to photographic developing and like apparatus
GB1166393A (en) * 1966-02-16 1969-10-08 Arnold & Richter Kg Film Feed Magazines for Photographic Film Processing Machines.
US3380678A (en) * 1966-06-06 1968-04-30 Eastman Kodak Co Web transport system
US3501076A (en) * 1967-07-21 1970-03-17 Photomec London Ltd Drive system for film processing apparatus
GB1224187A (en) * 1968-04-11 1971-03-03 Ralph Glendon Matheson Machine and method for processing photographic film

Also Published As

Publication number Publication date
WO2009004159A3 (en) 2009-02-19
FR2917193B1 (en) 2009-09-11
FR2917193A1 (en) 2008-12-12

Similar Documents

Publication Publication Date Title
EP0383673B1 (en) Device for separating and aligning objects, and sorting arrangement using this device
CH623792A5 (en)
EP0270419A1 (en) Manually controlled wrapping device of parts, such as, especially, cable harnesses
CH643667A5 (en) SCANNING APPARATUS FOR A PHOTOCOPIER.
CH662342A5 (en) APPARATUS FOR POLISHING THE END OF A FIBER OPTIC ELEMENT.
FR2479939A1 (en) ROLLER-TYPE PLANETARY GEARS HAVING PRELOADING ARRANGEMENT
EP0638496A1 (en) Method and means for introducing sheet-like material in a machine
FR2488819A1 (en) APPARATUS FOR STRAIGHTENING STEEL TUBES AND THE LIKE
FR2595675A1 (en) METHOD AND APPARATUS FOR DISPENSING AND WINDING PACKAGING PAPER
EP0179709A1 (en) Method and apparatus for continuously stretching a plastics film
WO2009004159A2 (en) System for driving a film of the cinematographic type or the like
EP0033258A2 (en) Wind turbine with an adjustably orientable rotor axis
FR2876365A1 (en) METHOD AND APPARATUS FOR COIL WINDING OF A BAND
FR2651335A1 (en) MOTORIZED PHOTOGRAPHIC APPARATUS.
EP0332510B1 (en) Apparatus for stretching a plastic film
FR2499531A1 (en) TRANSPORT DEVICE FOR INDIVIDUAL SHEETS ASSEMBLED IN A BATTERY
FR2971176A1 (en) ULTRASONIC SOLDERING DEVICE
FR2528929A1 (en) IMPROVEMENTS IN MECHANICAL DEVICES FOR SELECTIVE DRIVING OF AT LEAST TWO SHAFTS DRIVEN FROM A SINGLE DRIVING SHAFT, IN PARTICULAR FOR THE LONGITUDINAL MOVEMENT OF AN INK RIBBON IN A PRINTING MACHINE
FR2664249A1 (en) DEVICE FOR SCROLLING MATERIALS IN THE FORM OF BANDS.
FR3059655A1 (en) ADHESIVE DISPENSER AND SHEET CONNECTING DEVICE HAVING SUCH A DISPENSER
FR2633996A1 (en) Device for reducing rotation between a driving shaft and a driven shaft
EP0099154A1 (en) Photographic shutter with roller blinds
FR2696660A1 (en) Automatic high speed grading appts. for fruit and vegetables - has roller conveyor driven by drive belt and by endless belt travelling at different speeds
FR2530597A1 (en) DEVICE FOR TENDING A BAND OR PART OF BAND ARRANGING AND ROLLING IN RELATION TO TWO ROLLS
FR2544702A1 (en) Device enabling a plastic film to be drawn between two rollers and packaging machines comprising it

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08805614

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08805614

Country of ref document: EP

Kind code of ref document: A2