EP1111570A1 - System and device for mounting display bands - Google Patents

Abstract

Fitting procedure for poster strips in rotary prismatic holder, involves covering with plastic strips and sliding in place with gripper Inserting poster strips into a prismatic holder (1) consists of covering each side of the poster strips with a layer of self-adhesive transparent plastic and then inserting each strip (5) between the edges of transparent retaining elements (13, 14) along the sides of each of the prismatic holder's faces. The strip can be pushed or pulled into place, using a gripping tool with two thin plates (21, 22) and a handle, which can be manually or automatically operated.

Description

The present invention relates to a method of laying display strip on a display panel subdivided into several partial panels, each with two longitudinal edges and two front edges, including cutting the poster into strips with obverse and reverse, and inserting a poster strip cut between a partial panel and, along each edge longitudinal of this partial panel, at least one retaining element extending so as to cover at least one marginal area of the bandaged. It also relates to a device for the implementation of this process as well as a display panel allowing this setting artwork.

We have known for a long time billboards large dimensions, several meters long and high, which consist of a support frame in which a panel is arranged stationary. On this one we stick manually strips poster using pot glue and brushes. It's a very work tedious where the operator gets dirty easily and must stick the poster in accessing it on a ladder. In addition, it is necessary to regularly scrape the panels to put down the previous posters, which is laborious and pollutes the environment.

We have also known panels for a long time with prisms rotating around vertical axes, which allow the support in general of three posters on the same panel. These signs are called "trivision signs".

Currently, the installation and tearing of the strips on the faces of the rotating prisms are still done usually manually on site, with all the disadvantages of collage and scraping that we imagine. We have also already planned the installation and removing the strips in the workshop, using prisms to removable and transportable blades. However, these processes time consuming, which adds to the cost of display.

We have already tried to solve these problems by putting on by machine the reverse side of the poster strips with double adhesive tape face protected by an external protective strip.

Machines for cutting posters into fitted strips such double-sided adhesive tape, the back of which is protected by a protective tape and to wind the composite product into a coil transportable are already described for example in FR-A-2,631,577, the WO-91/13424 and WO-99/29606.

Apparatus for placing and removing posters in situ precut into strips and fitted with the bonding system described above on advertising panels are already known (see by example FR-B-2,643,487).

The process implemented by this device presents the downside that complex adhesion systems are difficult to control under very variable atmospheric conditions that know the billboards. Plus, they always end up foul the surfaces of the prisms to be covered. In addition, the installation and removal of the strips is difficult to handle and requires his carriage the presence of three coils, to drive so perfectly synchronized. The device therefore presents between the motor drive and the coils supported on the carriage a transmission very complex, which has proven in practice very difficult to master.

Other less complex tools, because they are not motorized, are also provided for sliding carriages along the prisms, at using a handle (FR-A-2693821 and FR-A-2740597).

In order to resolve all of these problems, several attempts have been made to be able to display signs "trivision" of the poster strips without using a gluing system.

We have already planned to provide each of the faces of the transparent plastic sheathing prisms that wrap around the entire face of the prism and slide into the cavity formed a strip of poster paper using a rigid strip that forces the poster strip inside the sheath (EP-A-0644520). This device presents the disadvantage that the entire surface of the poster is covered with plastic sheaths that alter the vision of the poster, whether by fouling or by reflection. In addition, inevitable condensation occurs produced inside the sheaths which also disturbs vision and can cause deterioration of the paper strips. The pose itself is complex and the risk of tearing poster strips during this one is relatively large.

We also know a display device where the bands are pretreated by being glued on a semi-rigid plastic film tape with shape memory, which is previously shaped for have flaps along its marginal edges. These flaps are slipped between an elastically deformable slat, previously applied to the prism face, and this prism face (WO-00/10152). This device has the disadvantage of having to use a support very specific which requires a thick material and a process of forming, and elastic slats, which greatly increases costs. he it is also compulsory to completely renew the existing fleet of "trivision" display panels so that the slats can be adapted necessary for fixing the shaped ribbons, which support the poster strips.

We finally know a rotating prism for panel advertising which presents in the region of its longitudinal edges lips adapted for retaining the longitudinal edges of the strips poster (see FR-A-2,683,658). The establishment of the bands is done by appropriate tools which allow the edges of the strip to be engaged under retaining lips. These special rotating prisms require however replacing the prisms of the existing fleet of panels "trivision". In addition, the unglued paper poster strips are exposed to unprotected weather. This results in rapid deterioration of the bands due to the succession of periods of rain and sunshine. Small display panels, formed of luminous prisms containing a light source, apply the same type of lateral lips (see EP-B-0569326).

The object of the present invention is to solve the problems mentioned above, and in particular to apply current poster strips on display panels without the use of glue or adhesive tapes making the strips adhere to the panels. Application and removal strips must be fast while ensuring positioning perfect strips, no puckering, no tilting, no tears, and they should advantageously be able to be carried out by a single man to from the ground or from a height corresponding to the bottom of the panel. The panels currently in service should advantageously be able to be used in the context of the invention without requiring a replacement and the tapes displayed must be able to undergo bad weather conditions. Advantageously, the process and the laying device according to the invention will lead to an overall reduction and drastic operating costs.

These problems are solved by a method as described in this process further comprising an adhesion between the reverse of each strip and a first single-sided adhesive tape and / or between the obverse of each strip and a second single-sided adhesive tape made of material transparent, and, after the above insertion of a front strip portion poster thus provided with at least one simple adhesive tape facing one first end of the partial panel, an application of a force of thrust and / or traction on this front part so as to cause the strip towards a second end of the partial panel, opposite the first, with sliding of the strip between the partial panel and said at least one retainer.

By these measures, strips of poster paper completely currents are reinforced on their surface and therefore do not have shrinking or puckering phenomenon in the presence of conditions variable climatic conditions. Preferably the single-sided adhesive tape covers the entire surface of the strip. This reinforcement of the bands allows in addition to causing the strip to slide, without the risk of tearing it, despite the retaining force applied on its edges by the elements of detention.

Adhesion between the adhesive tape (s) and the strip can take place before or after cutting the strip from the poster the latter, in a manner conforming to the technique of cut known, aforementioned.

According to one embodiment of the invention, the method includes, prior to accession, a continuous supply of said first and / or second single-sided adhesive tape, then after adhesion and cutting, winding of the first and / or second adhesive tape single face which supports in succession all the cut strips of a poster, a sequence of a first rolled up poster strip with the aforementioned insertion of its front part, and, at the end of said sliding, a sectioning of the first and / or second adhesive tape nearby of a rear edge of said first strip, then an unwinding of a second rolled up poster strip, and so on. The process of laying thus comprises a method of manufacturing coils on which all the bands necessary for a poster are supported in succession. A common machine such as that described for example in WO-99/29606 can be used to manufacture these coils, in replacing double sided tape with simple tape face, transparent or not depending on the case. You can apply a tape possibly non-transparent adhesive on the back of the strips poster, transparent adhesive tape on the obverse of the poster strips or both. Such ribbons are common and should not be preformed, they are applied flat on the poster strips. Advantageously, these ribbons are made of an anti-friction material which allows good sliding, which has good dimensional stability in changing climatic conditions and which presents a tear resistance greater than the retaining force of the elements of restraint. Advantageously, the ribbons are made of polypropylene, polyester, polyvinyl chloride or the like, of preferably polypropylene. Advantageous polypropylene ribbons may for example have a thickness of 20 to 50 μ, that is to say ribbons quite available on the market at a very low cost.

The display panel on which the following process the invention is implemented, can be formed for example of a arrangement of fixed partial panels arranged one next to the other, a standard stationary panel subdivided into fixed partial panels by the retaining elements which delimit each partial panel, or again of an arrangement of rotating prisms one next to the other, the faces of the rotating prisms forming the partial panels.

According to one embodiment of the invention, the insertion includes an introduction of side edges of the front part of a display strip cut between a partial panel and at least one retainer extending from each longitudinal edge of this partial panel so as to cover a marginal area of the strip and leave a central area uncovered, and the application of a force takes place in the central area not covered. By this arrangement lateral of retaining elements, for example in the form of slides, advantageously transparent, the poster strips remain at discovered for the most part and no phenomenon of condensation or fouling does not alter the vision of the poster.

We can obviously also consider according to the invention that the retaining elements extend from one edge to the other of the panels partial and then form intermittent transparent sheaths or continued in front of the poster strips.

According to a particular form of the invention, after inserting the side edges of the front of the poster strip at a first end of the partial panel, the method comprises a introduction of a first clamping element between the partial panel and the central area of a front edge of said front band portion poster, a pinching of this central area of the front edge between said first clamping element and a second clamping element, said application of a pushing and / or pulling force on the elements of pinching in the pinched position, a stop of this application when the part front of poster strip was driven to the second end of the partial panel, and a release of the front edge pinched by spacing between the first nip and the second nip. This process allows placement in a very simple way using clamping elements, which can for example be mounted at the end a pole, on an endless belt, or other instrument to apply a push or pull force. By its coating, the poster strip is able to overcome the strength of retain the retainers and not tear when the application of a pulling or pushing force on an edge end of the central zone of the strip. This avoids any mechanism complex and costly to install.

According to an advantageous embodiment of the invention, in the case of rotary prisms formed of several blades detachable which each have one of said several faces, the method further comprises, before said insertion, a pinching of a element for fixing a V-shaped section profile between two blades neighbors mounted, so that a first wing of the V-profile is applied at least partially against the face of a first of said two neighboring blades, approximately over the entire length of at least one second wing of the V-profile is applied partially against the face of a second of said two blades neighbors, approximately over the entire length thereof, the wings of the V-profile thus applied being said retaining element. he It is thus possible according to the invention to simply make use of existing display panels when the blades of these are detachable. Their adaptation is simple and inexpensive and allows retaining bands on all of their lateral edges, this which allows their perfect application on the surface of the prism faces.

Other embodiments of the following process the invention are indicated in the appended claims.

un premier élément de pinçage à introduire entre un panneau partiel et la zone centrale de la partie avant de bande d'affiche dont les bords latéraux sont en position d'insertion susdite à une extrémité du panneau partiel,

un deuxième élément de pinçage agencé par rapport au premier élément de pinçage, de manière à permettre entre eux deux un mouvement relatif entre une position de pinçage de ladite partie avant et une position d'écartement, dans laquelle la partie avant est libérée,

des moyens d'entraínement des premier et deuxième éléments de pinçage le long du panneau partiel, qui permettent un coulissement des bords latéraux de la bande d'affiche à poser dans lesdits éléments de retenue,

et des moyens de commande du mouvement relatif susdit entre le premier élément de pinçage et le deuxième élément de pinçage.

The present invention also relates to a device for implementing a method according to the invention. This device includes

a first clamping element to be introduced between a partial panel and the central zone of the front part of the poster strip, the lateral edges of which are in the abovementioned insertion position at one end of the partial panel,

a second clamping element arranged relative to the first clamping element, so as to allow between them a relative movement between a clamping position of said front part and a spacing position, in which the front part is released,

means for driving the first and second clamping elements along the partial panel, which allow the lateral edges of the poster strip to be placed in said retaining elements to slide,

and means for controlling the above-mentioned relative movement between the first clamping element and the second clamping element.

Other embodiments of the following device the invention are indicated in the appended claims.

The present invention also relates to a panel display for implementing the method according to the invention, this panel being formed from fixed partial panels arranged one next to the other and bearing along each of their longitudinal edges said at minus a retainer.

According to another embodiment of the invention, the panel is formed from a single stationary panel and the panel stationary carries the aforementioned retaining elements which subdivide it into fixed partial panels.

Other details and features of the invention will emerge of the description given below without limitation and with reference to the accompanying drawings.

Figure 1 illustrates a laying method according to the invention on one side of a rotating prism of a trivision-type display panel on which a fitting process is applied.

Figure 2 shows a cross-sectional view of this display panel prism.

Figure 3 shows a sectional view to scale enlarged with a profile serving as a retaining element.

Figures 4 and 5 show a following installation device the invention in a clamping and release position respectively from the poster strip.

Figures 6 to 9 illustrate two embodiments according to the invention of stationary panels.

In the different drawings, identical elements or analogues are designated by the same references.

In Figures 1 and 2, there is shown a rotary prism 1 display panel. This prism 1 has three faces 2 to 4 which form partial panels of the display panel and which are intended to support poster strips 5 previously cut. Each face of the prism has two longitudinal edges 6 and 7 in height and two front edges 8 and 9 in width.

As shown in particular in Figure 2, the prism illustrated is formed by three metal blades 10 to 12 mounted so current detachable, not shown, on an axis 19, capable of drive in rotation. Each blade 10 to 12 thus forms one of the faces 2 to 4 intended to support poster strips 5.

In the example illustrated, each longitudinal edge 6, 7 of each face 2 to 4 is provided with a retaining element, in the form of a slide 13 and respectively 14. This, on approximately the entire longitudinal edge corresponding, extends from this longitudinal edge towards the other over a distance d less than half the width of the corresponding face. In this way, the lateral edges 6 and 7 and the marginal parts of the corresponding face are covered by the slides 13 and 14, while leaving a central portion not covered with a width greater than the sum of the widths of the slides.

In the illustrated embodiment, the slide 13 of the side 2 and the slide 14 of side 3 are made in one piece using a profile 15 of a preferably transparent plastic. This profile has a V shape with one wing forming the slide 13 and the other wing the slide 14. Between these two wings protrudes a wing additional 16 which serves as a fixing element to be pinched between the blades forming the faces 2 and 3. At the free end of the wings forming the slides 13 and 14, thickening 17 is provided and respectively 18. The wings are supported on the blades only through of this thickening 17 or 18, which the wings apply by force elastic against the blades.

In FIGS. 4 and 5, a laying device has been illustrated. according to the invention comprising a pinching blade 20, as the first clamping element, and a clamping tab 21 as second clamping element.

The pinching blade 20 is preferably a thin blade, for example made of metal or rigid plastic, and it is insert between a prism face, for example 2, and the central area 22 of the front part of a poster strip 5 (see Figures 1 and 4). The blade clamp 20 is mounted here in a fixed manner on a support head 23 which is itself mounted on a hollow rod 24, in which can be driven in a pole, not shown, possibly telescopic.

The pinching tab 21 is preferably made of material flexible, flexible like rubber, in its part in contact with the poster strip and it is mounted on the pinching head so as to be able to slide in grooves 25 thereof. By this movement of sliding, the pinching tab 21 can be moved away from the blade pinch 20 (see figure 5) or on the contrary applied against it (see figure 4).

A control handle 26 is also mounted on the clamping head 23 so as to be able to pivot on an axis 27, using of two symmetrical arms, only one of which 28 is shown in the figures 4 and 5. At the end of two other arms of the handle, only one of which 29 is shown, an axis 30 is fixed so as to pass through a hole elongated 31 provided transversely in the pinching tab 21. When a pivoting of the handle 26 to the left in FIG. 4, the axis 30 thus pulls the pinching tab 21 backwards (see FIG. 5).

Inside the head 26, a rod 32 is mounted which makes protruding at the upper end thereof and which is capable of sliding in a limited way in the head cavity. A stop 33 is fixed to its projecting end and a return spring 34 maintains the stop away from the support head 23.

The part of the rod 32 which is located inside the head support 23 is provided with lateral lugs 35 which project laterally outward through elongated side holes 36 of the head 23. In the high position of the stop, the pins 35 are biased towards the top of the holes 36 and there they can fit into a notch 37 of each of the arms 28 of the handle 26. These notches 37 therefore serve to stops for the handle in the clamping position.

A spring 38, for example a leaf spring, is fixed on the support head 23 so as to be applied to the handle 26 and to recall it in a position spaced from the rod 24 (see Figure 5).

To put a poster on a panel as illustrated, you must so first cut the poster into strips, in a way known, for example using a machine as described in WO 99/29606. However, instead of sticking a ribbon to the back of the strips double-sided adhesive, adhere to the entire surface of the backing and / or on the obverse of each strip cut a single-sided adhesive tape. Yes a ribbon is stuck on the obverse, it must be made of a material transparent. The laminate thus obtained therefore has no face adhesive facing outwards. The adhesive tape presents advantageously anti-friction properties to allow good sliding edges in slides 13 and 14. It must advantageously withstand all climatic conditions without unacceptable variation in dimensions and offer good resistance to tear.

You can also make this tape bonding before cutting as indicated for example in WO-91/13424, or following any other appropriate process.

During this bonding step, it is advantageous to follow the steps described for example in WO 99/29606, which make it possible to successively fix all the strips of a single strip on the same tape and even displays and wind it all up in the form of a reel.

The coil, not shown is then placed for example at the bottom of a prism of a trivision-type display panel and a first poster strip with east single-sided tape unfolded.

It then suffices to insert the front part of the strip 5 between the retaining elements formed by the slides 13 and 14 and for example the side 2. In the example illustrated, it suffices to lift slightly thickenings 17 and 18 against the elastic force which remember against side 2, pass the end of the strip underneath and then release the slides.

Then introduced as described above the blade of pinching 20 of the laying device according to the invention, as illustrated, between this front part of the strip 5, in its central zone 22, and this in open position of the clamping head. Then we close it with the handle 26 which is then kept closed in the pinched position by the notches 37. As can be seen in FIG. 1, the pinching of the strip takes place substantially over the entire width of the central zone 22 to nude poster strip.

Using the pole, we can then print a force of pushing or pulling upwards on the central part which has remained bare end of strip, in the direction of arrow F in FIG. 1. This force must be sufficient to overcome the pinching force resulting from the elastic return of the slides 13 and 14 and the strip then slides without problem by being perfectly guided.

When, as illustrated in FIG. 5, the stop 33 comes into contact with a counter stop, in this example the panel frame 39, the return spring 34 is slightly crushed and the pins make a relative downward movement in the holes elongated 36. This results in disengagement from the catch notches 37 and the handle 26 is brought back away from the rod 24 by the leaf spring 38. The handle thus drives to the left in the drawing the tab of pinch 21, which automatically releases the pinched end of the poster. In the maximum compression position of the spring 34, the end upper of the poster came out of the pinching head while remaining applied on the prism face by the retaining slides 13 and 14.

The rear end of the strip is then cut and we can proceed to the application of the next strip on one side of a prism neighbour.

To remove the poster strip, apply a force of reverse push or pull, for example simply at the hand on the lower end of the poster strip.

As can be seen in Figure 2, the prisms used in the example which has just been described are formed of blades detachable. The first step of the process according to the invention goes into this case be to pinch between these blades profiles 15, such as those described and illustrated in Figure 3, to form the side rails in which the marginal edges of the bands can slide.

We can easily see the time savings for installation and placing posters on such a billboard, as well as gain due to cost reduction. Whatever the conditions atmospheric, the bands are mainly maintained by effective mechanical means.

In Figures 6 to 9, two examples of non-limiting production of stationary display panels according to the invention where the method according to the invention can be implemented.

In FIGS. 6 and 7, a display panel 40 partially broken commonly includes a frame 41 supporting a stationary panel 42. On this stationary panel 42 can be fixed side by side of partial panels 43. This fixing can be conceived in any way known to the man of loom, and for example using screws 44. A spacing is maintained, on the one hand, between each partial panel 43 so as to form between two adjacent partial panels a groove 45 and, on the other hand between each partial panel 43 and the stationary panel 42, for example at using a washer 46. A T-shaped retaining element 47, formed a core 48 provided with a terminal thickening 53 and two wings 49 and 50 provided with terminal protrusions 51 and 52, can be pinched between two fixed partial panels 43 neighbors. Partial panels in a such display panel can obviously be provided wider than the prism faces of trivision panels, for example up to two or three times more or more.

In FIGS. 8 and 9, the display panel 40 comprises commonly a frame 41 supporting a stationary panel 42. Suitable holes 54 can be drilled in alignment in the stationary panel, within the limits of the partial panels to be formed. The retaining elements are, in the example illustrated, consisting of a core formed here from a succession of stems 55 thickened at their ends free and spaced from each other by a distance equal to that separating the holes 54, as well as two wings 49 and 50 as provided in the example Figures 6 and 7. After driving the retaining elements into the holes 54 of the stationary panel 42, the retaining elements subdivide it into partial panels 56 on which we can apply poster strips.

It should be understood that the present invention is not in in no way limited to the embodiments described above and that many modifications can be made without departing from the framework of appended claims.

We can for example consider more slides short length arranged in greater number along the edges longitudinal of the faces, or a multiplicity of small jumpers or elastic tabs provided along these.

The slides could be formed in one piece with the blades of rotating prisms, in the form of a single profile in one preferably transparent material. There would then be no more need for clamping or fixing the slides between two neighboring blades.

One could also provide monoblock prisms provided with slides, and in this case we could even imagine a unique profile for the three faces and the six slides.

You can also provide individual slides for each rotating prism blade and not, as in the example illustrated, common profiles for two blades at the same time. In this case the profiles of slides have a V shape with at least one wing applied partially against a prism face and the other wing is pinched between two neighboring blades of the prism.

It is obvious that the wings of the profiles forming the slides are preferably in partial contact with the blades, for example by thickenings 17 and 18, but that it is not excluded that they are in full support over their entire surface on these blades.

The means of driving the pinching head can be not only a pole, but also for example a strip without end which is supported so as to circulate between two return pulleys mounted near the ends of the prisms, for example on the frame, and driven by a motor.

The control means can also be means electric, maneuverable remotely, or a linkage by example mounted in the rod of the pole. In this case, there is no automatic release of tapes.

Claims (24)

Method for installing display strip on a display panel subdivided into several partial panels which each have two longitudinal edges and two front edges, comprising cutting the poster into strips with obverse and reverse, and an insertion of a poster strip cut out between a partial panel and, along each longitudinal edge of this partial panel, at least one retaining element extending so as to cover at least one marginal zone of the strip,
characterized in that it further comprises adhesion between the reverse of each strip and a first single-sided adhesive tape and / or between the obverse of each strip and a second single-sided adhesive tape made of transparent material, and, after the aforementioned insertion of a front portion of poster strip thus provided with at least one single-sided adhesive tape at a first end of the partial panel, application of a pushing and / or pulling force on this portion before so as to drive the strip towards a second end of the partial panel, opposite to the first, with sliding of the strip between the partial panel and said at least one retaining element. Method according to claim 1, characterized in that it includes the adhesion of said first and / or second adhesive tape single sided on the cut strip. Method according to claim 1, characterized in that it includes the adhesion between said first and / or second tape single-sided adhesive and uncut poster and poster cutout in strips provided with said first and / or second simple adhesive tape face. Method according to any of claims 1 to 3, characterized in that it comprises, before adhesion, a supply continuously said first and / or second single-sided adhesive tape, then, after adhesion and cutting, a winding of the first and / or second single-sided adhesive tape which supports in succession all the cut strips of a poster, a sequence of a first poster strip rolled up with the aforementioned insertion of its front part, and, at the end of said sliding, a sectioning of the first and / or second adhesive tape near a rear edge of said first strip, then a sequence of a second rolled up poster strip, and so right now. Method according to any of claims 1 to 4, characterized in that the first and / or second adhesive tape single face is made of an anti-friction material, having good stability dimensional and good tear resistance. Method according to any of claims 1 to 5, characterized in that the first and / or second adhesive tape single face is in a material chosen from the group made up of polypropylenes, polyesters, and polyvinyl chlorides. Method according to any of claims 1 6, characterized in that it comprises an arrangement of panels partial next to each other in a fixed position, so as to form a stationary display panel. Method according to any of claims 1 to 6, characterized in that it comprises a subdivision of a panel stationary display in fixed partial panels by fixing on the stationary display panel of restraining elements each partial panel. method according to any one of claims 1 to 6, characterized in that it comprises an arrangement of rotating prisms with several faces, one next to the other, the faces of the rotating prisms forming the aforementioned partial panels. Method according to any of claims 1 to 9, characterized in that said insertion comprises an introduction of side edges of the front part of a poster strip cut between a partial panel and at least one retaining element extending from each longitudinal edge of this partial panel so as to cover a marginal area of the strip and leave an area uncovered central and in that the application of a force takes place on the area central not covered. Method according to any of claims 1 to 10, characterized in that it further comprises a poster removal, which involves detaching the strips by applying a force of push and / or pull on one end of each strip and a sliding thereof out of said at least one retaining element. Method according to either of Claims 10 and 11, characterized in that, after the insertion of the lateral edges of the front part of the poster strip at a first end of the partial panel, it comprises an introduction of a first clamping element between the partial panel and the central area of a front edge of said front portion of the poster strip, a nipping of this central area of the front edge between said first nipping element and a second nipping element, said application of a pushing and / or pulling force on the clamping elements in the pinched position, a stop of this application when the front portion of the poster strip has been driven to the second end of the partial panel, and a release of the front edge pinched by spacing between the first clamping element and the second clamping element. Method according to claim 12, characterized in that that the cessation of the application of force causes a release automatic front edge. A method according to any of claims 9 to 13, characterized in that, in the case of rotary prisms formed of several detachable blades which each have one of said several faces, it further comprises, before said insertion, a pinching a fastening element for a V-shaped section profile between two neighboring blades fitted, so that a first wing of the V-profile is applied at least partially against the face of a first of said two neighboring blades, approximately over the whole of the length thereof, and that a second wing of the V-profile is applied at least partially against the face of a second of said two neighboring blades, approximately over the entire length of the latter, the wings of the V-profile thus applied being said elements of restraint. A method according to any of the claims 10 to 14, characterized in that, in the inserted position of its edges lateral, the above-mentioned uncovered central zone of the front part of the poster strip has a width greater than the sum of widths of the marginal areas covered and in that the pinching of this central zone takes place substantially over its entire width. Device for installing poster strips (5) for implementing a method according to any one of claims 10 to 15, characterized in that it comprises a first clamping element (20) to be introduced between a partial panel (2-4; 43; 56) and the central zone (22) of the front part of the poster strip, the lateral edges of which are in the above-mentioned insertion position at one end of the partial panel, a second clamping element (21) arranged relative to the first clamping element (20), so as to allow between them a relative movement between a clamping position of said front part and a spacing position, in which the part before is released, drive means (23, 24) of the first and second clamping elements (20, 21) along the partial panel, which allow sliding of the lateral edges of the poster strip (5) to be placed in said elements restraint (13, 14; 49, 50), and control means (26, 30-38) of the aforementioned relative movement between the first clamping element (20) and the second clamping element (21). Device according to claim 16, characterized in that that it further includes stop and release means (32-38) which block, on the one hand, the drive means in a position of final sliding and simultaneously, on the other hand, serve as a means of control actuating a spacing between said first and second clamping elements. Device according to claim 17, characterized in that that it comprises a trainable support (23) by said means drive on which are mounted said first and second clamping elements (20, 21) and the stop and release means (32-38). Device according to claim 18, characterized in that that the first clamping element is a thin, rigid blade (20) fixedly mounted on the support (23) and in that the second clamping element is an elastic counter blade (21) mounted on the support (23) so as to be able to carry out a translational movement towards and vice versa far from the thin blade (20). Device according to one of claims 16 to 19, characterized in that the second clamping element (21) is connected to the support (23) by a gripping handle (26) which is mounted on the support so as to be returned to a return position in which the clamping elements (20, 21) are in the separated position and so that it can be locked in the pinching position of the clamping elements and in that said stop and release means (32-38) unlock the locked handle (26) when they block the drive means (23, 24). Device according to claim 20, characterized in that that the stop and release means comprise a surface of stop (33) arranged on the support (23) so as to be recalled in a position apart from the support and to approach the support during a support of the abutment surface (33) on a fixed counter-abutment (39), during the drive of the support, and a locking element (35) which is connected fixedly to the abutment surface (33), and which, in the position of reminder of this, locks the clamping handle and, when approximation between the abutment surface (33) and the support (23) under the effect of pressing on said counter-stop (39), unlocks the handle clamping (26) and releases the clamping elements (20, 21). Device according to any one of the claims 16 to 21, characterized in that the drive means are consisting of a pole which supports said first and second clamping elements (20, 21). Display panel (40) for implementing the process according to any one of claims 1 to 7, 10 to 13 and 15, characterized in that it is formed from fixed partial panels (43) arranged side by side and laying along each of their edges longitudinal said at least one retaining element (47-50). Display panel (40) for implementing the process according to any one of claims 1 to 6, 8, 10 to 13 and 15, characterized in that it is formed from a single stationary panel (42) and in that the stationary panel carries retaining elements above (49, 50, 55) which subdivide it into fixed partial panels (56).

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