BACKGROUND OF THE INVENTION Retail product display systems are already known. Some of them consist in a demonstration product track for receiving demonstration products, on one end of which is arranged a communication track for receiving labels. The demonstration product track is secured on a shelf by the opposite end. However, these retail product display systems have several drawbacks. A first drawback consists in the fact that neither the angle between the demonstration product track and the shelf nor the angle between the demonstration product track and the communication track are selectable. So, it is not possible to adapt the relative position of these parts of the retail product display system in order to optimize its ergonomy for consumers.

Such retail product display system are often used with an associated demonstration product locator consisting in a flat member exhibiting openings for receiving corresponding demonstration products, the demonstration product locator being placed in covering relationship with the demonstration product track. The demonstration product locator is usually maintained by sliding two opposite edges thereof into rails arranged on the demonstration product track. This system has several drawbacks. First, the rails, which may be unaesthetic, are partly visible to consumers. Secondly, the width of the demonstration product locator is limited to the distance between both rails and all members that may be arranged on the demonstration product locator, as, for example, a seat member for the pivot axle of a closing cover, are necessarily situated in the region which may be used for locating the demonstration products, thereby limiting the space available for the latter.

Another drawback consists in the fact that consumers in shops can release the demonstration product locator from the demonstration product track with relative ease, this possibility being obviously not desired.

For small or flat demonstration products, a demonstration product support is often added to the demonstration product locator which allows to position those products on a higher level instead of placing them directly onto the demonstration product track. So,

these demonstration products are at the same sight level for consumers as more bulky ones. A demonstration product support usually consists in a plate member with three folds which form four faces. One end face is used to secure it onto the plate member of the demonstration product locator while the other faces forms a repository for the demonstration products, said repository passing partly through an opening of the demonstration product locator. A drawback consists in the difficulty of producing demonstration product supports having three folds and the cost incurred.

Seat members are usually arranged on the outside of the demonstration product locator which may receive pivot axles of covers for closing openings locating demonstration products. A drawback consists in the fact that several seat members may be left free, i. e. without pivot axles of covers resulting in an unaesthetic effect since they are visible to consumers.

A further drawback consists in that all information about the demonstration products is contained on labels placed on the communication track. It is advantageous if labels could also be fitted at another location because it could make the information clearer for consumers. It would also allow to use one series of labels for data about the products that rarely changes, as for example, the name of the product and technical information about it and a second series of labels for data that changes from time to time, as for example, the price of the product.

Demonstration products for display on the retail product display system may be of variable size and shapes, and accordingly, several kinds of demonstration product locators may be needed. A drawback consists in that it is usually necessary to provide a separate mold for each kind of demonstration product locator, and as a result, increased cost linked to these moulds.

Furthermore, such retail product display system are often equipped with an illumination system, usually secured under the shelf support track in order to illuminate the demonstration products of a second retail product display system secured on an underlying shelf and the products on this shelf extending beyond this second retail product display system. The drawback consists then in the fact that the communication track of the second retail product display system is poorly illuminated, especially if the underlying shelf is larger than the first one, and hence, reading information on the labels on the communication track may be less easy and the shelves are less attractive. It even happens that the demonstration product track is badly illuminated so that colours of product packages are not appreciated by consumers. However, it is not possible to increase the light power since this would imply high temperatures of the products,

possibly degrading some of them and preventing customers from taking the hot products out from the shelf.

It is an aim of the present invention to alleviate, at least partly, the above mentioned drawbacks.

SUMMARY OF THE INVENTION The invention relates to a retail product display system, including a shelf support track, a demonstration product track and a communication track, said tracks being linked with each other through engagement means comprising bead members with ribs and matching means comprising channels and grooves, where said engagement means and matching means engage slidably, at selected angles, thereby preventing rotation thereof.

According to one embodiment, the retail product display system comprises a demonstration product locator according to any of claims 2 to 8.

According to another embodiment, the retail product display system comprises a lighting system according to any of claims 9 to 20.

According to other embodiments, the retail product display system comprises a communication track according to claim 21 or 22.

According to other embodiments, the retail product display system comprises a demonstration product track according to claim 23 or 24.

According to other embodiments, a lighting element of the retail product display system is supplied by a ballast according to claim 25 or 26.

BRIEF DESCRIPTION OF DRAWINGS A retail product display system embodying the invention will now be described, by way of a non-limiting example, with reference to the accompanying drawings, in which: -figure 1 is a schematic view showing a cross-section of an assembled retail product display system according to the invention; -figure 2 is an enlarged partial exploded view of the link between the shelf support track and the demonstration product track of the retail product display system shown in figure 1; -figure 3 is a schematic view of a demonstration product track similar to the one shown in figure 1, but modified for receiving a demonstration product locator such as the one shown in figure 4; -figure 4 is a schematic view showing a cross-section of a demonstration product locator adapted for being mounted on the demonstration product track of fig. 3;

-figure 5 is a schematic view showing a cross-section of a part of demonstration product locator according to another embodiment of the invention; -figure 6 is a schematic view showing a cross-section of a part cf a retail product display system having a demonstration product track with an associated demonstration product locator of fig. 5; -figure 7 is a schematic view showing a cross-section of a demonstration product locator 50 with an associated demonstration product support frame 51 according to another embodiment of the invention; -figure 8 is a schematic view showing a cross-section of a part of a demonstration product locator according to another embodiment of the invention; -figure 9 is a schematic view showing a cross-section of a part of a demonstration product locator according to another embodiment of the invention; -figure 10 is a schematic view showing in perspective a demonstration product locator according to another embodiment of the invention; -figure 11 is a schematic view showing a cross-section of a part of a retail product display system according to another embodiment of the invention and which comprises a lighting tube and a frosted glass screen; -figure 12 is a schematic view showing in perspective one end of a communication track on which is arranged an end cap used for securing the illumination system of fig.11; -figure 13 is a schematic view showing in perspective an end cap used for securing the illumination system of fig. 11 and the corresponding frosted glass screen; -figure 14 is a schematic view of a part of a frosted screen articulated on an end cap for communication track; -figure 15 is a schematic side view showing three shelves in superposed relationship, each having a retail product display system comprising an illumination system, secured on its edge, two illumination systems being according to the embodiments of fig. 11 to fig. 14 and one according to the prior art; -figure 16 is a schematic perspective view of a support for a neon tube and a frosted light diffusing screen according to another embodiment of the invention;- figure 17 is a schematic perspective view of an end cap adapted to secure the support of fig. 16 on a corresponding communication track; -figure 18 is a schematic side view of a frosted light diffusing screen according to another embodiment of the invention; -figure 19 is a schematic cross section of the frosted light diffusing screen of fig. 18 when mounted on a corresponding communication track;

-figure 20 is a schematic perspective view of a housing containing the ballast for the neon tube that equips the retail product display system.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 shows a cross-sectional view of an assembled retail product display system according to the invention.

The retail product display system comprises a shelf support track 1 adapted to be secured on a shelf, a demonstration product track 2 for receiving demonstration products and a communication track 3 for receiving labels. In this embodiment, the shelf support track 1, the demonstration product track 2 and the communication track 3 have each the same cross-section throughout their respective length, but this is not necessary.

The shelf support track 1 has a U-shaped cross-section defined by two substantially parallel leg members 5,6 and a bottom part 7. The shelf support track 1 may be secured at a corresponding edge 4 of a shelf by inserting said edge 4 between the leg members 5,6 till the bottom part 7 in a press-fit manner. Additionally or alternatively, the shelf may also be secured by means of screws or similar passing through one or both leg members 5,6 and pressing on, or eventually passing through the shelf.

On the side of the bottom part 7 opposite to the two leg members 5,6, the shelf support track 1 exhibits a longitudinal bead member 9 which comprises a rib 10 (best seen in fig. 2). Said bead member 9 is preferably, but not necessarily, placed coplanar with the upper leg member 5. Said bead member 9 is rigidly linked to the shelf support track 1 via an arm part 8 which may be omitted.

On the side of the bottom part 7 opposite to the two leg members 5,6, the shelf support track 1 also exhibits a wing member 11 linked to the underside of the arm part 8 and extending downwards away in a curved manner from said arm part 8 and from the bottom part 7. The wing member 11 may be directly linked to the bottom part 7 or to the leg members 5,6 instead of arm part 8. The free end part 12 of said wing member 11 is substantially flat and perpendicular to the leg members 5,6. Said wing member 11 is stiffened by an arm part 13 which links it to the bottom part 7, but such a stiffening may be omitted. Said wing member 11 may have any suitable form; in particular, it can be substantially planar. Said wing member 11 aims at abutting demonstration product track 2 at the end portion 12 as a shoulder, thus strengthening the retail product display system. However, the abutment of demonstration product track 2 on the wing member 12 may be omitted and hence, the wing member 11 may be omitted.

The demonstration product track 2 has a general section of an L having a first arm 14 substantially perpendicular to a second arm 15. The inner face of the first arm 14, i. e. the face on the side of the second arm 15 is referenced 14a and the outer face of said arm 14, i. e. the face on the opposite side relatively to the second arm 15 is referenced 14b. The inner face of the second arm 15, i. e. the face on the side of the first arm 14 is referenced 15a and the outer face of said arm 15, i. e. the face on the opposite side relatively to the first arm 14 is referenced 15b. A longitudinal channel 16 is arranged at the free end part of arm 14 on the outer side 14b. Said longitudinal channel 16 engages the bead member 9 of the shelf support track 1, as will be detailed later with reference to fig. 2. The face 14b may be in contact with the wing member 12. More precisely, the face 14b may abut the flat part end 12 of the wing member 11 of the shelf support track 1 with its end part opposite to the one carrying the channel 16. The inner face 15a of the second arm 15 is used as a shelf for receiving demonstration products (not shown) either directly or via a lining plate (not shown) adapted on the demonstration product track 2. Such a lining plate may be a L-shaped coloured plastic piece and arranged on both the inner face 15a and the inner face 14a of the demonstration product track 2 in a snap-in fashion. It is advantageous to use a lining plate for aesthetical reasons and eventually for adapting the position of the demonstration products.

The free end part of second arm 15 is slightly raised upwards; this upraisal may be omitted. A longitudinal bead member 19 is arranged at the raised free end part of second arm 15 via an arm portion 21 (which may be omitted).

Alternatively, the shape of the L-shaped link, constituted by the arms 14 and 15, between the channel 16 and the bead member 19 of the demonstration product track 2 may be modified, for example into a part of a circle.

The communication track 3 comprises a member 22 having a curved section having a convex face 22a and a concave face 22b. A longitudinal channel 25 is arranged on one end part of said member 22 on its concave face 22b. Said longitudinal channel 25 slidably engages the bead member 19 of the demonstration product track 2, as will be detailed later with reference to fig. 2.

A hook-shaped member 23,24 is arranged on each end part of said member 22 extending on the side of its convex face 22a. The concave part of both hook-shaped members 23,24 are turned one toward the other. Labels (not shown), for instance labels with product information for clients, of a suitable height may be slid longitudinally on the convex face 22a and maintained by both hook-shaped members 23,24. If they are sufficiently flexible, it is possible to insert said labels facially by squeezing them.

Of course, it is possible to vary the shape of the member 22 (a planar section would be suitable too) as well as to locate the channel 25 on another part of the member 22.

The shelf support track 1, demonstration product track 2 and communication track 3 may be made, for example, from aluminium material and coated with a lacquer.

End caps (not shown) may be arranged on each extremity of shelf support track 1, demonstration product track 2 and communication track 3. In particular, once the retail product display system is assembled, an end cap may be arranged on each extremity of demonstration product track 2 in, for example, a press-fit manner which covers channel 16 and channel 25 in order to stop the possible longitudinal sliding movement of demonstration product track 2 relative to shelf support track 1 and of communication track 3 relative to demonstration product track 3: for that purpose, it is advantageous for shelf support track 1, demonstration product track 2 and communication track 3 to have the same length. These possible longitudinal sliding movements may also be stopped by other means as, for example, by screws arranged through the wall of the channel 16, respectively 25 and pressing on the bead members 9, respectively 19 or with circlips or the like arranged at both extremities of each bead member 9,19 on which the channel wall extremities may abut.

With reference to fig. 2 showing an enlarged partial exploded view of the link between the shelf support track 1 and the demonstration product track 2, we will now describe in more detail the way the longitudinal bead member 9 engages the longitudinal channel 16.

The longitudinal bead member 9 of the shelf support track 1 has a circular section and exhibits a longitudinal rib 10 of semi-circular section extending in a direction substantially opposite to the leg members 5,6 (but this position of the rib may be varied).

The longitudinal channel 16 of the demonstration product track 2 has a circular shape and is open on a 90° large part 18 on the side opposite to the outer face 14a of the first arm 14. However, said 90° angle of the open part 18 may be varied with an upper limit approaching 180° as it will result from the following. Four adjacent longitudinal grooves 17a, 17b, 17c, 17d having each a semi-circular section are arranged in a part of said channel 16 at the opposite side of its open part 18. The bead member 9 of the shelf support track 1 and its rib 10 are scaled for slidably engaging said channel 16 and its grooves 17a, 17b, 17c, 17d. The assembly of the demonstration product track with the shelf support track is possible by longitudinally sliding the bead member 9 of the shelf support track into the channel 16 of the demonstration product track 2 while the rib 10

engages one of grooves 17a, 17b, 17c, 17d and the arm part 8 passes through the open part 18. Obviously, the passage in open part 18 of channel 16 is larger than the thickness of the arm part 8 linking the bead member 9 to the shelf support track 1 in order to allow said arm part 8 to extend through said open part 18 when the bead member 9 is positioned into the channel 16. However, it is not possible to insert the bead member 9 into the channel 16 through the open part 18 because the passage of the open part 18 is smaller than the diameter of said bead member 9. For the same reason, once the bead member 9 is engaged into the channel 16, it is not possible for the bead member 9 to leave the channel 16 through the open part 18. However, facial inserting of the bead member 9 into the channel 16 would be possible by having a part of the wall of the channel 16 removable for enlarging the open part 18; said removable part could be secured, for instance, by means of screws. It is not possible for the bead member 9 to rotate in the channel 16 because the rib 10 engages one of the grooves 17a, 17b, 17c, 17d. The angle between the demonstration product track 2 and the shelf support track 1 can be selected by the user when mounting them together by engaging the rib 10 into a preferred one out of the four grooves 17a, 17b, 17c, 17d, each groove corresponding to another angle. In this embodiment, groove 17a allows to assemble the demonstration product track 2 on shelf support track 1 in such a way that the arm 15 of the demonstration product track 2 is parallel to the leg members 5,6 of the shelf support track 1. The three other grooves 17a, 17b, 17c allow to position the arm 15 at three different raised positions. However, in most cases, it is preferred to use the parallel position of arm 15 to leg members 5,6 provided by groove 17a; this is why the link constituted by the engagement of the bead member 9 in the channel 16 for the groove 17a position has been advantageously reinforced with arm 14 resting on the wing member 11 of the shelf support track 1, as depicted in fig. l.

Alternately, it is possible to vary the number of grooves 17 in order to obtain more or less selectable positions of the demonstration product track 2 relatively to the shelf support track 1. It is also possible to arrange several ribs 10 on the bead member 9 so that each cooperates with a respective groove 17 of channel 16, in order to strengthen the connection between the shelf support track 1 and the demonstration product track 2.

The semi-circular shape of the rib 10 and of the corresponding grooves 17 may also be varied. Furthermore, it is also possible to change the general shape of bead member 9 and correspondingly the shape of channel 16 so long as their shape allows to engage slidably, but not rotatably, the bead member 9 with the channel 16.

Of course, it is also possible to have the bead member 9 arranged on the demonstration product track 2 and the channel 16 arranged on the shelf support track 1.

The link of communication track 3 with demonstration product track 2 by engagement of the bead member 19 and its rib 20 with the channel 25 and its grooves 26a, 26b, 26c, 26d, 26e i similar to the link described up-to-now of demonstration product track 2 with shelf support track 1 by engagement of the bead member 9 and its rib 10 with the channel 16 and its grooves 17a, 17b, 17c, 17d. As a consequence, everything said herein about shapes, mounting method and alternative embodiments made regarding the link between demonstration product track 2 and shelf support track 1 applies also to the link between communication track 3 and demonstration product track 2, and will not be repeated here. However, if the link between communication track 3 and demonstration product track 2 is similar, it does not need to be identical with the link between demonstration product track 2 and shelf support track 1. For instance, the number of grooves in the channel 25 shown in fig. l is five (26a, 26b, 26c, 26d, 26e) instead of four (17a, 17b, 17c, 17d) for channel 16. However, apart from the number of grooves, it is advantageous to have identical dimensions for both links, so it is possible to omit the demonstration product track 2 for directly mounting communication track 3 on shelf support track 1 by engaging bead member 9 into channel 25.

With reference to fig. 3, we will now describe another embodiment of the demonstration product track 40 which is adapted for receiving a locator, especially a demonstration product locator 27 described in relation with fig. 4. The demonstration product track 40 is identical to the demonstration product track 2 described in relation with fig. 1, except that means for receiving a locator have been added. So, demonstration product track 40 is adapted for being assembled with shelf support track 1 and communication track 3 described in relation with fig. l. All references used on demonstration product track 2 are also used for demonstration product track 40 and correspond to the same parts.

The means added to demonstration product track 2 for obtaining demonstration product track 40 will now be described. A first longitudinal U-shaped member 41 is arranged on the free end part of the first arm 14 on the inner face 14a. Said first U-shaped member 41 is defined by two substantially parallel leg members 42,43 and a bottom part 44. A second longitudinal U-shaped member 45 is arranged on the raised free end part of the second arm 15 on the inner face 15a. Said second U-shaped member 45 is defined by two substantially parallel leg members 46,47 and a bottom part 48. Both U-shaped members 41,45 are arranged so that the open part of each are substantially facing each other. A demonstration product locator 27, not shown, including a plate may be inserted into the demonstration product track 40. The dimensions of the plate are such that the width allows the plate to be inserted between the U-shaped members 41,45. The plate

is first slidably inserted into U-shaped member 41, resting on the leg member 43. Then, the plate is caused to rest on leg member 47, and then slides down to bottom 48. Once mounted, the edges of the plate will abut on the leg members 46, respectively 42 if the plate is pulled in outside direction as the width of the plate is larger than the distance from bottom 48 to free end of leg member 41. As shown, leg member 42 is longer than leg member 46 while leg member 43, respectively 47 is preferably longer than leg member 42, respectively 46.

With reference to fig. 4, we will now describe a demonstration product locator 27 which may be associated to a demonstration product track 40 of fig. 3. The function of demonstration product locator 27 is to locate demonstration products on a demonstration product track 40. For that purpose, the demonstration product locator 27 is associated to the retail product display system in a covering relationship with demonstration product track 40 so that, when demonstration products are placed on the demonstration product track 40, said demonstration products may either extend or be reached with the fingers of the hand through openings made correspondingly in said demonstration product locator 27. Accordingly, demonstration product locator 27 comprises a plate member 28 which is shown flat, but may have various other shapes as, for example, curved. Openings 29 (only one can be seen) corresponding to the shape of the demonstration products are cut-out in the middle part of said plate member 28.

A first longitudinal L-shaped member 30 is arranged on a first lateral region of said plate member 28. Said first L-shaped member 30 comprises a base part 31 extending substantially perpendicularly (but not necessarily) to the connecting face of said plate member 28. spaced from the plate member 28, preferably at the free end of said base part 31, a guide part 32 extends substantially parallel (but not necessarily) to the plate member 28 in the outward direction of said plate member 28.

A second longitudinal L-shaped member 35 is arranged on the same face of the plate member 28 as the first L-shaped member 32, but in the lateral region opposite to the one of the first L-shaped member 30. Said second L-shaped member 35 comprises a base part 36 extending substantially perpendicularly (but not necessarily) to the connecting face of said plate member 28. Spaced from the plate member 28, a guide part 37 extends from said base part 36 substantially parallel (but not necessarily) to the plate member 28 in the outward direction of said plate member 28. Base part 36 may extend beyond the guide part 37 as a triangle-shaped part 38 for cooperating with the leg member 47 of demonstration product track 40. This part 38 may be omitted.

Both longitudinal L-shaped members 30,35 may be realised either continuously or in an interrupted manner on the whole length of the demonstration product locator 27.

The demonstration product locator 27 can be obtained by injection moulding of plastic, or eventually by extrusion followed by cutting-out of the openings 29.

The dimensions of the first U-shaped member 41 are adapted so that the guide part 32 of the first L-shaped member 30 of the demonstration product locator 27 may engage it.

The dimensions of said second U-shaped member 45 are adapted so that the guide part 37 of the second L-shaped member 35 of the demonstration product locator 27 may engage it. The shape of the lower leg member 47 is the inverse of the triangle part 38 of the guide part 37 so to make possible the resting of the latter over its whole length on the leg member 47 when assembled. The two U-shaped members 41,45 are spaced so as to allow both the engagement of the first L-shaped member 30 into the first U-shaped member 41 and the engagement of the second L-shaped member 35 into the second U- shaped member 45.

Mounting may be done by longitudinally sliding the demonstration product locator 27 onto the demonstration product track 40 while realising both engagements. However, this embodiment allows also to mount the demonstration product locator 27 in a facial way onto the demonstration product track 40 in the following way. The distance between the free end of the upper leg member 42 and the upper leg member 46 of the second U-shaped member 45 is smaller than the distance between the free end of the guide part 32 of the first L-shaped member 30 and the free end of the guide part 37 of the second L-shaped member 35. As a consequence, it is not possible to realise both engagements (and disengagements) at the same time by facial mounting. However, it is possible to select dimensions for the elements so that the facial mounting becomes possible in three steps. This mounting is similar to the mounting of the plate described in relation with fig. 3. The first step consists in engaging the first L-shaped member 30 into the first U-shaped member 41, more particularly, by engaging guide part 32 between the two leg members 42,43 substantially till abutment with the bottom part 44.

The second step consists in lowering the guide part 37 of the second L-shaped member 35 from the outside onto the bottom leg 47 of the second U-shaped member 45 by passing the free end of the guide part 37 in front of the free end of the upper leg member 46 of the second U-shaped member 45. The abutment of the guide part 37 and its triangle-shaped part 38 onto the leg member 47 is facilitated due to the fact that leg member 47 is longer than leg member 46. The distance between the free end of the upper leg member 46 of the second U-shaped member 45 and the bottom part 44 of the first U-shaped member 41 (i. e. the abutment surface, in first and second step of

mounting, of the demonstration product track 40 with the demonstration product locator 27) is at least equal to the distance between the free end of the guide part 37 of the second L-shaped member 35 and the free end of the guide part 32 of the first L-shaped member 30 (i. e. the abutment surface, in first and second step of mounting, of the demonstration product locator 27 with the demonstration product track 40). However, it is preferred that the distance between the free end of the upper leg member 46 and the bottom part 44 be very slightly smaller than the distance between the free end of guide parts 32 and 37: this allows an insertion by using the resilient characteristics of the materials of the demonstration product locator 27 and demonstration product track 40 (the resilient characteristics are than providing advantageously a supplementary security for avoiding accidental disassembling of the demonstration product locator 27 from the demonstration product track 40). The third step consists in sliding the guide part 37 of the second L-shaped member 35 between the leg members 46,47 of the second U- shaped member 45 till abutment of the free end of guide part 37 with the bottom part 48 and/or covering of the shape of leg member 47 by the matching shape of the guide part 37 and the triangle-shaped part 38. In fact, the sliding in the third step is done automatically due to the weight force of the demonstration product locator 27. Insertion is facilitated by the triangle-shaped part 38 gliding on upper leg member 46.

Once assembled as mentioned, it is not possible to remove facially the demonstration product locator 27 by simply pulling it because of the guide parts 32,37 abutting against the outer leg members 42,46. More particularly, the distance between the free end of guide part 32 and the free end of guide part 37 (i. e. the abutment surface, when assembled, of the demonstration product locator 27 with the demonstration product track 40 on the side of the second U-shaped member 45) is greater than the distance between free end of leg member 42 and the bottom part 48 (i. e. the abutment surface, when assembled, of the demonstration product track 40 with the demonstration product locator 27 on the side of the second U-shaped member 45).

The demonstration product locator 27 may be removed facially by firstly sliding demonstration product locator 27 towards the first U-shaped member 41 so that the guide part 32 of the first L-shaped member 30 abuts on the bottom part 44 of the first U- shaped member. Secondly, the guide part 37 of the second L-shaped member 35 is pulled up from the bottom leg member 47 of the second U-shaped member 45 out of the region of the second U-shaped member 45 by passing the free end of the guide part 37 in front of the free end of the upper leg member 46 of the second U-shaped member 45.

The last step consists in sliding the demonstration product locator 27 so as to disengage the guide part 32 from the first U-shaped member 41.

It is of course possible to vary the shape and dimensions of the L-shaped members 30, 35 and of the U-shaped members 41,45 as long as they are adapted to cooperate.

Further, the manner of cooperating of the L-shaped members 30,35 with the U-shaped members 41,45 may be varied by changing the dimensions of these organs. For example, during first and secons step of mounting, it has been described that the free end of guide part 32 of first L-shaped member 32 substantially abuts the bottom part 44 of first U-shaped member 41; instead, it is possible to change dimensions so it is the free end of leg member 42 that abuts base part 36. Another example is, when demonstration product locator 27 is mounted on demonstration product track 40, it has been described that the free end of guide part 37 abuts bottom part 48 and/or guide part 37 with triangle-shaped part 38 cover matching shape of leg member 47; instead, it is possible to change dimensions so it is the free end of leg member 46 that abuts base part 36. A further example is that, once mounted, the demonstration product locator 27 rests on the demonstration product track 40 by abutment of the guide parts 32,37 on respectively the leg members 43,47; instead, it is possible to change dimensions so that it is plate member 28 that abuts on the outward face of leg members 42,46. As a result, leg members 43,47 may then be omitted: the L-shaped members 30,35 are completed by the plate member 28 so as to define U-shaped members which are engaged by leg members 42,46. This illustrates the general possibility to have the longitudinal U- shaped members 41,45 on the demonstration product locator 27 which cooperate with longitudinal L-shaped members arranged on the demonstration product track 40 instead of the inverse.

Alternately, it is also possible to reverse the orientation of the U-shaped members 41,45 by making their open part facing away from each other and, hence, to reverse the orientation of the L-shaped members 30,35 by making the free ends of their guide parts 32,37 face each other.

The embodiment described in relation with fig. 4 has several advantages compared to the previously existing systems. First, the rails (i. e. the U-shaped members 41,45), which may be unaesthetic, are no more visible to consumers. Secondly, the width of the demonstration product locator 27 is no more limited to the distance between both rails.

So, all members that may be arranged on the demonstration product locator 27, as, for example, a seat member for the pivot axle of a closing cover, may be situated out of the region in which openings may be arranged for locating demonstration products.

Furthermore, the location for demonstration products on the demonstration product locator may consist in a recess arranged on the plate member 28 extending over the U- shaped members 41,45, thereby allowing the placement of demonstration products

larger than the distance between said two U-shaped members 41,45. It is particularly preferred to use a plate member 28 with appropriate thickness, i. e. a sufficiently large thickness so to allow said recess to have significant depth for providing good positioning of demonstration products.

With reference to fig. 5, we will now describe another embodiment of the demonstration product locator according to the invention. The demonstration product locator, now referenced 49, is identical, in particular as regards shapes and dimensions, to the demonstration product locator described in relation with fig. 4, except for the guide part 32 of first L-shaped member 30. The demonstration product locator 49 shown in fig. 5 comprises a modified guide part now referenced 33.

At the free end of base part 31, a guide part 33 extends parallel to the plate member 28 in the outward direction of said plate member 28. The thickness in the direction of the free end of the guide part 33 diminishes abruptly by forming a face 34a substantially perpendicular to the guide part 33 so as to form a step-shaped guide part 34, said step- shaped part 34 being realised on the side of the guide part 33 facing away from the plate member 28. The total length of the guide part 33, including the step-shaped part 34, is identical to the length of the guide part 32 in the embodiment of fig. 4. The thickness of the guide part 33 before its step-shaped part 34 is identical to the thickness of the guide part 32 in the embodiment of fig. 4.

The way of mounting the demonstration product locator 49 onto demonstration product track 40 is similar to the way described in reference with fig. 3 and 4, the reference to the guide part 32 being replaced with the reference to the guide part 33, including its step-shaped part 34.

However, once mounting is finished, since the length of the step-shaped part 34 is so selected, the first L-shaped member 30 rests on the bottom leg member 43 with exclusively the step-shaped part 34 and face 34a is adjacent to the free end of inner leg member 43.

As a consequence, this embodiment has the advantage of diminishing the transversal floating of the demonstration product locator 49 in the demonstration product track 40.

This transversal floating, in embodiment of fig. 4, is due to the fact that the distance between the free end of the guide parts 32,37 of the L-shaped members 30,35 is smaller than the distance between the bottom parts 44,48 of the U-shaped members 41, 45 as it results from the description of said embodiment. The embodiment of fig. 5 diminishes greatly this transversal floating because, if an effort to slide the demonstration product locator 49 in the direction of the first U-shaped member 41

occurs, the face 34a of the guide part 33 will abut on the free end of the inner leg member 43 and so limit the movement.

On the other hand, the facial disassembling of the demonstration product locator 49 from demonstration product track 40 is more complicated compared to the embodiment of fig. 4. The first step consists in pulling demonstration product locator 49 so that guide part 33 of the first L-shaped member 30 abuts the upper leg member 42 of the first U- shaped member 41. At this moment, face 34a of guide part 33 does no longer abut on the free end of the inner leg member 43. So, it becomes possible to slide demonstration product locator 49 towards the first U-shaped member 41 so that the guide part 33 via its step-shaped part 34 abuts on the bottom part 44 of the first U-shaped member 41. From this moment on, the disassembling is continued in the same manner as for the embodiment of fig. 4. As seen, the facial disassembling of demonstration product locator 49 from demonstration product track 40 is more complicated compared to the embodiment of fig. 4; this is an advantage as it further diminishes the risk of undesired removal of the demonstration product locator 49 from the demonstration product track 40 by consumers in a shop.

Fig. 6 is a schematic view showing a cross-section of a part of a retail product display system having a demonstration product track 40 with an associated demonstration product locator 49 of the type described in fig. 5.

With reference to fig. 7, we will now describe another embodiment of the invention comprising a demonstration product locator 50. The demonstration product locator 50 is identical, in particular as regards shapes and dimensions, to demonstration product locator 49 described in relation with fig. 5, except for the base part 31 of the first L- shaped member 30. The modification may also be done on the demonstration product locator 27 of the embodiment of fig. 4. As a consequence, the demonstration product locator 50 may be used on the same retail product display system as the demonstration product locator 49, in particular, demonstration product locator 50 may be mounted on the demonstration product track 40 described in relation with fig. 3. All references used for describing demonstration product locator 49 are also used for demonstration product track 50 and correspond to the same parts. For demonstration product locator 50, we will only describe here the modified base part 31 of demonstration product locator 49 which is longer and comprises an extended part 52 (but the guide part 33 is arranged at the same distance relatively to the plate member 28).

A demonstration product support 51 is arranged with a first wall 53 onto the base part 31 of the first L-shaped member on the side opposite to the guide part 33. Due to the

increased length of the base part 31 up to the extended part 52, an efficient securing, by means of glue or screws or similar, of wall 53 of the demonstration product support 51 onto the base part 52 becomes possible. Of course, the length of base part 31 may not be increased if it offers sufficient surface for allowing an efficient securing of wall 53. The demonstration product support 51 is constituted by a plate member presenting two folds forming two opposite walls 53,55 linked by a bottom wall 54. Once the demonstration product support 51 is associated onto demonstration product locator 50, demonstration product support 51 extends partly through a corresponding opening 29 of demonstration product locator 50. A longitudinal notch 54a may be arranged on the bottom wall 54 of the demonstration product support 51, said notch 54a cooperating with the edge of the opening 29 laying opposite to the first L-shaped member 30 in order to improve the securing of the demonstration product support 51 on the demonstration product locator 28. Once the retail product display system, obtained by assembling demonstration product locator 50 equipped with demonstration product support 51, with the shelf support track 1 and the communication track 3, is secured onto an edge 4 of a shelf, and by selecting an appropriate angle between demonstration product track 40 and shelf support track 1, the bottom wall 54 may be substantially horizontal so that demonstration products may be placed on it.

The length of the demonstration product support 51 and of the corresponding opening 29 can be variable. It is of course possible to arrange several demonstration product supports 51 through several corresponding openings 29 arranged longitudinally onto demonstration product locator 50 in spaced relationship.

It is less advantageous to secure a demonstration product support directly onto the plate member 28 of the demonstration product locator 50 because the shape of the demonstration product support has to be adapted and will be more complex, in particular, it will need an additional fold for obtaining an additional wall which will be associated onto the plate member 28. Thus, the described embodiment provides an improvement over the prior art since only two folds are needed.

With reference to fig. 8, we will now describe another embodiment of the invention comprising a demonstration product locator 57. The demonstration product locator 57 is identical, in particular as regards shapes and dimensions, to demonstration product locator 27 described in relation with fig. 4, except for the free end part of the plate member 28 on the side of the first L-shaped member 30. The modification may also be done on all other described embodiments of the demonstration product locator, in particular demonstration product locator 49 of fig. 5 or demonstration product locator 50

of fig. 7. As a consequence, the demonstration product locator 57 may be used on the same retail product display system as the demonstration product locator 27, in particular, demonstration product locator 5 () may be mounted on the demonstration product track 40 described in relation with fig. 3. Unchanged references used in relation with fig. 8 designate the same parts as referred to in previous figures. For demonstration product locator 57, we will only describe here the modified end part of the plate member 28 of demonstration product locator 27 for obtaining demonstration product locator 57.

A rectangular recess 64 is arranged on the end part of the plate member 28 on the side of and on the same face that the first L-shaped member 30. Two opposite face of said recess extend longitudinally. The recess may have another shape, for example, a circle.

A hole of preferentially square section arranged in the middle part of said recess 64, passes through the plate member 28 in a substantially perpendicular manner relatively to its faces. The hole may be obtained by punching-out or by means of laser cutting.

Two opposite walls of said hole 65 extend longitudinally. A seat member 56 (or bridge member) is arranged in hole 65 and recess 64. The seat member 56 comprises two leg members 58,60 facing each other in spaced relationship and which are linked at one end thereof by an annular part 62. Foot members 59,61 are arranged on the opposite end of each of said leg members 58,60, said foot members 59,61 facing away from each other. The seat member 56 is made of plastic for instance and the leg members are resilient. The seat member 56 is engaged through the hole 65 by pinching together both leg members 58,60 and inserting them through the hole 65 until both foot members 59, 61 extend into the recess 64. At this moment, by releasing them, each leg member 58, 60 presses against a respective side of the hole 65 for firmly maintaining the seat member 56 onto the plate member 28. On the other hand, the foot members 59,61 engage with the bottom of the recess 64 in order to prevent said seat member from sliding out of the hole 65. The height of said foot members 59,61 is smaller than or equal to the depth of said recess 64, to prevent them from extending outside the plate member 28. This will allow placing seat members 56 at an upper location of the plate member 28, thus extending the space dedicated to product demonstration. On the other side of the plate member 28, each leg member 58,60 exhibits, on its external face, a shoulder 66,67 abutting said plate member 28 so as to prevent the seat member 56 from sliding through the hole 65 in the direction of the recess 64. Hence, the foot members 59,61 will not extend outside of plate member 28 and so, said foot members 59,61 may not obstruct the mounting of the demonstration product locator 57 onto the demonstration product track 40 because of contacting parts of said demonstration

product track, in particular the first U-shaped member 41. Shoulders 66,67 may be avoided if foot members 59,61 abut on e. g. the U-shaped member 41. The hollow 63 defined by the internal face of the annular part 62 is substantially circular and its axis is longitudinal. A second seat member 62 (not shown) is arranged on the plate member 28 by engagement through a second hole 65 and recess 64 (not shown) in longitudinal spaced relationship with the first seat member 56, but the axis of the hollows 63 being identical. Hence, it is possible to arrange a pivot axle (not shown) through said hollows 63 on which may be articulated a cover (not shown) the purpose of which is to close a corresponding opening 29 of the plate member 28. The rotation of said cover may be limited by an external shoulder 71 arranged on the top of the annular part 62. Such an articulated cover is particularly advantageous when the demonstration product accessible through said opening 29 consists in a powder because the powder is protected against draughts. In a preferred embodiment, several recesses 64 are arranged in a longitudinal direction and in spaced relationship on the demonstration product locator 57 which define as many possible locations for seat members 56. According to the need of seat members 56 depending on the use of the demonstration product locator, through holes 65 will subsequently be formed at only certain of said recesses 64.

In the past, the seat members were moulded in one piece with the demonstration product track with the aesthetical drawback of exhibiting possibly unused seat members when no articulated cover is desired. This embodiment alleviates this drawback by leaving the choice to the user whether or not to associate seat members onto the demonstration product track.

With reference to fig. 9, we will now describe another embodiment of the invention comprising a demonstration product locator 68. The demonstration product locator 68 is identical, in particular as regards shapes and dimensions, to demonstration product locator 27 described in relation with fig. 3, except for the free end part of the plate member 28 on the side of the first L-shaped member 30. The modification may also be done on all other described embodiments of the demonstration product locator, in particular demonstration product locator 49 of fig. 5, demonstration product locator 50 of fig. 7 and demonstration product locator 57 of fig. 8. As a consequence, the demonstration product locator 68 may be used on the same retail product display system as the demonstration product locator 27, in particular, demonstration product locator 68 may be mounted on the demonstration product track 40 described in relation with fig. 4.

Unchanged references used in relation with fig. 9 designate the same parts as referred to in previous figures. For demonstration product locator 68, we will only describe here

the modified end part of the plate member 28 of demonstration product locator 27 for obtaining demonstration product locator 68.

A longitudinal notch 69 is arranged in the end part of the plate member 28 corresponding to the first L-shaped member 30 and situated on the face opposite to the latter. The notch 69 has a V-shaped section defined by two walls 74,75 linked by a restrained bottom part. The wall 74, which is the nearest to the end of the plate member 28, is inclined towards the nearest end of plate member 28 from the bottom part on. The other wall 75 is substantially perpendicular to the main faces of the plate member 28.

The end 78 of the plate member 28 near the notch 69 is slightly curved and meets the face of the plate member 28 opposite of the one having the notch 69 with another notch 70. A label support 79 is arranged onto said end 78. Said label support 79 is defined by two leg members 72,73 facing each other and linked by a rounded part on one of their respective ends. Said label support 79 is made of, e. g. transparent resilient plastic. Its two leg members resiliently press against one another. First leg member 72 is substantially straight. Said second leg member 73 is defined by a first part 76 which is linked at one end to the first leg member via the rounded part. Said first part 76 joins a second part 77, the shape of which is the inverse of the shape of the end 78, notch 70 included, of the plate member 28.

The label support 79 is mounted onto the end 78 of the plate member 28 by snapping the first leg member 72 into the notch 69 and the second part 77 of the second leg member 73 around the end 78 so that the free end of said second part 77 engages the notch 70. The first leg member 72 will rest along the inclined wall 74. The space between said first leg member 72 and the first part 76 of said second leg member 73 may receive a corresponding label. The label may be inserted longitudinally or by slightly separating the two leg members 72,73 and passing it between the latter (before mounting it on the plate member 28, in the latter case). When mounted onto demonstration product locator 68, the label support 79 extends upwardly with respect to the latter so that consumers may read the labels when the retail product display system, including said demonstration product locator 68, is secured on a shelf edge 4. Of course, the shapes of the label support 79 as well as the end 78 of the demonstration product locator 68 may be varied.

This embodiment is advantageous because it allows to fit labels on another location of the retail product display system than its communication track; this possibility did not exist in the past. So, it makes information clearer for consumers. In particular, it allows to use one series of labels for unvarying data about the products, as for example, the name of the product and technical information about it, which will be placed on the

communication track 3 and a second series of labels for data that changes more often in time, as for example, the price of the product, which will be placed on label supports 79.

With reference to fig. 10, we will now describe another embodiment of the invention comprising a demonstration product locator 80 which is similar to any one of the embodiments described up-to-now. References of previous figures are still used for referencing identical parts. Demonstration product locator 80 comprises a flat shaped member 28 and a first longitudinal L-shaped member 30 with three interruptions so that it defines four longitudinal L-shaped parts 30a, 30b, 30c, 30d. Demonstration product locator 80 comprises two seat members on each extremity, moulded in one piece with the plate member 28. Demonstration product locator 80 further comprises three recesses 64a, 64b, 64c for optionnaly receiving additional seat members 56 (not shown). Each recess 64a, 64b, 64c is preferably arranged (partly) between two consecutive L-shaped parts, respectively 30a, 30b; 30b, 30c; 30c, 30d. Said additional seat members 56 have, when mounted, the same axis as the seat members 55a and 55b in order to be used together for receiving a pivot axle on which a cover is articulated (not shown).

The distance between the extremity of the plate member 28 at the side of seat member 55a and a location between the second L-shaped part 30b and the first recess 64a corresponds to one of what will be called a"Ple unit" (one Pie unit is equal to about 78 mm); a small transversal groove 81a may be present at this location. The distance between said location identified by the small groove 81a and a location between the third L-shaped part 30c and the second recess 64b corresponds to a half Pie unit and is identified here by a small transversal groove 81b. Similarly, the distance between said location identified by the small groove 81b and the location identified by the small groove 81c corresponds a half Pie unit. The distance between said location identified by the small groove 81c and the extremity of the plate member 28 at the side of seat member 55b corresponds to a half Pie unit.

According to the size of the demonstration products to locate as well as the length of the associated demonstration product track, the demonstration product locator 80 may be cut into sub-elements of selected length. The first possibility is to cut the demonstration product locator 80 transversely at the level of the first groove 81a. As a result, the demonstration product locator 80 has then a length of one Pie unit comprising the first seat member 55a and the first recess 64a adapted to receive a removable seat member 56, and hence, it is possible to fit the pivot axle of a cover on them. The second possibility is to cut the demonstration product locator 80 transversely at the level of the second groove 81b. As a result, the demonstration product locator 80 has then a length

of 1,5 Pie unit comprising the first seat member 55a and the second recess 64b adapted to receive a removable seat member 56 and hence, it is possible to fit the pivot axle of a cover (which my be larger as in the first variant) on them. In the same way, it is possible to transversely cut the plate member 28 according to third groove 81c for obtaining a 2 Pie units long demonstration product locators. The remaining parts, after cutting, may also be used as demonstration product locator. The cutting out may be done, for example, by means of a cutting disc or a laser beam. The fact that the first L- shaped member 53 is interrupted at each end of full Pie and half Pie parts facilitates the cutting. Of course, demonstration product locator 80 may be used with its full length without cutting it into sub-elements. Alternately, it is also possible to omit seat members 55a and 55b and replace them with recesses 64 adapted to receive removable seat members 56.

Several sub-elements of demonstration product locator 80 or several entire demonstration product locator 80 may be mounted adjacent on a same demonstration product track 40 according to the wish of the user.

The length of the small grooves 81 a, 81b, 81 c may be limited or, on the contrary, extend over substantially the whole width of the demonstration product locator. In the latter case, said grooves may also be deep enough to obtain a divisible demonstration product locator. Of course, other kind of marks may be used. Said grooves may also be absent.

It is of course possible to select another number of sub-elements composing the demonstration product locator 80 instead of the four described.

The advantage of the embodiment described in relation with fig. 10 is to limit down to one the number of molds necessary to produce demonstration product locators of different lengthes in a simple manner.

With reference to fig. l l, we will now describe another embodiment of the invention.

Fig. 11 shows a cross-section of a part of a retail product display system comprising a lighting tube 91, for example, of the neon type, and its support 90 as well as a glass screen 86, preferably a frosted glass screen. The retail product display system is similar to any one of those described up-to-now; in particular, fig. 11 shows a demonstration product track 40 of fig. 3 and a communication track 3 of fig. l. The lighting tube 91 extends longitudinaly on the concave side of the communication track 3. The ligthing tube 91 is held by an associated longitudinal support 90 held on communication track 3.

The lighting tube 91 and its support 91 may be a standard type available in the trade and their length is preferably a bit shorter than communication track 3. Said support 90 is secured onto communication track 3 by various means, such as via end caps, as it will

be described in relation with fig. 12. The glass screen extends from the end region of the communication track 3 (near the hook-shaped member 23) to the demonstration product track 40. It can extend over substantially the whole width of said demonstration product track 40 or only a part thereof, as shown. A longitudinal hinge member 84 made, for example, of plastic, is arranged on the bottom end of communication track 3 by means, for example, of glue. Said hinge member 84 exhibits a channel 85 which is open in a direction substantially perpendicular to the concave face 22b or eventually in an upward direction. Said hinge member 84 engages with a longitudinal frosted glass screen 86 which diffuses the light of the lighting tube 91. The lighting tube 91 and its support 90 are located between the communication track 3 and the frosted glass screen 86. Said frosted glass screen 86 has a curved cross-section. One or several springs 89 are secured by one end onto the upper end part 87 region of frosted glass screen 86, on its concave face. The opposite end 88 of frosted glass screen 86 is shaped so that it may fit in the channel 85 of the hinge member 84 arranged on communication track 3. The other end of spring 89 is secured on communication track 3 near the region of its channel 25. The spring 89 maintains the frosted glass screen 86 in its engagement position in channel 85 and causes the end 87 of said frosted glass screen to abut on second arm 15 of the demonstration product track 40.

Alternately, the rotatable engagement of the hinge member with the end 88 of the frosted glass screen may be obtained with various other means. The hinge member 84 may also be obtained in one piece with communication track 3.

The ballast (not shown) of the lighting tube 91 is preferably not secured onto communication track 3 because it is usually relatively voluminous. Said ballast may advantageously be fitted under the shelf support track of the corresponding retail product display system or on some appropriate location under the shelf on which the latter is secured.

Fig. 12 shows one extremity of the communication track 3 of fig. 11. An end cap 82 made, for example, of plastic or aluminium, is arranged on the extremity of communication track 3. The end cap is secured on communication track 3 in a press-fit manner by pinching resiliently the extremity of communication track 3 between a tab 83 on the concave face 22b of communication track 3 and one other tab part (not shown) on the convex face 22a of communication track 3. A second end cap of the 82 type, but symetrical, is engaged on the opposite extremity of communication track 3. The tab 83 of both end caps 82 are used to secure, by means of glue, screws or similar, the support

90 (not shown) and its lighting tube 91. The support 90 may also simply be maintained in press-fit manner between communication track 3 and tab 83.

With reference to fig. 13, we will now describe a prefered embodiment of the invention similar to the one shown in fig. I I and fig. 12. Fig. 13 shows one extremity of the communication track 3 of fig. l. For sake of clarity, the channel 25 has not been represented (it would be on the upper part of communication track 3 as shown in fig. 12). An end cap 96a is arranged on the extremity of the communication track 3.

Another end cap 96b (not shown), similar but symetrical, is arranged on the other extremity of the communication track 3. The comments will be limited to the side of end cap 96 as the comments for the side of the opposite end cap are identical.

The end caps 96a, 96b are used for securing the longitudinal support 90 (not shown, see fig. 11) for the lighting tube 91 and the frosted screen 107. In this embodiment, no hinge member (as hinge member 84 of fig. 11) has to be arranged directly on communication track 3.

The end cap 96a is secured on communication track 3 in a press-fit manner by pinching resiliently the extremity of communication track 3 between a tab 97 on the concave face 22b of communication track 3 and a tab part (not shown) on the convex face 22a of the communication track 3. The free end of tab 97 exhibits a part 98 extending substantially perpendiculary to the communication track 3 in a direction opposite to the communication track 3, i. e. tab 97 with part 98 form a L-shaped member. A first hole is arranged in tab 98 with an axis parralel to communication track 3. A screw 99 is arranged through said hole and the head of said screw 99 rests on tab 98 on the side of the extremity of the communication track 3. Said screw 99 is used to secure the longitudinal support 90 for the lighting tube 91. On fig. 13, only the extremity 103 of said support 90 is shown, said extremity receiving the lighting tube 91. Said extremity 103 is extended by a longitudinal tab 101. The free end of said tab 101 exhibits a part 102 extending away frorn communication track 3 in a substantially perpendicular fashion, i. e. tab 101 with part 102 form a L-shaped member. Tab 102 has a threaded hole cooperating with the threaded part of screw 99. As a consequence, the longitudinal support 90 is held by the end caps 96a, 96b through one screw 99 at each extremity.

Further, this allows also to hold both end caps 96a, 96b on communication track 3 due to the tightening effect by screwing both end caps 96a, 96b on the support 90. Hence, the above mentionned press-fit securing of end cap 96a (and end cap 96b) onto communication track 3 may be omitted. Alternately, said hole in tab 102 may not be threaded in which case a corresponding nut will be used with screw 99. Further, this

system allows to secure lighting tube of standard lengthes onto communication track 3 having varying lengthes because screw 99 allows to compensate thes length variations, and it is even possible to select the length of screw 99 accordingly if necessary. The end cap 96 may be made e. g. in plastic or in aluminium.

We will now describe how the frosted screen is articulated onto the end cap 76. The longitudinal frosted screen 107 has the same general shape as screen 86 in fig. 11.

However, screen 107 has a longitudinal bead member 100 arranged on its edge on the side of communication track 3, in the extremity region. The length of said bead member 100 is limited compared to the length of the whole screen 107. A longitudinal hole is arranged through said bead member 100. A transversal portion of said bead member 100 and a further part of screen 107 are removed, either through the moulding itself or by cutting out. Said transversal portion is slightly larger than the thickness of tab 98.

The longitudinal location od said removed transversal portion on both extremities of screen 107 are so that they are separed by a length corresponding to the distance between tabs 98 of each end cap 96a, 96b mounted on communication track 3. Each tab 98 is engaged into said removed transversal portions of screen 107. A screw 104 is arranged through both the longitudinal hole of bead member 100 and a second longitudinal hole arranged on tab 98 below the first longitudinal hole for screw 99. A nut 105 is tightened on the extremity of said screw 104. As a result, screen 107 is held by and articulated on both end caps 96a, 96b. Furthermore, a torsion spring 106 is arranged onto screw 104. A first leg member 106a of spring 106 pushes against the outer wall of screen 107 and the second leg member pushes against the concave face 22b of communication track 3. As a result, said spring 106 pushes screen 107 in direction of demonstration product track so that the edge of said screen 107 abuts said demonstration product track (as shown in embodiment of fig. lu). However, it is possible to omit spring 106 and use a spring 89 as shown in fig. 11.

Alternately, bead member 100 may be realised on the whole length of screen 107. The longitudinal hole in said bead member 100 may then have a limited length on each extremity region of screen 107 and be threaded for receiving screw 104.

Alternately, spring 106 may be omitted. The spring function for pushing screen 107 against product demonstration track is obtained through screen 107 itself, as it may be taken from fig. 14. For sake of clarity, fig. 14 shows only a part of end cap 96a and screen 107. To obtain said spring function, a longitudinal wing member 107a is arranged on longitudinal bead member (which is preferably arranged on the whole length of screen 107) on the side opposite to screen 107. Screen 107 is mounted on end caps 96a, 96b in the same manner than previously, i. e. a transversal portion is cut out

from bead member 100 and screen 107 as well as wing member 107a in order to receive tab 98 and the whole is maintained with a screw 99. When mounted, wing member 107 abuts on the concave face 22b of communication track 3 and as a result screen 107 is rotated upwardly against demonstration product track. By varying the angle of communication track 3 with the demonstration product track, screen 107 continue to abut on the demonstration product track due to the resilient characteristic of the plastic material used for screen 107.

The embodiments of fig. 13 and fig. 14 are particularly advantageous as they can easily be adapted on existing retail product demonstration track without any modifications or adaptation of its main parts, in particular, the communication track. There is not even a hinge member to add on communication track as it is the case in fig. 11 and fig. 12.

There is only to replace the existing end caps with those described in these embodiments.

In relation with fig. 15, we will show the advantages of the embodiments shown in fig. 11 to fig. 14. Fig. 15 is a side view showing three shelves 92a, 92b, 92c in superposed relationship, each having a retail product display system repectively referenced 93,95a, 95b comprising an illumination system secured on its edge. In the past, lighting systems were secured under the shelf in order to illuminate the retail product display system located on the shelf underneath. Such an illumination system 94 equips the retail product display system 93 of the upper shelf 92a. This system has a drawback consisting in the fact that only the underlying shelf 92b is well illuminated, but the communication track as well as the demonstration products on the demonstration product track of the associated retail product display system 95a are only poorly illuminated, particularly in the case of fig. 15 where the underlying shelf 92b is larger than shelf 92a (for visual commodity of clients). The remedy to this problem consisting in increasing the power of the lighting system is not convenient because it increases the power consumption and emits more heat so that underlying products may be damaged and hands of clients may be heated or burned.

The embodiment of fig. 11 to fig. 14 alleviates these drawbacks as the lighting system supported by communication track is located in the region above the communication track of the underlying retail product display system even if the underlying shelf is larger, at least if the difference of width is kept within appropriate limits. This result can be seen on fig. 14 with retail product display system 95a (as well as retail product display system 95b) which corresponds to any one of embodiment of fig. 11 to fig. 14. The illumination system of retail product display system 95a illuminates the shelf 92c,

the demonstration product track of retail product display system 95b as well as the communication track of the latter.

Of course, one skilled in the art will understand that the features of the embodiments decribed in relation with fig. 3 to 10 (locator for demonstration product track) may be adapted on retail product display systems of the prior art independently of the features described in relation with fig. 1 and 2 (linking means between shelf support track and demonstration product track and between demonstration product track and communication track). Similarly, the features of the embodiments decribed in relation with fig. 11 to 20 (lighting system adapted on the communication track) may be adapted on retail product display systems of the prior art independently of the features described in relation with fig. 1 and 2.

We will now describe a further embodiment of the invention. The present embodiment is based on a retail demonstration product system according to the embodiments described in relation with fig. 11 to fig. 15 (it may be adapted on all retail product display systems having a lighting system, in particular, those existing in the prior art). However, communication track 3 is preferably translucent or transparent by using, e. g. a plastic material. As a result, information of the labels placed on communication track 3 will be illuminated from the back through communication track 3 due to the presence of the lighting system behind communication track 3. Alternately, communication track 3 may be cut out in its middle region, i. e. between channel 25 and the lower edge corresponding to hook shaped member 23. The cut out portion preferably extends longitudinally over almost the whole length of communication track 3. Alternately, the cut out portion may be replaced by several cut out portions of smaller length arranged longitudinally one after the other. Hence, communication track 3 defines a frame on which labels may be placed as previously, i. e. between hook shaped members 23,24. Thus, labels are directly illuminated from the back by the lighting system. As a consequence, communication track 3 may then be made in an opaque material, e. g. aluminum.

Support 90 of lighting tube 91 is then also preferably transparent or translucent (and preferably made of a plastic material) if it extends longitudinally between communication track 3 and lighting tube 91 as shown in fig. 11. Alternately, as it can be taken on fig. 16, if support 90 is opaque, it is possible to design it narrow with respect to the width of communication track 3 so as to limit its shadow on communication track 3, and further, to place it near the lower edge of communication track 3 (i. e. near the edge

corresponding to hook shaped member 23) so that the shadow does not affect the illumination of the information displayed on communication track 3. Fig. 16 is a schematic perspective view limited to one end (the other end being designed symmetrically) of the lighting tube 91 secured on support 90 (made e. g. in aluminum) on which is resiliently articulated frosted light diffusing screen 108 (made preferably in plastic material). The neon tube retainer/connector 103 is secured by e. g. a screw 113 on the end of support 90 which is quite as wide as communication track 3. However, support 90 extends then towards its other end in a narrow fashion with respect to the width of communication track 3. This narrow portion of support 90 is preferably located on the lower edge (i. e. the edge corresponding to hook shaped member 23) of communication track 3 when it is mounted on it, thus, its shadow does not fall on the region containing information on communication track 3. Frosted light diffusing screen 108 is preferably made in transparent or translucent plastic material. As it can be taken on fig. 16, the lower part of screen 108 is hook shaped (indicated by reference numeral 110) and catches the lower edge of support 90. Further, the lower edge of screen 108 forms preferably a channel 111 corresponding substantially to the narrow region of support 90. Channel 111 catches support 90 in said narrow region. Further, channel 111 receives the supply wires 114 of neon tube 91, said wires passing through the larger end of support 90 towards tube retainer/connector 103 via two holes 112. The fact that channel 111 of screen 108 catches the edge of support 90 provides a resilient articulation between these two parts. Support 90 is somewhat longer (at least the deepness of the end cap of fig. 17) at each extremity with respect to screen 108 for securing purpose with end caps of fig. 17 (the mounting with help of end caps of fig. 17 will be described later). Of course, support 90 with screen 108 of fig. 16 may also be used on an opaque communication track for illuminating retail product display systems secured on shelves underneath as in fig. 15. The fact that screen 108 is mounted on support 90 is of course independent of the fact that communication track 3 has cut out portions or that communication track 3 is transparent or translucent, and thus, this way to secure a screen on communication track 3 may be used more generally on retail product display systems, in particular, those of the prior art.

Fig. 17 shows an end cap adapted to secure support 90 (with frosted light diffusing screen 108 mounted on it) described in relation with Fig. 16 on communication track 3.

This end cap comprises a front wall 115 shaped according to the convex face 22a of communication track 3 (cf. fig. 1) and a substantially plane back wall 120 arranged opposite to said front wall 115. An end wall 118 links the end edges of front wall 115 and back wall 120. The downward edges of front wall 115 and back wall 120 meet via a

wall shaped for receiving the downward located hook shaped member 23 of communication track 3. The upward edge region of front wall 115 is shaped for receiving the upward located hook shaped member 23 of communication track 3.

However, the upper edge of back wall 120 does not meet the upper edge of front wall 115, i. e. these upper edges are separated by a space 119 allowing longitudinal channel 25 of communication track 3 to project out of the end cap when mounted on communication track 3. The front edge of back wall 120 forms an outward bow 122 in its downward region. Bow 122 may be omitted (its use will appear in relation with another embodiment of support 90 and screen 108 described later). Further, a threaded hole 121 is arranged in back wall 120. For mounting support 90 on communication track 3, it should be proceeded as follows. First, the frosted light diffusing screen 108 should be mounted on support 90 by causing the lower edge of screen 108 to catch the lower edge of support 90. Secondly, support 90 (with screen 108 mounted on it) is manually held against concave face 22b (under channel 25), the lower edge of support 90 being located toward the downward edge of communication track 3 (i. e. the side corresponding to the downward located hook shaped member 123). Thirdly, an end cap is slid on an extremity of communication track 3 with front wall 115 of the end cap applied on the convex face 22a of communication track 3 and channel 25 projecting out through space 119. The end cap is slid on communication track 3 until end wall 118 abuts the extremity of communication track 3. As a result, the extremity of support 90 will be caught between communication track 3 and back wall 120 of the end cap. A corresponding screw may then be threaded through threaded hole 121 in order to apply firmly support 90 against communication track 3 as well as to secure the end cap itself.

This latter operation is repeated on the other extremity of communication track 3 with a symmetrical end cap. The end cap of fig. 17 is well suited for maintaining all kinds of longitudinal supports (which may support other devices than a neon tube, if relevant) having flat extremities (as described for support 90 of fig. 16) against a communication track of a retail product display system, in particular, those of the prior art.

Fig. 18 shows a side view of another frosted light diffusing screen 125 suited for illuminating labels placed on a transparent or translucent communication track 3 (or having cut out portions) from the backside (however, it may also be used on an opaque communication track for illuminating retail product display systems secured on shelves underneath as in fig. 15). Screen 125 has two longitudinal wings 125a and 125b forming an angle preferably comprised between about 60° and 90°, more preferably of about 80°. Screen 125 is preferably made in one piece in transparent or translucent plastic material. Wing 125a performs the frosted light diffusing screen characteristic. Wing

125b forms a support for securing screen 125 on communication track 3 with help of end caps of the type described in relation with Fig. 17. Wing 125b is somewhat longer (at least the deepness of the end cap of fig. 17) at each extremity with respect to wing 125a for securing purpose with end caps of fig. 17. A channel 126 is arranged on the free end of wing 125. Channel 126 is open toward the side of wing 125a. Another channel 127 is arranged in the end region of wing 125b toward wing 125a. A neon tube retainer/connector 103 is secured by e. g. a screw or glue on each extremity of wing 125a, on the side corresponding to wing 125b (however, retainer/connectors 103 may alternately be arranged on wing 125b on the side corresponding to wing 125a). The characteristic consisting in the fact that neon tube retainer/connectors are directly secured on the wing 125a forming the frosted light diffusing screen (instead of securing it on another support as for instance wing 125b) is independent from the other characteristics of screen 125, thus, the characteristic consisting in securing the neon tube retainer/connectors on the light diffusing screen may be adapted on all retail product display systems having a lighting system on communication track 3, in particular, those described in relation with fig. 11 to 16. Fig. 19 shows a cross section of screen 125 mounted on communication track 3 secured by an end cap 129 (represented in dotted line) of the type of Fig. 17. As it can be seen on fig. 19, screen 125 is held in a similar way than described previously for support 90 in fig. 16, except that it is the extremity of wing 125b (instead of support 90) that is taken between concave face 22b of communication track 3 and back wall 120 of the end cap. Further, channel 126 maintains supply wires 128 for the neon tube. As it can be seen on fig. 19, the outer shape of wing 125b corresponds to the shape of the concave face 22b of communication track 3 and the upper wall of channel 126 adapts the lower wall of channel 25 of communication track 3 which forms a slight neck so as to obtain a further securing effect improving the one provided by the end caps. Optionally, communication track 3 may have a longitudinal bead member 130 arranged on the lower region of its concave face 22b and adapted for clipping on it channel 127: in this case, end caps are no more necessary for securing purpose of screen 125 on communication track 3. The securing characteristic consisting in the fact that wing 125b comprises a channel 127 clipped on a bead member 130of communication track 3 as well as the securing characteristic consisting in the fact that upper wall of channel 126 of wing 125b adapts the lower wall of channel 25 of communication track 3 are independent, thus, they may be adapted on all retail product display systems for securing a support of a lighting system on a communication track, in particular, in the embodiments described in relation with fig.

11 to 16. If bead member 130 is omitted, channel 25 may be used to maintain supply

wires. Bow 122 of the end cap of fig. 17 adapts on the outer surface of the wall defining channel 127. The fact that neon tube retainer/connectors 103 are arranged on wing 125a avoids advantageously their shadows to fall on communication track 3 and facilitates the exchange of the neon tube.

In the previous embodiments, described with reference to fig. 11 to fig. 15, as well as in the prior art, information labels placed on communication track 3 is only illuminated on the front side by the lighting system of another retail demonstration product system secured on the shelf just above. This embodiment of the invention is advantageous as labels placed on communication track 3 are (also) illuminated from the back and thus, information displayed on them is furthermore emphasized.

Another embodiment of the invention is based on a retail demonstration product system according to the embodiments described in relation with fig. l 1 to fig. 19 (it may also be adapted on retail product display systems of the prior art). However, demonstration product track 2 material is preferably translucent or transparent by using e. g. a plastic material. As a result, demonstration products placed on demonstration product track 2 will be illuminated from the back through demonstration product track 2 due to the presence of the lighting system behind communication track 3. If a lining plate is adapted on arm 15, it may also be transparent or translucent, or said lining plate may be opaque except locations receiving corresponding demonstration products, which are translucent or transparent. Alternately, if demonstration product track 2 is made of an opaque material, e. g. aluminum, second arm 15 of demonstration product track 2 (cf. fig. 1) may be cut out in its middle region and a transparent or translucent lining plate be adapted on second arm 15 for supporting the demonstration products, i. e. between first 14 and arm portion. The cut out portion preferably extends longitudinally over almost the whole length of demonstration product track 3. Alternately, the cut out portion may be replaced by several cut out portions of smaller length arranged longitudinally one after the other, corresponding each e. g. to one demonstration product location. Thus, demonstration products are directly illuminated from the back by the lighting system with the result that they are furthermore emphasized.

Fig. 20 shows another embodiment of the invention directed to the supply system of the neon tube 91 of the embodiments described in relation with Fig. 11 to 19 (it may also be used in conjunction with retail product display systems of the prior art having a lighting system). Neon tube 91 is supplied by a ballast usually secured on the lower side of a shelf on which is secured the retail product display system. In this embodiment, the

ballast (not shown) is secured in a housing comprising a rectangular box 130 closed with a cover 131 via e. g. screws. One end of box 130 and cover 131 projects outward according e. g. a rectangular cross-section forming a gutter 134 through which supply wires for the neon tube may leave box 130. The base of box 130 is extended on one longitudinal side by a first flat wing member 132 parallel to said base. The free end 132a of first wing member 132 is curved downwards, i. e. toward the side opposite to box 130 with respect to its base. The base of box 130 is extended on the other longitudinal side by a second flat wing member 133 via a curved portion 136. Second wing member 133 extends, in spaced relationship, parallel to the base of box 130 and to first wing member 132. The free end 133a of second wing member 133 is curved upwards, i. e. toward first wing member 132. The ballast, which is inside box 130, is connected to the main supply by a connector 135 arranged preferably on a lateral side of box 130.

This housing is advantageously easy to mount on the shelf on which is secured the retail product display system. In reference to Fig. 1, the housing may be mounted by simply holding it so that cover 131 is downward and by inserting second wing member 133 between shelf 4 and lower leg member 6 of shelf support track 1, provided that the gap between them is sufficient. Wing 133 should be inserted until the curved portion linking it to the base of box 130 abuts the end of leg member 6. The housing is sufficiently held on leg member 6 due to the pinching effect between the curved extremities 132a, 133a of first and second wing member 132 and 133, due to curved portion 136 which provides for resilience. However, in case screws are provided on leg member 6 for securing the retail product display system on the shelf, they will advantageously secure by the same the housing containing the ballast (in which case wing member 132 may be omitted).

Further, ballasts for neon tube are often class I products (electric security specification). However, box 130 and its cover 131 may be adequately conceived and made of adequate plastic material in order to meet class II requirements. So, the ballast may be supplied with only two wires (connector 135 has only two pins as it can be seen on the drawing) as grounding is no more necessary. This is an advantage if, in the shop, grounding wire has not been laid till the shelves on which the retail product display system is secured.

The invention is not limited to the embodiments described. For example, the demonstration product locator and lighting system according to the invention may well be mounted on other existing retail product display systems, if needed.