CH703382B1 - decorative piece in invisible setting. - Google Patents

Abstract

The invention relates to a decoration piece comprising a plurality of stones (2) and a fixing device (7 ') stones (2) Tune relative to each other. According to the invention, the fixing device (7 ') comprises a single electroformed base (9') of a shape corresponding to a part of said stones making it possible to fasten all the stones (2) without constraint with respect to each other and the layers (6) of stones (2) are mounted edge-to-edge relative to each other so that said single base is masked. The invention also relates to the method of manufacturing such a part. The invention relates to the field of jewelery articles, jewelery or timepieces.

Description

Description

Field of the invention

The invention relates to an invisible set piece of decoration and, more specifically, a decorative piece including a jewelery or jewelery item forming a paved stone suitable for decorating a surface.

Background of the invention

It is known to crimp precious stones, semi-precious or synthetic using claws, grains or rails. There are also crimps of the invisible type which solidarize the stones by their breech. In the current state of the techniques of invisible seam, there are many methods (by milling, casting, clipping, screwing, etc.) which according to well-defined systems have many disadvantages: the natures, geometries and dimensions of the stones are often limited, the heights, the depths and the angles of the throats are often constraining, the scratches, grits and cracks of stones during the operations exist, even the repairs during a change of stone cause grits on the annexed stones, etc. Also, the majority of these methods require, during the crimping operation, the manual intervention of a crimper. Even if the latter is highly qualified, the risk of loss, scratching, cracking or scratching of the stones is permanent.

Summary of the invention

The object of the present invention is to overcome all or part of the aforementioned drawbacks proposing an industrial manufacturing process for obtaining a homogeneous assembly of stones, a diversity of shape, an improved accuracy and a better quality fixation to lower cost.

For this purpose, the invention relates to a decoration piece comprising a plurality of stones and a device for fixing the stones relative to one another, characterized in that the fixing device comprises a single electroformed base of shape corresponding to a portion of said stones for attaching all the stones without constraint relative to each other and in that the stone layers are mounted edge to edge relative to each other so that said single base is masked.

Advantageously according to the invention, the base is formed according to the dispersions of the stones due to the sizes which avoids generating internal stresses in the stones. The base, because it is electroformed, adapts directly to the shapes of stones.

According to other advantageous features of the invention:

- The fixing device attaches the stones relative to each other by their cylinder head or by their crown;

- the single base covers or not all the cylinder heads or crowns of said stones;

the fastening device comprises at least one groove made in at least one of the stones at their cylinder head or crown so that the single base, of shape at least partially corresponding to each stone, forms at least one hook for each of said stones;

said at least one groove forms two grooves in two faces of the stone;

the single base comprises at least one electrically conductive layer deposited on the stones;

the single base comprises a second layer electrodeposited from said at least one reflection layer in order to improve the strength of the decoration piece;

said at least one electrically conductive layer is used as a reflection layer;

the single base comprises pure silver and a protective layer covering the silver in order to prevent its tarnishing by oxidation.

The invention also relates to an article of jewelry or a jewelery and a timepiece characterized in that they comprise, reported, a decoration part according to one of the previous variants.

Finally, the invention relates to a method of manufacturing a decoration part characterized in that it comprises the following steps: a) to provide several stones; b) solidariser each stone against a support, the layers of stones being mounted edge to edge relative to each other to form a stone pavement; c) depositing a first electrically conductive layer on at least a portion of said stones; d) electroplating a second layer from the first electrically conductive layer to form a single base; e) removing the decoration piece thus formed by separating each of said stones relative to the support. According to other advantageous features of the invention:

the process comprises, between step a) and step b), step f): etching at least one groove in the yokes of said stones so that the single base electrodeposited during step d) fills each of said at least one groove forming a fixing hook and, in step c), the deposition of the first layer is performed on at least a portion of the cylinder heads of the stones;

2 - the method comprises, between step a) and step b), step f): etching at least one groove in crowns of said stones so that the single base electrodeposited in step d) fills each said at least one groove forming a fastening hook and, in step c), depositing the first layer is performed on at least a portion of the crowns of the stones;

the support comprises imprints intended to receive the stones;

the process comprises, between step c) and step d), step g): forming a frame around said pad in order to circumscribe the electrolytic deposit of step d) above said stone sheets;

step c) is carried out by spraying a fluid comprising silver powder.

Brief description of the drawings

Other features and advantages will become apparent from the description which is given below, for information only and in no way limiting, with reference to the accompanying drawings, in which: FIG. 1 fig. 2 fig. 3 fig. 4 fig. Fig. 6 fig. 7 fig. 8 fig. 9 fig. FIG. 11 fig. 12 fig. 13 figs. 14 to 16 fig. 17 fig. 18 fig. 19 fig. FIG. 21 is a perspective representation of a stone fixing step according to a first embodiment of the invention; is a sectional representation of the end of the fixing step according to a first embodiment of the invention; is an enlarged partial representation of FIG. 2; is a representation of FIG. 3 according to an alternative of the invention; is a representation similar to FIG. 3 of a first deposition step according to a first embodiment of the invention; is a perspective representation of a second deposition step according to a first embodiment of the invention; is a sectional representation of the end of the second deposition step according to a first embodiment of the invention; is a sectional representation of a decorative piece according to a first embodiment of the invention; is a sectional representation of a decorative piece according to a variant of a first embodiment of the invention; is a view from above of a decoration piece according to the invention; is a top view of a decorative piece according to a variant of the invention; is a top view of a decorative piece according to another variant of the invention; is a block diagram of the manufacturing method according to the invention; are representations of stone fixing steps according to a second embodiment of the invention; is an enlarged partial representation of FIG. 18; is a representation similar to FIG. 17 of a first deposition step according to a second embodiment of the invention; is a sectional representation of the end of the second deposition step according to a second embodiment of the invention; is a sectional representation of a decorative piece according to a second embodiment of the invention; is a sectional representation of a decorative piece according to a variant of a second embodiment of the invention.

3 Detailed Description of the Preferred Embodiments

As illustrated in FIGS. 8 to 12, 20 and 21, the invention relates to generally annotated decorative pieces

I, 3 and 5 can be reported, in particular, on jewelery or jewelery and timepieces (especially in terms of the dial and the dressing). However, these decorative pieces 1, 3, 5 can not be limited to the above applications. For example, the decorative pieces 1, 3, 5 could also be reported on other objects such as, for example, glasses.

More particularly, the invention relates to a fixing device 7, 7 <'>, 47, 47 <'> of the invisible type set to attach several precious stones 2, semi-precious or synthetic by their cylinder head 4 or by their crown 18 so that the layers 6 of the stones 2 (also called rondistes) are mounted edge to edge so that the tables 8 of the stones 2 are substantially coplanar.

Thus, whatever the distribution and / or the shape of the stones 2 used as illustrated for example in FIGS.

10 to 12, the fixing device 7, 7 <'>, 47, 47 <'> comprises a single base 9, 9 <'>, 49, 49 <'> tying the stones 2 relative to each other so as to very precise. Advantageously according to the invention and contrary to what is usually done to make an invisible seam, the material of the base 9, 9 <'>, 49, 49 <'> is made as and as and not removed and then deformed at gradually.

It is immediately understood that the single base 9, 9 <'>, 49, 49 <'>, which is mainly electrodeposited, thus allows to perfectly cover the cylinder heads 4 or rings 18 of the stones 2 with a minimum of mechanical stresses transmitted to the stones.

Thus, advantageously according to the invention, the base 9, 9 <'>, 49, 49 <'> is natively corresponding in shape to the yokes 4 or the rings 18 of the stones 2 whatever the dispersions thereof. This is made possible by the use of a manufacturing method 21 according to the invention which will be explained hereinafter and which comprises in particular a step 29 of electroplating.

According to a first embodiment illustrated in FIGS. 1 to 9, the single base 9, 9 <'> comprises at least two layers

I I, 1 1 <'> and 13, 13 <'>. In the examples of FIG. 5, 7, 8 and 9, the respective thicknesses of the layers 1 1, 1 1 <'> and 13, 13 <'> are not on the same scale for a better understanding. Indeed, the first layer 1 1, 1 1 <'> is actually much smaller than the thickness shown in Figs. 5, 7, 8, 9 and very small relative to the thickness of the second layer 13, 13 <'>.

The first layer 1 1, 1 1 <'> is intended to adhere to the yokes 4 of the stones 2 but also to provide an electrically conductive layer capable of serving as a sprouting surface for the second layer 13, 13 <'> which will be electrodeposited. If the first layer 1 1, 11 <'> has a preponderant role compared to the final aesthetic of the decoration part 1, 3, 5, the second layer 13, 13 <'> is, it, mainly used for its mechanical characteristics, that is to say, aims to improve the strength of the decorative part 1, 3, 5.

Thus, preferably according to the invention, the first layer 1 1, 1 1 <'> comprises a material with high reflection power to be used as a reflection layer of ambient light. It is understood that such a layer 1 1,

1 1 <'> thus makes it possible not to reduce too much the brightness of the decoration piece 1, 3, 5.

By way of example, according to the products and / or the materials on which the decoration part 1, 3, 5 is attached, the first layer 1 1, 1 1 <'> may comprise for and / or silver and / or platinum and / or palladium and / or iridium and / or copper and / or titanium and / or aluminum and / or nickel and / or tin and / or zinc. The second layer 13, 13 <'>, which is, as explained above, much thicker than the first layer 1 1, 1 1 <'>, can take from the latter the same materials or their alloys.

Preferably, when the single base 9, 9 <'> will be selected silver, a protective layer, such as silicon nitride to a thickness of a few microns, will be used in recovery to avoid tarnishing due to to the oxidation of silver.

In a first variant illustrated in FIG. 8, the fixing device 7 comprises a single base 9, the two layers 1 1, 13 cover all of the yokes 4 of the stones 2. This first variant allows a maximum brightness and / or a very homogeneous aesthetic of the decoration part 1 , 3, 5.

In a second variant illustrated in FIG. 9, the fixing device 7 <'> comprises a single base 9 <'> whose two layers 1 1 <'>, 13 <'> do not cover all the yokes 4 of the stones 2. As illustrated in FIG. 9, the single base 9 <'> thus forms a mesh which follows the leaflet 6 of the stones 2. This second variant makes it possible to improve the total internal reflection of the stones 2 used for the decoration part 1, 3, 5. It allows also not to have to open the single base 9 <'> mechanically, for example, using a crimping tool, and thus to avoid scratching the stones 2.

According to a second embodiment illustrated in FIGS. 14 to 21, the single base 49, 49 <'> thus comprises at least two layers 51, 51 <'> and 53, 53 <'>. As for the first embodiment, in the examples of FIGS. 18 to 21, the respective thicknesses of the layers 51, 51 <'> and 53, 53 <'> are not on the same scale either.

The first layer 51, 51 <'> is intended to adhere to the rings 18 and possibly the tables 8 of the stones 2 but also to provide an electrically conductive layer capable of serving as a sprouting surface for the second layer 53, 53 <'> which will be electrodeposited. If the first layer 51, 51 <'> has a preponderant role by

4 compared to the final aesthetic of the decorative part 1, 3, 5, the second layer 53, 53 <'> is, it, mainly used for its mechanical characteristics, that is to say, aims to improve the solidity of the decoration piece 1, 3, 5.

Thus, as for the first embodiment, preferably, the first layer 51, 51 <'> comprises a high reflection material to be used as a reflection layer of ambient light in order to Do not reduce the brightness of the decorative part 1, 3, 5 too much. By way of example, depending on the products and / or the materials to which the decorative part 1, 3, 5 is attached, the layers 51, 51 <'> and 53, 53 <'> may contain materials of the same type as those of the layers 1 1, 1 1 <'> and 13, 13 <'> respectively.

Preferably, when the single base 49, 49 <'> will be selected silver, a protective layer, such as for example silicon nitride to a thickness of a few microns, will be used in recovery to avoid tarnishing due to to the oxidation of silver.

In a first variant illustrated in FIG. 20, the fixing device 47 comprises a single base 49 whose two layers 51, 53 cover all the rings 18 and tables 8 of the stones 2. This first variant allows a maximum brightness and / or a very homogeneous aesthetic of the room decoration 1, 3, 5.

In a second variant illustrated in FIG. 21, the fixing device 47 <'> comprises a single base 49 <'> whose two layers 51 <'>, 53 <'> cover all the crowns 18 but not the tables 8 of the stones 2. As illustrated in FIG. fig. 21, the single base 49 <'> thus forms a mesh which follows the leaflet 6 stones 2. This second variant improves the total internal reflection of the stones 2 used for the decoration piece 1, 3, 5. It allows also not to have to open the single base 49 <'> mechanically, for example, using a crimping tool, and thus to avoid scratching the stones 2. Of course, the base 49 < may alternatively cover only part of the rings 18 or all of the rings 18 and a portion of the tables 8 of the stones 2 without departing from the scope of the invention.

The decoration piece 1, 3, 5 thus formed according to one of the embodiments, even in more or less complex shapes, such as, for example, a wave form 3 illustrated in FIG. 11, a form 5 without particular symmetry illustrated in FIG. 12 or a completely symmetrical form 1 illustrated in FIG. 10, can, therefore, be easily reported on a final product via its unique base 9, 9, 49, 49.

According to an alternative of the invention visible in FIGS. 3, 5, 8, 9, 17, 18, 20 and 21, in order to improve the fastening force of the fixing device 7, 7 <'>, 47, 47 <'>, each of the stones 2 comprises at least one groove 10, 50 respectively at the yokes 4 or at the rings 18. Because the base 9, 9 <'>, 49, 49 <'> perfectly matches the shape of the yoke 4 or the 18 crown of the stones 2, it is understood that the base 9, 9 <'>, 49, 49 <'> then form hooks that hold each stone 2 more firmly by its yoke 4 or its crown 18. Preferably, each stone 2 comprises two grooves 10, 50 on two opposite facets of its yoke 4 or crown 18. However, each groove 10, 50 may also form a peripheral groove on each yoke 4 or each ring 18 to maximize the force of mechanical fastening of the fixing device 7, 7 <'>, 47, 47 <'>.

According to another alternative of the invention, the single base 9, 9 <'>, 49, 49 <'> can also directly form the body of the final product which avoids having to report the decoration piece 1 , 3, 5 on another body.

The invention process 21 will now be explained in relation to FIGS. 1 to 9 and 13 to 21. In a first step 23, the method 21 is to be provided with stones 2, the laminates 8 allow their mounting edge to edge to, for example, to obtain the alternative embodiments of FIGS. 10, 1 1 and 12, that is to say a homogeneous plane of stones 2.

In a second step 25, the stones 2 are secured one after the other on a support 12, 52. Preferably, the method 21 comprising an electroplating step 29, the support 12, 52 comprises an electrically insulating material such as polypropylene or any other material compatible with process 21.

In the case of the first embodiment, as best seen in FIG. 2, the face 15 of the support 12 where are reported the stones 2 must have a good flatness. Preferably, each stone 2 is secured to the face 15 of the support 12 by gluing its table 8 by means of a glue of the cyanoacrylate type. Of course, other types of joining compatible with the rest of the process steps 21 or even other types of glue are conceivable.

Figs. 3 and 4 show a focused magnification on the laminates 8 of the stones 2 according to two alternatives of the invention explained above. It is thus immediately understood that the size accuracy of the 8 or rondist layers of the stones 2 is of great importance. Indeed, according to the invention the laminates 6 must be mounted edge to edge to limit the size of the interstices between the stones 2.

Thus, as explained above, in the case where it is not desired to improve the fastening force of the fixing device 7, 7 <'>, the stones 2 do not have grooves 10 and are brought to one another. against the others at their level 6 as shown in Figs. 1 and 4. In this case, it is understood that only the chemical interactions between the materials ensure the fixing of the stones.

In the case where it is desired to improve the fastening force of the fixing device 7, 7 <'>, an intermediate step 24 between step 23 and the step of securing 25 is necessary. Step 24 shown in broken lines in FIG. 13 is intended to engrave at least one groove 10 in at least a portion of the yokes 4 of the stones 2. Thus, during the step of joining, the stones 2 are brought against each other at their level 6 as illustrated in figs. 1 and 3. In the embodiment of FIG. 3, we can see that the grooves 10 of two stones 2 are vis-à-vis.

In the example illustrated in FIG. 1, it can be seen that the support 12 may also include a jig 14 of dedicated shape to help start the stone plane 2. This template 14 can thus form a square as in FIG. 1 to form a symmetrical decoration piece 1 or a curved body to form a decoration piece 3 in wave. At the end of step 25, as shown in FIG. 1, we thus obtain a block of stones 2 secured by their table 8 on the face 15 of the support 12.

The method 21 continues with a step 27 for forming the first layer 1 1, 1 1 <'> as shown in FIG. 5. As explained above, the first layer 1 1, 11 <'> adheres to the yokes 4 of the stones 2 to serve, on one side, germination surface for the second layer 13, 13 <'> and, of the other side, reflection layer. Thus, according to the variant chosen, the first layer 1 1, 1 1 <'> can cover each yoke 4 partially or completely on all or part of the yokes 4. This means that the embodiments of FIGS. 8 and 9 can also be combined to adapt the aesthetics of the decorative part 1, 3, 5.

Indeed, advantageously according to the invention, only the parts which will be covered with the first layer 1 1, 1 1 <'> in step 27, will comprise the single base 9, 9 <'> in the end . It is therefore understood that the aesthetic appearance diversity of the decoration part 1, 3, 5 does not make the manufacturing process 21 more difficult than the existing manual processes.

Step 27 may be performed according to several different methods. However, the projection of a conductive varnish, such as for example a fluid comprising silver powder (grains between 1 and 10 microns), is preferred. Indeed, if the precision of the laminates 6 is not perfectly controlled, it may be preferable to deposit at the level of the layers 6 to ensure homogeneous growth in the next step 29. In addition, the method of depositing by projection gives a very good aesthetic effect to each stone 2 after step 29 electroplating.

A physical vapor deposition or deposition by chemical metallization in addition to or in replacement of the above deposit are also possible. In the case of physical vapor deposition, a bonding layer, interposed between the stone surface and the first layer 1 1, 1 1 <'> of a few nanometers, for example chromium or titanium, can be used to to improve the adhesion while remaining substantially invisible.

At the end of step 27, it is therefore understood that the layer 1 1, 1 1 <'> prevents, especially at the leaflet 8, any passage between the yokes 4 and the rings 18 to protect the crowns 18 and, incidentally, the tables 8, of any deposit during the electroplating phase 29.

According to another alternative explained above, step 27 may be followed by step 28 in dashed lines and then step 29 or directly from step 29. Thus, if the decoration piece n ' is not intended to be reported on another element, the method 21 can directly go to step 29 to form a single base 9, 9 <'> which will form the raw body of the final element by electrically connecting the layer 1 1, 1 1 <'>.

However, preferably, a frame 16 is reported in step 28 to circumscribe the electrolytic deposition of step 29 above the layers 6 stones 2. Of course, the frame 16 can also be used to make a single base 9, 9 <'> which will form a rough sketch of the final element. If the frame 16 is used, that is to say if step 28 is performed, the frame 16 will preferably comprise an electrically conductive track 17 for connecting the first layer 1 1, 1 1 <'>. In addition, the walls of the frame 16 surrounding the stones 2 are preferably electrically conductive.

The method 21 is continued by the step 29 of electroplating the second layer 13, 13 '' from the first layer 1 1, 11 <'> in order to finish the production of the single base 9, 9 <'> as shown in fig. 7. Finally, in a last step 31 of the method 21, the decoration piece 1, 3, 5 thus formed is separated from the support 12 and, if it is used, from the frame 16.

Of course, between steps 23 and 31 or, optionally, after step 31, a machining and / or polishing step 30 can be performed in order to modify the shape of the single base 9, 9 <' >, either to form the final element, or to adapt the shape to be related to the final element.

In the case of the second embodiment, as best seen in FIGS. 14 to 18, the support 52 which are reported stones 2 is substantially different than that of the first embodiment. Indeed, in the second embodiment, the stones 2 are not reported by their boards 8 substantially flat but by their yokes 4 substantially pyramidal.

Thus, advantageously according to the invention, the support 52 according to the second embodiment comprises a board 59, as can be seen in fig. 14, formed of easily deformable material such as, for example, SnBi alloy. The board 59 is intended to be stamped with imprints 60 of substantially identical shape and distribution to the yokes 4 of the stones 2 as shown in FIG. 15. This board 59 stamped according to the second embodiment allows to work according to similar precisions in the first embodiment.

Preferably, each stone 2 is secured in a recess 60 on the face 55 of the support 52 by gluing its cylinder head 4 by means of an adhesive similar to the first embodiment. Fig. 17 represents a focused enlargement on the laminates 8 of the stones 2. It is understood, as for the first embodiment, that the accuracy of

The size of the 8 or the girdle 2 stones is also very important. Indeed, the laminates 8 must be mounted edge to edge to limit the size of the interstices between the stones 2.

The example illustrated in FIG. 17 is the one in which it is desired to improve its fastening force of the fastening device 47, 47 <'>, that is to say in which the stones 2 comprise at least one groove 50 at their crown 18. as for fig. 4 of the first embodiment, these grooves 50 may not be present.

Thus, in the case of FIG. 17, an intermediate step 24 shown in broken lines in FIG. 13 is intended to engrave at least one groove 50 in at least a portion of the rings 18 of the stones 2. Thus, during the step of joining, the stones 2 are brought against each other at their level 6 as illustrated in figs. 16 and 17. In the embodiment of FIG. 17, it can be seen that the grooves 50 of two stones 2 are vis-à-vis.

[0053] Compared to the first embodiment, it is no longer necessary to use a template. In fact, the imprints 80 make it possible to distribute the stones 2 with respect to each other. In the second embodiment, however, it is necessary at the end of step 25 to apply a slight stress on the tables 8 of the stones 2 in order to perfect their flatness and to reduce as much as possible the interstices between the layers 8 of the stones 2. At the end of step 25, we thus obtain a block of stones 2 secured by their yoke 4 on the face 55 of the support 52.

The process 21 continues with a step 27 intended to form the first layer 51, 51 <'> as illustrated in FIG. 18. As explained above, the first layer 51, 51 <'> adheres to the rings 18 and, possibly to the tables 8, stones 2 to serve, on one side, germination surface for the second layer 53, 53 <'> and, on the other side, reflection layer. Thus, depending on the variant chosen, the first layer 51, 51 <'> may cover each ring 18 partially or totally on all or part of the rings 18 and possibly each table 8 partially or totally on all or part of the tables 8. This means that the embodiments of FIGS. 20 and 21 can also be combined to adapt the aesthetics of the decoration piece 1, 3, 5.

Indeed, advantageously according to the invention, only those parts that will be covered with the first layer 51, 51 <'> in step 27, will include the single base 49, 49 <'> in the end. It is therefore understood that the aesthetic appearance diversity of the decoration part 1, 3, 5 does not make the manufacturing process 21 more difficult than the existing manual processes. As for the first embodiment, step 27 is preferably performed by spraying an electrically conductive varnish, such as for example a fluid comprising silver powder (grains between 1 and 10 microns). However, other types of deposit in addition to or in lieu of the deposit above are also possible.

At the end of step 27, it is therefore understood that the layer 51, 51 <'> prevents, especially at the level of the laminate 8, any passage between the yokes 4 and your rings 18 to protect the yokes 4 of any deposit during the electroplating phase 29.

According to another alternative explained above, step 27 may be followed by step 28 in dashed lines and then step 29 or directly from step 29. Thus, if the decoration piece does not is not intended to be reported on another element, the method 21 can directly go to step 29 to form a single base 49, 49 <'> which will form the gross body of the final element by electrically connecting the layer 51 , 51 <'>.

However, preferably, a frame 58 is reported during step 28 to circumscribe the electrolytic deposition of step 29 above the layers 8 stones 2. Of course, the frame 58 can also be used to make a single base 49, 49 <'> which will form a rough sketch of the final element. If the frame 58 is used, it will have the same specificities as the frame 18 of the first embodiment.

Compared to the first embodiment, the second embodiment using a board 59, preferably, the material will be adapted to be easily melted, that is to say having a low melting point, such as by example for the SnBi alloy around 80 ° C, in addition to being soft. Indeed, the step 31 is thus facilitated by melting the board 59 which releases the yokes 4 of the stones 2 of the support 52 without changing the nature of the base 49, 49 <'>.

The method 21 is continued by the step 29 consisting in electroplating the second layer 53, 53 '' from the first layer 51, 51 '' in order to finish the production of the single base 49, 49 < '> as shown in fig. 19. Finally, in a final step 31 of the method 21, the decoration piece 1, 3, 5 thus formed is detached from the support 52 and, if it is used, from the frame 58.

Of course, between steps 29 and 31 or, optionally, after step 31, a machining and / or polishing step 30 can be performed to modify the shape of the single base 49, 49 <' >, either to form the final element, or to adapt the shape to be related to the final element.

Reading the above explanations of the two embodiments, it is understood that the method 21 allows a wide variety of decorative pieces such as, for example, those of Figs. 10 to 12 having paved geometries with various stone shapes without its implementation is more difficult which allows its application to all kinds of precious stones, semi-precious or synthetic cheaply.

In addition, the yokes 4 or crowns 18 may be all or partially perforated or not without retouching steps are made necessary. It is also remarkable, according to the invention, that the stones 2 can be more or less high and / or of different shapes and / or distributed more or less symmetrically and that the heights, angles and depths of the grooves 10, 50 are more or less large, without the complexity of the process 21 being

7

Claims (21)

increased. Finally, according to the invention, the manufacturing conditions are improved by working directly by the yoke 4 or the crown 18 of the stones 2 while the current methods do not allow it and force to continually return the work to verify the proper assembly in the stones 2. This feature is particularly advantageous after-sales operations requiring the replacement of a single stone or a part of the stones. Thus, by the current mechanical methods of invisible seam, remove a stone is very difficult and induces a great risk of scratching, cracking or crimping stones close to the one to be replaced. On the contrary, advantageously according to the invention, it is possible to spare the adjacent stones, remove, for example chemically, the metal of the stone to be removed and then pick a new stone in place of the old and reform the entirety of the unique base by significantly reducing the risk of scratching, cracking or creasing of other pavement stones. The only restriction of the method 21 concerns the respect of the heights of 6 or rondiste layers to avoid the formation of interstices between the stones 2 during step 25. Finally, another advantage of the manufacturing method 21 according to the invention relates to saving time and, incidentally, cost. Indeed, not only the manufacturing method 21 is much shorter compared to a manual embodiment but, in addition, the steps 27 and / or 29 of several decoration pieces 1, 3, 5 can be made at the same time from of several supports 12, 52 or from a single support 12, 52. Of course, the present invention is not limited to the example shown but is susceptible to various variations and modifications that will occur to those skilled in the art. In particular, other embodiments than those shown in FIGS. 10 to 12 are possible. In addition, it is perfectly conceivable that the face 15, 55 of the support 12, 52 is not flat to allow the realization of a decoration part 1, 3, 5 whose tables 8 stones 2 are not not coplanar. Finally, it may well be envisaged that the template 14 of the first embodiment is replaced by the use of a punching of the type of the second embodiment of shape and distribution substantially identical to the set of rings 18 - 8 tables Whatever the embodiment, alternatively, the board 59 comprising the imprints 80 may also be made from a resin molded on the yokes 4 of the stones 2 which will actually be used. Thus, the stones 2 instead of being assembled one by one in an imprint 80 of the board 59 and then pressed under a slight constraint, would be overmolded directly by the resin, which would be mounted on the support 12, 52. claims 1. Decoration piece (1, 3, 5) comprising several stones (2) and a fixing device (7, 7 <'>, 47, 47 <'>) stones (2) with respect to the characterized in that the fixing device (7, 7 <'>, 47, 47 <'>) comprises a single base (9, 9 <'>, 49, 49 <'>) electroformed from a part of said stones either directly or with an electrically conductive intermediate layer making it possible to fasten all the stones (2) without constraint with respect to each other and in that the stone layers (2) are mounted one beside the other by to others so that the unique base is masked. 2. Part (1, 3, 5) according to the preceding claim, characterized in that the fastening device (7, 7 <'>) attaches the stones relative to each other by their yoke (4). 3. Part (1, 3, 5) according to the preceding claim, characterized in that the single base (9) covers all of the yokes (4) of said stones. 4. Part (1, 3, 5) according to claim 2, characterized in that the single base (9 <'>) leaves uncovered part of the yokes (4) of said stones. 5. Part (1, 3, 5) according to claim 1, characterized in that the fastening device (47, 47 <'>) attaches the stones relative to each other by their crown (18). 6. Part (1, 3, 5) according to the preceding claim, characterized in that the single base (49) covers all of the tables (8) of said stones. 7. Part (1, 3, 5) according to claim 5, characterized in that the single base (49 <'>) leaves uncovered part of the tables (8) of said stones. 8. Part (1, 3, 5) according to one of the preceding claims, characterized in that the fixing device (7, 7 <'>, 47, 47 <'>) comprises at least one groove (10, 50 ) made in at least one of the stones (2) so that the single base (9, 9 <'>, 49, 49 <'>), of shape at least partially corresponding to said at least one groove, forms at least one hook for each of said at least one of the stones (2). 9. Part (1, 3, 5) according to the preceding claim, characterized in that said at least one groove (10, 50) forms two grooves in two faces of each stone (2). 8 10. Part (1, 3, 5) according to one of the preceding claims, characterized in that the single base (9, 9 <'>, 49, 49 <'>) comprises at least one electrically conductive layer (1 1 , 11 <'>, 51, 51 <'>) deposited on the stones (2). 1 1. Part (1, 3, 5) according to the preceding claim, characterized in that the single base (9, 9 <'>, 49, 49 <'>) comprises a second layer (13, 13 <'>, 53, 53 <'>) electroplated from said at least one electrically conductive layer to improve the strength of the decoration piece (1, 3, 5). 12. Part (1, 3, 5) according to claim 10 or 1 1, characterized in that said at least one electrically conductive layer (1 1, 11 ', 51, 51 <'>) is used as a reflection layer. 13. Part (1, 3, 5) according to one of the preceding claims, characterized in that the single base (9, 9 <'>, 49, 49 <'>) comprises pure silver and a layer of protection covering the silver to prevent oxidation tarnishing. 14. Timepiece, characterized in that it comprises, reported, at least one decoration piece (1, 3, 5) according to one of the preceding claims. 15. Article of jewelry or jewelry, characterized in that it comprises, reported, at least one decoration piece (1, 3, 5) according to one of claims 1 to 13. 16. A method of manufacturing (21) a decorative piece (1, 3, 5), characterized in that it comprises the following steps: a) to provide (23) several stones (2); b) securing (25) each stone (2) against a support (12, 52), the feuilletis (6) stones (2) being mounted edge to edge relative to each other to form a stone pavement (2); c) depositing (27) a first layer (1 1, 1 1 <'>, 51, 51 <'>) electrically conductive on at least a portion of said stones; d) electroplating (29) a second layer (13, 13 <'>, 53, 53 <'>) from the first electrically conductive layer to form a single base (9, 9 <'>, 49,49 < '>); e) removing (31) the decoration piece (1, 3, 5) thus formed by separating each of said stones relative to the support (12, 52). 17. Process (21) according to the preceding claim, characterized in that it comprises, between step a) and step b), the following step: f) etching (24) at least one groove (10) in yokes (4) of said stones so that the single base (9, 9 <'>) electrodeposited in step d) fills each of said at least one groove (10) forming a fastening hook; and in that, in step c), the deposition of the first layer (1 1, 1 1 <'>) is performed on at least a portion of the yokes (4) of the stones (2). 18. Process (21) according to claim 16, characterized in that it comprises, between step a) and step b), the following step: f) etching (24) at least one groove (50) in rings (18) of said stones so that the single base (49, 49 <'>) electrodeposited in step d) fills each of said at least one groove (50) forming a fastening hook; and in that, in step c), the deposition of the first layer (51, 51 <'>) is performed on at least a portion of the rings (18) of the stones (2). 19. The method according to claim 16, wherein the support comprises imprints for receiving the stones 20. Process (21) according to one of claims 16 to 19, characterized in that it comprises, between step c) and step d), the following step: g) forming (28) a frame (18, 56) around said pad to circumscribe the electrodeposition of step d) above said stone sheets (2). 21. Process (21) according to one of claims 16 to 20, characterized in that step c) is carried out by spraying a fluid comprising silver powder. 9