# Patent

## Title
Method of forming chain links

## Abstract

Several methods of forming links are disclosed, whereby the outer peripheries of such links are contoured prior to assembly into rope chains. In one embodiment, the wire used in the formation of intertwinable links is contoured and then cut into individual, pre-contoured links. In another embodiment, the outer periphery of non-contoured links are individually contoured prior to the intertwining of such links to form actual rope chains. In another embodiment, individual links are stamped with inner and outer peripheries of different shapes. In yet another embodiment, individual links are collectively contoured, preferably after arrangement on a support such as an ice lathe or a mandril. Such contouring can be accomplished by hand, machine or the like. If such links are not already provided with a gap, then a gap can be formed into the links as part of the contouring step.

## Background
CROSS-REFERENCES TO RELATED APPLICATIONS
This is a continuation of U.S. patent application Ser. No. 10/107,994 filed Mar. 27, 2002, which is a continuation-in-part of U.S. patent application Ser. No. 09/473,594 filed Dec. 29, 1999, now U.S. Pat. No. 6,389,790.


FIELD OF THE INVENTION
This invention relates to a method of forming chain links for use in making fine jewelry rope chains, and more specifically, to method of contouring the outer periphery of individual links.
BACKGROUND OF THE INVENTION
A fine jewelry “rope” chain is usually comprised of individual links intertwined to form a chain having the appearance of a double helix. The intertwining of such links is customarily done by hand, with gaps facilitating the interengagement or intertwining of links to form a chain. The rope chain art has evolved considerably since its inception, to the extent that a layman probably takes for granted the complicated and various methods used to create a highly decorative and ornamental piece of jewelry.
The appearance of individual links and the manner in which such links are intertwined to form a chain usually dictate the appearance of the resultant chain. The prior art is replete with rope chains formed from solid and hollow links having all different shapes and sizes. Such links are also formed using a variety of methods. Conventionally, a solid or hollow wire is wrapped around a supporting core and then cut so that the wire separates into individual pieces, each piece having a gap for intertwining with other pieces (the term “wire” is customarily used in the jewelry rope chain art and will be used herein to designate a solid strand of material, or a flat, stamped material that has been rolled into an elongated strand of tubular cross-section). After the wire is cut, and before the individual pieces can be intertwined, the pieces are flattened into links. Other methods of creating links are known in the art, including punching an individual link from a sheet of material using a one-step process as taught by Rozenwasser in U.S. Pat. No. 5,544,477 or a two-step process as taught by Grando in U.S. Pat. No. 5,309,704.
Recently, there has been a movement in the rope chain field toward highly decorative surface ornamentation, where the outer surface or periphery of individual chain links are modified or materially altered, both before and after they have been formed into a rope chain. Surface ornamentation usually occurs after the links have been assembled into a rope chain, through methods widely known in the art. This usually involves the creation of a rope chain, followed by the faceting, notching, cutting, bending, deforming, scraping or the like, of distinct portions of such chain, until the desired surface effect is achieved on exposed portions of individual links and the chain as a whole.
Certain methods of surface ornamentation are dependent or preferred based on the type of link used to form the chain, while other methods are preferred depending on the desired effect one wishes to achieve. For example, U.S. Pat. No. 5,129,220 to Strobel and U.S. Pat. No. 5,353,584 to Strobel et al., disclose the incremental deforming, by a blunt, burnishing tool, of a hollow link rope chain, which, after several passes by such tool, results in individual links having flattened exposed surfaces. U.S. Pat. No. 5,285,625 to Ofrat et al. discloses the use of a diamond cut forming machine to create diamond cut facets extending spirally around the longitudinal center of the chain, while U.S. Pat. No. 5,303,540 to Rozenwasser discloses the use of a diamond-cutting edge to create shallow depressions along the surface of a thin plate of metal that will eventually be formed into a wire and then a link. The Rozenwasser '540 patent also discloses the creation of shallow depressions on a wire prior to dividing or cutting into links, while U.S. Pat. No. 5,412,935, also to Rozenwasser, discloses the cutting of facets into a link having a raised surface. See also U.S. Pat. No. 5,537,812 to Rozenwasser. U.S. Pat. Nos. 5,471,830 and 5,526,639 to Gonzales disclose the cutting of an assembled rope chain to create a continuously curved surface.
In addition to providing surface ornamentation in the form of faceting and contouring, the overall appearance of rope chains has in the past been altered by using links of various shapes. For example in U.S. Design Pats. Nos. 368,048 and 370,184 and 370,426 all to Rozenwasser, modified “C”-shaped links are intertwined to form jewelry rope chains having unique overall designs. While the design of each link is ornamentally unique, each link has a consistent inner and outer peripheral surface and profile and a consistent thickness along such profile.
The faceting and contouring of assembled rope chains has become fairly complicated to meet the demands for unique surface configurations. This has resulted in contouring methods and machinery of increased complexity. There exists a need, therefore, for a method of creating fashionably contoured rope chains that is relatively uncomplicated, efficient to implement, inexpensive in its operation, and provides the designer with a multitude of contouring options unseen or unexperienced in the prior art. Recognizing this need, the present inventor has devised a method of creating ornamentally desirable rope chains by fashionably contouring the outer periphery of individual links, thereby avoiding the costly process of enlisting complicated machinery to act upon ever-increasingly complicated rope chain configurations. More specifically, one embodiment of the method of the present invention involves the arrangement of individual links onto a mandril, followed by the contouring of the outer periphery of such links by hand, machine or the like. After the individual links have been contoured as desired, the links are removed from such mandril and assembled into rope chains using methods known in the art. In other embodiments, the outer peripheries of individual links are contoured without the use of a mandril.
OBJECTS OF THE INVENTION
It is an object of the present invention, therefore, to provide a method of creating fashionably contoured rope chains that is relatively uncomplicated, efficient to implement, inexpensive in its operation, and provides the designer with a multitude of contouring options.
It is a further object of the present invention to provide a method of creating fashionably contoured rope chains by contouring the outer periphery of individual chain links prior to assembly into rope chains.
It is a still further object of the present invention to provide a method of creating fashionably contoured rope chains by contouring the outer periphery of a coiled wire prior to separation into individual links and assembly of such links into rope chains.
It is a still further object of the present invention to provide a method of creating fashionably contoured rope chains by arranging individual chain links onto a mandril prior to contouring the outer periphery of such links.
It is a still further object of the present invention to provide a method of creating fashionably contoured rope chains by arranging individual chain links onto a mandril and contouring the outer periphery of such links along one or a variety of locations along such outer periphery.
It is a still further object of the present invention to provide a method of forming chain links by contouring the outer peripheries of such links, whether created from a wire, a punching process or the like, while arranged on a mandril.
It is a still further object of the present invention to provide a method of forming chain links by contouring the outer peripheries of such links by hand, machine or the like.
It is a still further object of the present invention to provide a method of forming chain links by arranging such links on a preferably flexible mandril for passage through contouring apparatus.
It is a still further object of the present invention to provide a method of forming chain links by punching, stamping or die extruding links with contoured outer peripheries.
It is a still further object of the present invention to provide a method of forming chain links having inner and outer peripheries of different shapes.
It is a still further object of the present invention to provide a method of forming chain links having a non-uniform thickness.
Still other objects and advantages of the invention will become clear upon review of the following detailed description in conjunction with the appended drawings.
SUMMARY OF THE INVENTION
Individual chain links used in forming jewelry rope chains are provided, being formed from solid or hollow wire, punched or the like, and being produced using methods known in the art. The outer peripheries of such links are contoured prior to assembly into rope chains. In one embodiment, the outer periphery of links are contoured during the creation of the link, which can occur during a stamping process, or while the link material is still in the form of a wire. In another embodiment, non-contoured links are arranged on a mandril, and the outer peripheries of such links are then contoured as desired. Contouring of the outer periphery can be accomplished by hand, machine or the like. Prior to contouring of the outer periphery, the individual chain links or material made therefrom may or may not have a gap for intertwining with other links to form a rope chain. If individually created links are not provided with a gap, i.e., if the links have continuous inner and outer peripheries, then a gap can be formed into such links as part of the contouring step. The outer peripheries of wire or links used in the formation of rope chains may be contoured using a single stroke or pass by a contouring mechanism, or several passes, until the desired contouring is achieved.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of a wire wound around a support illustrating a prior art method of forming links for the assembly of rope chains.
FIG. 2 is a front view of a prior art link used in the assembly of rope chains.
FIG. 3 is an isometric view of one method of forming chain links for assembly into rope chains, illustrating the contouring the outer periphery of a wire prior to segmenting into individual links.
FIG. 4 is a front view of an individual link having a contoured outer periphery formed in accordance with a method of the present invention.
FIG. 5 is a diagrammatic view of a stamping method of forming chain links having contoured outer peripheries for assembly into rope chains and the like.
FIG. 6 is a front view of a link that will be contoured in accordance with one method of the present invention.
FIG. 7 is an isometric view of a mandril onto which links are arranged prior to contouring the outer peripheries of such links.
FIG. 8 is an edge view of a link arranged on a mandril.
FIG. 9 is an isometric view of a plurality of links slidably arranged on a mandril.
FIG. 10 is an isometric view of a mandril provided with a stopping means along one edge thereof.
FIG. 11 is a top, diagrammatic view of a link-loaded mandril being passed through contouring apparatus.
FIG. 12 is a top, diagrammatic view of a link-loaded mandril being passed on each side through a single contouring apparatus.
FIG. 13 is a top, diagrammatic view of a link-loaded mandril being passed through multiple contouring apparatus.
FIGS. 14a through 14bp illustrate a variety of individual link configurations capable of being produced in accordance with the method of the present invention.
FIG. 15 is an edge view of a link having continuous inner and outer peripheries arranged on a mandril.
FIG. 16 is an edge view of a link-loaded mandril passing through contouring apparatus.
FIG. 17 is a representation of a rope chain created from links formed in accordance with method of the present invention.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Rope chain links are usually contoured after the links are formed into chains by passing such chains through contouring implements, such as cutters, presses and the like. Solid links are conventionally contoured or faceted by cutting, while hollow links are conventionally contoured or faceted by pressing or stamping.
In accordance with the method of the present invention, contouring of the outer periphery of chain links occurs prior to assembly of such links into rope chains. In one embodiment, the wire used in the formation of intertwinable links is contoured and then cut into individual, pre-contoured links. In another embodiment, the outer periphery of non-contoured links are individually contoured prior to the intertwining of such links to form actual rope chains. In yet another embodiment, individual links are collectively contoured after they are arranged on a supporting structure, such as a mandril. Such links may be contoured by hand or machine as the case may be. If a machine is used to contour links supported on a mandril, for example, it is preferable that the links are supported on a flexible mandril, particularly if the passage of links through or by contouring apparatus occurs along a circuitous route. It will be understood that chain links or links of any size, shape, thickness, material and cross-section may be used, for the method of the present invention is not meant to be limited to any particular link configuration. Therefore, while certain link cross-sections are shown for purposes of illustrations, whether they be annular or rectangular, it will be understood that the overall shape of the link could also be oval, triangular, square or the like.
In accordance with another aspect of the method of the present invention, non-intertwinable links, i.e., rings or links initially without gaps for intertwining to form rope chains, may be arranged on a supporting mandril, with the gaps formed into such links as part of the contouring process. In other words, as the outer peripheries of the links are being contoured, a gap will be cut between the inner and outer peripheries of such links for intertwining with other links to form rope chains. Consequently, the contouring and the gap creation can be accomplished during a single manufacturing process, which reduces costs, improves efficiency and prevents the creation of a link initially provided with a gap, which can be a complexity when links are formed by stamping or punching.
The following detailed description is of the best mode or modes of the invention presently contemplated. Such description is not intended to be understood in a limiting sense, but to be an example of the invention presented solely for illustration thereof, and by reference to which in connection with the following description and the accompanying drawings one skilled in the art may be advised of the advantages and construction of the invention.
Intertwinable links used in the formation of jewelry rope chains are usually created using one of two well known methods. FIG. 1 illustrates one method that is well known in the art, where a solid or hollow wire 5 is first coiled around a support structure 7 and then a portion of such wire is sliced along the longitudinal axis of the support structure 7 to form individual wire segments, which segments are then flattened into intertwinable links. Another well known method of forming links is by stamping or punching, an example of which is shown in U.S. Pat. No. 5,544,477 to Rozenwasser.
FIG. 2 is a front view of a conventional link 10 used in the formation of rope chains, said link 10 having an outer periphery 12 of a predetermined shape, an inner periphery 14 of a predetermined shape, a gap 16 and a thickness 18. The outer periphery 12 of said link 10 is divided into a gap location 20 along which contouring is not useful, and a contouring surface 22 along which contouring is possible. Said link 10 may be formed from a solid or hollow wire 5 as is known in the art shown in FIG. 1, or may be formed by stamping or punching as is also known in the art. Other methods may also be used to form a link that is to be contoured in accordance with the methods of the present invention. Also, it will be understood that while wires and links of certain profiles and cross-sectional configurations are used herein for purposes of illustration herein, any shaped wire and any shaped link may be used.
The conventional link 10 of FIG. 2 used in the assembly of rope chains has certain noteworthy characteristics. First, the inner and outer peripheries 12 and 14 respectively have the same or similar shape. In FIG. 2, the link 10 has an annular configuration along its inner and outer periphery. Second, the thickness 18 of the link 10 is generally consistent from end to end. Contrary to convention, the links of the present invention, after they have been contoured in accordance with the teachings of the present invention, however, generally do not have consistent inner and outer peripheries, and generally do not have a consistent thickness throughout.
In accordance with one method of the present invention of forming chain links for assembly into rope chains, as shown in FIG. 3, a contouring apparatus 90 is drawn across, or is passed across the outer periphery 30 of the wire 5 while the wire 5 is supported on a support structure 7. One such support structure 7 might be an ice lathe as shown and as taught in U.S. Pat. No. 5,737,910 to Rozenwasser. Similarly, the contouring apparatus could be stationary, and the wire 5 passed thereby. The outer periphery 30 of the wire 5 is contoured, while the inner periphery 32 remains unaffected, or retains its original shape. Once the outer periphery 30 of the wire has been contoured as desired, the wire is separated into segments and flattened into chain links.
FIG. 4 is a front view of a link 25 produced in accordance with the method illustrated in FIG. 3. The link 25 has a plurality of grooves 34-38 along the outer periphery 30, a gap 40 and an inner periphery 32 that remains unaffected by the contouring apparatus 90. The gap 40 might be formed during the contouring operation by contouring the outer periphery 30 through to the inner periphery 32. The grooves 34-37 in FIG. 4 along one side of the outer periphery 30 have the same appearance, while the groove 38 along the other side has a different appearance. Consequently, the contouring operation does not have to be consistent along the entire outer periphery, although it could be if desired.
In accordance with another method of the present invention of forming chain links for assembly into rope chains, as shown in FIG. 5, a link 45 might be stamped or punched from a single sheet 50, with such link 45 having a contoured outer periphery 46 and an non-contoured inner periphery 47. The contouring can comprise a plurality of grooves 48,49 on opposite sides, which create a symmetrical appearance along the vertical axis through the center of the link. Several links 45, therefore, can be assembled into rope chains and other jewelry items that have inner and outer peripheries of different shapes or profiles. In accordance with yet another method of the present invention of forming chain links for assembly into rope chains, such links might also be die extruded or the like, having inner and outer peripheries of different shapes or profiles.
FIG. 6 is a front view of a link 60 used to illustrate another method of the present invention of forming chain links for assembly into rope chains. Link 60 has a non-contoured outer and inner periphery 62 and 64 respectively, a gap 66 and a thickness 68. In accordance with yet another method of the present invention of forming chain links for assembly into rope chains, the outer peripheries 62 of individual links 60 are contoured in unison by, for example, loading such links onto a mandril, which provides a support structure for group contouring.
FIG. 7 is an isometric view of a mandril 100 having an outer periphery 110 of a predetermined shape, that, for purposes of explanation, has a cross-section generally in the form of an inverted “T”, comprised of a primary support section 120 and an extended support section or protrusion 130. The mandril 100 also has a first end or edge 140 and a second end or edge 150, and may be rigid or flexible depending on the needs of the user. The mandril 100 is designed to support a single link 60 or a plurality of links slidably arranged thereon, for eventual passage of the link-loaded mandril through contouring apparatus.
FIG. 8 is an edge view illustration of link 60 situated about or arranged on a mandril 100, with the outer periphery 110 of mandril 100 designed to accommodate the inner periphery 64 of link 60, so that link 60 can slide along the outer periphery 110 of mandril 100. The support section 130 of mandril 100 extends or protrudes into the gap area 66 of the link 10, which section 130 further supports and centers the link 60 on the mandril 100. Again, while FIG. 8 illustrates for purposes of explanation a link having a generally rectangular inner periphery slidably arranged on a mandril having a generally rectangular outer periphery, it will be understood that both the mandril and the link may be designed using other shapes, so long as the link is capable of sliding along the outer periphery of the mandril and is supportably received thereon. The clearance 125 between the outer periphery 110 of the mandril 100 and the inner periphery 64 of the link 60 will generally be sufficient enough to permit sliding of the link 10 along the mandril, but not too great so that the link 60 wobbles or rocks from side to side on the mandril 100, or is rotatable on or around said mandril. In other words, movement of the link on or along the mandril is preferably restricted to the axial direction, i.e., along the axis of the mandril. It is not necessary, however, that the clearance 125 be the same between the link and the mandril on all sides of the mandril. Since a link-loaded mandril will be passed through contouring apparatus, such links should be sufficiently supported on the mandril so that such contouring of the outer periphery is consistent, and the clearance 125 between the mandril and the links arranged thereon, particularly adjacent the link section or sections being contoured, should not be great enough to frustrate the consistent contouring of the outer periphery of such links.
FIG. 9 is an isometric view of a plurality of links 60a-60g slidably arranged on a mandril 100. The links will generally be loaded along an entrance end 150 or edge of the mandril, and slid or extended to the opposite end 140, where such links will be prevented from sliding off the mandril using a stopping means or member 142 (see FIG. 10) coupled to or disposed at the end 140 of the mandril 100 opposite the entrance end 150. The stopping member 142, illustrated in FIG. 10, could take the form of a pin, wall or the like, and an equivalent stopping member could also be disposed at the entrance end of the mandril after the links have been arranged thereon to prevent such links from sliding off the entrance end of the mandril. Once links are arranged on a mandril, a hand tool may be drawn across the outer peripheries of such links to contour such outer peripheries as desired. Such hand tool may be used to cut, score, bend or otherwise deform the outer peripheries of such links until the desired surface configuration is achieved. The contouring operation does not, however, effect the contouring of the inner peripheries of such links.
Hand contouring can be somewhat difficult, particularly if the metal is hard or the desired outer periphery contour is intricate. Conventional contouring is usually accomplished by diamond-cutting contouring apparatus or by punches, presses or the like. FIG. 11 is a top, diagrammatic view of a mandril 100 with a plurality of links 60, arranged thereon, defined collectively as a link-loaded mandril 300, being passed through contouring apparatus 200 and 250. Similarly, the contouring apparatus could movably act upon a link-loaded mandril for contouring of the links, and it is not necessary that the link-loaded mandril be the moveable part that travels through the contouring apparatus. Contouring apparatus 200 and 250 may be cutters, shapers or the like, and act upon any portion of the outer peripheries, and preferably the contouring surface and not the gap location, of the links that are passed therethrough. For example, while FIG. 11 illustrates the contouring of opposite sides of the links, it will be appreciated that the upper and lower portions of the outer peripheries of the links may also be contoured, depending on the design of the contouring apparatus and the section of the links passed therethrough. Furthermore, while a pair of contouring apparatus 200 and 250 is shown, only one contouring apparatus, 200 or 250 for example, may be necessary if only one side of the outer periphery of the links are to be contoured, or, as illustrated in FIG. 12, if opposite sides are to be contoured in an identical manner and a link-loaded mandril 300 can be passed through such contouring apparatus once along each side of the mandril.
FIG. 13 is a top, diagrammatic view of a link-loaded mandril 300, showed representatively by a single line, being passed through three pairs or sets of contouring apparatus 200a-c and 250a-c. The first two pairs of contouring apparatus 200a,b and 250a,b, for example, might contour the sides of the outer peripheries of the links, while the third pair of contouring apparatus 200c and 250c, for example, might contour the upper and lower portions of the outer peripheries of the links. It will be appreciated, with particular reference to FIGS. 11 and 12, that the mandril upon which the links are loaded or arranged should preferably be flexible to allow a link-loaded mandril to pass through contouring apparatus if such passage occurs along a circuitous route. A flexible mandril also allows a link-loaded mandril to repeatedly pass through the same contouring apparatus so that different portions of the outer peripheries can be contoured, see FIG. 11, or to pass through different contouring apparatus arranged in a non-linear fashion as shown for example in FIG. 12.
While FIGS. 7-13 illustrate the use of a mandril for practicing the method of the present invention, other contouring apparatus may be used in a similar manner. For example, instead of using a mandril, groups of links might be arranged on an ice lathe, which is known in the art for contouring assembled chains, and then such links might be similarly frozen and contoured until the outer periphery assumes a desired appearance. Other supporting apparatus might be used to produce a similar desired effect.
FIGS. 14a-14bp illustrate a variety of individual link configurations capable of being produced in accordance with any of the methods of the present invention, each link having a uniquely and fashionably contoured outer periphery, with a non-contoured inner periphery, and a non-uniform thickness along at least one portion of the link as compared with other portions of the link. Such figures are only representative, and are by no means exhaustive of the possible contouring variations capable of being produced using the method of the present invention. Many of the links illustrated in FIGS. 14a-14bp have unique outer peripheral surface features. For example, some links have at least one concave surface 70 on at least one outer wall, while others have at least one flat surface 71. Other features present on at least one outer wall include at least one laterally tapering wall 72 toward one end of the outer periphery, an indent 73, a convex surface 74, an outer peripheral surface 75 that is parallel in profile to the adjacent inner peripheral surface, a protrusion 76 and a plurality of “C”-shaped indentations. Other features not specifically detailed above will also be apparent with reference to such figures. The outer peripheries can also be contoured so that the links appear symmetrical about the vertical axis as shown in FIG. 14a, or non-symmetrical about any axis as shown in FIG. 14d. Of course, the contouring possibilities are limitless. However, in each case, only the outer periphery is contoured without affecting the inner periphery. Another feature of all links shown in FIGS. 14a through 14bp is that the thickness of each link is not uniform in at least one portion of the link. FIGS. 14n and 14o in particular illustrate a simple rectangular link where the outer periphery has been contoured so that the thickness of the vertically extending portions 78 is different from the horizontally extending portions 79, while the profile of the inner periphery remains unchanged. Of course, while FIGS. 14n and 14o illustrate a symmetric outer peripheral contouring resulting in a non-uniform thickness throughout the link, such contouring could also be non-symmetric as shown in many of the links illustrated in FIGS. 14a through 14bp. Irrespective of the symmetrical nature of the outer peripheral contouring, the thickness along at least one portion of the perimeter of all of the links illustrated in FIGS. 14a through 14bp is not uniform, whereas a prior art link of FIG. 2, which would be assembled into a rope chain as is, i.e., without a contoured outer periphery, would have a uniform thickness 18 throughout.
FIG. 15 illustrates an edge view of a link 400 arranged on a mandril 500, where said link 400 has a continuous outer periphery 420 and a continuous inner periphery 430, with a thickness 450 defined therebetween. Link 400 is not initially capable of being intertwined with other links to form a rope chain as is known in the art, since such link has continuous inner and outer peripheries with no gap defined therein. However, in accordance with the method of the present invention and with particular reference to FIG. 16, a gap 440 may be formed in the link 400, for enabling said link 400 to intertwine with other links to form a rope chain, as part of the contouring step. In other words, a gap 440 may be contoured into or through the links using contouring apparatus 600 having a gap-creating contouring bit 610, while the remaining outer periphery of the links may be fashionably contoured as described in any of the above described methods. The contouring of the outer periphery of the links and/or the creation of a gap in a link having continuous inner and outer peripheries can occur simultaneously, or at different times, depending on the construction of the contouring apparatus acting upon a link-loaded mandril.
FIG. 16 illustrates the creation of a gap region 440 in a link 400 or a plurality of links loaded or arranged on a mandril as previously described. The mandril 500 of FIGS. 15 and 16 is not equipped with a protrusion akin to the protrusion 130 of mandril 100 described previously, for the obvious reason that the links 400 are not initially provided with a gap to accommodate such a mandril protrusion. Even though the links 400 are not initially created or provided with a gap, and the mandril 500 is not provided with a gap-extensive protrusion member, the links remain supported on the mandril 500 by the interaction between the outer periphery 510 of the mandril 500 and the inner periphery of the link or links 400, both before and after a gap is fashioned or contoured into the links. For example, the rectangular configuration of both the outer periphery of the mandril and the inner periphery of the link and the slidable clearance present therebetween when the links are arranged on the mandril, prevent the links from rotating or rocking or wobbling about the mandril, thereby assuring consistent contouring of the outer peripheries of the links. Other mandril and link shapes and cross sections will also be operative, so long as the mandril prevents the links from rotating about the mandril or otherwise jeopardizing the consistent contouring of the outer periphery of the links during passage through contouring apparatus.
Once the outer peripheries of the links have been contoured, which might or might not include the creation of a gap depending on whether or not the links have been provided with a gap, the links are removed from the mandril and assembled into rope chains as illustrated in FIG. 17. While the method of the present invention is particularly applicable to a method of forming links for use in rope chains, it will be understood that such links may be used for other purposes. For example, fashionably contoured links might be used to create other items of jewelry, such as earrings, bracelets, or the like, or such contoured links might be used in other areas of commerce not necessarily related to jewelry items.
While the present invention has been described at some length and with some particularity with respect to the several described embodiments, it is not intended that it should be limited to any such particulars or embodiments or any particular embodiment, but it is to be construed with references to the appended claims so as to provide the broadest possible interpretation of such claims in view of the prior art and, therefore, to effectively encompass the intended scope of the invention. Furthermore, the foregoing describes the invention in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the invention, not presently foreseen, may nonetheless represent equivalents thereto.

## Claims

1. A jewelry chain link suitable for intertwining with other jewelry chain links to form a jewelry chain comprising:
a) an inner periphery having an inner shape, an outer periphery having an outer shape, a thickness defined between said inner periphery and said outer periphery and a gap extending between said inner and outer peripheries for intertwining one jewelry chain link with another, and 
b) a centerline plane defined through said gap, 
c) said outer periphery including first and second outer peripheral edges on opposite sides of said centerline plane and a connecting edge opposite said gap and disposed between said first and second outer peripheral edges, each outer peripheral edge having at least one concave edge surface, 
d) said first outer peripheral edge having a first outermost dimension measured along a first lateral plane extending perpendicularly from said centerline plane, 
e) said second outer peripheral edge having a second outermost dimension measured along a second lateral plane extending perpendicularly front said centerline plane, and 
f) said first outermost dimension differing from said second outermost dimension, 
g) wherein said at least one concave edge surface associated with said first outer peripheral edge has an arc radius that differs from said at least one concave edge surface associated with said second outer peripheral edge.

2. A jewelry chain link in accordance with claim 1, wherein said first outer peripheral edge differs in contour from said second outer peripheral edge.

3. A jewelry chain link in accordance with claim 1, wherein said inner shape differs from said outer shape.

4. A jewelry chain link in accordance with claim 1, further comprising only one concave surface in one of said outer peripheral edges.

5. A jewelry chain link in accordance with claim 1, further comprising at least one convex surface in one of said outer peripheral edges.

6. A jewelry chain link in accordance with claim 1, further comprising at least one indented surface in one of said outer peripheral edges.

7. A jewelry chain link in accordance with claim 1, further comprising at least one sawtooth surface in one of said outer peripheral edges.

8. A jewelry chain link in accordance with claim 1, further comprising at least one protruding surface in one of said outer peripheral edges.

9. A jewelry chain link in accordance with claim 1, wherein said jewelry chain link has a non-uniform thickness.

10. A jewelry chain link in accordance with claim 1, wherein said first and second planes are different.

11. A jewelry chain link in accordance with claim 1, wherein said first plane extends along a diameter of said link.

12. A jewelry chain link in accordance with claim 11, wherein said first and second planes are different.

13. A jewelry chain formed from intertwining jewelry chain links, each of said jewelry chain links comprising:
a) an inner periphery having an inner shape, an outer periphery having an outer shape, a thickness defined between said inner periphery and said outer periphery and a gap opposite extending between said inner and outer peripheries for intertwining one jewelry chain link with another, and 
b) a centerline plane defined through said gap, 
c) said outer periphery including first and second outer peripheral edges on opposite sides of said centerline plane and a connecting edge opposite said gap and disposed between said first and second outer peripheral edges, each outer peripheral edge having at least one concave edge surface, 
d) said first outer peripheral edge having a first outermost dimension measured along a first lateral plane extending perpendicularly from said centerline plane, 
e) said second outer peripheral edge having a second outermost dimension measured along a second lateral plane extending perpendicularly from said centerline plane, and 
f) said first outermost dimension differing from said second outermost dimension 
g) wherein said at least one concave edge surface associated with said first outer peripheral edge has an arc radius that differs from said at least one concave edge surface associated with said second outer peripheral edge.

14. A jewelry chain in accordance with claim 13, wherein said first outer peripheral edge differs in contour from said second outer peripheral edge.

15. A jewelry chain in accordance with claim 13, wherein said inner shape differs from said outer shape.

16. A jewelry chain in accordance with claim 13, further comprising only one concave surface in one of said outer peripheral edges.

17. A jewelry chain in accordance with claim 13, further comprising at least one convex surface in one of said outer peripheral edges.

18. A jewelry chain in accordance with claim 13, wherein said jewelry chain link has a non-uniform thickness.

19. A jewelry chain in accordance with claim 13, wherein said first and second planes are different.

20. A jewelry chain in accordance with claim 13, wherein said first plane extends along a diameter of said link.

21. A jewelry chain in accordance with claim 20, wherein said first and second planes are different.

22. A method of producing jewelry chains comprising the steps of:
a) providing a jewelry chain link having: 
i. an inner periphery having an inner shape, an outer periphery having an outer shape, a thickness defined between said inner periphery and said outer periphery and a gap extending between said inner and outer peripheries for intertwining one jewelry chain link with another, and 
ii. a centerline plane defined through said gap, 
iii. said outer periphery including first and second outer peripheral edges on opposite sides of said centerline plane and a connecting edge opposite said gap and disposed between said first and second outer peripheral edges, each outer peripheral edge having at least one concave edge surface, 
iv. said first outer peripheral edge having a first outermost dimension measured along a first lateral plane extending perpendicularly from said centerline plane, 
v. said second outer peripheral edge having a second outermost dimension measured along a second lateral plane extending perpendicularly from said centerline plane, and 
vi. said first outermost dimension differing from said second outermost dimension, and 

b) intertwining said jewelry chain link with other jewelry chain links to form a jewelry chain 
c) wherein said at least one concave edge surface associated with said first outer peripheral edge has an arc radius that differs from said at least one concave edge surface associated with said second outer peripheral edge.

23. A method of producing jewelry chains in accordance with claim 22, wherein said first outer peripheral edge differs in contour from said second outer peripheral edge.

24. A method of producing jewelry chains in accordance with claim 22, wherein said inner shape differs from said outer shape.

25. A method of producing jewelry chains in accordance with claim 22, wherein said jewelry chain link is provided by stamping.

26. A method of producing jewelry chains in accordance with claim 22, wherein said jewelry chain link is provided by segmenting a wire coiled on a support.

27. A method of producing jewelry chains in accordance with claim 22, wherein the outer peripheral edges of multiple jewelry chain links are shaped by arranging said jewelry chain links on a support and contouring the outer peripheral edges of said jewelry chain links.

28. A method of producing jewelry chains in accordance with claim 22, wherein said jewelry chain links are intertwined to form a jewelry rope chain.