FR2779922A1 - Ornamental necklace assuming flat, non-pleated form on the wearer - Google Patents

Abstract

Each metal thread (5) has spiral form and is interconnected with adjacent thread to form the necklace. The diameter of each spiral increases as the spiral length increases, so that the necklace can assume a flat position on the user. When fully connected an inner and outer diameter of necklace is achieved. The spirals are formed on a mandrel with conical section, using interleaved spacer bar.

Description

- 1 -2779922

  The present invention relates to an ornamental necklace comprising a strip of metallic fabric having the appearance of Milanese fabric comprising threads each wound along an axis, arranged

  side by side and whose coils are nested.

  French patent application FR-A-2 115 576 and French patent application FR-A-2 233 009 describe methods for manufacturing Milanese fabric composed of helically wound threads

around parallel axes.

  The collars made of Milanese fabric are worn like a dog collar because the small clearance between the coils makes it necessary to respect as much as possible the parallelism between the axes

  winding of the threads under pain of forming unsightly folds.

  The subject of the present invention is a new necklace which can be worn differently while presenting the appearance of the fabric.

Milanese.

  The collar according to the invention is characterized in that the dimensions of the turns from one end to the other of a wire are variable for at least part of the wires and are chosen so that the spacing between the axes wires is weaker at the radially inner edge of the collar than at its

radially outer edge.

  Thanks to the invention, the collar can be worn flat on the

  chest without forming an unsightly fold.

  In a particular embodiment, at least a portion of the wires and preferably all of the wires are wound in a spiral. The radius of the turns then increases linearly with the distance from the center of the collar. The diameter of the turns varies for example between 2 mm and 4 mm

  and preferably between 2.5 mm and 3.5 mm.

  Each wire has for example a circular section with a diameter between 0.3 mm and 0.8 mm and preferably close

0.5 mm.

  The winding pitch of each wire is between 2 mm and

  3 mm for example, and preferably is close to 2.5 mm.

  The number of turns of each wire is between ten

and thirty for example.

  In an alternative embodiment, the turns have, when observed in the axis of the wire, an oval shape more and more

-2 - 2779922

  stretched out in the direction of the necklace as you go

  closer to the radially outer edge of the collar.

  The invention also relates to a method for manufacturing a collar as defined above, characterized in that it comprises the step or steps consisting in: winding a wire on a conical mandrel, driven in rotation, with guidance of the wire by means of a stationary tape in rotation whose width defines the winding pitch, or alternatively: -winding a wire on a cylindrical mandrel of revolution, driven in rotation, with guide of the wire by means of a stationary tape in rotation whose width defines the winding pitch, -assemble the wires so as to constitute a strip of Milanese fabric, -make the turns oval by crushing more strongly the strip of metallic fabric on the side of the radially outer edge of the collar

  only on the side of its radially inner edge.

  The invention will be better understood on reading the

  detailed description which follows, of an exemplary embodiment not

  limiting, and on examining the appended drawing in which: - Figure 1 schematically represents a portion of collar according to the invention, - Figure 2 represents in isolation one of the wires constituting the collar of Figure 1, - Figure 3 illustrates the shaping of the wire, and - Figure 4 illustrates the nesting of the turns within the fabric. The collar 1 partially shown in FIG. 1 comprises a strip of metallic fabric of which only one has been drawn.

sector 4.

  This sector 4 has, in the example of embodiment described, a radially inner edge 2 circular with center C and radius Rint and a radially outer edge 3 also circular with center C and radius R. ext The fabric strip is formed by wires 5 each wound in a spiral along an axis coincident with a radius starting from the center C. The wires are arranged side by side and their turns are

  nested as will be described later.

  There is shown in isolation in Figure 2 a wire 5 of axis X. The shaping of this wire 5 is carried out as illustrated in Figure 3, by winding it on a conical mandrel 6 rotated, with a pitch constant P equal in the embodiment described at

2.6 mm.

  The wire 5 has a circular section with a diameter of 0.5 mm.

  The diameter D of the last turn at the end 7 located at the radially outer edge 3 of the collar is 3.4 mm and that at the end 8 located at the radially inner edge 2

  is 3.4 mm in the example of embodiment described.

  To ensure a constant spacing between the turns, the wire is guided by means of a ribbon 9 of constant width equal to the pitch P,

kept stationary in rotation.

  The operator maintains the tension of the wire 5 during winding. The ribbon 9 moves axially on the axis of the mandrel 6 under

  the effect of the push of the first turns.

  The son 5 thus shaped are screwed into each other in the same manner as is known for making the Milanese fabric. FIG. 4 shows four wires 5 at the turns

  nested within each other.

  The two-by-two assembly of the wires 5 at the radially inner edge 2 and at the radially outer edge 3 of the collar is carried out in a conventional manner and will not be described

  for the sake of clarity of the presentation.

  Thanks to the invention, a collar can be obtained, the axes of the wires 5 of which are arranged like the radii of a circle with center C, as has just been described or, as a variant, like the generatrices of a cone with vertex C, depending on whether the necklace is made so that

  that it rests without making a fold on a plane or on a cone.

  In an alternative embodiment not shown, the wires 5 are wound on a cylindrical mandrel of revolution and assembled from

  conventional way to form a strip of Milanese fabric.

  Then, the turns of the wires 5 are made oval by crushing the collar more strongly at its radially outer edge 3 than at its radially inner edge 2, so that the turns present, when observed according to the axis of the wires, an increasingly elongated shape in the direction of the collar as and

  as we get closer to the radially outer edge.

  The strip of Milanese fabric can be crushed, for example by passing it between two rotating cylinders

  whose axes of rotation make an angle between them.

Claims (9)

  1. Ornamental necklace comprising a strip of metallic fabric having the appearance of Milanese fabric, comprising threads each wound along an axis, arranged side by side and whose turns are nested, characterized in that the dimensions turns from one end to the other of a wire (5) are variable for at least some of the wires and are chosen so that the spacing between the axes of these wires is less at the edge radially inside (2) of the collar only at its edge radially outer (3).   2. Collar according to claim 1, characterized in that the radius of the turns of each wire (5) increases linearly with the distance to the center of the necklace.   3. Necklace according to any one of the claims   previous, characterized by the fact that the diameter of the turns changes   between 2 mm and 4 mm and preferably between 2.5 mm and 3.5 mm.   4. Necklace according to any one of the claims   above, characterized in that each wire has a circular section and a diameter between 0.3 mm and 0.8 mm and of preferably around 0.5 mm.   5. Necklace according to any one of the claims   previous, characterized by the fact that the winding pitch of the wires is between 2 mm and 3 mm.   6. Necklace according to any one of the claims   above, characterized in that the axes of the wires are   arranged like the rays of a circle.   7. Necklace according to any one of claims 1 to 5,   characterized by the fact that the axes of the wires are arranged like the generators of a cone.   8. Necklace according to claim 1, characterized in that the turns have, when observed in the axis of the wire, an oval shape which is increasingly elongated in the direction of the collar as and   as we get closer to the radially outer edge of the collar.   9. A method of manufacturing a collar, characterized in that it comprises the step or steps consisting in: - winding a wire on a conical mandrel (6), driven in rotation, with guide of the wire by means of a ribbon stationary in rotation whose width defines the winding pitch, -G 2779922   or alternatively: -winding a wire on a cylindrical mandrel of revolution, driven in rotation, with guiding of the wire by means of a stationary tape in rotation whose width defines the winding pitch, -assemble the wires so as to constitute a strip of Milanese fabric - make the turns oval by crushing the strip of metallic fabric more strongly on the side of the radially outer edge of the collar   only on the side of its radially inner edge.