Ornamental device comprising a stone

Abstract

The invention relates to an ornamental device ( 1 ) comprising at least one cut or polished stone ( 2 ) with at least one rear portion ( 23 ). This ornamental device ( 1 ) is characterised by 5 the fact that it also has: means ( 3 ) to at least partially protect the rear portion ( 23 ) of the stone ( 2 ) from becoming soiled. This means of protection ( 3 ) takes on the shape of this rear portion ( 23 ) of the stone ( 2 ) and equips this rear portion ( 23 ) of the stone ( 2 ) without adhering to it; means ( 5 ) to prevent the ingress of a body from between the rear portion ( 23 ) of the stone ( 2 ) and the means ( 3 ) for protecting this rear portion ( 23 ) of the stone ( 2 ) and/or to prevent the egress of such a body from a defined internal volume ( 4 ) between the rear portion ( 23 ) of the stone ( 2 ) and the means ( 3 ) for protecting this rear portion ( 23 ) of the stone ( 2 ); Means for securing, on the stone ( 2 ), means ( 3 ) for protecting the rear portion ( 23 ) of this stone ( 2 ). The invention also concerns a manufacturing process of such an ornamental device ( 1 ).

1 . Ornamental device comprising a cut or polished stone with a rear portion and characterised by the fact that it further comprises:
 Means to partially protect the rear portion of the stone from becoming soiled. This means of protection takes on the shape of this rear portion of the stone and equips this rear portion of the stone without adhering to it;   Means for preventing the ingress of a body between the rear portion of the stone and the means for protecting this rear portion of the stone or to prevent the egress of such a body from the defined internal volume between the rear portion of the stone and the means for protecting the rear portion of the stone;   Means for securing, on the stone, the means for protecting the rear portion of this stone.   
     
     
         2 . Ornamental device according to  claim 1 , characterised by the fact that the means for protecting the rear portion of the stone has a wall whose thickness is between 0.001 mm and 1 mm, preferably between 0.005 and 0.1 mm, specifically, approximately 0.01 mm. 
     
     
         3 . Ornamental device according to  claim 1  characterised by the fact that the means for protecting the rear portion of the stone includes a natural, synthetic or polymer, specifically a synthetic polymer, material. 
     
     
         4 . Ornamental device according to  claim 1 , characterised by the fact that the stone has a rear portion that takes on the shape of a flat face and that the means for protecting this rear portion of this stone comprises a flat plate fitted to this flat face. 
     
     
         5 . Ornamental device according to  claim 1 , characterised by the fact that the stone has a rear portion that takes on the shape of a pavilion and that the means for protecting this rear portion of this stone comprises a cap fitted to this pavilion, and inside of which this pavilion is positioned. 
     
     
         6 . Ornamental device according to  claim 1 , characterised by the fact that, in the inner volume, either there is a vacuum or it contains a gas or gas mixture, in particular, composed of air. 
     
     
         7 . Ornamental device according to  claim 1 , characterised by the fact that the means to prevent the ingress or egress of a body has a sealng gasket extending along the entire perimeter of the means for protecting the rear portion of this stone, and, as appropriate, interposed between the stone and the means for protecting the rear portion of the stone or positioned straddling the stone and the means for protecting the rear portion of the stone. 
     
     
         8 . Ornamental device according to  claim 1 , characterised by the fact that the means for securing, on the stone, the means for protecting the rear portion of the stone is comprised of means to prevent the ingress or egress of a body, using a dot of glue, or a melted portion of the wall of the means for protecting the rear portion of this stone. 
     
     
         9 . Manufacturing process for an ornamental device with a polished or cut stone that has a rear portion, characterised by the fact that:
 The rear portion of the stone is equipped with means to partially protect this rear portion of the stone from becoming soiled. This means takes on the shape of this rear portion of the stone and equips this rear portion of the stone without adhering to it;   The stone or the means for protecting the rear portion of the stone are equipped with means preventing the ingress of a body between the rear portion of the stone and the means for protecting this rear portion of the stone or preventing the egress of such a body from a defined inner volume between the rear portion of the stone and the means for protecting this rear portion of the stone;   Means for protecting the rear portion of this stone is secured on this stone.   
     
     
         10 . Manufacturing process for an ornamental device according to  claim 9 , characterised by the fact that, when the rear portion of the stone is equipped with means for protecting this rear portion, a plate or a film comprising a material used in the composition of this means for protecting the rear portion of the stone is formed directly on the stone by creating a vacuum or thermoforming. 
     
     
         11 . Manufacturing process for an ornamental device according to  claim 9 , characterised by the fact that, when the rear portion of the stone is equipped with means for protecting this rear portion, a material used in the composition of these means for protecting this rear portion of the stone is either sprayed directly onto the stone, or this stone is dipped in a bath comprising such a material. 
     
     
         12 . Manufacturing process for an ornamental device according to  claim 9 , characterised by the fact that means for protecting the rear portion of this stone is secured on the stone, or the stone or the means for protecting the rear portion of the stone is equipped with means to prevent the ingress or egress of a body, either by interposing a sealing gasket between the stone and the means for protecting the rear portion of the stone, or by placing such a sealing gasket straddling the stone and the means for protecting the rear portion of the stone.