Device for clamping an ophthalmic lens

Abstract

A device for clamping an ophthalmic lens for edging it includes a driving abutment including a central peg extended externally by an elastically deformable flange.

1 . A device for clamping an ophthalmic lens for edging it, which device includes a driving abutment including a relatively deformable central peg extended externally by a semi-rigid elastically deformable material flange and at least said flange is conformed to have an application surface adapted to come into contact with said lens and to be deformed to espouse the shape thereof by flexing freely due to the effect of a clamping force applied to said abutment.  
     
     
         2 . The device claimed in  claim 1 , wherein a peripheral part of said application surface is part of said flange and its more central part is part of said peg.  
     
     
         3 . The device claimed in  claim 1 , wherein said application surface is covered with a thin plastics material or elastomer material facing.  
     
     
         4 . The device claimed in  claim 3 , wherein the thickness of said thin facing is of the order of 1 to 2 mm.  
     
     
         5 . The device claimed in  claim 3 , wherein said thin facing is made of flexible PVC.  
     
     
         6 . The device claimed in  claim 3 , wherein said thin facing is made of neoprene.  
     
     
         7 . The device claimed in  claim 1 , wherein said application surface includes an adhesive layer.  
     
     
         8 . The device claimed in  claim 1 , wherein a driving abutment adapted to cooperate with the rear face of an ophthalmic lens has a substantially plane surface in the unstressed state.  
     
     
         9 . The device claimed in  claim 1 , wherein a driving abutment adapted to cooperate with the front face of an ophthalmic lens has a concave surface in the unstressed state.  
     
     
         10 . The device claimed in  claim 1 , wherein said driving abutment flange has an oblong contour.  
     
     
         11 . The device claimed in  claim 1 , wherein said flange and said peg are made in one piece from the same material.  
     
     
         12 . The device claimed in  claim 11 , wherein said material is polyoxymethylene.  
     
     
         13 . The device claimed in  claim 12 , wherein the thickness of said flange is of the order of 1.5 mm.