Essilor International (compagnie Generale D'optique)

Patrick Herbin

Jean-Claude Lacroix

Jean-Marc Padiou

Laurent Marcepoil

Jean-Marie Keller

Jean-Claude Lacrois

A locking device includes a rigid base () and a deformable pocket () containing a granular material (). Discharging elements () are provided for gas exchange between the inside and the outside of the deformable pocket ().

Device for blocking optical elements

Tool for surfacing an optical surface

A roll of composite tape composed of an adhesive tape and a strippable backing tape is paid out, and the adhesive tape and the strippable tape are separated. A circular hole of predetermined diameter is punched through the strippable tape, and the strippable tape and the adhesive tape are brought back together again such that a circular portion of the adhesive face of the adhesive tape remains exposed through the circular hole punched in the strippable tape. The exposed portion of the adhesive face of the adhesive tape is applied against a face of a lens placed on a support by displacing at least one of the support and a buffer toward each other. A cutting device is used to cut the adhesive tape around the peripheral edges of the lens, and the lens is removed together with its cut-out portion of adhesive tape. The remaining portion of the adhesive tape and the punched strippable tape is also removed, and the above operations are repeated for each lens in a series of lenses.

Apparatus for applying a protective film on one face of a series of

In this blocking apparatus, at least a portion of the pipe connecting the inlet orifice of the mold to the outlet orifice of the tank containing molten metal is in thermal contact with the mold, which mold includes at least one channel through which a cooling fluid can be caused to flow. Heater means are also associated with the pipe. Thus, the flow of molten metal from the tank into the mold can be stopped by allowing a plug of solidified metal to form in the pipe when the mold is cooled, and the flow of molten metal can be re-established by melting the plug of solidified metal by use of the heater means.

Method and apparatus for fixing a metal block on a face of an ophthalmic

The cylindrical side wall of the mold cavity (8) has an inside diameter (D) which is greater than the largest existing ophthalmic lens diameter, and a generally cylindrical membrane (25) of elastomer material is disposed concentrically inside the mold cavity so that in conjunction with the cylindrical side wall of the cavity it defines a variable volume annular chamber (31), the membrane being expansible and retractable radially under the action of a fluid which is alternatively removed from and admitted to the annular chamber.

Mold for fixing a metal block on one of the faces of an ophthalmic lens

This tool whose shape adapts automatically to the surface of an ophthalmic lens is suitable for use as a polisher or as an applicator buffer. It comprises a rigid support (2) having a cavity (5) in one of its faces, together with a buffer (1) constituted by two elastically deformable membranes (7 and 8) which are fixed at their peripheral edges to the side walls of the cavity (5) at a distance from the bottom thereof, thereby defining a space (9) between the membranes which is filled with an incompressible material (11) consituted by small-size grains, with the support (2) including a passage (12) having one end opening out into said space (9) and having its other end connectable to a vacuum source (15).

Tool whose shape adapts automatically to the surface of an ophthalmic

A roll of composite tape comprising an adhesive tape and a strippable backing tape is paid out and the adhesive tape and the strippable tape are separated. A hole of predetermined diameter is punched through the strippable tape and the strippable tape and the adhesive tape are brought back together again such that a circular portion of the adhesive face of the adhesive tape remains exposed through the hole punched in the strippable tape. The exposed portion of the adhesive face of the adhesive tape is applied against a face of a lens placed on a support by displacing at least one of the support and a buffer towards each other. A cutting device is used to cut the adhesive tape around the peripheral edges of the lens and the lens is removed together with its cut-out portion of adhesive tape. The remaining portion of the adhesive tape and the punched strippable tape is also removed, and the above operations are repeated for each lens in a series of lenses.

Growing community of inventors

Morlaincourt, France

Patrick Herbin