Apparatus for and method of edge machining flexible contact lenses

Abstract

Abstract GAGING A SLURRY COATED POLISHING PAD. A NOVEL METHOD FOR PREPARING THE HYDROPHILIC LENS FOR POLISHING COMPRISES THE STEPS OF FLOATING THE LENS ON THE FLUID FILLED CHAMBER, CENTERING THE LENS CONCENTRICALLY WITH THE SUPPORT SPINDLE AXIS, CONCENTRICALLY CLAMPING THE LENS UPON THE SPINDLE AND ROTATING THE SPINDLE TO CENTRIFUGALLY DISPLACE AT LEAST SOME FLUID FROM THE LENS AND THEREBY CONDITION THE LENS FOR CONTOURING OF ITS EDGE. A MACHINE FOR CENTERING A HYDROPHILIC LENS BETWEEN ROTATABLE SPINDLES RO ENGAGE A POLISHING PAD FOR CONTOURING THE EDGE OF THE LENS COMPRISES A ROTATABLE SPINDLE HAVING AN EXTENSIBLE SLEEVE CONCENTRICALLY DISPOSED ABOUT IT FOR RAISING TO FORM A CHAMBER FOR HOLDING A FLUID FOR FLOATING AND CENTERING A HYDROPHILIC LENS. A CLAMPING SPINDLE IS PROVIDED FOR ENGAGING AND MOVING THE HYDROPHILIC LENS AGAINST THE ROTATABLE SUPPORT SPINDLE AND TO THEREAFTERL COOPPERATIVELY SPIN THE LENS TO DISPLACE FLUIDS THEREFROM TO CONDITION THE EDGE OF THE LENS FOR CONTOURING BY EN-

Inventors

• 👤 I Schrier

Bibliographic Details