Method of generating a toric surface on a molding tool

Details Method of generating a toric surface on a molding tool Method of generating a toric surface on a molding tool

1992-09-29

1993-12-14

Kisliuk, Bruce M.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51323, B24B 100

Patent

active

052691055

ABSTRACT:
An improved method for generating a toric surface on a molding tool for forming contact lens molds comprises: providing a tool which comprises an elongated body and a molding portion at one end of the tool, wherein the molding portion comprises a surface which is substantially spherical; applying a force to the elongated body so as to distort the spherical surface of the molding portion; machining a substantially spherical curve in the distorted surface while maintaining the applied force; and releasing the applied force, wherein the spherically cut surface assumes a toric shape upon release of the applied force.

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