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US 3,971,163 AGranted
Abrasive tape apparatus for contouring a flexible lens
AssigneeDow Corning Corporation
InventorsWayne E. Trombley, Lawrence R. Jacobson
Life of this patent
Estimating the term…
Abstract
This is a method and apparatus for machining a flexible silicone contact lens which utilizes a moving, flexible abrasive tape bearing against the rotating lens to accomplish the desired result. The tape travels in a transverse direction across the lens and may be oscillated to provide a more uniform finish.
Claims1
An apparatus for machining an article formed of a non-rigid material comprising an abrasive tape having an article engaging area, abrasive tape carrying and moving means including means for oscillating the article engaging area of the abrasive tape through an arc;
- and article holding means having means for moving the article into engagement with the abrasive tape, the tape being unsupported except at points spaced from the article engaging area during engagement of the article with the tape.
Dependencies are inferred from the claim text.