The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 1979
Filed:
Jul. 25, 1977
Edward A Travnicek, Southbridge, MA (US);
American Optical Corporation, Southbridge, MA (US);
Abstract
Casting a contact lens directly to finished size, shape and edge configuration. Casting is accomplished between concave and convex mold halves which respectively provide lens front and base curve forming surfaces. The rim of the concave front-forming surface is circular and makes continuous line contact with a spherical surface extended annularly about the convex base curve-forming surface to produce a vanishing thin edge without flashing about the cast lens. Provision is made for modification of the cross-sectional configuration of the circular rim and/or annular mold surface according to changes in lens edge profile needed to meet particular requirements for optimum lens fitting comfort.