Patent · US Active

Method of separating excess lens forming material from a molded ophthalmic lens, in particular a contact lens

US8673187B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Axel Heinrich · Aschaffenburg, DE
Bernhard Seiferling · Goldbach, DE
Peter Hagmann · Erlenbach a.Main, DE

Key dates

Filing date	Dec 16, 2010
Grant date	Mar 18, 2014
Priority date	—
Expiry date	Dec 4, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2011/0041
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

There is described a method of separating excess lens forming material from a molded ophthalmic lens, in particular a contact lens. After polymerization and/or cross-linking of a lens forming material (P) within a mold cavity (4) of a mold (1) comprising female and male mold halves (2, 3) to form an ophthalmic lens non-polymerized and/or non-cross-linked lens forming material is flushed away from the mold halves (2, 3) with a jet of a fluid flushing medium, such as, e.g., water or a solvent or an inert gas. Subsequently the molded lens is dried. In accordance with the invention the flushing is accomplished with the mold halves (2, 3) still in the closed position. There is also described an apparatus for carrying out the method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.