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AssigneeNovartis AG
InventorsAxel Heinrich, Bernhard Seiferling, Peter Hagmann
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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.
A method of separating excess lens forming material from a molded ophthalmic lens, comprising the steps of dosing a lens forming material into a mold cavity of a mold comprising female and male mold halves, applying energy to polymerize and/or crosslink the lens forming material, and then flushing from the mold halves non-polymerized and/or non-cross-linked lens forming material with a jet of a fluid flushing medium, wherein for the flushing of the mold halves the flushing medium is injected into a peripheral zone of the mold cavity through a feed channel, and wherein the flushing medium together with the excess lens forming material is discharged through a discharge channel;
Dependencies are inferred from the claim text.