Contact lens mold assemblies and systems and methods of...

B - Operations – Transporting – 29 – D

Patent

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B29D 11/00 (2006.01)

Patent

CA 2618674

Methods and apparatus are provided for making an ophthalmic lens. Apparatus are provided for filling contact lens shaped cavities of contact lens molding assemblies. Methods of coupling and fusing contact lens mold sections are also provided and generally include providing first and second mold sections which when coupled together are effective to form a lens-shaped cavity and contact regions between the mold sections. One or both of the mold sections may include one or more recessed regions or projections which provide areas of non- fusion and areas of fusion, respectively, when the mold sections have been filled with a contact lens precursor material and are fused together, for example, by means of focused ultrasound energy.

L'invention porte sur des procédés et des appareils destinés à la fabrication d'une lentille ophtalmique. Les appareils de l'invention permettent de remplir des cavités en forme de lentille de contact d'ensembles de moulage de lentilles de contact. L'invention se rapporte également à des procédés permettant de coupler et de fusionner des sections de moule de lentille de contact, qui consistent généralement à former une première et une seconde section de moule qui, lorsqu'elles sont couplées entre elles, forment une cavité en forme de lentille et des régions de contact entre les sections de moule. Une section de moule ou les deux sections de moule peuvent comprendre au moins une région en creux ou en saillie constituant des zones de non fusion ou de fusion, respectivement, lorsque les sections de moule ont été remplies d'un matériau précurseur de lentille de contact et sont fusionnées entre elles au moyen, par exemple, d'une énergie ultrasonore focalisée.

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