Contact lens molds and systems and methods for producing same

Details Contact lens molds and systems and methods for producing same Contact lens molds and systems and methods for producing same

B - Operations, Transporting

29

C

B29C 33/42 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2618593

Contact lens molds and systems and methods for producing contact lens molds are described. The contact lens mold sections include two optical quality surfaces, a flange circumscribing at least a portion of the two optical quality surfaces, and an elongate member extending from the flange. Two mold sections can contact one another to form a mold assembly having a contact lens shaped cavity. The mold sections are structured to form a contact lens having an edge that does not require further physical modification before placement on an eye. Systems and methods are described which direct a molten polymeric material into cavities corresponding to the mold sections.

La présente invention concerne des moules pour verres de contact et des systèmes et procédés de production de ceux-ci. Les sections de moule pour verres de contact incluent deux surfaces de qualité optique, un rebord délimitant au moins une partie des deux surfaces de qualité optique, et un élément allongé se prolongeant à partir du rebord. Deux sections de moule peuvent entrer en contact l'une avec l'autre afin de former un ensemble de moule comportant une cavité en forme de verre de contact. Les sections de moule sont structurées afin de former un verre de contact comportant un bord qui ne requiert aucune modification physique ultérieure avant sa mise en place sur un AEil. L'invention concerne des systèmes et procédés qui dirigent un matériau polymérique fondu à l'intérieur de cavités correspondant aux sections de moule.

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