An ink jet printing system for printing colored images on...

B - Operations – Transporting – 41 – J

Patent

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B41J 3/407 (2006.01)

Patent

CA 2464840

The present invention provides a method for making colored contact lenses and an apparatus for implementing the method of the invention. The apparatus of the invention comprises a securing means for holding a contact lens or a portion of a mold for making the contact lens, a printer head, wherein the printer head comprises one or more nozzles each of which is capable of jetting droplets of color liquid independent of each other under control of a computer system; a positioning means for precisely positioning the printer head at each of a plurality of predetermined positions, one at a time, on a surface of the contact lens or the mold portion under control of the computer system. The method and apparatus of the invention are useful for producing colored contact lenses having high quality color images thereon.

La présente invention porte sur un procédé de fabrication de lentilles de contact colorées et sur un appareil permettant d'exécuter ce procédé. L'appareil comprend un dispositif de fixation destiné à retenir une lentille de contact ou une partie d'un moule de fabrication de la lentille, une tête d'impression comprenant une ou plusieurs buses pouvant chacune éjecter des gouttelettes de liquide coloré indépendantes les unes autres, et cela, sous la commande d'un système informatique ; un positionneur permettant de positionner avec précision la tête d'impression au niveau de chacune des pluralités de positions prédéfinies, une à la fois, sur une surface de la lentille de contact ou de la partie du moule sous la commande du système informatique. Le procédé et l'appareil de l'invention sont utiles pour produire des lentilles de contact colorées sur lesquelles sont imprimées des images couleur de haute qualité.

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