Injection molded paired thermoplastic spectacle lenses suited for fully automated dip hardcoating
January 20, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of coating articles Apparatus for injection molding lenses Apparatus for coating articles Method for molding ophthalmic lenses Coating process Injection molding equipment and method Mold for optical thermoplastic high-pressure molding Method for injection molding articles Fabrication of thermoplastic optical components by injection/compression molding Apparatus for injection molding articles InventorsAssigneeApplicationNo. 009151 filed on 01/20/1998US Classes:264/40.5, Positioning of a mold part to form a cavity or controlling pressure of a mold part on molding material264/2.2, Changing mold size or shape during molding or with shrinkage compensation264/2.3With mold adherence or releaseExaminersPrimary: Dang, Hung XuanForeign Patent References
International ClassB29D 011/00AbstractPlastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses (16) are suitable to be robotically dip hardcoated. Special spring-loaded (25, 26) molds having variable-volume mold cavities are used in an injection-compression molding process to form, without parting line flash, pairs of a wide range of differing optical power of polycarbonate Rx spectacle lenses (16). These pairs have special molded-on design features which are specially suited for full automation, starting with a novel way for ejection out of the mold into a takeout robot which is integrated via full automation with subsequent dip hardcoating. A molded-on tab with each pair of lenses is specially suited for manipulation by SCARA type robot. This combination produces micro-clean hardcoated paired molded lens made entirely within a single continuous cleanroom air enclosure surrounding the lenses, without any human operators therein, nor requiring any cutting or trimming of the molded paired lens or runner system before hardcoating, nor use of Freon (tm) CFC nor aqueous cleaning protocols before dipcoating.Other References
Field of SearchSPECTACLES AND EYEGLASSESCombined With antiglare or shading Positioning of a mold part to form a cavity or controlling pressure of a mold part on molding material Changing mold size or shape during molding or with shrinkage compensation With mold adherence or release OPTICAL ARTICLE SHAPING OR TREATING | |
