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| Number | Title | Issue Date |
| 6290882 | Reduced-knitline thermoplastic injection molding using multi-gated non-sequential-fill method and apparatus, with a heating phase and a cooling phase in each molding cycle Hard to fill large-surface-area parts and/or thinwalled configurations of optical lenses and reflective optical elements are among the difficult-to-mold thermoplastic products which require precision replication of the molding surfaces, in micro detail. W... | 09/18/2001 |
| 6024902 | Injection molded paired thermoplastic spectacle lenses suited for fully automated dip hardcoating Plastic 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 ... | 02/15/2000 |
| 5866262 | Fully-hydrolized ketimine silane/epoxide silane copolymer liquid hardcoating compositions and processes for dipcoating polycarbonate spectacle lenses Dipcoated Rx spectacle lenses require coating scratch resistance, tinting and/or AR coating processes. Chemically, fully-hydrolized copolymers of amino silane and epoxide silane form the chemical backbone of these heat-curing hardcoats, although polyfunct... | 02/02/1999 |
| 5792392 | Lens thickness adjustment in plastic injection mold Method and apparatus for lens thickness adjustment in injection molding of thermoplastic vision-corrective spectacle lenses without manual addition or removal of shims, of inserts or of any other mold part. Thickness adjustment can be made quickly between... | 08/11/1998 |
| 5750156 | Apparatus for injection-compression molding and ejecting paired thermoplastic spectacle lens suited for fully automated dip hardcoating Plastic 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 ... | 05/12/1998 |
| 5750060 | Method and apparatus for injection compression molding and ejecting paired thermoplastic spectacle lens suited for fully automated dip hardcoating Plastic 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 ... | 05/12/1998 |
| 5718849 | Method and apparatus for injection-compression molding & ejecting paired thermoplastic spectacle lens suited for fully automated dip hardcoating Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses are suitable to be robotically dip hardcoated. Special spring-loaded molds having variable-volume mold cavities are used in an injection-c... | 02/17/1998 |
| 5512221 | Lens thickness adjustment method and apparatus in a thermoplastic injection mold for ophthalmic finished spectacle lenses Method and apparatus for lens thickness adjustment in injection molding of thermoplastic vision-corrective spectacle lenses without manual addition or removal of shims, of inserts or of any other mold part. Thickness adjustment can be made quickly while t... | 04/30/1996 |
| 5376317 | Precision surface-replicating thermoplastic injection molding method and apparatus, using a heating phase and a cooling phase in each molding cycle Improved optical disks for information storage and holographic imaging, and optical lenses and reflective optical elements are among the difficult-to-mold thermoplastic products which require precision replication of the molding surfaces, in micro detail.... | 12/27/1994 |
| 5340303 | Faster cycling sprue for centerhole - tearout optical disk injection molds Faster injection molding cycles in an optical disk mold which forms the centerhole by tearing out the sprue can be obtained by increasing the "hot strength" of the sprue by addition of a plurality of rigidifying ribs onto only the B side of the sprue. Thi... | 08/23/1994 |
| 5244606 | Faster cycling method and apparatus for optical disk removal from injection mold A molded disk is transferred out of the mold with short-stroke low-mass motions of a pair of mechanical guides which can grip, then release, the O.D. edge of the molded disk, when acting in coordination with movable mold members having undercuts for molde... | 09/14/1993 |
| 5141430 | Injection molding apparatus operating without opening the mold to airborne contaminants An injection molding apparatus creates a micro-cleanroom environment inside a mold cavity which can stay closed to airborne contaminants while ejecting and transferring the molded part out. The molded part is formed and solidified at a parting-line plane ... | 08/25/1992 |
| 5068065 | Faster cycling sprue method and apparatus for injection molding plastic optical disks Optimum sprue design requires suitably large cross-sectional area of the open aperture during mold filling and packing yet fast heat removal from the molten sprue during solidification. This is accomplished by a "hollow" sprue configuration, wherein an en... | 11/26/1991 |
| 5015426 | Precision single cavity and multicavity plastic injection molding via an adaptive mold process In critical surface quality plastic molded articles, especially in optical lenses and disks, an "adaptive" mold cavity is used to automatically control melt pressure and densification during mold packing to within a predetermined range of acceptable value... | 05/14/1991 |
| 4981634 | Injection molding process operating without opening the mold to airborne contaminants An injection molding process creates a micro-cleanroom environment inside a mold cavity which can stay closed to airborne contaminants while ejecting and transferring the molded part out. The molded part is formed and solidified at a parting-line plane wi... | 01/01/1991 |
