| Patent Number |
Title Of Patent |
Date Issued |
| RE38617 |
Method of injection molding plastic lens |
October 12, 2004 |
| A cavity 22 in an injection molding assembly includes a lower mold insert 21 for shaping a lens convex surface and an upper mold insert 20 for shaping a lens concave surface. When the heated injection molding assembly is cooled and a lens is ejected after a molten resin is pressurized by |
| 6210610 |
Method of manufacturing lens, injection mold for molding of lens, and molded lens |
April 3, 2001 |
| A gate top member 23 is placed to a gate 22 opened toward the circumferential edge of a molding spectacle-lens cavity 13 formed between inserts 11 and 12. The plural gate top members 23 each having a different height are previously prepared, and attached with a bolt to be exchanged. |
| 6156242 |
Method of injection molding plastic lens |
December 5, 2000 |
| A cavity 22 in an injection molding assembly includes a lower mold insert 21 for shaping a lens convex surface and an upper mold insert 20 for shaping a lens concave surface. When the heated injection molding assembly is cooled and a lens is ejected after a molten resin is pressurized by |
| 5972252 |
Injection compression molding method of a spectacle lens and a spectacle lens produced by using |
October 26, 1999 |
| In an injection compression molding method of a lens, in which a mold is closed to preserve a predetermined compressing margin in a cavity 3 for a lens, molten resin is injected and fed into the cavity 3 for the lens, and compressed for the aforementioned predetermined compressing margin |
| 5948327 |
Lens injection-compression-molding method |
September 7, 1999 |
| In an injection step, actual injection speed V is closed-controlled so that the actual injection speed V becomes equal to first or second preset speed V.sub.1 or V.sub.2 while comparing the actual injection speed V with the first or second preset speed V.sub.1 or V.sub.2 in the section b |
