US Patent No: 7,332,110
Number of patents in Portfolio can not be more than 2000
Method and device for producing optical part
Stats
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Feb 19, 2008
Issued date -
Dec 6, 2004
filing date -
11/005,208
serial no -
In Force
status
Importance
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Abstract
An annular insert (4) is arranged in the optical component molding cavity of a mold to surround an outer periphery of raw material resin in a direction in which the resin is distributed in the cavity to limit the distribution of the raw material resin and define an outer profile of a lens (L). With this arrangement, it is only necessary to provide raw material resin only by a quantity equal to the volume of the region surrounded by the molding surfaces of upper and lower mold inserts (14, 24) and the inner peripheral edge of the annular insert (4) of the mold, so that the required volume of the raw material resin can be reduced. Since the pressure is preserved at the outer periphery of the distributed resin by the presence of the annular insert (4), the residual strain of the resin is minimized to prevent generation of sink mark, thereby providing excellent optical characteristics on the lens (L).
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,948,327 Lens injection-compression-molding method | 6 | 1997 | |
| RE38617 Method of injection molding plastic lens | 3 | 2001 | |
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| 7,147,454 Optical lens molding apparatus and precision molding apparatus | 2 | 2005 | |
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| 6,201,036 Light-curable polymer material, method for making an elastic intraocular lens, and an elastic intraocular lens | 1 | 1999 | |
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| 4,208,365 Method and apparatus for molding toric contact lenses | 29 | 1978 | |
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| 6,730,244 Plastic lens and method for the production thereof | 31 | 1995 | |
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| 5,893,998 Boundary apparatus for optical component molding | 13 | 1997 | |
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| 4,693,446 Gasket for molding plastic lenses | 94 | 1985 | |
Patent Citation Ranking
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