Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
2009-06-11
2011-11-29
Wollschlager, Jeffrey (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C264S001100, C264S001260, C264S001290, C264S001310, C264S001320, C264S001330, C264S001340, C264S001700, C264S001800, C264S001900, C264S002500, C264S002600, C264S002700, C264S001240, C264S297100, C264S297800, C065S387000, C065S037000, C065S039000, C359S645000, C359S643000, C351S159000, C425S808000, C073S15000R, C073S864530
Reexamination Certificate
active
08066920
ABSTRACT:
Optical qualities of a production lot of base material used in the fabrication of semi-finished lenses may be accurately determined by employing chipper plate samples produced from the base material in accordance with aspects of the present invention. In various implementations of the present invention, the chipper plates samples may be fabricated by subjecting base material to an extended cycle time and temperature profile using a mold having cavities of different thicknesses. The resulting chipper plates provide an improved indication of the color of semi-finished lenses molded from the production lot as well as an improved indication of resin stabilizer defects that may be utilized during a pelletizing process to control and enhance the quality of a production lot. Furthermore, the chipper plates may be provided by suppliers as samples of a production lot to enable customers to base purchasing decisions on a reliable and accurate measure of optical properties.
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Gazaille Daniel
Kitchloo Paresh
Weymouth, Jr. Russell F.
Gentex Optics, Inc.
Keusey & Associates, P.C.
Wollschlager Jeffrey
Yi Stella
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