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    • 5. 发明授权
    • Rotational indexing base curve deposition array
    • 旋转分度基线曲线沉积阵列
    • US5916494A
    • 1999-06-29
    • US581156
    • 1995-12-29
    • Michael F. WidmanHenri A. DagobertEdmund C. Rastrelli
    • Michael F. WidmanHenri A. DagobertEdmund C. Rastrelli
    • G02C7/04B29C31/00B29C33/30B29C33/38B29C39/02B29C39/24B29C43/00B29D11/00B29K33/04B29L11/00
    • B29D11/00221B29C31/006B29C33/30B29D11/00019B29C43/00Y10S425/808
    • A rotational indexing base curve deposition array for assembling contact lens base curves and front curves with a prescribed and programmable angular orientation to produce a contact lens having a selected axis placement therein, such as a toric axis for a toric contact lens. An array of front curve molds are arranged in a support pallet with a dosed amount of monomer mixture deposited into each of the front curve molds. An array of deposition tubes, positioned in a support plate and coupled to a vacuum source, is used to pick up and support an array of base curve molds. Each of the deposition tubes is then angularly rotated in to the support plate to a selected angularly indexed position therein. A common angular rotational drive is coupled to each of the deposition tubes in the array to angular index each of the deposition tubes to a precise angular position in the support plate. The common angular rotational drive is driven by a stepper motor which can be controlled in a programmable manner to change the selected angularly indexed position. The stepper motor drives moveable racks, which drive pinion gears around the deposition gears. The angularly indexed array of base curve molds is then assembled over the array of front curve molds to produce toric lenses having first and second optical surfaces which are precisely angularly indexed relative to each other.
    • 一种旋转分度基线曲线沉积阵列,用于组装具有规定和可编程角度取向的隐形眼镜基部曲线和前曲面,以产生其中具有选定轴线的接触透镜,例如用于复曲面隐形眼镜的复曲面轴。 将前曲面模具阵列布置在支撑托盘中,并将一定量的单体混合物沉积到每个前曲面模具中。 位于支撑板中并联接到真空源的沉积管阵列用于拾取和支撑基弧曲线模具阵列。 然后将每个沉积管角度地旋转到支撑板中至其中的选定的角度分度位置。 共同的角旋转驱动器耦合到阵列中的每个沉积管,以将每个沉积管的角度指向支撑板中的精确角位置。 共同的角度旋转驱动由步进电动机驱动,该步进电动机可以以可编程的方式被控制以改变所选择的有角度的分度位置。 步进电机驱动可移动的机架,驱动小齿轮围绕沉积齿轮。 然后将基础曲线模具的角度分度的阵列组装在前曲面模具的阵列上,以产生具有相对于彼此精确成角度索引的第一和第二光学表面的复曲面透镜。