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    • 4. 发明授权
    • Method of removing excess lens forming material from a molded ophthalmic lens such as a contact lens
    • 从诸如隐形眼镜的模制眼镜片去除多余的透镜形成材料的方法
    • US08721934B2
    • 2014-05-13
    • US12969700
    • 2010-12-16
    • Axel HeinrichRoger BielGünter LässigJan BernardStephan Pirl
    • Axel HeinrichRoger BielGünter LässigJan BernardStephan Pirl
    • B29C37/02
    • B29C71/0009B29C37/02B29C2071/0027B29C2071/0045B29D11/00125B29D11/00586B29L2011/0041
    • There is described a method of removing excess lens forming material from a molded ophthalmic lens (1), such as the peripheral region of a contact lens. In order to form a lens (1) a lens forming material is polymerized and/or cross-linked within a mold cavity of a mold comprising female and male mold halves. The mold is opened by moving the female and male mold halves apart from each other. The formed lens (1) is supported on a carrier (3) such, that a front surface (2) of the lens (1) is exposed. Residues of non-polymerized and/or non-cross-linked lens forming material are removed mechanically by contacting the exposed surface (2) of the formed lens (1) for a period of time of about 0.5 seconds to about 4 seconds, preferably about 0.8 seconds to about 2 seconds, with a cleaner (7) having a hardness which is smaller than that of the polymerized and/or cross-linked lens forming material. There is also described a device (5) for carrying out the method.
    • 描述了从诸如隐形眼镜的周边区域的模制眼用透镜(1)去除多余的透镜形成材料的方法。 为了形成透镜(1),透镜形成材料在包括阴模和阴半模的模具的模腔内聚合和/或交联。 通过将阴模和阴半模分开移开来打开模具。 形成的透镜(1)被支撑在载体(3)上,使得透镜(1)的前表面(2)露出。 通过使所形成的透镜(1)的暴露表面(2)接触约0.5秒至约4秒的时间段,优选大约为约4秒,通过机械地去除非聚合和/或非交联透镜形成材料的残余物 0.8秒至约2秒,其中清洁剂(7)的硬度小于聚合和/或交联透镜形成材料的硬​​度。 还描述了一种用于执行该方法的装置(5)。