| 摘要 |
Apparatus for molding a lens block directly upon one side of a lens blank for use in conjunction with other apparatus for performing manufacturing operations upon the blank. The blocking apparatus comprises, in general, an axially rotatable disc upon one side of which a number of block-forming molds are disposed adjacent its periphery. The molds each have one open side against which a lens blank is clamped and a lateral opening through which a suitable blocking material may be introduced into the mold at a blocking station. The blocking station is reached by rotatably indexing the disc until alignment of a particular mold therewith is accomplished. Lens aligning indecia associated with each block-forming mold are illuminated at the block-forming station so as to facilitate centering and cylinder axis alignment of a particular lens blank relative to a block to be formed thereon at the molding station.
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