Method for molding a formatted substrate for an optical disk
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United States of America Patent
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-
Apr 21, 1992
Grant Date -
N/A
app pub date -
Apr 17, 1989
filing date -
Apr 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improvement in a method for molding a plastic substrate for an optical disk having a concave-convex pattern on a side surface thereof including a step of feeding liquid resin into a molding cavity defined by a pair of mold halves, characterized in that, when the molded plastic substrate is released from the mold halves, the molded plastic substrate is released at least simultaneously in time from both of the mold halves in a mold-opening stage.
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