Apparatus for molding a formatted substrate for an optical disk

Details Apparatus for molding a formatted substrate for an optical disk Apparatus for molding a formatted substrate for an optical disk

1992-04-20

1992-12-15

Heitbrink, Jill L.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

264334, 425556, 425437, 425441, 425810, B29C 4540

Patent

active

051715856

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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patent: 4961884 (1990-10-01), Watanabe et al.
patent: 4994228 (1991-02-01), Watanabe
patent: 5006058 (1991-04-01), Maruyama et al.

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