Stamper protecting layer for optical disk molding apparatus

Details Stamper protecting layer for optical disk molding apparatus Stamper protecting layer for optical disk molding apparatus

1998-04-14

2000-08-08

Pyon, Harold

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

425810, 425542, 425168, 264107, B29C 4584

Patent

active

060992875

ABSTRACT:
A stamper protecting layer is interposed between a mold and a stamper of an optical disk molding apparatus, so that forces generated by extension and shrinkage of the stamper in a diametrical direction of the stamper relative to the mold when an optical disk are molded is absorbed by the stamper protecting layer. With this arrangement, the stamper is prevented from being deformed. Accordingly quality and production of the optical disks are improved.

REFERENCES:
patent: 4544341 (1985-10-01), Gnadig et al.
patent: 5335526 (1994-08-01), Garrison et al.
patent: 5700501 (1997-12-01), Miyairi
patent: 5820898 (1998-10-01), Yasuda
The Condensed Chemical Dictionary Ninth Edition, Revised by Gessner G. Hawley, Van Notrand Reinhold Company, NY, pp. 523,636,781,865,866,896, 1977.

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