Process for producing a substrate sheet for an optical recording

Details Process for producing a substrate sheet for an optical recording Process for producing a substrate sheet for an optical recording

1989-11-13

1991-12-24

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

264 13, 264106, 2642102, 26421112, B29C 4700, B29C 4788, B29C 7102

Patent

active

050750607

ABSTRACT:
A process for producing an optical recording medium in a sheet form, including the steps of: melt-extruding a resin to form a resin sheet; and passing under pressure the resin sheet in a substantially melted state between a first heated roller having a predetermined unevenness pattern and a second heated roller disposed opposite thereto, thereby to transfer the unevenness pattern to a surface of the resin sheet.

REFERENCES:
patent: 4543225 (1985-09-01), Beaujean
patent: 4556378 (1985-12-01), Nyfeler et al.
patent: 4790893 (1988-12-01), Watkins

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