Process of making substrate for an optical recording medium

Details Process of making substrate for an optical recording medium Process of making substrate for an optical recording medium

1994-01-21

1995-10-24

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...

2642102, 26421112, B29C 4700, B29C 5904

Patent

active

054607663

ABSTRACT:
A roll stamper for forming an information recording medium substrate has a stamper member having a pattern corresponding to a pre-format for an information recording medium formed in its obverse surface, fixation members fixed to both end portions of a reverse surface of the stamper so as to be integral with the stamper member, and fit grooves formed in a circumferential surface of a specular roll base parallel to the axis of the specular roll base. The fixation members are fitted in the fit grooves, and the stamper member is fixed on the circumferential surface of the specular roll base. The roll stamper also includes a mechanism for applying a tensile force to the stamper member. This roll stamper is used in an apparatus having an extruder for melting and extruding a resin to form a resin sheet and a specular roll facing the roll stamper to continuously form the information recording medium substrate.

REFERENCES:
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patent: 5087192 (1992-02-01), Kanome et al.
patent: 5147592 (1992-09-01), Sato et al.
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