Method for molding of substrate for information recording medium

Details Method for molding of substrate for information recording medium Method for molding of substrate for information recording medium

1990-12-03

1992-12-29

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

264219, 2642972, 249103, 425175, 425810, B29C 3330

Patent

active

051749378

ABSTRACT:
A method for preparing a substrate for an information recording medium, which comprises injecting a liquid resin into a mold for cast molding of a substrate for information recording medium having a plurality of units of mold for cast molding having an uneven preformat pattern on the surface arranged therein and solidifying the resin, and a mold for molding of the substrate.

REFERENCES:
patent: 3536290 (1970-10-01), Terry
patent: 4295628 (1981-10-01), Kupf et al.
patent: 4435343 (1984-03-01), Ando et al.
patent: 4670077 (1987-06-01), Peeters
patent: 4783041 (1988-11-01), Sakaida et al.
patent: 4828769 (1989-05-01), Maus et al.

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