Process of and apparatus for preparing optical recording medium

Details Process of and apparatus for preparing optical recording medium Process of and apparatus for preparing optical recording medium

1990-09-10

1992-09-15

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...

291216, 29132, 264 13, 264106, 2642102, 26421112, 425327, 425363, 425377, 425810, B29C 4700, B29C 4788

Patent

active

051475928

ABSTRACT:
A process for preparing a substrate sheet for optical recording mediums includes the steps of extruding a molten resin to form a resin sheet and bringing the resin sheet into pressure between a preformat roll and a roll disposed opposingly to said preformat roll to transfer a preformat pattern to the surface of the resin sheet, wherein the roll disposed opposingly to the preformat roll includes a roll whose surface is covered with an elastomeric resin.

REFERENCES:
patent: 3758649 (1973-09-01), Frattarola
patent: 3882207 (1975-05-01), Hannan et al.
patent: 4097634 (1978-06-01), Bergh
patent: 4211743 (1980-07-01), Nauta et al.
patent: 4543225 (1985-09-01), Beaujean
patent: 4790893 (1988-12-01), Watkins

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