Roll for forming optical recording medium substrate

Details Roll for forming optical recording medium substrate Roll for forming optical recording medium substrate

1990-03-09

1992-02-11

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

425810, B29C 4308, B29C 4346

Patent

active

050871927

ABSTRACT:
A forming roll for a substrate used for an optical recording medium comprises a roll for continuously forming substrates used for optical recording mediums having preformatting information. Said roll comprises a roll substrate having on its surface a stamper on which a pattern corresponding with the preformatting information has been formed, and, assuming the radius of said roll substrate as "r" mm, the length of said pattern in the peripheral direction of said roll substrate as "t" mm, they satisfy the relationship of:

REFERENCES:
patent: 1996057 (1935-04-01), Buckle
patent: 2060082 (1936-11-01), Johnson et al.
patent: 2529083 (1950-11-01), Keefe
patent: 3072519 (1963-01-01), Salzman
patent: 3768946 (1973-10-01), Matuschke
patent: 3860473 (1975-01-01), Wesen
patent: 3874836 (1975-04-01), Johnson et al.
patent: 4294782 (1981-10-01), Froehlig
patent: 4836874 (1989-06-01), Foster
patent: 4913858 (1990-04-01), Miekka et al.

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