Two-sided, light-readable information recording disc stacks and

Details Two-sided, light-readable information recording disc stacks and Two-sided, light-readable information recording disc stacks and

1995-12-27

1998-03-17

Cao, Allen

Dynamic information storage or retrieval

Storage medium structure

Combined with diverse art structure

369284, G11B 370, G11B 726

Patent

active

057295336

ABSTRACT:
Recording media made up of two discs bonded together back to back have one disc on which programming information is recorded in light-readable form (generally similar to conventional CDs or CD-ROMs) and a second disc bearing visible indicia regarding the recording media. At least some of the visible indicia on the second disc are generic (i.e., are not specific to the particular programming on the other disc). These generic visible indicia are preferably formed on the second disc prior to the bonding of the two discs together. Additional visible indicia that are specific to the particular programming on the other disc may be added to the second disc. The visible indicia may be provided in several ways such as by "pit art", thermal branding, laser scribing, printing, labelling, etc. The second disc may also contain some recorded, generic, light-readable information such as "Wrong side--turn disc over."

REFERENCES:
patent: 3689078 (1972-09-01), Ban
patent: 4629668 (1986-12-01), Hamersley et al.
patent: 4967286 (1990-10-01), Nomula et al.
patent: 4972404 (1990-11-01), Yamaguchi et al.
patent: 5068846 (1991-11-01), Kramer
patent: 5138604 (1992-08-01), Umeda et al.
patent: 5398231 (1995-03-01), Shin et al.
patent: 5470627 (1995-11-01), Lee et al.
F. Vizard, "Video's New Look", Popular Mechanics, May 1995, p. 32.

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