Substrates for optical cards, process for preparing substrates f

Details Substrates for optical cards, process for preparing substrates f Substrates for optical cards, process for preparing substrates f

1991-04-04

1993-11-30

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

3692751, 264 13, 264106, B29C 4700

Patent

active

052672280

ABSTRACT:
A substrate for an optical card having tracking grooves in a stripe form formed on the surface of an extrusion-molded thermoplastic resin sheet is characterized in that the direction of the tracking grooves is in parallel to the extrusion direction of the thermoplastic resin sheet, and the recording or reproduction using the optical card is characterized by that the optical card is bent and reciprocally moved along the direction of tracking grooves.

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patent: 4860273 (1989-08-01), Sawano et al.
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patent: 5075060 (1991-12-01), Imataki
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Patent Abstracts of Japan, vol. 12, No. 497 (P-806), Dec. 26, 1988; & JP-A-63 205 855 (Canon Inc.) Aug. 25, 1988, Abstract.
Patent Abstracts of Japan, vol. 12, No. 23 (P-658), Jan. 23, 1988; & JP-A-62 177 747 (Canon Inc.) Aug. 4, 1987, Abstract.

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