Magnetic sheet cassette device

Details Magnetic sheet cassette device Magnetic sheet cassette device

1981-08-13

1984-08-07

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2302

Patent

active

044646925

ABSTRACT:
A magnetic sheet cassette device consisting of a rigid casing and a magnetic sheet housed therein, featured in having cavities between the recording faces of the magnetic sheet and the casing for preventing abrasion or damage by bending of the recording faces, featured further in having plural apertures in the casing corresponding to the index hole of the magnetic sheet in order to allow detection thereof with a single photocoupler even when the cassette device is inverted, and featured in having an aperture for prohibiting information write-in in a part of the cassette device in order to prevent erroneous erasure of the recorded information.

REFERENCES:
patent: 3931644 (1976-01-01), Ward
patent: 3950786 (1976-04-01), Shapley
patent: 4277810 (1981-07-01), Helmrich

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