Recording medium casing with erase prevention device

Details Recording medium casing with erase prevention device Recording medium casing with erase prevention device

1988-09-08

1990-03-13

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 60, G11B 1504

Patent

active

049087258

ABSTRACT:
An erase prevention device for use in a recording medium casing to selectively inhibit recording on a recording medium contained in the recording medium casing when the casing is placed in a recorder. The device comprises coaxial holes formed in the recording medium casing to provide an injection passage. A slider is guided for sliding movement in the recording medium casing between first and second positions. The slider opens the inspection passage in the first position to inhibit recording and closes the inspection passage in the second position to allow recording. An aperture is formed in the recording medium casing for providing a visible indication of the position of the slider. The slider opens the aperture in the first position and closes the aperture in the second position. With this arrangement, the position of the slider is apparent at a glance to prevent mistake.

REFERENCES:
patent: 4012011 (1977-03-01), Saito
patent: 4041537 (1977-08-01), Kishi
patent: 4044386 (1977-08-01), Satou et al.
patent: 4460930 (1984-07-01), Takahashi
patent: 4507692 (1985-03-01), Sasaki

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