Recording medium casing with erase prevention device
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United States of America Patent
Stats
-
Mar 13, 1990
Issued Date -
N/A
app pub date -
Sep 8, 1988
filing date -
Oct 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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