Magnetic tape cassette having improved erasure preventing device

Details Magnetic tape cassette having improved erasure preventing device Magnetic tape cassette having improved erasure preventing device

1988-09-21

1989-07-04

Werner, David

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

360 60, 360132, G11B 2304

Patent

active

048443786

ABSTRACT:
A magnetic tape having an improved mistake erasure preventing device. A cylindrical body is rotatably mounted in a rear corner of the body of the cassette. The rotational axis of the cylindrical body is arranged in any of the directions of thickness, width and length of the cassette body. The cylindrical body has portions colored with conspicuous and inconspicuous colors corresponding to recordable and unrecordable states of the cassette and a hole which is aligned with a hole in the cassette body in one rotational position of the cylindrical body through which a detector of the recording/playback apparatus is insertable to detect the recordable state of the cassette. Holes are provided in the rear and side walls of the cassette body through which the colored portions of the cylindrical body are observable to visually determine the recordable state of the cassette.

REFERENCES:
patent: 4320422 (1982-03-01), Rinkleib
patent: 4348707 (1982-09-01), Maly et al.
patent: 4399481 (1983-08-01), Loranger et al.

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