Tape cassette

Details Tape cassette Tape cassette

1988-10-12

1990-02-20

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2302

Patent

active

049031597

ABSTRACT:
A new video tape cassette includes a cassette housing having an opening formed therein at a position corresponding to the position of a detecting aperture of a conventional video tape cassette. The detecting aperture is provided to prevent improper recording. The new tape cassette is intended for recording only in a new recording format, and the conventional tape cassette is intended for recording only in a conventional recording format. The opening prevents a recording when the new tape cassette is inserted by mistake into a conventional video tape recorder. A second detector for preventing improper recording and a detecting portion are provided to ensure that it is impossible to record in the wrong format, regardless of whether a new or conventional-type tape cassette is inserted into a new or conventional-type video tape recorder. However, the new video tape recorder can be made "upwardly compatible," meaning that it can reproduce not only the novel magnetic tape having the novel recording format but also the conventional magnetic tape having the conventional recording format.

REFERENCES:
patent: 4215377 (1980-07-01), Norris
patent: 4743984 (1988-05-01), Ryan

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