Tape cassette

Details Tape cassette Tape cassette

1982-09-29

1985-07-30

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

360137, 206807, G11B 2302

Patent

active

045325669

ABSTRACT:
A tape cassette has at least one opening in a surface thereof closed by a film monolithically formed with the cassette body and which is broken by a protuberance on a tape recorder with which the cassette is used following first use of the cassette. An unbroken film is indicative of a fresh, unused cassette.

REFERENCES:
patent: 3997916 (1976-12-01), Staar
patent: 4215377 (1980-07-01), Norris
patent: 4390104 (1983-06-01), Cummings
patent: 4398634 (1983-08-01), McClosky

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