Magnetic tape cassette

Details Magnetic tape cassette Magnetic tape cassette

1980-10-02

1982-12-07

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record medium

In container

242188, 360 746, G11B 2304, G11B 1506

Patent

active

043630596

ABSTRACT:
A magnetic tape cassette holding a wound magnetic tape comprising a transparent base film and a magnetic layer having a thickness of 5.mu. or less coated on the base film comprises a hole facing a light source for detecting the tape position, a hole facing a photosenser provided so as to form a light path passing to the hole for light source through which the magnetic tape is passed and a light-shielding filter having a light transmittance in the range between 0.5 and 10 percent placed in the light path.

REFERENCES:
patent: 3573392 (1971-04-01), Trammell
patent: 3614453 (1971-10-01), Johnson
patent: 4048150 (1977-09-01), Bergmann et al.
patent: 4091426 (1978-05-01), Umeda
patent: 4173319 (1979-11-01), Umeda

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