Magnetic tape cassette

Details Magnetic tape cassette Magnetic tape cassette

1983-08-12

1985-02-19

Levy, Stuart S.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242188, G11B 1508

Patent

active

045000506

ABSTRACT:
A magnetic tape cassette includes a reel retaining plate for urging hubs of take-up and supply reels vertically downward to achieve uniform tape recording and playback characteristics. The reel retaining plate contains a plurality of protrusions at its central portion which engage with a plurality of vertically extended grooves that are contained in a cylindrical wall which is located on a lower cassette half, the cylindrical wall defining an insertion hole for a light emitting element of a photosensor. The reel retaining plate is held between a top surface of the cylindrical wall and an inner surface of an upper cassette half.

REFERENCES:
patent: 3615155 (1971-10-01), Gelbman
patent: 4091426 (1978-05-01), Umeda
patent: 4368860 (1983-01-01), Goto
patent: 4449676 (1984-05-01), Ogata et al.

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