Magnetic tape cassette having improved magnetic shielding

Details Magnetic tape cassette having improved magnetic shielding Magnetic tape cassette having improved magnetic shielding

1984-09-24

1986-02-18

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

360132, 242199, G11B 1560

Patent

active

045716544

ABSTRACT:
A magnetic tape cassette having improved magnetic shielding and which is therefore more suitable for high density recording. A cassette case body is provided with through-holes located behind an opening into which the magnetic head is inserted for recording and reproduction, penetrating the cassette case body vertically. A shield member is mounted to slidably move back and forth in the cassette, and is urged towards the rear of the cassette by a spring. The shield member has a through-hole which confronts the through-holes of the cassette case body and a shield wall which confronts the magnetic head when the magnetic head is inserted into the opening. The shield member is slid towards the front of the cassette by a slide bar inserted into the through-hole of the cassette case body when the cassette is loaded for recording or reproduction.

REFERENCES:
patent: 4257077 (1981-03-01), Ishida
patent: 4484242 (1984-11-01), Kimizuka et al.

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