US 4,571,654 AGranted

Magnetic tape cassette having improved magnetic shielding

AssigneeFuji Photo Film Co., Ltd.

InventorKengo Oishi

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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.

Claims8

Dependent claims

A magnetic tape cassette for use in a cassette tape machine having a slide bar which is inserted through said cassette, said cassette having a pair of hubs on which a magnetic tape is wound, and an opening at a front side of the cassette into which a magnetic head is inserted, said cassette comprising:

a cassette case body having first through-holes located behind said opening and penetrating said cassette case body substantially parallel to said front side;
and a shield member in said cassette slidable toward and away from said opening and urged away from said opening by an elastic member, said shield member comprising:
a body having a second through-hole which is in substantial alignment with said first through-holes of said cassette body, and a shield wall of said shield member which confronts said magnetic head when said head is inserted into said opening, said slide bar being inserted into said second through-hole of said body, thereby causing said shield member to slide toward said front side of said cassette.

Dependencies are inferred from the claim text.