Magnetic tape cassette having friction sheet protruding portions

Details Magnetic tape cassette having friction sheet protruding portions Magnetic tape cassette having friction sheet protruding portions

1994-03-07

1994-12-27

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

2423452, 2423453, G11B 2304

Patent

active

053770668

ABSTRACT:
A magnetic tape cassette including a pair of hubs which are rotatably supported in an internal opening defined between upper and lower half portions of a body of the cassette and on which a magnetic tape is wound, and friction sheets provided between the tops and bottoms of the hubs and the upper and lower inside surfaces of the cassette. Each of the sheets includes projecting portions having substantially rectangular cross sections and extending substantially in a longitudinal direction of the sheet so that the protruding portions reach both ends of the sheet and at least two hub holes are located between the protruding portions. At least one side edge of the top of each of the protruding portions is wavily curved, and the width of each of the protruding portions is relatively small at both ends of the protruding portion. The hubs and the tape are supported by tops of the protruding portions.

REFERENCES:
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patent: 3977626 (1976-08-01), Gaiser et al.
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