Magnetic tape cassette

Details Magnetic tape cassette Magnetic tape cassette

1981-03-23

1983-06-14

Dixson, Jr., William T.

Receptacles

Sectional

Knockdown

242199, B65D 600, G03B 104, G11B 1532

Patent

active

043878237

ABSTRACT:
A magnetic tape cassette including an intermediate frame which has flat upper and under surfaces in parallel and provides a sufficient space therein to hold a length of magnetic tape, and substantially flat top and bottom plates fastened, respectively, to the flat upper and under surfaces of the intermediate frame, characterized in that said intermediate frame is made of a composite resin material which comprises an unsaturated polyester resin and a thermoplastic polymer containing from 50 to 75% by weight of calcium carbonate and glass fiber on the basis of the total resin weight, the intermediate frame having a linear expansion coefficient in the range from 1.times.10.sup.-5 to 3.times.10.sup.-5 /.degree.C., said calcium carbonate and said glass fiber being used in a ratio by weight of from 60:10 to 40:30.

REFERENCES:
patent: 3661294 (1972-05-01), Pearson et al.
patent: 4267986 (1981-05-01), Uemura et al.
patent: 4299349 (1981-11-01), Gilden

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