Compact cassette having a liner made of high glass-transition-temperature polymer materials
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United States of America Patent
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Nov 22, 1994
Issued Date -
N/A
app pub date -
Nov 17, 1993
filing date -
Mar 28, 1989
priority date (Note) -
Expired
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Abstract
A compact cassette is provided with substantially rectangular plastic support liner(s) between tape roll(s) and cassette wall(s), having at least one longitudinal bend, and the deflections of the support liners in a defined load range should be not more than a factor of 2 greater in the case of exposure to heat at about 85.degree. C. compared with no exposure. Suitable liner materials are those having glass transition temperatures equal to or greater than 85.degree. C., for example consisting of polysulfones, polyethersulfones, polyarylether ketones, polyetherimides, and/or blends and/or copolymers thereof.
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