Magnetic tape cassette
AssigneeFuji Photo Film Co., Ltd.
InventorsMasato Mizuno, Kengo Oishi
Life of this patent
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Abstract
A magnetic tape cassette in which critical parts subject to wear are coated with a hard coating such as an ultraviolet-cured resin. Among other effects, the generation of rubbed-off powder is reduced, thereby reducing the amount of data drop-out. Also, the case of the cassette is protected from damage.
Claims6
In a magnetic tape cassette incorporating a guide member disposed in sliding contact with a magnetic tape for stabilizing the running of the magnetic tape, the improvement wherein said guide member comprises a cylindrical body molded of a synthetic resin, an antistatic ultraviolet-cured coating having a low electrical resistance of no more than 1.times.10.sup.11 ohms/cm, and a high-hardness ultraviolet-cured coating having a pencil hardness of at least 5 H, said high-hardness ultraviolet-cured coating having a pencil hardness of at least 5 H being formed alternatively with the antistatic ultraviolet-cured coating having a low electrical resistance of no more than 1.times.10.sup.11 ohms/cm on an outer peripheral surface of the cylindrical body in the form of stripes extending generally along the axis of the cylindrical body, arranged in an inclined relation to the axis of the cylindrical body, or arranged spirally.
Dependencies are inferred from the claim text.