Magnetic recording tape
AssigneeFuji Photo Film Co., Ltd.
InventorsMinoru Sueki, Masatoshi Takahashi, Yutaka Kakuishi
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Abstract
A magnetic recording tape favorably employable for recording computer data is composed of a support, and on one side of the support, a non-magnetic layer composed of a non-magnetic powder and a binder, and a magnetic recording layer composed of a ferromagnetic powder and a binder superposed in order, and on the other side, a back-coating layer containing carbon black, in which the magnetic recording tape has a lateral thermal expansion coefficient of not more than 0.0015%/° C., a lateral humidity expansion coefficient of not more than 0.0015%/% RH, a longitudinal offset proof stress of not less than 10 N, and a longitudinal breaking strength of not less than 30 N.
Claims23
A magnetic recording tape comprising a support, and on one side of the support, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic recording layer comprising a ferromagnetic powder and a binder superposed in order, and on the other side, a back-coating layer containing carbon black, wherein said magnetic recording tape has a lateral thermal expansion coefficient of not more than 0.0015%/° C., a lateral humidity expansion coefficient of not more than 0.0015%/%RH, a longitudinal offset proof stress of not less than 10 N, and a longitudinal breaking strength of not less than 30 N, and
- wherein servo signals for controlling a magnetic recording or reproducing head are longitudinally recorded on said tape so as to position the head at a predetermined position along a width direction of the recording tape.
In a magnetic recording and reproducing system comprising the steps of recording magnetic signals to a magnetic recording tape and detecting said magnetically recorded signals in said magnetic tape with a magnetoresistive reproducing head, the improvement characterized in that said magnetic recording tape comprises a support, and on one side of the support, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic recording layer comprising a ferromagnetic powder and a binder superposed in order, and on the other side, a back-coating layer containing carbon black, wherein said magnetic recording tape has a lateral thermal expansion coefficient of not more than 0.0015%/° C., a lateral humidity expansion coefficient of not more than 0.0015%/% RH, a longitudinal offset proof stress of not less than 10 N, and a longitudinal breaking strength of not less than 30 N.
Dependencies are inferred from the claim text.