Patent ID: 7259930

Claim:
An apparatus for transporting a magnetic tape comprising: a writing head disposed over a transport path of the magnetic tape, the writing head having at least two parallel and linear magnetic gaps which are spaced a predetermined distance in a direction of transporting the magnetic tape; a unit for generating pulse signal which cyclically sends a pulse signal to the writing head to write a magnetic pattern corresponding to the magnetic gaps on the magnetic tape; a reading head disposed downstream the writing head, the reading head detecting the magnetic pattern, which is written on the magnetic tape, to generate a resulting pulse signal; and a unit for calculating transport speed which calculates a transport speed of the magnetic tape based on the pulse signal sent by the reading head, wherein the unit incorporates a first time interval of the pulse signal which is obtained from two parallel and linear pattern components within a magnetic pattern and a second time interval of the pulse signal which is obtained from adjacent magnetic patterns.