Magnetic tape apparatus
A magnetic tape apparatus includes a feeding unit for feeding a magnetic tape; a take-up unit for taking up the magnetic tape, a magnetic head disposed the downstream of the feeding unit and the upstream of the winding unit, in a traveling path of the magnetic tape from the feeding unit to the take-up unit, and having the moving magnetic tape abut to the magnetic head; a fixed guide unit disposed adjacent to the magnetic head at least in the upstream on downstream of the traveling direction of the magnetic tape traveling on the traveling path toward the magnetic head and guiding the magnetic tape to the traveling path by abutting to the magnetic tape; and a controlling unit disposed on the fixed guide unit for controlling the movement of the magnetic tape in the tape width direction. On a contact surface which abuts on the magnetic tape in the fixed guide unit, there is provided a space for excluding the air lying between the moving magnetic tape and the contact surface.
1. A magnetic tape apparatus, comprising:
a feeding unit for feeding a magnetic tape;
a winding unit for winding up the magnetic tape;
a magnetic head arranged on the downstream side of the feeding unit and on the upstream side of the winding unit in a running path from the feeding unit to the winding unit, the magnetic tape contacting the magnetic head when the tape runs;
a fixed guide unit arranged on at least one of the upstream side and the downstream side of the magnetic head in a running direction of the magnetic tape running on the running path so as to be adjacent to the magnetic head, and contacting the magnetic tape to guide the magnetic tape into the running path; and
a regulating unit for regulating the running of the magnetic tape in the width direction of the tape, the regulating unit being fitted to the fixed guide unit, characterized in that,
a contacting face of the fixed guide unit, which contacts the magnetic tape, is equipped with an air passage which is a space for excluding entrained air lying between the running magnetic tape and the contacting face so as to generate a negative pressure.
2. The magnetic tape apparatus according to claim 1 , characterized in that the air passage is disposed along the contacting face, and the air entrained by the magnetic tape is excluded through the air passage.
3. The magnetic tape apparatus according to claim 1 , characterized in that the air passage of the fixed guide unit is in the form of a groove.
4. The magnetic tape apparatus according to claim 1 , characterized in that the air passage is disposed to penetrate from the contacting face of the fixed guide unit through the inside of the fixed guide unit, and the air entrained by the magnetic tape is excluded through the air passage.
5. The magnetic tape apparatus according to claim 1 , characterized in that the fixed guide unit is arranged on each of the upstream side and the downstream side of the magnetic head in the running direction of the magnetic tape.
6. The magnetic tape apparatus according to claim 5 , characterized in that on the running path of the magnetic tape, the distance between the downstream side end of the regulating unit fitted to the fixed guide unit on the upstream side of the magnetic head and the upstream side end of the regulating unit fitted to the fixed guide unit on the downstream side of the magnetic head is 25 mm or less.
7. The magnetic tape apparatus according to claim 5 or 6 , characterized in that the length of the regulating unit in the magnetic tape running direction is 3 mm or more and 10 mm or less.
8. The magnetic tape apparatus according to claim 1 , characterized in that the material of the regulating unit is a ceramic.
9. The magnetic tape apparatus according to claim 1 , characterized in that the magnetic tape apparatus is a servo writer.
10. A process for producing a magnetic tape, characterized in that a servo signal is written by means of the magnetic tape apparatus as recited in claim 9 .