9results about "Magnetic field orientation" patented technology

To provide a servo writer that reduces the number of cartridges to be discarded.SOLUTION: A servo writer 210 for a cartridge 10 includes: a traveling portion that feeds out a tape-shaped magnetic recording medium (magnetic tape MT) from the cartridge and winds the feed magnetic recording medium to make the magnetic recording medium travel; a demagnetizing magnet 214 that erases a first servo pattern formed on the traveling magnetic recording medium; a servo signal writing head 215 that writes a servo signal onto the traveling magnetic recording medium after the first servo pattern is erased and forms a second servo pattern; and a control device that controls the head to write the servo signal during at least one of acceleration and deceleration traveling periods of the magnetic recording medium and forms the second servo pattern that does not satisfy the standard on the magnetic recording medium.SELECTED DRAWING: Figure 8

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a 1-bromonaphthalene contact angle in a range of 45.0° to 55.0°, inclusive, as measured on a surface thereof and a standard deviation σ of the angle of 1.0° or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a friction coefficient of 0.35 or less as measured on a base material portion of a surface thereof and a standard deviation σ of the friction coefficient of 0.05 or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

Provided is a magnetic tape cartridge group including a plurality of magnetic tape cartridges. The magnetic tape contained in the magnetic tape cartridges includes a polyethylene naphthalate support having a Young's modulus of 10000 MPa or greater in the width direction. The arithmetic mean of media life calculated according to a linear function derived from the value of A determined for different values of N and the logarithm value of total storage time T for storage for N cycles is 3 years or more and 3σ is 1 year or less, where A is the maximum absolute value of the difference between a servo band interval determined before prescribed storage and a servo band interval determined after the prescribed storage for 100 magnetic tape cartridges.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a water contact angle in a range of 95° to 105°, inclusive, as measured on a surface thereof and a standard deviation σ of the water contact angle of 1.0° or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder, where the number of dents having circle-equivalent diameters in a range of 0.25 to 0.55 μm, inclusive, present on a surface of the magnetic layer is in a range of 10 to 500, inclusive, per area of 40×40 μm, and a standard deviation σ of the number of dents in a width direction of the surface of the magnetic layer is 50 or less. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

Provided is a magnetic-tape cartridge group containing a plurality of magnetic tape cartridges. A magnetic tape included in the magnetic tape cartridges contains a polyethylene-naphthalate support element having a widthwise Young's modulus of 10,000 MPa or greater. For 100 reels of magnetic tape cartridges, letting the maximum absolute value of the difference between a servo band interval found prior to storage under a prescribed environment, and a servo band interval found following storage for a storage time T under the prescribed environment be A, then the arithmetic mean of media life calculated by a linear function derived from the value of A and the value of the logarithm of T, loge T, is four years or more, and the 3σ is one year or less.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having an AlFeSil abrasion value in a range of 20 to 50 μm, inclusive, as measured on a surface thereof and a standard deviation σ of the AlFeSil abrasion value of 5.0 μm or less as derived in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

Provided are a magnetic tape cartridge in which a magnetic tape is accommodated, and a magnetic recording playback device including the magnetic tape cartridge. The magnetic tape includes a polyethylene naphthalate support having a Young's modulus of 10000 MPa or greater in the width direction. The media life calculated according to a linear function derived from the value of A and the value of the logarithm logeT of total storage time T for storage for N cycles is 3 years or more, where A is the maximum absolute value of the difference between a servo band interval before storage of the magnetic tape and a servo band interval determined after storage for N cycles, with prescribed storage being one cycle.