Abstract: A linear tape system has a multi-reproducing head MRh comprising a plurality of reproducing heads Rh each of which corresponds to one recording track Tr. Each reproducing head of the multi-reproducing head is arranged with a displacement in a width direction of the recording track. An entire width MRhw of the multi-reproducing head is enlarged larger than a width Trw of the recording track. In this manner, the linear tape system can reproduce the recording track recorded in a narrow width and provide a higher recording density.

Abstract: A magnetic recording/reproducing head having a plurality of magnetic head elements for multi-channeling capable of achieving high density recording/reproducing capability, including: a plurality of magnetic recording/reproducing head layers each including magnetic recording/reproducing head elements fabricated by a thin film process and interposed between two insulating/magnetic shielding layers laminated on a non-magnetic substrate; the total of magnetic recording/reproducing head elements formed therein are displaced from each other in a head width direction, and each magnetic recording/reproducing head layer has a plurality of magnetic recording/reproducing head elements formed at a predetermined pitch.

Abstract: A magnetic recording/reproducing head having a plurality of magnetic head elements for multi-channeling capable of achieving high density recording/reproducing capability, including: a plurality of magnetic recording/reproducing head layers each including magnetic recording/reproducing head elements fabricated by a thin film process and interposed between two insulating/magnetic shielding layers laminated on a non-magnetic substrate; the total of magnetic recording/reproducing head elements formed therein are displaced from each other in a head width direction, and each magnetic recording/reproducing head layer has a plurality of magnetic recording/reproducing head elements formed at a predetermined pitch.

Abstract: In a helical scan type magnetic tape recording apparatus, one thin film multi-recording head is mounted on a rotary drum, wherein the multi-recording head includes N recording heads for recording N recording tracks at a predetermined track angle on a magnetic tape by one rotation of the rotary drum to perform recording for forming continuous recording tracks having the same track pitches, by determining rotary drum rotation and a tape speed in accordance with equation V1=Tp·N·(RPS)/sin ?, such that (N?1) recording tracks having the same track pitches narrower than the head width and one recording track having a wider track width than that are formed by a first rotation of the drum, then by a second rotation, a preceding recording head overwrites the recording track having the wider track width to form a recording track having a track width equal to the track width of the recording track.

Abstract: A thin film magnetic head, in which: a magnetic gap thereof is disposed slantingly relative to a direction orthogonal to a scanning direction of the head corresponding to an azimuth angle; an upper magnetic core layer is positioned on a leading side preceding a lower magnetic core layer in a scanning direction of the head, a protrusion on the lower magnetic core layer has an inclined side surface inclined at an angle equal to or greater than the azimuth angle at least on one side surface in a direction of a track width thereof, and at least one edge of a side adjacent to the magnetic gap of a protrusion on the upper magnetic core layer is aligned on a line drawn extending from the inclined side surface of the lower magnetic core layer, thereby suppressing occurrence of side erasing in a magnetic recording medium during azimuth recording.

Abstract: In a helical scan type magnetic tape recording apparatus, one thin film multi-recording head is mounted on a rotary drum, wherein the multi-recording head includes N recording heads for recording N recording tracks at a predetermined track angle on a magnetic tape by one rotation of the rotary drum to perform recording for forming continuous recording tracks having the same track pitches, by determining rotary drum rotation and a tape speed in accordance with equation V1=Tp·N·(RPS)/sin ?, such that (N-1) recording tracks having the same track pitches narrower than the head width and one recording track having a wider track width than that are formed by a first rotation of the drum, then by a second rotation, a preceding recording head overwrites the recording track having the wider track width to form a recording track having a track width equal to the track width of the recording track.

Abstract: A rotary magnetic head apparatus which can be formed into a smaller size in which signals of a plurality of recording tracks which are recorded on a tape-like information recording medium are reproduced by using a plurality of reproduction heads without depending on the arrangement of the recording tracks in the information recording medium. The rotary magnetic head apparatus includes a rotary drum, a fixed drum, a reproduction signal selection device, a rotor reproduction signal wiring section, and a stator reproduction signal wiring section.

Abstract: Disclosed is a magnetic recording medium, which comprises a metal magnetic thin film formed on a nonmagnetic support member, surface resistivity of the metal magnetic thin film is in the range of 1×103 &OHgr;/sq.-1×107 &OHgr;/sq., a value of Mr·t (a product of amount of residual magnetization (Mr) and film thickness (t)) is within the range of 4 mA-13 mA, and amount of residual magnetization (Mr) is within the range of 160 kA/m-360 kA/m. As a result, in the reproduction using GMR head, it is possible to suppress noise and to prevent saturation of GMR head and electrostatic destruction.

Abstract: In a helical scan type magnetic recording/reproducing apparatus, input data is encoded into n-channel (e.g., n=4) signals for recording by first to fourth recording heads, and the recorded signal is reproduced by 2n reproducing heads, subjected to a non-tracking process and decoded. In the apparatus, the first to fourth recording heads are configured as a single multi-gap head having four gaps. Each of the heads is made of a lower magnetic pole and an upper magnetic pole through a gap. The core width of the second to fourth heads is formed as a track pitch TP+&agr;1 so as to overlap by &agr;1 with a track pitch TP of the first to third heads to attain a predetermined recording width. The core width of the first head is formed as a track pitch TP+&agr;2 (&agr;2 >&agr;1) . As a result, high-density recording can be implemented.

Abstract: The present invention provides a multi-magnetic recording head capable of increasing a magnetic recording density of information recorded on a magnetic recording medium. The multi-magnetic recording head includes a substrate, a pair of first thin film magnetic poles with a specific gap put therebetween, which are stacked over the substrate, and a pair of second thin film magnetic poles with a specific gap put therebetween, which are stacked over the pair of first thin film magnetic poles, wherein the pair of first thin film magnetic poles and the pair of second thin film magnetic poles are offset from each other in the direction nearly perpendicular to the stacking direction.

Abstract: In a helical scanning type magnetic recording and/or reproducing apparatus for selecting one of output signals of two reproducing heads that are disposed at positions different by of 180° and transferring the selected output signal with a rotary transformer of one channel, a rotor side winding of a reproducing signal channel of a rotary transformer is divided into two portions. The divided portions are connected at two positions that are opposite to output terminals of head amplifiers that amplify output signals of reproducing heads and that have self short-circuit switches. Without use of extra wirings, the head amplifiers are directly connected to the rotary transformer. An output signal of the reproducing head is selected by short-circuiting a self short-circuit switch of a head amplifier corresponding to a head that does not reproduce a signal.

Abstract: First, data is read from tracks formed on a tape-shaped recording medium by heads disposed on a rotary drum, to measure error rates. Next, of the tracks formed on the tape-shaped recording medium, a worst track suffering the highest error rate is detected based on the error rates thus measured. Then, a pair of reproducing heads that can reproduce the worst track thus detected at the lowest error rates is detected from the measured error rates. Thereafter, tracking servo control is performed such that the worst track can be scanned by the pair of reproducing heads. As a result, a reproducing apparatus capable of proper reproduction even when recorded tracks undergo variations in width and reproducing heads are erroneously mounted.

Abstract: A pair of reels of a magnetic cassette tape and a pair of reel supports of a magnetic tape drive comprise a conductive material as an antistatic treatment. Further, a head substrate and a projection substrate of a head drum comprise a conductive material having a resistance of 1×1010 &OHgr; or less and are connected to a metal base so as to be at the ground potential via the metal base and a rotating drum. These antistatic treatments allow static electricity charged on a magnetic tape to be discharged to the head substrate and the protection substrate without flowing to a magneto-resistive (MR) element, thereby preventing the electrostatic discharge breakdown of the MR element.

Abstract: A magnetic head device including: a first magnetic head for performing recording in a first magnetic track on a magnetic tape in the longitudinal direction when the magnetic tape runs in one direction; a second magnetic head for performing recording in a second magnetic track parallel to the first magnetic track when the magnetic tape runs in another direction; and a reproducing head disposed between the two magnetic heads is provided. Each of the two magnetic heads has a lower core and an upper core having a width equal to or smaller than the lower core. The two magnetic heads and the reproducing head are arrayed parallel to the running direction of the magnetic tape, and each of the two magnetic heads is so disposed that the upper core precedes the lower core in relation to the running direction of the magnetic tape when recording on the respective magnetic tracks.

Abstract: A method for detecting the degree of wear of a magneto-resistance (MR) effect type magnetic head element for reading a magnetic signal by use of a simple structure is disclosed. The degree of wear of an MR head for reading a magnetic signal from a magnetic tape is detected based on a value of resistance of an MR element by a head wear detecting circuit. A signal indicative of the degree of wear of the MR head is supplied to an alarm generating circuit for example, to generate an alarm informing of the life of the MR head.

Abstract: A thin film magnetic recording head comprises a substrate, a first magnetic core formed on the substrate, a second magnetic core having the front end face with a magnetic gap with respect to the front end face of the first magnetic core, and a coil for developing magnetic flux between the front end portions of the magnetic cores. A width of the second magnetic core at the front end portion thereof is chosen to be smaller than that of the first magnetic core. The second magnetic core is at a leading position relative to the second magnetic core in a traveling direction on a recording medium. In such configuration, it is possible to reduce side erase due to recording magnetic flux fringing and to achieve high density of magnetic recording while maintaining the conventional fabrication steps for the thin film magnetic recording head, thereby avoiding the problem in the fabrication.

Abstract: A head substrate and a projection substrate of a head drum comprise a conductive material having a resistance of 1×1010&OHgr; or less and are connected to a metal base so as to be at the ground potential via the metal base and a rotating drum. These antistatic treatments allow static electricity charged on a magnetic tape to be discharged to the head substrate and the protection substrate without flowing to a magneto-resistive (MR) element, thereby preventing the electrostatic discharge breakdown of the MR element.

Abstract: A magnetic recording/reproducing head having a plurality of magnetic head elements for multi-channeling capable of achieving high density recording/reproducing capability, including: a plurality of magnetic recording/reproducing head layers each including magnetic recording/reproducing head elements fabricated by a thin film process and interposed between two insulating/magnetic shielding layers laminated on a non-magnetic substrate; the total of magnetic recording/reproducing head elements formed therein are displaced from each other in a head width direction, and each magnetic recording/reproducing head layer has a plurality of magnetic recording/reproducing head elements formed at a predetermined pitch.

Abstract: A magnetic tape drive apparatus in which data are recorded/reproduced on/from a magnetic tape by recording/reproducing magnetic heads which are disposed on a head drum and moved on a circular locus comprising cleaning device for removing deposit such as stain adhering to a magnetic head to clean the magnetic head, error rate detection device for detecting the error rate of the magnetic tape when data are recorded/reproduced onto/from the magnetic tape, and error rate storage device for storing the error rate detected by the error rate detection device, wherein the error rate detected by the error rate detection device exceeds a reference error rate by a predetermined amount, the magnetic head is cleaned by the cleaning device.

Abstract: There is provided a magnetic tape recorder/player for writing and/or reading an information signal to and/or from a magnetic tape encased in a two-reel type tape cartridge. The apparatus includes a magnetic head dedicated for writing or reading information on the position of the magnetic tape to or from the magnetic tape, and the tape cartridge has formed therein an opening in a position where the opening will be vis-a-vis to the position information-dedicated magnetic head when the tape cartridge is set in place in the magnetic tape recorder/player.