Abstract: The read head according to the invention comprises a matrix network of elementary heads whose magnetic circuit comprises a magneto-resistive element. The different elements are electrically connected in columns and traversed by a current. Head selection lines enable the active line of heads to be selected. The read signal is collected on each column.

Abstract: A data storage system such as a tape drive or flexible disk drive having a dual-gap head being controlled by a dual-mode flexible disk controller. The flexible disk controller has a first mode designed to use a head having one section for perpendicular reading and writing and a second section for erasing. The flexible disk controller has a second mode designed to use a conventional flexible disk head having a single gap for reading, writing and erasing. The data storage system has a head which has one relatively long gap optimized for overwrite/erase capability and a separate shorter read-only gap optimized for reading high bit densities. The data storage system uses the flexible disk controller in its first mode for formatting and writing and in its second mode for reading. When the controller is being used in a perpendicular recording mode, the head design with the write section offset from the erase section requires extended formatted sector fields.

Abstract: A magnetic head has a peripheral magnetic field, which is weaker than the coercivity of a recording medium, that is formed beside or around magnetic poles that define a narrow track width. This reinforces a longitudinal magnetic field produced by the head which has been weakened by reducing the cross section of each of the magnetic poles in an effort to obtain the narrow track width. That is, the longitudinal magnetic field distribution formed by the magnetic head is provided by a combination of the principal region having the strongest magnetic field for defining the narrow track width, and the region having a weak magnetic field formed beside or around the principal region. In this way, the combined magnetic field is stronger that the coercivity of the recording medium, but only at the magnetic poles so a narrow track width is achieved.

Abstract: Tracking control apparatus includes a magnetic recording medium (disk or tape) comprising a dedicated servo track having recorded thereon a servo signal having a fixed spatial wavelength, and magnetic playback apparatus comprising a servo tracking head having an elongated tapered transducing gap transverse to the dedicated servo track. The transducing gap has (1) a relatively small magnetic gap length, at a first end of the gap, which is less than the spatial wavelength of the recorded signal, and (2) a relatively large magnetic gap length, at a second opposing end of the gap, which is greater than the spatial wavelength of the recorded servo signal. The servo head is in a desired tracking position when the segment of the tapered gap aligned with the servo track has a magnetic gap length that is equal to the spatial wavelength of the servo signal.

Abstract: A multi-track longitudinal magnetic tape head capable of writing data to high-coercivity magnetic tapes is disclosed. The multi-track, longitudinal magnetic tape head according to the present invention comprises a plurality of write elements and read elements. The write elements comprise a write pole separated from a substrate by a write gap. The write poles each comprise a block of magnetic material, having a planar gap surface and a convex top surface. A high B.sub.s composition is deposited on an etched portion of the magnetic material of each write pole at the gap surface. As a result, the gap surface comprises high B.sub.s composition extending from the top convex surface to a point part way down the gap surface. A method for manufacturing this multi-track longitudinal tape head is also disclosed.

Abstract: For the selection of the columns of elementary heads of a multitrack recording head, the method makes use of a bipolar pulse with amplitudes +2I/3 and -2I/3. For the selection of lines of elementary heads, it makes use of pulses with an amplitude of +I/3 or -I/3. And for the non-selected lines, it uses a bipolar pulse that is in phase opposition with respect to the column selection pulse and has amplitudes of +I/3 and -I/3.

Abstract: A core chip for a magnetic head core slider, including a first and a second core member which are bonded together so as to define a coil-winding aperture. The two core members cooperate to provide a gap-forming portion defining a magnetic gap on one side of the coil-winding aperture, and a cut-off portion provided adjacent to the gap-forming portion. The cut-off portion is removed by grinding at the top surface to establish the nominal depth of the magnetic gap. The cut-off portion has a distance marker which extends from the top surface down to the gap-forming portion and which has an end portion adjacent to the gap-forming portion. The end portion is shaped so as to indicate a distance between the top surface and the gap-forming portion, that is, the depth of the magnetic gap, when the cut-off portion is removed to provide a sliding surface of the core chip in which the magnetic gap is open. Also disclosed is a process of fabricating the magnetic head core slider using the core chip.

Abstract: A magnetic tape recording system which achieves very high track densities through utilization of a recording method and apparatus. A magnetic head is described in which the read head gaps are parallel to but laterally offset from the write head gaps. A head assembly is further provided in which the magnetic head is mounted on a rotary motor for aligning the head for writing and reading tracks at different azimuth angles, as well as a stepping motor and linear actuator for stepping the head between tracks. Also, a servo tracking method and apparatus is presented in which writing and reading take place under servo control. This servo allows alignment of the write head gap during writing, and the read head gap during reading, through observation of low frequency servo data blocks dynamically imbedded amidst adjacent track data. The utilization of this servo minimizes tracking error due to lateral tape motion.

Abstract: The magnetic head according to this invention comprises a core lamination structure which includes a recording/reproducing head and erase heads laminated on both sides of the recording/reproducing head, the end faces of the recording/reproducing head and the erase heads in the advance direction of the magnetic recording medium being formed as sloped surfaces not perpendicular to the laminated surface of the core lamination structure, and sliders which hold and fix the core lamination structure from both sides thereof. When the core lamination structure is to be held and fixed with sliders on its both sides, the ridges of the sloped surfaces are abutted on the reference surface of jigs which are used for lamination of the heads to correctly position the recording/reproducing head and the erase heads and to thereby facilitate setting of a precise interval distance between the magnetic gap for recording/reproducing and the gaps for erasing.

Abstract: A method of manufacturing a replicated magnetic reproduction medium, such as a magnetic-tape cassette provided with a music recording, which reproduction medium includes a magnetic tape having a plurality of tracks extending parallel to one another in the longitudinal direction at specified spacings within certain limits from one another. The reproduction medium thus manufactured serves for the reproduction of the replicated signals by a magnetic reproducing head having a plurality of transducing gaps situated at specified spacings within certain limits from one another. During reproduction, a specified normal tape tension within certain limits is sustained, resulting in a normal surface pressure between the tape and the head face of the reproducing head.During replication the tape is moved over a head face of a magnetic replication head also having a plurality of transducing gaps with a certain spacing from one another.The the tension in the tape is increased relative to the normal tension.

Abstract: This invention relates to a wide-write/narrow-read head having a pair of C-shaped cores one of which is used as a read core and the other of which is used as a write core, and a closure core which is provided between the two cores to shut off side magnetic circuits at the time of data reading. The closure is reduced in thickness at the tip end and is shaped to slope toward the read head so as to increase magnetic resistance from said closure core to said read core in order to prevent the magnetic flux extending between said write core and said closure core from leaking into said read core from said closure core.

Abstract: A track means defined by magnetic recording media on a substrate, the media along the track means having two levels, one for recording of data, and the other for recording of servo information, wherein recorded magnetic transitions at the second level define the servo information, the transitions arrayed along the track means as groups of converging lines which extend in crosswise or spanwise relation to multiple tracks. The data is recorded without any wasted magnetic space between tracks (zero guardband) using alternating angles (azimuthal) of magnetic orientation so that they do not interfere with each other when read. The read bead cores or gaps may be "oriented" to read recorded data transitions extending at different angles relative to track length direction.

Abstract: An analog/digital compatible reproducing system is disclosed, particularly a stationary head system using a digital recorded magnetic tape having a plurality of n, digital data recorded tracks. An analog recorded magnetic tape has a first analog recorded track and a second analog recorded track between which a guardband of a certain width is provided. Signals are reproduced from the digital recorded magnetic tape by driving n reproducing magnetic head elements respectively corresponding to the n digital data recorded tracks. The analog recorded magnetic tape is reproduced by driving a plurality of m reproducing magnetic head elements of said n reproducing, magnetic head elements, corresponding to the first and second recorded tracks so that common outputs can be produced from the m reproducing magnetic head elements. There is also disclosed a tape cassette used in such system.

Abstract: Complex magnetic head of the present invention eliminates relative magnetic interference between the magnetic heads and relative gap position drift between magnetic heads. The complex magnetic head has high performance and is compatible with lower rank FDDs. The complex magnetic head comprises R/W core track width regulation grooves (52a, 52b, 53a, 53b) filled with glass, erase core track width regulation grooves (55a, 55b, 56a, 56b) filled with glass, R/W core (18, 22) and erase core (20, 24) between shield members formed by these core track width regulation grooves (52a, 52b, 53a, 53b, 55a, 55b, 56a, 56b).

Abstract: A magnetic tape recording system which achieves very high track densities through utilization of a recording method and apparatus. A magnetic head is described in which the read head gaps are parallel to but laterally offset from the write head gaps. A head assembly is further provided in which the magnetic head is mounted on a rotary motor for aligning the head for writing and reading tracks at different azimuth angles, as well as a stepping motor and linear actuator for stepping the head between tracks. Also, a servo tracking method and apparatus is presented in which writing and reading take place under servo control. This servo allows alignment of the write head gap during writing, and the read head gap during reading, through observation of low frequency servo data blocks dynamically imbedded amidst adjacent track data. The utilization of this servo minimizes tracking error due to lateral tape motion.

Abstract: A magnetic head having a recording and/or reproducing magnetic gap and an erasing magnetic gap for writing and/or reading informational signals on and/or from a flexible disk is disclosed. A magnetic circuit comprises a front core having center cores and side cores and a rear core. The front core is sandwiched between a pair of sliders for assuring contact with the flexible disk. At least one of the sliders is provided with core reinforcing portions in positions corresponding to the cores and the side cores of the front core. The core reinforcing portions are in contact with the center cores and the side cores for reinforcing these cores.

Abstract: A magnetic head assembly having two magnetic heads for use on two sides of a magnetic head and arranged so as to use one common circuit to process signals from the two magnetic heads and so that the magnetic heads can be manufactured at a reduced cost. The magnetic heads are disposed on the two sides of the magnetic disk so that magnetic core blocks of the magnetic heads are located at different distances from the center of rotation of the magnetic disk. Recording/reproduction gaps of the magnetic core blocks are formed so that the depth of the recording/reproduction gap of the magnetic core block closer to the center of rotation of the magnetic disk is larger than the depth of the recording/reproduction gap of the other magnetic core block.

Abstract: A desired coded pattern such as a bar code is formed with two materials which are magnetically different, e.g., in permeability or conductivity. A sensor has primary coils which are excited by reference AC signals which are different in phase from each other, to produce an induced output signal. When at least one of the primary coils is moved relative to the pattern to approach the pattern, the induced signal produced in the primary coil changes in accordance with existence of a material in the pattern and the electrical phase of a composite output signal of the induced signals in the respective primary coils corresponds to the existence of the material in the pattern. By measuring the electrical phase of this induced output signal, therefore, the pattern corresponding to the existence of the material can be read on the basis of the measured data of the electrical phase.

Abstract: Disclosed are a magnetic recording and reproduction apparatus for a data processing unit, which includes a plurality of magnetic heads formed integrally by a thin-film forming technology, and a magnetic tape. A magnetic tape has a plurality of recording tracks corresponding to a plurality of independent data. The recording tracks are arranged in parallel to a moving direction of the magnetic tape and share the same starting position. A plurality of magnetic heads are arranged in parallel to a width direction of the magnetic tape to correspond to the recording tracks in a one-to-one correspondence, and are fixed at the starting position of the recording tracks. The magnetic tape is moved in a direction in which the starting position is away from the magnetic heads for data recording onto the magnetic tape and for data reproduction from the magnetic tape.

Abstract: A magnetic tape read/write head for variable track density forward and backward writing and checking after writing, incorporating a read gap and two larger write gaps arranged off center from the read gap on the axis of tape motion. Each pass of one of two write gaps writes a data band of the width of the write gap. A second pass in the same direction overwrites to some extent the previously written data band so as to define the width of the data track.

Abstract: A composite type magnetic head suitable for use in a magnetic recording and playback apparatus includes a main gap having an azimuth preset for recording and/or playing back a signal and a pair of pseudo gaps, each having an azimuth which is arranged to be not parallel to the main gap. The azimuth of the pseudo gaps is also arranged not to be parallel to the azimuth of the signal recorded on a recording track. With the above-described structure, the output level of a signal produced by the pseudo gap when recording or reproducing is reduced such that interference which the pseudo gap exerts upon a signal played back by the main gap is reduced, thereby eliminating deterioration in the signal-to-noise ratio.

Abstract: A thin film magnetic head for use with a magnetic recording medium having a direction of movement, includes a substrate and a plurality of magnetic read/write cores disposed on the substrate. At least a part of each core is formed of a magnetic thin film deposited on the substrate. Each of the cores includes a magnetic gap disposed between the magnetic read/write core and the substrate, the magnetic gaps being aligned with each other in the same position relative to the direction of movement of the magnetic recording medium. Each magnetic gap is separated an identical distance from the substrate, and each of the cores has a different width for forming a different width track on the magnetic recording medium.

Abstract: A magnetic head includes two substrates which are provided with magnetic cores of magnetic film on their surface and are bonded on a plane so that a magnetic gap is defined between the magnetic cores, an edge part of the magnetic cores with the magnetic gap facing to a track of a recording medium being thinned from opposite sides thereof, and the magnetic cores in any other part being thicker than the edge part. In a gap facing plane where a pair of the magnetic cores join together, the magnetic cores are registered with each other so that they can be opposed to each other in a larger width in the back gap than in the front gap. As a result, even if a tolerance of a process in manufacturing is considerably loosened, a magnetic head with high core efficiency can be obtained with a high yield.

Abstract: A high magnetic head for floppy disk drives that can prevent crosstalk between magnetic cores. Two nonmagnetic material pieces are joined with two magnetic material pieces, respectively, and track grooves and a winding groove are formed on a surface of each of the two magnetic material pieces. The nonmagnetic material pieces are joined together to form a core block with those surfaces facing each other on which the grooves are formed. The core block is cut to a plurality of front core assemblies. The core assembly includes a magnetic circuit having a magnetic gap, and nonmagnetic spacer members which do not form a magnetic circuit, thereby preventing crosstalk between the magnetic cores constituting the composite type magnetic head.

Abstract: For the accurate positioning of a magnetic head to a track of a moving recording medium in a magnetic layer memory system, particularly a magnetic tape recorder, whereby a magnetic head is displaceable to different tracks in the transverse direction of the recording medium, signals are respectively recorded in tracks that are formed of two sub-tracks separate from one another by a narrow space. A write head that contains two write sub-heads separate from one another by a gap is provided for this purpose. The signals are read from the sub-tracks by two read sub-heads provided in a read head, whereby the respective read sub-heads are fashioned shorter in the transverse direction of the recording medium than the respective sub-tracks. Dependent on read signals of the two read sub-heads, the magnetic head is displaced in the transverse direction of the recording medium such that the magnetic head follows the track with optimum precision.

Abstract: A magnetic head has a first magnetic core and a second magnetic core, a partition wall plate and sliders. The first and second magnetic cores are securely joined together through the partition wall plate in the widthwise direction of tracks of a recording medium. The sliders are disposed on the outer surfaces of the cores in the widthwise direction of the tracks. A surface of the partition wall that is opposite the recording medium is recessed from the sliding contact surfaces of the first and second magnetic cores and the sliders against the recording medium. This provides a concave groove which reduces the area of the sliding contact surface. Spacing loss by the magnetic head can be substantially extinguished and the wearing away of the recording medium can be avoided by air pressure produced in the concave groove.

Abstract: Thin film magnetic head structure includes digital read/write heads and analog read heads integrated on a single substrate. The "wrap around pole effect" is reduced or eliminated by having the thicknesses of the digital lower flux guides and the analog read gap-defining layer approximately the same, resulting in improved signal output from the digital read heads. The structure is useful in cassette decks designed to play both digital and analog compact cassettes.

Abstract: A write-read magnetic head for write-read digital recording machines includes a write magnetic head and a read magnetic head disposed in closely spaced apart relation. Each head includes a shield formed of a ferrous containing material having an opening therein in which the primary (write or read) gap is positioned. Each head includes a magnetic core comprised of a C-shaped core element and on I-shaped core element defining the primary (write) gap. A secondary gap is defined between the I-shaped core element and adjacent wall edge downstream of the write gap. When the recording head is energized, the shields and the secondary flux reduces flux leakages towards the read gap to permit effective reading while writing.

Abstract: A thin film tape head assembly is formed by depositing a multiplicity of thin film transducers on a ceramic wafer or substrate. The wafer is divided into head bars, each of which has one or more thin film transducers on its face. End sections and a cover bar are joined to the head bar to form a head bar subassembly. A flexible cable or electrical pins are provided between the end sections to enable electrical connection between the head circuit and external circuitry. By joining a number of head bar subassemblies, a multigap thin film tape head assembly is produced to serve as a read/write device.

Abstract: The structure of a magnetic head for use in a disk drive has an erase core and a read/write core which are inclined to a track of a floppy disk or disket. An erase gap and a read/write gap formed in the erase core and read/write core, respectively, each is inclined by a different angle to the longitudinal axis of the magnetic head. A shield plate is interposed between the two cores for magnetically shielding them from each other. With this configuration, the magnetic head reduces crosstalk ascribable to flux picked up by the erase core from the track.

Abstract: This invention relates to a wide-write/narrow-read head having a pair of C-shaped cores one of which is used as a read core and the other of which is used as a write core, and a closure core which is provided between the two cores to shut off side magnetic circuits at the time of data reading. The closure core is reduced in thickness at the tip end and is shaped to slope toward the rear head so as to increase magnetic resistances from said closure core to said read core in order to prevent the magnetic flux extending between said write core and said closure core from leaking into said read core from said closure core.

Abstract: A composite magnetic head comprises a pair of magnetic core halves each including a core block formed of an oxide magnetic material and a soft magnetic thin film disposed on said core block interposed with a reaction inhibiting layer, said core halves abutting to each other so that a magnetic gap is defined between the ends of said soft magnetic thin films. The magnetic head has a size relation bcd/a.ltoreq.0.2.times.10.sup.-10 m.sup.2 wherein a is a gap length, measured along the proceeding direction of a magnetic recording medium, c a gap depth, d a gap width as measured along the track width and b is a thickness of said reaction inhibiting layer. Wavy (beat) noise of output signal due to the psuedo gap produced by the reaction inhibiting layer is effectively suppressed.

Abstract: A multitrack head assembly has a plurality of magnetic heads arranged side-by-side along a transducing gap line extending across an upwardly facing tape-engaging surface which includes a series of elongated coplanar ribs alternating with low-pressure channels on both sides of and orthogonal to the gap line. For continuous in-contact recording, each rib is aligned with a particular one of the magnetic heads and has a width that is greater than the width of the transducing gap of the head with which it is aligned; furthermore, each rib has a gently curved tape-engaging surface with a radius of curvature R.sub.1 in a direction orthogonal to the gap line and a radius of curvature R.sub.2 in a direction substantially parallel with the gap line, where R.sub.1 and R.sub.2 are not necessarily the same.

Abstract: Apparatus, for duplicating magnetically recorded information by contact transfer from a master medium in the form of a magnetic rotatable drum to a slave medium in the form of a magnetic tape, includes a magnetic head, for initially recording the information to be duplicated on the magnetic drum, having a media-contact surface the curvature of which conforms to the curvature of the drum. The magnetic head is mounted with its media-contact surface essentially parallel with the surface of revolution of the drum, thereby enhancing signal-to-noise performance by suppressing spacing losses.

Abstract: A composite read-while-write magnetic head assembly includes a substrate having first and second opposing planar surfaces. An inductive record head of the thin film type is situated on the first planar surface, and a playback head of the magnetoresistive (MR) type is located on the second planar surface, in alignment with the record head. With an MR playback head and a thin film record head, the alignment between the two heads is limited by the precision of a photolithographic process, which is very accurate relative to the width of even the most narrow record track. Furthermore, the substrate is selected to be of sufficient thickness to isolate the MR playback head from the effects of fields created by the inductive record head, thereby eliminating crosstalk between the two heads.

Abstract: A contact recording head assembly arrangement capable of performing reliable read and write operations on magnetic tapes of varying thickness is provided. The head assembly includes a read island and a write island with gaps offset a distance from their centers to maintain signal integrity when processing the data signals stored and retrieved from the various tapes.

Abstract: A thin film magnetic head and a method for making the thin film head by the use of electrical lapping guides includes the use of a resistive lapping guide that has a height dimension and an electrical resistance that optimizes the results of the comparison of the resistive lapping guide to a finished lapping guide. The resistive lapping guide is not lapped during the lapping process. The finished lapping guide is lapped and the resistive comparison between the two determines the stopping of the lapping process. An as-lapped guide which is of the same dimensions as the finished lapping guide after lapping can also be included. An interleaved magnetic head having alternating magneto-resistive read elements and inductive write elements can be precisely lapped by sensing the resistance of the lapping guide elements and using a formula to determine the final resistance of the finished lapping guide to halt the lapping process.

Abstract: An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel format to accomplish the bi-directional motion of the tape media. The interleaved head includes two modules with each module having a plurality of alternating read and write transducers alternately spaced apart along a single line placed transverse to the movement of the magnetic tape. The two modules are placed together such that the write gaps of one module are aligned with the read gaps of the other module. Each read module includes the magneto-resistive element. Each write transducer includes a thin film conductor driving a nickel zinc ferrite substrate as one pole piece and a nickel zinc closure piece as the second pole piece.

Abstract: In the matrix magnetic head of the invention, the ferrite pads (4 to 8) of the magnetic circuits of the micro-heads are arranged quincunxially, and each pad is joined to the four neighboring pads by poles (9 to 12). There are therefore twice as many micro-heads as there are magnetic pads.

Abstract: A dual magnetic head capable of reducing unneccessary magnetic flux developed in erase cores. The dual magnetic head includes a first read/write core (30) having a first gap width (34) and extending in a track direction in which the tracks will be formed on a magnetic recording medium, a second read/write core (10) having a second read/write gap (14) with a width greater than the first gap width, and juxtaposed to the first read/write core (30) in a perpendicular direction to the track direction; and an erase core (20) having a pair of erase gaps (24, 25) located at opposite ends of the second read/write gap (14) with respect to the perpendicular direction, the erase core (20) being juxtaposed to the first read/write core (30) in the perpendicular direction and juxtaposed to the second read/write core (10) in the track direction, at least one of the facing surfaces of the erase core (20) which define the erase gaps (24, 25) therebetween being provided with an undulation.

Abstract: A magnetic sensor unit includes an elongated nonmagnetic sensor case, magnets, magnetic sensors, and positioning portions. The sensor case has a plurality of sensor housing recesses formed in a row in its upper surface in its longitudinal direction, and magnet housing recesses formed in a row in its lower surface at positions respectively corresponding to the sensor housing recesses. At least the upper surface of the sensor case is covered with a nonmagnetic cover. The magnets are respectively housed in the magnet housing recesses of the sensor case. The magnetic sensors are respectively housed in the sensor housing recesses of the sensor case and have magnetoelectric transducers magnetically biased by the magnets. The positioning portions are respectively formed in the sensor housing recesses of the sensor case and respectively position the magnetic sensors in a longitudinal direction thereof and a direction perpendicular thereto.

Abstract: An optical disc recording system for recording data on a writable type optical disc comprises a data signal forming circuit which causes, when program information is recorded program by program separately and with interruption and table-of-contents (TOC) information is recorded later, information at a part-of-the-way or intermediate position (intermediate information) among position information necessary for producing the TOC information to be recorded, during each interruption, at a position inside of a TOC area on an optical disc and causes this intermediate information to be read out when writing of program information is resumed for later utilization for generation of the TOC information thereby to shorten time required for generation of the TOC information.

Abstract: The magnetic encoder of the present invention includes a magnetic signal generating drum having plural magnetic pole lines respectively having different magnetization pitches. Magnetic signals are repeatedly generated from the plural magnetic pole lines. A magnetic sensor is provided which includes plural magnetic resistant effect elements for converting the respective magnetic signals generated from the plural magnetic pole lines into electric signals. The plural magnetic resistant effect elements respectively confront the plural magnetic pole lines and output electric signals of different pulse numbers in accordance with incident magnetic signals. The magnetic signals generated from the plural magnetic poles lines and incident on the magnetic resistant effect elements are less that an anisotropic magnetic field level of the respective magnetic resistant effect elements.

Abstract: An integrated head/flexure/conductor structure for the reading and writing of information with respect to a relatively moving medium, such as a disk or drum, and a method for manufacturing the same. The proposed structure takes the form of a micro-dimension, elongate dielectric flexure body, and embedded within such body both magnetic read/write pole structure, and electrical coil and conductor structure operatively associated with the pole structure. The flexure body and the embedded constituents are formed on an atom-by-atom basis utilizing one or more conventional material-deposition processes. The method [proposed by the invention] includes orthogonal-plane processing steps that facilitate formation of the magnetic pole structure in a way enhancing dimensional control.

Abstract: An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel format to accomplish the bi-directional motion of the tape media. The interleaved head includes two modules with each module having a plurality of alternating read and write transducers alternately spaced apart along a single line placed transverse to the movement of the magnetic tape. The two modules are placed together such that the write gaps of one module are aligned with the read gaps of the other module. Each read module includes the magneto-resistive element. Each write transducer includes a thin film conductor driving a nickel zinc ferrite substrate as one pole piece and a nickel zinc closure piece as the second pole piece.

Abstract: A thin film magnetic head includes first and second head chips, each of the head chips having a substrate, a reproducing head portion provided in a side edge portion on the substrate, and a protecting plate convering the reproducing head portion and the recording head portion. The reproducing head portion and the recording head portion are formed of a lower magentic layer, an electroconductive coil layer, an upper magnetic layer and insulation layers interposed therebetween, deposited in stacked relation on the substrate one after another.

Abstract: A method for manufacturing a magnetic transducer head in which a track width regulating grooves provided on both edges of a magnetic gap are filled by blowing a powder beam of nonmagnetic material having a very fine particle size to deposit the nonmagnetic material in the grooves. A pair of magnetic core members are bonded together to form a magnetic gap therebetween by providing a metal layer of a bonding surface of the core members and applying a pressure to the core members under an elevated temperature to cause a mutual diffusion of the metal to bond the core members together. Thus the magnetic transducer head can be made without using a high-temperature heat treatment.

Abstract: A magnetic head comprises first and second front core assemblies and a filler plate. The first front core assembly is connected to a back core to form a magnetic core such as a recording/reproduction core or an elimination core. The second front core assembly, which is arranged parallel to the first front core assembly, is connected to a back core to form a magnetic core such as an elimination core. Between the first and second core assemblies is arranged a filler plate having a shape which substantially corresponds to the combined shape of both front core assemblies superimposed one on another. The filler plate is made of a non-magnetic ferrite or ceramics.

Abstract: A magnetic head includes a head core having a top surface with a magnetic gap for contact with a magnetic record medium and a pair of sections of a laminar slider bonded onto the top of the head core such that their top surface is flush with the core top surface to form a slider surface, thereby eliminating any sliders which have been bonded to sides of the head core.

Abstract: A floating type composite magnetic head includes a head core fixed to a slider formed of nonmagnetic material. In the head core, a pair of magnetic core halves are abutted against each other with nonmagnetic material such as SiO.sub.2 or the like interposed therebetween. The first and second magnetic core half members have first and second gap forming surfaces to be abutted against each other to define a magnetic gap (g), respectively. A first groove is formed on the second gap forming surface. A glass layer is formed in the first groove. A first thin film including a ferromagnetic metal thin film is selectively formed on the first gap forming surface. A second thin film including a ferromagnetic metal thin film is selectively formed on the second gap forming surface so that at least a portion except the surface of the glass layer in the second gap forming surface is exposed. A second groove is formed on the exposed second gap forming surface adjacent to the first groove.