Abstract: A longitudinal recording head for use with magnetic recording media includes a gapless yoke with a cavity that expels magnetic flux onto a small area of the magnetic recording medium. Longitudinal recording heads incorporating the gapless yoke and flux cavity are capable of improved recording densities.

Abstract: A head actuator assembly comprises a plate-like suspension having a distal end portion mounting with a magnetic head, and a trace having a relay FPC attached to the suspension through a lining plate. A head IC is mounted on the relay FPC and positioned near the magnetic head. In an area which faces the head IC, insulation layers of the FPC are removed, and an opening is formed in the lining plate and suspension. A wiring pattern of the relay FPC is exposed through this opening.

Abstract: A tape cartridge having an identification hole for the prevention of accidental removal of recorded information or for no erasing formed in a housing of the cartridge and an additional identification hole formed in the vicinity of the first hole for a different purpose, both of the holes being adapted to engage with a no-erasing member which opens or closes the same. The no-erasing member when incorporated in the cartridge is able to open or close the no-erasing identification hole depending on the position of the member itself while normally closing the different-purpose identification hole and, when not incorporated in the cartridge, it allows the different-purpose identification hole to remain open whereby the tape cartridge is identified to be a different one. The two identification holes may be united into one. The different-purpose identification hole may be a hole intended for the identification of a cleaning cartridge.

Abstract: A magnetic tape head assembly comprised of read and write elements and servo readers placed asymmetrically about the center of the head taken perpendicular to the direction of tape motion is provided. The tape head is capable of reading and writing in two directions of tape motion.

Abstract: A perpendicular magnetic recording head includes a perpendicular writing pole and a longitudinal field generator which rotates the magnetization of the perpendicular recording media prior to writing, thereby facilitating magnetization switching. The longitudinal magnetic field may be provided by a narrowed gap between the trailing write pole and the leading return pole of the head. The gap structure is designed to provide a fringing magnetic field between the poles which generates the longitudinal magnetic field in perpendicular recording media as the media travels under the perpendicular writing pole.

Abstract: In a magnetic tape drive including a magnetic head for accessing a magnetic tape traveling along a traveling path, a sensor is provided for detecting behavior of the magnetic tape. A flexible circuit board is connected to the sensor. A hook is disposed in the vicinity of the sensor. The circuit board is folded to form a curved portion between the circuit board and the hook.

Abstract: A magnetic head including an MR head and a write head exposed to a medium-sliding surface. The MR head includes a magnetoresistive element and slides over a magnetic recording medium to read information magnetically recorded in the magnetic recording medium. The MR head further includes a shield layer and a shield core layer which includes a shield section and a core section. A smear-preventing layer is provided between the shield section and the core section in the shield core layer, the smear-preventing layer protruding from the medium-sliding surface farther than at least the core section. The write head includes a gap layer and a thin-film coil section deposited in that order on the shield core layer, and a magnetic core layer deposited over the gap layer and the thin-film coil section so as to be insulated from the thin-film coil section.

Abstract: A system having a simple structure and highly precise data reproduction in which a disk tray is attached to a tray ascending/descending unit driven to be ascended or descended within a mechanical deck such that it can be loaded or unloaded in a horizontal direction, and one motor-type loading drive mechanism installed in the tray ascending/descending unit performs a pulling-in drive of the disk tray, a descending drive of the tray ascending/descending unit, a ascending drive of the tray ascending/descending unit and a pulling-out drive of the disk tray, respectively.

Abstract: An optical recording method which comprises making a recording with near field light on an optical recording medium comprising a substrate having provided thereon a particle layer containing particles having an average particle size ranging from 1 to 50 nm.

Abstract: An optical disk adjusting assembly for an optical disk reading device. The optical disk adjusting assembly includes a chassis, a first guide rod, a second guide rod, an adjustable positioning element, a clamping plate, a disk rotating module and a disk reading module. The first guide rod and the second guide rod are respectively disposed on the chassis. The adjustable positioning element constrains two ends of the first guide rod and one end of the second guide rod. The clamping plate is secured to the chassis by screws and used to restrain a portion of the adjustable positioning element. Thus, the adjustable positioning element can constrain and adjust the two guide rods efficiently.

Abstract: A disc cartridge includes at least a magneto-optical disc and a cartridge (upper shell) storing the magneto-optical disc in a rotatable manner and having an opening provided in a region including a position corresponding to a predetermined rotation center of the magneto-optical disc. The opening is longer on a forward side in the disc cartridge insertion direction (on the Y-direction side) with respect to the position corresponding to the rotation center than on a backward side in the disc cartridge insertion direction (on the X-direction side) along a straight line passing through the position corresponding to the rotation center and parallel to the disc cartridge insertion direction. Thus, a disc cartridge and a disc unit which are constructed to allow the disc cartridge to be smoothly loaded are provided.

Abstract: A rotary tray having a plurality of disk mounting sections is pivotally supported by a central shaft arranged on a tray support face of a casing, a rim protruding from a lower face of the rotary tray is movably set on a sliding face block arranged in an outer circumferential section of the tray support face, and disk mounted on a desired disk mounting section is opposed to an optical pickup when the rotary tray is intermittently rotated by a predetermined angle, and the sliding face block is engaged in a space formed between a recess step circumferential face, which is formed along an inner edge of an outer circumferential section of the tray support face, and a support frame integrally formed in the outer circumferential section and being opposed to the recess step circumferential face.

Abstract: A single reel with magnetic tape wound thereon is housed in a case. A restraining member, for restricting rotation of the reel by moving toward or away from the reel, is urged in a restraining direction by an urging member. The pushing-up portions of a releasing member are inserted into the through holes bored in the reel gear of the reel 2 so that the lower ends can abut a driving gear. The releasing member moves the restraining member in a releasing direction by moving according to the chucking operation of drive-side rotation drive means. In this manner, reel-rotation restraining means allows rotation of the reel when being used and restricts the rotation when not being used. In this construction, each of the through holes is bored between the tooth edges of the reel gear so that the releasing member can perform a reliable releasing operation.

Abstract: A spin valve read element for use with, for example, magnetic recording media, includes a permanent magnet as one of the multilayers that make up the spin valve. The spin valve may also include a pinned ferromagnetic layer, an antiferromagnetic coupling inducing layer, a reference ferromagnetic layer, an electroconductive layer, and/or a free ferromagnetic layer. Epitaxy breaking layers may also be advantageously positioned within the spin valve. The multilayers of the spin valve may be constructed as a current perpendicular to the plane or a current parallel to the plane type spin valve.