Abstract: The present invention implements a magnetic disk drive usable under a wide range of temperature environment conditions, and a magnetic head assembly. The flying height of a magnetic head slider (1) can be controlled against a change of temperature so that the flying height of the magnetic head slider (1) is low at low temperatures and high at high temperatures, thereby the variations of the coercivity of a magnetic disk (2) can be cancelled. Further, by setting the rate of change of the crown value with respect to the change of temperature to 0.26 to 0.62 nm/° C., the flying height can be controlled so that the flying height becomes low at low temperatures and high at high temperatures, while maintaining the uniformity of the profile of the flying height of the magnetic head slider (1) from the inner periphery to the outer periphery of the magnetic disk (2).

Abstract: The present invention implements a magnetic disk drive usable under a wide range of temperature environment conditions, and a magnetic head assembly. The flying height of a magnetic head slider (1) can be controlled against a change of temperature so that the flying height of the magnetic head slider (1) is low at low temperatures and high at high temperatures, thereby the variations of the coercivity of a magnetic disk (2) can be cancelled. Further, by setting the rate of change of the crown value with respect to the change of temperature to 0.26 to 0.62 nm/° C., the flying height can be controlled so that the flying height becomes low at low temperatures and high at high temperatures, while maintaining the uniformity of the profile of the flying height of the magnetic head slider (1) from the inner periphery to the outer periphery of the magnetic disk (2).

Abstract: The constitution includes a common shield having both shield function and lower magnetic core function, a recording gap formed on the common shield, having specified gap length and gap depth, an upper magnetic core disposed oppositely to the common shield through the recording gap, and a pair of shunt members made of a soft magnetic material formed at the side of the recording gap, being magnetically insulated from the common shield and upper magnetic core through a nonmagnetic layer. It hence presents a thin film magnetic head and its manufacturing method capable of suppressing the leak magnetic field generated in the recording gap, decreasing the recording fringe substantially, narrowing the track of the recording head, and enhancing the recording track density.

Abstract: A method and apparatus for analysis of magnetic characteristics of a magnetic device used for designing a magnetic head. The magnetic head has recording and reproducing characteristics and a recording and reproducing apparatus of magnetic characteristics. The apparatus for analysis of magnetic characteristics includes a data input part, a coupled analysis part, and a result output part. The data input part is provided with data related to the characteristics of substances composing the magnetic device, data related to the magnetic device divided into a plurality of parts, data concerning the boundary conditions for analysis of the magnetic device, and data concerning the boundary conditions for analysis of the magnetic field.

Abstract: A head cleaner for a magnetic recording and/or reproducing apparatus for cleaning rotary magnetic heads. The head cleaner includes a rotary spindle rotatably mounted on a support arm movable between an operative position, in which the head cleaner is in position to clean the magnetic heads, and an inoperative position separated from the magnetic heads. The head cleaner also includes a plurality of oblong webs of non-woven fabric with or without an abrasive material coated on one surface thereof. The oblong webs of non-woven fabric are fixedly secured to the rotary spindle so as to extend radially outwardly therefrom while being spaced an equal distance from each other in a direction circumferentially thereof.

Abstract: A head cleaner for a magnetic recording and/or reproducing apparatus for cleaning rotary magnetic heads. The head cleaner includes a rotary spindle rotatably mounted on a support arm movable between an operative position, in which the head cleaner is in position to clean the magnetic heads, and an inoperative position separated from the magnetic heads. The head cleaner also includes a plurality of oblong webs of non-woven fabric with or without an abrasive material coated on one surface thereof. The oblong webs of non-woven fabric are fixedly secured to the rotary spindle so as to extend radially outwardly therefrom while being spaced an equal distance from each other in a direction circumferentially thereof.

Abstract: A method and device for generating mesh to be used in numerical analysis for regions of an object to be analyzed, the regions of an object to be analyzed being input as data for a geometric model which defines their geometric form in a coordinate system which is set as a standard. This geometric model is then divided into equal parts in the coordinate directions of the coordinate system to generate blocks. After this, the vertices, endpoints and points of the shapes formed by the intersection or touching of the boundaries of the geometric model and each of the generated blocks are extracted. These extracted points, along with the vertices, endpoints and points of the geometric model and the vertices of the generated blocks, are set as nodes. Finally, mesh elements are generated for each block using the nodes.

Abstract: A method and device for generating mesh to be used in numerical analysis for regions of an object to be analyzed, the regions of an object to be analyzed being input as data for a geometric model which defines their geometric form in a coordinate system which is set as a standard. This geometric model is then divided into equal parts in the coordinate directions of the coordinate system to generate blocks. After this, the vertices, endpoints and points of the shapes formed by the intersection or touching of the boundaries of the geometric model and each of the generated blocks are extracted. These extracted points, along with the vertices, endpoints and points of the geometric model and the vertices of the generated blocks, are set as nodes. Finally, mesh elements are generated for each block using the nodes.

Abstract: A head cleaning device for use in a magnetic recording and reproducing apparatus comprises a cleaning roller in which a lubricant with an excellent lubricating action under low humidity conditions impregnates the soft material. This lubricant compensates for the drop in the natural lubricating action resulting from a moisture deficiency, and therefore prevents the production of seized deposits. Furthermore, the head cleaning device comprises a first cleaning portion impregnated with polymer resin and abrasive particles, and a second cleaning portion comprising only a soft material, the second cleaning portion can remove by wiping any abrasive particles or deposits left on the magnetic head surface immediately after the abrasive cleaning action of the first cleaning member.

Abstract: A head cleaning device for use in a magnetic recording and reproducing apparatus comprises a cleaning roller in which a lubricant with an excellent lubricating action under low humidity conditions impregnates the soft material. This lubricant compensates for the drop in the natural lubricating action resulting from a moisture deficiency, and therefore prevents the production of seized deposits. Furthermore, the head cleaning device comprises a first cleaning portion impregnated with polymer resin and abrasive particles, and a second cleaning portion comprising only a soft material, the second cleaning portion can remove by wiping any abrasive particles or deposits left on the magnetic head surface immediately after the abrasive cleaning action of the first cleaning member.

Abstract: A method and apparatus for analysis of magnetic characteristics of a magnetic device used for designing a magnetic head. The magnetic head has recording and reproducing characteristics and a recording and reproducing apparatus of magnetic characteristics. The apparatus for analysis of magnetic characteristics includes a data input part, a coupled analysis part, and a result output part. The data input part is provided with data related to the characteristics of substances composing the magnetic device, data related to the magnetic device divided into a plurality of parts, data concerning the boundary conditions for analysis of the magnetic device, and data concerning the boundary conditions for analysis of the magnetic field.

Abstract: A head cleaning device for use in a magnetic recording and reproducing apparatus comprises a cleaning roller in which a lubricant with an excellent lubricating action under low humidity conditions impregnates the soft material. This lubricant compensates for the drop in the natural lubricating action resulting from a moisture deficiency, and therefore prevents the production of seized deposits. Furthermore, the head cleaning device comprises a first cleaning portion impregnated with polymer resin and abrasive particles, and a second cleaning portion comprising only a soft material, the second cleaning portion can remove by wiping any abrasive particles or deposits left on the magnetic head surface immediately after the abrasive action of the first cleaning member.

Abstract: A multitrack magnetic head for use with a magnetic tape in a magnetic recording and reproducing system includes at least two magnetic head tips disposed adjacent to each other and movable with respect to the magnetic tape. The head tips include a leading head tip for initial sliding contact with the magnetic tape and a trailing head tip for subsequent sliding contact with the magnetic tape. The leading head tip is made of a material whose wear resistance is greater than that of a material of which said trailing head tip is made. The head tips are held in good sliding contact with the magnetic tape for better recording and reproducing characteristics.

Abstract: A levitation phenomenon analyzer includes: a data input portion for reading data on fluid and structural components and minute structures of a device; a levitation analysis portion for solving basic simultaneous equations of the fluid and the structural components on the basis of the data; and a result output portion for outputting analytical results of the levitation analysis portion; wherein by regarding a flow path of the fluid for levitation analysis as a mean thickness of a air film or regarding the pressure of the fluid as a mean pressure, shapes of the minute structures which are independent of coordinates of nodal points are handled.

Abstract: A head cleaning device for use in a magnetic recording and reproducing apparatus comprises a cleaning roller in which a lubricant with an excellent lubricating action under low humidity conditions impregnates the soft material. This lubricant compensates for the drop in the natural lubricating action resulting from a moisture deficiency, and therefore prevents the production of seized deposits. Furthermore, the head cleaning device comprises a first cleaning portion impregnated with polymer resin and abrasive particles, and a second cleaning portion comprising only a soft material, the second cleaning portion can remove by wiping any abrasive particles or deposits left on the magnetic head surface immediately after the abrasive cleaning action of the first cleaning member.

Abstract: A multitrack magnetic head for use with a magnetic tape in a magnetic recording and reproducing system includes at least two magnetic head tips disposed adjacent to each other and movable with respect to the magnetic tape. The head tips include a leading head tip for initial sliding contact with the magnetic tape and a trailing head tip for subsequent sliding contact with the magnetic tape. The leading head tip is made of a material whose wear resistance is greater than that of a material of which said trailing head tip is made. The head tips are held in good sliding contact with the magnetic tape for better recording and reproducing characteristics.

Abstract: In order to prevent the staining of magnetic heads of a magnetic recorder in a low humidity environment, a refrigeration device which refrigerates a magnetic tape is positioned so as to engage the magnetic tape prior to the tape engaging the magnetic heads. The refrigeration device comprises either a refrigeration post or a refrigerated semi-closed space and functions to transfer water to the magnetic tape.