Abstract: A method of making a magnetic recording and/or reproducing head having a head support and a head core. The head core is inserted in a slit defined in the head support and is retained in position on the head support by means of a fixing jig to hold the head core immovable relative to the head support. Thereafter, a glass frit for temporarily fixing the head core relative to the head support is fused by the application of a laser beam to partially connect the head core and the head support together. After the fixing jig has been removed and a glass frit has been mounted on the head support so as to cover the slit above the head core, the assembly is loaded into a heating furnace to fuse the glass frit thereby to permanently interlock the head core and the head support together.

Abstract: A method for processing a work, which is running in a direction, by making reciprocal scanning of laser beams and by repeatedly processing substantially parallel processing lines. By determining the scanning velocity vector of the laser beam by operation of the running velocity vector of the work and the relative processing velocity vector to the work, the processing lines are effectively formed.Furthermore, by inclining the work in a manner that the maximum angle made by the work and the laser beam is other than the right angle, the intensity of the laser beam is stabilized.

Abstract: An edge-rounding method and an apparatus therefor, for chamfering the peripheral edge of a workpiece having a planar surface by causing the peripheral edge to be be engaged under pressure with a grinding surface of a grinding device. The grinding device employed is of two types, one type being a grinding cylinder having a grinding surface and the other type being an abrasive tape having an abrasive surface and moved around a rotary drum. The edge-rounding is performed on the workpiece so as to satisfy the relationship of [(x/r)-(L/2r)]<0.015, wherein r represents the radius of the grinding surface, L represents the minimum dimension of the planar surface during the rotation of the workpiece and x represents the distance between the plane in which the workpiece pivots and the axis of rotation of the grinding device.

Abstract: An edge rounding machine for performing edge rounding of an outer edge portion of a machining face of a workpiece such as a floppy disk head, etc., including a cylindrical rotary member having, at its outer periphery, cutting edges, a holder for supporting the workpiece such that the machining face of the workpiece is brought into contact, at the outer edge portion, with a grinding face of the cylindrical rotary member at an angle, a rotary device for rotating the workpiece about its rotary centerline perpendicular to the machining face, a pivotal device for pivoting the workpiece, a support member for retractably guiding the holder along the rotary centerline of the workpiece, and an urging device for urging the workpiece towards the grinding face.