In a magnet unit comprising a plurality of magnets arranged such that end faces of adjacent ones of the magnets lie in opposed relation, it is intended to enable a surface magnetic flux distribution to have a sinusoidal wave even at a position of an inter-edge gap. Disclosed is a rare-earth permanent magnet-forming sintered body having an integral sintered structure of magnet material particles containing a rare-earth substance. The integral sintered structure is formed in a three-dimensional shape having: a cross-section with a shape defined by a radially outer-side arc-shaped surface having a first curvature radius, a radially inner-side arc-shaped surface having a second curvature radius less than the first curvature radius and having an arc shape concentric with the outer-side arc-shaped surface; and a first end face and a second end face each of which is a radially-extending face along a virtual radial line extending from a curvature center of the arc shapes; and an axial length extending in a direction perpendicular to the cross-section. Each of the outer-side and inner-side arc-shaped surfaces has a circumferential length corresponding to an angular range 2ω between the two virtual radial lines defining, respectively, the first and second end faces. The magnet material particle are magnetized such that, among easy-to-magnetize axes thereof: easy-to-magnetize axes lying on a central radial line connecting the curvature center and a circumferential center point of the outer-side arc-shaped surface are oriented radially outwardly along the central radial line; easy-to-magnetize axes lying in a central region 2(1 - ε) ω, except for opposite end regions defined as two regions each extending over an angular range εω from a respective one of the first and second end faces, are oriented, at a position on an arbitrary radial line located at an angle θ from the central radial line, in a direction deviated from a radially outward direction along the arbitrary radial line, toward the central radial line by an angle Φ; and easy-to-magnetize axes lying in each of the end regions are oriented in a direction deviated radially outwardly at an angle greater than the angle Φ by 5° or more, wherein ε denotes a value falling within the following range: 0.1 ≤ ε ≤ 0.6, and Φ denotes an angle set based on the following formula: Φ = (90° - d) · θ / ω, where d denotes a constant set to an angle falling within the following range: 0° < d ≤ 5° .

A coil component has a core part 10 composing a closed magnetic path through which a closed loop of a magnetic flux passes, the magnetic flux being generated by two coils 14A , 14B that are arranged in parallel, and generate a magnetic field, and the core part 10 has a pair of I-type base cores 11A, 11B facing each other, and a pair of coupling core parts 11C, 11D. The coupling core parts 11C, 11D are each formed by linearly aligning three unit coupling cores 12A to 12F, and each of these cores 12A to 12F is formed into a configuration in which a column-shaped projection is provided on a core body, and a two-stage gap including a small gap and a large gap is to be formed mutually in a space in the adjacent unit cores 11A, 11B, and 12A to 12F by the configuration.

The present invention concerns a magnetic orienting cylinder and a process for producing such magnetic orienting cylinder, wherein said cylinder is for producing a security thread or stripe for the incorporation into or onto a value-document or currency substrate. The process for producing such magnetic orienting cylinder comprises the coating of a cylindrical support body with a polymer material comprising a high-coercivity permanent-magnetic powder as a filler material, and magnetizing or engraving the seamless outer cylinder surface to form on the cylinder a repetitive seamless magnetic field pattern. The thread or stripe comprises a plastic foil which carries a hardened coating comprising oriented magnetic or magnetizable pigment particles, the orientation of said pigment particles representing graphic information. Preferred are optically variable magnetic or magnetizable pigment particles. Said hardened coating may also be comprised between a first and a second plastic foil. Said graphic information is a repetitive seamless pattern of suitable repetition length, which is produced using a magnetic orienting cylinder having a corresponding repetitive seamless magnetic field pattern.