Abstract:
A system and method for magnetic transfer. A magnetic transfer device includes a plurality of pairs of magnetic field generating units that apply a magnetic field to a contact body which includes a master disk in close contact with a magnetic recording medium, wherein the master disk has a pattern of preformatted signals. The magnetic field generating units, falling within a specified length range, are moved in synchrony at a predetermined speed in the directions of the outer periphery while the contact body is caused to rotate by a rotation drive unit. The system and method provide a magnetic transfer method and a magnetic transfer device that, by reducing the area of magnetic field generating units that apply a transfer magnetic field, can reduce an attractive force (or repulsive force) between the magnets, and furthermore, shorten a processing time for the transfer.
Abstract:
A master disk for magnetic transfer of a reference servo signal in a spiral mode, having a pattern including a plurality of dots groups, which are disposed at different radial positions of the master disk with a first pitch, and correspond to the reference servo signal in the spiral mode. Each of the plurality of dot groups includes a plurality of dots, successively disposed with a second pitch along a circumferential direction of the master disk at a same one of the radial positions. Each of the plurality of dots is of a ferromagnetic material, and has four sides, two opposing sides thereof extending in the circumferential direction, and the other two opposing sides thereof extending in a radial direction of the master disk.
Abstract:
A method of manufacturing a master disk for magnetic transfer is provided in which a pattern configuration does not change and burrs that require a polishing process are not generated. The method of manufacturing a master disk for magnetic transfer can include preparing a nonmagnetic body, forming a pattern of recessed parts on the nonmagnetic body, and forming a ferromagnetic material layer by depositing a ferromagnetic material on a surface of the nonmagnetic body having the pattern of recessed parts thereon. The method can further include forming a pattern of ferromagnetic material layers at the recessed parts by removing an excess portion of the ferromagnetic layer without using a mask. An etching rate of the nonmagnetic body can be larger than an etching rate of the ferromagnetic material layer in the operation of forming a pattern of ferromagnetic material layers at the recessed parts.
Abstract:
The present invention relates to a difructose anhydride (DFA)-containing composition and use thereof. DFA is a cyclic disaccharide in which the reducing termini of two fructose molecules bind each other to hydroxyl groups at the other nonreducing termini.According to the present invention, it has been revealed that DFA is effective in accelerating the absorption of magnesium, zinc or copper, accelerating bone formation, accelerating diuretic action, and improving bowel movement and is useful in inhibiting dental caries.A composition of the present invention can be used as a composition for a medicinal product and a food or drink product (including feed for animal use). Examples of a medicinal product and a food or drink product for human or animal use include formulated powder milk, parenteral nutrients, health food and drink products, and additives for feed and are not particularly limited as long as they are ultimately in an orally administrable form.
Abstract:
A hydraulic fluid composition for power steering is disclosed, which comprises (a) at least one phosphorus containing compound selected from the group of alkyl, or alkyl substituted or unsubstituted phenyl phosphorus acid compounds, alkyl, or alkyl substituted or unsubstituted phenyl phosphorus thioacid compounds, alkyl, or alkyl substituted or unsubstituted phenyl phosphorus dithioacid compounds, and (b) one or more thiadizaole derivatives represented by the formula: ##STR1## where R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1 to 12 carbons. The composition enables hydraulic systems to be used for longer times without accelerating deterioration of rubber materials employed in the hydraulic system.
Abstract:
A panel for an automotive vehicle and the method of making same. A main reinforcing member is bonded to an outer panel, the reinforcing member being made of a hardened thermosetting material. An auxiliary reinforcing member is attached to and covers the entire inner side of the main reinforcing member. A core element of foamed resin is encapsulated between the outer panel and the main reinforcing member and causes the latter to bulge in the inward direction to form a rib-like projection to strengthen the panel.