Abstract: A fine crystalline thin wire of a cobalt base alloy having a composition of the formula;CokMlBmSinwhere Co is cobalt; M is at least one of the transition metals of groups IV, V and VI of the periodic table; B is boron; Si is silicon; K, l, m and n represent atom percent of Co, M, B and Si, respectively, and have the following values:k=40-78l=10-50m=2-15n=8-20and the fine crystal grains in the thin wire having an average size of no more than 5 .mu.m.

Abstract: A heat transfer medium composed of a base material having thereon in order outwardly from the base material;(a) a colorless or light color heat-fusible transfer layer (A) containing from about 55 to 95 wt % of a wax and from about 5 to 45 wt % of a thermoplastic resin compatible with the wax, based on the whole amount of layer (A); and(b) a heat-softenable ink layer (B) containing from about 50 to 90 wt % of a thermoplastic resin incompatible with the wax in the layer (A) and having adhesion upon heating, from about 3 to 30 wt % of a heat-fusible lubricant, and a coloring material, based on the whole amount of layer (B);the viscosity of layer (A) being from about 100 c.p. to 1,000 c.p. at a temperature 20.degree. C. higher than the melting point of layer (A) shown by a differential scanning calorimeter.The heat transfer medium provides transferred images excellent in rubbing resistance and distinctness.

Abstract: An ink ribbon cassette for supplying ink from an ink-impregnated material to an ink ribbon in which the ink-impregnated material is loaded directly in the cassette body without an ink tank, and in which leakage of ink caused, for instance, by vibration or sudden temperature change, is positively prevented. The ribbon cassette includes a cassette body having a container formed as an integral part thereof and a cover fixedly secured to the cassette body. The container accommodating the ink-impregnated material is formed in such a manner that a space is formed between the ink-impregnated material and the cover, and an ink pool having a capillary action is formed on the inner surface of an outer peripheral wall defining the container.

Abstract: An erasable ball-point pen ink is disclosed. The ink is comprised of a rubber component, a volatile solvent, an organic pigment and a nonvolatile solvent, which additionally contains fine powders of silicon dioxide formed by the hydrolysis of silicon tetrachloride, the hydrolysis being carried out by a high temperature gas phase reaction; a semisolid substance; a soft solid substance having a melting point of not more than 130.degree. C.; a combination of fine powders of silicon dioxide formed by the hydrolysis of silicon tetrachloride, the hydrolysis being carried out by a high temperature gas phase reaction, and a semisolid substance; or a combination of fine powders of silicon dioxide formed by the hydrolysis of silicon tetrachloride, the hydrolysis being carried out by a high temperature gas phase reaction, and a soft solid substance having a melting point not higher than 130.degree. C.

Abstract: A magnetic display unit in which a magnetic panel encloses a colored liquid in which magnetic particles are dispersed. A recording head moves over the panel and has a plurality of electromagnets arranged with at least three electromagnets on each of parallel lines inclined to the direction of movement of the recording heads with all the electromagnets being arranged on equal pitch perpendicular to this movement direction. The electromagnets are selectively actuated as the recording head moves to write a dot pattern.

Abstract: A visible image magnetic card employing a magnetic recording sheet having a sandwich of a magnetic recording layer and a base sheet. A display sheet has a transparent display area with a display cell is formed between the display sheet and the magnetic recording sheet. The cell houses a mixture of magnetic particles and a transparent or translucent fine fluidizing powder.

Abstract: A ball-point pen for water-soluble ink having a barrel with a vent hole, a cylindrical ink reservoir covered except at its exposed front and rear ends, and an ink feed core for supplying ink from the reservoir to a ball at the pen writing tip is provided with a hollow inner cover member comprising a cylindrical holding part for covering and holding a relatively long front portion of the reservoir and a cylindrical shielding part for partitioning the front exposed part of the reservoir and the feed core from the vent hole, the inner cover member being secured within the barrel by press-fitting the front end of the shielding part into a bore of the front end part of the barrel. Passages are provided for communication between the vent hole and the rear exposed end of the reservoir. Leakage of ink due to causes such as temperature change and impact force imparted to the barrel in the longitudinal direction thereof is thereby prevented.

Abstract: A white or grayish white substance can be formed by dipping, in the first step, aluminum or an aluminum alloy having an anodically oxidized film in a first solution containing a specific salt or electrolyzing with said first solution, thereby causing the product from this salt to enter into the micropore of said film and then, in the subsequent second step, dipping the product from the first step in a second solution containing a substance which reacts with the product from the salt to be converted into a white or grayish white compound or electrolyzing with said second solution.

Abstract: An XY plotter apparatus includes a magnetic panel, a writing tool for applying a magnetic field, a writing tool drive and an erasing magnetic field generator. The writing tool consists of an electromagnet which is arranged so that specified characters and figures may be displayed at a high speed on a magnetic panel by the writing tool. Data of a figure to be displayed is inputted into the writing tool drive so as to generate signals for position control and a signal for actuating a switch for a coil inside the electromagnet.

Abstract: A magnetic display panel in which syneresis is completely eliminated between a colorant and a dispersion medium by the simultaneous use of organic and inorganic thickener. A liquid sealing space is provided between two substrates sealed by an adhesive in which space a dispersing liquid having a yield value of at least 5 dyne/cm.sup.2 is filled. The dispersing liquid is composed of fine magnetic particles, a colorant, a dispersion medium and the organic and inorganic thickeners. The organic thickener is preferably one of olefinic polymer, olefinic copolymer, wax, metal soap and dextrin fatty acid ester while inorganic thickener is preferably one of fine powder silicic acid and fine powder silicate.

Abstract: An erasable ball-point pen ink is described comprising a rubber component, a volatile solvent, a pigment and a nonvolatile solvent, said ink further containing at least one dispersant that is liquid at room temperature and completely soluble in said volatile solvent and which is selected from the group consisting of alkyl phosphate esters, amines and oxyethyleneoxypropylene block copolymers, by which a ball-point pen is available that ensures a very smooth ink flow and letter writing during any season of the year without blocking of the small clearance between the writing ball and the ball holder even when the writing tip is uncapped and exposed to the atmosphere for a prolonged period. The ink is particularly adapted to be used with ball-point pens for writing fine letters.

Abstract: An erasable black ink composition for use in ball-point pens is disclosed. The composition comprises rubber, a low boiling solvent, a black pigment, a quality adjuster and a lubricant, wherein the content of the rubber is 18.9 to 20% by weight of the composition, the ratio by weight of the low boiling solvent to the rubber is in the range of 1.56:1 to 1.64:1, the ratio by weight of the pigment to the rubber is in the range of 0.8:1 to 0.9:1, and the ratio by weight of the quality adjuster to the pigment is in the range of 1.7:1 to 1.8:1. Traces of the ink can be erased by a rubber eraser within an initial period of time.

Abstract: This invention provides stencil from which a patternwise perforated stencil can be easily made by handwritting, a stencil material kit with which a patternwise perforated stencil can be made, and a stencil duplicator kit which, in combination with the stencil, performs simple, clear printing. The stencil is made up of a porous support and a masking film formed thereon, said masking film being made of a water-insoluble polymer having tertiary amino groups. The stencil material kit contains the stencil and a patternwise perforated stencil-making solution which forms a water-soluble product upon reaction with said polymer. Stencil printing is performed using the patternwise perforated stencil, a stencil duplicator and printing ink.

Abstract: A pickup device for picking up vibration transmitted through bones or solid members in human, in which a piezoelectric element is mounted like a cantilever within a substantially rigid liquid-tight case filled with a viscous liquid in such a way that the free end of the piezoelectric element can vibrate with respect to the liquid-tight case. The viscosity of the viscous liquid ranges from 30 to 10,000 cs so that the sharpness of resonance of the piezoelectric element can be suitably suppressed.

Abstract: This invention provides stencil from which a patternwise perforated stencil can be easily made by handwriting, a stencil material set with which a patternwise perforated stencil can be made, and a stencil duplicator set which, in combination with the stencil, performs simple, clear printing. The stencil is made up of a porous support and a masking film formed thereon, said masking film being made of a water-insoluble polymer having tertiary amino groups. The stencil material set contains the stencil and a patternwise perforated stencil-making solution which forms a water-soluble product upon reaction with said polymer. Stencil printing is performed using the patternwise perforated stencil, a stencil duplicator and printing ink.

Abstract: Aluminum or an aluminum alloy on the surface of which an anodic oxide film comprising a porous layer and a barrier layer having micropores in the porous layer has been formed by a primary anodic oxidation treatment is subjected to a secondary anodic oxidation treatment and an immersion treatment so as to enlarge the pore diameter of the micropores, to make the cross-sectional profile of the micropores circular, and to make the thickness of the barrier layer and thus, the length of the micropores uniform, and subjecting the so treated aluminum or aluminum alloy to an electrolytic deposition treatment in an electrolytic bath containing a magnetic substance so as to uniformly allow a large amount of the magnetic substance to be deposited in the enlarged, uniform micropores, thereby obtaining a magnetic recording material having improved magnetic intensity and magnetic characteristics.

Abstract: A retractable fountain pen employs a cover plate rotatable about a supporting tube by means of a spring to sealingly contact the tapered front end of a cylindrical head portion to close off a central passageway therein. The tube prevents excess deformation of the resilient tapered front end portion.

Abstract: A pen core for a writing instrument, particularly, for use in a recorder in which writing must be continuously carried out over long periods using a relatively small ink supply. The instrument has an ink conducting core for conducting ink to a writing member, and a barrel with an ink reservoir, the barrel being fitted on the outer wall of the pen core body. An annular groove in the form of a single continuous passageway is formed in the outer wall of the pen core body, the annular groove having a front end connected to an ink sucking groove, which is in turn communicated with the ink conducting core. An air passageway having a front end communicated with an air hole and a rear end communicated with the rear end of the annular groove is formed in the outer wall of the pen core body in such a manner that the air passageway does not cross the annular groove.

Abstract: A capillary nib for pens is shaped from a thermoplastic resin bar and has a cross-sectional shape comprising an outer shell and a plurality of projections joined integrally at their bases to the outer shell at equal angular spacing intervals and projecting centripetally toward the center of the cross section, voids constituting principal capillary ink passages being formed between the projections, alternate projections extending fully to the center and being joined together. The thermoplastic resin bar is formed by extruding the resin in molten state though a die having a large number of orifices disposed in a specific arrangement thereby to form a plurality of filaments of the resin and causing the filaments to adhere longitudinally while the surfaces thereof are still substantially in molten state thereby to form the bar. Each passage or channel has substantially identical transverse width across its cross-sectional area.

Abstract: A magnetic display panel having a transparent or translucent front substrate and a rear substrate bonded thereto by an adhesive with a dispersing liquid confining space formed between the substrates, preferably in the form of multiple cells. The dispersing liquid, composed of a fine particulate thickener, fine magnetic particles, a colorant and a dispersing medium, has a yield value of at least 5 dyne/cm.sup.2. A clear, long-lasting image is recordable by tracing a permanent magnet upon the face of the first substrate.