Abstract: After making such adjustment that an MPP offset can be made zero when main beam is positioned at the center of main photoreceptor, using electric signals E and F photo-electrically converted by one of two-divided side beam photoreceptors and electric signals H and G photo-electrically converted by the other thereof, a side push-pull signal SPP including a constant &agr; determined for allowing respective (F−&agr;E) and (&agr;H−G) offsets to be made zero is calculated according to a formula, SPP=(F−&agr;E)+(&agr;H−G). From this SPP signal and the main push-pull signal MPP, a differential push-pull signal DPP is then calculated, thereby allows the tracking control to be carried out. Thus, stable tracking control can be obtained even during recording.

Abstract: A method of tracking servo for an optical pickup device comprises the steps of generating each individual push pull signal (an SPP1 signal, an SPP2 signal and an MPP signal) with a photo detector composed of a main photo detector having four photo-detecting sections crosswise and two side photo detectors having respectively two photo-detecting sections left and right, and generating a tracking error signal (a DPP signal) on the basis of operational output from the push pull signals resulting from respectively canceling the amounts of DC offset produced in each of the push pull.

Abstract: A coating composition curable by actinic radiation, heat or both comprising a polymer containing an alkoxysilyl group having a weight average molecular weight of from about 500 to more than 10,000, a Radical reactive compound, a cationic polymerization initiator, and an optional radical polymerization initiator and cationic reactive compound.

Abstract: An infrared imaging device includes a board which is movable inside the infrared imaging device, plural kinds of magnification lenses, and plural kinds of infrared light radiation parts which radiate infrared lights having respective radiation temperatures, wherein the lenses and the infrared light radiation parts are situated on the board.

Abstract: An infrared imaging device includes a board which is movable inside the infrared imaging device, plural kinds of magnification lenses, and plural kinds of infrared light radiation parts which radiate infrared lights having respective radiation temperatures, wherein the lenses and the infrared light radiation parts are situated on the board.

Abstract: According to the present invention, a semiconductor laser drive device is provided with a high-frequency superimposing circuit to superimpose a high-frequency current on a laser diode and a superimposed frequency changing circuit to change the superimposed frequency and the amplitude of high-frequency current responsive to an operation mode of an optical disk device, wherein the respective superimposed frequency and the amplitude between at least a first output power and a second output power from the semiconductor laser are changed in response to the operation mode of the optical disk device. This not only enables the high-frequency superimposition of a plurality of frequencies and the mode optimization but also facilitates the reduction of laser noises.

Abstract: A coating composition curable by actinic radiation, heat or both comprising a polymer containing an alkoxysilyl group having a weight average molecular weight of from about 500 to more than 10,000, a Radical reactivity compound, a cationic polymerization initiator, and an optional radical polymerization initiator and cationic reactivity compound.

Abstract: A method of tracking servo for an optical pickup device comprises the steps of generating each individual push pull signal (an SPP1 signal, an SPP2 signal and an MPP signal) with a photo detector composed of a main photo detector having four photo-detecting sections crosswise and two side photo detectors having respectively two photo-detecting sections left and right, and generating a tracking error signal (a DPP signal) on the basis of operational output from the push pull signals resulting from respectively canceling the amounts of DC offset produced in each of the push pull.

Abstract: A pollution-preventing process which comprises (i) controlling a surface moisture content of a first building material selected from the group consisting of an inorganic base material and wood at 0 to 20%, or (ii) coating a penetration-inhibiting primer onto a surface of a second building material having a surface moisture content of 10 to 100% and selected from the group consisting of an inorganic base material and wood to be dried, followed by coating a treating agent consisting of an organic solvent solution of a modified polysiloxane resin having a ladder structure onto a surface of the first building material or the second building material to impregnate the surface with the treating agent and by subjecting to curing treatment to prevent at least one pollutant selected from the group consisting of mold and moss from growing on the surface of the first building material or the second building material.

Abstract: A method for reading of information, which comprises printing information on a metal substrate or a substrate capable of transmitting infrared rays of 2-10 .mu.m wavelength, with a marking ink containing tin oxide, indium-tin mixed oxide or a mixture of tin oxide or indium-tin mixed oxide and at least one compound selected from the group consisting of alumina, barium sulfate, silicon dioxide and calcium carbonate, as necessary coating a clear coating or a coloring ink on at least the information-printed area of the substrate, and identifying the information by the use of a CCD camera sensitive to infrared rays of 2-10 .mu.m wavelength or an infrared detector. No noise is generated even when the reflectance of a light from the substrate surface is large, and the information can be identified (read) easily.

Abstract: An actinic radiation-curable colored coating composition for use in vacuum forming film, containing, as the essential components, (A) a resin containing at least 0.1 of polymerizable unsaturated group per 1,000 of molecular weight and having a weight-average molecular weight of 2,000 to 300,000, (B) a coloring material and (C) an organic solvent, a colored coating layer obtained by coating or printing the colored coating composition, followed by removing the organic solvent therefrom prior to curing and comprising the components (A) and (B) being tack-free and heat-softening; a vacuum forming film therefrom; and a vacuum-formed product obtained therefrom.

Abstract: Information is printed on the surface of a substrate with a marking ink containing a mixture of an indium-tin mixed oxide and at least one compound selected from the group consisting of alumina, barium sulfate, silicon dioxide and calcium carbonate, to prepare an invisible marking-printed material; and infrared rays of 2-10 .mu.m wavelength are applied onto the invisible marking-printed material to measure the infrared absorptivities of the invisible marking area and other area of said material and identify the information signified by the invisible marking.

Abstract: An electron radiation curing type adhesive which is excellent for adhesion between a polyester film and a metal material, and which is excellent in retort resistance or the like where the adhesive is used for food cans. There is also disclosed a metal plate laminated with a polyester film. The electron radiation curing type adhesive is composed of a resin composition in which 2 to 200 weight part of polyester group oligomer having unsaturated double-bonds, with respect to 100 weight parts of polyester resin, has added thereto 0.5 to 250 PHR of a stress relaxation agent. The polyester film and a metal plate are laminated with each other by means of the above-mentioned adhesive, and then the film and the metal plate are bonded together by heating and curing the adhesive by irradiation using electron radiation.

Abstract: A process for preparing a printed circuit board. The process involves successive steps of coating a photosensitive electrodeposition coating composition onto a printed-circuit copper-clad, laminated base plate to form a photosensitive resist film, applying a pattern mask onto the photosensitive resist film, exposing to an active light, developing and etching. Also the printed-circuit copper-clad, laminated base plate is subjected to a corrosion preventing treatment after cladding or laminating and prior to the step of coating the electrodeposition coating composition thereonto with a nitrogen-containing heterocyclic compound as a corrosion inhibitor.

Abstract: Disclosed is an improved process for preparing a printed-circuit board, which comprises successive steps of electrodeposition coating of a photosensitive resin on a printed-circuit base plate to form a photosensitive resist film, exposure to light through a pattern mask, development and etching, the improvement further comprising a step of dipping the photosensitive resist film formed by electrodeposition coating into an aqueous solution comprising water as a major component and applying a voltage to carry out electroendosmosis, whereby the tendency of the photosensitive resist film to stick to the pattern mask is reduced.

Abstract: A flat frequency, constant voltage power source device is provided for parallel operation of a plurality of electric generators. The generators include exciting windings of induction motors integral with the generators for connecting and disconnecting outputs of the generators. A starting sequence of the electric generators is based on a start signal provided externally and start preparation completion signals indicating completion of start preparation routines. The induction motors of the generators are thereby varied in frequency so that the generators can be synchronized in phase for their effective parallel operation.

Abstract: Disclosed is an improved process for preparing the printed circuit board, which comprises coating a photo-curable electrodeposition coating composition on the surface of the copper foil of a copper-clad, laminated plate to form a photo-sensitive resist film thereon, lapping a photographic negative or positive film onto the photo-sensitive resist film, and exposing to an active light, followed by development, the improvement comprising incorporating a colorless or substantially colorless reduction-type leico pigment into the electrodeposition coating composition to form a photo-sensitive resist film containing the leico pigment, and to develop a color in an exposed area of the photo-sensitive resist film by exposing to the active light.

Abstract: A textured proteinaceous food having a unique texture which is obtained in such a manner that a domestic animal meat or a marine animal meat or a minced meat of such animal is heated so as to gel to such an extent that the meat material does not lose its binding capacity, and the proteinaceous material in this gel state is force-extruded under pressure from a die having a predetermined configuration and a predetermined number of orifices. It is possible to obtain products having various kinds of cross-sectional pattern such as a honeycomb pattern and a rose-like pattern by employing appropriate dies.

Abstract: An assembly machine including a drive unit and an assembling unit removably coupled to the drive unit so as to be driven by the drive unit to assemble an assembly such as a torque converter case with an assembly part such as a valve body unit. The machine further includes an assembly part conveyance means for supply the assembly part, an assembling unit housing means for housing a plurality of assembling units, and a changeover conveyance means. The assembly part is conveyed from the assembly part conveyance means to the assembling unit by the changeover conveyance means.

Abstract: A method of forming a printed circuit by use of a specified photo-curable coating composition. The photo-curable coating composition is a photo-curable or ionizing radiation-curable powder coating composition containing a thermoplastic resin in a solid state at normal temperature, and having 0.5 to 5 of a polymerizable unsaturated group per 1000 of number average molecular weight, as a film-forming component.