摘要:
An ultrasonic transducer includes a piezoelectric member consisting of either a unpolarized piezoelectric polymer material or the like, or an in-advance polarized piezoelectric polymer material or the like, a first flexible substrate on which a first electrode set and their connecting leads are formed, these being bonded to one surface of the piezoelectric member, and a second flexible substrate on which a second electrode and its connecting lead are formed, these being bonded to the other surface of the piezoelectric member, wherein the piezoelectric member is sandwiched between the first electrode set and second electrode. The electrodes can apply a voltage to polarize the unpolarized piezoelectric polymer material in a manufacturing process of the piezoelectric member, or apply a drive voltage to the finished ultrasonic transducer. Also disclosed is a method of manufacturing the ultrasonic transducer.
摘要:
In a method and apparatus for ultrasonic measurement, an ultrasonic pulse is transmitted into a object and received as an echo signal following reflection within the object, and the acoustic characteristic of the object is measured based on object position and frequency information contained in the echo signal. The measured acoustic characteristic is representative of information relating to degree of attenuation and frequency dependence thereof inside the object and obtained from the position and frequency information contained in the echo signal. The apparatus according to this invention displays an image of the distribution of the object acoustic characteristic obtained from the measured acoustic characteristic.
摘要:
The acoustic characteristics, particularly the attenuation coefficient, internally of a object undergoing examination are measured on the basis of ultrasonic echo pulse, and diminishing the influence of the sound field. Standard media having attenuation coefficients that differ from one another are measured in advance by a predetermined method to find the attenuation rates and attenuation coefficients thereof. The attenuation coefficient of the object is taken to be the attenuation coefficient of one of the standard media that minimizes a difference between the attenuation rate of each standard media and the attenuation rate of the object, which is measured based on an ultrasonic echo signal from within the object.
摘要:
An aqueous ink for ink-jet printing comprising at least a water-soluble dye, a water-soluble organic solvent, a water-soluble preservative and anti-mold agent, and water, wherein(1) the water-soluble dye is a mixture of dye compounds I and II and/or III, the peak ratio of I/II and/or III of the water-soluble dye measured by liquid chromatography is in the range of 0.9 to 3.0; the total concentration of NaCl and Na.sub.2 SO.sub.4 contained in the water-soluble dye is 3.0 wt. % or less; and the concentration of Ca contained therein is 120 ppm or less;(2) the water-soluble organic solvent is a mixture consisting essentially of glycerin and at least one glycol selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and polyethylene glycol, with the content ratio of (the glycerin:the glycol) being in the range of (1:1) to (1:5) in terms of parts by weight, and the concentration of the water-soluble organic solvent in the aqueous ink is in the range of 10 wt. % to 30 wt. %; and(3) the surface tension of said aqueous ink is 50 dynes/cm or more.
摘要:
An ink jet recording process comprising jetting aqueous ink through a narrow nozzle, recovering the unused aqueous ink that has not reached the surface of an object to be recorded within an ink jet printer and then circulating it for re-use, characterized in that said aqueous ink is brought into contact with an ion-exchange resin in at least one location in the ink circulating system within said printer.
摘要:
An unsaturated polyester resin composition for coating metal substrates, comprising an unsaturated alkyd component and a polymerizable vinyl monomer, said unsaturated alkyd component selected from the group consisting of:(a) compounds resulting from addition of mono-epoxy compounds possessing a .beta.,.gamma.-unsaturated ether to the carboxyl group of dicyclopentadiene-modified unsaturated alkyds, and(b) mixtures of dicyclopentadiene-modified unsaturated alkyds with unsaturated alkyds obtained by the ring-opening copolymerization of .alpha.,.beta.-unsaturated dicarboxylic anhydrides and mono-epoxy compounds possessing a .beta., .gamma.-unsaturated ether group.
摘要:
A pressure sensitive adhesive toner for use in electrostatic photography which consists essentially of porous aggregates. Each aggregate consists essentially of a cluster of a multiplicity of individual granules of pressure sensitive adhesive substance, each granule being encapsulated by a coating film of a film-forming material. Particles of an inorganic or organic pigment and/or a magnetic substance are contained within the aggregate in the interstices between the granules and deposited on the surfaces of the encapsulated granules. The toner aggregates are free from a tendency to cohere, cake and agglomerate to each other. The toner can be readily pressure fixed, using a low impression pressure, onto a surface bearing an electrostatic latent image without causing any contamination thereon, thereby forming a distinct visible image.
摘要:
The recording apparatus of a type adopting a non-impact recording method comprises a recording electrode and a toner-bearing counter electrode, which are disposed with a predetermined gap therebetween, and recording is performed on a recording sheet, while the sheet is passed through the gap or recording portion, by the toner being attracted from the counter electrode to the recording sheet in accordance with a signal applied to the counter electrode from the recording electrode. On the surface of the counter electrode, in accordance with the invention there are formed an electrically conductive and ferromagnetic base portion and a number of non-conductive and non-magnetic convexities. The toner is deposited only on the base portion by suitable supply and scraper means, without exceeding the height of the convexities. Furthermore, a quenching charger for quenching charges held on the convexities is disclosed and the magnetic poles of each magnet disposed inside the counter electrode are directed so as to avoid the recording portion.
摘要:
Provided is a web floating and conveying device which has excellent web quality maintaining property and excellent conveying-fluid precision control property in conveying a web film. A conveyance guide (1) of the web floating and conveying device (10) is formed of a lamination-type assembled body having the split structure which is constituted of plate-shaped members (2) which are approximately radially arranged from an axis of the conveyance guide (1). A fluid passing passage which forms a fluid discharge hole by connecting a web floating surface (1a) and an introduction flow passage (7) through which a pressurized fluid is supplied to each other is formed on either one or both lamination surfaces of the plate-shaped members (2) which are laminated adjacent to each other.
摘要:
A process for producing a multilayered unstretched film. The process is intended to minimize the amount of those thick parts of a film formed which are to be discarded, and to thereby attain a cost reduction. Thermoplastic resins (20A) and an extra thermoplastic resin (20B) different from the thermoplastic resins (20A) are separately melted by heating. Immediately before widening in respective manifolds, the extra thermoplastic resin is introduced to each edge part of each of the objective thermoplastic resins. The resins are fed to and widened in the manifolds so that the extra thermoplastic resin is disposed on the side of each edge of each objective thermoplastic resin. Subsequently, the melts are joined and ejected from the die lip of the T-die on a casting roll. Thus, a multilayered unstretched film is formed which comprises multilayered thermoplastic resins made of the objective thermoplastic resins and the multilayered extra thermoplastic resin disposed on the side of each edge of those multilayered resins. Thereafter, the parts constituted of the extra thermoplastic resin are removed by cutting to form a multilayered unstretched film (20) consisting mainly of the objective thermoplastic resins.