Abstract: An elastic wave device includes a piezoelectric substrate, a pair of reflectors disposed on the piezoelectric substrate along the propagation direction of an elastic wave, and first to fifth comb electrode pairs disposed in this order between the pair of reflectors. Ground comb electrodes of adjacent comb electrode pairs are connected by an even number of connection electrode fingers or by an odd number of connection electrode fingers.

Abstract: An acoustic wave device is provided with a low-frequency side filter having a low-frequency side passband, a high-frequency side filter having a high-frequency side passband, and first and second balanced terminals. The low-frequency side filter is connected to a first unbalanced terminal. The low-frequency side passband is a frequency band from a first minimum frequency to a first maximum frequency. The high-frequency side filter is connected to a second unbalanced terminal. The high-frequency side passband is a frequency band from a second minimum frequency to a second maximum frequency. The low-frequency side filter includes a first longitudinally-coupled acoustic wave resonator and a first one-terminal pair acoustic wave resonator connected in series to the first longitudinally-coupled acoustic wave resonator. An antiresonant frequency of the first one-terminal pair acoustic wave resonator is set to be higher than the first maximum frequency and lower than the second minimum frequency.

Abstract: An elastic wave device includes a first unbalanced terminal, a second unbalanced terminal, a first balanced terminal, a second balanced terminal, a first filter part, and a second filter part. A phase of an electric signal transmitted from first unbalanced terminal to the first balanced terminal in the first filter part is different from a phase of an electric signal transmitted from the second unbalanced terminal to the first balanced terminal in the second filter part. A phase of an electric signal transmitted from the first unbalanced terminal to the second balanced terminal in the first filter part is different from a phase of an electric signal transmitted from the second unbalanced terminal to the second balanced terminal in the second filter part.

Abstract: An elastic wave device includes an elastic wave resonator which includes a comb-shaped electrode pair including a pair of com-shaped electrodes interdigitating with each other and provided on a piezoelectric substrate and which is configured to trap energy of the elastic wave therein. Each of the pair of comb-shaped electrodes includes interdigital electrode fingers connected to a common. A pitch of the interdigital electrode fingers changes along a direction perpendicular to a propagation direction of elastic wave. The elastic wave device has a small insertion loss and operates efficiently.

Abstract: A toner for electrostatic image developing is disclosed. It is prepared by giving a mechanical impact force to radically polymerized particles containing a colorant and a low molecular weight polyolefine so as to have the low molecular weight polyolefine exist at a ratio of 5 to 40% by number on a surface of the particles. The toner has a uniform and good electrification property, high fixability and no offsetting property.

Abstract: In a method of developing an electrostatic latent image formed on an electrostatic latent image-carrying member with a developer comprising a magnetic carrier and a toner in a non-contact manner under application of an oscillating electric field to a development region, the improvement comprising the surface of said magnetic carrier is covered with an insulating material, and magnetization (M) of said magnetic carrier when measured under application of a magnetic field of 1000 Oersted and weight average diameter (R) of the same expressed in terms of micro meter satisfy the following relation:30.ltoreq.M.ltoreq.-0.8 R+150(wherein 10.ltoreq.R.ltoreq.150).

Abstract: A toner for developing an electrostatic latent image containing a polyester resin binder obtained by condensation polymerization of a diol component and a mixture of acid components. The acid components are an aliphatic unsaturated dicarboxylic acid or an acid anhydride thereof and a polybasic carboxylic acid having not less than three carboxylic acid groups or an acid anhydride thereof. A ratio of the polybasic carboxylic acid having not less than three carboxylic acid groups or the acid anhydride thereof to the total acid components is in the range of from 5 mol % to less than 30 mol %.

Abstract: This invention relates to a toner for development of electrostatic images to be used for development of electrostatic images formed in electrophotography, electrostatic printing, electrostatic recording, etc., and an image forming method by use thereof.

Abstract: A toner for developing an electrostatic image is disclosed, which is not likely cause fogs, toner flying, and solid-black non-uniformity when used for a large number of cpying cycles in a high temperature, high humidity. The toner comprises a polyester resin containing a trivalent or higher monomer as a polymerized component and an antioxidant. As the antioxidant, a compound having a hidered phenolic group is preferably used as the antioxidant.

Abstract: Disclosed is a toner powder for developing latent electrostatic images comprising as a binder for pigment material a block or graft copolymer composed of a crystalline polyester and an amorphous vinyl polymer. The amorphous vinyl polymer has at least two peaks in its molecular weight distribution curve. One is between 100,000 and 1,000,000 and another is between 2000 and 20,000.

Abstract: To overcome the problem of offset images in electrophotography when using a heated roller in fixing a toner image, a toner composition containing a non-linear polyester resin is used. The polyester resin is made from 1-60 mol % polyhydric alcohol having at least three hydroxy groups and 2-65 mol % of a polycarboxylic acid having at least three carboxy groups.

Abstract: Disclosed are a toner for development of electrostatic image, comprising as the main component a resin obtained by allowing a polymer containing a polymer component with low molecular weight and a polymer component with high molecular weight, at least the polymer component with low molecular weight containing a carboxylic acid component, to react with a polyvalent metal compound, and a method of fixing a toner image employing the toner described above.According to the present invention, there can be provided a toner for development of electrostatic image which has more improved fixability without lowering the anti-off-set property already improved, and also which can be prepared with good reproducibility without causing gelation to occur although the metal compound may be formulated therein, and can be improved in fixability without making charging characteristics unstable and at the same time without bringing about lowering in anti-off-set property, and thus an excellent toner image can be fixed.

Abstract: There are disclosed a toner for development of an electrostatic image which comprises containing (a) a mixture of a lower molecular weight polymer component and a higher molecular weight polymer component, and said lower molecular polymer component is a resin obtained by reacting a polymer containing a carboxylic acid component with a polyvalent metal compound to form cross-linking through a metal atom and (b) offset preventive agent; and also an electrostatic latent image developer which comprises (A) toner particles mainly comprising a resin obtained by reacting a carboxy group existing in a polymer component with a polyvalent metal compound and (B) resin coated-carrier particles coated with a fluorine-containing resin on a surface of a magnetic particle or inorganic fine particles.

Abstract: A method of forming a color diffusion transfer image by heat development is disclosed. This method comprises effecting imagewise exposure of a thermally developable photosensitive material containing an organosilver salt and a thermally non-diffusing color providing material capable of releasing a chelatable diffusing dye upon heat development, thermally developing the exposed photosensitive material to form an imagewise pattern of the chelatable dye from said color providing material, and diffusing and transferring at least part of said imagewise pattern into an image-receiving layer containing a polyvalent metallic ion that is superimposed on the photosensitive material, thereby forming on the image-receiving layer an imagewise pattern of the dye that has chelated with the polyvalent metallic ion.

Abstract: An electrophotographic image forming method is disclosed. The method comprises the steps of developing an electrostatic image formed on an image-forming member with a particulate toner for forming a toner image and transferring said toner image onto a receiving material, in which the image-forming member has a surface-improving layer comprised principally of amorphous silicon, and the toner has a weight average particle size within the range of from 1 .mu.m to 6 .mu.m and contains a constituent having a weight average particle size of not more than 5 .mu.m which accounts for not less than 20% by weight of the whole amount of the toner. An electrophotographic copy bearing a high-resolution and high-quality image can be stably obtained by this method.

Abstract: A toner for developing electrostatic latent images which comprises a colorant and two kinds of polyester is disclosed.The fFirst polyester is a nonlinear polyester that is composed of monomers including monomers of trivalence or higher valency and which satisfies the following conditions A1 and A2, the second polyester is a nonlinear polyester that is composed of monomers including monomers of trivalence or higher valency and which satisfies the following conditions B1 and B2, and the difference between the softening points of said first and second polyesters is at least 10.degree. C.condition A1: the monomers of trivalence or higher valency represent from 0.05 mol % to less than 15 mol % of all the monomers present;condition A2: the softening point is in the range of from 120.degree. C. to 160.degree. C.;condition B1: the monomers of trivalence or higher valency represent from 0.05 mol % to less than 15 mol % of all the monomers represent;condition B2: the softening point is in the range of from 80.degree.

Abstract: An electrostatic image developing toner useful for the formation of a toner image by electrophotographic process which employs a heat-fixing method by the use of a heat roller under pressure, wherein said toner comprises as the essential constituents a nonlinear polymer, a low-melting polymer which has a melting point of from 50.degree. to 130.degree. C. and which is incompatible with said nonlinear polymer, a copolymer composed of a segment polymer which is at least compatible with the above nonlinear polymer and a segment polymer which is at least compatible with said low-melting polymer and a coloring agent.

Abstract: A photoreceptor comprising a photosensitive layer and an electroconductive support, wherein the photosensitive layer contains an azo compound represented by the following Formula [I]: ##STR1## wherein A is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, B is an oxygen atom or a sulfur atom; R is a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom; and Cp is ##STR2## wherein Z represents a group of atoms necessary for constituting a substituted or unsubstituted aromatic carbon ring, or a substituted or unsubstituted aromatic heterocyclic ring; Y is a substituted or unsubstituted carbamoyl group or a substituted or unsubstituted sulfamoyl group;R.sub.1 is a hydrogen atom, a substituted or unsubstituted amino group, a substituted or unsubstituted carbamoyl group, a carboxy group and the esters thereof, or cyano group; A' is a substituted or unsubstituted aryl group;R.sub.2 and R.sub.

Abstract: Photographic element used in color diffusion transfer processes comprising an image receiving layer containing a polymer having monomer units represented by either Formula I or Formula II ##STR1## wherein A is a copolymerizable monomer unit having at least two ethylenically unsaturated groups; B and B' are copolymerizable .alpha.,.beta.-ethylenically unsaturated monomer units; each R.sub.1 is independently hydrogen or methyl; R.sub.2 and R.sub.3 are independently hydrogen, alkyl, or aryl; R.sub.4, R.sub.5 and R.sub.6 are independently alkyl groups; L.sub.1 and L.sub.2 are independently divalent combining groups; X is a monovalent anion; x, y, z, p, q, r, and s, are each copolymerization mole percentages as follows: 0.5.ltoreq.x.ltoreq.6, 0.ltoreq.y.ltoreq.79.5, 20.ltoreq.z.ltoreq.99.5, 0.ltoreq.p.ltoreq.6, 0.ltoreq.q.ltoreq.80, 10.ltoreq.r.ltoreq.90, and 10.ltoreq.s.ltoreq.90.

Abstract: A photographic light-sensitive element having at least one light-sensitive silver halide layer and a dye image forming non-diffusible material which, upon a redox reaction under alkaline conditions releases a diffusible cyan dye or precursor thereof wherein said material is ##STR1## wherein Car represents a carrier component having at least on Ball group as a part thereof which alone or together with other such groups in said Car renders said compound non-diffusible during development in alkaline processing solution, said Car being capable of releasing from said compound a diffusible dye or the precursor thereof as the result of a redox reaction under alkaline conditions:R represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms;R.sup.1 is ##STR2## wherein R.sup.2 and R.sup.3 are independently selected from a hydrogen atom, or an alkyl, a cycloalkyl or an aryl group having from 1 to 30 carbon atoms, and R.sup.2 and R.sup.