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1
US20050202333A1
Publication/Patent Number: US20050202333A1
Publication date: 2005-09-15
Application number: 10/800,568
Filing date: 2004-03-15
Inventor: Tomoyori, Kageyuki  
Abstract: Disclosed is an image forming method comprising: developing a latent image formed on a cylindrical electrophotographic photoreceptor having a cylindricity of 5 to 40 μm, with a developer comprising a toner sufficing at least one of conditions (1) to (5): (1) A toner includes toner particles having a variation coefficient of shape coefficient of not more than 16 percent. (2) A toner includes at least 65 percent of toner particles having a shape coefficient in the range of 1.2 to 1.6. (3) A toner includes at least 50% of toner particles in number having no corner. (4) A toner includes toner particles having a number variation coefficient in the number particle size distribution of not more than 27 percent. (5) A toner has M of at least 70 percent, M being sum of m1 and m2 wherein m1 is relative frequency of toner particles, included in the most frequent class, and m2 is relative frequency of toner particles included in the second frequent class in a histogram showing the particle size distribution, which is drawn in such a manner that natural logarithm lnD is used as an abscissa, wherein D (in μm) represents the particle diameter of a toner particle, while being divided into a plurality of classes at intervals of 0.23, and number of particles is used as an ordinate. Disclosed is an image forming method comprising: developing a latent image formed on a cylindrical electrophotographic photoreceptor having a cylindricity of 5 to 40 μm, with a developer comprising a toner sufficing at least one of conditions (1) to (5): (1) A toner ...more ...less
2
US20050288484A1
Publication/Patent Number: US20050288484A1
Publication date: 2005-12-29
Application number: 11/087,496
Filing date: 2005-03-24
Abstract: The present invention relates to processes utilizing ionic liquids for the dissolution of various polymers and/or copolymers, the formation of resins and blends, and the reconstitution of polymer and/or copolymer solutions, and the dissolution and blending of “functional additives” and/or various polymers and/or copolymers to form advanced composite materials. The present invention relates to processes utilizing ionic liquids for the dissolution of various polymers and/or copolymers, the formation of resins and blends, and the reconstitution of polymer and/or copolymer solutions, and the dissolution and blending of “functional ...more ...less
3
US20050056170A1
Publication/Patent Number: US20050056170A1
Publication date: 2005-03-17
Application number: 10/926,046
Filing date: 2004-08-26
Abstract: An emulsification apparatus is used in a production apparatus of microcapsules. The emulsification apparatus is constituted with an outer cylinder and an inner cylinder coaxially arranged in a superposed manner, the outer cylinder is fixed, and the inner cylinder is rotated at a circumferential speed ω. A liquid being processed is fed into the gap between the outer cylinder and the inner cylinder, thus a shear force is exerted to the liquid being processed, and the liquid being processed is thereby emulsified. The relation between the magnitude d (mm) of the gap, the viscosity η (mPa·sec) of the liquid being processed and the circumferential speed ω (m/sec) of the inner cylinder is such that the circumferential speed co is controlled so that any one of the following relations may be satisfied: (1) When η≦20, d≦5/ω; (2) When 20<η≦50, d≦10/ω; (3) When 50<η≦100, d≦20/ω; (4) When 100<η. An emulsification apparatus is used in a production apparatus of microcapsules. The emulsification apparatus is constituted with an outer cylinder and an inner cylinder coaxially arranged in a superposed manner, the outer cylinder is fixed, and the inner cylinder is rotated at a ...more ...less
4
US20050113505A1
Publication/Patent Number: US20050113505A1
Publication date: 2005-05-26
Application number: 10/992,816
Filing date: 2004-11-22
Abstract: Disclosed are hollow polymer particles composed of a crosslinked polymer having a comparatively small particle diameter and a narrow particle diameter distribution, an aqueous dispersion of the particles, and an ink having good flying property. The hollow polymer particles are obtained by emulsion-polymerizing a crosslinkable polymerizable monomer composition absorbed in seed particles and containing a crosslinkable monomer component and a hydrophilic monomer component, wherein the seed particles are particles of a polymer having a weight average molecular weight of 500 to 15,000, and obtained by emulsion-polymerizing 100 parts by mass of a non-crosslinkable polymerizable monomer in the presence of 0.01 to 5 parts by mass of a chain transfer agent composed of at least one compound selected from the group consisting of α-methylstyrene dimer, thiuram disulfides and terpene hydrocarbons. The ink contains the hollow polymer particles. Disclosed are hollow polymer particles composed of a crosslinked polymer having a comparatively small particle diameter and a narrow particle diameter distribution, an aqueous dispersion of the particles, and an ink having good flying property. The hollow polymer particles are ...more ...less
5
US20050085581A1
Publication/Patent Number: US20050085581A1
Publication date: 2005-04-21
Application number: 10/961,294
Filing date: 2004-10-08
Abstract: The present invention relates to substantially free-flowing polymer particles. The polymer particles are those which have a one millimeter penetration temperature of less than about 75° C. as determined by thermal mechanical analysis or an unconfined yield strength of greater than about 15 pounds per square foot (73 kilograms per square meter). The composition also comprises an effective amount of an anti-blocking agent in the presence or absence of a binding agent. The present invention relates to substantially free-flowing polymer particles. The polymer particles are those which have a one millimeter penetration temperature of less than about 75° C. as determined by thermal mechanical analysis or an unconfined yield strength of ...more ...less
6
US20050244732A1
Publication/Patent Number: US20050244732A1
Publication date: 2005-11-03
Application number: 10/836,667
Filing date: 2004-04-30
Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula  where R1 and R2 are, each independently, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; R3 and R4 are, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; X1 and X2 are, each independently, a linking group; Y1 and Y2, each independently, comprise an arylamine group; and Z is a bridging group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described. Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ...more ...less
7
US20050266333A1
Publication/Patent Number: US20050266333A1
Publication date: 2005-12-01
Application number: 11/068,832
Filing date: 2005-03-02
Abstract: A pulverized starting material is supplied quantitatively from a quantitative feeder 1 to a first mechanical pulverizer 2 where the material is pulverized moderately, the resulting moderately pulverized material is supplied quantitatively from a quantitative feeder 3 to a second mechanical pulverizer 4 where the material is finely pulverized, and the resulting finely pulverized material is introduced into a coarse-powder classifier 5 to classify coarse powder not smaller than a predetermined particle diameter. The finely pulverized material from which the coarse powder was removed by classification is further classified fine powder not larger than a predetermined size by a fine-powder classifier 7 to produce a classified product, while the separated classified coarse powder is introduced into a returning-powder feeder 6. The classified coarse powder introduced into the returning-powder feeder 6 is again supplied quantitatively to the second mechanical pulverizer 4, upon which when it is detected that the weight of the coarse powder stored in the returning-powder feeder 6 is deviated from a predetermined range, the amount of the returning powder supplied to the second mechanical pulverizer 4 is changed and regulated such that the powder is supplied in the above changed amount. The pulverization conditions in the first and second mechanical pulverizers are established such that the volume-average particle diameter D1 (μm) of the moderately pulverized material obtained by the first mechanical pulverizer 2 and the volume-average particle diameter D2 (μm) of the finely pulverized material obtained by the second mechanical pulverizer satisfy: 3 μm≦D1−D2≦6 μm. A pulverized starting material is supplied quantitatively from a quantitative feeder 1 to a first mechanical pulverizer 2 where the material is pulverized moderately, the resulting moderately pulverized material is supplied quantitatively from a quantitative feeder 3 to a second ...more ...less
8
US20050227162A1
Publication/Patent Number: US20050227162A1
Publication date: 2005-10-13
Application number: 11/124,323
Filing date: 2005-05-06
Abstract: The present invention pertains to a kit of parts for the preparation of a solvent based coating composition, said kit of parts comprising A) at least one toner base comprising an acrylic polyol, a cellulose resin, a polyester polyol, and a pigment, B) at least one connector base comprising at least one resin compatible with the resins mentioned in toner base A), and C) at least one reducer base free of resins and pigments. The coating compositions prepared from the kit of parts of the present invention provide a very flexible application window. Due to a selection of resins, additives, and/or fillers to be used in the connector base (B), the use and properties of the coating composition can be modified. The present invention pertains to a kit of parts for the preparation of a solvent based coating composition, said kit of parts comprising A) at least one toner base comprising an acrylic polyol, a cellulose resin, a polyester polyol, and a pigment, B) at least one connector base ...more ...less
9
US20050152832A1
Publication/Patent Number: US20050152832A1
Publication date: 2005-07-14
Application number: 11/005,973
Filing date: 2004-12-07
Abstract: The present invention relates to a method of producing particles having a particle size of less than 100 nm and surface areas of at least 20 m2/g where the particles are free from agglomeration. The method involves synthesizing the particles within an emulsion having a 1-40% water content to form reverse micelles. In particular, the particles formed are metal oxide particles. The particles can be used to oxidize hydrocarbons, particularly methane. The present invention relates to a method of producing particles having a particle size of less than 100 nm and surface areas of at least 20 m2/g where the particles are free from agglomeration. The method involves synthesizing the particles within an emulsion having a 1-40% ...more ...less
10
US20050244733A1
Publication/Patent Number: US20050244733A1
Publication date: 2005-11-03
Application number: 10/836,734
Filing date: 2004-04-30
Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula  where R1 and R2 are, each independently, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; R3 and R4 are, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; X1 and X2 are, each independently, a linking group; Y1 and Y2, each independently, comprise an arylamino group; and Z is a bridging group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described. Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ...more ...less
11
US20050244734A1
Publication/Patent Number: US20050244734A1
Publication date: 2005-11-03
Application number: 10/834,656
Filing date: 2004-04-29
Abstract: An improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where X and X′ are, each independently, a linking group; Ar comprises an aromatic group; R1, R2, and R3 comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; and E1 and E2 are, each independently, a reactive ring group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses, imaging methods, and a polymeric charge transport material prepared from the charge transport material above are described. An improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where X and X′ ...more ...less
12
US20050233229A1
Publication/Patent Number: US20050233229A1
Publication date: 2005-10-20
Application number: 10/824,794
Filing date: 2004-04-14
Abstract: An electrostatographic imaging member having a flexible supporting substrate, an imaging layer capable of retaining an electrostatic latent image, and an electrically conductive ground strip layer comprising a film forming binder and a lignin sulfonic acid doped polyaniline dispersion, and an image forming apparatus with the above imaging member to receive an electrostatic latent image on a charge-retentive surface of the imaging member; a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed toner image on the charge-retentive surface; a transfer component to transfer the developed toner image from the charge-retentive surface to a receiving copy substrate; and a fixing component to fuse the developed image to the receiving copy substrate. An electrostatographic imaging member having a flexible supporting substrate, an imaging layer capable of retaining an electrostatic latent image, and an electrically conductive ground strip layer comprising a film forming binder and a lignin sulfonic acid doped polyaniline ...more ...less
13
US20040202948A1
Publication/Patent Number: US20040202948A1
Publication date: 2004-10-14
Application number: 10/836,901
Filing date: 2004-04-30
Abstract: The present invention relates to an imaging member comprising poultry gelatin. In one embodiment, the poultry gelatin is located preferably in at least one layer in the upper half of said imaging member comprising poultry gelatin. Another embodiment provides an aqueous coating composition comprising poultry gelatin. The present invention relates to an imaging member comprising poultry gelatin. In one embodiment, the poultry gelatin is located preferably in at least one layer in the upper half of said imaging member comprising poultry gelatin. Another embodiment provides an aqueous coating ...more ...less
14
US20040142580A1
Publication/Patent Number: US20040142580A1
Publication date: 2004-07-22
Application number: 10/752,556
Filing date: 2004-01-08
Abstract: A silylation treatment unit includes a chamber, a heating mechanism provided in this chamber for heating a substrate, a supplying mechanism for supplying a vapor including a silylation reagent into the chamber. The unit also has a substrate holder for holding the substrate in the chamber, in which an interval between the heating mechanism and the substrate is adjustable to at least three levels or more. The substrate is received such that it is least influenced by a heat in the chamber by maximizing the interval from the heating mechanism. The interval is brought comparatively closer to the heating mechanism to wait until the temperature inside the chamber obtains a high planer uniformity. The interval is brought further closer to the heating mechanism after a high planer uniformity is obtained such that a silylation reaction occurs. A silylation treatment unit includes a chamber, a heating mechanism provided in this chamber for heating a substrate, a supplying mechanism for supplying a vapor including a silylation reagent into the chamber. The unit also has a substrate holder for holding the substrate in ...more ...less
15
US20040161691A1
Publication/Patent Number: US20040161691A1
Publication date: 2004-08-19
Application number: 10/775,078
Filing date: 2004-02-11
Abstract: In a process for producing an electrophotographic photosensitive member having a support and a photosensitive layer provided thereon, the process comprises a coating step of coating the surface of the support with a coating fluid to form a wet coating; a drying step of drying the wet coating formed by the coating step, to form a dried coating film; a cutting step of making a cut in the dried coating film formed by the drying step, in its peripheral direction at a preset position; and a removal step of removing, by jetting a gas, the dried coating film on its end side extending from the cut made by the cutting step. Also disclosed are an electrophotographic photosensitive member produced by this production process, and a electrophotographic photosensitive member and an electrophotographic apparatus which have the electrophotographic photosensitive member. In a process for producing an electrophotographic photosensitive member having a support and a photosensitive layer provided thereon, the process comprises a coating step of coating the surface of the support with a coating fluid to form a wet coating; a drying step of drying ...more ...less
16
US20040185357A1
Publication/Patent Number: US20040185357A1
Publication date: 2004-09-23
Application number: 10/249,102
Filing date: 2003-03-17
Abstract: An image forming device is disclosed which comprises an electrophotographic photoreceptor and a flash fixing means. The photoreceptor has a photoconductive layer formed on top of a support substrate, and the photoconductive layer contains a charge generating agent and a charge transport agent therein. The half maximum wavelength region of the charge transport agent&apos;s absorption peak is in a visual region that includes the wavelength region of the flash light when its intensity is 50% or greater of its maximum but does not include the wavelength region of the exposure light. This photoreceptor will not produce electrostatic irregularities even if light from the flash fixing means leaks thereon, and its sensitivity and its ability to be electrostatically charged will not decrease even if repeatedly used. An image forming device is disclosed which comprises an electrophotographic photoreceptor and a flash fixing means. The photoreceptor has a photoconductive layer formed on top of a support substrate, and the photoconductive layer contains a charge generating agent and a charge ...more ...less
17
US20040106055A1
Publication/Patent Number: US20040106055A1
Publication date: 2004-06-03
Application number: 10/655,289
Filing date: 2003-09-04
Abstract: In a process for forming an amorphous pigment mixture consisting essentially of TiOPc and TiOFPc and containing more than about 75 weight percent of TiOPc, a mixture of crude crystalline TiOPc and TiOFPc pigments in a weight ratio of at least 75:25 TiOPc:TiOFPc is combined with at least about 5 wt. %, based on the total weight of TiOPc and TiOFPc, of an organic milling aid. The mixture is treated under conditions effective to form a substantially amorphous pigment mixture of TiOPc and TiOFPc. The organic milling aid can be separated from the substantially amorphous pigment mixture, which can be converted to a nanoparticulate cocrystalline TiOPc/TiOFPc composition. In a process for forming an amorphous pigment mixture consisting essentially of TiOPc and TiOFPc and containing more than about 75 weight percent of TiOPc, a mixture of crude crystalline TiOPc and TiOFPc pigments in a weight ratio of at least 75:25 TiOPc:TiOFPc is combined with ...more ...less
18
US20040126686A1
Publication/Patent Number: US20040126686A1
Publication date: 2004-07-01
Application number: 10/665,155
Filing date: 2003-09-22
Abstract: An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and a charge transport layer in this order, a charger; an irradiator; an image developer; and a transferer applying an electric current not less than 65 &mgr;A to the electrophotographic photoreceptor, wherein the charge generation layer comprises titanylphthalocyanine crystals having a CuK&agr; 1.542 &angst; X-ray diffraction spectrum having plural diffraction peaks, wherein a maximum diffraction peak is observed at a Bragg (2 &thgr;) angle of 27.2°; main peaks are observed at 9.4°, 9.6° and 24.0°; and a minimum diffraction peak is observed at 7.3°; and no diffraction peak is observed at an angle greater than 7.3° and less than 9.4°, wherein said angles may vary by ±0.2° and the minimum interval where no peak is observed between required peaks at 7.3 and 9.4 is 2.0 degrees absolute or more. An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and a charge transport layer in this order, a charger; an irradiator; an image developer; and a ...more ...less
19
US20040253531A1
Publication/Patent Number: US20040253531A1
Publication date: 2004-12-16
Application number: 10/736,556
Filing date: 2003-12-17
Abstract: The present invention relates to a method for manufacturing a toner with adjusted particle size distribution having a step of preparing colored particles that contain a binder resin and a colorant, and a step of classifying the colored particles. In the classification step, a classifier that has a plurality of vane-wheel classifying rotors coaxially in a casing, enables the rotating speed of each classifying rotor to be set to be the same as or different from each other, and can simultaneously perform a plurality of stages of classification corresponding to each classifying rotor is used; and the powder material comprising colored particles to which a fluidizing agent is added is fed to the classifier to perform classification. The present invention relates to a method for manufacturing a toner with adjusted particle size distribution having a step of preparing colored particles that contain a binder resin and a colorant, and a step of classifying the colored particles. In the classification step, a ...more ...less
20
US20040115543A1
Publication/Patent Number: US20040115543A1
Publication date: 2004-06-17
Application number: 10/320,827
Filing date: 2002-12-16
Abstract: A flexible electrophotographic imaging member comprising a supporting substrate, at least one imaging layer on one side of the supporting substrate, a charge blocking layer, an optional adhesive layer, a charge-generating layer, a charge transporting layer, a seam overcoat layer comprising a coating solution of a co-polyester resin and having a thickness of from about 2 to about 4 micrometers and having a width of from about 2 to about 10 millimeters and wherein said co-polyester resin is present in an amount of from about 2 to about 40 percent by weight based on the total weight of said overcoat layer, and a binder. The imaging member exhibits an excellent life cycle; excellent wear resistance, excellent electrical performance, and outstanding print quality. A flexible electrophotographic imaging member comprising a supporting substrate, at least one imaging layer on one side of the supporting substrate, a charge blocking layer, an optional adhesive layer, a charge-generating layer, a charge transporting layer, a seam overcoat layer ...more ...less