Patents by Inventor Satoshi Nishigaki
Satoshi Nishigaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7285158Abstract: An image forming method, device and a recording agent for forming an image through subtractive color mixing by using ink of plural color components different in hue. The ink is created by mixing a first coloring agent expressing one of the color components and a second coloring agent identical in hue to the first coloring agent. The ink has a higher spectral reflectance than a spectral reflectance of the first coloring agent.Type: GrantFiled: March 25, 2004Date of Patent: October 23, 2007Assignee: Sharp Kabushiki KaishaInventors: Takuya Iwanami, Haruo Yamamoto, Satoshi Nishigaki, Tohru Sakuwa
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Publication number: 20060046062Abstract: It is an object of the present invention to provide a method of producing a functional film, capable of simply producing a functional film which has excellent uniformity of film quality, film configuration and film thickness throughout a surface of a substrate and particularly prevents unevenness of drying along a direction of applying a coating liquid to secure uniformity at a boundary region of applying a coating liquid. The present invention is directed to a method of producing a functional film formed in a pattern form on a substrate by a wet process, the method of producing a functional film comprising the steps of: applying a solution formed by one of dissolving and dispersing a functional material in a solvent to a substrate; removing the solvent under reduced pressure; and baking the functional material under one of an inert gas atmosphere and reduced pressure in this order.Type: ApplicationFiled: July 1, 2005Publication date: March 2, 2006Inventors: Satoshi Nishigaki, Emi Yamamoto, Kazuya Ishida
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Publication number: 20040187737Abstract: An image forming method, device and a recording agent for forming an image through subtractive color mixing by using ink of plural color components different in hue. The ink is created by mixing a first coloring agent expressing one of the color components and a second coloring agent identical in hue to the first coloring agent. The ink has a higher spectral reflectance than a spectral reflectance of the first coloring agent.Type: ApplicationFiled: March 25, 2004Publication date: September 30, 2004Inventors: Takuya Iwanami, Haruo Yamamoto, Satoshi Nishigaki, Tohru Sakuwa
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Patent number: 6322940Abstract: An object of the invention is to implement a photoreceptor having high sensitivity and faithfully realizing high-density recording. An electrophotographic photoreceptor used for an image forming apparatus for forming a latent image at a resolution of 1200 dpi or more by exposing an object to light and visualizing the latent image with a reversal development system using a toner having an average particle size of 6 &mgr;m or less, which comprises an electrically conductive support, and a photosensitive layer composed of a charge generating layer formed on the electrically conductive support, and a charge transport layer formed on the charge generating layer, having a thickness of 20 &mgr;m or less.Type: GrantFiled: January 7, 2000Date of Patent: November 27, 2001Assignee: Sharp Kabushiki KaishaInventors: Satoshi Nishigaki, Hiroshi Sugimura
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Patent number: 6291120Abstract: An object of the invention is to obtain an electrophotographic photoreceptor having high sensitivity, high image quality, high stability and high resolution. A charge generating layer of the electrophotographic photoreceptor contains, as a charge generating substance, a crystalline titanyl phthalocyanine composition exhibiting, in an X-ray diffraction spectrum of a CuK&agr; characteristic X-ray (wavelength: 1.5418 Å), at least four diffraction peaks at Bragg angles (2&thgr;±0.2°) of 10.0° or lower, and a diffraction peak at a Bragg angle of 27.2° having an intensity smaller than the maximum diffraction intensity of the four diffraction peaks, or a lowly crystalline titanyl phthalocyanine composition exhibiting a diffraction peak having the maximum diffraction intensity at a Bragg angle (2&thgr;±0.2°) of 27.3°. A charge transporting layer of the electrophotographic photoreceptor contains, as a charge transporting substance, a bisamine compound.Type: GrantFiled: May 11, 2000Date of Patent: September 18, 2001Assignee: Sharp Kabushiki KaishaInventors: Satoshi Nishigaki, Takatsugu Obata, Akihiro Kondo
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Patent number: 5492786Abstract: The present invention is directed to an electrophotographic photoreceptor which is smooth without orange peel, inhibits the rise of a residual potential and the drop of a charged potential, and is excellent in stability even when it is repeatedly used.The photoreceptor comprises a charge generation material, a charge transport material, a polyarylate having a polymerization degree of 10 to 5,000, a polycarbonate having a polymerization degree of 10 to 5,000, and a polydimethylsiloxane having a polymerization degree of 0 to 2,000.Type: GrantFiled: August 19, 1994Date of Patent: February 20, 1996Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Sugimura, Satoshi Katayama, Kazushige Morita, Yoshimi Kojima, Yoshimasa Fujita, Satoshi Nishigaki, Kazuhiro Emoto
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Patent number: 5489496Abstract: An electrophotographic photoconductor comprising a conductive support, an undercoating layer provided on the conductive support and a photosensitive layer provided on the undercoating layer, in which the undercoating layer comprises a needle-like titanium oxide particles and a binder resin. The needle-like titanium oxide particles in the undercoating layer show a volume resistance in the range from 10.sup.5 .OMEGA..multidot.cm to 10.sup.10 .OMEGA..multidot.cm when a loading pressure of 100 Kg/cm.sup.2 is applied and have a short axis S having a length of 0.5 .mu.m or less and a long axis L having a length of 10 .mu.m or less and the aspect ratio of L/S ranging from 2 to 10. Further, the needle-like titanium oxide particles are contained in the undercoating layer in the range from 50 wt % to 95 wt % and the surface thereof remains untreated.Type: GrantFiled: July 19, 1994Date of Patent: February 6, 1996Assignee: Sharp Kabushiki KaishaInventors: Satoshi Katayama, Satoshi Nishigaki, Kazuhiro Emoto, Hiroshi Sugimura, Kazushige Morita, Yoshimi Kojima, Yoshimasa Fujita
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Patent number: 5393636Abstract: The present invention provides a process for producing a practical toner for the development of an electrostatic image which has an effect of preventing an offset phenomenon and has low-temperature fixing properties. The process for producing a toner of the present invention comprises the steps of dissolving a high-molecular polymer in a vinyl monomer, mixing the resultant solution with another toner material, and then carrying out suspension polymerization. Preferable examples of the high-molecular polymer include a polymer having a structure unit represented by the formula ##STR1## wherein R.sup.1 is hydrogen or a methyl group, and R.sup.2 is a straight-chain or branched alkyl group having 1 to 20 carbon atoms,and a polymer having a structure unit represented by the formula ##STR2## wherein R.sup.3 is hydrogen or a methyl group, and X is hydrogen, a methyl group, a halogen atom or a methoxy group.Type: GrantFiled: June 7, 1994Date of Patent: February 28, 1995Assignee: Sharp Kabushiki KaishaInventors: Jun Sugita, Kazushige Morita, Satoshi Katayama, Hiroshi Sugimura, Satoshi Nishigaki, Kazuhiro Emoto
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Patent number: 4942481Abstract: A contact-type image sensor comprising a light source that illuminates the manuscript to be read; photodetectors that convert the light reflected by the manuscript into an electrical signal; a substrate that is disposed between the photodetectors and the manuscript; an optical fiber array that is constituted by a bundle of optical fibers that are buried in the substrate, the optical fiber array introducing the reflected light from the manuscript into the light-receiving surfaces of the photodetectors; and a light-absorbing substance that is disposed on the outer surface of each of the optical fibers, wherein the light-absorbing substance is disposed on the outer surface of each of the optical fibers, except for the region with a given length from the end of the optical fiber array that faces the manuscript.Type: GrantFiled: July 11, 1988Date of Patent: July 17, 1990Assignee: Sharp Kabushiki KaishaInventors: Atsushi Yoshinouchi, Masataka Itoh, Shuhei Tsuchimoto, Keiji Tarui, Satoshi Nishigaki
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Patent number: 4939591Abstract: A contact-type image sensor comprising a light source that illuminates the manuscript to be read; photodetectors that convert the light reflected by the manuscript into an electrical signal; a substrate that is disposed between the photodetectors and the manuscript, a bundle of optical fibers being buried in the substrate; and wiring electrodes that are disposed on the top surface of the substrate corresponding to the light-emitting face of the bundle of optical fibers and that are disposed on the light-receiving surfaces of the photodetectors, wherein the photodetectors are disposed in such a manner that the light-receiving surfaces of the photodetectors face the light-emitting face of the bundle of optical fibers, the wiring electrodes disposed on the photodetectors being electrically bonded to the wiring electrodes disposed on the substrate.Type: GrantFiled: June 22, 1988Date of Patent: July 3, 1990Assignee: Sharp Kabushiki KaishaInventors: Masataka Itoh, Atsushi Yoshinouchi, Satoshi Nishigaki, Takashi Nukii, Shuhei Tsuchimoto
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Patent number: 4828876Abstract: A process for preparing a photoelectric conversion film containing one or more compound semiconductor made from Cd and group Vi element comprises coating a paste containing (a) a photoelectric conversion material, (b) a dopant, (c) a flux, (d) an organic binder, and optionally (e) a glass frit on a substrate, and sintering it at 300.degree. C.-800.degree. C. in an inert gas blanket.Type: GrantFiled: February 4, 1986Date of Patent: May 9, 1989Assignee: Sharp Kabushiki KaishaInventors: Soji Ohhara, Satoshi Nishigaki, Shuhei Tsuchimoto, Ryusuke Kita
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Patent number: 4766085Abstract: A method for manufacturing a contact type one-dimensional image sensor, which includes the step of providing a light receiving element portion composed of one or more of Group II-VI compounds semiconductor containing Cd on a substrate, and also providing a matrix wiring portion on the same substrate as that of the light receiving element portion, and the method is characterized by the step of forming an insulating layer for the formation of the matrix wiring portion in such a manner as to cover the light receiving element portion.Type: GrantFiled: August 7, 1986Date of Patent: August 23, 1988Assignee: Sharp Kabushiki KaishaInventors: Satoshi Nishigaki, Ryusuke Kita, Shuhei Tsuchimoto, Akiteru Rai, Masaru Iwasaki, Yuzi Matsuda, Takashi Nukii
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Patent number: 4701997Abstract: A method of making a photo-electric converting element which includes the steps of forming a photoconductive layer on an insulative substrate by applying a single substance of Group II-VI compound semiconductors which include Cd, or two or more Group II-VI compound powders; and then baking to form a photoconductive layer having a thickness of 1 to 10 .mu.m and a surface roughness of 0.2 to 1 .mu.m and also having its peripheral edge tapered outwardly with respect to the substrate at an angle not greater than 60.degree. and forming a counterelectrode by the use of a lift-off technique so as to overlay a portion of the photoconductive layer.Type: GrantFiled: August 8, 1986Date of Patent: October 27, 1987Assignee: Sharp Kabushiki KaishaInventors: Ryusuke Kita, Satoshi Nishigaki, Shuhei Tsuchimoto
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Patent number: 4644406Abstract: A two-dimensional image reading unit includes a semiconductor layer made of a photoelectric material having a pin structure, a plurality of transparent electrodes aligned parallel to each other and provided on one face of the semiconductor layer, and a plurality of opaque electrodes aligned parallel to each other and provided on the other face of the semiconductor layer such that the opaque electrodes intercept with the transparent electrodes. A photoelectric cell is defined at each crossing point of the transparent and opaque electrodes.Type: GrantFiled: January 29, 1985Date of Patent: February 17, 1987Assignee: Sharp Kabushiki KaishaInventors: Satoshi Nishigaki, Masataka Itoh, Shohichi Katoh
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Patent number: 4597012Abstract: A two-dimensional image read-out device comprises an insulating substrate, a plurality of Y-line electrodes formed on the insulating substrate and arranged parallel with each other, a plurality of X-line electrodes formed over the insulating substrate and arranged parallel with each other in a direction perpendicular to the Y-line electrodes, a photoconductive layer interposed between the Y-line and the X-line electrodes, gate electrodes for selecting a pair of the Y-line and the X-line electrodes, and three scanning circuits for selecting some of the Y-line electrodes, and some of the X-line electrodes, and at least one of the gate electrodes, respectively.Type: GrantFiled: November 21, 1984Date of Patent: June 24, 1986Assignee: Sharp Kabushiki KaishaInventors: Masataka Itoh, Satoshi Nishigaki, Shohichi Katoh