Patents by Inventor Keisuke Shiba
Keisuke Shiba 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: 11905425Abstract: Provided is an inkjet active-energy-ray-curable composition including a bisphenol-type methacrylate, a low-viscosity monomer, and an inorganic filler.Type: GrantFiled: March 12, 2022Date of Patent: February 20, 2024Assignee: Ricoh Company, Ltd.Inventors: Yuki Shingai, Hiroyuki Naito, Keisuke Shiba
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Publication number: 20230211550Abstract: A liquid fabrication applied to a layer of powder containing an inorganic particle, wherein the liquid fabrication has a powder contact angle with the inorganic particle of 50 degrees or greater and satisfies the following relationship 1: ?cos?/??1.5 m/s, where ? represents the powder contact angle, ? represents a surface tension in mN/m of the liquid fabrication at 23 degrees C., and ? represents a viscosity in mPa·s of the liquid fabrication at 25 degrees C.Type: ApplicationFiled: January 3, 2023Publication date: July 6, 2023Applicant: Ricoh Company, Ltd.Inventors: Koji TAKIMOTO, Shinichiroh Satoh, Keisuke Shiba, Yuki Shingai, Noriaki Okada, Yuji Nagatomo, Tomoki Kai, Hisataka Takagi, Yoichi Ito, Tsuyoshi Arao, Takashi Matsumura, Tomomi Akieda
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Publication number: 20220306880Abstract: Provided is an inkjet active-energy-ray-curable composition including a bisphenol-type methacrylate, a low-viscosity monomer, and an inorganic filler.Type: ApplicationFiled: March 12, 2022Publication date: September 29, 2022Applicant: Ricoh Company, Ltd.Inventors: Yuki Shingai, Hiroyuki Naito, Keisuke Shiba
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Patent number: 6623564Abstract: The present invention relates to a method of removing a layer of material from a synthetic resin or an organic acid ester of cellulose comprising: washing the layer from the substrate with an aqueous alkali solution with a temperature of at least 105° C., and then washing the alkali solution from the substrate. Furthermore, the present invention relates to a pressure vessel used for the above method, comprising a longitudinal cylindrical body having a circular cross-section, an end plate connected to the top of the cylindrical body and an inverted end plate connected to the lower part of the cylindrical body in a manner such that its convex part faces upwards wherein the pressure vessel has a strainer plate and a stirring blade inside the cylindrical body.Type: GrantFiled: February 21, 2001Date of Patent: September 23, 2003Assignee: Panac Industries, Inc.Inventors: Masatoshi Yamaguchi, Takahito Kikukawa, Kyoichi Kishi, Yoshihiro Tuyuki, Akira Nakazawa, Kouichi Oota, Keisuke Shiba, Nobuyuki Ito
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Publication number: 20010020483Abstract: The present invention relates to a method of removing a layer of material from a synthetic resin or an organic acid ester of cellulose comprising: washing the layer from the substrate with an aqueous alkali solution with a temperature of at least 105° C., and then washing the alkali solution from the substrate. Furthermore, the present invention relates to a pressure vessel used for the above method, comprising a longitudinal cylindrical body having a circular cross-section, an end plate connected to the top of the cylindrical body and an inverted end plate connected to the lower part of the cylindrical body in a manner such that its convex part faces upwards wherein the pressure vessel has a strainer plate and a stirring blade inside the cylindrical body.Type: ApplicationFiled: February 21, 2001Publication date: September 13, 2001Inventors: Masatoshi Yamaguchi, Takahito Kikukawa, Kyoichi Kishi, Yoshihiro Tuyuki, Akira Nakazawa, Kouichi Oota, Keisuke Shiba, Nobuyuki Ito
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Patent number: 5575575Abstract: A small-sized printer includes a printing section equipped with a shuttle head in which impact-type printing units are arranged in juxtaposition in a sub-scanning direction, a cylindrical cam for reciprocating the shuttle head in the sub-scanning direction, and paper feeding rollers for feeding a standard sheet in a main scanning direction; an input device for inputting information; a display device for displaying information; a RAM for storing information; and a CPU for controlling the printing section, the input section, the display device and the RAM and performing calculation on information. The printing section and the paper feeding rollers are provided in a body case in such a way as to be exposed where they are opposed to a case cover, which has a flat platen and spring members at positions opposed to the printing section, and ribs adapted to come into contact with the standard sheet and serving as a positioning device and as a sliding guide.Type: GrantFiled: March 15, 1995Date of Patent: November 19, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takehiko Ide, Hiroki Kokubu, Takahisa Shiramizu, Yuji Tanaka, Tetsuo Hayama, Takashi Takeda, Hiroyuki Fukusako, Keisuke Shiba, Akihiro Nishiyama, Norio Amamoto, Hidehito Nakamura, Tsutomu Egashira, Kouji Okada
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Patent number: 5399475Abstract: A silver halide photographic material having at least one light-sensitive silver halide emulsion layer coated on a support, wherein the silver halide emulsion layer contains silver chlorobromide grains comprising silver chlorobromide containing 90 mol % or more of silver chloride, having at least one region in which the silver bromide content is high at the vicinity of the corner of the grains, and with not more than 15 mol % of average silver bromide content at the surface of the grains. A method producing the silver halide photographic materials is also disclosed.Type: GrantFiled: December 11, 1992Date of Patent: March 21, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hasebe, Osami Tanabe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa
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Patent number: 5234802Abstract: A method for processing a silver halide photographic material is disclosed, comprising a support and a light-sensitive silver halide emulsion layer provided on the frontside of the support, said photographic material being arranged in a processing container containing a processing solution to form a gap or series of continuous gaps adjacent to the surface of the light-sensitive layer between the frontside of the photographic material and the backside of the same photographic material, or between the frontside of the photographic material and a second photographic material, or between the frontside of the photographic material and a light-insensitive member, said gap or continuous series of gaps having a substantially constant gap width, comprising the steps of introducing a processing solution stream into each gap and replacing the processing solution thus introduced in an amount at least equivalent to the capacity of the gaps.Type: GrantFiled: May 9, 1991Date of Patent: August 10, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Nakamura, Toshio Kurokawa, Keisuke Shiba, Noboru Sasaki, Ken Kawada, Kouichi Sasaki
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Patent number: 5218392Abstract: The position of a principal image within a frame is designated manually or in association with the operation of the automatic focussing mechanism. The position information of the principal image is recorded on a photographic film when a subject is photographed. In obtaining a photoprint, the position information is read from the frame to be printed, and the principal image within the frame is identified. A characteristic value used for calculating an exposure amount is derived from the identified principal image, so as to execute an exposure control emphasizing the principal image.Type: GrantFiled: May 5, 1992Date of Patent: June 8, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiichiro Sakamoto, Takaaki Terashita, Keisuke Shiba, Jin Murayama
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Patent number: 5198328Abstract: A silver halide color photographic material comprising a support having thereon at least three photosensitive layers containing a silver chloride emulsion or a silver chlorobromide emulsion having an average silver chloride content of at least 96 mol % and containing substantially no silver iodide, said at least three photosensitive layers comprising a cyan coupler-containing layer, a magenta coupler-containing layer and a yellow coupler-containing layer, wherein said at least three photosensitive layers each has different spectral sensitivity peak in the photosensitive wavelength regions of 650 to 690 nm, 720 to 790 nm and 770 to 850 nm, respectively, and the total coating weight of silver halide is not more than 0.78 g/m.sup.2 in terms of silver, and the above-disclosed material wherein the support is a reflective support comprising a base paper impregnated with a synthetic polymer through the surface of the base paper, and a white pigment-containing water-resistant resin layer coated on the base paper.Type: GrantFiled: August 23, 1991Date of Patent: March 30, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Tadashi Ogawa
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Patent number: 5185236Abstract: A full color recording material which has, on a support, at least three silver halide photosensitive emulsion layers which have different color sensitivities and which contain a yellow coupler, magenta coupler and cyan coupler, respectively, and in which at least two of these layers are selectively spectrally sensitized to match semiconductor laser light beams of wavelengths greater than 670 nm, wherein said at least three silver halide photosensitive layers which have different color sensitivities each contains silver chlorobromide grains with a layer average silver chloride content of at least 96 mol %, and said silver chlorobromide grains have a silver bromide local phase of which the silver bromide content is higher than that of the surroundings and a method for forming color images wherein the recording material is imagewise exposed while being transported at a feed rate which matches the scanning rate with semiconductor light beams, and substantially continuously to the exposing, the material is subjectType: GrantFiled: July 15, 1991Date of Patent: February 9, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Kiyoshi Kawai, Masaki Okazaki, Yoshiharu Okino
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Patent number: 5148198Abstract: A lens-fitted photographic film unit provided with a shutter, a taking lens and a film wind-up mechanism has a film unit housing, an exposure station, a film supplying chamber and a film take-up chamber, which is provided with a spool for tightly winding exposed film. A film outlet is provided with the film take-up chamber to let out a film leader to the outside when rotating the spool in the unwinding direction. Light trapping fabric is attached in the film outlet to trap external light. In a preferred embodiment, the friction coefficient of a back surface is 0.35 or less with respect to an emulsion surface, whereas the dynamic friction coefficient is 0.36 or less with respect to a steel ball. A film processor for developing the film in the film unit is provided with a holder for loading film units. A spool rotating mechanism rotates the spool to automatically let out the film.Type: GrantFiled: June 4, 1991Date of Patent: September 15, 1992Assignee: Fuji Photo Film Co., Ltd.Inventor: Keisuke Shiba
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Patent number: 5139870Abstract: A photographic support is disclosed, comprising a metal surface having mirror reflectivity or secondary diffuse reflectivity and an adhesive layer provided on the metal surface, wherein the adhesive layer comprises a copolymer containing vinylidene chloride, vinyl chloride, vinyl acetate and maleic anhydride.Type: GrantFiled: November 15, 1988Date of Patent: August 18, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuyuki Koike, Tetsuro Fuchizawa, Keisuke Shiba
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Patent number: 5077182Abstract: Disclosed is a silver halide color photographic material comprising at least one yellow coupler-containing silver halide emulsion layer (BL) spectrally sensitized such that the specific spectral sensitivity range falls within the scope of from 400 nm to 520 nm, at least one magenta coupler-containing silver halide emulsion layer (GL) spectrally sensitized such that the specific spectral sensitivity range falls within the scope of from 470 nm to 620 nm, and at least one cyan coupler-containing silver halide emulsion layer (RL) spectrally sensitized such that the specific spectral sensitivity range falls within the scope of from 540 nm to 700 nm, wherein the center of gravity of the sensitivity wavelength of the GL's spectral sensitivity distribution (.lambda..sub.G) falls within the range of from about 520 nm to about 580 nm, the center of gravity of the sensitivity wavelength of the RL's spectral sensitivity distribution (.lambda..sub.Type: GrantFiled: October 5, 1987Date of Patent: December 31, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Noboru Sasaki, Keisuke Shiba
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Patent number: 5075205Abstract: Silver halide photographic material which has a hydrophilic colloid layer containing a solid micrograin dispersion of compounds represented by the following general formula (I): ##STR1## wherein, T.sup.0, T.sup.1 and T.sup.2 each independently represents a hydrogen atom, a halogen atom or a cyano, nitro, carboxy, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, sulfamoyl, carbamoyl, amino, sulfonamido, carbonamido, ureido, sulfamoylamino, hydroxyl, alkenyl or acyl group, R.sup.3 and R.sup.4 each independently represents a hydrogen atom, a halogen atom or an alkoxy, alkyl, alkenyl, aryloxy or aryl group, R.sup.5 and R.sup.6 each independently represents a hydrogen atom or a group in which hydrogen atom substitution is possible, and R.sup.7 and R.sup.8 each independently represents an alkyl, aryl, vinyl, acyl or alkyl- or arylsulfonyl group, provided that rings may be formed by linkage of T.sup.1 with T.sup.2, R.sup.3 with R.sup.5, R.sup.4 with R.sup.6, R.sup.7 with R.sup.8, R.Type: GrantFiled: June 5, 1991Date of Patent: December 24, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshio Inagaki, Keiichi Adachi, Keisuke Shiba, Yuji Mihara
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Silver halide color photosensitive material having a reflective support and a specified volume ratio
Patent number: 5075204Abstract: A silver halide color photosensitive material comprising a support having a metal surface with secondary diffuse reflection and a total reflectance of 0.5 or more in the visible wavelength region of 420 to 680 nm, said support having provided thereon a photosensitive silver halide emulsion layer containing a yellow coupler, a photosensitive silver halide emulsion layer containin a magenta coupler, and a photosensitive silver halide emulsion layer containing a cyan coupler and at least one non-photosensitive hydrophilic colloid layer, wherein the volume ratio R of the hydrophilic constituents in each photosensitive silver halide emulsion layer with respect to the non-hydrophilic constituents therein is 1.30 or less, and the photosensitive silver halide emulsion layer containing a color coupler which is arranged nearest the support has an R value of 1.20 or less.Type: GrantFiled: March 13, 1990Date of Patent: December 24, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Tadashi Ogawa -
Patent number: 5064752Abstract: A silver halide photographic material comprising a support having provided thereon at least two hydrophilic colloid layers, wherein at least one of the hydrophilic layers comprises water or a hydrophilic colloid and a compound represented by formula (I) dispersed therein using water or a water-soluble organic solvent:PWR-(Time).sub.t -PUG (I)wherein PWR represents a group capable of releasing (Time).sub.t -PUG upon reduction;Time represents a group capable of releasing the PUG residual group by the successive reaction, after being released as (Time).sub.t -PUG;t represents 0 or 1;PUG represents a photographically useful group; and at least one water-soluble group exists in one molecule of the compound.Type: GrantFiled: June 25, 1990Date of Patent: November 12, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunobu Katoh, Kozo Sato, Keisuke Shiba
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Patent number: 5057402Abstract: A silver halide photographic material having at least one light-sensitive emulsion layer containing surface latent image type silver halide grains on a support, wherein the emulsion layer contains a silver halide emulsion, in an amount of 50% by weight or more, which is a substantially silver iodide-free silver chlorobromide comprising silver chloride in an amount of 70 mol % or more (as a mean value) of the total silver halide constituting the silver halide grains, which has a silver bromide-localized phase with a silver bromide content of less than 70 mol % in the inside or on the surface of the grains, and which further contains ions on in the grains.Type: GrantFiled: January 18, 1989Date of Patent: October 15, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Kazunori Hasebe, Masahiro Asami
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Patent number: 5057405Abstract: A silver halide color photographic material comprising a support having thereon at least three photosensitive layers containing a silver chloride emulsion or a silver chlorobromide emulsion having an average silver chloride content of at least 96 mol % and containing substantially no silver iodide, said at least three photosensitive layers comprising a cyan coupler-containing layer, a magenta coupler-containing layer and a yellow coupler-containing layer, wherein said at least three photosensitive layers each has different spectral sensitivity peak in the photosensitive wavelength regions of 650 to 690 nm, 720 nm and 770 to 850 nm, respectively, and the total coating weight of silver halide is not more than 0.78 g/m.sup.2 in terms of silver, and the above-disclosed material wherein the support is a reflective support comprising a base paper impregnated with a synthetic polymer through the surface of the base paper, and a white pigment-containing water-resistant resin layer coated on the base paper.Type: GrantFiled: April 4, 1990Date of Patent: October 15, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Tadashi Ogawa
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Patent number: 5053322Abstract: A method for processing a silver halide color photographic material is disclosed, comprising a support having a thin film of metal or metal oxide on a substrate; said thin film having mirror surface reflection properties or secondary diffuse reflection properties and having a surfaced reflectance of at least 0.5; said photographic material having thereon, in order outwardly from the support, an adhesive layer and at least one light-sensitive silver halide emulsion layer, by the steps which comprise developing the silver halide color photographic material with a developing bath containing a color developing agent and at least one compound represented by formulae (I), (II), (III) or (IV): ##STR1## wherein M each represents hydrogen, an alkali metal or an ammonium group; and R.sub.1 represents a lower alkyl group; ##STR2## wherein R.sub.2 R.sub.3 and R.sub.4 each represents --COOM, --PO.sub.3 M.sub.Type: GrantFiled: October 27, 1989Date of Patent: October 1, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Akira Abe