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).

  • Publication number: 20220306880
    Abstract: Provided is an inkjet active-energy-ray-curable composition including a bisphenol-type methacrylate, a low-viscosity monomer, and an inorganic filler.
    Type: Application
    Filed: March 12, 2022
    Publication date: September 29, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuki Shingai, Hiroyuki Naito, Keisuke Shiba
  • Patent number: 6623564
    Abstract: 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: Grant
    Filed: February 21, 2001
    Date of Patent: September 23, 2003
    Assignee: Panac Industries, Inc.
    Inventors: Masatoshi Yamaguchi, Takahito Kikukawa, Kyoichi Kishi, Yoshihiro Tuyuki, Akira Nakazawa, Kouichi Oota, Keisuke Shiba, Nobuyuki Ito
  • Publication number: 20010020483
    Abstract: 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: Application
    Filed: February 21, 2001
    Publication date: September 13, 2001
    Inventors: Masatoshi Yamaguchi, Takahito Kikukawa, Kyoichi Kishi, Yoshihiro Tuyuki, Akira Nakazawa, Kouichi Oota, Keisuke Shiba, Nobuyuki Ito
  • Patent number: 5575575
    Abstract: 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: Grant
    Filed: March 15, 1995
    Date of Patent: November 19, 1996
    Assignee: 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
  • Patent number: 5399475
    Abstract: 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: Grant
    Filed: December 11, 1992
    Date of Patent: March 21, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunori Hasebe, Osami Tanabe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa
  • Patent number: 5234802
    Abstract: 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: Grant
    Filed: May 9, 1991
    Date of Patent: August 10, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Nakamura, Toshio Kurokawa, Keisuke Shiba, Noboru Sasaki, Ken Kawada, Kouichi Sasaki
  • Patent number: 5218392
    Abstract: 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: Grant
    Filed: May 5, 1992
    Date of Patent: June 8, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiichiro Sakamoto, Takaaki Terashita, Keisuke Shiba, Jin Murayama
  • Patent number: 5198328
    Abstract: 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: Grant
    Filed: August 23, 1991
    Date of Patent: March 30, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Tadashi Ogawa
  • Patent number: 5185236
    Abstract: 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 subject
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: February 9, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Kiyoshi Kawai, Masaki Okazaki, Yoshiharu Okino
  • Patent number: 5148198
    Abstract: 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: Grant
    Filed: June 4, 1991
    Date of Patent: September 15, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Keisuke Shiba
  • Patent number: 5139870
    Abstract: 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: Grant
    Filed: November 15, 1988
    Date of Patent: August 18, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuyuki Koike, Tetsuro Fuchizawa, Keisuke Shiba
  • Patent number: 5077182
    Abstract: 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: Grant
    Filed: October 5, 1987
    Date of Patent: December 31, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Sasaki, Keisuke Shiba
  • Patent number: 5075204
    Abstract: 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: Grant
    Filed: March 13, 1990
    Date of Patent: December 24, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Tadashi Ogawa
  • Patent number: 5075205
    Abstract: 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: Grant
    Filed: June 5, 1991
    Date of Patent: December 24, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Inagaki, Keiichi Adachi, Keisuke Shiba, Yuji Mihara
  • Patent number: 5064752
    Abstract: 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: Grant
    Filed: June 25, 1990
    Date of Patent: November 12, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunobu Katoh, Kozo Sato, Keisuke Shiba
  • Patent number: 5057405
    Abstract: 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: Grant
    Filed: April 4, 1990
    Date of Patent: October 15, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Tadashi Ogawa
  • Patent number: 5057402
    Abstract: 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: Grant
    Filed: January 18, 1989
    Date of Patent: October 15, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Kazunori Hasebe, Masahiro Asami
  • Patent number: 5053322
    Abstract: 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: Grant
    Filed: October 27, 1989
    Date of Patent: October 1, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Akira Abe
  • Patent number: 5051342
    Abstract: A silver halide photographic light-sensitive material having at least one light-sensitive emulsion layer containing surface latent image-type silver halide grains, coated on a reflective support, in which said at least one emulsion layer contains regular crystal grains of silver chloride or silver chlorobromide having a mean silver chloride content of 80 mol % or more on the basis of the total silver halide grains contained therein and substantially does not contain silver iodide, and in which a colloidal silver-containing layer is located adjacent to said emulsion layer, wherein at least one of said colloidal silver-containing layer, said emulsion layer and an interlayer therebetween contains at least one mercaptoazole compound. The material is, after having imagewise exposed, processed with a color developer within 90 seconds. The material forms an image with excellent sharpness and whiteness.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: September 24, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Kazunori Hasebe, Seiji Ichijima
  • Patent number: 5037728
    Abstract: A photographic material package unit composed of a container sealed to ambient light containing a silver halide color light-sensitive film, the container having a shutter means for admitting a predetermined amount of light to the container and a lens for forming an image on the film using the light admitted by the shutter means; the color film being composed of a support having thereon:(a) at least one blue-sensitive silver halide emulsion layer containing a yellow coupler and having a spectral sensitivity distribution with a maximum spectral sensitivity of from 406 nm to 480 nm, the distribution within 80% of the maximum value being in a range of from 400 nm to 500 nm;(b) at least one green-sensitive silver halide emulsion layer containing a magenta coupler and having a spectral sensitivity distribution with a maximum spectral sensitivity of from 527 nm to 580 nm, the distribution within 80% of the maximum value being in a range of from 500 nm to 600 nm;(c) at least one red-sensitive silver halide emulsion l
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: August 6, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Noboru Sasaki