Patents by Inventor Tadaaki Tani
Tadaaki Tani 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: 7153642Abstract: A high silver iodide photographic emulsion is provides, which has a high sensitivity and a narrow size distribution, and is a photosensitive silver halide photographic emulsion having a silver iodide content of 90 mol % or more, wherein the average grain size (R) and the average crystallite size (r) of silver halide emulsion grains in the emulsion satisfy the relationship of 1?R/r<2.Type: GrantFiled: October 10, 2003Date of Patent: December 26, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Aiba, Tadaaki Tani, Toshio Tsukada
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Publication number: 20040076913Abstract: A high silver iodide photographic emulsion is provides, which has a high sensitivity and a narrow size distribution, and is a photosensitive silver halide photographic emulsion having a silver iodide content of 90 mol % or more, wherein the average grain size (R) and the average crystallite size (r) of silver halide emulsion grains in the emulsion satisfy the relationship of 1≦R/r<2.Type: ApplicationFiled: October 10, 2003Publication date: April 22, 2004Inventors: Satoshi Aiba, Tadaaki Tani, Toshio Tsukada
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Patent number: 6334392Abstract: A recording drum has a clamp groove extending in its circumferential direction formed on its outer peripheral surface. A plurality of front end clamps are attached to the outer peripheral surface of the recording drum. Rear end clamps are attached so as to be movable and so as to be fixable along the clamp groove on the outer peripheral surface of the recording drum. A recording head is disposed ahead of the recording drum, and a clamp driving device is disposed behind the recording drum. The clamp driving device comprises a first driving device for fixing the front end clamps and fixing and releasing the rear end clamps and a second driving device for releasing the front end clamps. The front end clamps and the rear end clamps reliably fix a front end and a rear end of a plate to the outer peripheral surface of the recording drum by a reaction force produced by a spring and a centrifugal force produced by the rotation of the recording drum.Type: GrantFiled: July 12, 2000Date of Patent: January 1, 2002Assignee: Dainippon Screen Mfg. Co., Ltd.Inventors: Toru Kawada, Shiro Kitawaki, Tadaaki Tani, Arifumi Omoto, Kazuma Kan
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Drawing apparatus having fixing member for clamping material on drum and method of mounting material
Patent number: 6164204Abstract: A recording drum has a clamp groove extending in its circumferential direction formed on its outer peripheral surface. A plurality of front end clamps are attached to the outer peripheral surface of the recording drum. Rear end clamps are attached so as to be movable and so as to be fixable along the clamp groove on the outer peripheral surface of the recording drum. A recording head is disposed ahead of the recording drum, and a clamp driving device is disposed behind the recording drum. The clamp driving device comprises a first driving device for fixing the front end clamps and fixing and releasing the rear end clamps and a second driving device for releasing the front end clamps. The front end clamps and the rear end clamps reliably fix a front end and a rear end of a plate to the outer peripheral surface of the recording drum by a reaction force produced by a spring and a centrifugal force produced by the rotation of the recording drum.Type: GrantFiled: August 4, 1999Date of Patent: December 26, 2000Assignee: Dainippon Screen Mfg. Co., Ltd.Inventors: Toru Kawada, Shiro Kitawaki, Tadaaki Tani, Arifumi Omoto, Kazuma Kan -
Patent number: 5500336Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, where at least one silver halide emulsion layer contains a silver halide emulsion obtained by treating a silver halide emulsion containing a dye previously added thereto with a solid adsorbent which is a porous organic synthetic resin without any ion exchange group to thereby desorb the dye adsorbed.Type: GrantFiled: January 28, 1994Date of Patent: March 19, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Asanuma, Fumitaka Ueda, Tadaaki Tani
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Patent number: 5192653Abstract: A method for spectrally sensitizing silver halide emulsions is disclosed, comprising the step of adding a cyanine dye, which provides a J-band when added to silver halide emulsions, to a silver halide emulsion followed by ripening with such conditions that the relative quantum yield .phi..sub.r of spectral sensitization assumes a value of 1/2 or less of the .phi..sub.r of spectral sensitization obtained when the dye is added to the emulsion under ripening conditions of 40.degree. C. and 20 minutes from the time of addition of the dye to the emulsion until the time of coating the emulsion, and then ripening the silver halide emulsions. In one embodiment of the disclosed method, a heterocyclic compound which contains a mercapto group is added to the emulsion before the addition of the dye in an amount sufficient to increase the .phi..sub.r.Type: GrantFiled: February 26, 1992Date of Patent: March 9, 1993Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani
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Patent number: 4908303Abstract: A silver halide photographic material is disclosed containing at least one silver halide emulsion layer, in which (1) the silver halide grains constituting the emulsion layer have been spectrally sensitized by at least one adsorbable spectral sensitizing dye added thereto before the completion of chemical ripening of the grains, and (2) at least one luminous dye which has a quantum efficiency of 0.1 or more when the concentration thereof in dry gelatin at room temperature is 10.sup.-4 mol/dm.sup.3 and which can be substantially completely removed by development is added to a hydrophilic dispersion medium for the emulsion layer exclusive of the silver halide grains in a concentration of 2.0 mmol/dm.sup.3 in the dispersion medium. The addition of the spectral sensitizing dye is not limitative and can be either before the completion of the formation of the silver halide grains or during a stage from the completion of the formation of the grains to the completion of the chemical ripening thereof.Type: GrantFiled: February 10, 1988Date of Patent: March 13, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tsutomu Miyasaka, Tadaaki Tani, Tadao Sugimoto
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Patent number: 4900656Abstract: A silver halide color photographic material and a process for preparing the photographic material are disclosed, comprising a support and at least one silver halide emulsion layer on the support, wherein the emulsion layer contains a silver halide emulsion which has been spectrally sensitized by adding a spectrally sensitizing dye prior to the completion of formation of silver halide particles, and at least one cyan coupler represented by formula (I) ##STR1## wherein R.sub.11 and R.sub.12 each represents an alkyl group, an aryl group, a heterocyclic group, an alkyloxy group, an aryloxy group, a heterocyclic oxy group, an alkylamino group, an arylamino group, or a heterocyclic amino group, R.sub.13 represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxyl group, an aryloxy group, an acyloxy group, or an acylamino group, X is a group capble of being released upon the oxidative coupling reaction with a developing agent, or R.sub.12 and R.sup.13 together form a 5- or 6-membered ring.Type: GrantFiled: September 26, 1988Date of Patent: February 13, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadaaki Tani, Mikio Ihama, Masaki Okazaki
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Patent number: 4828972Abstract: A method for manufacturing a silver halide emulsion comprising the steps of forming silver halide grains in the presence of a hydrophilic colloid, physical ripening, desalting, and chemical ripening, wherein a photographic spectral sensitizing dye is added to the emulsion after adding at least 85% by weight of a soluble silver salt solution but before the desalting step is described.Type: GrantFiled: October 26, 1987Date of Patent: May 9, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Ihama, Sadanobu Shuto, Tadaaki Tani, Naoyasu Deguchi
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Patent number: 4741995Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains a silver halide emulsion which is spectrally sensitized by adding a spectral sensitizing dye prior to the completion of formation of silver halide particles and at least one kind of pyrazoloazole type magenta coupler represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being released upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.N-- or --NH--, one of the Za--Zb bond and the Zb--Zc bond being a double bond and the other being a single bond, and when the Zb--Zc bond is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sup.Type: GrantFiled: April 28, 1986Date of Patent: May 3, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadaaki Tani, Mikio Ihama, Kiyoshi Nakazyo
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Patent number: 4693965Abstract: A method for manufacturing a chemically and spectrally sensitized silver halide emulsion is described, which comprises carrying out chemical ripening of the emulsion in the presence of an iridium salt and a photographic spectral sensitizing dye.Type: GrantFiled: November 27, 1985Date of Patent: September 15, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Ihama, Tadaaki Tani
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Patent number: 4683193Abstract: A process for producing a spectrally sensitized silver halide photographic emulsion is described, comprising adding a substantially water-insoluble spectral sensitizing dye in an aqueous carrier to an emulsion before completion of the formation of silver halide grains without using an organic solvent.Type: GrantFiled: March 21, 1985Date of Patent: July 28, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Ihama, Tadaaki Tani, Hiroshi Ohnishi
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Patent number: 4574115Abstract: A silver halide light-sensitive material is described, comprising(1) an emulsion layer containing light-sensitive silver halide grains, and(2) a layer containing metal salt grains on which a dye is adsorbed, which cannot be substantially developed and are sparingly soluble in water,wherein the absorption maximum of said dye is separated by 20 nm or more from the sensitization maximum of an emulsion layer located in a position farther from the light source than the layer containing said dye.Type: GrantFiled: August 22, 1984Date of Patent: March 4, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiichi Adachi, Tadashi Ikeda, Tadaaki Tani
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Patent number: 4105454Abstract: A silver halide photographic emulsion containing a combination of at least one merocyanine dye free of acidic groups and a benzotriazole compound which can produce a slightly soluble silver salt by reaction with silver ion, where the solubility product of the resulting silver salt is smaller than that of silver chloride, in effective supersensitizing amounts which exhibits reduced fog and a markedly increased spectral sensitivity.Type: GrantFiled: February 2, 1977Date of Patent: August 8, 1978Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani
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Patent number: 4097284Abstract: A method for spectrally sensitizing a silver halide photographic emulsion with a supersensitizing combination as hereinafter described, wherein the combination of a trimethinecyanine dye and a nitrogen-containing heterocyclic compound having a mercapto group, which is capable of producing a slightly soluble silver salt by reacting with a silver ion, is incorporated in the emulsion in a supersensitizing amount.Type: GrantFiled: October 27, 1976Date of Patent: June 27, 1978Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani
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Patent number: 4088494Abstract: A chemically sulfur-sensitized silver halide photographic emulsion which contains: (1) at least 80 mol% silver bromide or silver chloride; wherein substantially are of the silver halide particles present are of the cubic crystal form; and (2) a sensitizing amount of an organic compound having at least one mercapto group and capable of reacting with a silver ion to form a water-insoluble silver salt. A method of sensitizing such an emulsion and a process of forming such an emulsion are also disclosed.Type: GrantFiled: September 1, 1977Date of Patent: May 9, 1978Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani
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Patent number: 4078937Abstract: A process for preparing a sulfur-sensitized silver halide photographic emulsion whose average grain size does not exceed 0.5 .mu.m, which comprises forming the silver halide grains in the presence of ammionia and incorporating therein at least one hydroxytetrazaindene compound represented by the following general formula (I) or (II): ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aliphatic group or an aromatic group, and n represents 1 or 2; to thereby increase sensitivity.Type: GrantFiled: May 9, 1977Date of Patent: March 14, 1978Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadaaki Tani, Shigeharu Urabe
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Patent number: 4030927Abstract: A silver halide photographic emulsion supersensitized by a combination of (1) at least one cyanine sensitizing dye containing therein two 5- or 6-membered nitrogen-containing heterocyclic nuclei which may be the same as or different from each other and which are attached, through a conjugated methine chain consisting of three, five or seven methine groups, to each other, and (2) a benzotriazole substituted with at least one halogen atom, both (1) and (2) being present in a supersensitizing amount. The emulsion shows reduced fog and intensified spectral sensitivity than an emulsion containing the cyanine dye alone.Type: GrantFiled: January 14, 1976Date of Patent: June 21, 1977Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani
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Patent number: 3970459Abstract: A process for developing a light-sensitive material which comprises processing a direct reversal silver halide photographic light-sensitive material comprising a support having thereon a silver halide photographic emulsion comprising1. cubic silver halide grains having fogging nuclei therein provided by adding a strong reducing agent to the emulsion and ripening the emulsion, and2.A. a compound acting as an electron acceptor being capable of receiving photoelectrons and also acting as a development accelerator bearing atoms capable of being positively charged in a developer orB. a compound as an electron acceptor capable of receiving photoelectrons and a compound as a development accelerator bearing atoms capable of being positively charged in a developer in an aqueous solution of a hydrophilic colloid with a developer containing a developing agent bearing atoms capable of being negatively charged in the developer is disclosed.Type: GrantFiled: September 10, 1974Date of Patent: July 20, 1976Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadaaki Tani